Annual Report 2011

Annual Report 2011

Research Institute of Electrical Communication, Tohoku University

Research Institute of Electrical Communication, Tohoku University

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Annual Report of Research Institute of Electrical Communication 2011

Contents
1. Preface… ……………………………………………………………………………… 1
2. Organization…………………………………………………………………………… 3
3. Research Activities
Research Division
・

Information Devices Division… ………………………………………… 5

・

Broadband Engineering Division…………………………………………11・

Human Information Systems Division… ………………………………19・

Systems & Software Division… …………………………………………25…

・Sponsored Division…………………………………………………………33

Laboratories and Center・Laboratory for Nanoelectoronics and Spintoronics……………………35

・

Laboratory for Brainware Systems………………………………………44

・

Research Center for 21st Century Information Technology… ………50

・Management Office for Safety and Health… …………………………53

・

Flexible Information System Research Center…………………………54

・

Fundamental Technology Center…………………………………………55

4. Nation-wide Cooperative Research Projects………………………………………57
5. Symposium… …………………………………………………………………………67
6. Study Groups on Electrical Communication………………………………………71
7. International Activities… ……………………………………………………………75
8. Periodicals Published by the Institute… …………………………………………79
9. Staff, Land and Buildings,Budget… ………………………………………………81
10. Afterword… ……………………………………………………………………………83

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2011

1．Preface
On behalf of the Research Institute of Electrical Communication (RIEC)
of Tohoku University, I would like to express my gratitude for the kind andunfailing support our work receives. I invite you all to read this report of
RIEC’s research activities in fiscal 2011 and to give us your opinions andcomments.
RIEC was established in 1935 as a research institute affiliated with the
School of Engineering, where pioneering work in information andcommunications had already resulted in breakthroughs such as the
Yagi-Uda antenna and the split-anode magnetron. Over the years,
researchers dedicated to addressing the “theory and applications ofintelligent information science and communication Engineering” have given
back to society the fruits of their work in these fields. Close and smoothinterpersonal communication is fundamental to maintaining and developing
a flourishing and humane society, and the technologies that make thispossible are taking on ever-increasing importance in the information age. To
meet these social needs, RIEC is organized with a three-part structure: four
Research Divisions whose programs have a twenty-year horizon; tworesearch facilities working with a ten-year horizon; and the Research Centerfor 21st Century Information Technology, which aims at the practicalapplication of IT results within a five-year time frame. Furthermore,through close collaboration between RIEC and the six major courses run by
the Graduate Schools of Engineering, Information Sciences, and Biomedical
Engineering that together make up the Group of Electrical Engineering,
Communication Engineering, Electronic Engineering, and Information
Engineering, we endeavor to train international researchers and highly
skilled engineers while concurrently pursuing cutting-edge research.
In April 2010, RIEC took a further step forward when it was promoted froma National Center for Cooperative Research to a Joint Usage/ResearchCenter. This represents an opportunity to demonstrate RIEC’s importantrole within the university, but also places great demands on us as wequestion the value of our existence and invite society’s evaluation. Last year,
through the active management of over 70 nationwide cooperative research
projects, we were able to expedite technology exchanges and liaisons withindustry and government. We remain committed to do everything in our
power to fully realize human communication, and I look forward to yourcontinuing support and encouragement of our endeavors.

Professor Masataka Nakazawa
May 17, 2012
Director, Research Institute of Electrical Communication(RIEC),
Tohoku University

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2011 Organization Chart
2．Organization
Director

Advisory Council

Information Devices Division

Deputy Director
Research Divisions
FacultyCouncilBroadband Engineering Division

Human Information Systems Division

Systems & Software Division

Sponsored Division
Research Facilities

Ultrahigh-Speed Optical Communication
Applied Quantum Optics
Advanced Wireless Information Technology
Information Storage Systems
Ultra-Broadband Signal Processing
Basic Technology for Broadband Communication
Electromagnetic Bioinformation Engineering
Advanced Acoustic Information Systems
Visual Cognition and Systems
Ubiquitous Communications System
Multimodal Computing

Software Construction
Computing Information Theory
Communication Network
Information Contents
Information Social Structure
Environmental-Adaptive Information
and Communication Engineering
Atomically Controlled Processing
Semiconductor Spintronics
Nano-Molecular Devices
Nano-Spin Memory

Laboratory for Brainware Systems

Real-World ComputingIntelligent Nano-Integration System
Microarchitecture
New Paradigm VLSI System

Research Center for21st Century Information Technology

Project Planning Division
Technology Development Division:
Mobile Wireless Technology Group
Storage Technology GroupIntelligence Archive Group

Flexible Information System
Research Center
Fundamental Technology Center

Administration
OfficeNano-Photoelectronics
Quantum-Optical Information Technology
Solid State Electronics
Dielectric Nano-Devices
Materials Functionality Design
Magnetic Devices

Laboratory for
Nanoelectronics and Spintronics

Management Office for Safety and HealthCommon Research
Facilities

Chart

Machine Shop Division
Evaluation Division
Process Division
Software Technology Division
General Affairs Section
Cooperative Research Section
Library Section
Accounting Section
Purchasing Section

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3.RESEARCH ACTIVITIES

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2011 Information Devices Division
Targets and achievements of the Information Devices Division
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2011 Information Devices Division
Nanophotoelectronics

Exploring optical and electronic properties of nanometer-sized structures andtheir applications in photoelectronic devices
Nanophotoelectronics Yoichi Uehara, Professor[Research Target and Activities]
Our main interest lies in studying the physical and chemical
phenomena that take place in nanometer-scale regions and theirapplications in nanophotoelectronic devices. We investigate the material
properties of nanostructures through their optical responses to the local
excitation induced by electrons from the tip of a scanning tunnelingmicroscope (STM), as illustrated in Fig. 1. In this year, we have
Fig. 1 STM light emission
accomplished the ab-initio calculations of the dielectric functions ofspectroscopy
nanometer-scale domains of Ni(110)-(2x1) O surface. The theoreticalpredictions agreed well with the experimental results determined in 2010, showing that ourinterpretation on the origin of the dielectric properties are correct and that one can determine local
dielectric functions with nanometer–spatial resolution by STM light emission spectroscopy. STM
light emission spectroscopy combined with ps laser pulse irradiation to the STM gap was carried out
for Sb2Te3. Fine structures originating from phonon-electron interactions were found in the STM
light emission spectra, showing that one can investigate phonon properties with nanometer spatial
and ps temporal resolution by STM light emission spectroscopy. We are developing a spectroscopic
method having atomic spatial resolution in the THz spectral range. Surface phonon polaritons
become radiative through the breakdown of translational symmetry by the presence of the tip. Thus
strong THz emission is expected for STM light emission geometry. Functions of the prism in STM
light emission were investigated this year. It was found that the prism gives directivity to theemission even in the THz region. Theoretical analyses of observed STM light emission spectra are
crucial to determine local material properties from them. Classical theories of STM light emission
cannot treat the prism-coupled STM light emission. We have successfully applied the finite
differential time domain (FDTD) method, a numerical method for simulating electromagnetic
phenomena, to the prism-coupled configuration. Attenuated total reflection (ATR) is a powerful toolfor determining properties of thin films. Effects of roughness have scarcely been considered inanalyzing ATR spectra. We have developed an ATR theory including effects of roughness.
[Staff]
Professor
Yoichi, Uehara Dr.
Assistant Professor
Satoshi, Katano Dr.
[Profile]
Dr. Yoichi Uehara obtained his D. Eng. degree from the Department of Engineering, University ofOsaka prefecture in 1986, after which, he was initially appointed as an Assistant Professor at the
Research Institute of Electrical Communication, Tohoku University. He eventually became a Full
Professor at the institute in 2005. Dr. Uehara has worked on three main surface physics problems at
Tohoku University: (1) light emission from metal-insulator-metal and metal-oxide-semiconductor(MOS) tunnel junctions, (2) low-energy electron spectroscopy, and (3) light emission spectroscopy of
STM.
[Papers][1]

W. Iida, J. Ahamed, S. Katano, and Y. Uehara, “Mechanism of Prism-Coupled Scanning Tunneling Microscope Light
Emission”, Jpn. J. Applied Phys. 50, 095201 (2011).
S. Katano and Y. Uehara, “Nanoscale properties of single atoms and molecules investigated by scanning tunnelingmicroscope light emission spectroscopy”, OYO BUTURI 80, 960 (2011). (in Japanese)[2]

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Contact to Professor Yoichi Uehara：uehara@riec.tohoku.ac.jp

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2011 Information Devices Division
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Quantum-Optical Information Technology: Keiichi Edamatsu, Professor
Quantum Solid State Physics: Hideo Kosaka, Associate professor
Quantum Laser Spectroscopy: Yasuyoshi Mitsumori, Associate professor>5HVHDUFK7DUJHWDQG$FWLYLWLHV@Our goal is to develop the quantum information devices
utilizing quantum interaction between photons and electrons
in solids. In 2011, we have achieved (1) development of novel
entangled photon sources, (2) quantum media conversion fromphotons to electron spins in semiconductor quantum structures, and (3) development of heterodyne micro-pump-probe
spectroscopy of single quantum dots.
>6WDII@
Professor: Keiichi Edamatsu, Dr.
Associate Professor: Hideo Kosaka, Dr.
Associate Professor: Yasuyoshi Mitsumori, Dr.
>3URILOH@
Keiichi Edamatsu received B.S., M.S., and D.S. degrees inPhysics from Tohoku University. He was a Research Associate
in Faculty of Engineering, Tohoku University, a Visiting Associate in California Institute of Technology, and an Associate
Professor in Graduate School of Engineering Science, Osaka
University.

Fig. 1 Entangled photon generation using quasi-phase matchingand extended phase matching.

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y and PhD degree in ElecHideo Kosaka received B.S., M.S degrees in Physics from Kyoto University,
trical Engineering from Kyoto University.
y He was a Principal Researcher in NEC Opto-electronics andBasic Research Labs, a Visiting Associate in California University of Los Angeles.
Yasuyoshi Mitsumori received B.S., M.S. and D.S. degrees in Applied Physics from Tokyo Institute ofTechnology.
y He was a Research Fellow of the Japan Society for the Promotion of Science, a Researcher
in NTT Basic Research Laboratories, a Postdoctoral Fellow in Tokyo Institute of Technology,
y a Postdoctoral Fellow in Communications Research Laboratory,y a Research Associate in Research Instituteof Electrical Communication, Tohoku University.
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$SSO3K\V/HWW :8HQR).DQHGD+6X]XNL61DJDQR$6\RXML56KLPL]X.6XL]XDQG.(GDPDWVX³(QWDQJOHGSKRWRQJHQHUDWLRQLQWZRSHULRGTXDVLSKDVHPDWFKHGSDUDPHWULFGRZQFRQYHUVLRQ´2SWLFV([SUHVV  Contact to Professor Keiichi Edamatsu：eda@riec.tohoku.ac.jp

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2011 Information Devices Division
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Solid State Electroncis

Maki Suemitsu, Professor>5HVHDUFK7DUJHWDQG$FWLYLWLHV@
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extremely high carrier mobility, which is~100 times as high as that of silicon, makes
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the surface Si atoms from the SiC film (graphene-on-Si, or GOS, technology). We are currently working
on the clarification of the growth kinetics of the epitaxial graphene formation in GOS as well as on thedevelopment of graphene devices such as gas sensors, digital and RF field-effect transistors, andoptical devices using the GOS structure.
In FY2011, we discovered that we can, by tuning the crystallographic orientation of the Si
substrate as well as the growth condition, control the surface termination of the SiC film and theinterfacial structure at the graphene/SiC boundary after the graphene growth. This is a property
unique to GOS technology, which leads us to a feasible control of electronic structures of graphene.
Process technology for graphene-based field-effect transistors (GFETs) has also made several
progresses, which include observation of a cutoff frequency of 13 GHz for a GFET with a gate length of
3 Pm.

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>6WDII@Professor : Maki Suemitsu, Dr.
Assistant Professor : Hirokazu Fukidome, Dr.
Technical Assistant : Akemi Miura>3URILOH@
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Contact to Professor Maki Suemitsu：suemitsu@riec.tohoku.ac.jp

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2011 Information Devices Division'LHOHFWULF1DQR'HYLFHV5HVHDUFKRQ'LHOHFWULF 1DQR6FLHQFHDQG7HFKQRORJ\

Dielectric Nano-Devices

Yas
Ya
asuo Cho, Profefessor>5HVHDUFK7DUJHWDQG$FWLYLWLHV@Our main area of interest is evaluation anddevelopmentofdielectricmaterials,
includingferroelectric and piezoelectric materials and theirapplication to communication devices and ferroelectric
data storage systems. Our major contributions to
Fig.1 Digital bit data written on
advancement in these fields are the invention and theferroelectric single crystal with thedevelopment of ´6canning Nonlinear Dielectricareal recording density of 4 Tbit/inch2.
Microscopeµ 6NDM Zhich is the first successful purely
electrical method for observing the ferroelectric polarization distribution without the influence of theshielding effect by free charges and it has already been put into practical use. The resolution of the
microscope has been improved up to atomic scale-order. Therefore, it has a great potential for realizing
the ultra-high density ferroelectric recording system.
Major achievements of studies in 2011 are as follows: (1) Noncontact scanning nonlinear
dielectric microscopy (NC-SNDM) was applied to the observation of Si(111) reconstructed surfaces.
Images of the polarization distribution clearly distinguished disordered regions of the surface at theboundaries between the regular (77) domains. (2) Super-higher order nonlinear dielectric microscopy
was developed. W
We measured the 3rd and 4th harmonics of SNDM signals, and experimentally
clarified that the space resolution of SNDM images became higher according to increasing theharmonic numbers. (3) Charge accumulation in metal²oxide²nitride²oxide²semiconductor flash
memories was investigated by using SNDM. Images of the distribution of the stored charges inoxide-nitride-oxide films were obtained with high resolution and contrast by detecting the high-ordernonlinear permittivity.
>6WDII@
Professor 㸸 Yasuo Cho, Dr.
Visiting Professor 㸸 Koichiro Honda, Dr.
Assistant Professor 㸸 Yoshiomi Hiranaga, Dr.

Assistant Professor 㸸 Kohei Yamasue, Dr.
Technical Official 㸸 Yasuo Wagatsuma>3URILOH@
Yasuo Cho graduated in 1980 from Tohoku University in electrical engineering department. In 1985 hebecame a research associate at Research Institute of Electrical Communication Tohoku University. In
1990, he received an associate professorship from Yamaguchi University. He then became an associate
professor in 1997 and a full professor in 2001 at Research Institute of Electrical Communication
Tohoku University. During this time, his main research interests included nonlinear phenomena inferroelectric materials and their applications, research on the scanning nonlinear dielectric microscope,and research on using the nonlinear dielectric microscope in next-generation ultrahigh density
ferroelectric data storage (SNDM ferroelectric probe memory).
>3DSHUV@
[1]

[2]
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Contact to Professor Yasuo Cho：yasuocho@riec.tohoku.ac.jp

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2011 Information Devices Division
0DWHULDOV)XQFWLRQDOLW\'HVLJQ&RPSXWDWLRQDO'HVLJQRI)XQFWLRQDO0DWHULDOVIRU6SLQWRUQLFV'HYLFHV0DWHULDOV)XQFWLRQDOLW\'HVLJQ  0DVDIXPL 6KLUDL3URIHVVRU>5HVHDUFK7DUJHWDQG$FWLYLWLHV@
Our research targets are as follows: (1) theoretical analyses of quantum phenomena which appear inmaterials and nanostructures for advanced information devices, (2) computational design of materials
and nanostructures which possess new functionalities for improvement of device performance, and (3)development of new design procedures based on large-scale computational simulation techniques.
Our research activities in FY 2011 are as follows:(1) Temperaturepdependencepof magnetoresistancegin tunnel
jjunctions with half-metallic Heusler alloysy
We investigated the temperature dependence off tunnelingmagnetoresistance (TMR) in Co2MnSi/MgO/Co2MnSi junctions
on the basis of first-principles calculations [1]. We found thatthe tilting of interfacial Co spin moments resulting from thethermal fluctuations causes spin-flip scattering and reduces
the TMR significantly (Fig. 1). The insertion of ultrathin Fe or
FeCo layers into the interface enhances magnetic coupling andthus the TMR ratio at room temperature.

Fig. 1(2) Theoretical design
g of giant-magnetoresistaneggdevices with half-metallic Heusler alloysy

We investigated the spin-dependent transport properties of Co2MnSi/X//Co2MnSi (X = Ag, Au, Al, V,Cr) trilayers [3]. We found that the matching of the Fermi surface predominantly determines thespacer dependence of the interfacial resistance. In particular, MnSi-terminated interfaces with Ag, Au,
and Al spacers are promising for realizing larger magnetoresistance ratios.

>6WDII@
Professor : Masafumi Shirai, Dr.
Assistant Professor : Yoshio Miura, Dr.
Assistant Professor : Kazutaka Abe, Dr.
Research Fellow: Masahito Tsujikawa, Dr.
>3URILOH@
Masafumi Shirai was received the Doctor of Engineering degree from Osaka University in 1989.
From 1988 to 1996, he was a Research Associate, and then an Associate Professor at Osaka University.
y
From 2002 to the present, he has been a Professor at Tohoku University. Now his research interest is
focused on computational design of functional materials and device structures in spintronics.
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Contact to Professor Masafumi Shirai：shirai@riec.tohoku.ac.jp

2012/10/02

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2011 Broadband Engineering Division
3.2 Broadband Engineering Division: Research Target and Results
In order to establish the future broadband communication systems and novel devices
that are flexibly applied to the future ubiquitous ultra-large capacity information
communication, research and development are carrying out over the wide bands ofmicrowaves, millimeter/submillimeter waves, terahertz waves, and lightwaves withregardto the information

generation, transmission, processing andstoragetechnologies.
(1) Advanced Wireless Information Technology
Toward the realization of a ubiquitous and broad-band wireless network, we are
actively engaged in the research work on dependable and low power consumption
advanced wireless IT. We cover the whole technical fields from the lower to higher
layers, i.e., signal processing, RF/Mixed signal device, antenna, MODEM and network
technologies. We are also working for the next generation wireless communication
systems/devices which include a location / short message communication system via
quasi-zenith satellites (QZS) and a fusion of various wireless communication systems´dependable wireless system.µ(2) Ultra-Broadband Signal Processing
We are developing novel, integrated electron devices and circuit systems operatingin the terahertz region. One of our maMor concerns is a new material called ´grapheneµ, asingle-layered honeycomb-lattice carbon crystal.

We have developed new types ofhigh-performance gate-stack process technology for graphene-channel field-effecttransistors (G-FETs) featured by DLC (diamondlike carbon) or SiCN dielectric
insulators. This will open a new aspect of real-world operating ultrafast G-FETs.
We have also succeeded in development of record-breaking ultrahigh-sensitive
plasmon-resonant-type terahertz detectors featured with our original asymmetricdual-grating gate HEMT (high electron mobility transistor) structure. An extremelyhighresponsivityof

2.2KV/W

andanultralow

noise-equivalent-powerof

15p : +] have been achieved at 1 THz radiation at 300K.

(3) Ultrahigh-Speed Optical Communication

To achieve a global high-capacity optical network, we have been engaged in the
research on ultrahigh-speed Optical Time-Division Multiplexing (OTDM) transmission
and highly spectral-efficient coherent Quadrature Amplitude Modulation (QAM)
transmission.
This year, we successfully achieved 2.56 Tbit/s/ch transmission over 300 km, notable
improvements in 256~512 QAM transmission by digital back propagation and11

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2011 Broadband Engineering Division
frequency-domain equalization techniques, and 800 Gbit/s-225 km OTDM-RZ/32-QAM
transmission. Furthermore, we proposed a novel OTDM technique with an optical
Nyquist pulse train, which offers the possibility of ultrahigh-speed and ultrahigh
spectral efficiency simultaneously. Substantial improvement in dispersion tolerance
was demonstrated in 160 Gbaud transmission compared to conventional pulses.
(4) Applied Quantum Optics
Novel functional semiconductor photonic devices including photonic integrated
circuits are being investigated to explore new-generation photonic network systems.
It is confirmed that the carrier density change in the semiconductor laser cavity canbe reduced and low chirp intensity modulation with large response bandwidth can beachieved when semiconductor lasers are operated by injected intensity modulated
signal light. The study on optically controlled passive feedback semiconductor lasers(PFLs) is also being continued. It is confirmed numerically that the 3 dB bandwidth of
the PFL is enlarged to more than 50 GHz when the length of the external feedback
cavity is optimized. Based on the design, the PFL is fabricated and is now being verified
the effect of bandwidth enhancement experimentally.
(5) Information Storage Systems
High density data storage technology to store the large information is crucial tomeet the strong demand of rapid information increase in the network. Low power
consumption is another important performance.
We unveiled that areal density of 5 Tbit/inch2, which is tenfold of current density,
was difficult only by the bit-patterned media by theoretical approach with a computer
simulation. For such high density, we clarified thermal assist recording technique thatheats a narrow recording area is indispensable. Storage system technology to enhancethe data transfer rate was also developed.
(6) Basic Technology for Broadband Communication (Inutake Lab.)
Synthetic aperture radars (SAR) are useful for all-weather surveillance and rescue.
In this fiscal year we have developed various softwares for a real-time image, air-borne
SAR under the research contract with Ministry of Land, Infrastructure, Transport andTourism (MLIT). Hardware of a real-time imaging radar ´Live SARµ has beensuccessfully completed, with a high resolution (10 cm), small size and light weight (25kg) at Ku-band. Scientists and engineers of universities and industries collaborate on
the program.

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2011 Broadband Engineering Division
Research Laboratory of Ultrahigh-Speed Optical Communication

Advanced optical communication technologies approaching the Shannon limit
Research Area of Optical Transmission
Masataka Nakazawa, Professor
Toshihiko Hirooka, Associate Professor
Research Area of Optical Signal Processing
Research Area of High Accuracy Measurements using Optical Fibers
Masato Yoshida, Associate Professor[Research Target and Activities]
Nyquist(a) Nyquist
GaussianWith the vast growth of Internet traffic, it has
Disp. slope:-3
10
12.3 ps/nm
15.4 ps/nm
become increasingly important to realize a
18.5 ps/nm-410
high-capacity and high-speed network. This-5
laboratory aims to achieve a global ultrahigh-speed
10
optical network by engaging in the research of-6
10-7
ultrashort pulse generation and transmission.
(b) Gaussian
10-8This year, we successfully achieved 2.56
10
-9
10
Tbit/s/ch transmission over 300 km, notable-1010-34 -32 -30 -28 -26 -24 -22
improvements in 256~512 QAM transmission by
Received Optical Power [dBm]digital back propagation and frequency-domain(c)equalization techniques, and 800 Gbit/s-225 km Fig. 1 Dispersion tolerance in 160 Gbaud Nyquist
OTDM-RZ/32-QAM transmission. Furthermore, and conventional Gaussian pulse transmission. 
we proposed a novel OTDM technique with an
optical Nyquist pulse train, which offers the possibility of ultrahigh-speed and ultrahigh spectral
efficiency simultaneously. Substantial improvement in dispersion tolerance was demonstrated in 160
Gbaud transmission compared to conventional pulses as shown in Fig. 1.
[Staff]Distinguished Professor: Masataka Nakazawa, Dr. Associate Professor: Toshihiko Hirooka, Dr.
Associate Professor: Masato Yoshida, Dr.
JSPS Fellow: Keisuke Kasai, Dr.
[Profile]
Masataka Nakazawa received the Ph. D. degree from the Tokyo Institute of Technology in 1980. He
joined the Ibaraki Electrical Communication Laboratory, Nippon Telegraph & Telephone Public
Corporation. He was a visiting scientist at MIT in 1984-1985. In 2001, he became a Professor of the
Research Institute of Electrical Communication, Tohoku University, where he has been engaged inresearch on ultrahigh-speed optical communication including soliton transmission, nonlinear effects infibers, mode-locked lasers, and photonic crystal fibers. He was promoted to a Distinguished Professor
in 2008. He is currently the Director of the Institute.

