The Journal of The Institute of Electronics, Information and Communication Engineers

CONTRIBUTION　
Evaluation of Enterprise Research and Development Activities：A Study on Information and 
Communication Companies
  ...........Research and Development Evaluation WG, The Engineering Academy of Japan    220

TECHNICAL SURVEY　
The Movement of Software Quality Assurance in the Personal Oriented Age
  ..................................................................Kazuyoshi KOIMARU    223
Health Effects and Protection Guidelines of ELF Electromagnetic Fields
  ..................................................................Yoshifumi AMEMIYA    227
The Concept and the Future of Superdistribution..........................Ryoichi MORI    233
Development of High-Speed Polymer Optical Fiber...Takaaki ISHIGURE and Yasuhiro KOIKE    238
Recent Issues in Map Technologies and Applications
  ..............................................Masami TAKAHASHI and Kenichi ICHIKAWA    244

TUTORIAL SERIES　
Analysis and Design of Microwave Circuits/Devices Based on the Concepts of Circuit 
Invariant and Equivalent Admittance [�U]：Circuit Invariant and Figure of Merit 
for Microwave Circuits and Devices....................................Kiyomichi ARAKI    250

EDUCATIONAL COURSE　
Why Traffic Jam Occurs..............................................Masahiko KATAKURA    255
Home Network.............................................................Norio TAMAKI    258

FOR STUDENTS　
Remote Sensing of Space Plasma via Plasma Wave Observation
  .................................................Hiroshi MATSUMOTO and Isamu NAGANO    261

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