著者

SUGIMURA Nobuo HASHIMOTO Tatsuaki KUWAHARA Toshinori SAKAMOTO Yuji YOSHIDA Kazuya SATO Yuki TAKANO Tomohiro

出版者

一般社団法人 日本航空宇宙学会

雑誌

TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN

巻号頁・発行日

vol.14, no.30, pp.Pf_97-Pf_103, 2016

被引用文献数

1

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<p>A new star sensor for a microsatellite was developed for accurate and reliable attitude detection. Microsatellite RISING-2, which was launched on May 24, 2014, has raised some issues with regard to the functionality of its star sensor. It is confirmed that white spots caused by space radiation and the stray light of sunshine induce a false detection of the satellite's attitude, which imposes significant limitations on satellite operations. To make improvements, the brightness value of the picture was studied. This paper proposes avoidance algorithms for white spots and stray light. The effects of these algorithms were validated to process the flight data from RISING-2 in a software simulation. The soundness of the star sensor is indicated via attitude detection tests against several star patterns using real flight images taken by RISING-2. Thereafter, avoidance algorithms were integrated in a newly developed processing board. In this board, the avoidance algorithm for white spots was composed using both a hardware logic filter and a software filter. The avoidance algorithm for stray light was expressed using only a software filter. During the programming of these algorithms, the functionality of the satellite's attitude detection was verified in a generic test environment. This system displays the entire sky view of stars on a monitor and enables attitude detection tests for all star images regardless of time or location. As a result, the satellite's attitude was detected normally by this board. Finally, the effectiveness of the software filter for the avoidance algorithm for white spots was confirmed by using sample photographs, including those with white spots.</p>

著者

Sato Yuki Mii Akiko Hamazaki Yoko Fujita Harumi Nakata Hirosuke Masuda Kyoko Nishiyama Shingo Shibuya Shinsuke Haga Hironori Ogawa Osamu Shimizu Akira Narumiya Shuh Kaisho Tsuneyasu Arita Makoto Yanagisawa Masashi Miyasaka Masayuki Sharma Kumar Minato Nagahiro Kawamoto Hiroshi Yanagita Motoko

出版者

American Society for Clinical Investigation

雑誌

JCI Insight (ISSN:23793708)

巻号頁・発行日

vol.1, no.11, 2016-07-21

被引用文献数

86

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高齢者腎臓病の新たな病態メカニズムの発見・新規治療戦略の可能性を拓く. 京都大学プレスリリース. 2016-07-22.

著者

研 攻一 佐藤 由紀 トギ コウイチ サトウ ユキ TOGI Kohichi SATO Yuki

出版者

羽陽学園短期大学

雑誌

羽陽学園短期大学紀要 (ISSN:02873656)

巻号頁・発行日

vol.9, no.4, pp.23-36, 2014-02

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遊びの中で造形能力を育てる保育のあり方について検討した。風船を使ったダルマ作りの技術を、お化け屋敷で使う生首や火の玉作りに応用していく際の、子どもたちの遊びの質や、行動の自発性やイメージの拡大と深化の程度について検討した。その結果、次のことが得られた。(1)風船を使った基本的な技術の習得場面のダルマ作りでは、子どもたちは遊び条件を満たさずに、保育者主導の保育が展開された。その際には、行動の自発性やイメージの拡大は余り見られなかった。(2)ダルマ作りの応用場面の生首と火の玉作りでは、遊びの条件を満たし、子どもたちが自発的に意見やイメージの交換を図り、集団で新しい工夫をしてお化け屋敷で必要なものを作りだした。(3)具体的な目標(生首や火の玉)が遊びの中で設定されると、子どもたちの自発性やイメージの拡大が促進されることが見られた。

著者

佐藤 有紀 五十嵐 祐 吉田 俊和 SATO Yuki IGARASHI Tasuku YOSHIDA Toshikazu

出版者

名古屋大学大学院教育発達科学研究科

雑誌

名古屋大学大学院教育発達科学研究科紀要 (ISSN:13461729)

巻号頁・発行日

vol.60, pp.39-47, 2013-12-27 (Released:2014-03-06)

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Today, most Japanese corporations implement a merit pay or pay-for-performance system in order to enhance job performance. This study investigated the effect of pay-for-performance system on employees’ preference for organizational citizenship behavior using the hypothetical Prisoner’s Dilemma. Based on regulatory focus theory (Higgins, 1997), we focused on reward expectation for performance (e.g., promotion) and performance pressure (e.g., fears of failure), both of which presumably affect employees’ approach motivation in a different way. We hypothesized that employees’ reward expectation for performance increases their preference for organizational citizenship behavior while performance pressure decreases it. Three hundred and nineteen Japanese employees completed a take-home questionnaire; however, we only examined 175 of those (126 men and 49 women) who were working under management by objectives. Logistic regression analysis confirmed our hypotheses, suggesting that under pressure employees prioritize their individualized objectives rather than cooperate with others for a common goal. Expectation for reward increased employees’ preference for cooperative behavior when a situation calls for dealing with a coworker’s favor. Furthermore, these results were seen only for employees under pay-for-performance system such that those under the traditional system showed the reverse trend. Future studies should examine situational factors as well as each employee’s approach motivation.