Nyquist pulse
Gaussian pulse
Disp. slope:12.3 ps/nm2 2

Bit Error Rate

15.4 ps/nm2 2218.5 ps/nm2

Toshihiko Hirooka received the Ph. D. degree from Osaka University in 2000. From 2000 to 2002, he
was a Research Associate at University of Colorado at Boulder. He is currently an Associate Professor
at the Research Institute of Electrical Communication, Tohoku University. He has been engaged inresearch on ultrahigh-speed optical communications and nonlinear fiber optics.
Masato Yoshida received the Ph.D. degree from Tohoku University in 2001. In 2001, he joined the
Research Institute of Electrical Communication, Tohoku University, where he is currently an Associate
Professor. His research interests include mode-locked fiber lasers, coherent optical communication,and photonic crystal fibers.
[Papers][1@ P. Guan, T. Hirano, K. Harako, Y. Tomiyama, T. Hirooka, and M. Nakazawa, ´2.56 Tbit/s/chpolarization-multiplexed DQPSK transmission over 300 km using time-domain optical Fouriertransformation,µ Opt. Express, vol. 19, B56-B573, 2011.
[2] M. Nakazawa, T. Hirooka, P. Ruan, and P. Guan, "Ultrahigh-speed ´orthogonalµ TDM transmission with
an optical Nyquist pulse train," Opt. Express vol. 20, 1129-1140, 2012.
[3] K. Kasai, D. O. Otuya, M. Yoshida, T. Hirooka, and M. Nakazawa, ´Single-carrier 800-Gb/s 32 RZ/QAM
coherent transmission over 225 km employing a novel RZ-CW conversion technique,µ IEEE Photon. Technol.
Lett., vol. 24, 416-418, 2012.

Contact to Professor Masataka Nakazawa：nakazawa@riec.tohoku.ac.jp

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2011 Broadband Engineering Division
Applied Quantum Optics

Research on Innovative Highly Functional Photonic Semiconductor Devices
Highly Functional Photonics

Hiroshi Yasaka, Profefessor

10
000

6
60

800
40

f3dB [GHz]Feedback Length Lf[Pm][Research Target and Activities]
Novel functional semiconductor photonic devices including photonic integrated circuits arebeing investigated to explore new-generation photonic network systems.
Ultra-high-speed semiconductor photonic active devices are being investigated. It is confirmedthat the carrier density change in the semiconductor laser cavity can be reduced and low chirp
intensity modulation can be achieved when semiconductor lasers are operated by injected intensity
modulated signal light. The study on passive feedback semiconductor lasers (PFLs) is also being
continued. It is confirmed numerically that the 3 dB bandwidth of the PFL is enlarged to more than 50
GHz when the length of the external feedback cavity is set to ~ 170 Pm. Based on the design, the PFL
is fabricated and is now being verified the effect of bandwidth enhancement experimentally.
The study on highly functional semiconductor optical modulators is also being proceeded.
Experiment for multi-carrier generation by using a semiconductor Mach-Zehnder modulator is carriedout to realize compact multi-wavelength light sources (optical comb generators) applicable to dense
wavelength division multiplexing (DWDM) systems. By applying RF signal to the modulator, 7~9channels of optical frequency comb can be generated with channel peak power deviation of around 10
dB. Wavelength dependence of modulator's halff wavelength voltage (VS) becomes a problem when thesemiconductor Mach-Zehnder modulator is used in wide wavelength range and realizes "tunablewavelength optical comb generation". By adjusting the DC bias voltage applied to the modulator, samecomb spectra can be obtained in wide wavelength range from 1525 to 1560 nm.

600
400

20

200
0

0

1
0.5
0
5
Phase Difference [ S rad]0

Photo of functional semiconductor photonic device (left), schematic structure of passive feedback
semiconductor laser , PFL (middle), and calculated 3 dB bandwidth of the PFL as functions of feedback
length and phase difference between lasing mode and feedback light.

[Staff]
Professor � Hiroshi Yasaka, Dr.
[Profile]
Hiroshi Yasaka received M.S. degrees in physics from Kyusyu University in 1985, and Ph.D. degree
in electronic engineering from Hokkaido University in 1993. In 1985 he joined Nippon Telegraph andTelephone (NTT) Corporation. Since then, he has been engaging in research and development on
semiconductor photonic devices for optical fiber communication systems. From 2008 he has been aprofessor of Tohoku University.
[Papers][1] H. Ishihara, Y. Saito, W. Kobayashi, and H. Yasaka, "Bandwidth enhanced operation of single mode
semiconductor laser by intensity modulated signal light injection," to be submitted to IEICE Transactions
on Electronics.

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Contact to Professor Hiroshi Yasaka：yasaka@riec.tohoku.ac.jp

2012/10/02

9:06:02

2011 Broadband Engineering Division$GYDQFHG:LUHOHVV,QIRUPDWLRQ7HFKQRORJ\)RUUHDOL]DWLRQRIWKHQH[WJHQHUDWLRQPRELOHQHWZRUN
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7[ 0L[HU
7[ 6LJQDO+3$Toward the realization of a
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network, we are actively engaged in
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the research work on dependable
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advanced wireless IT. We cover the5[0L[HU'LJLWDO
whole technical fields from the+HWHURJHQHRXV'LJLWDOO\$VVLVWHG5)&KDQQHO(VWLPDWLRQ'LJLWDO5)6LJQDO3URFHVVLQJ
lower to higher layers, i.e., signal
6LJQDO3URFHVVLQJ
processing, RF/Mixed signal device,)LJ7KHWDUJHWV\VWHPRI
antenna, MODEM and network$GYDQFHG:LUHOHVV,QIRUPDWLRQ7HFKQRORJ\/DERUDWRU\technologies.
For the studies on signal
processing, RF/Mixed signal device and antenna technologies, we are developing millimeter wave RF&MO6 I&·s, antenna integrated -dimensional system in package (SiP) transceiver modules and,digital/RF mixed signal I&·s.
As for the studies on MODEM and network technologies, we are focusing on next generation mobile
broadband wireless access (MBWA: mobile broadband wireless access), dependable broadband wireless
local area network (WLAN) and ultra-broadband wireless personal area network (WPAN).
&KDQQHOVHOHFWRU&KDQQHOPHDVXUHPHQW
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GRPDLQHTXDOL]HU)'('HPRGXODWRU>6WDII@Professor: Noriharu Suematsu, Ph. D
Assistant Professor: Suguru Kameda, Ph. D
Research Fellow: Shoichi Tanifuji, Ph. D>3URILOH@
Noriharu Suematsu Prof. Suematsu received the M.S. and Dr. degrees in Electronics andCommunication Engineering from Waseda University in 1987 and 2000. From 1987 to 2010, he had
been with the R&D center of Mitsubishi Electric, Japan. Since 2010, he has been a professor of
Research Institute of Electrical Communication, Tohoku University. He received the OHM
technology award from the promotion foundation for electrical science and engineering in 2002 andPrize for Science and Technology, the Commendation for Science and Technology by the Minister of
Education, Culture, Sports, Science and Technology in 2009.
>3DSHUV@>@ 1 6XHPDWVX ³6L5),& WHFKQRORJLHV IRU PXOWLEDQG PXOWLPRGH ZLUHOHVV WHUPLQDOV´  &KLQD-DSDQ 0LFURZDYH
&RQIHUHQFH &-0: SS&KLQD$SULO ,QYLWHG.H\QRWH >@ 6.DPHGD+2JXPD1,]XND)<DPDJDWD<$VDQR<<DPD]DNL67DQLIXML16XHPDWVX77DNDJLDQG.
7VXERXFKL ³3URSRVDO RI KHWHURJHQHRXV ZLUHOHVV FRPPXQLFDWLRQ QHWZRUN ZLWK VRIW KDQGRYHU LQ DSSOLFDWLRQ OD\HU)HDVLELOLW\ VWXG\ EDVHG RQ ILHOG WULDO UHVXOWV´ WK ,QWHUQDWLRQDO ,&67 &RQIHUHQFH RQ &RJQLWLYH 5DGLR 2ULHQWHG:LUHOHVV1HWZRUNVDQG&RPPXQLFDWLRQV &52:1&20 2VDND-XQH
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FXUUHQW PRGH SLSHOLQH $'& LQ QP 6L&026 SURFHVV´  ,((( 0776 ,QWHUQDWLRQDO 0LFURZDYH :RUNVKRS6HULHVRQ,QWHOOLJHQW5DGLRIRU)XWXUH3HUVRQDO7HUPLQDOV ,0:6 .RUHD$XJXVW ,QYLWHG >@ 16XHPDWVX6<RVKLGD67DQLIXML6.DPHGD77DNDJLDQG.7VXERXFKL³*+]DQWHQQDLQWHJUDWHGWUDQVPLWWHUPRGXOH XVLQJ ' 6L3 WHFKQRORJ\ DQG RUJDQLF VXEVWUDWHV´ (XURSHDQ 0LFURZDYH &RQIHUHQFH (X0& 
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Contact to Professor Noriharu Suematsu：suematsu@riec.tohoku.ac.jp

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2011 Broadband Engineering Division,QIRUPDWLRQ6WRUDJH6\VWHP

5HVHDUFKRQ/DUJH&DSDFLW\,QIRUPDWLRQ6WRUDJH6\VWHP8VLQJ3HUSHQGLFXODU
0DJQHWLF5HFRUGLQJ Information Storage Systems: Hiroaki Muraoka, Professor
Recording Theory Computation: Simon J. Greaves, Associate Professor>5HVHDUFK7DUJHWDQG$FWLYLWLHV@
The amount of digital information is rapidly growing year by year, and wasestimated to exceed 1000 Exa-byte in 2010. An extremely large storage
capacity by high density magnetic recording is thus required. Novel
perpendicular magnetic recording is explored in order to continuously develop
the areal density of hard disk drives beyond the conventional density limit, i.e.,a near-future target of 1 Tbit/inch2 and ultimately exceeding 5 Tbit/inch2.
Theoretical studies including a micromagnetic computer simulation inassociation with an experimental approach are carried out to develop the next
generation of high density perpendicular recording devices.
As we have proposed, the magnetic nano-structure of recording media is
the most essential parameter to achieve high density perpendicular recording.
Bit-patterned media (Fig 1) are one promising candidate. Recently we haveclarified the possibility of an areal density of 5 Tbit/inch2 in conjunction withheat assisted recording.
In addition to the studies on magnetic recording, a novel low-power
consumption architecture was developed based on tiered operation of harddisk drives. (Fig. 2) A power reduction of 50% and high speed data transfer
were confirmed from our simulation work.

>6WDII@Professor: Hiroaki Muraoka, Ph.D. (since 2000)
Associate Professor: Simon J. Greaves, Ph.D. (since 2003)

Research Associate: Kenji Miura, Ph.D. (since 2003)
Secretary: Chie Watanabe
>3URILOH@
Hiroaki MURAOKA joined Tohoku University in 1991. Since then, he has been engaged in research on
high-density magnetic recording devices, systems and recording theories, mainly for perpendicularmagnetic recording. He received PhD degree in 1981. He is a Fellow of IEEE.
Simon J. GREAVES has been at Tohoku University since 2003. He uses micromagnetic simulations atmagnetic recording to investigate the potential of future storage devices. He received his Ph.D in 1993
from Salford University, UK.
 >3DSHUV@
[1] Kenji Miura, Eiji Yamamoto, Hajime Aoi, and Hiroaki Muraoka, ´Off-track error probability due to
track squee]e in shingled writing,µ J. Appl. Phys. Vol. 109, 0B3, Apr. 2011.
[2] Simon John Greaves, Hiroaki Muraoka, and Yasushi Kanai, ´The feasibility of bit-patterned
recording at 4 Tb/in2 without heat-assist,µ J. Appl. Phys. Vol. 109, 07B702, Apr. 2011.
[3] Koji Tsushima, Kenji Miura, Hiroaki Muraoka, ´Estimation of Magneti]ation Transition Width andShape by Inverse Reciprocity,µ IEEE Trans. Magn., Vol. 47, No. 10, pp. 3000-3003, Oct. 2011.

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Contact to Professor Hiroaki Muraoka：muraoka@riec.tohoku.ac.jp

2012/10/02

9:06:02

2011 Broadband Engineering Division
8OWUD%URDGEDQG6LJQDO3URFHVVLQJ
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We are developing novel, integrated electron devices and circuit systems operating in the terahertz(THz) region. Recent works and achievements are schematically shown in the above figures.

>6WDII@Professor: Taiichi Otsuji, Dr. Eng.
Associate Professor: Tetsuya Suemitsu, Dr. Eng.
Assistant Professor: Akira Satou, Dr. Eng.
CREST Researcher: Susumu Takabayashi, Dr. Eng.
JSPS Research Fellow: Stephane Albon Boubanga Tombet, Ph.D.

Secretary: Kayo UENO

>3URILOH@
Taiichi Otsuji: received the Dr. Eng. deg. from Tokyo Tech., Japan, in 1994. After working for NTT
Labs., Japan, since 1984, he joined Kyutech in 1999, as an Assoc. Prof., being a prof. from 2002. Since
2005, he has been a Prof. at RIEC, Tohoku Univ., Japan. Recipient of the Outstanding Paper Award of
the 1997 IEEE GaAs IC Symposium. Member of IEEE, OSA (senior), IEICE, and JSAP.
Tetsuya Suemitsu: received Dr. Eng. from Waseda Univ., Japan, in 2000. Research Scientist, NTT
Labs., Japan (1994- 2006); Visiting Scientist, MIT, USA (2002-2003); Assoc. Prof., Tohoku Univ., Japan(2006-). Recipient of the Best Paper Award, IEICE (2003), and the ELEX Best Paper Award, IEICE(2007). Member of IEEE, APS, JSAP, and PSJ.

>3DSHUV@>@ +.DUDVDZDHWDO-,QIUDUHG0LOOL7HUDKHUW]:DYHV9RO1RSS
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Contact to Professor Taiichi Otsuji：otsuji@riec.tohoku.ac.jp

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2011 Broadband Engineering Division%DVLF7HFKQRORJ\IRU%URDGEDQG&RPPXQLFDWLRQ+LJK5HVROXWLRQ6\QWKHWLF$SHUWXUH5DGDUIRU&LYLOLDQ$SSOLFDWLRQV


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Fig.1 (up) Logo of ´Live SARµ,(left) Antenna / gimbal
assembly (10 kg).



Fig.2 Graphical user interface.
Images can be gotten in fan-shaped area.

Inutake Laboratory : Masaaki Inutake, Professor>5HVHDUFK7DUJHWDQG$FWLYLWLHV@
We are developing an air-borne synthetic aperture radar (SAR) for civilian applications. The SAR
is useful for all-weather surveillance and rescue in disastrous fires and smokes. Scientists andengineers from both universities and industries collaborate on this research project.
Under the research contract with Ministry of Land, Infrastructure, Transport and Tourism (MLIT),a real-time imaging radar µLive SARµ , as shown inFig.1 was successfully completed in 2010, with ahigh resolution (10 cm), small size and light weight at Ku-band, and in 2011, soft wares for image
formation and user interface for ´Live SARµ has been developed, as shown inFig.2.
>6WDII@
Visiting Professor : Masaaki Inutake, Dr.
>3URILOH@
1966: Bachelor of Engineering, University of Tokyo.
1972: Doctor of Engineering, University of Tokyo.
1972-1974: Research Fellow, Institute of Space and Aeronautical Science, University of Tokyo.
1974-1980: Assistant Professor, Institute of Plasma Physics, Nagoya University
1980-1994: Associate Professor, Graduate School of Applied Physics, University of Tsukuba.
1994-2007: Professor, Graduate School of Engineering, Tohoku University.
2007-present: Visiting Professor, Research Institute of Electrical Communication, Tohoku University.
Researches: Alfven wave physics and its applications to the wave heating of a fusion plasma and theacceleration of supersonic plasma flows in a magnetic nozzle for an advanced space propulsion. Prizes
for Science & Technology (Research Category), Commendation for Science & Technology by the
Minister of Education, Culture, Sports, Science and Technology, (April, 2008).
>3DSHUV@

[1] M. Inutake, et al., Exhibition of ´Live SARµ, Risk Control in Tokyo, Tokyo Big Site, Oct. 19-21 (2011).
>@D. =hang and A. Mase, ´Experimental Study on Radar-Based Breast Cancer Detection Using UWBAntenna without Background Subtractionµ, Biomed. Eng.: Applications, Basis andCommunications 23, 5, 383-391
>@0:DWDQDEH&<RQH]DZD-,LVDNDDQG06DWR³$/263$/6$5IXOOSRODULPHWULFREVHUYDWLRQVRIWKH
,ZDWH0L\DJLQDLULNXHDUWKTXDNHRI´,QW-5HPRWH6HQVLQJ  

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Contact to Professor Masaaki Inutake：inutakem@riec.tohoku.ac.jp

2012/10/02

9:06:02

2011 Human Information Systems Division
Aims and Achievements of Human Information Systems Division
In order to realize advanced information communications systems, it is essential tounderstand and apply sophisticated information processing mechanisms of human being aswell as to establish communications environments in that human can communicate
anywhere, anytime without recognizing the communications tools. The aim of this division isto research and develop core and system technologies essential to advanced humanfriendly information and communications systems through understanding biologicalinformation generation mechanisms, human information processing mechanisms focusing
on acoustic and visual inputs, and optimizing the communications environments.
To achieve the goal of the Division, four laboratories have been carrying out
researches and developments in the following areas: (1) Electomagnetic Bioinformation
Engineering, (2) Advanced Acoustic Information Systems, (3) Visual Cognition and Systems,and (4) Ubiquitous Communications Systems.
The goals and achievements in the fiscal year 2011 of each laboratory are described indetail below.
(1) Electomagnetic Bioinformation Engineering(Aims) The aim of our division are to obtain the high accuracy sensor system for the signals
from the human body or electric devices and to obtain the system for approaching action to
the human body by using the nano-scale controlled magnetic materials and by thedevelopment of the devices under the functions of the magnetics.
(Achievements) We clarified the magnetic anisotropy of the magnetic thin film is the mostimportant factor to obtain the high sensitive magnetic sensors. We proposed a new method
to control the anisotropy by the difference of the thermal expansion constants, and we
studied about the mechanism. On the works about the observation of the high frequency
magnetic field distribution, we succeed to improve the special resolution and show thepossibility for observation of the field distribution around the magnetic recording heads. We
also worked on the magnetic actuator driven by external rotating field. Some kinds of
biomimetic actuators were proposed. In addition, the magnetic field driven wireless pump
was applied to use as the fully embedded ventricular assist device (artificial heart). The
possibility was confirmed by the animal test.
(2)Advanced Acoustic Information Systems(Aims) To realize future high-definition communication systems with rich and natural senseof presence, acoustic information processing technologies based on good knowledge ofhuman auditory system as well as multimodal perception relating to hearing are studied.
(Achievement) In 2011, we deepen the understanding human spatiotemporal perceptual
processes of audio-visual and audio-vestibular information. This is particularly important torealize future multi-modal information processing and communication systems. We clearly
demonstrated which multimodal factors affected the sense of presence and verisimilitude

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perceived by multimodal contents. Based on this knowledge, mathematical model of thesesenses was proposed. We continued to develop methods, such as virtual auditory displays
based on our accumulated knowledge of human auditory space perception, sensing andreproduction system based on High-order Ambinonics consisting of over 100 channels,
252-ch binaural spatial sound sensing system (SENZI). They are keenly required to realize
super-definition audio-visual communications in near future.
.
(3) Visual Cognition and Systems(Aims) Our goal is to understand the mechanisms of human visual perception in our brain to
improve the design of visual information display in the information & communication
technologies.
(Achievements) First, we have clarified a part of the neural basis for the shifts in visual
attention, which moves independent of the gaze. We measured a kind of brain wave called
steady-state visual evoked potentials (SSVEP), and analyzed changes in its amplitude andphase coherences, in comparison to the subject’s behavior. Our results implied that thesynchronization of neural activities in the visual cortex plays a significant role in the shifts invisual attention. Second, we have found that the mechanisms for depth perception are
based on a lower-level mechanism for motion detection in the retinal images. We have also
demonstrated that simple numerical models can predict the general trends of the effect ofcontrast, displacement and vertical shifts shown in behavioral data. Third, we studied thebinding mechanisms of color and motion information in human brain by using functional MRI
technique. We found that the color and motion signal related to our perception are alreadybound at as early as the second- and third- visual areas. However, it also became necessary
to study whether such a “bound” signal is yield by feedbacks from the higher order visualcortex or not.
(4) Ubiquitous Communications System(Aims) The goal of ubiquitous communications is to realize communications environmentsin that everybody can communicate with anybody, anywhere and anytime without
recognizing the communications tools. Towards this goal, the core technologies to realize
Super Broad Band Indoor Wireless Communications have been in research anddevelopment with which people can enjoy multiple Gbps transmission freely. In addition, awide area sensor network that also can work as a disaster relief network in the case of
emergency has been in research and development.
(Achievements) Major achievements in this year include (i) development of commerciallyapplicable 60 GHz beam-forming antennas for portable terminals, (ii) 60 GHz CMOS power
amplifiers, and phase shifters research and development close to commercially applicablelevel, (iii) improvement of indoor communications interruption probability by the factor of 10
leading to real Super Broad Band Indoor Wireless Communications deployment, (iv) a wide
area sensor network proposal and contributions to IEEE Standardization aiming atstandardization completion in FY2013.

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9:06:032011 Human Information Systems Division(OHFWURPDJQHWLF%LRLQIRUPDWLRQ(QJLQHHULQJ&RPPXQLFDWLRQZLWKKXPDQERG\
Electromagnetic Bioinformation Engineering, Kazushi Ishiyama, Professor
Electromagnetic Biomaterial Engineering, Shuichiro Hashi, Associate Professor>5HVHDUFK7DUJHWDQG$FWLYLWLHV@
We studied the mechanism of obtaining the magnetic anisotropy of the magnetic thin films for thesensitive magnetic sensors. We obtained a non-metal probe for high frequency magnetic field, andconfirmed the probe can measure the high frequency magnetic field with its phase information. In
addition, 3D position detecting system using magnetic markers was studied to improve its position
accuracy. The study about the magnetic actuator driven by the external magnetic field was carried out
for biomimetic robots using the rotational magnetic field, and small wireless pumps were obtained andclarified for their application for an artificial heart-support pump.

Fig.1 Sensitive magnetic field sensor

Fig. 2 Magnetic actuator for capsule-endoscope>6WDII@Professor: Kazushi Ishiyama, Dr.
Associate Professor: Shuichiro Hashi, Dr.
>3URILOH@
Kazushi Ishiyama received his MS and PhD degrees in Electrical Engineering from Tohoku University
in 1986 and 1993, respectively. His research interests are in the area of magnetics and magnetic
applications.
Shuichiro Hashi received the DE degree in Electrical Engineering from Tohoku University in 1998. His
research interests are in the area of magnetic measurement and magnetic materials.

