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Department of Electrical and Electronic Engineering*nonmember
Improvement of Robust Performance by Taking into Account Model Uncertainty Identification on GIMC Structure,
K.Yubai: Proceedings of the 2005 International Power Electronics Conference, pp.1981-1984, 2005
GIMC proposed by Zhou consists of a conditional feedback structure and an outer-loop controller. A
conditional feedback structure included in GIMC makes it easy to robustfy a control system or construct a fault-tolerant
control system, while an outer-loop controller specifies a nominal control performance. In this paper, the design methodof Youla parameter on GIMC taking into account model uncertainty is proposed and the effectiveness of the proposed
design method is verified by some simulations.
Fault-tolerant Tip Position Control of Flexible Arm for Sensor Fault by Using Adaptive Sensor Signal Observer, Yu
Izumikawa, K.Yubai and J.Hirai: Proceedings of SICE Annual Conference 2005 in Okayama, pp.2615-2620, 2005
In recent years, control system reliability has received much attention with increase of situations where
computer controlled systems such as robot control systems are used. In order to improve reliability, control systems
need to have abilities to detect a fault (fault detection) and to maintain the stability and the control performance (fault
tolerance). In this paper, we address the vibration suppression control of a one-link flexible arm robot. Vibration
suppression is realized by an additional feedback of a strain gauge sensor attached to the arm besides motor position.
However, a sensor fault (e.g., disconnection) may degrade the control performance and make the control system
unstable at its worst. In this paper, we propose a fault-tolerant control system for strain gauge sensor fault. The proposed
control system estimates a strain gauge sensor signal based on the reaction force observer and detects the fault bymonitoring the estimation error. After fault detection, the proposed control system exchanges the faulty sensor signal forthe estimated one and switches to a fault-mode controller so as to maintain the stability and the control performance.
We apply the proposed control system to the vibration suppression control system of a one-link flexible arm robot andconfirm the effectiveness of the proposed control system by some experiments.
Yu Izumikawa, K.Yubai and J.Hirai: Fault-Tolerant Control System of Flexible Arm for Sensor Fault by Using
Reaction Force Observer, IEEE/ASME Transactions on Mechatronics, Vol. 10, No.4, pp.391-396
In this paper, we propose a fault-tolerant control system for a tip position control of a flexible arm robot. The
proposed control system has a strain gauge sensor signal observer based on a reaction force observer and detects a fault
by monitoring an estimation error. In order to improve estimation accuracy, plant parameters included in the sensor
signal observer are adjusted by using the strain gauge sensor signal in normal time through adaptive laws. After fault
detection, the proposed control system exchanges the faulty sensor signal for the estimated one and switches to a fault
mode controller so as to maintain the stability and the control performance. We confirm the effectiveness of the
proposed control system by some experiments.
Realization of Fault-tolerant Vibration Suppression Control System of Flexible Arm by GIMC Structure, T.Sakuishi,
Y.Izumikawa, K.Yubai and J.Hirai: Proceedings of SICE Annual Conference 2005 in Okayama, pp.1351-1354, 2005
In recent years, control system reliability has received much attention with increase of situations where
computer-controlled systems such as robot control systems are used. In order to improve reliability, control systems
need to have abilities to detect a fault (fault detection) and maintain the stability and the control performance (fault
tolerance). In this paper, we address the strain gauge sensor fault of a flexible arm robot. In order to achieve a
fault-tolerant control system, the effect of the fault is identified as dual Youla parameter by regarding the estimation
error of the faulty sensor signal as the faulty plant output. Moreover, Youla parameter is designed so as to suppress theeffect of dual Youla parameter. Youla parameter is implemented in GIMC structure proposed by Zhou. Since GIMC
structure includes a conditional feedback, it is suitable for achieving a fault-tolerant control system. The effectiveness ofthe proposed fault-tolerant control system is confirmed by some experiments.

A－24

A Joint Design Method for Achieving Nominal Performance Based on GIMC Structure, N.Wakayama, K.Yubai and
J.Hirai: Proceedings of SICE Annual Conference 2005 in Okayama, pp.2621-2624, 2005
Joint design methods are based on an iterative scheme of model identification and controller design
associated with each other. This paper proposes a new joint design method based on GIMC structure. The proposed
joint design method evaluates the performance degradation from the nominal performance explicitly so as to achieve
the nominal performance for the actual plant. The identification of dual Youla-parameter R and the design ofYoula-parameter Q are related to each other under the same control objective. Youla parameter Q is implemented in
GIMC structure proposed by Zhou. The effectiveness of the proposed design method is verified by an actual control
system.
Joint Design Method Based on Internal Structure of 2DOF Control System, K.Yubai: Transaction of IEE Japan,
Vol.125-D, No.6, pp.533-540, 2005
In many cases, control system design is formulated as minimization of some prescribed closed loop
performance reflecting a control requirement. Since the closed loop performance is a function of a controlled plant anda controller, the model identification and controller design must interact with each other. This motivates us to consider
the model identification and controller design simultaneously. However, most of the previous joint design methods are
not applicable to unstable plants because the identified plant model is usually used as the design parameter, i.e. aweighting function in the controller design. On the other hand, we have analyzed the internal structure of 2DOF control
system using coprime factorization on RH∞ and shown that two free parameters, K and Q belonging to RH∞, specify
tracking performance and feedback performance, respectively. Also, Tay et.al have proposed a parameterization of theplant dynamics by switching the role of the controlled plant and controller, and introduced a free parameter R belonging
to RH∞. In this paper, we propose a new joint design strategy based on the identification of R and the design of Q.
Since the identified plant parameter R is always stable, the proposed joint design strategy can be applied to wider classthan the conventional joint design methods. Moreover, it is known that R is well approximated as a less order model
than the plant itself. This leads to the advantage in designing Q with less order. Finally, the usefulness of the proposed
method is verified by some simulations and experiments.
New Initial Pole Position Estimation of Surface PM-LSM Using Reference Currents, Tae-Woong Kim*, Junichi
Watanabe*, Sumitoshi Sonoda*, and Junji Hirai : IEEE Trans. on Industry Applications, Vol.41, No. 3, pp.817-824,
2005
This paper proposes a new algorithm for the initial pole-position estimation of a surface permanent-magnet
linear synchronous motor (PM-LSM), which is carried out under closed-loop control without a pole sensor and isinsensitive to the motor parameters. This is based on the principle that the initial pole position (IPP) is calculated by thereverse trigonometric function using the two reference currents, which are received from the speed controller.
Compared to published research, the proposed algorithm does not utilize the impedance ratio like the general methods
and it can be widely applied without the limitation of the motor structures. The effectiveness of the proposed algorithm
is verified by testing a surface PM-LSM with large cogging. Its results show the IPP is well estimated within a satisfied
moving distance and a shorter estimation time, even if a large disturbance such as cogging exists.
Suboptimum condition of Fingertip arrangement decision", K. Mori, S. Komada, J. Hirai : Proc. of the 2005
International Power Electronics Conference, pp.1374-1377, 2005
Multi-finger hands are necessary for robots in order to realize many tasks. This paper proposes a graspingarrangement decision algorithm, which realizes a small tip force of multi-finger hand with feasible time. A norm of tip
force for translational and rotational force for grasping objects on xy plane is derived. By the analysis of the equation,
condition that realize a small norm is found. By utilizing the condition, semi-optimum fingertip force is found with afeasible time.

