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Feature Innovative nanophotonics: Integrating quantum light sources with nanofibers for quantum internet applications

News and Events
 Second Moscow Institute of Physics and Technology - University of Electro-Communications (MIPT-UEC) Joint
Workshop on Optical Science The 2nd Global Alliance Lab between Tamkang University and University of Electro-Communications

Research Highlights
 Next generation mobile communications: World's first successful use of an electric circuit to compensate for
distortions in electric signals due to heat Magnetic vortices: Controlling core switching in Pac-man disks
 Underwater robotics: Analyzing the propulsion of a soft robotic fish Artificial intelligence: Brain-training for baseball robot

Topics Eyes on the sky: Monitoring effects of solar activity on aurora and global positioning systems
 The FoodCam: Smart phone application for real time food recognition for personalized healthcare Intelligent robotics: The ultimate automatic door system Letter From Alumni

The University of Electro-Communications 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585© 2014 The University of Electro-Communications.

Innovative nanophotonics: Integrating quantum light sources with nanofibers
for quantum internet applications
Professor Kohzo Hakuta
Director of the Center for Photonic Innovations, University of Electro-Communications(UEC)"I had the idea for 'nanofiber quantum photonics' about 14 years ago," says Kohzo Hakuta,
Director of the Center for Photonic Innovations at the University of ElectroCommunications (UEC). "I want to integrate quantum light sources e.g. single quantum

Professor
Kohzo Hakuta

dot / single atom, into specially designed nanofibers. This 'fiber in-line technology' holds
the potential to revolutionize distributed quantum networks for secure, ultra-high speed communication.
Namely, the birth of the 'quantum internet. We are supported by Japan Science and Technology Agency
through Strategic Innovation Program."
Fiber in-line technology is advantageous for integrating these sources to theconventional fiber-based communication network.
Now, Hakuta and his group at the Center for Photonic Innovations are addressing thefollowing issues to develop fiber in-line technology to integrate quantum lightsources into optical nanofibers. Fabrication of high efficiency tapered glass

Group photo of the teamnanofibers; development of reproducible methods for integrating single quantum dots with nanofibers;
integration of cavity structures with nanofibers; and experimental demonstration of cavity quantum
electrodynamics (QED) with nanofibers. The work is carried out by an international group of researchers fromcountries including India, Vietnam, China and New Zealand.
"We have been working with our industrial partner Ishihara Sangyo Inc. to develop equipment for producing
tapered nanofibers," explains Hakuta. "The resulting 400 nm diameter tapered fibers have 99% lighttransmission."
A critical technology is to pick up single quantum dots from colloidal solution and deposit it on the nanofiber.
This is accomplished using a computer controlled pico-liter liquid dispenser combined with an inverted
microscope and precision translation stages. Photon counting experiments show the realization of single
quantum dot deposition with spatial accuracy better than 3μm, and importantly, the maximum photon
channelling efficiency is measured to be 22.0% as predicted from the theory.

The University of Electro-Communications 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585© 2014 The University of Electro-Communications.

Furthermore, Hakuta and colleagues have developed a novel method to enhance this photon channelling
efficiency by incorporating cavity structures. They are developing two methods. "On one hand, we canproduce photonic crystal nanofibers with an array of thousands of highly ordered nano-craters using femto
second lasers" explains Hakuta. "We were surprised to find highly periodic craters produced on the shadowsides of the nanofibers. Promptly we understood, it is due to the lensing effect of the nanofiber itself. On theother hand we are developing composite nanofiber cavities with external nano-grating structures". Using thesecomposite nanofiber cavities they have demonstrated cavity QED with single quantum dots.
This research has the potential of being a new paradigm in cavity QED, and forms the basis for quantum
internet and other applications. Furthermore, femto-second laser fabricated photonic crystal nanofiber cavities
coupled with cold atoms can realize various manipulation methods of single photons which offer the basic
tools for the next generation of internet communications.
References
1. R. R. Yalla, M. Sadgrove, K. P. Nayak, and K. Hakuta. "Cavity quantum electrodynamics on a nanofiberusing a composite photonic crystal cavity," Phys. Rev. Lett. 113, 143601 (2014).
2. K. P. Nayak, P. Zhang, and K. Hakuta, "Optical nanofiber based photonic crystal cavity," Opt. Lett. 39, 232(2014).
3. M. Sadgrove, R. R. Yalla, K. P. Nayak, and K. Hakuta. "Photonic crystal nanofiber using an external
grating," Opt. Lett. 38, 2542 (2013).
4. K. P. Nayak and K. Hakuta, "Photonic crystal formation on optical nanofibers using femtosecond laser
ablation technique," Opt. Express 21, 2480 (2013).
5. R. R. Yalla, Fam Le Kien, M. Morinaga, and K. Hakuta, "Efficient channeling of fluorescence photons
from single quantum dots into guided modes of optical nanofiber," Phys. Rev. Lett. 109, 063602 (2012).
6. R. R. Yalla, K. P. Nayak, and K. Hakuta, "Fluorescence photon measurements from single quantum dots on
an optical nanofiber," Opt. Express 20, 2932 (2012).
Website: http://www.cpi.uec.ac.jp