>3DSHUV@[1] S. H. Kim, S. Hashi, and K. Ishiyama, ´A basic study of a triangular magnet chain for locomotion
control,µ -. App. Phys., 9ol. 109, pp. 07E318-07E318-3, (2011).
[2] S. Hashi, S. Yabukami, H. Kanetaka, K. Ishiyama, and K. I. Arai, ´Wireless Magnetic Position-Sensing
System Using 2ptimized Pickup &oils for Higher Accuracy,µ IEEE Trans. Magn., 9ol. 47, pp. 3542-3545,(2011).
[3] H. Nasuno, S. Hashi, and K. Ishiyama, ´Stroboscopic Technique for Measuring Magnetic-Field Waveforms Utilizing
Magneto-2ptical Effect,µ IEEE Trans. Magn., 9ol. 47, pp. 4011-4013, (2011).
>@ 6+.LP6+DVKLDQG.,VKL\DPD³$0HWKRGIRU$FTXLULQJWKH7RUTXHRID0DJQHWLF3XPS´,(((7UDQVDFWLRQVRQ0DJQHWLFV9RO1RSS  >@ 6 + .LP 6 +DVKL DQG . ,VKL\DPD ³0DJQHWLF 5RERWLFV $ %LRORJLFDOO\ ,QVSLUHG :DONLQJ 5RERW´ -RXUQDO RI
0DJQHWLF6RFLHW\-DSDQ9ROSS  Contact to Professor Kazushi Ishiyama：ishiyama@riec.tohoku.ac.jp

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9:06:032011 Human Information Systems Division
Advanced Acoustic Information Systems

Development of next generation communication systems
Advanced Acoustic Information Systems: Yôiti Suzuki, Professor
Acoustic Information Communications: Yukio Yukio, Associate Professor
Auditory and Multisensory Information Systems: Shuichi Sakamoto, Associate Professor[Research Target and Activities]
The main interest of this laboratory is a study of theinformation processing in the human auditory system.
We are, at the same time, aiming at the realization of aW
'comfortable' sound environment exploiting digital
signal processing techniques. Three-dimensional soundimage control by high-definition virtual auditory
displays based on simulating transfer functions ofsound paths from sound sources to listeners' external
ears, and a sound field simulator based on precise
sound field analysis and control are two examples.
foror training spatial
These systems are expected to provide a high-quality Fig. 1 Application fo
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3D virtual sound space, which is keenly required toauditory display
realize in the multimedia communications, cyberspacesystems and supre-definition audio-visual display
systems. Moreover, in 2011, we put a lot of efforts to investigate the spaciotemporal integration processof multisensory information processing.
[Staff]
Professor: Yôiti Suzuki, Dr., Associate Professor: Yukio Iwaya, Ph.D., Shuichi Sakamoto, Ph.D.
Technical Official: Fumitaka Saito, Research Fellow: Zheng Lie Cui, Ph.D., Takuma Okamoto, Ph.D.,
Akio Honda, Ph.D., Hiroshi Shibata, Ph.D.
[Profile ]Yôiti Suzuki graduated from Tohoku University in 1976 and received his Ph. D. degree in electricaland communication engineering in 1981. His research interests include psychoacoustics and digital
signal processing of acoustic signals. He served as a president of the Acoustical Society of Japan from¶05 to ¶07. He is a fellow of the Acoustical Society of America.
Yukio Iwaya graduated from Tohoku University in 1991 and received his Ph. D. degree in information
sciences in 1999. His research interests include three-dimensional acoustic space perception anddevelopment of its communication systems with high sense of presence.
Shuichi Sakamoto graduated from Tohoku University in 1997 and received his Ph. D. degree inelectrical and communication engineering in 2004. His research interests include human auditory andmultisensory information processing and development of advanced multimodal information systems.
[Papers]x Takuma Okamoto, et al., ´Wide-band dereverberation method based on multichannel linear prediction
using prewhitening filter,µ Applied Acoustics, 73(1), 50-55 (2012)
x Junfeng Li, et al., ´Two-Stage Binaural Speech Enhancement with Wiener Filter (TS-BASE/WF) for
High-Quality Speech Communication,µ Speech Communication, 53(5), 677-689 (2011)
x K. Asakawa, et al., ´Audio-visual synchrony perception of simplified speech sounds heard as speech andnon-speech,µ Acoustical Science and Technology, 32(3), 125-128 (2011)22

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2011 Human Information Systems Division
Visual Cognition and Systems Laboratory

Understanding human visual system for the better communication with visual
information
Visual Cognition and Systems: Satoshi Shioiri, Professor
Cognitive Brain Functions: Ichiro Kuriki, Associate Professor[Research Target and Activities]
Our target is to understand the vision-related brain functions in order to apply the knowledge torealize human oriented information communication systems. We made achievements in the fields ofvisual attention, depth perception and color vision mechanisms. (1) We developed a technique toinvestigate the time course of visual attention by measuring steady-state visual evoked potentials(SSVEPs) to the flickering stimuli and compared with behavioral performance. The measurementssuggested that phase coherence, rather than amplitude gain, determined the behavior. (2) We modeled
two mechanisms for motion in depth based on motion/disparity energy detection. Model simulation
predicted the general trends of the effects of contrast, displacement and vertical shift shown in thedata. This suggests the physiological plausibility of the energy-based model of motion in depth. (3) We
investigated the neural representation of color in human visual cortex by measuring brain activity byfunctional MRI technique and analyzed it with multi-voxel- pattern- classification analysis.

2012)

Satoshi Shioiri: Professor Shioiri graduated Tokyo Institute of Technology and received Dr. Eng in 1986. He was a postdoctoral researcher atUniversity of Montreal until May, 1989, and was a research fellow at Advanced Telecommunications Research Institute from June of 1989 toApril of 1990. He joined Chiba University at May of 1990, as an assistant professor, an associate professor, and a professor. He has been aprofessor of Research Institute of Electrical Communication of Tohoku University, since May, 2005.
Ichiro Kuriki:

Dr. Kuriki received Ph.D. from Tokyo Institute of Technology in 1996. He worked for Tokyo Institute of Technology (-1998) andthe University of Tokyo (-2000) as a research associate before joining Communication Science Laboratories of NTT Corporation as a researcher.
From January 2006, he joined the Research Institute of Electrical Communication, Tohoku University as an Associate Professor.

[Papers][1] Control of subjective depth on 3-D displays by a quantified monocular depth cue. Journal of the SID 19/1, pp. 1-8,
(2011). Takahashi S, Ishikawa T, Hyodo Y, Ohashi I, Shimpuku Y, Matsubara K, Matsumiya K, and Shioiri S[2] Time courses of attentional modulation in neural amplification and synchronization measured with steady-state visualevoked potentials. Journal of Cognitive Neuroscience (2012). Kashiwase Y, Matsumiya K, Kuriki I, and Shioiri S.
[3] Decoding color responses in human visual cortex, IEICE Trans. Funcamentals Vol. E94-A (2) pp. 473-479(2011).
Kuriki, I., Nakamura, S., Sun, P. Ueno, K., Matsumiya, K., Tanaka, K., Shioiri, S. and Cheng, K.

Contact to Professor Satoshi Shioiri：shioiri@riec.tohoku.ac.jp

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2011 Human Information Systems Division
8ELTXLWRXV&RPPXQLFDWLRQV6\VWHP

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
Shuzo Kato, Professor
Hiroyuki Nakase, Associate Professor>5HVHDUFK7DUJHWDQG$FWLYLWLHV@�Research Target�
The goal of ubiquitous communications is to provide communications environments in which
everybody can communicate with anybody, anywhere and anytime without paying attention on thecommunications tools much. In order to realize this goal, the laboratory has been working on coretechnology research and development on Super Broadband Wireless Communications in which people
can communicate at multi-Gbps freely.
�FY2011 Major Results�
A Beam forming module is developed successfully, that is ready for commercialization to realize Super
Broadband Wireless Communications in 60GHz. The developed beam-forming RX module is shown in
Fig.1 and its antenna directivity in Fig.2. Also ISWAN (Integrated Services Wide Area Wireless
Networks) at 0.9 / 2.4GHz bands has been proposed to IEEE802.15.4K. The image of ISWAN is shownin Fig.3 aiming to be used for a disaster-relief network in case of emergency as well.
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Fig. 1 Beam-forming Rx module Fig. 2 Antenna directivity of Rx module
Fig.3 ISAWAN image
>6WDII@
Prof.: Shuzo Kato, Ph.D, Associ. Prof: Hiroyuki Nakase, Ph. D. Assis Prof.: Hirokazu Sawada, Ph. D.
Technical staff: Lawrence Materum, Shigeru Yoshimiya, Technical assistant: Naomi Aizawa
>3URILOH@
Shuzo Kato A Manager, Researcher and Engineer having a successful broad range of experiencesfrom R&D, Manufacturing, Quality management, Product planning, Marketing, Sales, HRs in Japanand USA. Recently working on millimeter wave communications systems and its global( IEEE)
standardization lead. Graduated from Faculty of Engineering, Tohoku University with Ph. D in 1977,
Published over 200 technical papers and held over 90 patents (including the one that became
Department of Defense (USA) standard in 1998), Fellow of the IEEE and IEICE Japan.
Hiroyuki Nakase graduated from Faculty of Engineering, Tohoku University with Ph. D in 1995.
From 1995, he worked at NTT Research Laboratories. Since 1999, he has been with RIEC, Tohoku
University working on 60GHz CMOS MMICs for super broadband wireless communications andapplications.
>3DSHUV@
[1] K.Iigusa, H.Harada, S.Kato, J.Hirokawa, and M.Ando, "Periodically Loaded Straight Wires for Radio
Wave Transmission Control", IEEE Trans. on Antennas and Propag., VOL. 59, NO. 1, JANUARY 2011.
[2] L.Materum, S.Kato, H.Sawada,´Channel Measurements for Short Range Beam Tracking/Switching
Systems,µFrE1-1, ISAP2011, Oct. 25-28, 2011, Jeju, Korea.
[3] Y.Sato, K.Fujita, H.Sawada, H.Nakase, S.Kato, "A Millimeter-wave 8-element Double Slot Array
Antenna for High Gain Beam-forming," GSMM2011, May 23-25, 2011, Espoo, Finland.

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Contact to Professor Shuzo Kato：shukato@riec.tohoku.ac.jp

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2011 Systems & Software Division
Research Targets and Activities of Systems & Software Division

The goal of System & Software Division is to realize Ubiquitous environment. In an ideal
ubiquitous environment, everyone can communicate with anybody, anywhere, with any kindof information, at any time, freely and in real time. Our division has the following fiveresearch fields related to such high-level system, software and contents by integrating
computer and communication:― Software Construction: Reliable and high-level software.
― Computing Information Theory: Fundamental theory of new software.
― Communication Network: Symbiotic computing.
― Information Content: Technologies for interactive content.
― Structure of Information Society (Visitor Section).
An overview of research results from Apr. 2010 to Mar. 2011 of these fields except the visitor
section is described in this section.

(1) Software Construction

We have been researching on theoretical foundations for flexible yet reliable
programming languages, and have been developing SML#, a new programming languagein the ML family, that embodies some of our research results. The major results of 2011
academic year include the following. (1) Theoretical foundations for parallel tree
operations: We have developed a systematic method of developing efficient parallel tree
operations based on a theory of parametric polymorphism. (2) Development of the SML#
Compiler: A major progress of the last year's development is design and implementationof a true separate compilation scheme and its interface language. We have also released
SML# 0.90, which includes the separate compilation system.
(2) Computing Information Theory
Aiming at combining program transformation methods and automated theorem proving
methods, we continued to pursue the possibility of program transformation by templates
based on term rewriting. Based on a notion of natural higher-order inductive theorems, we
showed sufficient criteria for applying transformation templates to higher-order programs.
Although many automated termination provers have been proposed recently, little work isreported on automated confluence provers. We continued to develop an automated confluence
prover ACP for term rewriting systems based on several divide-and-conquer methods.
Applying the persistency and the decreasing diagram method, we implement a new method
for proving confluence of term rewriting systems.

(3) Communication Network
A measurement function of agent’s behavioral property is designed and implemented25

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2011 Systems & Software Division
based on the repository-based multiagent framemwok. A method of accumulating the
distributed network information using Active Information Resource, and an infrastructure ofagent-based network management system are proposed and evaluated through the simulation
experiment and the implementation of a prototype system. Moreover, the advanced
applications for intelligent distributed environment such as an agent -based sensor network
for realizing the Smart-home and a knowledge-based electric power control method ofmultiagent-based microgrid, had been developed and demonstrated.

(4) Information Content
We focus on non-traditional contents other than movies, music and games, conducting
comprehensive research on a variety of interactive content which creates new value throughinteractions with humans. This year we mainly conduct research projects on direct
multi-touch interaction on a stereoscopic tabletop display, multi-touch elastic scroll and zoom
techniques with content distortion, seamless interaction using a handheld projector in aperspective corrected multi-display environment, investigate of relationship between qualityof inter-personal communication and content by using a media-space which consists of wall
displays, floor displays, movable displays, audio speakers, and so on.

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2011 Systems & Software Division
Software Construcution

Foundations for Developing High-level and Reliable Programming Languages
Software Construction Atsushi Ohori, Professor
Type Inference[Research Target and Activities]
Today's software systems are becoming more and more complicated
SML# Program
due to the need of integrating various computation resources available
in the Internet. A key to control the complexity and to enhance thereliability of such a system is to develop a high-level programming
Type-safe FFIPolymorphic Records
language that can directly represent various resources andautomatically detect potential inconsistencies among the components
OS, C Libraries
in a system. Based on this general observation, our research aims at
Databases
establishing both firm theoretical basis and implementation method
for flexible yet reliable programming languages for advanced
SML#: a high-level and reliable language
applications. Research topics on theoretical foundations include:
logical foundations for compilation, verification of low-level code, and type-directed compilation forpolymorphic languages. We are also developing a new practical ML-style programming language,
SML#, which embodies some of our recent results such as record polymorphism, rank-1 polymorphism,and high-degree of inter-operability with existing languages and databases.
The major results of 2011 academic year include the following. (1) Theoretical foundations for parallel
tree operations: We have developed a systematic method of developing efficient parallel tree operations
based on a theory of parametric polymorphism. (2) Development of the SML# Compiler: In the lastyear, we developed the following methods and components. (i) Native thread support for POSIX
threads. (ii) A true separate compilation scheme for ML and its interface language. We also havereleased a pre-release of fully functional version of the SML# compiler, which is a separate compilation
system with all of our past development such as database integration.

[Staff]
Professor ： Atsushi Ohori, Dr.
Assistant Professor ： Katsuhiro Ueno, Dr.
Assistant Professor ： Akimasa Morihata, Dr.
[Profile]
Atsushi Ohori Professor Atsushi Ohori was born in 1957. He received his BA degree in Philosophy
from University of Tokyo, 1981; received his MSE degree in Computer and Information Science from
University of Pennsylvania, 1986; and received his Ph.D. degree in Computer and Information Sciencefrom University of Pennsylvania, 1989. He worked for Oki Electric Industry as a programmer, aresearcher and a senior researcher from 1981 until 1993. From 1989 until 1990, he spent one year in
University of Glasgow as a postdoctoral research fellow funded by Royal Society Research Fellowship.
In 1993, he joined Research Institute for Mathematical Sciences, Kyoto University as an Associate
Professor. In 2000, he joined Japan Advanced Institute of Science and Technology as a Professor. In
2005, he moved to RIEC, Tohoku University as a Professor.
[Papers][1] A. Morihata and K. Matsuzaki. Balanced trees inhabiting functional parallel programming. In Proc.
the 16th ACM International Conference on Functional Programming, pp.117-128, 2011.
[2] K. Ueno, A. Ohori, and T. Otomo. An efficient non-moving garbage collector for functional languages.
In Proc. the 16th ACM International Conference on Functional Programming, pp.196-208, 2011.
[3] A. Ohori and K. Ueno. Making Standard ML a practical database programming language. In Proc.
the 16th ACM International Conference on Functional Programming, pp.307-319, 2011.

Contact to Professor Atsushi Ohori：ohori@riec.tohoku.ac.jp

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2011 Systems & Software Division
Computing Information Theory

Towards a New Software Paradigm Arising from Computation and Proof
Computing Information Theory Yoshihito Toyama, Professor
Takahito Aoto, Associate Professor
Computing logical system[Research Target and Activities]
We are working on the development of a new software paradigm that arises from computation andproof. For this, we focus on a rewriting formalism which offers both flexible and effective reasoning
with equations. In the rewriting formalism, proofs by equational reasoning and computations by
rewriting systems can be combined in a unified framework (see the figure above). We aim at applying
our new paradigm to the development of formal techniques for construction and verification of reliable
software. We are currently working on rewriting theories for termination, confluence, programtransformation, and program verification. Recent research activities include higher-order rewriting
systems, automated inductive theorem proving, combination of functional-logic languages andautomated theorem proving systems.

[Staff]
Professor ：Yoshihito Toyama, Dr
Associate Professor ：Takahito Aoto, Dr
Assistant Professor ：Kentaro Kikuchi, Dr[Profile]
Professor Toyama Yoshihito Toyama was born in 1952. He received his B.E. from Niigata University
in 1975, and his M.E. and D.E. from Tohoku University in 1977 and 1990. He worked as a Research
Scientist at NTT Laboratories from 1977 to 1993, and as a Professor at the Japan Advanced Instituteof Science and Technology (JAIST) from 1993 to 2000. Since April 2000, he has been a professor at the
Research Institute of Electrical Communication (RIEC) of Tohoku University. His research interests
includes term rewriting systems, program theory, and automated theorem proving.
Associate Professor Takahito Aoto Takahito Aoto was born in 1969. He received his M.S. and Ph.D.
from Japan Advanced Institute for Science and Technology (JAIST). He was at JAIST from 1997 to
1998 as an associate, at Gunma University from 1998 to 2002 as an assistant professor, and at Tohoku
University from 2003 to 2004 as a lecturer. He has been in Tohoku University from 2004 as an
associate professor. His current research interests include rewriting systems, automated theorem
proving, and foundation of software.
[Papers][1] Takahito Aoto, Toshiyuki Yamada and Yuki Chiba, Natural inductive theorems for higher-order rewriting, In Proceedings of the
22nd International Conference on Rewriting Techniques and Applications (RTA 2011), LIPIcs, Vol.10, pp.107-121, 2011.
[2] Takahito Aoto and Yoshihito Toyama, Reduction-preserving completion for proving confluence of non-terminating term rewriting
systems, In Proceedings of the 22nd International Conference on Rewriting Techniques and Applications (RTA 2011), LIPIcs,
Vol.10, pp.91-106, 2011.

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Contact to Professor Yoshihito Toyama：toyama@nue.riec.tohoku.ac.jp

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2011 Systems & Software Division
Communication Network

Support of Cooperation and Communication between Human and Systems

Intelligent Communication

Tetsuo Kinoshita, Professor[Research Target and Activities]
In this year, the following studies had been done. (a) Evolutional Agent Systems: A measurement
function of agent’s behavioral property is designed and implemented by using Repository-based
multiagent framemwok. (b) Agent-based Network Management Technologies: A method ofaccumulating the distributed network information using Active Information Resource, and an
infrastructure of agent-based network management system are proposed and evaluated based on thesimulation experiment and the implementation of a prototype system (AIR-NMS). (c) Multiagent
applications: The advanced applications for intelligent distributed environment had been studies, forinstance, a knowledge-based electric power control method of multiagent-based microgrid, a method of
supporting accumulation and integration of distributed information resource, and an agent-based
sensor network for realizing the Smart-home. These results are published as 14 papers of bothinternational journals and international conference proceedings.

[Staff]
Professor: Tetsuo Kinoshita, Dr.
Assistant Professor: Hideyuki Takahashi, Dr.
[Profile]
Tetsuo Kinoshita received the B.E. degree in electronic engineering from Ibaraki University, Japan, in
1977, and the M.E. and Dr.Eng. degrees in information engineering from Tohoku University, Japan, in
1979 and 1993, respectively. His research interests include agent engineering, knowledge engineering,knowledge-based systems and agent-based systems. He received the IPSJ Research Award, the IPSJBest Paper Award and the IEICE Achievement Award in 1989, 1997 and 2001, respectively. Dr.
Kinoshita is a member of IEEE(SM), ACM, AAAI, IEICE(Fellow), IPSJ(Fellow), and JSAI.
[Papers][１] Akiko Takahashi, Tetsuo Kinoshita, "Configuration and control design model for an agent based Flexible
Distributed System", International Journal of Web Intelligence and Agent Systems, Vol.9, No.2,
pp.161–178, IOS Press, 2011.4.
[2] Takahiro Uchiya, Hideki Hara, Kenj Sugawara, Tetsuo Kinoshita, “Repository-Based Multiagent
Framework for Developing Agent Systems”, in Y. Wang (Ed.), Transdisciplinary Advancements in
Cognitive Mechanisms and Human Information Processing, Ch.4, pp.60-79, IGI Global, ISBN
9781609605537, EISBN13: 9781609605544, 2011.5.
[3] Kazuto Sasai, Johan Sveholm, Gen Kitagata and Tetsuo Kinoshita, “A Practical Design and
Implementation of Active Information Resource based Network Management System”, Int. J. Energy,
Information and Communication, Vol.2, N.4, pp.67-86, 2011.11.

Contact to Professor Tetsuo Kinoshita：kino@riec.tohoku.ac.jp

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2011 Systems & Software Division,QIRUPDWLRQ &RQWHQWV

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Good media content has the power to enrich ourlives. The effectiveness of content delivery is
becoming more and more important in a wide
variety of fields, such as industry, education,
culture, entertainment, and so on. Expectationsof its use in the general public are also
increasing. We focus on non-traditional contents
other than movies, music and games, conducting
comprehensive research on a variety ofinteractive content which creates new value
through interactions with humans. This year we
mainly conduct research projects on direct
multi-touch interaction on a stereoscopic
tabletop display,
y multi-touch elastic scroll andzoom techniques with content distortion,
media-space for enhancing inter-personalcommunication, and so on.
>6WDII@
Professor: Yoshifumi Kitamura, Dr.
Assistant Professor: Kazuki Takashima, Dr.
Research Fellow: Hitomi Yokoyama, Dr.