A－25

Chattering Free Neuro-Sliding Mode Control of DC Drives, M. G. Sarwer*, Md. A. Rafiq*, M. Datta*, B.C. Ghosh*,and S. Komada : Proc. of 2005 International Conference on Power Electronics and Drive Systems, vol.2, pp.1101-1106,
2005
In this paper, a synergistic combination of neural network (NN) with sliding mode control (SMC)
methodology is proposed. The main purpose is to eliminate the chattering phenomenon in sliding mode control. The
reduction of the chattering is achieved by using a distance function that measures the distance between the trajectory ofstate errors and the sliding surface as the corrective control term instead of discontinuous sign function. The NN isutilized to estimate the equivalent control of SMC. The network weights are adjusted using a modified online error
back propagation algorithm. The proposed scheme is applied to control the speed of a DC drive. Simulation verifies
that the proposed control scheme has the advantage of less chattering in SMC.
Development of a Biofeedback-Based Robotic Manipulator for Supporting Human Lower Limb Rehabilitation, N.
Okuyama, S. Komada, and J. Hirai : Proc. of 36th International Symposium on Robotics, pp.1-4, 2005
We have developed a manipulator for supporting human lower limb rehabilitation that enables isokinetic
muscular contraction to both knee and hip joints simultaneously. This time, we estimate muscular tensions in thigh andpelvis area of a healthy person during exercise by the manipulator to realize a biofeedback treatment without using
electromyogram (EMG). The muscular tension estimate is made by employing muscular fatigue minimization methods.
As a result of experiments and analysis, fairly good coincidence in the wave form is confirmed between the muscle
action potential and the estimated muscular tensions.
Derivation of minimization condition of manipulating force for multi fingered robot hands and its application todecision of fingertip position, F.Nakamura, S.Komada, and J.Hirai : Proc. of 36th Int. Symposium on Robotics, pp.1-4,
2005
Many researches on decision of fingertip position of multi fingered robot hands have been performed inorder to minimize fingertip force for a given task. Some of these methods, however, take much time until decision of
fingertip position because nonlinear programming problem including friction condition is solved for all combinationsof candidates of fingertip positions. This paper newly derives a minimization condition for fingertip force ofmanipulating force. By using the condition, unnecessary candidates are deleted in advance to realize fast decision of
fingertip position. Lastly, numerical verification for the proposed method is performed.
Identification of Switched Systems with unknown Switch Points and Its Application, Shangchang MA, Tadanao
ZANMA, Muneaki ISHIDA: Proceedings of 2005 IEEE International Conference on Systems, Man and Cybernetics,
vol..3, p.p.2885-2890
System identification covers a very wide range of techniques for obtaining a system model from its
input-output data. In this paper, we address the identification problem of switched systems, by focusing our attention on
hinging hyperplane autoregressive exogenous models (HHARX), which can be identified efficiently via mixed-integer
programming. As an example, the problem of extracting operation modes in a driving system of a small toy vehicle andtheir switch conditions is formulated. The formulation of the identification problem of switched systems with unknown
switch points is based on the hybrid dynamical system theory. The effectiveness of HHARX model approach inswitched system identification is verified by simulation.
Continuous position control by symbolic input and output, Yosuke TAKEI, Tadanao ZANMA, Muneaki ISHIDA:
Proceedings of 2005 IEEE International Conference on Industrial Technology, p.p.805-810
This paper concerns a control problem for a specification which requires a finer description than the
resolution of available sensors and actuators. Such a situation may arise when a given control specification is to beA－26