The University of Electro-Communications 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585© 2014 The University of Electro-Communications.

SEM image of a photonic crystal nanofiber fabricated with femto-second laser. Nanofiber diameter is around 600 nm. Thousandsof equidistant nano-craters are fabricated on a nanofiber by irradiating a single femtosecond laser pulse. [Opt. Express 21, 24802490 (2013)]

Composite photonic crystal cavity formed by combining an optical nanofiber and a nanofabricated grating. The PL intensity
spectra of single quantum dots show strong enhancement at the cavity resonance demonstrating the cavity QED effect. [Phys. Rev.
Lett. 113, 143601 (2014)]

The University of Electro-Communications 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585© 2014 The University of Electro-Communications.

Second Moscow Institute of Physics and Technology - University of ElectroCommunications (MIPT-UEC) Joint Workshop on Optical Science
The international MIPT--UEC Joint Workshop on Optical Science (Moscow
Institute of Physics and Technology, Moscow, Russia and University of ElectroCommunications, Tokyo) was held at the University of Electro-Communications
from 16th to 21th October, 2013. Since the first MIPT-UEC Joint Workshop washeld in Moscow in October 2013, this was the second joint workshop held by theuniversities. This workshop was organized to promote academic exchange andParticipants in the workshop

international cooperation between the universities.
The participants in this workshop included six professors and eight students from
MIPT, and more than 40 professors and students from UEC. After the
introductions of each universities, there followed 32 oral presentations and active
discussion on optical science and related fields.
In addition to the oral presentations, poster sessions and laboratory tours were

Snapshot of the workshop

held during the workshop. The MIPT participants visited the education facility of
UEC and the laboratories of UEC research groups. The students of MIPT and
UEC went on a half-day excursion to the center of Tokyo to promote mutual
understanding and cultural exchange between students. The workshop was
fruitful for all the participants to promote future international collaboration
between the two universities. The next MIPT-UEC joint workshop is scheduled
to be held in Moscow in October 2015.

MIPT delegates visiting theundergraduate student
laboratory room.

The University of Electro-Communications 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585© 2014 The University of Electro-Communications.

The 2nd Global Alliance Lab between Tamkang University and University ofElectro-Communications
The 2nd Global Alliance Lab (GAL) between Tamkang University (TKU, Taiwn) and University of ElectroCommunications (UEC, Tokyo) was set up at both universities on 24th October 2014 with the help of the
Office for Advanced IT and Global Creative Engineering Education at UEC. The main scheme of the TKU UEC GAL includes international collaboration in academic activities such as bi-directional students exchange
programs, internships, exchange of special lectures by the faculties as well as international collaboration
research.
This special international lab is organized by the steering committee (Fig.2) and a Joint Degree Program willbe also be a goal in the future.

Fig.1 Signing ceremony was held at the Intelligent
Automation and Robotics Center between TKU and UEC:
Prof. Wan-chin Tai (right), TKU Vice President forInternational Affair, and Prof. Hisayuki Aoyama (left) as aproxy of UEC Vice President, Prof. Kouki Abe.
(Photo by Intelligent Automation and Robotics Center)Fig.2 Steering committee member of "TKU - UEC
GAL": Prof. Wan-chin Tai. Vice President forInternational Affair, Prof. Ho, Chii-Dong, Dean,
College of Engineering, Prof. Ching-Chang Wong,
Prof. Ching-Tang Hsieh, and Prof. Wei-Tsong Lee,
Faculty of Engineering.

