Department of Electrical Engineering

Research Output

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Article
1997

Thermal annealing behavior of defects induced by ion implantation in thermally grown SiO2 films

Seol, K. S., Karasawa, T., Ohki, Y., Nishikawa, H. & Takiyama, M., 1997 Jun, In : Microelectronic Engineering. 36, 1-4, p. 193-195 3 p.

Research output: Contribution to journalArticle

6 Citations (Scopus)
1996

A basic study on HTSC bulk motor

Yoshida, K., Takami, H., Kanehiro, M. & Arima, S., 1996 Sep 1, In : Research Reports on Information Science and Electrical Engineering of Kyushu University. 1, 1, p. 117-122 6 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Designing a behavior of a mobile robot equipped with a manipulator to open and pass through a door

Nagatani, K. & Yuta, S., 1996 Apr 1, In : Robotics and Autonomous Systems. 17, 1-2 SPEC. ISS., p. 53-64 12 p.

Research output: Contribution to journalArticle

13 Citations (Scopus)

Door-opening behavior of an autonomous mobile manipulator by sequence of action primitives

Nagatani, K. & Yuta, S., 1996 Nov, In : Journal of Robotic Systems. 13, 11, p. 709-721 13 p.

Research output: Contribution to journalArticle

13 Citations (Scopus)

Effect of implanted ion species on the decay kinetics of 2.7 eV photoluminescence in thermal SiO2 films

Seol, K. S., Ohki, Y., Nishikawa, H., Takiyama, M. & Hama, Y., 1996 Dec 1, In : Journal of Applied Physics. 80, 11, p. 6444-6447 4 p.

Research output: Contribution to journalArticle

48 Citations (Scopus)

Laser-power dependence of absorption changes in Ge-doped glass induced by a KrF excimer laser

Fujimaki, M., Yagi, K., Ohki, Y. & Nishikawa, H., 1996 Jan 1, In : Physical Review B - Condensed Matter and Materials Physics. 53, 15, p. 9859-9862 4 p.

Research output: Contribution to journalArticle

28 Citations (Scopus)

Measurement of reflecting direction from the center frequency of the echo in ultrasonic sensing

Yata, T. & Yuta, SI. I., 1996 Jan 1, In : Advanced Robotics. 11, 3, p. 269-283 15 p.

Research output: Contribution to journalArticle

4 Citations (Scopus)

Obstacle detectability of ultrasonic ranging system and sonar map understanding

Ohya, A., Ohno, T. & Yuta, S., 1996 Jul, In : Robotics and Autonomous Systems. 18, 1-2, p. 251-257 7 p.

Research output: Contribution to journalArticle

17 Citations (Scopus)

Optimal load-shedding using local information

Fujita, G. & Shirai, G., 1996 Jan 1, In : Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi). 116, 2, p. 32-51 20 p.

Research output: Contribution to journalArticle

Photoluminescence study on point defects in buried SiO2 film formed by implantation of oxygen

Seol, K. S., Ieki, A., Ohki, Y., Nishikawa, H. & Tachimori, M., 1996 Jan 1, In : Journal of Applied Physics. 79, 1, p. 412-416 5 p.

Research output: Contribution to journalArticle

37 Citations (Scopus)

Theory and characteristics of novel variable reluctance 1X resolver

Ishizaki, A., Takasaki, K., Shimomura, S., Masaki, K. & Kitazawa, K., 1996 Jan 1, In : Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi). 116, 5, p. 128-137 10 p.

Research output: Contribution to journalArticle

4 Citations (Scopus)
1 Citation (Scopus)

Trajectory tracking control for navigation of the inverse pendulum type self-contained mobile robot

Ha, Y. S. & Yuta, S., 1996 Apr, In : Robotics and Autonomous Systems. 17, 1-2 SPEC. ISS., p. 65-80 16 p.

Research output: Contribution to journalArticle

148 Citations (Scopus)
1995

Autonomous mobile robot simulator-a programming tool for sensor-based behavior

Kimoto, K. & Yuta, S., 1995 Jun 1, In : Autonomous Robots. 1, 2, p. 131-148 18 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)

Decoupled-control method for levitation and propulsion in amphibious train marine-express

Yoshida, K., Takami, H. & Shi, L., 1995 Dec 1, In : Memoirs of the Kyushu University, Faculty of Engineering. 55, 4, p. 467-489 23 p.

Research output: Contribution to journalArticle

12 Citations (Scopus)

Nature of photoluminescence involving transitions from the ground to 4 fn-1 5d1 states in rare-earth-doped glasses

Yokokawa, T., Inokuma, H., Ohki, Y., Nishikawa, H. & Hama, Y., 1995 Dec 1, In : Journal of Applied Physics. 77, 8, p. 4013-4017 5 p.