achieved as accurate as possible while sensors are kind of limit switches and actuators are on/off control architecture. In
this paper, a ball position control system is taken. The experimental setup is modeled with rolling friction. For theexperimental setup, we propose a control algorithm based on discrete input and output and continuous state estimation.
Finally, the proposed method is applied to the experimental setup to demonstrate its effectiveness as well as numericalsimulation.
Designing of A Small Wind Power Generating System, Takashi NONOYAMA, Naoki YAMAMURA, Muneaki
ISHIDA, Hideki FUJITA*: Proceedings of 2005 International Power Electronics Conference (IPEC 2005), S36-2,
p.p.1274-1279
At present most of existing wind power systems are of large capacity (over 1MW output) and high initialcost. These systems require wide area to build. Therefore, aiming to popularize the wind turbine generation system inresidential area, we proposed small capacity (about 100W-a few kW output) generation system. Moreover, we
proposed simple maximum power racking control system with analog circuit and achieved over 90% output of
maximum power in any circumstance. But improper design of the control parameters makes the system performance
worse. Then we proposed an equivalent circuit of the wind power generation system and a design method of its control
system. Usefulness of the proposed control system along with proposed design method is confirmed by experimental
results of the wind power generation system. In this system, we use DC motor as the wind turbine because the output
characteristic of the DC motor is similar to that of the wind turbine.
A Control Method of Prolonging the Service Life of Battery in Stand-alone Renewable Energy System using Electric
Double Layer Capacitor (EDLC), Jia YAN, Ryousuke SHIBATA, Naoki YAMAMURA, Muneaki ISHIDA: 2005
International Conference on Power Electronics and Drive Systems (PEDS 2005), 1E-1, p.p.228-233
A control method for prolonging the service life of battery bank in stand-alone renewable energy systemusing Electric Double Layer Capacitor (EDLC) is presented. Recently, it has become one of the main problem needed
to be solved urgently in future stand-alone renewable energy system that the service life of battery bank is shortened
due to the fluctuant output power caused by varied weather condition, with higher cost and power loss. In this paper, toprolong the service life of battery bank by realizing smoothed power supply to battery bank, a bi-directional
Buck/Boost topology and its control method using Electric Double Layer Capacitor (EDLC) is proposed, Simulation in
PSIM and experiment are carried out in order to confirm the validity of the proposed method. And the simulation
parameters range is identified according to the smooth level of battery current output. The experiment result is better
agreed with the anticipated design and simulation results when the higher harmonic frequency varies under theappointed range of frequency and fluctuation amplitude
Direct visualization of electromagnetic microfields by superposition of two kinds of electron holograms, Akinori
OHSHITA, Masaaki OKUHARA, Chiharu MATSUYA, Koichi HATA and Kazuo IIDA: European Microbeam
Analysis Society 9th EUROPEAN WORKSHOP/International Union of Microbeam Analysis Societies 3rd
MEETING, p.319, 2005
A new electron holographic method to visualize pure phase objects such as electromagnetic microfields, which isachieved by superposition of two kinds of electron holograms, is presented. The method is very simple and is twice assensitive as the conventional double-exposure electron holography and the four-electron-wave interference. Using thistechnique, an electric field around a charged latex sphere and a magnetic field around a barium ferrite particle havebeen directly observed.
Electron Interference Fringes Observed in Projected Image of Earthed Multiwall Carbon Nanotube, Akinori OHSHITA,
Shunsaku WAKI, Chiharu MATSUYA, Koichi HATA and Kazuo IIDA, Boklae CHO*, Tuyoshi ISHIKAWA* andChuhei OSHIMA*: Atomic Level Characterizations, 08P15, 2005
The electron interference fringes observed in the projected image of earthed multiwalled carbon nanotube areA－27

compared with those produced by conventional electron biprism in electron microscopy. It is found that the former
interference fringes resemble the latter ones in shape.
Effect of Low Molecular Weight Fluid on the Surface Free Energy of an Alloy of EPDM/SIR, Kazuo IIDA and
Reuben HACKAM*: International Symposium on Electrical Insulating Materials, pp.352-355, 2005
Ethylene propylene diene rubber (EPDM), silicone rubber (SIR) and their alloys have good performance
when used as outdoor insulators. The hydrophobicity of the surface is maintained in wet conditions as a result ofdiffusion of low molecular weight (LMW) fluid from the bulk to the surface. The amount of LMW fluid on the surface
and in the bulk of the material determines the hydrophobicity during the lifetime of the alloy of EPDM/SIR used as
insulators. The surface free energy of the alloy of EPDM/SIR is determined using the harmonic-mean method bymeasuring the static contact angles of water and methylene iodine. The surface free energy of the cleaned surface of thealloy is estimated to be about 30 mJ/m2. The removal of LMW fluid from the surface and migration of the LMW fluid
to the surface have influence on the static contact angles of water and methylene iodine, but have a small effect on thesurface free energy. It comes from the change in the ratio of two components of the surface free energy due to non-polar
dispersive force and polar non-dispersive force.
Handwritten Keywords Recognition on Whiteboard Using Dictionary for e-Learning , Daisuke YOSHIDA, Shinji
TSURUOKA, Hiroharu KAWANAKA* and Tsuyoshi SHINOGI , Proceedings of the sixth International Symposiumon advanced Intelligent Systems (ISIS2005), pp. 197-202, 2005
We have proposed an individual e-Learning system using two cameras and a pen capture tool on whiteboard.
One of important problems in our learning system is that the accuracy of handwritten character recognition on
whiteboard is not enough for keyword retrieval in textbook. This problem caused the low matching rate between the
handwritten character strings on whiteboard and the keywords in the textbook, and the system can’t link the string to
the explanation in textbook. In this paper, we propose the new matching method of high accurate recognition for key
word using word dictionary. We examined for handwritten character strings including 50 key words, and we obtained
the key word recognition rate of 90 % (the method without word dictionary: 54 %). We confirmed the usefulness using
word dictionary for handwritten strings on whiteboard.
Automatic Determination of an Active Camera View in an Image Based e-Learning System, Kenichi SHIRASAWA,
Hiroharu KAWANAKA*, Shinji TSURUOKA, Tomohiro YOSHIKAWA* and Tsuyoshi SHINOGI, Proceedings ofthe sixth International Symposium on advanced Intelligent Systems (ISIS2005), pp. 213-217, 2005
We are interested in the education system based on the image, and we are constructing the individual learning
system based on the real lecture on campus. One of important problem in an image based e-Learning system is thecontrol of camera view for remote students to watch eagerly. The interesting camera view attracts the remote students toa lecture, and it determines the value of e-Learning. In this paper, we propose a new view control algorithm on an active
network camera with high speed. We evaluate a new statistical analysis of the silhouette histogram for the lecturer
behavior recognition, and a new image segmentation method for the objects on blackboard. We design a new statetransition diagram for the automatic determination of the active camera view. We examined the system for some actual
lectures in an actual classroom (capacity: 100 students).
Hybrid Automatic Tracking of Regional Myocardium from Ultrasonic RF Echo Signal, Akihiko KAWABATA, Shinji
TSURUOKA, Hiroharu KAWANAKA*, Tsuyoshi SHINOGI, Wataru OHYAMA, Tetsushi WAKABAYASHI andKiyotsugu SEKIOKA*, Proceedings of the twelfth International Conference on Biomedical Engineering(ICBME2005), 1B4-02 on CD-ROM, pp.1-4, 2005
In this paper we propose a new hybrid automatic tracking method (HATM) to improve tracking accuracy of
FATM. In HATM, a heart cycle time is estimated using the correlation coefficient between the RF signal on an initialtime (t0) and the RF signal at each time, and the time with maximum value of the correlation coefficient is estimated as