3URIHVVRU

Fig. 1: Direct multi-touch interface on
stereoscopic tabletop display

Fig. 2: Novel multi-touch interface with content
distortion>3URILOH@
Yoshifumi Kitamura received B.Sc., M.Sc. and PhD. degrees in Engineering from Osaka University in
1985, 1987 and 1996, respectively. From 1987 to 1992, he was at the Information Systems ResearchCenter of Canon Inc. From 1992 to 1996, he was a researcher at the ATR Communication Systems
Research Laboratories. From 1997 to 2002, he was an Associate Professor at the Graduate School ofEngineering and Graduate School of Information Science and Technology,
y Osaka University. Since
April 2010, he has been a Professor at the Research Institute of Electrical Communication, Tohoku
University.
y He is a fellow of the Virtual Reality Society of Japan.
>3DSHUV@>@ Kosuke Nakajima, Yuichi Itoh, Takayuki Tsukitani, Kazuyuki Fujita, Kazuki Takashima,
Yoshifumi Kitamura, Fumio Kishino: FuSA2 touch display: furry and scaleble multi-touchable
display, In Proc. Interactive Tabletops and Surfaces (ITS), pp. 35-44, Nov. 2011
>@ Kazuyuki Fujita, Yuichi Itoh, Hiroyuki Ohsaki, Naoaki Ono, Keiichiro Kagawa, Kazuki
Takashima, Sho Tsugawa, Kosuke Nakajima, Hayashi Yusuke, Fumio Kishino: Ambient Suite:enhancing communication among multiple participants, In Proc. Advances in ComputerEntertainment Technology (ACE), pp. 25:1-25:8, Nov. 2011.
>@ Sho Tsugawa, Hiroyuki Ohsaki, Yuichi Itoh, Naoaki Ono, Keiichiro Kagawa, Kazuki
Takashima, Makoto Imase: Quasi-realtime social network construction with heterogeneous
sensors in ambient environment, In Proc. Advances in Computer Entertainment Technology(ACE), pp. 75:1-75:2, Nov. 2011.

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9:06:05

2011 Systems & Software Division,QIRUPDWLRQDQG6RFLDO6WUXFWXUH'\QDPLFDQG$XWRQRPRXV&RQWURORI 3RZHU6\VWHPV>5HVHDUFK7DUJHWDQG$FWLYLWLHV@Life is an intrinsic part of nature. To be both pliant and sturdy in a complex environment requires anautonomy that is capable of creating the information needed to control the self. To ´liveµ a life system
must on its own form a harmonious relationship with an unpredictably changing environment. It
requires that it be capable of creating the information necessary for its own self-control. It is thisautonomy that clearly distinguishes the world of life systems from the physical world, which indicatesthe necessary for the interdisciplinary studies on the world of life systems.
.

.

The unit commitment (UC) problem is strongly related to operations for a lot of systems, especiallypower systems. Many solutions have been extensively investigated. Conventional methods have been
based on forecasted scenarios and have not been dynamic or autonomous. Distributed generation
systems such as micro-grid systems have recently attracted attention because they help to preserve theglobal environment. These systems require dynamic and autonomous control because most of them use
natural energy that changes unexpectedly and numerous units have to be controlled. However, as
conventional methods are not dynamic or autonomous, we propose a new control to the UC system
without any forecasted scenarios. We confirmed through computer simulations that our proposed
method was able to dynamically and autonomously adapt to sudden environmental changes. The
method was also confirmed to be robust and scalable while achieving almost optimal conditions of UC
problem.

>6WDII 3URILOH@
Visiting Professor: Masafumi Yano, Ph.D.
1992-: Professor, Research Institute of Electrical Communication (RIEC), Tohoku University.
y2007-: General Director, Research Institute of Electrical Communication (RIEC), Tohoku University.
y2010-: Professor Emeritus of Tohoku University and also Research Professor of RIEC
>3DSHUV@>@ -XPSHL 0DWVXPRWR <RVKLQDUL 0DNLQR +DUXNL 0LXUD 0DVDIXPL <DQR   ³$ FRPSXWDWLRQDO PRGHO RI WKHKLSSRFDPSXV WKDW UHSUHVHQWV HQYLURQPHQWDO VWUXFWXUH DQG JRDO ORFDWLRQ DQG JXLGHV PRYHPHQW´  %LRO&\EHUQ
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0DVDIXPL <DQR  ³&KDQJH-DSDQ´ 0RQRJUDSK  (+(6&3XEOLVKLQJ

Contact to Professor Masafumi yano：masafumi@riec.tohoku.ac.jp

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2011 Systems & Software Division,QIRUPDWLRQ6RFLDO 6WUXFWXUH'LVDVWHURULHQWHG6WURQJ *UHHQ,&7IRU+XPDQV¶ /LIHDQG1DWXUH³6\PELRVLV´6RFLHW\>5HVHDUFK7DUJHWDQG$FWLYLWLHV@$FFHSWDQFHRI'LYHUVLW\
Q R
In 21st century, we are facing with ´global
environmental changesµ including global warming ,QGHSHQGHQFH6XSSRUW
5HFRYHU\
䠘3ROLWLFV䠚*UHHQ(QYLURQPHQW
and ´social structural changesµ such as aging of
5HJHQHUDWLRQ
the population. For absorbing and sublating these
5HFLSURFLW\(QHUJ\6DY
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changes, we proposed a new computation
6FLHQFH䞉7HFKQRORJ\
H± +DUPRQL]DWLRQ䠋6\PELRVLV±
paradigm, the concept of ´Symbiotic computingµ, +HDOWK
6 HUYLVLR
6XSHUYLVLRY V RQRQ
5HJLRQDODQG6RFLDOLD
0XWWXDOin 1992. This idea places on values on harmony&&RQIOLFWV$VVLVWDQFH
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between ´Agentsµ (e.g. human, computer, internet,
robot, nature, country,
y culture and etc.). From theengineering point of view, we have been pursuing$FFHOHUDWLRQRI'HPRJUDSKLF $JLQJ'HPRJUDSKLF$JLQJ
researches on the ´Symbiotic computingµ which'LVDVWHUU
DQG'HVWUXFWLRQRIHVWUXFWLRQRI
are its model, design and applications (Fig.1).
*OREDO(QYLURQPHQWEDO(QYLURQPH
DO(QYLURQPH/RVV RI 6RFLDO 0RGHO/RVVRI6RFLDO0RGHO/HOO
In 2011, we have conducted a cooperative project
0DUNHW0HFKDQLV0DUNHW0HFKDQL
0DUNHW0HFKDQLVP
6RFL
6RFLDOLVP
6RF
called the ´Green ICT Innovation Promotion(PREDICT)µ based on the idea of ´Symbiotic
Fig.1: Model of Symbiotic Information Society
towards Recovery and Regeneration
Computing.··<Green ICT Innovation Promotion (PREDICT)>: In thisproject, Professor Norio Shiratori investigates the world·s first ´Green-oriented Never Die Network
0anagement Technologyµ that achieves greening (reduction of CO2 emissions by power saving) of theentire information system and high disaster tolerance at the same time. It is funded by The Ministry ofInternal Affairsfand Communications, Japan (2011-2014).
Our project goal is to reduce CO2 emission up to 10-30% during normal operation per information
system, and to construct the infrastructure of information and communication systems withfault-tolerance in the event of a natural disaster, by effectively configuring wired and wirelessnetworks. We
W also propose G-MIB (Green-oriented Information Base) to collect and control information
to express working status of PCs effectively for energy saving of the entire information system.
Through the research development, we are considering international standardization of our proposed
information base.
>6WDII@
Professor: Norio Shiratori, Dr.
Secretary: Midori Horino>3URILOH@
Prof. Shiratori was bone in 1946 in Miyagi Prefecture. He received his doctoral degree from Tohoku
University in 1977. He is currently a Professor at RIEC. Before moving to RIEC in 1993, he was theProfessor of Information Engineering at Tohoku University from 1990 to 1993. Prior to that, he served
as an Associate Professor and Research Associate at RIEC. He received IEEE Fellow in 1998, IPSJ
Fellow in 2000 and IEICE Fellow in 2002. He is the recipient of many awards including, IPSJ
Memorial Prize Wining Paper A
Award in 1985, IPSJ Best Paper Award in 1996, IPSJ Contribution
Award in 2007, IEICE Achievement Award in 2001, IEICE Best Paper Award, IEEE ICOIN-11 Best
Paper Award in 1997, IEEE ICOIN-12 Best Paper Award in 1998, IEEE ICPADS Best Paper Award in
2000, IEEE 5-th WMSCI Best Paper Award in 2001, UIC-07 Outstanding Paper AwardA
in 2007,
Telecommunication Advancement Foundation Incorporation Award in 1991, Tohoku Bureau of
Telecommunications Award in 2002, The Commendation for Science and Technology by the MEXT,
T in
2009, etc. He was the vice president of IPSJ in 2002, IFIP representative from Japan in 2002, anassociate member of Science Council of Japan in 2007, and president of IPSJ in 2009. He is working on
methodology and technology for symbiosis of human and IT environment.
>3DSHUV@>@ .D]XR+DVKLPRWR*HQ.LWDJDWD+LGH\XNL 7DNDKDVKL $WXVKL7DNHGD'HEDVLVK&KDNUDERUW\DQG1RULR6KLUDWRUL CC
6RFLRIDPLOLDU 3HUVRQDOL]HG 6HUYLFH DQG ,WV $SSOLFDWLRQ  7RZDUGV D 1HZ 1HWZRUN 6RIWZDUH IRU 1H[W *HQHUDWLRQ
8ELTXLWRXV 6HUYLFH  ,(,&( 7UDQVDFWLRQV RQ &RPPXQLFDWLRQV 9RO-% 1R SS $SU  ,QYLWHG
3DSHU>@ 1RULR 6KLUDWRUL.HQML6VXJDZDUD<XVXNH 0DQDEH6KLJHUX)XMLWD%DVDEL&KDNUDERUW\ CC6\PELRWLF&RPSXWLQJ%DVHG$SSURDFK7RZDUGV5HGXFLQJ8VHU V%DUGHQ'XHWR,QIRUPDWLRQ([SORVLRQ¶¶-RXUQDORI,QIRUPDWLRQ3URFHVVLQJ9RO
1RSS-DQ  ,QYLWHG3DSHU>@ 1RULDNL 8FKLGD.D]XR7DNDKDWD<RVKLWDND6KLEDWDDQG1RULR6KLUDWRUL CC$/DUJH6FDOH5REXVW'LVDVWHU,QIRUPDWLRQ
6\VWHP EDVHG RQ 1HYHU'LH 1HWZRUN¶¶ 3URF RI WKH WK ,((( ,QWHUQDWLRQDO &RQIHUHQFH RQ $GYDQFHG ,QIRUPDWLRQ
1HWZRUNLQJDQG$SSOLFDWLRQV $,1$ SS0DUFK

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2012/10/02

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2011 Sponsored Division
3-5. Environmental-Adaptive Information and Communication
Engineering: goals and achievements in 2011

To
embodyahumanity-rich-communicationbyinnovating
information-and-communication technology (ICT) in the sustainable global
society, we have to create human-friendly low-environmental-impact ICT
devices and systems by using electronic materials and device-technology inthe research fields of Nanotechnology, Spintronics and Information
technology. Our aim is that the embodiment of low-environmental-impact
information devices and electronic equipments based on fundamental theoryof spin and electron; these are designed by systematic survey of therapidly-changing industry needs and R&D trends. We report the summaryof our activities in 2011.

5HVHDUFKThe biggest Tsunami induced by the mega-earthquake destroyed the 4
nuclear plants in Fukushima at 11 March 2011.

The destruction caused

scattering of radioactive materials onto Fukushima and neighboring
prefectures.

This radioactive environmental pollution will affect our daily

life over 30 years at least.

We must remove the pollution or otherwise

reduce deleterious effects on our daily life as far as possible.

For this

purpose, we have started to research a low-cost-high-sensitivity visualization
device for detecting gamma-ray exposure, using our nanostructured material
being developed.
Achievement
We evaluated the lowest gamma-ray dose for discoloration of plate-like silver
nanoparticles adhered on plate-like D-alumina powder in the range of 3 ²
3000 Gy (60Co) in various aqueous solution conditions. As a result of survey,
it was found that the dose was tentatively 30 Gy at a certain solution
condition.

Radical species generated by radiation decomposition of watermolecules probably discolor the powders.

Though this dose is almost equal

to that of existing chemical gamma-ray sensing materials, much higher
sensitivity is required for our purpose.

We are going to make the sensitivity

higher by designing the solution condition. Further this material would beapplied for a disposable gamma-ray-sensitive RF device.

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2011 Spoansored Division
Environmental-Adaptive Information and Communication Engineering

Does it contain Wisdom?
Environmental-Adaptive Information and Communication Engineering

Eiki Adachi,

Professor[Research Target and Activities]
Researchtarget:Toembodyahumanity-rich-communicationbyinnovating
information-and-communication technology (ICT) in the sustainable global society, we have to createhuman-friendly low-environmental-impact ICT devices and systems by using electronic materials anddevice-technology in the research fields of Nanotechnology, Spintronics and Information technology.
Our aim is that the embodiment of low-environmental-impact information devices and electronicequipments based on fundamental theory of spin and electron; these are designed by systematicsurvey of the rapidly-changing industry needs and R&D trends.
Activities:
The biggest Tsunami induced by themega-earthquake destroyed the 4 nuclear plants inFukushima at 11 March 2011. The destruction caused
scattering of radioactive materials onto Fukushima andneighboring prefectures.
This radioactive environmental
pollution will affect our daily life over 30 years at least. We
must remove the pollution or otherwise reduce deleterious
effect on our daily life as far as possible. For this purpose, we have started to research a
low-cost-high-sensitivity visualization device for detecting gamma-ray exposure, using ournanostructured material being developed. We evaluated the lowest gamma-ray dose for discolorationof plate-like silver nanoparticles adhered on plate-like -alumina powder in the range of 3 – 3000 Gy(60Co) in various aqueous solution conditions. As a result of survey, it was found that the dose wastentatively 30 Gy at a certain solution condition.
Radical species generated by radiation
decomposition of water molecules probably discolor the powders. Though this dose is almost equal tothat of existing chemical gamma-ray sensing materials, much higher sensitivity is required for our
purpose. We are going to make the sensitivity higher by designing the solution condition. Further
this material would be applied for a disposable gamma-ray-sensitive RF device.
[Staff]
Professor: Eiki Adachi, PhD.
[Profile]
Eiki Adachi, Education: B.S. in Physics (Saitama University, May 1989), M.S. in Physics (Tokyo
Institute of Technology, May 1991), Ph.D. (Tokyo University, May 1996). History of employment:
ERATO project, National institute of physiological sciences, L’ORÉAL Tsukuba center, Fuji electricadvanced technology Co., Ltd., Fuji electric holdings Co., Ltd., Professor, Research Institute ofElectrical Communication (Tohoku University, May 2010~).
Research field: Synthesis ofnanomaterials and its application for communication technology.
[Papers]34

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2011 Laboratory for Nanoelectronics and Spintronics
Laboratory for Nanoelectronics and Spintronics
The Laboratory for Nanoelectronics and Spintronics of the Research Institute ofElectrical Communication was established on April of 2004. Its purpose is todevelop and establish the science and technology of nanoelectronics andspintronics for information technology. Utilizing the facilities installed in the
Nanoelectronics-and-Spintronics building and under collaboration between the
RIEC and electro-related laboratories of the Graduate Schools of Engineering,
Information Sciences, Biomedical Engineering, Tohoku University, R&D of
nanotechnologies of materials and devices in Nanoelectronics and Spintronics will
be continued extensively. Furthermore, nation-wide and world-wide collaboration
research projects will be conducted to build a systematic database in the electricalcommunication research area.
The Laboratory for Nanoelectronics and Spintronics mainly consists of researchgroups which promote following sections: Atomically Controlled Processing,
Semiconductor Spintronics and Nano-Molecular Devices; together with the groups
of Intelligent Nano-Integration System, Quantum-Optical Information Technology,
and Ultra-Broadband Signal Processing. These groups cooperatively carry out the
research aimed at establishing a world-wide COE in the research area of
nanoelectronics and spintronics.

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2011 Laboratory for Nanoelectronics and Spintronics
Highlights of Research Activities in 2011

Atomically Controlled Processing and Nano Integration
� Atomically Controlled Processing (J. Murota and M. Sakuraba)
In this year, following experimental results have been obtained: (1) In thermal
treatment of atomic-order nitrided Si0.3Ge0.7(100) at 400 oC, Si3N4 is dominantly formed at
the surface. (2) Although Si1-xGex deposition rate on Si(100) and electrical activity of B
atoms in B-doped Si(100) are changed by strain in Si(100), electrical activity of B instrained B-doped Si1-xGex on Si(100) is scarcely affected by strain in Si(100). (3) Fromthermionic emission characteristics of p-type resonant tunneling diode of strained
SiGe/Si(100) with high Ge fraction, introduction of higher-barrier materials as well as
atomic-order flatness control of heterointerface is important to improve resonant
tunneling characterstics.

� Intelligent Nano-Integration System (K. Nakajima and S. Sato)(1) We have analyzed burst dynamics bound by potential with active areas by using a
new concept virtual particle dynamics. Furthermore, we have tried to apply an inverse
function delayed neuron model with high-order synapse connections to practicalapplications, and we have demonstrated the possibilities of them. (2) We studied theswitching characteristics of stacked Nb/AlOx/Nb Josephson junctions with JSIM, which isa simulator for superconducting integrated circuits, and compared the results withexperimental data. It has been found that the experimental data indicates much larger
switching probabilities. We confirmed that it is necessary to identify electron
temperature and stray capacitances for consistency with conventional theory. (3) We
measured characteristics of electrical delay and high-speed operations in logic cell units
for a superconducting 8-bit parallel multiplier. As a result, details of delay characteristics
of logic cells were obtained by measurements of fabricated circuits. Meanwhile, we
improved a threshold characteristic in the superconducting quantum interference device
for a neural network solving N-Queens problem. An increase of the correct pattern ratioof N-Queens problem was confirmed by numerical simulations.

Semiconductor Spintronics and Information Technology� Semiconductor Spintronics and Nano-Spin Memory(H. Ohno, Y. Ohno, F. Matsukura, and S. Ikeda)
Our research activities focus on the establishment of fundamental technologies for
future spintronics devices. The outcomes in the last fiscal year are following. (1)36

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2011 Laboratory for Nanoelectronics and Spintronics
Discovery of asymmetric nuclear magnetic resonance spectrum at low magnetic fields in astrained (110) GaAs quantum well. (2) Determination of domain wall width and exchange
stiffness constant by analyzing domain structures in Ta/CoFeB/MgO. (3) Discovery oflarger modulation ratio of magnetic anisotropy by electric filed in annealed
Ta/CoFeB/MgO than as-deposited. (4) Generation of polarization-entangled photons witha high fidelity of 0.72 ± 0.05 from single GaAs quantum dots by an electric field. (5)Investigation of switching current and thermal stability in CoFeB/MgO based
perpendicular easy axis MTJs (p-MTJs) with different junction size. (6) Acquisition of amaterials design guideline for annealing-tolerability in the back-end process of CMOS
integrated circuits. (7) Achievement of nonvolatility for system LSI in CoFeB/MgO based
p-MTJ with the stepped structure.
Research activities in "Research and development of ultra-low power spintronics-based
VLSIs" under "Funding Program for World-Leading Innovative R&D on Science andTechnology (FIRST Program)," initiated by CSTP. (1) The long range order parameter andperpendicular anisotropy (Keff~1.8 Merg/cc) were successfully enhanced by inserting
CoFeB between 3.0 nm-thick FePd

and MgO barrier. (2) L10-ordered MnAl films showeda large anisotropy with ~1×107 erg/cc and a low damping constant of 0.006. (3)Current-induced effective field was observed in Ta/CoFeB/MgO wire. (4) Operation of afully parallel 6T-2MTJ nonvolatile TCAM (ternary content-addressable memory) cell anda FPGA (field-programmable gate array) cell fabricated by a 90-nm CMOS/MTJ process
was verified. (5) World·s fastest operation of 600 MHz in a nonvolatile MTJ/COMS latch
circuit was verified.

� Ultra-Broadband Signal Processing (T. Otsuji and T. Suemitsu)
1. Ultra-Broadband Devices and Systems
The goal of our research is to explore the terahertz frequency range by means of novel
electron devices and systems. Graphene has massless electrons/holes, and their
extraordinary carrier transport properties are expected to break through the limit on
conventional device operating speed/frequency performances. We have developed
graphene-channel FET·s featured by novel gate-stack technologies utilizing SiCN or DLC(diamond-like carbon) dielectrics, which will lead to realization of terahertz transistors.
We have also succeeded in observation of amplified stimulated emission of terahertz
radiation from optically pumped graphene, proving our theoretical discovery of thepossibility of the negative dynamic conductivity in a wide terahertz range, which will leadto new types of terahertz lasers.
2. Ultrafast Electron Devices
The target of this study is the compound semiconductor devices to explore ultimate
operation speed of electron devices, such as millimeter- and sub-millimeter-wave

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2011 Laboratory for Nanoelectronics and Spintronics
frequency range. In InGaAs-based high-electron mobility transistors (HEMTs), the SiCN
mold technique is developed to form T-gate electrodes with detail control of the crosssectional shape. This technique will enable us to estimate the impact of the parasitic gate
delay caused by the T-gate electrodes. The process technology for GaN-based HEMTs isalso established to explore the millimeter-wave transistors with high breakdown
voltages.

� Quantum-Optical Information Technology (K. Edamatsu and H. Kosaka)
1. We have developed an efficient entangled-photon source with two-period
quasi-phase-matched spontaneous parametric down conversion. We have demonstrated
the generation of photon pairs that exhibit entanglement either in polarization or in
frequency.
2. We are developing a quantum media converter from a photon to an electron spin torealize a quantum repeater, which is expected to extend the transmission distance ofquantum info-communication. We have demonstrated (1) time-bin photonic state transfer
to electron spins instead of the conventional polarization state transfer, (2) electron spinstate tomography with coherent Kerr effect, and (3) preparation of experiments forachieving photonic state transfer to a quantum memory in diamond.
3. We have developed transient micro-pump-probe spectroscopy of single semiconductor
quantum dots using heterodyne detection technique. We have succeeded in monitoring
the ultrafast optical manipulation of a single quantum state in the single dot.

Nano-Molecular Devices
� Nano-Molecular Devices (M. Niwano and Y. Kimura)
1.Fabrication of miniaturized hydrogen gas sensors using anodic titanium oxide
nanotube films.
Hydrogen gas sensors were miniaturized by the hybrid process between thephotolithography technique and the anodization process of titanium. The channel lengthof the sensors was 3 μm. In the case of introducing 10 % hydrogen gas, the current of
about 1 mA was sensed without using a comb-shaped electrode. The conductance change
was about 20 times. This indicates that the hybrid process is a suitable method forminiaturization of gas sensors and reduction in power consumption and integration of gas
sensors are expected.
2.Investigation of the effect of F4TCNQ molecular doping to P3HT
The effect of F4TCNQ molecular doping to P3HT was investigated using displacement
current measurement (DCM) and infrared absorption spectroscopy. Infrared absorption
spectra of doped P3HT films indicate that most of F4TCNQ molecules were associated38

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2011 Laboratory for Nanoelectronics and Spintronics
with generation of holes. The DCM curves suggest that the carrier injection did not occur
at the interface between doped and non-doped P3HT layers although it takes place at themetal/organic film interface.
3. Simultaneous measurements of ion-channel currents at bilayer lipid membranes(BLMs) in Si substrates
Free-standing bilayer lipid membranes (BLMs) were reconstituted in microfabricatedapertures in Si substrates and ion channel proteins were incorporated into the BLMs.
Then this BLM device was extended to a multi-site array format. Simultaneous recordingof channel current activities from the multiple BLMs was demonstrated by using a model
channel gramicidin.
4. Artificial BLM chips based on Teflon-coated Si substrates
The surface of the above-mentioned Si chip was coated with insulator layers of Teflon
and SiO2. The insulator coatings worked to reduce the total capacitance, leading to noise
reduction (1-2 pA in peak-to-peak) and elimination of current transients (< 0.5 ms). Theseelectric properties are suitable for recording activities of biological ion-channel proteins
useful for drug screening and biosensor applications.
39

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2011 Laboratory for Nanoelectronics and Spintronics
Atomically Controlled Processing

Creation of Atomically Controlled Processing of Group IV Semiconductor andApplication to Nano Heterodevices
Atomically Controlled Processing
Group IV Quantum Heterointegration

Junichi Murota, Professor
Masao Sakuraba, Associate Professor[Research Target and Activities]
Development of atomically controlled processing technology in deposition and etching is quite
important to fabricate future higher-performance ultralarge-scale integrated circuits (ULSIs) as wellas quantum devices for new functions and to create new materials with novel properties which are
different from that of conventional bulk materials. To overcome the limits of Si material properties anddevice miniaturization and to achieve on-chip integration of ultimate charge control into Si ULSIs, thislaboratory aims to establish atomically controlled processing for nanometer-order artificial
heterostructures of group IV semiconductors with atomically controlled surface and interfaces andnanometer-order three-dimensional patterning with molecular control to fabricate nanometer-orderheterostructure devices. (Fig. 1)
In this year, following experimental results have been obtained: (1) In thermal treatment of
atomic-order nitrided Si0.3Ge0.7(100) at 400 oC, Si3N4 is dominantly formed at the surface. (2) Although
Si1-xGex deposition rate on Si(100) and electrical activity of B atoms in B-doped Si(100) are changed bystrain in Si(100), electrical activity of B atoms in strained B-doped Si1-xGex on Si(100) is scarcely
affected by strain in Si(100). (3) From thermionic emission characteristics of p-type resonant tunneling
diode of strained SiGe/Si(100) with high Ge
fraction, introduction of higher-barriermaterials as well as atomic-order flatness
control of heterointerface is important toimprove resonant tunneling characteristics.
[Staff]
Professor: Junichi Murota, Ph.D.
Associate Prof. : Masao Sakuraba, Ph.D.