Research output: Contribution to journalArticle

17 Citations (Scopus)

Photoluminescence study of defects in ion-implanted thermal SiO2 films

Nishikawa, H., Watanabe, E., Ito, D., Takiyama, M., Ieki, A. & Ohki, Y., 1995 Dec 1, In : Journal of Applied Physics. 78, 2, p. 842-846 5 p.

Research output: Contribution to journalArticle

79 Citations (Scopus)

Role of point defects in dielectric breakdown of sio2formed by plasma-enhanced chemical vapor deposition of tetraethoxysilane

Ishii, K., Isshiki, D., Ohki, Y., Nishikawa, H. & Takiyama, M., 1995 Jan, In : Japanese Journal of Applied Physics. 34, 1, p. 205-211 7 p.

Research output: Contribution to journalArticle

15 Citations (Scopus)

Theory and Characteristics of Novel Variable Reluctance Type N-Speed Synchro/ Resolver

Shimomura, S., Ishizaki, A., Masaki, K. & Kitasawa, K., 1995 Apr 1, In : Proceedings of 1995 International Power Electronics Conference (IPEC-Yokohama '95). 1, p. 586-591

Research output: Contribution to journalArticle

Theory and Characteristics on Novel Variable Reluctance 1X Resolver

Ishizaki, A., Takasaki, K., Shimomura, S., Masaki, K. & Kitasawa, K., 1995 Sep 19, In : Proceedings of 6th European Conference Power Electronics Applications (EPE '95). 1, p. 655-660

Research output: Contribution to journalArticle

1994

Decay kinetics of the 4.4-eV photoluminescence associated with the two states of oxygen-deficient-type defect in amorphous SiO2

Nishikawa, H., Watanabe, E., Ito, D. & Ohki, Y., 1994 Jan 1, In : Physical Review Letters. 72, 13, p. 2101-2104 4 p.

Research output: Contribution to journalArticle

149 Citations (Scopus)

Gamma-Ray-Induced Loss of E r3+-Doped Silica-Core Optical Fiber

Koyama, T., Dohguchi, N., Ohki, Y., Nishikawa, H., Kusama, Y. & Seguchi, T., 1994 Jul, In : Japanese Journal of Applied Physics. 33, 7R, 1 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Kinetics of enhanced photogeneration of E′ centers in oxygen-deficient silica

Nishikawa, H., Watanabe, E., Ito, D. & Ohki, Y., 1994 Nov 4, In : Journal of Non-Crystalline Solids. 179, C, p. 179-184 6 p.

Research output: Contribution to journalArticle

18 Citations (Scopus)

Optical characteristics of SiO2 formed by plasma-enhanced chemical-vapor deposition of tetraethoxysilane

Ishii, K., Ohki, Y. & Nishikawa, H., 1994 Dec 1, In : Journal of Applied Physics. 76, 9, p. 5418-5422 5 p.

Research output: Contribution to journalArticle

20 Citations (Scopus)

Point defects in high purity silica induced by high-dose gamma irradiation

Sakurai, Y., Nagasawa, K., Nishikawa, H. & Ohki, Y., 1994 Dec 1, In : Journal of Applied Physics. 75, 3, p. 1372-1377 6 p.

Research output: Contribution to journalArticle

38 Citations (Scopus)
1993

Correlation of preexisting diamagnetic defect centers with induced paramagnetic defect centers by ultraviolet or vacuum-ultraviolet photons in high-purity silica glasses

Nishikawa, H., Nakamura, R., Ohki, Y. & Hama, Y., 1993 Jan 1, In : Physical Review B. 48, 21, p. 15584-15594 11 p.

Research output: Contribution to journalArticle

54 Citations (Scopus)

Enhanced photogeneration of E′ centers from neutral oxygen vacancies in the presence of hydrogen in high-purity silica glass

Nishikawa, H., Nakamura, R., Ohki, Y. & Hama, Y., 1993 Jan 1, In : Physical Review B. 48, 5, p. 2968-2973 6 p.

Research output: Contribution to journalArticle

24 Citations (Scopus)
9 Citations (Scopus)
4 Citations (Scopus)

Various bonding forms of OH groups in hydrogen-treated silica

Kitagawa, M., Nishikawa, H., Ohki, Y. & Hama, Y., 1993 Dec 1, In : Journal of Applied Physics. 74, 4, p. 2378-2380 3 p.

Research output: Contribution to journalArticle

12 Citations (Scopus)
1992

Characterization of ClOx radicals in vacuum-ultraviolet-irradiated high-purity silica glass

Nishikawa, H., Nakamura, R., Ohki, Y., Nagasawa, K. & Hama, Y., 1992 Jan 1, In : Physical Review B. 46, 13, p. 8073-8079 7 p.

Research output: Contribution to journalArticle

13 Citations (Scopus)

Photoluminescence from defect centers in high-purity silica glasses observed under 7.9-eV excitation

Nishikawa, H., Shiroyama, T., Nakamura, R., Ohki, Y., Nagasawa, K. & Hama, Y., 1992 Jan 1, In : Physical Review B. 45, 2, p. 586-591 6 p.

