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269 results on '"Aoki, Katsunori"'

6. Alcohol Consumption and a Decline in Glomerular Filtration Rate: The Japan Specific Health Checkups Study

Author

Kimura, Yoshiki, primary, Yamamoto, Ryohei, additional, Shinzawa, Maki, additional, Aoki, Katsunori, additional, Tomi, Ryohei, additional, Ozaki, Shingo, additional, Yoshimura, Ryuichi, additional, Shimomura, Akihiro, additional, Iwatani, Hirotsugu, additional, Isaka, Yoshitaka, additional, Iseki, Kunitoshi, additional, Tsuruya, Kazuhiko, additional, Fujimoto, Shouichi, additional, Narita, Ichiei, additional, Konta, Tsuneo, additional, Kondo, Masahide, additional, Kasahara, Masato, additional, Shibagaki, Yugo, additional, Asahi, Koichi, additional, Watanabe, Tsuyoshi, additional, Yamagata, Kunihiro, additional, and Moriyama, Toshiki, additional

Published
2023
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11. Report on activities of 'Technical Committee on Mine Closure Activities of the Tono Mine'

Author

Tsurudome, Koji, Suzuki, Hajime, and Aoki, Katsunori

Abstract

国立研究開発法人日本原子力研究開発機構東濃地科学センターでは、2010年度から東濃鉱山閉山措置計画書にしたがって東濃鉱山の閉山措置を進めてきた。東濃鉱山の閉山措置は、鉱業法および鉱山保安法並びに労働安全衛生法などの関連法規に則って作業を行うことになるが、東濃鉱山の閉山措置に関連する技術的事項および周辺環境のモニタリング状況について審議検討を行うため、2013年度から東濃鉱山閉山措置技術検討委員会を東濃地科学センターに設置し、年1回の頻度で、前年度実績と当該年度の計画等について報告し、審議を頂いた。その結果、「閉山措置は計画通り進捗している。また、モニタリングの結果から判断して、鉱山周辺の環境は法令上求められる基準を満たしていると確認できる。」との評価を頂いた。本資料は、2013年度から2019年度にかけて開催した8回の委員会の会議資料を取りまとめたものである。, Tono Geoscience Center, Japan Atomic Energy Agency has been conducting mine closure activities at Tono Mine based on "Plan for closure activities of the Tono Mine" since FY2010. The closure activities of the Tono Mine are carried out in accordance with the Mining Act, the Mine Safety Act and the Industrial Safety and Health Act. In particular, in order to examine the technologies applied to the closure activities of the Tono mine, also the surrounding environmental monitoring, "Technical Committee on Mine Closure Activities of the Tono Mine" was organized at Tono Geoscience Center in FY2013 and the results in the previous fiscal year and the plan for the current fiscal year have been reported and discussed at the annual meeting. As a result, it has been confirmed that the closure activities are making progress as planned and that the environment around the mine meets the legally required standards from the monitoring results. This document is a compilation of meeting materials of all eight committee meetings held between FY2013 and FY2019.

Published
2021

18. Frequency of Breakfast, Lunch, and Dinner and Incidence of Proteinuria: A Retrospective Cohort Study

Author

Tomi, Ryohei, primary, Yamamoto, Ryohei, additional, Shinzawa, Maki, additional, Kimura, Yoshiki, additional, Fujii, Yoshiyuki, additional, Aoki, Katsunori, additional, Ozaki, Shingo, additional, Yoshimura, Ryuichi, additional, Taneike, Manabu, additional, Nakanishi, Kaori, additional, Nishida, Makoto, additional, Yamauchi-Takihara, Keiko, additional, Kudo, Takashi, additional, Isaka, Yoshitaka, additional, and Moriyama, Toshiki, additional

Published
2020
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20. Occupational sedentary behavior and prediction of proteinuria in young to middle-aged adults: a retrospective cohort study

Author

Fujii, Yoshiyuki, primary, Yamamoto, Ryohei, additional, Shinzawa, Maki, additional, Kimura, Yoshiki, additional, Aoki, Katsunori, additional, Tomi, Ryohei, additional, Ozaki, Shingo, additional, Yoshimura, Ryuichi, additional, Taneike, Manabu, additional, Nakanishi, Kaori, additional, Nishida, Makoto, additional, Yamauchi-Takihara, Keiko, additional, Kudo, Takashi, additional, Isaka, Yoshitaka, additional, and Moriyama, Toshiki, additional

Published
2020
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22. Sleep debt and prevalence of proteinuria in subjects with short sleep duration on weekdays: a cross-sectional study