One of the unique features of GAL is that both universities can set up one room/lab for themselves on eachother's campus for use by faculty, researchers and students to expedite their missions. The TKU - UEC GAL
conducts continuous international collaboration activities for each other. Since 2009 students from both
universities have collaborated to design, develop, and complete an internet-based cross-over style remotecontrol robot system (Fig.3 and Fig.4) with the financial support of UEC CADET project.

Fig.3 Internet-based cross-over style team work
competition for international project training.

Fig.4 Students from both UEC and TKU discussing
the development of the internet-based
remote control system.
(Photo by Intelligent Automation andRobotics Center)

The University of Electro-Communications 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585© 2014 The University of Electro-Communications.

Prof. Ching-Chang Wong, Director of Intelligent Automation and Robotics Center (TKU) is a leader of one of
the famous robot teams of the FIRA Robot Soccer Cup Competition. The team has received many awards atrobot competitions. There are plans to open other GALs in Thailand, Russia, China, France, and USA.

The University of Electro-Communications 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585© 2014 The University of Electro-Communications.

Next generation mobile communications: World's first successful use of anelectric circuit to compensate for distortions in electric signals due to heat
As circuits become smaller and more densely populated with circuit elements, electrical characteristics of thecomponents become more prone to the influence of the heat generated. "The interaction between thermal andelectrical phenomena is one of the most troublesome problems in analog and digital integrated circuits,"
explain Ryo Ishikawa, Junichi Kimura and Kazuhiko Honjo from the University of Electro-communications in
Chofu-shi, Japan.
In this paper, the researchers report on the world's first method to compensate the disturbed electricalcharacteristics by using an electric circuit that cancels signal distortion caused by thermal behaviour of aheterojunction bipolar transistor. This research should help design devices that are better equipped to handle
heat effects.
A modulated high-frequency signal is distorted by the thermal behaviour through complex intermodulation
phenomena, although the temperature response of the circuit is slow. The researchers modelled the thermal
effects of a heterojunction bipolar transistor in an integrated circuit using thermal resistors and thermal
capacitors. The circuit elements were arranged in a 'ladder circuit' comprising repeating units of thermal
resistors and thermal capacitors. To compensate the signal distortion on the integrated circuit, an electric'ladder circuit' was connected.
Although the validity of the electric ladder circuit to compensate thesignal distortion has already been confirmed by experiments andsimulations, a theoretical derivation for the behaviour has so far beenlacking. Honjo and his team derived nonlinear expressions describing thecircuit parameters, and solved the expressions using series expansions.
The model compared well with experiments and simulations.
Experiments for an InGaP/GaAs heterojunction bipolar transistor power
amplifier operating at 1.95GHz provide compelling validation for theiranalytical design, emphasising its potential for designing circuits that cope
better with heat effects.
1.

A fabricated InGaP/GaAs heterojunction
bipolar transistor amplifier at 1.95 GHz
including a thermal memory effectcompensation circuit.

Ishikawa R, Kimura J and Honjo K Analytical design method for a low-distortion microwave InGaP/GaAs HBTamplifies based on transient thermal behaviour in a GaAs substrate IEEE Transactions on components,
packaging and Manufacturing Technology 3, 1705-1712 (2013) doi: 10.1109/TCPMT.2013.2262504

The University of Electro-Communications 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585© 2014 The University of Electro-Communications.

