Name YOKOI Toshiaki
Official Title Professor
Affiliation Department of Information Systems, Falculty of Informatics
Profile 2009 - Present Tokyo City University, Faculty of Environmental and Information Studies, Department of Information Ecology, Professor
2018 - Present Tokyo City University, head of ICT strategy department of Education development division
2005 - 2009 Musashi Institute of Technology, Faculty of Environmental and Information Studies, Department of Information Ecology, Professor
2002 - 2005 Musashi Institute of Technology, Faculty of Environmental and Information Studies, Department of Information Ecology, Associate Professor
1997 - 2002 Musashi Institute of Technology, Faculty of Environmental and Information Studies, Department of Environmental and Information Studies, Associate Professor
1991 - 1997 Musashi Institute of Technology, Information Processing Center, Assistant Professor
1993 - 1994 Argonne National Laboratory, Advanced Photon Source Group, Visiting Researcher
1991 - 1993 Ministry of Posts and Telecommunications, Institute for Posts and Telecommunications Policy, Special Researcher
1986 - 1991 Musashi Institute of Technology, Information Processing Center, Lecturer
1984 - 1986 Waseda University, Faculty of Science and Engineering, Assistant
Research Field(Keyword & Summary)
  1. (1) Indoor Location Estimation w/ WLAN

    The indoor positioning estimation accompanies difficulty due to the complexity in electromagnetic wave environment and/or the additional cost for apparatuses which enable accurate location estimation. I found the appropriate evaluation of the WLAN received signal strength in time-domain would provide the sufficient accuracy with reasonable cost. The proposed method uses only the ordinal smartphones and typical server for location estimation, but I adopted the mode value of the received signal strength to derive stable WLAN fingerprints. Our preliminary experiment showed sub-meter accuracy in location estimation.

  2. (2) Education on Computer Simulation Techology

    In order to motivate graduate students to learn practically, I developed a computer simulation platform for the training of the design of uniform magnetic field for MRI (Magnetic Resonance Imaging) magnets. The class students utilized this software as an experimental tool in a reporting assignment.

Representative Papers
  1. Utilization of weak received signal strength for accurate indoor position estimation, 2018 IEEE/ION Position, Location and Navigation Symposium, PLANS 2018 - Proceedings 228 - 233 Jun 5, 2018
  2. High-Speed and High-Thrust Linear Induction Motor Designed by using Eigenvalue Analysis Method, IEEE Transactions on Magnetics 28(5) 3327 - 3329 Sep, 1992
  3. An Optimal Design Technique for High Speed Single-Sided Linear Induction Motors Using Mathematical Programming Method, IEEE Transactions on Magnetics 25(5) 3596 - 3598 Sep, 1989
  4. Virtual Sound Imaging System utilizing Java3D Technology, JSME No.06-201 1 - 10 2006
  5. An optimal design technique for mri superconducting magnets using mathematical programming method, IEEE Transactions on Magnetics 24(2) 922 - 925 Mar, 1988
  6. Evaluation of the availability of Java3D API in three-dimensional stereoscopic visualization, Journal of the Japan Society for Simulation Technology 19(3) 192 - 198 Sep 15, 2000
  7. Utilization methodology of the Java platform application programming interface for high-performance numerical simulation environmen, Proceedings of Asian Simulation Conference; System Simulation and Scientific Computing (Shanghai) 328 - 331 2002
  8. Investigation of Secondary Slot Pitches of a Cage-Type Linear Induction Motor, IEEE Transactions on Magnetics 29(6) 2944 - 2946 Nov, 1993
  9. Computer Technology Primer, Ohm publishing company, 1996. ISBN: 4274034666
  10. E-paper Primer, K-Books, 2002. ISBN : 4769312202
Award Award for Excellent Educator, Tokyo City University, 2008.
Award for Excellent Education Improvement, Tokyo City University, 2003.
Award for excellent presentation, The Institute of Electrical Engineers of Japan, 1991.
Grant-in-Aid for Scientific Research Support: Japan Society for Promotion of Science (JSPS)
Research Grants/Projects including subsidies, donations, grants, etc. Trends in Massively Paralleled Computer Technology, NTT, 1997.
Virtual Sound Imaging System for Preventing Traffic Accident in Crossroads, the Ministry of Land, Infrastructure, Transport and Tourism, 2002.
Study on the high-reliability archive system utilizing the Blu-ray disk Cooperative Research, Archive Disk Test center, 2010.
Study on the optimal design technique of eddy-current distribution in Linear Motors, the ministry of education and science,1994.
Recruitment of research assistant(s) No
Affiliated academic society (Membership type) Institute of Electrical and Electronics Engineers
Information Processing Society of Japan
Institute of Electrical Engineering of Japan
Japan Association for Fire Science and Engineering
Japan Society for Simulation Technology
The Institute of Navigation
Japan Society for Disaster Information Studies
Information Systems Society of Japan
Education Field (Undergraduate level) Object-oriented Programming (primar, mid-level, advanced: Java, Processing3, et al.)
Education Field (Graduate level) Computer Simulation Technology, Data Assimilation.