A－28

the heart cycle time. The automatic tracking from a time to the initial time is called the backward automatic tracking
method (BATM), and HATM uses FATM and BATM. We apply it eight actual RF signals to discuss the efficiency ofthe estimation method of heart cycle time. The experimental results show that the estimation error is less than 2% fromthe cycle time based on ECG. This paper also shows that the comparison of FATM and HATM using 50 actual RF
signals, for regional myocardium. As the result, the correct rate of FATM was 40% and that of HATM was improved to62%. Calculation time to acquire a result is about 2 minutes in the case of HATM, which means it takes twice timecomparing with FATM. We confirmed the usefulness of HATM for some actual RF signals.
Estimation of Respiratory Rate Using Long Term ECG Recording, Toshiyuki USAMI, Wataru OHYAMA, Tetsushi
WAKABAYASHI, Fumitaka KIMURA, Shinji TSURUOKA and Kiyotsugu SEKIOKA*, Proceedings of the twelfth
International Conference on Biomedical Engineering (ICBME2005), 2B1-09 on CD-ROM, pp.1-4, 2005
In this paper, we propose a new method for extracting respiratory signals from long-term echocardiogram(ECG) recording. The proposed method employs some filtering techniques on frequency domain followed by theestimation of instantaneous frequency by Hilbert transform to estimate respiratory frequency. The evaluation
examination, which compares the respiratory frequency estimated from ECG and the one derived from the respiratory
signal measured with oronasal thermistor, shows that the proposed method has potentiality for detection and diagnosisof respiratory disorders. From this result, we conclude that temporal frequency estimation of respiration gives moredetailed information on respiratory state than power spectrum of R-R interval.
Myocardial Motion Tracking by Adaptive Combination of Correlation and Phase Difference of US RF Signals, Koichi
NAGATA, Wataru OHYAMA, Tetsushi WAKABAYASHI, Fumitaka KIMURA, Shinji TSURUOKA and Kiyotsugu
SEKIOKA*, Proceedings of the twelfth International Conference on Biomedical Engineering (ICBME2005), 3B2-08
on CD-ROM, pp.1-4, 2005
We propose a novel method for noninvasive extraction of two dimensional regional motion of left ventricularmyocardium by means of the adaptive combination of correlation and instantaneous phase difference of ultrasonic RF
signals. The proposed method is motivated by the successfully achievement on the myocardial motion tracking bymeans of both ultrasonic Doppler and RF signals. At first, the method extracts the velocity on each sampling point byinstantaneous phase differences. The next, the velocities are evaluated by the correlation. Finally, these velocities arecorrected by the amount associated with the value of accuracy and accumulated into the position of tracking points forerror reduction. Experimental results show the method is suitable for the evaluation of regional myocardial motion.
Edge Extraction of Heart from Ultrasonic Echo Image by Active Contour Models, Yosuke OKAYAMA, Shinji
TSURUOKA, Tsuyoshi SHINOGI, Hiroharu KAWANAKA*, Fumitaka KIMURA, Tetsushi WAKABAYASHI,
Wataru OHYAMA and Kiyotsugu SEKIOKA*, Proceedings of the twelfth International Conference on Biomedical
Engineering (ICBME2005), 4B2-02 on CD-ROM, pp.1-4, 2005
In this paper, we propose a new edge extraction method to detect the outer and inner contours of heart
simultaneously by active contour models. Our edge extraction method consists of three steps: (1) the manual
specification of a central point and one edge point on the outer and inner contours respectively to determinate outer andinner initial contours; (2) the automatic determination of the series of initial edge points at regular intervals on the outerand inner contours; (3) the detection method of the edge point using the smoothness of the contours using thedifferential coefficients between the position of the next edge point, the distance between the temporal frames, thedistance between the outer and inner contours, and the difference of grey level in the neighbor region about the edge.
We confirmed the method obtain the better results than the previous method for some heart walls.
Parallel Core Testing with Multiple Scan Chains by Test Vector Overlapping, Tsuyoshi Shinogi, Yuki Yamada,
Terumine Hayashi, Tomohiro Yoshikawa, Shinji Tsuruoka : 2005 IEEE VLSI-TSA International Symposium on VLSI
Design, Automation and Test (VLSI-TSA-DAT), pp.205-208,2005