Author

Aoki, Katsunori, primary, Yamamoto, Ryohei, additional, Shinzawa, Maki, additional, Kimura, Yoshiki, additional, Adachi, Hiroyoshi, additional, Fujii, Yoshiyuki, additional, Tomi, Ryohei, additional, Nakanishi, Kaori, additional, Taneike, Manabu, additional, Nishida, Makoto, additional, Kudo, Takashi, additional, Yamauchi-Takihara, Keiko, additional, Isaka, Yoshitaka, additional, and Moriyama, Toshiki, additional

Published
2019
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23. Efficient multiplexing scheme for IP packets over the advanced satellite broadcasting system

Author

Aoki, Shuichi and Aoki, Katsunori

Subjects
Frames (Information theory) -- Analysis, Direct broadcast satellite television -- Analysis, Transmission Control Protocol/Internet Protocol (Computer network protocol) -- Analysis, TCP/IP, Business, Electronics and electrical industries, Engineering and manufacturing industries
Abstract

Implementing an IP-friendly transport mechanism in broadcasting systems would enable more convenient multimedia broadcasting applications. The overhead of current multiplexing methods for IP packets that are based on MPEG-2 systems is large, and they are not well suited for efficient transmission of IP packets. We developed an efficient scheme for transporting IP packets over broadcasting channels. The scheme includes compression of IP header information, transmission control signals for listing IP multicast group addresses, and a simple encapsulation. This paper describes the multiplexing scheme and its theoretical overhead. We conducted an experiment on a prototype transmission system that shows our scheme's efficiency. Index Terms--multiplexing, IP header compression, content download

Published
2009

40. Performance Evaluation of Multiplexing Schemes for IP Packets in Digita Multimedia Broadcasting Systems

Author

Aoki Katsunori, Shuichi Aoki, and Makoto Yamamoto

Subjects
Transmission delay, Computer science, Network packet, business.industry, ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS, Real-time computing, Optical IP Switching, Transmission system, Multiplexing, Computer Science Applications, IP tunnel, Broadcasting (networking), Transmission (telecommunications), Media Technology, Electrical and Electronic Engineering, business, Computer network
Abstract

Broadcasting systems with a transport mechanism for IP packets enable enriched multimedia services when used in conjunction with telecommunication services. We have proposed a multiplexing scheme named “TLV” for the efficient transport of IP packets on advanced satellite broadcasting system. We have also proposed a transport mechanism for IP packets on ISDB-TSB, which is a terrestrial multimedia broadcasting system for mobile reception. The transmission characteristics of these transport mechanisms for IP packets need to be examined prior to developing IP-based broadcasting applications. This paper describes our experiments on the transmission systems of the advanced satellite broadcasting system and ISDB-TSB to show the efficient transmission rate and effective delay variation. The results demonstrate that, on the advanced satellite broadcasting system, more than 99% of the transmission capacity is available for applications and the transmission delay variation is quite small. On ISDB-TSB, approximately 80\% of the transmission capacity is available and the delay variation is also small.

Published
2010

42. Conceptual Design of High-Spatial-Resolution Position-Sensitive Radiation Detector with Single-Electron Transistors

Author

Kenichi Watanabe, Jun Kawarabayashi, Tetsuo Iguchi, Teruhisa Matsui, and Aoki Katsunori

Subjects
Physics, Nuclear and High Energy Physics, business.industry, Transistor, Detector, Resolution (electron density), Analytical chemistry, Radiation, Noise (electronics), Particle detector, law.invention, Optics, Nuclear Energy and Engineering, law, business, Image resolution, Electronic circuit
Abstract

We proposed a new microcalorimetric detector with four single-electron transistor (SET) read-out circuits to act as a real-time position-sensitive radiation detector with a spatial resolution of 100 nm. The proposed detector has micro- calrimeters in a two layer configuration, where the top and second layers work for position and energy determination, respectively. The position sensitive layer has four SETs that work as thermometers to decide the radiation incident position by the differences in SET temperatures caused by the heat flow in the layer. We investigated the SET performance and the heat flow in the substrate at cryogenic temperatures and, in addition, estimated the noise of the SET through simulation studies. It was founded that a temperature resolution of 10 mK could be achieved by using a pico-ammeter with a precision of 5.0 × 10−9 S. We successfully designed a detector configuration that would achieve the spatial and time resolution of 100 nm and 8 μs, respectively.