Fig. 1. 10 nm-scale quantum nanodevices withstrain controlled nano-scale patterned
heterostructure of group IV semiconductors.

[Profile]
Junichi Murota received the B.E., M.E. and
Ph.D degrees in electronic engineering from Hokkaido University in 1970, 1972 and 1985, respectively.
He joined the Electrical Communication Laboratory, Nippon Telegraph and Telephone Public
Corporation in 1972. In 1985 and 1995 he became an Associate Professor and a Professor, respectively,in the RIEC, Tohoku University. He was awarded the 3rd Yamazaki-Teiichi Prize (2003), the JSAP
Fellow (2009) and the Commendation for Science and Technology by the MEXT (2010).
Masao Sakuraba received the B.E. degree in electrical engineering in 1990 and M.E. and Ph.D degrees
in electrical and communication engineering in 1992 and 1995, respectively from Tohoku University.
In 2002 he became an Associate Professor in the RIEC. He was awarded Young Researcher Award ofInt. Conf. SSDM (1992) and 12th Research Encouragement Award of Tokin Foundation for
Advancement of Science and Technology (2001).

[Papers][1] T. Kawashima, M. Sakuraba, B. Tillack and J. Murota, “Behavior of N Atoms after Thermal Nitridationof Si1-xGex Surface”, Thin Solid Films, Vol.520, pp.3392–3396 (2012).
[2] J. Murota, M. Sakuraba and B. Tillack, “Atomically controlled CVD processing of group IV
semiconductors for ultra-large-scale integrations” (Review Paper), Adv. Nat. Sci.: Nanosci.
Nanotechnol., Vol.3, p.023002 (4 pages), 2012.
[3] J. Murota, M. Sakuraba and B. Tillack, “Atomically Controlled Processing in Silicon-Based CVD
Epitaxial Growth”, J. Nanosci. Nanotechnol., Vol.11, pp.8348-8353 (2011).

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Contact to Professor Junichi Murota：murota@riec.tohoku.ac.jp

2012/10/02

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2011 Laboratory for Nanoelectronics and Spintronics
6HPLFRQGXFWRU6SLQWURQLFV

1DQRVFLHQFHDQG1DQRWHFKQRORJ\IRU6SLQWURQLFVDQG7+]/DVHUVFunctional Spintronics: Hideo Ohno, Professor
Functional Spin Photonics: Yuzo Ohno, Associate Professor
Functional Spintronics Materials: Fumihiro Matsukura, Associate Professor>5HVHDUFK7DUJHWDQG$FWLYLWLHV@
We are working on the nanoscience andnanotechnology to control the quantum states insemiconductors, especially the spin-states and opticaltransitions in the mid-infrared to THz.
Materials
of interest include GaAs/AlAs,
InAs/(Al,Ga)Sb, GaN, and ZnO, with and without
doping of magnetic elements, all grown by molecularbeam epitaxy. We are investigating electrical, optical,
magnetic properties of these materials and theirapplication to new functional devices, such as
memories and logic devices using spin states as wellas quantum cascade lasers (QCL) with THz emission.
The outcomes in the last fiscal year are (1)Discovery of asymmetric nuclear magnetic resonance spectrum at low magnetic fields in a strained(110) GaAs quantum well. (2) Discovery of larger modulation ratio of magnetic anisotropy by electric
filed in annealed Ta/CoFeB/MgO than as-deposited. (3) Generation of polarization-entangled photons
with a high fidelity of 0.72 ± 0.05 from single GaAs quantum dots by an electric field.
>6WDII@Professor: Hideo Ohno, Dr.
Associate Professor: Yuzo Ohno, Dr.
Associate Professor: Fumihiro Matsukura, Dr.
Assistant Professor: Keita Ohtani, Dr.
Research Fellow: *KDOL0RKVHQ'U
Research Fellow: Katsuya Miura, Dr.
>3URILOHRI3URIHVVRU+LGHR2KQR@
Hideo Ohno received Ph. D. degree from the University of Tokyo in 1982. He was with the Faculty ofEngineering, Hokkaido University as a Lecturer (1982) and then as an Associate Professor (1983). He
moved to Tohoku University in 1994 as a Professor. He received the IBM Japan Science Prize (1998),
the IUPAP Magnetism Prize (2003), the Japan Academy Prize (2005), the 2005 Agilent Technologies
Europhysics Prize, Thomson Reuters Citation Laureates (2011), and JSAP Outstanding Achievement
Award (2011). He is Institute of Physics (IOP) Fellow (2004), Honorable Professor at Institute of
Semiconductors, Chinese Academy of Sciences, and JSAP fellow (2007), Distinguished Professor at
Tohoku University (2008), and IEEE Magnetic Society Distinguished Lecturer for 2009. He is amember of JSAP, JPS, JACG, IEICE, APS, IOP, IEEE, and AVS.
>3DSHUV@>@ - ,VKLKDUD 0 2QR * 6DWR 6 0DWVX]DND < 2KQR DQG + 2KQR 0DJQHWLF )LHOG 'HSHQGHQFH RI 4XDGUXSRODU
6SOLWWLQJDQG1XFOHDU 6SLQ&RKHUHQFH7LPHLQD6WUDLQHG  *D$V4XDQWXP:HOO-DSDQHVH-RXUQDORI$SSOLHG
3K\VLFV9RO'0 SDJHV $SULO
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6WUXFWXUHE\(OHFWULF)LHOGV-RXUQDORI3K\VLFV&RQIHUHQFH6HULHV9RO SDJHV 
>@ 0*KDOL.2KWDQL<2KQRDQG+2KQR*HQHUDWLRQDQGFRQWURORISRODUL]DWLRQHQWDQJOHGSKRWRQVIURP*D$V
LVODQGTXDQWXPGRWVE\DQHOHFWULFILHOG1DWXUH&RPPXQLFDWLRQV9RO SDJHV )HEUXDU\

Contact to Professor Hideo Ohno：ohno@riec.tohoku.ac.jp

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2011 Laboratory for Nanoelectronics and Spintronics
1DQR0ROHFXODU'HYLFHV&RQWURORIVXUIDFHDQGLQWHUIDFHRIPROHFXODULQIRUPDWLRQDOGHYLFHVDQG
GHYHORSPHQWRIQRYHOQDQRPROHFXODUGHYLFHV
Nano-Molecular Devices: Michio Niwano, Professor
Nano-Electron Devices: Yasuo Kimura, Associate Professor>5HVHDUFK7DUJHWDQG$FWLYLWLHV@
Our research aims at application of semiconductor micro/nano-fabrication to semiconductor
devices or many kinds of biosensors. We have investigated development of 1) a biomolecular sensing
system using Si fabrication technologies and 2) a nanofabrication method using electrochemical
processes such as anodization of valve metals.
1) Fabrication of porous Ti/Al composite counter electrodes fordye-sensitized solar cells
Porous Ti/Al composite counter electrodes were developed for
dye-sensitized solar cells (DSCs). The composite counterelectrodes reduced the sheet resistance to increase the fill factor.
2) Simulations of pharmacological actions in the basal ganglia
circuitComputational simulations were carried out to investigate Experimental system for in situ
pharmacological effects in the basal ganglia (BG). They monitoring of cell activity by surface
infrared spectroscopy
demonstrated that dopamine depletion in the BG and the frontal
cortex causes delay of eye movements and induces oscillation of
the neuronal activity in the BG.
3) Bilayer lipid membranes (BLMs) in Teflon-coated silicon chips
Low-noise silicon (Si) chip was proposed as a platform forsuspending stable BLMs. After coating the microfabricated Si
chips with insulators (Teflon and SiO2), current noise wasmarkedly reduced. Single-channel activities were clearly
resolved at BLMs formed in the Si chips, demonstrating theusefulness of the insulator coatings.
 >6WDII@
Professor: Michio Niwano, Dr.
Associate Professor: Yasuo Kimura, Dr.
The structure of DSC using a porous
Ti/Al composite counter electrode
Assistant Professor: Yuki Aonuma, Dr.
>3URILOH@
Michio Niwano 1998 ² present RIEC, Tohoku University, Japan, Professor, Doctorate of Science
Memberships: The Electrochemical Society (ECS), The Material Research Society (MRS), American
Vacuum Society (AVS), The Japan Society of Applied Physics (JSAP)
Yasuo Kimura2010 ² present RIEC, Tohoku University, Japan, Associate Professor, Ph. D. Eng.
Memberships: The Electrochemical Society (ECS), The Japan Society of Applied Physics (JSAP), The
Surface Science Society of Japan>3DSHUV@>@ 0RKDPPDG 0DNVXGXU 5DKPDQ 5\RWD .RMLPD (O )DVV\ )LKU\ 0HKGL 'DLVXNH 7DGDNL 7HQJ 0D <DVXR .LPXUD0LFKLR1LZDQR³(IIHFWRI3RURXV&RXQWHU(OHFWURGHZLWK+LJKO\&RQGXFWLYH/D\HURQ'\H6HQVLWL]HG6RODU&HOOV´-SQ-$SSO3K\V9ROSS
>@  .HLLFKLUR1R]DZD$]XVD2VKLPD7RPRKLUR1DVX$WVXVKL6KRML$\XPL+LUDQR,ZDWD0LFKLR1LZDQRDQG0DVDR6XJDZDUD ³,Q VLWX PRGLILFDWLRQ RI OLSLGORDGHG 0&0 FKDQQHOV ZLWK ERYLQH VHUXP DOEXPLQ DW D SODQDU OLSLGELOD\HUIRUELRVHQVLQJ´6HQVRUVDQG$FWXDWRUV%&KHPLFDO9RO,VVXHSS
[3] Azusa Oshima, Ayumi Hirano-Iwata, Tomohiro Nasu, Yasuo Kimura, and Michio Niwano,´Mechanically Stable Lipid Bilayers in Teflon-Coated Silicon Chips for Single-Channel Recordingsµ,
Micro and Nanosystems, Vol.4, No.1, pp.2-7, 2012.

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Contact to Professor Michio Niwano：niwano@riec.tohoku.ac.jp

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2011 Laboratory for Nanoelectronics and Spintronics
 1DQR6SLQ0HPRU\

5HVHDUFKRIVSLQEDVHGGHYLFHDQGPHPRU\
Nano-Spin Memory

Shoji Ikeda, Associate Professor&U$X
Ru (5)Ta(5)Co20Fe60B20(1.5)
MgO(0.9)>5HVHDUFK7DUJHWDQG$FWLYLWLHV@
We are developing technologies to realize advanced spin
memory and logic devices using magnetic tunnel junctions(MTJs). In our group, the following results were obtained.
1) We investigated junction size dependence of thermal
Co20Fe60B20(0.9)
stability factor (E/kBT) in perpendicular anisotropy
Ta(5)CoFeB/MgO MTjs (p-MTJs) which have attracted much
Ru(10)
attention as a core storage device in spintronics based
VLSIs. The E/kBT maintains almost constant value within
Ta(5)d range from 81 nm to 40 nmI. 2) We have investigated the
SiO2/Si sub.
 QP
origin of reduced tunnel magnetroresistance (TMR) ratio of
the p-MTJs with 40 nmI annealed at 350-400°C, which is
6FKHPDWLF RI SHUSHQGLFXODU DQLVRWURS\desired in the back-end process of CMOS integrated circuits.
&R)H%0J2EDVHG PDJQHWLF WXQQHO MXQFWLRQ
We find that reduction of dipole coupling, which is one of07- ZLWKGLIIHUHQWMXQFWLRQVL]H
sources for lack of AP configuration, restores the TMR ratio
even after annealed at 400°C. 3) We developed a CoFeB/MgO
based p-MTJ with the stepped structure using 300 nm
reference layer and 100 nm recording layer in diameters. We obtained thermal stability factor
E/kBT=72.9 in P state and 70.1 in AP state by using stepped structure, indicating that nonvolatility forsystem LSI was achieved.
>6WDII@
Associate Professor : Shoji Ikeda, Ph.D.
Research Fellow : Katsuya Miura, Ph.D.
Research Fellow : Tadashi Yamamoto>3URILOH@
Shoji Ikeda received the B.S., M.S., and Ph. D degrees from Muroran Institute of Technology,
Muroran, Japan, in 1991, 1993 and 1996, respectively. He was a Research Associate with the
Department of Electrical and Electronic Engineering at the Muroran Institute of Technology from1996 to 1999. He was with Fujitsu Limited, Atsugi/Nagano, Japan, from 1999 to 2003. He joined
Tohoku University, Sendai, Japan, in 2003, where he is currently an Associate Professor. His current
research interests include magnetic metal devices with nanostructures and their application. He
received the Magnetics Society of Japan Distinguished Paper Award in 2003 and the APEX/JJAPPaper Award in 2009.
>3DSHUV@>@  . 0LXUD 6 ,NHGD 0 <DPDQRXFKL + <DPDPRWR . 0L]XQXPD + ' *DQ-+D\DNDZD 5 .RL]XPL )
0DWVXNXUDDQG+2KQR&R)H%0J2EDVHGSHUSHQGLFXODUPDJQHWLFWXQQHOMXQFWLRQVZLWKVWHSSHGVWUXFWXUH
IRUV\PPHWUL]LQJGLIIHUHQWUHWHQWLRQWLPHVRI³´DQG³´LQIRUPDWLRQ'LJ7HFK3DS6\PS9/6,7HFKQRO
>@  + 6DWR 0 <DPDQRXFKL . 0LXUD 6 ,NHGD + ' *DQ . 0L]XQXPD 5 .RL]XPL ) 0DWVXNXUD DQG +
2KQR-XQFWLRQVL]HHIIHFWRQVZLWFKLQJFXUUHQWDQGWKHUPDOVWDELOLW\LQ&R)H%0J2SHUSHQGLFXODUPDJQHWLF
WXQQHOMXQFWLRQV$SSOLHG3K\VLFV/HWWHUV9RO-XO\
>@  +'*DQ+6DWR0<DPDQRXFKL6,NHGD.0LXUD5.RL]XPL)0DWVXNXUDDQG+2KQR2ULJLQRIWKHFROODSVHRIWXQQHOPDJQHWRUHVLVWDQFHDWKLJKDQQHDOLQJWHPSHUDWXUHLQ&R)H%0J2SHUSHQGLFXODUPDJQHWLF
WXQQHOMXQFWLRQV$SSO3K\V/HWW9RO'HFHPEHU Contact to Associate Professor Shoji Ikeda：sikeda@riec.tohoku.ac.jp

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2011 Laboratory for Brainware Systems
Laboratory for Brainware Systems

Research Targets and Activities of Laboratory for Brainware Systems
The Laboratory for Brainware Systems of the Research Institute of Electrical Communication was established in 2004. Its
purpose is to contribute to the research and development of advanced information science and technology for Brainware
systems which realize a seamless fusion of the changeable and complex real world and the cyber space.
We aim at establishing scientific and technological foundations for Real-World Computing (section), New Paradigm VLSI
System (section), Intelligent Nano-Integration System (section), Microarchitecture (section), Cyber Robotics (planned section),and Next-Generation Human Interface (planned section). The Laboratory for Brainware Systems consists of the above six
sections which cooperatively carry out the research. At the same time they serve as a laboratory for nation-wide cooperative
research in the field of Brainware systems.
The technology developed in the Laboratory is expected to enhance the research carried out in the four Divisions of theInstitute, and the research conducted in the Divisions, in turn, is expected to provide scientific basis for the information
technology developed in the Laboratory.

[Research Target]
Real-WorldW
Computingpg Section: Living organisms exhibit surprisingly adaptive and versatile
behavior in real time under unpredictable and unstructured real world constraints via
spatiotemporal coordination of a significantly large number of bodily degrees of freedom.
Clarifying these remarkable abilities enable us to understand life-like complex adaptive systems
as well as to construct truly intelligent artificial systems. A prominent concept for addressing thisissue is ´autonomous decentrali]ed controlµ in which non-trivial macroscopic functionalities are
emerged via spatiotemporal coordination among vast amount of autonomous components thatcannot be explained solely in terms of individual functionality. We investigate the design principleof autonomous decentralized systems that exhibit life-like resilient behaviors from the viewpointsof robotics, mathematics, nonlinear science, and physics.
New Paradigm
g VLSI SystemySection Section: Performance degradation of System on a Chip
(SoC) or Network on Chip (NoC) due to wiring complexity, power dissipation and characteristic
variation of materials/devices is increasingly getting a serious problem in recent VLSI era. Our
research activity is to solve the above problem by the following two ways: the use oflogic-in-memory architecture based on nonvolatile storage elements combined with CMOS logic,
and the use of asynchronous data-transfer scheme based on multiple-valued current-mode logic,
which would open up a novel VLSI chip paradigm, called a ´new-paradigm VLSI system.µIntelligentgNano-Integrationg
SystemySection: Our research activities cover the fields ofarchitectures of Brain computing systems, characterization and application of artificial neuralnetworks, computer aided designs and fabrications of intelligent integrated circuits, andexploitation of new devices for neural circuits. At present research is focused on the large scale
integration of Brain computing system and exploitations of new neural devices proposing aneuromorphic quantum computation.

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2011 Laboratory for Brainware Systems
Microarchitecture Section: The research activities in microarchitecture lab. include architecture
and circuit design of mixed-signal SoC applicable to sensor network system to explore brain
activity research along with mixed-signal topdown design methodology.
[Research Activities]
Real-World Computing Section (Ishiguro Laboratory): The main contributions achieved in 2011
can be summarized as follows: (1) We have constructed a modular robot that exhibits versatile
oscillatory patterns and switches spontaneously between the patterns, inspired by theplasmodium of true slime mold; (2) We have demonstrated through mathematical modeling andsimulations that only two local reflexive mechanisms, which exploit sensory information about
the stretching of muscles and the pressure on the body wall, are crucial for realizing snakes·
scaffold-based locomotion; (3) We have constructed a model of gait transition of quadruped
locomotion by fully exploiting resonance; (4) We have proposed a CPG model for quadruped
locomotion, which relies more on physical communication between the limbs rather than neuralcommunication; (5) We have derived an autonomous decentralized control scheme called acurvature derivative control for two-dimensional sheet-like robot; (6) We have proposed a CPG
model for adaptive bipedal locomotion by fully exploiting the sensory information yielded from thesoftness of the feet; (7) We have derived an autonomous decentralized control scheme that can
reproduce the locomotion of earthworms.
New Paradigm VLSI System Section (Hanyu Laboratory): In this year, we have successfully
fabricated a 4-input nonvolatile LUT (look-up table) circuit, and designed a 6-input nonvolatile
LUT circuit. Our approach to solving PVT-variation effects is to use "redundant" MTJ devices,which are connected in parallel and/or series to original MTJ devices (used as configuration
memory). By sharing write-control MOS transistors, the hardware overhead of write-control
circuits can be greatly reduced. In fact, the transistor counts of the proposed 4-input and 6-input
LUT circuits are reduced to 48 percent and 38 percent, respectively, in comparison with those of aconventional nonvolatile LUT circuit. In this year, we have also successfully designed andfabricated new nonvolatile TCAM cell circuits for performing a parallel data-search operation.
Two kinds of nonvolatile TCAM cell circuits; 6 MOS transistors with 2 MTJ devices (6T-2MTJ)
and 7 MOS transistors with 2 MTJ devices (7T-2MTJ), are proposed. The former is oriented to lesstransistors, the latter is oriented to shorter switching delay. Furthermore, we have also developed
a fine-grained power-gating scheme in asynchronous control circuits. Since power-switch control
signals are appropriately generated by slightly modifying asynchronous control signals, thehardware overhead of power-gating controller, which is a serious problem in the conventional
power-gating system, is greatly reduced.
Intelligent Nano-Integration System Section (Nakajima-Sato Laboratory): (1) We have tried toapply an inverse function delayed neuron model with high-order synapse connections to practicalapplications. (2) We studied the switching characteristics of stacked Nb/AlOx/Nb Josephson
junctions with JSIM, which is a simulator for superconducting integrated circuits, and confirmedthat it is necessary to identify electron temperature and stray capacitances for consistency withconventional theory. (3) We measured characteristics of electrical delay and high-speed operations
in logic cell units for a superconducting 8-bit parallel multiplier, and improved a thresholdcharacteristic in the superconducting quantum interference device for a neural network solving
N-Queens problem. An increase of the correct pattern ratio of N-Queens problem was confirmed
by numerical simulations.
Microarchitecture Section (Masui Laboratory): We have been investigating architecture andcircuit techniques for low-power and low-cost CMOS transceiver ICs applicable to wireless sensor
network. We have developed a dual-band (315MHz/433MHz) 3.5mW, 5Psec settling-time, 15Psec
start-up time fractional-N PLL synthesizer, where a loop-optimization method for the 4th order
PLL is elaborated for the 5Psec settling-time, and a fast calibration scheme storing the process
tuning data in a nonvolatile memory fabricated by a standard CMOS is proposed for the 15Psec
start-up time. We have also developed a low-power bandpass filter based on an active-Gm-RC
architecture, where the circuit topology is optimized for the filter characteristics and theassociated tuning, and a 15Psec start-up time circuit parameter optimization method isestablished as well.

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2011 Laboratory for Brainware Systems
Real-world Computing

Toward Understanding Design Principle for Life-like Resilient Systems
Real-world Computing Akio Ishiguro, Professor[Research Target and Activities]
Living organisms exhibit surprisingly adaptive and versatile behavior in real time under
unpredictable and unstructured real world constraints. Such behaviors are achieved via
spatiotemporal coordination of a significantly large number of bodily degrees of freedom. Clarifying
these remarkable abilities enable us to understand life-like complex adaptive systems as well as toconstruct truly intelligent artificial systems. A prominent concept for addressing this issue is“autonomous decentralized control”, in which non-trivial macroscopic functionalities are emerged via
spatiotemporal coordination among vast amount of autonomous components that cannot be explained
solely in terms of individual functionality. We study the design principle of autonomous decentralized
systems that exhibit life-like resilient behaviors from the viewpoints of robotics, mathematics,
nonlinear science, and physics.