A－29This paper proposes the parallel testing of cores with multiple scan chains using the test vector overlapping for
reduction of SoC testing cost. Unlike conventional scan architecture for SoC testing, by introducing multiple scan chain
cores, our method can reduce the test application time without increasing the number of I/O pins used in testing, andreduce the test data volume. A controller design and a new overlapping algorithm are also presented for the test vector
overlapping with multiple scan chain cores. Experimental results show its effectiveness.
Test Data Sequence Generation Method for Reduced Scan Shift without Scan Chain Flip-Flop Reordering, Tsuyoshi
Shinogi, Hiroyuki Yamada, Terumine Hayashi, Tomohiro Yoshikawa, Shinji Tsuruoka : IEEE 6th Workshop on RTL
and High Level Testing(WRTLT05), pp.73-78，2005
To reduce the test application time and the test data volume in full-scan testing, various methods are proposed
which utilize some additional built-in circuits dedicated for testing. In contrast, a previous method, called Reduced Scan
Shift, does not utilize any additional built-in hardware. However, it totally relies on scan chain flip-flop reordering,which is not always applicable. In this paper, we propose a test data sequence generation method for Reduced Scan
Shift without scan chain flip-flop reordering. Our method utilizes justification technique and don't-care bits in test
vectors. Experimental results show that the performance on the reduction of test application time and test data volume
by our method without scan chain flip-flop reordering is even higher than the original Reduced Scan Shift utilizing scanchain flip-flop reordering.
A Test Cost Reduction Method by Test Response and Test Vector Overlapping for Full Scan Test Architecture :Tsuyoshi Shinogi, Hiroyuki Yamada, Terumine Hayashi, Tomohiro Yoshikawa, Shinji Tsuruoka, IEEE 14th Asian Test
Symposium, pp.366-369, 2005
To reduce the test application time and the test data volume in full-scan testing, various methods are proposed
which utilize some additional built-in circuits dedicated for testing. In contrast, a previous method, called Reduced Scan
Shift, does not utilize any additional built-in hardware. However, the method relies on scan chain flip-flop reorder-ing,
which is not always applicable. In this paper, we pro-pose a test data sequence generation method for Reduced Scan
Shift without scan chain flip-flop reordering. Our method fully utilizes justification technique and don't-care bits in test
vectors.
Correction of OFDM Signal Form in Time Domain to Reduce ICI Due to the Doppler Spread and Carrier Frequency
Offset, Gagik Mkrtchyan, Mori Kazuo and Hideo Kobayashi: IEICE Transactions on Communications, Vol.E88-B,
no.1 pp.122-133, Jan.. 2005.
Proposal of OFDM Channel Estimation Method Using Discrete Cosine Transform, Hideo Kobayashi and Kazuo Mori:
IEICE Transactions on Communications，Vol.J88-B, no.1 pp.256-268, Jan. 2005.
Proposal of Clipping and Inter-Modulation Noise Mitigation Method for OFDM Signal in Non-Linear Channel, Pist
Boonsrimuang, Kazuo Mori, *Tawil Paungam and Hideo Kobayashi: IEICE Transactions on Communications,
Vol.E88-B, no.2 pp.427-435, Feb. 2005.
Proposal of Link Condition Estimation Scheme for MC-CDMA System with Adaptive Modulation Method, Satoshi
Kominami, Kazuo Mori and Hideo Kobayashi: IEICE Transactions on Communications, Vol. J88-B, no.2 pp.383-398,
Feb. 2005
Asymmetric Radio Resource Assignment Scheme for Connection-less Services in CDMA/shared-TDD Cellular
Packet Communications, Yukinari Kobayashi, Kazuo Mori and Hideo Kobayashi: IEICE Transactions on
Fundamentals of Electronics and Communications and Computer Sciences, Vol.E88-A, no.7, pp.1903-1911, July 2005.

A－30

Proposal of Pre-Equalization MC-DS-CDMA Scheme with Frequency Spread Coding, Satoshi Kominami, Katsuhiro
Naito, Kazuo Mori and Hideo Kobayashi: IEICE Transactions on Communications, Vol.J88-B, No.8, pp.1478 - 1489,
August 2005
Downlink packet transmission control in soft handoff status on CDMA wireless IP networks, Abubaker Khumsi,
Kazuo Mori and Hideo Kobayashi: ECTI-EEC Transactions on Electrical Eng., Electronics, and Communications,vol.3, No.2, pp.125-131, August 2005.
Performance Evaluations of DCT Interpolation-based Channel Estimation Method for MIMO-OFDM System,
Yuanrun Teng, Katsuhiro Naito, Kazuo Mori and Hideo Kobayashi: IEICE Transactions on Communications,
Vol.E88-B, No.9, pp. 3806-3810, Sep. 2005.
A study of wireless TCP access with base station diversity, Katsuhiro Naito, *Hiraku Okada, *Takaya Yamazato and*Masaaki Katayama: Wiley Electronics and Communications in Japan (Part I: Communications), Vol. 88, Issue 9, pp.
49 - 61, Sep. 2005.
Mitigation of Non-Linear Distortion using PTS and IDAR Method for Multi-Level QAM-OFDM System, Pisit
Boonsrimuang, Kazuo Mori, *Tawil Paungam and Hideo Kobayashi: ECTI-CIT Transactions on Computer andInformation Technology, vol.1, No.2, pp.84-90, Nov. 2005.
Mitigation of Non-Linear Distortion using PTS and IDAR Method for Multi-Level QAM-OFDM System, Pisit
Boonsrimuang, Kazuo Mori, *Tawil Paungma and Hideo Kobayashi: Proc. of Electrical Engineering/Electronics,
Computer, Telecommunications and Information Technology Conference (ECTI-CON 2005), pp.303-306, May 2005.
ML Time Domain Channel Estimation and Equalization for OFDM Without Guard Interval, Gagik Mkrtchyan,
Katsuhiro Naito, Kazuo Mori, and Hideo Kobayashi: Proc. of Electrical Engineering/Electronics, Computer,
Telecommunications and Information Technology Conference (ECTI-CON 2005), pp.473-476 , May 2005
Performances of Multi-Carrier System with Time and Frequency Domain Spreading for Wireless Communications,
Yuanrun Teng, Katsuhiro Naito, Kazuo Mori and Hideo Kobayashi: Proc. of IEEE WirelessCom 2005 Conference,
June 2005.
Complexity Reduced Maximum Likelihood Detection for SDM-OFDM System, Yuanrun Teng, Katsuhiro Naito,
Kazuo Mori and Hideo Kobayashi: Proc. of IEEE WirelessCom 2005 Conference, June 2005.
Proposal of a base station diversity technique based on TCP performance, Katsuhiro Naito, Kazuo Mori and Hideo
Kobayashi: Proc. of IEEE Wireless Internet Conference 2005, pp.104-111, July 2005.
Proposal of PAPR Reduction Method for OFDM Signal by Using Dummy Sub-carriers, Pisit Boonsrimuang, Kazuo
Mori, *Tawil Paungma and Hideo Kobayashi: Proc. of 10th IFIP International Conference on Personal WirelessCommunications (PWC'05), pp.489-496, August 2005.