Magnetic vortices: Controlling core switching in Pac-man disks
Magnetic vortices in thin films can encode information in the perpendicular magnetization pointing up or
down relative to the vortex core. These binary states could be useful for non-volatile data storage devices suchas RAM memories, but the switching between them must be fast and energy-efficient. However, despite manyefforts switching is still slow and requires very large currents. Pac-man disks, whose shape resembles the retro
arcade game, seem to be a promising approach and Yoshinobu Nakatani and co-workers from the University
of Electro-Communications now show a more efficient way of controlling switching in these devices.
To better understand the mechanisms and the best switching conditions in the Pac-man disks, Nakatani's teamused micro-magnetic simulations to investigate vortex core switching driven by an in-plane nanosecond
current pulse. The simulations uncovered several interesting features. They found that the notch - Pac-man's
mouth - plays the double role of annihilating and nucleating the vortex core. The kinetic field induced by thecore motion gives the direction of nucleation.
These results suggest that "by utilizing both the core switching at the notch edge and the direction of the coremotion, the core polarity can be uniquely controlled by adjusting the direction of the current pulse". In thisway the current density could be reduced by 75% compared with that of a circular disk of the same diameterand thickness. The insights provided by Nakatani's team could lead to an improved design of vortex core
memory cells.
Sato, T., Yamada, K., and Nakatani, Y. Control of magnetic vortex core switching in a Pac-man disk using
a single current pulse. Applied Physics Express 7, 073003 (2014) doi: 10.7567/APEX.7.073003

Prof. Nakatani team performed micro-magnetic simulations and took snapshots of the Pac-man disk (diameter = 200 nm,
thickness = 40 nm) at different times (t = 0 ~ 2.0 ns) .The rainbow images indicating the direction of the in-planemagnetization component, whereas the grayscale images show the out-of-plane magnetization (white,up; black,down).
The vortex core switches from upward to downward.

The University of Electro-Communications 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585© 2014 The University of Electro-Communications.

Underwater robotics: Analyzing the propulsion of a soft robotic fish
In the world of underwater robotics, fish-like structures are able to accelerate and maneuver better than mostother artificial underwater vehicles. For these reasons, fish-like robots are well suited for submarine
exploration tasks. However, a complete understanding of mechanisms governing the swimming movements offish-like robots remains elusive, limiting the performance of such underwater robot.
Notably, propulsion by undulation entails complicated interplay between body deformation and fluid motion.
Developing high performance robots by utilizing such complex dynamics is the main goal of the research on
robotic fish led by Aiguo Ming and colleagues at the University of Electro-Communications, Tokyo.
Recently, Ming and his colleagues including Wenjing Zhao demonstrated how fluid-structure interaction
analysis can be applied to capture the propulsion of a soft robotic fish. The coupled equations describing theinteraction between the fluid pressure on the robot and the load generated by the fish motion were solved
numerically through a mesh method followed by a algorithm. The simulated dynamics was compared to theexperimentally measured behavior of a robotic fish propelled by a piezoelectric fiber composite.
In the oscillation motion of the robotic fish, an increase in oscillation frequency led to a decrease in thedisplacement of tail fin, and the propulsive force has no direct proportional relationship with the robot
oscillation frequency. Trends in the variation of the displacement and propulsive force of the robotic fish atdifferent frequencies were determined by fluid-structure interaction analysis and confirmed experimentallyusing an actual prototype robot. The effectiveness of the fluid-structure interaction analysis was verified andwas useful for evaluating the robotic fish's propulsion characteristics for improving robot design and control.
The successful analysis paves the way for future applications of fluid-structure interaction analysis to improve theperformance of underwater robots.
Zhao, W., Ming, A., Shimojo, M., Inoue, Y. & Maekawa, H. Fluid-structure interaction analysis of a soft robotic
fish using piezoelectric fiber composite. Journal of Robotics and Mechatronics 26(5), 638-648 (2014)

Comparison between simulated and experimental displacement of the fin of a robotic fish. A successful simulation of the dynamicalinteraction between a soft robotic fish and its surroundings was demonstrated by researchers of the University ofElectro-Communications, Tokyo. A better understanding of fish propulsion could improve the performances of fishlike robots,
useful for underwater tasks.
The University of Electro-Communications 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585© 2014 The University of Electro-Communications.