Published
2006

43. Digital Broadcasting. A Study on Criticality for MPEG-2 Video Coding

Author

Keiichi Kubota, Aoki Katsunori, Yasuaki Kanatsugu, Ryoichi Yajima, and Eisuke Nakasu

Subjects
Computer science, Image quality, Digital coding, Real-time computing, computer.software_genre, Computer Science Applications, Quantitative measure, Criticality, Media Technology, Digital broadcasting, Statistical analysis, Data mining, Electrical and Electronic Engineering, computer, Coding (social sciences)
Abstract

Since picture quality in digital coding depends heavily on such picture characteristics as spatial detail and motion, statistical analysis is required to estimate picture quality in digital broadcasting systems. This paper proposes a new definition of “criticality”, a quantitative measure of difficulty for MPEG-2 video coding, to analyze the picture quality of television programs statistically. Equipment is developed to measure criticality and the relationship between criticality values and assessment test scores is examined for test sequences. The results show that the definition of criticality provides sufficient accuracy to estimate picture quality for a large number of pictures statistically.

Published
1997

44. Proceedings of the 27th Annual Meeting Matsuyama, Japan, November 7–9, 1985

Author

Rogler, C. E., Muto, Yoshihiro, Uchimura, Masayuki, Kijima, Hiroshi, Watanabe, Hidenobu, Kakita, A., Kambayashi, M., Takahashi, T., Saji, Y., Tsuburaya, T., Uchino, J., Ogura, Yoshifumi, Yamagiwa, Hiroshi, Takehara, Y., Yamashita, K., Shimaguchi, Seikoh, Ariyama, Joe, Tomatsu, Sei, Oi, Itaru, Fuji, Tadasu, Noguchi, Takayoshi, Yamao, Kenji, Nakazawa, Saburo, Suzuki, H., Mizumoto, R., Kumon, Masamitu, Ogata, Takuro, Yamamoto, Kenichi, Sasaki, Kenichi, Kida, Hideo, Nimura, Yuji, Hayakawa, Naokazu, Kamiya, Junichi, Shionoya, Shigehiko, Hata, Yoshinobu, Uchino, Jun-Ichi, Yamane, Takaaki, Mori, Katsutaka, Kinoshita, Hiroaki, Inoue, Tadashi, Takayasu, Kenichi, Moriyama, Noriyuki, Makuuchi, Masatoshi, Takasaki, Ken, Tanaka, Seiichi, Shirakawa, K., Misaki, F., Shibue, Tadashi, Tanaka, Keizo, Asaka, Masahiro, Saito, Masao, Yamagata, Susumu, Utiyama, Yasuo, Kobayashi, K., Arakawa, T., Matsueda, Kei, Muraoka, Akira, Umeda, Noritsugu, Mizumachi, Shyuzi, Okita, Kiwamu, Sakaue, Hiroshi, Akamatsu, Kouichi, Aoki, Teruaki, Nagao, Fusahiro, Watanabe, Yozo, Kidokoro, Tsutomu, Nakano, Satoshi, Kumada, Takashi, Kondo, Takaharu, Hayakawa, Tetsuo, Ogawa, Michio, Matsuda, Yasuki, Mori, Takesada, Yasuda, Hideki, Atomi, Yutaka, Ohnishi, Norihito, Kuroda, Akira, Morioka, Yasuhiko, Satake, Katsusuke, Tsuchiya, Ryoichi, Isaji, Shuji, Mizumoto, Ryuji, Yamamoto, Masahiro, Saitoh, Yoichi, Takeda, Kazunori, Taguchi, Susumu, Funatomi, Hitoshi, Hatta, Yoshio, Ono, Mikiko, Itoshima, Tatsuya, Tanaka, Ryoji, Sato, Shunichi, Sugaya, Hitoshi, Futagawa, Shunji, Kobayashi, Kenichi, Kawasaki, Hironaka, Akamatsu, Kouichi, Ohkubo, Hirotada, Kawarada, Yoshifumi, Mizumoto, Ryuji, Hirasawa, Hiroyuki, Odaka, Michio, Isono, Kaichi, Miura, Soichiro, Hamada, Yoshiki, Bamba, Tadao, Chikamochi, Nobuo, Nezu, R., Okada, A., Okuno, Masahiro, Umeyama, Kaoru, Hiwatashi, Nobuo, Nakajima, Kazuyuki, Fuchigami, Tadahiko, Yao, Tsuneyoshi, Matsueda, Kei, Takazoe, Masakazu, Shoda, Ryosuke, Umeda, Noritsugu, Fukushima, T., Kawamoto, M., Mizutani, Kenji, Nakai, Katsuhiko, Aoki, Katsunori, Morioka, Satoru, Baba, Shozo, Sakamoto, Akio, Usui, Sadahito, Fukuda, Yoshihiro, Tamura, Kazutami, Watanabe, Hikaru, Ueno, Takato, Tanikawa, Kyuichi, Oda, Masaya, Morizane, Toshio, Hashimoto, Hiroyuki, Akamatsu, Kouichi, Shimizu, Ichiro, Shima, Kenji, Sasaki, Kohsuke, Okita, Kiwamu, Suzuki, Toshimitsu, Seto, Yoshifumi, Nakashima, Toshiaki, Kiyosawa, Kendo, Imai, Haruhiko, Shimizu, Yukihiro, Sasaki, Hiroshi, Mori, Teruo, Mori, Yoshio, Ogawa, Makoto, Wakashin, Masafumi, Okuda, Kunio, Kawamoto, Chiaki, Ido, Kenichi, Fujise, Kiyotaka, Nagamori, Seishi, Fujikura, Shinichiro, Shimada, Kazuhiko, Yamaguchi, Kazuhito, Fujimura, Yoshinori, Kihara, Tsuyoshi, Kitamura, Hironobu, Fujiyama, Yoshihide, Asakura, Hitoshi, Kobayashi, Kensuke, Nagura, Hiroshi, Koshikawa, Takashi, Murata, Yuji, Kuroe, Kiyoo, Kawanishi, H., Koyama, K., Senda, S., Kiely, J., Harima, Kazuo, Fuji, Tadasu, Furukawa, Masato, Nakata, Toshinori, Kawahara, Hiroyuki, Komi, Nobuhiko, Ishihara, Yukio, Kondo, Satoshi, Nimura, Yuji, Suda, Koichi, Miyano, Takeshi, Inui, Kazuo, Ohnuma, Toshikazu, Hata, Yoshinobu, Uchino, Jun-Ichi, Yamamichi, Noboru, Konishi, Fumio, Morita, Nobuto, Tanikawa, Yutaka, Kitani, Eiichi, Tamura, Toshikazu, Komi, Nobuhiko, Ohta, Tetsuo, Konishi, Kohji, Utsumi, Makoto, Ueda, Noriyuki, Sasaki, Hideto, Ogura, Yoshifumi, Kawamoto, Toshio, Horiuchi, Itaru, Tada, Kouji, Akamatsu, Kouichi, Nakai, Teiko, Yamashita, Katsuko, Ninomiya, Fuyuhiko, Tanikawa, Kyuichi, Naito, Yasuo, Morita, Keiichi, Hachiya, Hitoshi, Takeuchi, Toshihiko, Onuki, Keizo, Ozaki, Toshihiko, Tsuchiya, Y., Nakamura, H., Nagashima, Hideyuki, Matsushiro, Takashi, Nakai, Masahiro, Isaji, Shuji, Takeuchi, K., Watanabe, G., Ito, T., Idezuki, Y., Isogai, Masatoshi, and Hachisuka, Kitao