A－31

Transmission Power Reduction Scheme Using Multi-Hop Connection in CDMA Cellular Systems with Non-Uniform
Traffic, Takehiro Nagasawa, Katsuhiro Naito, Kazuo Mori and Hideo Kobayashi: Proc. of IEEE VTS Asia PacificWireless Communications Symposium (APWCS), pp.50-54, August 2005.
Proposal of PAPR Reduction Method for OFDM System by Using Imroved DSI Method, Pisit Boonsrimuang,
Katsuhiro Naito, Kazuo Mori, *Tawil Paungma and Hideo Kobayashi: Proc. of IEEE VTS Asia Pacific WirelessCommunications Symposium (APWCS), pp.137-141, August 2005
Proposal of Residual Frequency Offset Compensation Method for OFDM System, Fang Wang, Masaaki Yamamoto,Katsuhiro Naito, Kazuo Mori and Hideo Kobayashi: Proc. of IEEE VTS Asia Pacific Wireless Communications
Symposium (APWCS), pp.194-198, August 2005.
Channel Estimation Method of OFDM Systems for Mobile Communications, Shingo Murazumi, Gagik Mkrtchyan,
Katsuhiro Naito, Kazuo Mori and Hideo Kobayashi: Proc. of IEEE VTS Asia Pacific Wireless Communications
Symposium (APWCS), pp.212-216, August 2005.
Adaptive Threshold Control Scheme for Time Slot Selection in Band Division MC-CDMA Cellular Systems, Tomoaki
Kato, Katsuhiro Naito, Kazuo Mori and Hideo Kobayashi: Proc. of IEEE VTS Asia Pacific Wireless Communications
Symposium (APWCS), pp.242-246, August 2005.
SIR Evaluation Method for Multi-Cellular Downlink MC-CDMA System, Kazutoshi Kinoshita, Katuhiro Naito,
Kazuo Mori, and Hideo Kobayashi: Proc. of IEEE VTS Asia Pacific Wireless Communications Symposium(APWCS), pp.247-251, August 2005.
Proposal of QAM-OFDM System with DSI and IDAR Method in Satellite Channel, Pisit Boonsrimuang, Katsuhiro
Naito, Kazuo Mori, *Tawil Paungma and Hideo Kobayashi: Proc. of Joint Conference on Satellite Communications(JC-SAT2005), pp.89-94, Oct. 2005.
Proposal of Estimation Method for Non-linear Amplifier Characteristics in Satellite Channel, Pisit Boonsrimuang,
Katsuhiro Naito, Kazuo Mori, *Tawil Paungma and Hideo Kobayashi: Proc. of Joint Conference on Satellite
Communications (JC-SAT2005), pp.83-88, Oct. 2005.
Maximum Doppler Frequency Spread Estimation Method Using Mean Square Derivative of the ML Time Domain
Estimated Channel Impulse Response for OFDM Systems, Gagik Mkrtchyan, Katsuhiro Naito, Kazuo Mori and Hideo
Kobayashi: Proc. of Joint Conference on Satellite Communications (JC-SAT2005), pp.161-166, Oct. 2005.
Diversity Acquisition from Inter-Carrier Interference in the Frequency Division Based Mobile Communication, Gagik
Mkrtchyan, Katsuhiro Naito, Kazuo Mori and Hideo Kobayashi: Proc. of International Symposium on Intelligent
Signal Processing and Communication Systems (ISPACS2005) pp.605-608, Dec. 2005.
Decision Aided Compensation of Residual Frequency Offset for MIMO-OFDM Systems with Nonlinear Channel,
Shouyi Yang, *Jiangtao Xi, Fang Wang, *Xiaomin MU and Hideo Kobayashi: Proc. of International Symposium onIntelligent Signal Processing and Communication Systems (ISPACS2005), pp.113-116, Dec. 2005.
On Test Data Compression Using Selective Don’t-Care Identification, Terumine HAYASHI, Haruna YOSHIOKA,

