Department of Electrical Engineering

Research Output

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Article
1992

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)
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)
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)
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

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)
1997
2 Citations (Scopus)

Changes in the optical properties of Ge-doped silica glass during exposure to a KrF excimer laser

Miyake, Y., Nishikawa, H., Watanabe, E. & Ito, D., 1997 Dec 11, In : Journal of Non-Crystalline Solids. 222, p. 266-271 6 p.

Research output: Contribution to journalArticle

14 Citations (Scopus)

Energy states of Ge-doped SiO2 glass estimated through absorption and photoluminescence

Fujimaki, M., Ohki, Y. & Nishikawa, H., 1997 Feb 1, In : Journal of Applied Physics. 81, 3, p. 1042-1046 5 p.

Research output: Contribution to journalArticle

42 Citations (Scopus)
2 Citations (Scopus)

Local optimal load-shedding with allowance for voltage deviation

Fujita, G. & Shirai, G., 1997 Jan 1, In : Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi). 119, 1, p. 35-44 10 p.

Research output: Contribution to journalArticle

Luminescence properties of sol-gel synthesized silica glass induced by an ArF excimer laser

Mukasa, K., Ono, M., Wakabayashi, R., Ishii, K., Ohki, Y. & Nishikawa, H., 1997 Jan 21, In : Journal of Physics D: Applied Physics. 30, 2, p. 283-285 3 p.

Research output: Contribution to journalArticle

4 Citations (Scopus)

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)
1998

Decoupled-control of levitation and propulsion in underwater LM car ME02

Yoshida, K., Takami, H. & Shi, L., 1998 May 1, In : Mathematics and Computers in Simulation. 46, 3-4, p. 239-256 18 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)

Fast-bearing measurement with a single ultrasonic transducer

Yata, T., Kleeman, L. & Yuta, S., 1998 Jan 1, In : International Journal of Robotics Research. 17, 11, p. 1202-1213 12 p.

Research output: Contribution to journalArticle

10 Citations (Scopus)

High Resolution Variable Reluctance Synchro and its Application for PM Vernier Motor Drive

Ishizaki, A., Miyazawa, A. & Shimomura, S., 1998 Jan 1, In : IEEJ Transactions on Industry Applications. 118, 10, p. 1185-1192 8 p.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Remote museum system using a networked robot

Maeyama, S., Yuta, SI. I. & Harada, A., 1998 Jan 1, In : Advanced Robotics. 13, 3, p. 315-316 2 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Structures and generation mechanisms of paramagnetic centers and absorption bands responsible for Ge-doped optical-fiber gratings

Fujimaki, M., Watanabe, T., Katoh, T., Kasahara, T., Miyazaki, N., Ohki, Y. & Nishikawa, H., 1998 Jan 1, In : Physical Review B - Condensed Matter and Materials Physics. 57, 7, p. 3920-3926 7 p.

Research output: Contribution to journalArticle

86 Citations (Scopus)
1999

Characteristic red photoluminescence band in oxygen-deficient silica glass

Sakurai, Y., Nagasawa, K., Nishikawa, H. & Ohki, Y., 1999 Jul, In : Journal of Applied Physics. 86, 1, p. 370-373 4 p.

Research output: Contribution to journalArticle

36 Citations (Scopus)

Defects in thermal oxide studied by photoluminescence spectroscopy

Nishikawa, H., Stathis, J. H. & Cartier, E., 1999 Aug 30, In : Applied Physics Letters. 75, 9, p. 1219-1221 3 p.

Research output: Contribution to journalArticle

4 Citations (Scopus)
42 Citations (Scopus)