Artificial intelligence: Brain-training for baseball robot
The human brain continually monitors and influences all bodily movements, helping the body adapt todifferent circumstances in order to maintain fine motor control. The part of the brain responsible for fine
motor control, including precision co-ordination and accurate timing, is called the cerebellum. In the field of
robotics, developing an artificial cerebellum capable of 'teaching' a robot to move with accurate timing is a
key goal.
Now, Tadashi Yamazaki at the University of Electro-Communications in Tokyo with Jun Igarashi at Okinawa
Institute of Science and Technology have created a model of the cerebellum comprising over 100,000'neurons'--which was implemented on dedicated hardware for parallel computing known as a graphics
processing unit (GPU)--is able to train a robot to accurately hit a ball bowled in real-time.
The 'real-time cerebellum' built by the team is a large-scale version of a so-called 'spiking network model' - amathematical description of neurons which can learn accurate timing through practice, just as the humancerebellum can. By connecting the cerebellum implemented on a GPU with a small humanoid robot, the team
were able to test whether or not their cerebellum could help the robot learn accurate timing.
The researchers' aim was to train the robot to hit a ball bowled in real-time by a bowling machine. They foundthat, over time, the robot learnt through repeated practice when to raise the bat in order to hit the flying ballaccurately. The real-time cerebellum could provide a powerful learning and training tool for robots in various
applications in future.
Reference
1.

Yamazaki, T. & Igarashi, J. Realtime cerebellum: A large-scale spiking network model of the cerebellum thatruns in realtime using a graphics processing unit. Neural Networks 47 (2013)

Yamazaki, T. & Igarashi, J. Realtime cerebellum: A large-scale spiking network model of the cerebellum that runs in realtime
using a graphics processing unit. Neural Networks 47 (2013)

The University of Electro-Communications 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585© 2014 The University of Electro-Communications.

Eyes on the sky: Monitoring effects of solar activity on aurora and global
positioning systems
Assistant Professor,
Department of Communication Engineering and Informatics, University of ElectroCommunications, Tokyo, and Center for Space Science and Radio Engineering, University ofElectro-Communications, Tokyo.
Keisuke Hosokawa is a geophysicist conducting research on the dynamics of the ionosphere.
"I am interested in a wide range of topics in space physics," explains Hosokawa. "Recently, I

Keisuke
Hosokawa

have been monitoring the effects of fluctuations in the ionosphere on global positioning systems (GPS). Solarwinds affect GPS systems, and could potentially cause chaos with aviation navigation systems. So it's animportant area of research in space physics."
Hosakawa has developed 2D imaging methodology--using all sky CCD cameras (ASC) to map fluctuations of
the ionosphere. "This approach yields much more information than traditional single-point radar observation
methods," emphasizes Hosokawa. The core of the ASC system are CCD cameras that are cooled toapproximately minus 70 degrees Celsius to reduce thermal noise. A filter between the fish eye lens and CCD
chip is used to capture red light only--approximately 630 nanometeres due to ionized oxygen in theionosphere.
Recent highlights include simultaneous observations of ionospheric scintillation during an auroral substorm on
the night of 19 November 2009 in Tromsø, Norway. The substorm led to "a transient enhancement of thephase scintillation at the time of the onset of the substorm expansion phase". Also, experiment on 12
November 2013 using cameras located in Longyearbyen, Norway and Resolute Bay, Canada showed "regionsof increased 630.0 nm airglow emissions.....which indicates that these are optical manifestations of polar cap
patches propagating across the polar cap".
Experiments in the future include increasing the area covered by the sky cameras by using a larger number ofless expensive CCD cameras.
Publications
1. K. Hosokawa et al., Observations of GPS scintillation during an isolated auroral substorm, Progress inEarth and Planetary Science 1: 16, (2014).
doi:10.1186/2197-4284-1-16
2. K. Hosokawa, K et al., Global imaging of polar cap patches with dual airglow imagers, Geophysics
Research Letters, 41, 1-6, (2014).
doi:10.1002/2013GL058748.
Further information
Website: http://gwave.ice.uec.ac.jp/~hosokawa
The University of Electro-Communications 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585© 2014 The University of Electro-Communications.

(Left) A snapshot of 630.0 nm airglow obtained by two all-sky airglow imagers in the northern polar region. The optical data
have been mapped onto the geographic coordinate system as viewed from northern space. A stream of high-density ionizedatmosphere at 300 km altitude is visualized.
(Right) An all-sky auroral image taken at Tromsø, Norway, during an auroral substorm. Superimposed circles indicate thegeometries of the GPS satellite, their size representing the level of fluctuations in the phase of the GPS signal received on the
ground.

The University of Electro-Communications 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585© 2014 The University of Electro-Communications.