Published
1986
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46. A new transport scheme for hybrid delivery of content over broadcast and broadband

Author

Makoto Yamamoto, Aoki Katsunori, Kiyoharu Aizawa, Hiroyuki Hamada, Shuichi Aoki, and Yasuaki Kanatsugu

Subjects
Scheme (programming language), Computer science, Broadband networks, business.industry, End user, Multiplexing, Digital multimedia broadcasting, Atomic broadcast, Broadband, business, computer, Transform coding, computer.programming_language, Computer network
Abstract

This paper presents a new media transport scheme that flexibly combines media components on broadcast channels and broadband networks so that end users can conveniently consume favorite content without being aware of its delivery channels. By taking advantage of the different delivery characteristics of broadcast channels and broadband networks, hybrid delivery offers an effective means of stably providing customized content to each user. In hybrid delivery systems, generic components for a wide range of users are delivered on broadcast channels, and additional components customized to users' interests or locations are delivered on broadband networks. Our proposed scheme enables each user to flexibly combine those components. We have implemented the proposed scheme in a prototype hybrid delivery system. The experimental results demonstrate that the scheme achieves hybrid delivery of content on broadcast channels and broadband networks.

Published
2011

48. Effective content delivery method for file-based broadcast system over satellite broadcasting channels

Author

Shuichi Aoki, Makoto Yamamoto, and Aoki Katsunori

Subjects
Metadata, Broadcasting (networking), business.industry, Computer science, Network packet, Server, Header, Overhead (computing), File attribute, business, Multiplexing, Computer network
Abstract

We propose a new efficient file-transport mechanism, which is required for constructing a hybrid content delivery system incorporating broadcasting and telecommunication. Such a system combines different types of delivery channels to make effective content delivery possible. In the system, files of coded audio/video and metadata are transferred as IP packets over broadcasting channels as well as telecommunication networks. A file is segmented into data units, and file attribute information is generated for transferring. IP packets carrying these units and this information are directly multiplexed over broadcasting channels with their header compressed. We conducted experiments to verify our file-transport mechanism with a broadcasting modulator and demodulator. The results of the experiments show that files can be delivered with quite small overhead over broadcasting channels. Consequently, effective content delivery is achieved by adding the file-transport mechanism over broadcasting channels to already launched on-demand services on telecommunication networks.

Published
2010

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