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Tsuyoshi SHINOGI, Hidehiko KITA, and Haruhiko TAKASE: Journal of Computer Science and Technology, Vol.20,
No.2, pp.210-215, 2005
This paper proposes an effective method for reducing test data volume under multiple scan chain designs.
The proposed method is based on reduction of distinct scan vectors using selective don’t-care identification. Selective
don’t-care identification is repeatedly executed under condition that each bit of frequent scan vectors is fixed to binary
values (0 or 1). Besides, a code extension technique is adopted for improving compression efficiency with keeping
decompressor circuits simple in the manner that the code length for infrequent scan vectors is designed as double of thatfor frequent ones. The effectiveness of the proposed method is shown through experiments for ISCAS’89 and ITC’99
benchmark circuits.
Problem-Posing with Making Step-by-Step Explanations and Peer Evaluation [In Japanese], Shinobu TABATA,
Tsutomu SHIMOMURA, Hidehiko KITA, and Terumine HAYASHI: Journal of Science Education in Japan, Vol.29,
No.1, 2005
Dynamic Construction of Fault Tolerant Multi-layer Neural Network, Haruhiko TAKASE, Ayumi NOBTO, Hidehiko
KITA, and Terumine HAYASHI: Proceedings of International Joint Conference on Neural Networks 2005
(IJCNN2005), pp.995-999, 2005
We propose a new training algorithm for enhance tolerance to physical defects (faults) of multi-layer neuralnetworks (MLNs). We aim to construct such MLNs with the minimal number of hidden units. The proposed method
has two characteristics, constructing MLNs dynamically and getting high fault tolerance easily. We proposed dynamic
constructive algorithm with weight minimization approach (DCWMA) based on a DCA and WMA. DCA (dynamic
constructive algorithm) is a basic dynamic constructive algorithm for MLNs. WMA (weight minimization algorithm) is
a training algorithm to enhance the fault tolerance of fixed structure MLNs. The effectiveness of DCWMA is shown bysome experiment.
Test Modification and Compression Technique for Reducing Total Test Volume with Dictionary Data, Terumine
HAYASHI, Naohiro HIRAIWA, Tsuyoshi SHINOGI, Haruhiko TAKASE, and Hidehiko KITA: Proceedings of 6thInternational Conference on ASIC (ASICON 2005), pp.639-644, 2005
Though a number of techniques for test data compression have been proposed until now, most of them havenot taken into consideration the volume of dictionary data that specify decompression rules. This paper presents a test
modification and compression technique for reducing total test volume including dictionary data. As for most test
compression techniques such as Huffman coding based methods, if we determine the block size large, it results in small
test volume but large dictionary volume. Therefore, it has been thought that large block sizes are ineffective for total test
data volume reduction. However, if dictionary volume can be greatly reduced, large block sizes can be more effective.
This paper describes a compression method for reducing total test volume, especially dictionary volume, by using atechnique that produces a test set for which the number of code words is small in the case of a large block size. The
effectiveness of the proposed method is shown through test data compression experiments for ISCAS’89 benchmark
circuits.
Freestanding GaN substrate by advanced facet-controlled epitaxial lateral overgrowth technique with masking side
facets, S. BOHYAMA, H. MIYAKE, K. HIRAMATSU, Y. TSUCHIDA* and T. MAEDA*: Jpn. J. Appl. Phys. 44,
pp. L24-L26, 2005
Growth of thick AlN layer by hydride vapor phase epitaxy, Y.H. LIU, T. TANABE, H. MIYAKE, K. HIRAMATSU, T.
SHIBATA*, M. TANAKA* and Y. MASA*: Jpn. J. Appl. Phys. 44, pp. L505-L507, 2005

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High quality AlGaN/AlN superlattices grown on AlN/Sapphire template by MOVPE, Y. H. LIU, A. ISHIGA,
T. ONISHI, H. MIYAKE, K. HIRAMATSU, T. SHIBATA* and M. TANAKA*: Ins. Con. Ser. 184, pp. 247-250, 2005
Reduction of dislocation density in AlGaN with high AlN molar fraction by using a rugged AlN epilayer, A. ISHIGA, T.
ONISHI, Y.H. LIU, M. HARAGUCHI*, N. KUWANO*, T. SHIBATA*, M. TANAKA*, H. MIYAKE andK. HIRAMATSU: Mat. Res. Soc. Symp. Proc. 831, pp. E3.11.1-E3.11.6., 2005
Fabrication and characterization of UV Schottky detectors by using a freestanding GaN substrate, Y. SHIBATA,
A. MOTOGAITO, H. MIYAKE, K. HIRAMATSU, Y. OHUCHI*, H. OKAGAWA*, K. TADATOMO*,
T. NOMURA*, Y. HAMAMURA* and K.. FUKUI*: Mat. Res. Soc. Symp. Proc. 831, pp. E3.12.1-E3.12.6, 2005
Control of Step and Terrace of LSMO Thin Films by IBS Deposition, Michi Ogata, Ajay K. Sarkar, Hidetaka
Nakashima, Masahito Matsui, Yasushi Kurosaki, Md. Motin Seikh, Kazuhiro Endo, Hirofumi Yamasaki, Tamio Endo :Trans. Mat. Res. Soc. Jpn. 30(3), 761-764, (2005)
Low-temperature Deposition of ZnO Thin Films on PET and Glass Substrates by DC-sputtering Technique, A. N.
Banerjee, C. K. Ghosh, K. K. Chattopadhyay, Hideki Minoura, Ajay K. Sarkar, Atsuya Akiba, Atsushi Kamiya, Tamio
Endo : Thin Solid Films 496, 112-116, (2005)
Anisotropic Vortex Dynamics Related to Screening Currents and Microwave Currents under Magnetic Fields on HighTc Superconductors, Takahisa Sakurada, Hong Zhu, Ajay K. Sarkar, Masanori Okada, Tamio Endo, Hirofumi
Yamasaki, Kazuhiro Endo, M. Shahabuddin : Proc. PIERS-05 (Hangzhou, China), 22-26, (2005)
Fabrication and Degradation of Manganites/YBCO Double Layers, Tamio Endo, Masanori Okada, Atsuya Akiba,
Hong Zhu, Hirofumi Yamasaki, Kazuhiro Endo : Proc. ICCE-12 (Tenerife, Spain), (2005)
Fabrication of LSMO Single Layers and LSMO/YBCO Double Layers, Hong Zhu, Masanori Okada, Atsushi Kamiya,
Ajay K. Sarkar, Masahito Matsui, Md. Motin Seikh, Tamio Endo : Proc. ICMAT-05 (Singapore), (2005)
Controls of a-c Orientation Growth of YBCO Thin Film Crystals for YBCO/Ferro Double Layered Tunable
Microwave Filters, Tamio Endo, Masanori Okada, Hidetaka Nakashima, Ajay K. Sarkar, Atsuya Akiba, Atsushi
Kamiya, Hong Zhu, Ken-ichi Nakanishi, Ayumu Nishio : Proc. Tri-University International Joint Seminar andSymposium, (Zhenjiang, China) (2005)
Selective growth of carbon nanotubes on silicon protrusions, Hideki Sato, Koichi Hata, Hideto Miyake, Kazumasa
Hiramatsu, Yahachi Saito*: J. Vac. Sci. & Technol. B 23（2）, pp.754-758, 2005
Selective growth of carbon nanotubes (CNTs) to required positions is a matter of importance for an
application to electron sources for field emitter arrays. Although some techniques have been proposed concerning theselective growth of carbon nanotubes, they have complex processes and difficulties in reliability and controllability. We
have developed the selective CNT growth technique, which consists of fabrication of pyramid-shaped protrusion arrayson silicon (Si) substrate by a liftoff process, selective deposition of metal catalyst film on the vertexes of the protrusions,and growth of the CNTs on the metal catalyst by chemical vapor deposition (CVD). Here we report the detailed growth
characteristics of CNTs selectively grown by thermal CVD (TCVD) on vertexes of pyramid-shaped protrusions
fabricated on Si substrate. The growth of CNTs by TCVD gave long, randomly oriented and dispersed CNT growth,which was completely different from growth regimes given by plasma enhanced CVD (PECVD), i.e., verticallyA－34