Research output: Contribution to journalArticle

393 Citations (Scopus)

Position identification method for mobile robots using colour images

Iida, S., Tsubouchi, T. & Yuta, SI., 1992 Jan 1, In : Advanced Robotics. 7, 3, p. 261-282 22 p.

Research output: Contribution to journalArticle

Searching unknown 2-D environment by a mobile robot with a range sensor

Iijima, J. & Yuta, S., 1992 Jan, In : Computers and Electrical Engineering. 18, 1, p. 83-98 16 p.

Research output: Contribution to journalArticle

4 Citations (Scopus)
1991

Effect of high-temperature treatment on optical-absorption bands in amorphous SiO2

Dohguchi, N., Munekuni, S., Nishikawa, H., Ohki, Y. & Nagasawa, K., 1991 Dec 1, In : Journal of Applied Physics. 70, 5, p. 2788-2790 3 p.

Research output: Contribution to journalArticle

3 Citations (Scopus)

How to describe the mobile robot's sensor-based behavior?

Suzuki, S., Habib, M. K., Iijima, J. & Yuta, S., 1991 Aug, In : Robotics and Autonomous Systems. 7, 2-3, p. 227-237 11 p.

Research output: Contribution to journalArticle

9 Citations (Scopus)

New language structure for sensor-based actions to describe the real-time behaviour of autonomous robots

Habib, M. K., Suzuki, S., Yuta, S. & Iijima, J., 1991 Apr, In : International Journal of Electronics. 70, 4, p. 653-670 18 p.

Research output: Contribution to journalArticle

Optimal pulse patterns of six‐phase voltage source PWM inverter for double three‐phase wound ac motor

Matsumoto, H. & Takami, H., 1991, In : Electrical Engineering in Japan. 111, 2, p. 125-134 10 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Si - O - Si strained bond and paramagnetic defect centers induced by mechanical fracturing in amorphous SiO2

Munekuni, S., Dohguchi, N., Nishikawa, H., Ohki, Y., Nagasawa, K. & Hama, Y., 1991 Dec 1, In : Journal of Applied Physics. 70, 9, p. 5054-5062 9 p.

Research output: Contribution to journalArticle

24 Citations (Scopus)

Speckle reduction by compact spatial compounding system

Ohya, A., Yuta, S., Shimazaki, T. & Nakajima, M., 1991 Jan 1, In : Japanese Journal of Medical Ultrasonics. 18, 1, p. 1-11 11 p.

Research output: Contribution to journalArticle

1990

A Shift‐Variant Deconvolution for Aperture Correction of Collimator in Emission CT—Experimental Verification

Paek, S., Nakajima, M., Morozumi, T. & Yuta, SI., 1990, In : Systems and Computers in Japan. 21, 2, p. 56-64 9 p.

Research output: Contribution to journalArticle

Autonomous navigation system for mobile robots using a route map

Matsumoto, T. & Yuta, S., 1990 Jan 1, In : Advanced Robotics. 4, 3, p. 243-261 19 p.

Research output: Contribution to journalArticle

Efficient on-line path planning algorithm and navigation for a mobile robot

Habib, M. K. & Yuta, S., 1990 Aug, In : International Journal of Electronics. 69, 2, p. 187-210 24 p.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Generation mechanism of photoinduced paramagnetic centers from preexisting precursors in high-purity silicas

Nishikawa, H., Nakamura, R., Tohmon, R., Ohki, Y., Sakurai, Y., Nagasawa, K. & Hama, Y., 1990 Jan 1, In : Physical Review B. 41, 11, p. 7828-7834 7 p.

Research output: Contribution to journalArticle

89 Citations (Scopus)

High Speed Data Collection System for Magnetic Field Imaging by CT Technique

Saito, H., Saito, F., Yuta, S. & Nakajima, M., 1990 Oct, In : IEEE Transactions on Instrumentation and Measurement. 39, 5, p. 739-744 6 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Magnetic field imaging using computer tomography. Vector reconstruction

Saito, H., Miyamoto, A., Nakajima, M., Morozumi, T. & Yuta, S., 1990 Dec 1, In : Systems and Computers in Japan. 21, 13, p. 69-78 10 p.

Research output: Contribution to journalArticle

A theoretical study of metallic particle motion and particle‐initiated breakdown in GIS

Matsumoto, S., Aoyagi, H., Okubo, H., Kobayashi, N. & Yanabu, S., 1989 Jan 1, In : Electrical Engineering in Japan. 109, 1, p. 22-30 9 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Defects and optical absorption bands induced by surplus oxygen in high-purity synthetic silica

Nishikawa, H., Tohmon, R., Ohki, Y., Nagasawa, K. & Hama, Y., 1989 Dec 1, In : Journal of Applied Physics. 65, 12, p. 4672-4678 7 p.

Research output: Contribution to journalArticle

126 Citations (Scopus)