The FoodCam: Smart phone application for real time food recognition for
personalized healthcare
Keiji Yanai, Associate Professor, Graduate School of Information Engineering,
University of Electro-Communications, Tokyo.
The ubiquitous smart phone is becoming more than just a device for communicating andinternet browsing. Increasingly, innovators are developing 'apps' for health and medicalcare such as monitoring blood pressure.
Here, in a significant extension of the applications of smart phones for health care, Keiji

Keiji Yanai

Yanai, an associate professor at the Graduate School of Information Engineering of the
University of Electro-Communications, Tokyo, has developed the "FoodCam"--a real time, a unique mobile
food recognition system.
"By taking a smart phone photograph of food such as a bowl of noodles, the FoodCam enables the user toestimate the number of calories and nutritional value of 256 different types of food," says Yanai. "An internet
connection is not necessary. The computation to recognize and analyze the food is carried out by the mobile
device itself."
Recognition accuracy is important as stated in a recent publication by
Yanai: "Experiments show a 79.2 % classification rate for food fromthe top 5 category candidates for a 100-category food dataset with theground-truth bounding boxes when we used HOG and color patcheswith the Fisher Vector coding as image features".
Plans for future studies include automatic recognition to initiate

A screen-shot of the 'FoodCam' and smartphone.

detection procedures without any user operation, measuring thevolume of food, use of 'deep learning' to minimize the memory usage of smart phones, and improvement of
the accuracy by using more than a single image.
Publication
1. Yoshiyuki Kawano and Keiji Yanai, Multimedia Tools and Applications, April 2014
DOI 10.1007/s11042-014-2000-8
Further information
1. Yanai Lab. website: http://mm.cs.uec.ac.jp/e/
2. FoodCam project page: An Android application of the mobile food recognition system and 100/256-classfood dataset "UEC-FOOD100/256" can be downloaded from http://foodcam.mobi/

The University of Electro-Communications 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585© 2014 The University of Electro-Communications.

Intelligent robotics: The ultimate automatic door system
Assistant Professor, Department of Human Media Systems at Graduate School ofInformation Systems, University of Electro-Communications, Tokyo.
Tetsuo Tomizawa is an assistant professor at the Department of Human Media Systems at
Graduate School of Information Systems, University of Electro-Communications (UEC). "I
spent my graduate school days developing 'town-robotic systems' that fit seamlessly into
the real word to support humans in their daily lives," says Tomizawa. "Examples include aremote book browsing system to enable people to control a robot in a library to select a

TetsuoTomizawa

book and then transmit images of the contents via a camera. The robot turns the pages as instructed. A virtual
version of a genuine library in the comfort of your own home."
Recently, Tomizawa has directed his attention to the development of intelligent automatic door systems. "I amreapplying laser scanning technology from my research on town robots," says Tomizawa. The major goals are
to develop automatic doors that open only for people who intend to use them and adjust the precise timing of
the doors to open to match the speed of people moving towards the doors. Rather like the rapid and precise
movement of sliding doors in the Star Trek movies.
The automatic door system consists of an innovative three-dimensional laser range sensor that makes
Lissajous figure scans in real time near the doors (measurement range at a height of 3.5 m is 5.0 m by 3.0 m;
observation of 5440 points/frame at frame rate of 10 Hz) and algorithms to control the opening times of thedoors. Examples of the 'intelligence' of the system include robustness to changes in the sunlight and rain, andvisual recognition of people who are just passing by with no intension of using the doors.
Another innovation is using the 3D laser scanner to count people using the automatic doors. "The challenge in
people counting is to identify individuals who are walking in close proximity to each other," says Tomizawa.
Notably, the UEC automatic door system has achieved 99% accuracy in counting 500 people over a period of
90 minutes. "We are working with industrial partners to commercialise these ideas," says Tomizawa. "Weenvisage many other applications of our Star Trek door system."
Publications
1. Daiki Nishida et al, Development of Intelligent Automatic Door System, 2014 IEEE International
Conference on Robotics & Automation (ICRA 2014), pp 6368-6374, May 31 - June 7, 2014. Hong Kong.
Further information
1. Tetsuo Tomizawa website: http://www.tomy3.com/Research/

The University of Electro-Communications 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585© 2014 The University of Electro-Communications.

Automatic door system concept and 3D sensor

Intelligent automatic door

Counting people

The University of Electro-Communications 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585© 2014 The University of Electro-Communications.