Fig.1: Soft-bodied amoeboid
robot driven by a fully
decentralized control scheme
extracted from true slime moldFig.2: Decentralized control ofa snake-like robot thatexhibits highly adaptive andresilient properties

Fig.3: Quadruped robot driven
by a fully decentralized neuralnetwork-based control.

[Staff]
Professor: Akio Ishiguro, Dr.
Assistant Professor: Dai Owaki, Dr., Takeshi Kano, Dr., Kazuhiro Sakamoto, Dr.
[Profile]
Akio Ishiguro received B.E., M.E., and Ph.D. degrees from Nagoya University in 1987, 1989, and 1991,
respectively. From 1991 to 1997, he was with Nagoya University as an assistant professor. From May
1997 to 2006, he was an associate professor of the Department of Computational Science andEngineering, Nagoya University. From 2006 to 2011, he was a professor of the Graduate School ofEngineering, Tohoku University. Since April 2011, he has been a professor of Research Institute ofElectrical Communication, Tohoku University. His main research interests are in bio-inspired robotics,
nonlinear dynamics. He received 2003 IROS Best Paper Award Nomination Finalist, 2004 IROS Best
Paper Award, 2008 Ig Nobel Prize (Cognitive Science Prize), 2009 IROS Best Paper Award Nomination
Finalist, 2011 IEEE/RSJ NTF Award Finalist for Entertainment Robots and Systems.
[Papers][1]

W. Watanabe, T. Kano, S. Suzuki, and A. Ishiguro, “A decentralized control scheme for orchestrating
versatile arm movements in Ophiuroid omnidirectional locomotion”, Journal of Royal Society ofInterface, Vol.9, No.6, 2011 (DOI: 10.1098/rsif.2011.0317)[2] T. Sato, T. Kano, and A. Ishiguro, “A decentralized control scheme for an effective coordination ofphasic and tonic control in a snake-like robot”, Bioinspiration & Biomimetics, Vol.7, No.1, 2012 (DOI:
10.1088/1748-3182/7/1/016005)[3] T. Umedachi, R. Idei, T. Nakagaki, R. Kobayashi, and A. Ishiguro, “Fluid-filled Soft-bodied Amoeboid
Robot Inspired by Plasmodium of True Slime Mold”, Advanced Robotics, Vol.26, pp.693-707, 201246

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Contact to Professor Akio Ishiguro：ishiguro@riec.tohoku.ac.jp

2012/10/02

9:06:09

2011 Laboratory for Brainware Systems,QWHOOLJHQW1DQR,QWHJUDWLRQ6\VWHP%DVLF7HFKQRORJ\RI,QWHJUDWHG6\VWHPIRU,QWHOOLJHQW3URFHVVLQJIntelligent Nano-Integration System, Koji Nakajima, Professor
Integrated Superconducting Quantum System, Shigeo Sato, Associate Professor>5HVHDUFK7DUJHWDQG$FWLYLWLHV@
Our research activities cover the fields of architectures of Brain computing systems, characterization
and application of artificial neural networks, computer aided designs and fabrications of intelligent
integrated circuits, and exploitation of new devices for neural circuits. We have presented an FFT anda neural system operated by using a flux quantum logic in superconducting integrated circuits. At
present research is focused on the large scale integration of Brain computing system and exploitationsof new neural devices proposing a neuromorphic quantum computation.
Research Activities in 2011 : (1) We have analyzed burst dynamics bound by potential with active
areas by using a new concept virtual particle dynamics. Furthermore, we have tried to apply aninverse function delayed neuron model with high-order synapse
connections to practical applications, and we have demonstrated thepossibilities of them. (2) We studied the switching characteristics ofstacked Nb/AlOx/Nb Josephson junctions with JSIM, which is asimulator for superconducting integrated circuits, and compared theresults with experimental data. It has been found that theexperimental data indicates much larger switching probabilities. We
confirmed that it is necessary to identify electron temperature andstray capacitances for consistency with conventional theory. (3) We
measured characteristics of electrical delay and high-speed operations
in logic cell units for a superconducting 8-bit parallel multiplier. As aresult, details of delay characteristics of logic cells were obtained bymeasurements of fabricated circuits. Meanwhile, we improved athreshold characteristic in the superconducting quantum interference
device for a neural network solving N-Queens problem. An increase of
Figure A 4-bit parallel
the correct pattern ratio of N-Queens problem was confirmed bymultiplier using SFQ logic
numerical simulations.
>6WDII@Professor : Koji Nakajima, Dr.
Associate Professor : Shigeo Sato, Dr.
Assistant Professor : Takeshi Onomi, Dr.
>3URILOH@
Koji Nakajima was received his B.E. M.E. and Dr. Eng. from Tohoku University, Sendai, Japan, in
1972, 1975, and 1978, respectively. Since 1978, he has been working at the Research Institute ofElectrical Communication, Tohoku University. He is a professor at the same institute of Tohoku Univ.,and is currently engaged in the study of VLSI implementation of neural network, and Josephson
junction devices for digital applications.
Shigeo Sato was received his B.E. and Ph.D. degrees from Tohoku University, in 1989 and 1994,
respectively. In 1996, he joined the Research Institute of Electrical Communication, Tohoku University.
Now, he studies brain computer and quantum computer as an associate professor.
>3DSHUV@
[1] T. Sota, Y. Hayakawa, S. Sato, and K. Nakajima, ´An application of higher order connection to inverse
function delayed network,µ Nonlinear Theory and Its Appl., IEICE, vol. 2, no. 2, pp. 180-197, 2011.
[2] S. Sato, A. Ono, M. Kinjo and K. Nakajima, ´Performance evaluation of adiabatic quantum computation
using neuron-like interconnections,µ Nonlinear Theory and Its Appl., IEICE, vol. 2, no. 4, pp. 198-204, 2011.
[3] T. Onomi, Y. Maenami, and K .Nakajima, ´Superconducting neural network for solving a combinatorial
optimization problem,µ IEEE Trans. Applied Superconductivity, vol.21, no.3, pp.701-704, 2011.

Contact to Professor Koji Nakajima：hello@nakajima.riec.tohoku.ac.jp

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2011 Laboratory for Brainware Systems
Microarchitecture Laboratory

Mixed-Signal Platform Design
Microarchitecture Shoichi Masui, Professor[Research Target and Activities]

Ubiquitous society has been established by the deployment of various wireless systems ICs, and it
demands advances in mixed-signal (analog and digital) design technique as well as higher integration
through SoC (System on a Chip). Our research activities include architecture and circuit design of
mixed-signal SoC applicable to sensor network systems for the investigation of brain activities
researches as well as design automation of RF/analog circuit. We propose a mixed-signal platform tomaximize the design creativity by utilizing IP-based digital design methodology to various RF/analog
and mixed-signal circuits. From this concept, we have developed a 3.5mW, 5sec settling time, 15sec
start-up-time fractional-N PLL frequency synthesizer for a dual band (315MHz/433MHz) smart key
applications with a self-dithered sigma delta modulator to minimize the fractional spurious.

[Staff]
Professor: Shoichi Masui, Dr.
Visiting Associate Professor: Takana Kaho, Dr.
[Profile]
Shoichi Masui received the B. S. and M. S. degrees from Nagoya University, Nagoya, Japan in 1982,
and 1984, respectively, and received the Ph. D. degree from Tokyo Institute of Technology in 2006.
From 1990 to 1992, he was a Visiting Scholar at Stanford University, Stanford CA, and a Visiting
Scholar at University of Toronto, Toronto ON, Canada in 2001. Since 2007, he is a professor in
Research Institute of Electrical Communication, Tohoku University. He is the recipient of acommendation by the Minister of Education, Culture, Sports, Science, and Technology, Japan, in 2004
for his research achievements on FeRAM.
[Papers][1] D. Su, M. Loinaz, S. Masui, and B. Wooley, “Experimental Results aand Modeling Techniques for
Substrate Noise in Mixed Signal Integrated Circuits,” Journal of Solid-State Circuits, vol. 28, no. 4, pp.
420-430, 1993.
[2] S. Masui, et al., “Ferroelectric Memory Based Secure Dynamically Programmable Gate Array”, IEEE J.
of Solid-State Circuits, vol. 38, no. 5, pp. 715-725, 2003.
[3] T. Konishi, K. Inazu, J. G. Lee, M. Natsui, S. Masui, B. Murmann, “Design Optimization of High-Speedand Low-Power Operational Transconductance Amplifier Using gm/ID Lookup Table Methodology,” IEICE
Trans. on Electronics, vol.E94-C, no.3, pp. 334-345, 2011.

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2011 Laboratory for Brainware Systems
New Paradigm VLSI System Research Group

Realization of a New-Paradigm VLSI-Computing World

Fig.1: MTJ/MOS-hybrid nonvolatile
TCAM chip. Standby-power-free TCAM
has been realized with minimumtransistor counts by merging logic andstorage functions

Fig.2: Compact nonvolatile LUT circuit
using series/parallel-connected MTJ
devices.

Fig.3: Differential current-mode logic
circuit with MTJ-based variationcompensation capability.

[Research Target and Activities]
Rapid progress in recent deep submicron regime has led the capability to realize giga-scaled
embedded systems on a chip (SoC), while performance degradation of SoCs due to wiring complexity,
power dissipation and device-characteristic variation are increasingly getting serious problems in the
recent VLSI chip. Our research activity is to solve the above problems primarily by the following two
ways: the use of logic-in-memory architecture based on nonvolatile logic, and the use of asynchronous
data-transfer schemes based on multiple-valued current-mode logic, which would open up a novel
VLSI chip paradigm, called a ´new-paradigm VLSI system.µ
As this-year research results in nonvolatile-logic area, we have succeeded the fabrication of MTJ(Magnetic Tunnel Junction)-based fully-parallel ternary content-addressable memory (TCAM)
prototype chip (Fig.1), which could achieve zero-standby-power with minimum transistor counts. We
have also designed a 6-input nonvolatile lookup table (LUT) circuit using series/parallel-connected
MTJ devices (Fig.2), and demonstrated its compactness with PVT-variation resilience. Furthermore,
we have proposed a process-variation-aware VLSI design architecture based on MTJ/MOS circuit
hybrid structure (Fig.3), and confirmed its effectiveness through the evaluation of variation resistanceof a differential current mode logic gate with Vth-tuning function.
[Staff]
Professor: Takahiro Hanyu, Dr.
Assistant Professor: Masanori Natsui, Dr.

Assistant Professor: Matsumoto Atsushi, Dr.

[Profile]
Takahiro Hanyu received the B.E., M.E. and D.E. degrees in Electronic engineering from Tohoku
University, Sendai, Japan, in 1984, 1986, 1989, respectively. He is currently a Professor in the
Research Institute of Electrical Communication, Tohoku University. His general research interests
include multiple-valued current-mode logic and its application to high performance and low-powerarithmetic VLSIs.
[Papers][1] S. Matsunaga, A. Katsumata, M. Natsui, S. Fukami, T. Endoh, H. Ohno, and T. Hanyu, "Fully Parallel
6TT 2MTJ Nonvolatile TCAM with Single-Transistor-Based Self Match-Line Discharge Control," 2011
Symposium on VLSI Circuits, Digest of Technical Papers, 28-2, pp.298-299, June 2011.
[2] N. Onizawa, V. C. Gaudet, and T. Hanyu, "Low-Energy Asynchronous Interleaver for Clockless Fully
Parallel LDPC Decoding," IEEE Trans. on Circuits and Systems Part I, Vol.58, No.8, pp.1933-1943,
August 2011.
[3] D. Suzuki, M. Natsui, T. Endoh, H. Ohno, and T. Hanyu, "Six-input lookup table circuit with 62% fewertransistors using nonvolatile logic-in-memory architecture with series/parallel-connected magnetic
tunnel junctions", Journal of Applied Physics, Vol.111, Issue 7, pp.07E318(1)-07E318(3), Feb. 24, 2012.

Contact to Professor Takahiro Hanyu：hanyu@riec.tohoku.ac.jp

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2011 Research Center for 21 Century Information TechnologystIT-21 center

Research and Development of the IT-Based Practical Technology
by the Industry-Academia-Government Collaboration[Research Target and Activities]
The purpose of the IT-21 center is development of practical technologies for IT based on theadvanced technologies of RIEC with the partnership among Industry, Government and University.
The term of development is limited less than 5 years. The projects are planed on matching with bothbasic technologies in the University and application in the Industry. Combination of the technologiesof the University and Industry makes practical technologies with availability for the commercial
products. The center actively accelerates to obtain the intellectual properties generated from thedevelopment of practical technology to the Industry. From 2007, the new 2 projects were started.
1. Development of Dependable Wireless System and Devices
Our new project “Development of Dependable Wireless System and Devices” was accepted in 2007
as the Japan Science and Technology Agency (JST) CREST type research program “Fundamental
Technology for Dependable VLSI System.” The project has been executed by the collaborations
between RIEC including IT21 mobile wireless technology group, major Japanese mobile terminal
manufacturers and other universities. In this project, concept of Dependable Air, which is multi-mode
and multi-band dependable wireless network, is proposed. The targets of this project are (a) all IP
dependable wireless network which can realize a communication speed of 1Mbit/s~10Gbit/s, (b) all Si
CMOS mixed signal LSI with frequency range of 500MHz~70GHz, (c) LSI development of frequency
domain equalizer technology, and (d) scalable AD converter. In 2011 the project attained (1) All Si
CMOS integration of millimeter-band transmitter and receiver, (2) Evaluation technology for wirelessdependability by a frequency domain channel estimator, (3) Design and evaluation of the compact
antenna for millimeter-band.
2. Development of Low Power Consumption Mass Storage HDD Systems
A project “Development of super high-speed mass storage HDD systems” started in 2007 under thecollaborations between RIEC including IT21 storage technology group, major Japanese HDD
manufacturers and other related laboratories within Tohoku University. The goal of the project is the
reduction of power consumption of mass storage system. Perpendicular recording technology for 5
Tbits/inch2 areal recording density is investigated, which reduces the number of HDDs by 1/10, andlow power architecture of tiered RAID system. In 2011, (1) From numerical simulations with asuper-computer and experiments, it was shown that bit-patterned media with high gradient writing
realizes the areal density of 5 Tbit/inch2, (2) Thermal assisted recording would be necessary to attainthe high writing gradient, (3) A tiered system architecture for high performance and low power
consumption was developed.
[Staff]Director: Hiroaki Muraoka, Professor
Project Planning Division
Makoto Furunishi, Visiting Professor
Technology Development Division (Mobile Wireless Technology Group)
Kazuo Tsubouchi, Visiting Professor
Tadashi Takagi, Visiting Professor
Technology Development Division (Storage Technology Group)
Kazuhisa Fujimoto, Professor
Hajime Aoi, Visiting Professor
Takehito Shimatsu, Associate Professor
Kiyoshi Yamakawa, Visiting Associate Professor
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2011 Research Center for 21 Century Information Technology
st,7&HQWHU0RELOH:LUHOHVV7HFKQRORJ\*URXS

)RU5HDOL]LQJ'HSHQGDEOH$LU

.D]XR7VXERXFKL9LVLWLQJ3URIHVVRU 3URMHFW/HDGHU 
7DGDVKL7DNDJL9LVLWLQJ3URIHVVRU
>5HVHDUFK7DUJHWDQG$FWLYLWLHV@´'HYHORSPHQWRI'HSHQGDEOH:LUHOHVV6\VWHPDQG'HYLFHVµSURject was accepted in 2007 as the Japan
Science and Technology Agency (JST) CREST type research program.
1. All Si CMOS RFIC: For realizing Dependable Wireless System (DWS), we have developed 5GHzand 60GHz-band RF circuits using 90nm Si-CMOS technology.
2. Digitally Assisted Compensation Technology: We have developed a novel frequency domain
equalizer (FDE) technology implemented to an application specific integrated circuit (ASIC). We
have demonstrated a transmission test under multipass fading environments. Due to the FDE,
we have realized to improve bit error rate (BER) characteristics. Conventionally, FDE technology
has been evaluated by simulation. Here, we have been able to realize it by experiment.
3. Adaptive and Scalable ADC/DAC (Analog-to-Digital Converter/ Digital-to-Analog Converter): We
have devised a current mode pipeline ADC, which is suitable for process miniaturization and low
supply voltage. We have designed several core circuits of the ADC and have realized static
characteristics.
>6WDII@
Visiting Professor: Kazuo Tsubouchi, Ph.D (since 2010)
Visiting Professor: Tadashi Takagi, Ph.D (since 2010)
>3URILOH@
Kazuo Tsubouchi Prof. Tsubouchi received the Ph.D. degree in Electronics Engineering from Nagoya
University in 1974. In 1974, he joined the Research Institute of Electrical Communication, Tohoku
University. In 1982, he spent at Purdue University as a Visiting Associate Professor. From 1993 to2010, he was a professor of RIEC, Tohoku University. From 2002 to 2010, he was the director of IT-21
Center. He is currently a visiting professor. He received the 2005 Achievement Award from the
IEICE, and ´Minister of Education, Culture, Sports, Science and Technology, Awardµ in the Award for
Persons of Merit in Industry-Academia-Government Collaboration in FY2007, et al. He is a memberof the IEEE, the IEICE, the Physical Society of Japan, the Japan Society of Applied Physics, and theInstitute of Electrical Engineers of Japan.
Tadashi Takagi Prof. Takagi received the B.S. degree in physics from Tokyo Institute of Technology,
Tokyo, Japan and Ph.D. degree in electronic engineering from Shizuoka University, Shizuoka, Japan,
in 1973 and 1995, respectively. In 1973, he joined the Mitsubishi Electric Corporation, where he wasengaged in development on microwave and millimeter-wave circuits technology. From 2005 to 2010,
he was a professor of IT-21, Tohoku University. He is currently a visiting professor. He is a fellow of
IEICE and a senior member of the IEEE.

>3DSHUV@>@ 6 <RVKLGD HW DO ³$ ORZ FURVV SRODUL]DWLRQ  *+]EDQG VWDFNHG PHDQGHUOLQH DQWHQQD LQWHJUDWHG ZLWK D
PHDQGHUOLQHVKDSHEDOXQ´WK(XURSHDQ&RQIHUHQFHRQ$QWHQQDVDQG3URSDJDWLRQ (X&$3 ,WDO\$SULO
>@  ..RPDWVXHWDO³$6,&LPSOHPHQWDWLRQRIIUHTXHQF\GRPDLQHTXDOL]HUIRUVLQJOHFDUULHUWUDQVPLVVLRQ´;;;856,
*HQHUDO$VVHPEO\DQG6FLHQWLILF6\PSRVLXPRI,QWHUQDWLRQDO8QLRQRI5DGLR6FLHQFH 856,*$66 ,VWDQEXO
7XUNH\$XJXVW
>@ 777D HW DO ³$ KLJK HIILFLHQF\ 6L&026 SRZHU DPSOLILHU IRU  *+] EDQG EURDGEDQG ZLUHOHVV FRPPXQLFDWLRQHPSOR\LQJRSWLPL]HGWUDQVLVWRUVL]H´(XURSHDQ0LFURZDYH&RQIHUHQFH (X0& 0DQFKHVWHU8.2FW


Contact to Professor Kazuo Tsubouchi：tsubo@riec.tohoku.ac.jp

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2011 Research Center for 21 Century Information Technologyst ,7FHQWHU7HFKQRORJ\'HYHORSPHQW'LYLVLRQ6WRUDJH7HFKQRORJ\*URXS'HYHORSPHQWRIORZSRZHUFRQVXPSWLRQPDVVVWRUDJH+''V\VWHPV
Kazuhisa Fujimoto, Professor
Takehito Shimatsu, Associate Professor>5HVHDUFK7DUJHWDQG$FWLYLWLHV@
A new project ;Development of super high-speed mass storage HDD systems started in August 2007
under the collaborations between RIEC including IT21 storage technology group and major Japanese
HDD manufacturers. The goals of this project are to develop the perpendicular recording technologies
in the order of Tbits/inch2 recording density and, to develop the system architecture for realizing large
capacity, high performance and low power consumption storage systems. This year, we experimentallyestimated the write margin of bit patterned media consisting of magnetically-hard/soft stacked dot
arrays with dot diameter of 20 nm (a recording density inthe order of Tbits/inch2). We simulated that the recording
density of 5 Tbits/in2 can be achieved with a write marginof 4-5 nm for thermally-assisted magnetic recording on bit
patterned
media.
Moreover,weexperimentallydemonstrated that L11-Co15Ni35Pt50 dot arrays, which hada large magnetic anisotropy Ku of 1.6x107 erg/cm3 (300 K)
and a low curie temperature Tc of ~580 K, are favorable forthermally assisted magnetic recording media. In thedevelopment of high performance and low power
consumption storage systems, we demonstrated that thepower consumption in our new storage systems can be
Temperature dependence of Hr for
reduced half that of normal storage systems, maintainingL
11-Co15Ni35Pt50 dot arrays with dot
a high data transfer rate.
diameter of 30 nm.
>6WDII@Professor: Kazuhisa Fujimoto Dr., Visiting Professor: Hajime Aoi Dr., Associate Professor: Takehito
Shimatsu Dr., Visiting Associate Professor: Kiyoshi Yamakawa Dr., Visiting Researchers: Susumu
Ogawa Dr., Hideki Saga, Masaki Yamada Dr., Hirotoshi Akaike, Yuichi Osawa Dr., Hiroyasu Kataoka,
Daisuke Inoue, Koji Kudo, Takeshi Ishibashi Dr., Masahiro Aono, Kenji Oba, Koji Matsushita, Masao
Kubota, Technical Assistant: Miyuki Uomoto, Secretaries: Ayumi Sato, Aya Takano>3URILOH@
Kazuhisa Fujimoto received the Dr. of Engineering degree from Kyushu University in 1997. He joined
Central Research Laboratory, Hitachi, Ltd., in 1987. He joined RIEC, Tohoku University in 2007. He
has been engaged in research on storage system architectures.
Takehito Shimatsu received the Dr. of Engineering degree from Tohoku University. He joined RIEC in
1998. He has been engaged in research on magnetic materials and storage devices.
>3DSHUV@

[1] H. Saga, K. Shirahata, K. Mitsuzuka, T. Shimatsu, H. Aoi, and H. Muraoka, ´Impact of Multidomain
Dots on Write Margin in Bit Patterned Media Recording,µ IEEE Trans. Magn., vol.47, 2528-2531 (2011).
[2] T. Shimatsu, H. Kataoka, K. Mitsuzuka, H. Aoi, N. Kikuchi, and O. Kitakami, ´Dry-etching damage tomagnetic anisotropy of Co-Pt dot arrays characterized using anomalous Hall effect,µ Journal of Applied
Physics, vol. 111, 07B908(1-3) (2012).

