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Susumu Harashima

dblp:167/6537 · DBLP profile ↗
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2ranked-venue papers
2as first author
0since 2021 · last 1986
—ORCID · none

Domains — the database's venue-derived domains; a paper can count in several

Computer networks · 2 · 2 first-author

Expertise — from the expertise taxonomy: the topics of the expert's papers under the CCF categories. A weight counts papers with recency: 1 for a paper about the topic, 0.3 when the topic is its context, halved every five years.

Computer networks
2 papers
Internet architecture and protocols · 53% Optical networks · 26% Content delivery and video streaming · 13%
Computer graphics and multimedia
1 paper
Virtual and augmented reality · 100%
Human-computer interaction and pervasive computing
1 paper
Usability and user experience research · 100%

Topics — the 5 heaviest of 7, each with the papers that count most for it

TopicWeightPapersLastEvidence papers
Internet architecture and protocols
broadband network		 0.011986
High-Speed and Broad-Band Communication Systems in Japan · IEEE J. Sel. Areas Commun. 1986
Optical networks › optical access network
fiber optic subscriber loop		 0.011986
High-Speed and Broad-Band Communication Systems in Japan · IEEE J. Sel. Areas Commun. 1986
Internet architecture and protocols › high-speed networks
high-speed network architecture		 0.011986
High-Speed and Broad-Band Communication Systems in Japan · IEEE J. Sel. Areas Commun. 1986
Virtual and augmented reality
user experience		 0.011981
Japanese VIDEOTEX System "CAPTAIN"-Experimental Service and User Reactions Outline · IEEE Trans. Commun. 1981
Transport protocols and congestion control › real-time communication
video conferencing		 0.011986
High-Speed and Broad-Band Communication Systems in Japan · IEEE J. Sel. Areas Commun. 1986

Methods — techniques the papers use, named apart from their topics

questionnaire survey · 0.0
YearPublicationVenuePosition
1986 High-Speed and Broad-Band Communication Systems in Japan
abstract
This paper presents the current state of each high-speed and broad-band system and the development of the high-speed and broad-band network (HBN) in Japan. System configuration of a video conference system, a video transmission system, a high-speed digital circuit system, and so on, are introduced. Fundamental technologies to realize HBN, 1) switching technologies to handle broad bit-rate class transmission, 2) high-capacity transmission and high-speed digital terminal technology, 3) economical fiber optic subscriber loop technology, and 4) high-performance video codec technology, are discussed. Based on the above discussion, configuration of HBN is proposed.
Susumu Harashima, Hidetoshi Kimura
 IEEE J. Sel. Areas Commun.1
1981 Japanese VIDEOTEX System "CAPTAIN"-Experimental Service and User Reactions Outline
abstract
The CAPTAIN system is a VIDEOTEX system in Japan. Existing telephone lines are used for transmission and home TV sets are used for the display units. The first experimental service (with 1000 user terminals, 199 information providers, and 100 000 displays frames) was carried out from December 1979 to March 1981 by the Ministry of Posts and Telecommunications and the Nippon Telegraph and Telephone Public Corporation. Based on surveys carried out to obtain opinions on the system, the first experimental system was improved and the second experimental service (with 2000 user terminals, 200 000 display frames) was started in August 1981. The system uses the pattern transmission method so as to display pictures precisely. This method transmits dot pattern information intact between a center and home terminals, allowing the system to display not only handwritten pictures but also complex shaped characters, such as Kanji (Chinese ideograph) characters, Arabic characters, Korean syllabary, etc. According to a questionnaire sent to users, many want to utilize this system when the commercial service starts. Display attractiveness is evaluated highly by these users, verifying the effectiveness of the pattern transmission method. This paper describes: experimental service outline system functions and new techniques for this system (especially display characteristics and transmission method) user reaction to this system
Susumu Harashima, Takao Kumamoto, Tadashi Kitamura
 IEEE Trans. Commun.1