Letter From Alumni
Alumni in Thailand
Pokpong Songmuang Lecturer at Department of Computer Science, Faculty of Science and Technology,
Thammasat University (TU), Pathumthani, Thailand
I studied for my doctorate at the Graduate School of Information Systems under
the supervision of Professor Maomi Ueno and received the degree in 2010. My
research at UEC was supported by a Japanese government scholarship.
I studied information systems and the design and development of e-Testing
systems. I designed and developed several systems for supporting automated test
construction, collaborative test construction, response data analysis, and so on inorder to improve the quality of large-scale high stake tests. I proposed system

At Carnegie-Mellon
University, USA,
when I attended AAAI EDM
2010.

generating test form that consist of different item sets but have equivalent quality(average score, standard error, test information and so on). Two papers from this research were accepted by
the leading journal, IEEE Transactions on Learning Technology, Computer Science Society and another two
papers were accepted by IEICE Transaction on Information Systems.
I also presented the results of my research at many conferences in Japan and abroad such as the highly
acclaimed conferences AAAI, EDM 2010, USA (photograph). Since I came from a small country and had noexperience of travelling abroad, I learnt a lot from attending conferences to present my research and mademany new friends. All of my travels to present my research were supported by UEC and my supervisor's
research grants. I really appreciate all the support and I hope that all students at UEC will have similar
opportunities. At that time, several organizations were interested in the e-Testing systems including theInformation-technology Promotion Agency (IPA at Ministry of economy, trade, and industry in Japan) andthey planed to transfer tests from paper-based to computer-based formats. Therefore, when I was a third year
student in the doctoral course, the Ueno laboratory was asked by IPA to develop a prototype of the e-Testing
system. I had a hard time with this project while continuing my dissertation but it was a valuable experience
for me. In the following year, IPA opened a large test center and the e-Testing system of IPA (Jouhoushorigijyutsusha shiken in Japanese) was established based on our prototype system. This made me proud of myresearch since my supervisor and UEC not only taught me to do research but also to contribute to thebetterment of society. Moreover, this project opened me up to a new world to work in Japan as a researcher.
After I graduated, I worked at a research institute for educational measurement for one year. I had a good timeat the institute and learned a lot about Japanese industry and business culture. Before I went back to my homecountry, I had an opportunity to work at Waseda University as an assistant professor for several years. All thewonderful opportunities of my working life are a result of my research at UEC and excellent advice from my
The University of Electro-Communications 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585© 2014 The University of Electro-Communications.

supervisor. I really appreciate my supervisor's support and UEC's efforts in providing a wonderfulenvironment for a foreign student like me.
Recently, I became a lecture at Thammasat University (TU) and want to form a closer relationship between
TU and UEC by visiting UEC every year with my colleagues and continuing the process of proposing a
Memorandum of Understanding (MOU) between TU and UEC. I hope in near the future, UEC and TU willconduct collaborative activities such as workshop, exchange student program, research, and so on.

The University of Electro-Communications 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585© 2014 The University of Electro-Communications.

The University of Electro-Communications (UEC) in Tokyo
is a small, luminous university at the forefront of applied sciences, engineering, and technology
research. Its roots go back to the Technical Institute for Wireless Commutations, which wasestablished in 1918 by the Wireless Association to train so-called wireless engineers in maritime
communications in response to the Titanic disaster in 1912. In 1949, the UEC was established as anational university by the Japanese Ministry of Education, and moved in 1957 from Meguro to its
current Chofu campus Tokyo.
With approximately 4,000 students and 350 faculty, UEC is regarded as a small university, but withparticular expertise in wireless communications, laser science, robotics, informatics, and materialscience, to name just a few areas of research.
The UEC was selected for the Ministry of Education, Culture, Sports, Science and Technology (MEXT)
Program for Promoting the Enhancement of Research Universities as a result of its strengths in threemain areas: optics and photonics research, where we are number one for the number of joint
publications with foreign researchers; wireless communications, which reflects our roots; andmaterials-based research, particularly on fuel cells.
International Public Relations
The University of Electro-Communications
1-5-1 Chofugaoka, Chofu, Tokyo 182-8585
E-mail : kokusai-k@office.uec.ac.jp
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