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Contact to Professor Kazuhisa Fujimoto：fujimoto@riec.tohoku.ac.jp

2012/10/02

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2011 Management Office for Health and Safety
Management Office for Health and Safety

Realizing and Maintaining a Safe and Comfortable Environment to Support
Research[Research Target and Activities]

Safety and health seminarFirst aid training course
1. Outline of the Management Office for Health and Safety
The Management Office for Health and Safety is established to maintain the health and safety ofstudents and staff working at the institute. The use of chemicals, high-pressure gas and radiation in
research activities at the institute entails many risks. The Management Office for Health and Safety
provides support for health and safety management in research laboratories, experimental facilities
and the Fundamental Technology Center through various activities to ensure safe and smooth
research activities within the institute.
2. Activities by the Management Office for Health and Safety
For the actual management of health and safety at the office, the Health and Safety Committee firstpresents the basic policies of safety management at the institute, and the Management Office for
Health and Safety then plans and executes activities based on them. At the institute, laboratories andother individual sections are highly independent of each other; unlike a general corporate organization,
top-down safety management is not suitable and measures appropriate for independent sections need
to be taken. Various considerations are also necessary for students, researchers, and other members
engaged in research activities as well as faculty staff. At this institute, extremely hazardous materials
and facilities are used, including chemicals, high-pressure gas, and X-ray devices. Since there is also aclean room and other special workplaces, safety management should be extended by considering them.
In these circumstances, the Management Office for Health and Safety will monitor situations andcharacteristics in each section at the institute, plan and recommend practical management methods
and improvement measures, and support their implementation for the efficient and effective
management of health and safety. The main activities in this fiscal year are as follows:○ Holding safety and health seminar and high-pressure gas seminar for staff and students at theinstitute○ Inspection of and assistance in improving the health and safety management system and working
environment within the institute○ Holding first-aid training course○ Investigation of laws related to health and safety and collection of information regarding healthand safety management○ Providing advice and information to health and safety personnel in each department[Staff]
Manager: Michio Niwano, Professor
Deputy Manager: Yoichi Uehara, Professor
Nobuyuki Sato, Assistant Professor
Ayako Chiba, Clerk

Contact to：anzen@riec.tohoku.ac.jp

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2011 Flexible Information System Research Center)OH[LEOH,QIRUPDWLRQ6\VWHP5HVHDUFK&HQWHU'HYHORSPHQWRI)OH[LEOH,QIRUPDWLRQ6\VWHPVDQG0DQDJHPHQWRI1HWZRUNV>5HVHDUFK7DUJHWDQG$FWLYLWLHV@
Present information systems, such as today's computers
are inflexible systems, since their purpose is predefined Manuals
Memos
Human
and they only provide fixed procedures and functions.
orientedknow-how
However, flexible information system can perform flexible
Web server
Web
Books
information processing adapted to human intentions andKnowledge sources
Network information
situations of its environment.
Proposal
Our goal is to investigate the principles of flexibleAIR
information processing through theories and experiments
Autonomously
and establish their system construction methodology.
cooperate by flexible
interaction
Moreover, we also study flexible distributed systems foradvanced organization, utilization, administration, andoperation of scientific information. Through practical Management knowledge AIR
Network information AIR
applications of above results applied to the actual network
Fig.1 Knowledge based Network
in RIEC, we have confirmed the effectiveness of ourManagement System.
methods. To achieve the above goal, this year we haveconducted the following researches:(1) development of a distributed and scalable authentication method for large scale overlay network,(2) development of an agent based network management system (Fig.1) and(3) a flexible computing mechanism in biological systems.
WebǵȸȐ

>6WDII@
(1) Steering Committee
Professor: Yôiti Suzuki, Dr., Yoshihito Toyama, Dr., Tetsuo Kinoshita, Dr., Masafumi Shirai Dr.,
Atsushi Ohori, Dr., Takuo Suganuma, Dr.
(2) FIR Committee
Professor: Yoshihito Toyama, Dr., Takuo Suganuma, Dr.
Associate Professor: Takahito Aoto, Dr., Yukio Iwaya, Dr., Gen Kitagata, Dr.
Assistant Professor: Masato Yoshida, Dr., Takeshi Onomi, Dr., Kazuto Sasai, Dr.
Technical Official: Masahiko Sato
Research Fellow: Johan Sveholm Dr.
Technical Support Member: Midori Suzuki, Sachiko Nagase(3) Regular Staff
Associate Professor: Gen Kitagata, Dr.
Assistant Professor: Kazuto Sasai, Dr.
Technical Official: Masahiko Sato
Research Fellow: Johan Sveholm Dr.
Technical Support Member: Midori Suzuki, Sachiko Nagase>3URILOH@
Refer to the Advanced Acoustic Information Systems Laboratory for the profile Prof. Yôiti Suzuki.
Refer to the Computing Information Theory Laboratory for the profile Prof. Yoshihito Toyama.
>3DSHUV@

1. Gen Kitagata, Kazuto Sasai, Johan Sveholm, Norio Shiratori, and Tetsuo Kinoshita," Agent-based
Access Rights Delegation utilizing Social Relationships ," International Journal of Energy, Information
and Communications, Vol.2, No.4, pp.87-100, 2011.11.
2. Kazuto Sasai, Johan Sveholm, Gen Kitagata, and Tetsuo Kinoshita," A Practical Design and
Implementation of Active Information Resource based Network Management System ," International
Journal of Energy, Information and Communications, Vol.2, No.4, pp.67-86, 2011.11.

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Contact to Associate Professor Gen Kitagata：minatsu@fir.riec.tohoku.ac.jp

2012/10/02

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2011 Fundamental Technology Center
Fundamental Technology Center

Supporting research with high-level specialized knowledge and technology

Overview of Fundamental Technology Center[Research Target and Activities]
The Fundamental Technology Center provides a wide range of technical support for research
activities at the institute through the following four divisions; machine shop, evaluation, process, andsoftware technology. Transferring highly established skills of senior staffs to the younger generation
has also been promoted to maintain the present service level of the center. The activities of thepresent year are summarized as follows.
1. Machine Shop Division
The Machine Shop Division has been developed various novel machining methods last over forty
years. On the basis of such high-level techniques, this division can supply machining products justfitting to individual special requests from researchers. In this year, 191 of fabrications were requested.
22 of them were from researches belonging to other institutes.
2. Evaluation Division
The evaluation division provides various evaluation and measurement apparatuses for sharedusage. In this year, 16 laboratories utilized them and the utilization time was 2938 hours in total.
Glass machining and supply of liquid nitrogen are also covered by this division. There were 15
requests to the Glass machining and 3787 litters of liquid nitrogen were supplied this year.
3. Process Division
The processing division is, in cooperation with the evaluation division, responsible for operating
and maintaining the project clean room (PCR), a clean room for shared usage, along with apparatuses
for processing equipped. In this year, this clean room was utilized by 11 laboratories. In addition,customized optical filters in the visible and infrared spectral range can be produced by this division,
and were supplied to four laboratories this year.
4. Software Technology Division
The Software Technology Division has operated and maintained, in cooperation with Flexible
Information System Research Center, local area networks in the institute.
[Staff]Director (Professor): Yoichi Uehara
Assistant Professor: Nobuyuki Sato
Technical Official: Fumitaka Saito, Katsumi Sagae, Koichi Shoji, Tamotsu Suenaga,
Ryutaro Sasaki, Maho Abe, Masahiko Sato, Keisuke Sato, Kento Abe,
Hiroshi Watanabe, Munetomo Sugawara, Ryuji Yonezawa,
Yuji Konno, Sadao Tsuchida, Choichi Takyu, Shigeto Agatsuma

Contact to：eac@riec.tohoku.ac.jp

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2011 Nation-wide Cooperative Research Projects
4. Nation-wide Cooperative Research Projects
The Institute has a long history of fundamental contributions in many fields of engineering andscience that include the fields of semiconductor materials and devices, magnetic recording, opticalcommunication, electromagnetic technology, applications of ultrasonic, acoustic communication,
non-linear physics and engineering, and computer software. On the basis of this rich historicalbackground the Institute was designated as National Center for Cooperative Research in 1994.
Accompanying Tohoku University’s transformation to “a national university juridical entity” in
April,2004, this institution plays a leading role on the world stage, as its researchers, both domestic
and foreign, continue the task of “investigating the theory and application of universal science andtechnology to realize communication, to the enrichment of humanity.”
In such background, the Institute organizes Nation-wide Cooperative Research Projects bycoordinating its activities with research workers. The main themes for Cooperative Research are
selected annually by the Committee for Cooperative Research Projects. Then invitations for project
proposals and participation are extended to university faculties and government laboratories aswell as industrial research groups. Each project approved by the Faculty Council of the Institute iscarried out by a team of researchers that include members of the Institute as well as outside
participants.
The advisory Council which includes members from other institutions has an advisory function to
the Director in defining the general direction of the research at the Institute and its Nation-wide
Cooperative Research Projects.
The Project Judging Committee that includes members from the outside of Tohoku University
has a judging function for project proposals. The purpose of the Project Steering Committee is theproper operation of approved projects.

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2011 Nation-wide Cooperative Research Projects

Nation-wide Cooperative Research Projects list 2011
Project Number
Research Project Theme

Project Leader

Facilitator
in RIEC

Jun-ichi Kushibiki
Graduate School ofEngineering,Tohoku University

Yasuo
Cho

Ｈ２１／Ａ０４

Evaluation of Piezoelectric Langasite
Family Compounds by the UltrasonicMicrospectroscopy and PiezoelectricResonant-Antiresonant Frequencies
Measurement Methods and their
Applications to High-Temperature
Sensors
Ｈ２１／Ａ０５

Seiji Sahashi
Study on spintronic application of the
School of Engineering,oxide thin films with Magneto-Electric
Tohoku University
effectＨ２１／Ａ０６
Masaaki Doi
Graduate School of
STT microwave oscillation ofEngineering,self-organized multi-nano-pillar
Tohoku University
structure and its application

KazushiIshiyama

KazushiIshiyama

Ｈ２１／Ａ０８

Koichi Maezawa
High performance THz signal sources
Graduate School of Science
employing serially-connected resonantand Engineering.
tunneling diodes
University of Toyama
Ｈ２１／Ａ１０

A Study on Higher Realistic
Communication in Three Dimensional
Sound Space
Ｈ２１／Ａ１１

The cooperative system to built amodel of visual cognition

Kazuhiro Kondo
Graduate School of Science andEngineering. Yamagata
University
Satoshi Shioiri
Research Institute of ElectricalCommunication
Tohoku University

TaiichiOtsuji

Yukio
Iwaya
Satoshi
Shioiri

Ｈ２１／Ａ１３

Creation of Platform for Sustainable Osamu Takahashi
Information Society by Sensor-Cloud Future University-Hakodate
Systems
H２２／Ａ０１

Study on terahertz optoelectronic
devices using graphene

Ryzhii Victor
University of Aizu

TetsuoKinoshita

TaiichiOtsuji58

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2011 Nation-wide Cooperative Research Projects
Project Number
Research Project Theme

Project Leader

Facilitator
in RIEC

Ｈ２２／Ａ０２

Seiichi Miyazaki
Formation and Valency Control ofGraduate School ofGe-based Quantum Dots and Their
Engineering.
Application to Nanoscale Functional
Nagoya University
Memories

Jun-ichiMurotaＨ２２／Ａ０３

Tatsuki Oda
Computational Materials Design andCollege of Science andDevice Applications ofEngineering.
Magneto-electric and Magneto-elastic
Kanazawa University
Effects
Ｈ２２／Ａ０４
Yohtaro Umeda
Tokyo University of Science
Study on High-Efficiency
Faculty of Science andSwitching-Mode Power Amplifier withTechnology Electrical
InGaAs HEMTs
Engineering
Ｈ２２／Ａ０５
Yoichi Uehara
Research Institute of Electrical
Broadband light generation andCommunication
detection using electron tunnelingTohoku University
Ｈ２２／Ａ０６
Masakiyo Tsunoda
Graduate School of
Research of spintronics devices withEngineering,
negative spin-polarization materials
Tohoku University
Ｈ２２／Ａ０７

Masafumi
Shirai

Tetsuya
Suemitsu

YoichiUeharaMasafumi
Shirai

Chemical synthesis of pure Fe
nanoparticle assembly with highsaturation magnetization and its soft
magnetic properties

Migaku Takahashi
Graduate School ofEngineering,Tohoku University

KazushiIshiyama

Ｈ２２／Ａ０８

Tatsuya Hirahara
Toyama Prefectual University

Yôiti
SuzukiResearch on personal acoustic
telepresence system
Ｈ２２／Ａ０９

Akihiro Tanaka
ShuichiMultimodal speech communication
Waseda Institute for Advanced
Sakamoto
system based on human perceptualStudyproperty
Shin Fukudo
Yôiti
The Influence of a Natural Sound on Tohoku University School of
Suzuki
MedicalStress Responses
Ｈ２２／Ａ１０59

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2011 Nation-wide Cooperative Research Projects
Project Number
Research Project Theme
Ｈ２２／Ａ１１

Development of universal training
system using acoustic virtual reality
technique
Ｈ２２／Ａ１２

Directivity control on frequency
domain binaural model
Ｈ２２／Ａ１３

Study of Brainware Systems

Project Leader

Facilitator
in RIEC

Makoto Oh-uchi
Faculty of General
Management.
Tohoku Fukushi University

Yukio
Iwaya

Yoshifumi Chisaki
Kumamoto University

Yôiti
SuzukiToshiyuki Kanoh
NEC Corporation

Junji
Tada

Ryuji Igarashi
Administration Department
Fundamental Study to Obtain
Faculty of Engineering andUnderstanding on Working Network to
Resource Science,
Fully Make Use of the Knowledge
Akita University
Ｈ２２／Ａ１４Gen
Kitagata

Ｈ２２／Ａ１６

Advanced study on a real-world
Shigeru Fujita
oriented computing application based Chiba Institute of Technology
on the symbiotic computing
Ｈ２３／Ａ０１

Basis Establishment of Plasma
Nanobiotronics
Ｈ２３／Ａ０２

Optoelectronic devices using
carbon-based nanomaterials

TetsuoKinoshita

Rikizou Hatakeyama
Graduate School ofEngineering,Tohoku University

MichioNiwanoTakashi Uchino
Tohoku Institute of Technology

Jun-ichiMurotaＨ２３／Ａ０３

Development of the fabrication
Hiroshi Okamototechnique for atomically-controlled SiHirosaki University
and Ge-MIS structures and theevaluation technique of their interfaces

Jun-ichiMurotaＨ２３／Ａ０４

Highly-Strained and AtomicallyControlled Heterostructure
Formation of Group-IV
Semiconductors and Nanodevice

Jun-ichi Murota
Research Institute of Electrical Jun-ichi
Communication
MurotaTohoku University

Application60

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2011 Nation-wide Cooperative Research Projects
Project Number
Research Project Theme
Ｈ２３／Ａ０５

Study on the influence ofhetero-interface on the electricalcharacteristics of ultrathin
hetero-epitaxial layers
Ｈ２３／Ａ０６

Heterogeneous Network Roaming
Technology for Dependable Air

Project Leader

Facilitator
in RIEC

Toshiaki Tsuchiya
Shimane University
Interdisciplinary Faculty of
Science and Engineering

Jun-ichiMurotaNoriharu Suematsu
Research Institute of Electrical Noriharu
Communication
Suematsu
Tohoku University

Souta Hidaka
Spatial Perception and Multisensory Rikkyo University College ofContemporary Psychology
Integration
Ｈ２３／Ａ０７

Ｈ２３／Ａ０８

Haruyuki Kamiya

Yukio
Iwaya
MichioNiwanoSignal transduction of the artificial
neuronal network

Hokkaido University
Graduate School of Medicine
School of Medicine

Ｈ２３／Ａ０９

Fumihiko Hirose
Faculty of Egineering.
Yamagata University

MichioNiwanoDevelopment of magnetic devices
using thin film element with inchlined
stripe magnetic domain and its
applications

Hiroaki Kikuchi
Iwate University

KazushiIshiyama

Ｈ２３／Ａ１１

Hiroshi Shigeno
Keio Univercity
Science and Technology

Gen
Kitagata

A research on flexible,printableorganic heterojunction photovoltaic
devicesＨ２３／Ａ１０

Research on Infrastructure System for

Cyber-Physical Integrated Society
Ｈ２３／Ａ１２

Masashi ItohTwo-dimensional sound localization Tohoku Institute of Technology
based on a monaural input signal
Ｈ２１／Ｂ０１

Fundamental characteristics andapplications of innovative functional
field generated by various plasma flow

Akira Ando
Graduate School ofEngineering
Tohoku University

Yôiti
Suzuki
Maki
Suemitsu

61

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2011 Nation-wide Cooperative Research Projects
Project Number
Research Project Theme

Project Leader

Facilitator
in RIEC

Maki Suemitsu
Elucidation and Control of Graphene Research Institute of Electrical Maki
Suemitsu
Growth for its applications in the Communication
TohokuUniversity
next-generation devices
Ｈ２１／Ｂ０２

Ｈ２１／Ｂ０３

Small Power WirelessCommunications Systems

Shuzo Kato
Research Institute of Electrical Shuzo
Communication
Kato
Tohoku University

Akira Hirose
Complex Valued Neural Network for School of Engineering.
The University of Tokyo
Real Applications
Ｈ２１／Ｂ０４

Ｈ２１／Ｂ０５

Study on human performance with aview to designing human-friendly
information systems

Hirofumi Yanai
College of Engineering.
Ibaraki University

Ken-ichiro Tsutsui
Toward an interdisciplinary approach Graduate School of Life Science
Tohoku Universityof vision sciences
Ｈ２１／Ｂ０７
Toshio Ogino
Yokohama National
Novel Bioelectronic Devices Based on
University, Graduate School of
Combination of Nano andEngineering
Bio-technology
Ｈ２１／Ｂ０８
Ko Hosoda
Graduate School ofUnderstanding adaptive locomotion
Engineering
mechanism of biological system andOsaka University
its application to engineering
Ｈ２１／Ｂ０９
Hiroshi Matsuoka
Japan Atomic Energy Agency,
Evolution of high performance
Center for Computational
computing by non-volatile
Science & E-systems
bits-operation technologies
Ｈ２１／Ｂ１０
Isao Echizen
Research on Next-Generation Models National Institute ofInformatics
of Digital Content Distribution
Ｈ２１／Ｂ１１
Takahiro Hanyu
Research Institute of Electrical
New Paradigm VLSI System and Its
Communication
System Integration Technology
Tohoku University
Ｈ２１／Ｂ０６

ShigeoSato
Koji
Nakajima
Satoshi
Shioiri
MichioNiwanoAkio
Ishiguro
Takahiro
Hanyu
Yôiti
SuzukiTakahiro
Hanyu

62

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9:06:14

2011 Nation-wide Cooperative Research Projects
Project Number
Research Project Theme

Project Leader

Tetsu Mieno
Application and Basic Study of Fine National University
Particle Plasmas
Corporation SHIZUOKA
University

Facilitator
in RIEC

Ｈ２２／Ｂ０２

Ｈ２２／Ｂ０４

Photonics for novel interface of
bioinformation

MichioNiwanoKazuhiro Sakamoto
Research Institute of Electrical Kazuhiro
Communication Tohoku
Sakamoto
University

Shintaro Nomura
New Principle Nano Devices Based on Graduate School of Pure andNano-Scale Control of Fluctuation and Applied Sciences University ofTsukubaElectron Correlations
Ｈ２２／Ｂ０５

Hideo
Ohno

Ｈ２２／Ｂ０６

Toshiyuki Miyazaki
Research of large-format quantum
RIKEN
detector arrays with High-Q
microwave superconducting resonators
Ｈ２２／Ｂ０７
Yohei Ishikawa
Research Institute for
Challenge and Perspective for
Sustainable Humanosphere,
Millimeter Wave Applications
Kyoto University

ShigeoSato

Noriharu
Suematsu

Ｈ２２／Ｂ０８

Investigation of Bio-inspired
Information Theory
and its Technological Application
Ｈ２２／Ｂ０９Study on visual information ofmaterial surface properties
Ｈ２２／Ｂ１０

Program Verification
with Mathematical Logic

Daisuke Uragami
KazutoTokyo University of Technology Sasai
Katsunori Okajima
IchiroYokohama National University Kuriki
Masahiko Sato
Kyoto University

Atsushi Mase
Development and Application ofArt, Science and technology
Synthetic Aperture Radar System forCenter for Cooperative
Civilian Use
Research, Kyushu University
Ｈ２３／Ｂ０１
Makoto Sonehara
Dept. of Electrical andResearch for MEMS / high-frequency
devices with nano-structured magnetic Electronic Engineering,
Faculty of Engineering,materials for advanced
Shinshu University
communications equipments

Yoshihito
ToyamaＨ２２／Ｂ１１

HiroshiYasakaKazushiIshiyama

63

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2011 Nation-wide Cooperative Research Projects
Project Number

Project Leader

Research Project Theme

Facilitator
in RIEC

Ｈ２３／Ｂ０２

Heiji Watanabe
Research on the new concept large
Graduate School ofscale memory and its system withintegration of nano materials on silicon Engineering, Osaka University
technology
Ｈ２３／Ｂ０３
Kikuo Yamabe
Research on nano semiconductor
Graduate School of Pure andmaterials and nano structured devices Applied Sciences
required for future electronic systems
Tsukuba University
Ｈ２３／Ｂ０４
Kazushi Ishiyama
New Technologies for Reducing Iron
Research Institute of Electrical
Loss of Electrical Steels
Communication Tohoku
University
Jun-ichi Kushibiki
Study of functional piezoelectric
Graduate School ofmaterials and applications to advanced Engineeringcommunication devices
Tohoku University

TetsuoEndo

TetsuoEndo

KazushiIshiyama

Ｈ２３／Ｂ０５

Ｈ２３／Ｂ０６

Ultrafast Coherent Lightwave
Control Technologies for Ultimate
Communication and Measurement
Systems

Hidemi Tsuchida
National Institute of Advanced
Industrial Science andTechnology

Yasuo
Cho

Masataka
Nakazawa

Hiroaki Muraoka
Research on Next-generation Peta-byte Research Institute of Electrical Hiroaki
Information Storage
Communication Tohoku
Muraoka
University
Ｈ２３／Ｂ０７Ｈ２３／Ｂ０８

Passive/Active Circuit Technologies
and Their Applications
for Next Generation RFIC
Ｈ２３／Ｂ０９Multisensory integration
self-body motion

involving

Toshio Ishizaki
Faculty of Science
And Technology.
Ryokoku University

Noriharu
Suematsu

Kenzo Sakurai
Faculty of liberal arts.
Tohoku Gakuin University

Yôiti
Suzuki

Yoshifumi Kitamura
Next Generation Human Interface for Research Institute of Electrical Yoshifumi
Interactive ContentsCommunication Tohoku
Kitamura
University
Ｈ２３／Ｂ１０64

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2011 Nation-wide Cooperative Research Projects
Project Number
Research Project Theme

Project Leader

Kazuhiko Kato
Graduate School of Systems
Foundation of Dependable Cloudand Information Engineering
System with a Highly Reliable
Tsukuba University
Programming Language System
Ｈ２１／Ｓ０１
Masayuki Numao
The Institute of Scientific andInformation processing andIndustrial Research (ISIR)
communication system based on an
innovative new concept associated with Osaka University
human functions

Facilitator
in RIEC

Ｈ２３／Ｂ１１

AtsushiOhhori

Masafumi
Shirai

Ｈ２３／Ｓ０１

Hidenori Mimura
Development of essential technologies Shizuoka University
Research Institute of
directed to systematization ofElectronics
superhivision
Ｈ２３／Ｓ０２

Spintronics International Alliance
Ｈ２３／Ｓ０３

Collaborative Research on
Nano-electronics

Kohei Itoh
Keio University Science andTechnology

Yôiti
Suzuki

Hideo
Ohno

Tetsuya Osaka
MichioWaseda Univ. Institute for
NiwanoNanoscience & Nanotechnology

65

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2011 Symposium
5. Symposium Organized by the InstituteThis Symposium is planned to exchange relevant information on current important
topics concerning Electrical Eng., Electrical Communications, Electronic Eng., andInformation Eng. Many related researchers inside and outside Tohoku University
participate the Symposium and stimulate discussion.