aligned and bundled growth. The array of the CNTs grown by TCVD gave better field emission characteristics thanthat with the CNTs grown by PECVD. That was presumably because the CNTs grown by TCVD gave longer andmore dispersive CNT growth than PECVD and consequently gave higher field enhancement on the CNTs. It is also
shown that the single growth of the CNT is successfully performed using this process.
Growth control of carbon nanotubes by plasma enhanced chemical vapor deposition and reactive ion etching, Hideki
Sato, Koichi Hata, Mai Matsubayashi, Takamichi Sakai, Hideto Miyake, Kazsumasa Hiramatsu, Akinori Ohshita,
Yahachi Saito*: Proceedings of the Eighth International Symposium on Sputtering & Plasma Processes, pp. 209-211,
June 2005
Growth of carbon nanotubes on silicon nanoprotrusions, Hideki Sato, Koichi Hata, Mai Matsubayashi, Takamichi
Sakai, Hideto Miyake, Kazsumasa Hiramatsu, Yahachi Saito*: Technical Digest of the 18th International Vacuum
Nanoelectronics Conference, pp. 268-269, July 2005
Development of micro-focused X-ray source by using carbon nanotubes field emitter, Kunihiko Kawakita, Koichi Hata,
Hideki Sato, Yahachi Saito*: Technical Digest of the 18th International Vacuum Nanoelectronics Conference, pp.
192-193, July 2005
Electron emission properties of carbon nanotube FEAs evaluated with projection microscopy, Koichi Hata, Gohei
Tatsumi, Hideki Sato, Yahachi Saito*, Takashi Tsumagari*: Technical Digest of the 18th International Vacuum
Nanoelectronics Conference, pp. 159-160, July 2005
Electron Nanobiprism Interference Fringes, A. Ohshita, S. Waki, C. Matsuya, K. Hata, K. Iida, B. Cho*, T. Ishikawa*,
C.Oshima*: Abstract of Atomic Level Characterizations for New Materials and Devices '05, 08P15, 2005
Report on the symposium -Joint Session F: Fundamental and Applicatoins of Carbon Nanotubes- [in Japanese], Koichi
Hata, Oyo Butsuri, Vol.74(1), pp.87-88, 2005
Development of Elastic Separator for Polymer Electrolyte Fuel Cells: Electrical and Mechanical Properties ofComposites Made with Different Graphite Shapes, Hirotomo MINAMIYAMA, Hironari TOMITA, Keita KAYANO,
Mami HATTORI, Atsushi KISHISHITA, Yusuke AOKI, Shuhei NAKAMURA: Organic Materials for Electronics
and Photonics, Korea-Japan Joint Forum 2005, pp. 45, 2005
Electrical Insulating AND Heat-Resistive Properties of PDMS-TEOS Hybrid with Different Molar Ratio of TEOS to
PDMS, Makoto SUGIURA, Fumitoshi IMASATO, Atsushi OHNO, Yusuke AOKI, Shuhei NAKAMURA, Takuya
SHINDOU*: Organic Materials for Electronics and Photonics, Korea-Japan Joint Forum 2005, pp. 61, 2005
Electrical Insulating Properties of Polyimide-Silica Hybrid Composite, Yusuke AOKI, Kouichi TACHI, Shingo
HANANO, Seiji MAGARA, Takayuki FUJIWARA*, Shuhei NAKAMURA: Organic Materials for Electronics andPhotonics, Korea-Japan Joint Forum 2005, p.114, 2005
Development of Elastic Separator for Polymer Electrolyte Fuel Cells –Electrical and Mechanical Properties ofComposites- Made with Different Graphite Shapes- (in Japanese), Hirotomo MIINAMIYAMA, Hironari TOMITA,
Keita KAYANO, MAMI HATTORI, Atsushi KISHIMOTO, Yusuke AOKI: IEICE Technical Report OME2005-80,
pp. 1-4, 2005

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Electrical and Mechanical Properties of Polyimide- Silica Hybrid Films Prepared from Site Selective Molecular Hybrid
Method (in Japanese), Kouichi TACHI, Shingo HANANO, Seiji MAGARA, Yusuke AOKI, Shuhei NAKAMURA,
Takashi FUJIWARA*: IEICE Technical Report OME2005-87, pp. 41-45, 2005
Evaluation of the Electrical Insulation and Heat-resistive Properties of PDMS-TEOS Based Hybrid Materials Throughthe Sol-Gel Methods (in Japanese), Makoto SUGIURA, Fumitoshi IMASATO, Atsushi OHNO, Yusuke AOKI,
Shuhei NAKAMURA, Tetsushi OKAMOTO*, Takuya SHINDOU*: IEICE Technical Report OME2005-88, pp.
47-51, 2005