1

Symposium In Past
Title

Date

Quantum Electronics of Liglht Waves and Micro Waves

Feb. 6- 8, 1964

Magnetic Recording

Feb.14-15, 1964

2 Ultra-High Frequency Acoustelectronics

Feb.11-12, 1965

3 Artificial lntelligence

Mar. 8- 9, 1966

4 Thin Film Electronics

Jan.26-27, 1967

5 Crystal GrowthDec. 19-20, 1967

6 1968 Sendai Symposium on Acoustelectronics

Aug.19-20, 1968

7 Current Status and Future Trends of Superconductivity

Jan.22-24, 1970

8 Speech Information Processing

Feb.24-26, 1971

9 Surface Acoustic Wave Technology

May 25-26, 197210

Liquid Crystals · Their Molecular Orientations and Application to
Display Devices

11 Computer Network
12

The Memorial Symposium on the 40th Anniversarv of the Foundation of
RIEC

Dec.13-14, 1974
Mar.17-18, 1975
Sep.25-26, 1975

13 Application of Amorphous Ferromagnetic Materials

Mar.10-11, 1977

14 Stoichiometry of Compound Crystals

Nov.24-25, 1977

15 Submillimeter Waves

Nov.16-17, 1978

16 Solid State Chemical Sensors

Feb. 1- 2, 1980

17 Graph Theory and Algorithms

Oct.24-25, 1980

18 Perpendicular Magnetic Recording

Mar.11-12, 1982

19 Approach to Optical Computer

Mar.10-11, 1983

20 Plasma Non-Linear Phenomena - Basic Problems for Fusion Plasmas

Mar. 8- 9, 1984

21 New Computer Architecture

Jul.25-26, 1985

22 Guided Wave Technology and Its Application at Mid-Infrared

Mar.13-14,1986

23 Physics and Applications of Tunnelling Phenomena

Mar.12-14, 1987

24 Biomagnetics and Bioelectronics

Feb.26-27, 1988

25 Ultrasonic Electronics - New Applications of Piezoelectricity

Feb. 2- 3, 1989

26 Boundaries between Light and Electromagnetic Wave

Feb. 1-2, 199067

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2011 Symposium
27 Issues and Realization of Pattern Recognition and Understanding

Feb.28-Mar.1,1991

28 Discrete Algorithms

Oct.17-18, 1991

29

Perspective for New Computing Paradigm

Feb. 4- 5, 1993

Current Status and Future Prospects of System Control

Mar. 3- 4, 1993

30 Future Prospects of Electron Beam Devices

Nov. 1- 2, 1993

31 Discharge and EMC

Dec.20-21, 1994

32 Statistical Physics and Information Science

Mar.22-23,1995

33 Photo-and Plasma-Excited Processes on Surfaces

Nov.30-Dec.1,1995

34 Nano Spinics and Power Electronics

Feb.15-16, 1996

35 Potential Formation and Related Nonlinear Phenomena in Plasmas

Sep.17-19, 1996

36 New Trend in Ultrasonic Measurements

Feb. 3- 4, 199737

Toward the Realization of the High-Definition Multi-Media
Communication

Nov. 4- 6, 199768

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2011 SymposiumInternational Symposium Organized by the Institute
Title
1
2

Intrinsic Josephson Effect and THz Plasma Oscillation in High Tc
Superconductors
Design and Architecture of Information Processing Systems Based on
The Brain Information Principle

3 Novel Techniques and Applications of Millimeter-Waves
4
5

The International Joint Conference on Silicon Epitaxy andHeterostructures
International Workshop on Photonic and Electromagnetic Crystal
Structures

Date
Feb.23-25, 1997
Mar.16-18, 1998
Dec.14-16, 1998
Sep.13-17, 1999
Mar.8-10, 2000

6 Physics and Application Spin Related Phenomena in Semiconductors

Sep.13-15, 2000

7 Rewriting in Proof and Computation

Oct.25-27, 2001

8 Nonlinear Theory and its Applications

Oct.28-Nov.1,
2001

9 New Paradigm VLSI Computing

Dec.12-14, 2002

10 Ultra High Density Spinic Storage System

Oct.23-24, 2003

11 3rd International Workshop on New Group IV (Si-Ge-C) Semiconductors

Oct.12-13, 2004

12
13
14
15
16
17
18
19

3rd International Workshop on High Freaqency Micromagnetic Devices
and Materials (MMDM3)
4th International Conference on Silicon Epitaxy and Heterostructures(lCSl-4)
1st International WorkShop on New Group IV Semiconductor
Nanoelectronics
GSIS International Symposium on Information Sciences of New Era:
Brain, Mind and Society
The 1st RIEC International Workshop on Spintronics -Spin Transfer
Phenomena4th International Workshop on High Frequency Micromagnetic Devices
and Materials (MMDM4)
4th International Conference on Physics and Applications of
Spin-Related Phenomena in Semiconductors (PASPS-lV)
2nd International Workshop on New Group IV Semiconductor
Nanoelectronics

Apr.11-12, 2005
May 23-26, 2005
May 27-28. 2005
Sep.26-27, 2005
Feb.8-9, 2006
May 8,2006
Aug.15-18,2006
Oct.2-3,2006

20 2nd RIEC International Workshop on Spintronics

Feb.15-16,2007

21 Japan-China Joint Conference on acoustics, JCA2007

Jun.4-6,2007

22

International Conference on Discovery Science/
International Conference on Algorithmic Learning Theory

Oct.1-4,2007

69

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2011 Symposium
23 The 3rd RIEC International Workshop on Spintronics
24

3rd International Workshop on New Group ⅣSemiconductor
Nanoelectronics

25 International Workshop on Nanostructures & Nanoelectronics
26

Oct.
31-Nov.1,2007
Nov.8-9,2007
Nov.21-22,2007

The 18th International Symposium on Algorithms andDec.17-19,2007
Computation(ISAAC2007)
International Interdisciplinary-Symposium on Gaseous and Liquid27
Sep.5-6,2008
Plasmas (ISGLP 2008)
4th International Workshop on New Group IV Semiconductor28
Sep.25-27,2008
Nanoelectronics
29 The 4th RIEC International Workshop on Spintronics

Oct.9-10,2008

30 Global Symposium on Millimeter Waves 2009 (GSMM2009)

Apr.20-22,2009

31 Mini R.I.E.C. workshop on multimodal perception

Apr.24,200932 The 4th International Symposium on Ultrafast Photonic Technologies

Aug.4-5,2009

PIMRC2009 Personal Indoor and Mobile Radio Communications
Symposium 2009
2nd RIEC-CNSI Workshop on Nanoelectronics,Spintronics and Photonics
34(5th RIEC Symposium on Spintronics)
International Workshop on the principles and applications of spatial
35
hearing 2009 (IWPASH2009)
5th International Workshop on New Group IV Semiconductor
36
Nanoelectronics
33

Sep.13-16,2009
Oct.22-23,2009
Nov.11-13,2009
Jan.29-30,2010

37 6th RIEC International on Spintronics

Feb.5-6,2010

38 2nd International Workshop on Nanostructure & Nanoelectronics

Mar.11-12,2010

39 2nd RIEC International Symposium on Graphene Devices (ISGD2010)

Oct.27-29,2010

40 9th Japan-Korea Symposium on Surface Nanostructures

Nov.15-16,2010

41 The 7th RIEC International Workshop on Spintronics

Feb.3-4,2011

42

The 42nd RIEC International Symposium
12th International Multisensory Research Forum (IMRF2011)

Oct.17-20,2011

43 The 8th RIEC International Workshop on Spintronics

Feb.2-3,2012

44 The Sixth International Symposium on Medical, Bio- and Nano-Electronics

Mar.8,2012

45 3rd International Workshop on Nanostructures & Nanoelectronics

Mar.21-22,201270

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2011 Study Groups on Electrical Communication
6. Study Groups on Electrical Communication
Study Groups on Electrical Communication are organized to solve scientific and technologicalproblems and to promote research and development through the collaboration of the ResearchInstitute of Electrical Communication, Depts. of Electrical Eng., Electrical Communications,Electronic Eng., Information Eng., and related scientists and engineers inside and outside Tohoku
University. The Study Groups on Electrical Communication consist of 15 Sub-Groups as listed
below, to deal with specific subjects. Each Sub-Group holds workshops. The abstracts of theworkshops are published annually in The Record of Electrical and Communication Engineering

Conversazione Tohoku University.
Many scientists and engineers－not only from universities but also from government laboratories
and industries－attend the workshops, present papers, and discuss issues actively. We are pleased
to provide information on these activities upon request. Please contact each Sub-Group Chairman
or manager for general information or more specific questions.

Electromagnetic and Optical Waves Engineering
Chair

Prof.

Kunio Sawaya

Manager

Associate Prof.

Qiang Chen

Acoustic Engineering
Chair

Prof.

Akinori Ito

Manager

Associate Prof.

Yukio Iwaya

Sendai "Plasma Forum"
Chair

Prof.

Rikizo Hatakeyama

ManagerProf.

Akira Ando

Sendai Seminar on EMC
Chair

Prof.

Hideaki Sone

ManagerProf.

Masahiro Yamaguchi

71

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2011 Study Groups on Electrical Communication
Computer Science
Chair

Prof.

Manager

Associate Prof.

Ayumi Shinohara
Eijiro Sumii

Systems Control
Chair

Prof.

Manager

Associate Prof.

Makoto Yoshizawa
Noriyasu Homma

Information-biotronics
Chair

Prof.

Michio Niwano

ManagerProf.

Tatsuo Yoshinobu

Chair

Prof.

Hiroaki Muraoka

Manager

Associate Prof.

Kenji Nakamura

Manager

Assistant Prof.

Kousaku Miyake

Spinics

New Paradigm Computing
Chair

Prof.

Manager

Associate Prof.

Michitaka Kameyama
Masahide Abe

Ultrasonic Electronics
Chair

Prof.

Manager

Associate Prof.

Hiroshi Kanai
Hideyuki Hasegawa

72

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2011 Study Groups on Electrical Communication
Brainware
Chair

Prof.

Manager

Associate Prof.

Koji Nakajima
Shigeo Sato

Mathematical Physics and its Application to Information Sciences
Chair

Prof.

Kazuyuki Tanaka

ManagerProf.

Kazuyuki Tanaka

Biocybernetics and Bioinformatics
Chair

Prof.

Manager

Assistant Prof.

Satoshi Shioiri
Takeshi Obayashi

Nanoelectronics and Spintronics
Chair

Prof.

Manager

Associate Prof.

Junichi Murota
Masao Sakuraba

Advenced Information Communication Engineering
Chair

Prof.

Tetsuo Kinoshita

ManagerProf.

Takuo Suganuma

73

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2011 International Activities
7.

International Activities

Many of the staff in RIEC contribute to the development of technology and science inthe world by serving as editors of referees of international journals or by chairing or
programming international conferences. In some fields in electronics, electricalcommunications, or information engineering RIEC serves as a Center of Excellence(COE), which attracts many visiting researchers and students from all over the world
every year. Several academic exchange programs with foreign colleges or institutes arein operation.
International academic exchange programs:
The Institute of Physics, Polish Academy of Sciences (Poland)
The Faculty of Science, Chulalongkorm University (Thailand)
Harbin Institute of Technology (China)
The James Frank Institute, The University of Chicago (U.S.A.)
Queen Mary and Westfield College, University of London (U.K.)
Scientific Research Department, Shenzhen University (China)
Institute of Information and Communication Technology, Sung-Kyun-Kwan University (Korea)
Institute of Materials Science, Faculty of Applied Physics, University of Twente (Netherlands)
The Institute of Radioengineering and Electronics Russian Academy of Sciences (Russia)
Department of Electronics Science and Engineering, University of Nanjing (China)
School of Computer and Communication Engineering, Taegu University (Korea)
The Interdisciplinary Center on Nanoscience of Marseille, National Center of Scientific Research (France)
IHP-Innovations for High Performance microelectronics (Germany)
Institute of Semiconductors Chinese Academy of Sciences (China)
WINLAB, Rutgers University (U.S.A.)
University of Vigo (Spain)
State University of New Nork (U.S.A)



















International journals in which a staff in RIEC participates as an editor:
1

Acoustical Science and Technology

2

Applied Acoustics

3

Higher-order and Symbolic Computation

4

IEICE Electronics Express

5

IEICE Trans．on Electronics

6

Interdiscipliary Information Science

7International Journal of Artificial Intelligence, Neural Networks, and Complex
Problem Solving Technologies

8International Journal of Computer Science and Network Security

9

International Journal of Energy, Information and Communications

10

International Journal of Information Sciences and Computer Engineering (IJISCE)

75

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2011 International Activities
11

Journal of Ambient Intelligence and Humanized Computing

12

Journal of Communications and Networks

13

Journal of Magnetics Korean Magnetics Society

14

Journal of SPIN

15

Nature Communications

16

Nonlinear Theory and Its Applications, IEICE

17

NPG Asia Materials

18

Optical Fiber Technology

19

The Journal of Computer Animation and Virtual Worlds

20

Virtual Journal of Nanoscale Science and Technology

Recent international conferences programmed by a staff in RIEC:
1

10th Asia Pacific Conference on Computer Human Interaction（APCHI2012）2

12th Joint MMM/Intermag Conference3

15th International Symposium on the Physics of Semiconductors andApplications（ISPSA）

4

16th OptoElectronics and Communications Conference（OECC2011）

52011 Conference on Lasers and Electro-Optics（CLEO2011）

62011 Spintronics Workshop on LSI

782012 Conference on Lasers and Electro-Optics（CLEO2012）/Technical Program
Committee Member
2nd CSIS International Symposium on Spintronics-based VLSIs and 8th RIECInternational Workshop on Spintronics

9

5th International Workshop on Spin Currents

10

6th Advances in Computer Entertainment Technology Conference（ACE2010)11

6th Annual ACM Conference on Interactive Tabletops and Surfaces（ITS2011）

12
13
14
15

6th International School and Conferece on Spintronics and Quantom Information
Technology（SPINTECH6）
ACM Symposium on Virtual Reality Software and Technology（VRST)ACSIN：11th International Conferrence on Atomically Controlled Surfaces，Interfaces
and Nanostures
Asia Pacific Microwave Conference（APMC)

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2011 International Activities
16
17
18

Asia Pacific Vision Conference 2013
AWAD：Asia-pacific Workshop on Fundamentals and Applications of Advanced
Semiconductor Devices
CIMTC：4th International Conferrence on Smart Materials，Structures andSystems

19

ESSDERC：European Solid-State Device Research Conference

20

European Conference on Optical Communication(ECOC)

21

ICSFS：16th International Conferrence on Solid Films and Surfaces

22IEEE International Symposium on Asynchronous Circuits and Systems

23

IEEE International Symposium on Multiple-Valued Logic

24

IEEE Symposium on 3D User Interfaces （3DUI)

25

International Multisensory Research Forum（IMRF)2011

26

International Multisensory Research Forum（IMRF）2012

27

International Quantum Electronics（IQEC），Program Subcommittee Member for
Quantum Information

28

International Symposium on Nonlinear Theory and its Applications

29

ISCS：International Symposium on Compound Semiconductors

30

Joint Polish-Japanese Workshop，Spintronics-from NewMaterials to Applications

31

OTST：Int．Conf on Optical Terahertz Science and Technology

32

SPIE International Conference on Defense，Security，and Sensing

33

SPIE Photonics West，Physics and Simulation of Optoelectronic Devices

34
35
36
37
38

The 11th IEEE International Conference on Cognitive Informatics and Cognitive
Computing（ICCI*CC 2012）
The 15th International Conference on Network-Based Information Systems(NBiS-2012)
The 1st International Workshop on Smart Technologies for Energy,Information andCommunication (STEIC2012)
The 2012 IEEE/WIC/ACM Intern． Joint Conference on Web Interlligence andIntelligent Agent Technology （WI-IAT2012）
The 22th Intern． Conf． Industrial & Engineering Applications of Artif. Intell. &Exp. Systems (IEA/AIE-2012)77

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2011 International Activities
39

The 5th International Symposium on Adaptive Motion of Animals and Machines

40

TWHM：Topical Workshop on Heterostructure Microelectronics

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2011 Periodicals Published by the Institute8.

Periodicals Published by the Institute

The Institute publishes the following two periodicals to inform readers on recent research results of
the Institute.

1. The Record of Electrical and Communication Engineering Conversazione Tohoku University
This journal aims at providing an opportunity to publish research results of the Institute as well as
the result of the Departments of Electrical Engineering, Communication Engineering, Electronics
Engineering, and Information Engineering of the Faculty of Engineering. Since the journal also aims
at publishing general research activities of the Institute and of the Departments such as records of the
final lectures of retiring professors, records of the Institute Symposium, and reviews.
The name of the Journal ‘Conversazione’ is attributable to the ‘Tuesday Conversazione’ at the
Department of Electrical Engineering, which had been held once a week on Tuesday since around 1920.
Minutes of the meetings had been distributed to researchers outside of the University via various
routes and therefore some of them had been referred to as 'Records of Tuesday Electrical Engineering
Conversazione Tohoku University' with the result that they came to be treated as official publications.
Though the meeting was once interrupted by World War Two, it was restarted in 1947. In 1952, thepublication of the records was succeeded by the Institute and the records have been published asperiodicals, two or three times a year recently, since No. 1 Vol. 21 was published in July, 1952.

2. The Annual Report of Research Activity at the Research Institute of Electrical Communication,
Tohoku University
Published annually since 1995. This report details the activities of each research division and researchfacility. Also included are reports on nation-wide co-operative research projects, international
symposium and seminars organized by members of RIEC, and the reports and evaluation on the RIEC
advisory board members. English edition(digest version of Japanese edition) has been published since
2007.

3.RIEC News
With the 75th anniversary of the establishment of RIEC, RIEC News introduces cutting-edge's

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2011 Periodicals Published by the Instituteresearch and the vision of the future from RIEC's contributions to the progression of science andtechnology in Japan.

Since the launch in March 2011 to March 2012, four issues have been published.

Every issue introduces special topics such as large scale projects and the establishment of the
Research Organization of Electrical Communication (ROEC), etc. RIEC News also includes current
information about each laboratory and center, all kinds of RIEC events, research exchange meetings,
laboratories open to the public (RIEC Open Day), etc. Further, RIEC News offers a notification
service by mail whenever a new issue is released and an electronic version of every issue published so
far can be downloaded by following the link below.
http://www.riec.tohoku.ac.jp/riecnews/80

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2011 Staff, Land and Buildings, Budget
9．Staff, Land and Buildings, Budget
1. Staff(2012.5.1)

Classification
Division

Research
Laboratory
Laboratory Center for Fundamen
for
for
tal
21st
Nanoelectro
BrainwareTechnology
century
nics andsysystems Information
CenterSpintronics
Technology

Professors

19

3

Associate Professors

15

3

Assistant Professors

15

3

6

Research Fellows

19

2

1

Administration
Office

3

25
18
24
22

Technical Officials

113Administrative Officials
Total

68

Total

11

10

0

13

14

16

16

17

119

2.Land and Buildings
Site:
Total building area:
Total floor area:
Name of Buildings
Building No.1

Katahira 2-1-1, Aoba-ku, Sendai 980-8577, Japan2
12,913m
2
28,776m
Structure
Reinforced Concrete, 4 floors(2012.5.1)
Year of Completion Floor Area
Building-S:1962,1963
Building-N:1959,1960

2

7,772mBuilding No.2
Reinforced Concrete, 4 floors
Laboratory for Nanoelectronics and Steel-flame, 5 floors
Spintronics

1962, 1963

7,085m2004

7,375mLaboratory for Brainware
sysystems

Reinforced Concrete, 1 floor

1967, 1968, 1972

Reinforced Concrete(partly steel-flame), 2 floors

1986

Steel-frame 1 floor

1996

Light-weight steel-frame, 2 floors

1999

Reinforced Concrete, 3 floors

1930

Steel-frame 1 floor

2002

Evaluation and Analysis Center

Reinforced Concrete, 2 floors

1981

Helium Sub-Center

Reinforced Concrete(partly light-weight steel-flame), 1 floor

1972

Machine Shop

Reinforced Concrete(partly light-weight steel-flame), 1 floor

1965, 1966, 1978

Research Center for 21st century
Information Technology

2
2
2

525m

2

1,553m

2

598m

2

147m

2

1,343m

2

435m

2

790m

2

166m

2

479m

Others

2

508m

Total

2

28,776m

3.BudgetFinancial Year

(Unit:1,000yen)

Personnel
Expenditure

Supplies
Expenditure

Research Grant
Ministry of
Education,Science andCulturePartnership Between
Universities andIndustry

Leading-edge Research
Promotion Fund

total

2007

970,961

813,724700,615

888,833

0 3,374,133

2008

879,481

953,000

694,883

1,069,832

2009

1,026,511

1,562,318

605,100

798,053

2010

777,776

735,496

418,680

962,712

0 3,597,196
400,440 4,392,422
1,034,827 3,929,491

2011

835,898

1,174,027

469,840

1,122,944

813,777 4,416,486

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2011

10．Afterword
These days, one often hears it said that it is important for a university toestablish a distinctive character. While this may be achieved in a variety ofways, I believe the existence of affiliated research institutes carries
considerable weight, as their activities, developed over many years, aredeeply rooted in the university’s traditions and culture. Further, it is a keytask of these research institutes to lay the foundation of the next-generation
information industry through technological development firmly rooted in thedepth of knowledge that only a university can provide.
From its early work with weak currents, RIEC began life as a primarily
device-oriented research laboratory; we have since added software
technologies, and today our integrated research covers the whole range frommaterials to information services. Most recently, utilizing the perspective
offered by information and communications, we are undertaking cutting-edge
research and development in areas as diverse as artificial hearts and the
movements of living organisms. To further our collaborative research, we also
hold a series of research exchange meetings to improve contact among RIEC’s
nearly thirty laboratories, with the aim of overcoming compartmentalization
among the four Research Divisions and the individual institutes and centers
and thus creating new R & D partnerships and synergies. Readers of thisAnnual Report will see signs of these initiatives beginning to germinate. The
report also includes the results of the Support Program for Creative Researchfor young researchers, which I trust will be of interest.
We would be delighted to receive feedback from readers of this Report.
Perhaps the contents do not reflect our new direction as well as we hoped? Or
perhaps you would like to suggest some interesting new line to pursue. Allcomments will be greatly appreciated, and I look forward to your continuing
support and encouragement.

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Research Institute of Electrical Communication
Tohoku University
2-1-1Katahira, Aobaku, Sendai 980-8577, Japan
Tel. +81-(0)22-217-5422 Fax. +81-(0)22-217-5426
http://www.riec.tohoku.ac.jp/

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Annual Report 2011

Annual Report 2011

Research Institute of Electrical Communication, Tohoku University

Research Institute of Electrical Communication, Tohoku University

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