著者
河井 亨
出版者
京都大学大学院教育学研究科
雑誌
京都大学大学院教育学研究科紀要 (ISSN:13452142)
巻号頁・発行日
vol.58, pp.453-465, 2012-04-27

Education researchers have long been interested in the relationship between practice and research. The purpose of this paper was to reconsider this relationship through a critical review of cultural historical activity theory, especially focusing on the works of Y. Engeström. First, I present an overview of the history of cultural historical activity theory. This is followed by a discussion of "developmental work research" and the method (change laboratory) used in Engeström's project. Third, I discuss the methodology of formative intervention adopted by Engeström and that of double stimulation by Vygotsky in laboratory experiments, which is the source of formative intervention. Engeström himself considered the methodology of double stimulation and reactivated it as that of formative intervention. The practices engaged by Engeström, however, were not laboratory experiments but collaborative practice with practitioners. This study indicated that Engeström had not developed his methodology fully because he underestimated the role of the researcher. Engeström actually pointed out that researchers could aim "at provoking and sustaining an expansive transformation process led and owned by the practitioners," but this was meant as an in-practice role, not an out-of-practice role that could open up practices to society, make them accountable, and share responsibility among them. In conclusion, for the construction of a formative relationship between practice and research, it is important for practitioners and researchers to consider both in-practice and out-of-practice roles of researchers.
著者
Atsushi Iwasaki Ken Umeno
出版者
一般社団法人 電子情報通信学会
雑誌
Nonlinear Theory and Its Applications, IEICE (ISSN:21854106)
巻号頁・発行日
vol.7, no.1, pp.30-37, 2016 (Released:2016-01-01)
参考文献数
7
被引用文献数
6

Vector Stream Cipher (VSC) is a stream cipher based on the chaos theory. The algorithm for generating stream keys is very simple and the encryption speed is very fast. Some theoretical attacks for VSC have been reported so far since the invention of VSC in 2004. In this paper, we improve the security of VSC and design a new cipher system “Vector Stream Cipher 2.0” so that the theoretical attacks cannot work. We show that the encryption speed of VSC 2.0 keeps more than 85% of that of VSC, and key-stream of VSC 2.0 has good randomness. The main result of this paper is that our proposed VSC 2.0 is shown to have provable security for attacks with linear masking. Because there is few cryptography based on the chaos theory which has proven security, VSC 2.0 is a rare example.
著者
首藤 明和 西原 和久
出版者
日本社会学会
雑誌
社会学評論 (ISSN:00215414)
巻号頁・発行日
vol.65, no.3, pp.336-343, 2014 (Released:2015-12-31)

世界社会学会議の折に, チャイナ・デイが中国社会学会, 中国社会科学院, 日本社会学会, 日中社会学会の共催で2014年7月15日に開催された. 論題は中国の改革と社会転換. サブテーマは中国の改革とソーシャル・ガバナンス, 社会転換と構造変動・社会移動であった. 東アジア社会学に関する基調講演 (矢澤修次郎) の後, 12名の中国社会学者が中国におけるガバナンス, 不平等, 人口, 都市化, 女性, 世代間格差, 移動などを論じた. この集会で討論者 (首藤明和) が総括したように, 広く論じられている「公的」論点は社会学的に分析され, 聴衆は何が中国社会学の重要論題で, 何が課題かはよく理解できた. だが, 多様性, 民族, 宗教などの論争的論題は十分には論じられなかった. これらも, 中国の社会 (学) にとって重要であろう.とはいえ, 集会自体は成功したと評価できる. なぜなら, 国際学会に際して日中の社会学者が協働し, 研究の共同空間を創造できたからだ. グローバルレベルと東アジアというローカル・リージョナルレベルとの結合は, 国家を超えた交流, 協力に寄与する. もし日本の多数の社会学者が報告し, 議論したならば, さらに対話は進んだだろう. 一国内の知の枠組み――それはしばしば他者の疎外や排除に転化する――を超えることが社会学に要請されている. もちろん, この要請は現実には容易に達成できない. それゆえ, この現実自体も社会学で問われるべき課題だろう.
著者
砂田 宜宏
出版者
東京大学大学院情報理工学系研究科電子情報学専攻
巻号頁・発行日
2012-03-22

報告番号: ; 学位授与年月日: 2012-03-22 ; 学位の種別: 修士 ; 学位の種類: 修士(情報理工学) ; 学位記番号: ; 研究科・専攻: 情報理工学系研究科電子情報学専攻
著者
Hideharu Hagiya Yuto Haruki Taeko Uchida Tomoko Wada Sumiko Shiota Tomoharu Ishida Hiroko Ogawa Tomoko Murase Fumio Otsuka
出版者
一般社団法人 日本内科学会
雑誌
Internal Medicine (ISSN:09182918)
巻号頁・発行日
vol.55, no.1, pp.73-78, 2016 (Released:2016-01-01)
参考文献数
33
被引用文献数
1 2

A 68-year-old man with persistent bacteremia accompanying a large iliopsoas abscess, vertebral osteomyelitis, discitis and central venous port infection caused by methicillin-resistant Staphylococcus aureus (MRSA) was admitted to our hospital. During the course of treatment, the emergence of a daptomycin (DAP)-resistant MRSA strain was confirmed; the minimum inhibitory concentration was 1 to 2 μg/mL for vancomycin and more than 1 μg/mL for DAP. Although the bacterial cell wall was not significantly thickened, an increased positive surface charge and single-nucleotide polymorphism within mprF have been confirmed in DAP-resistant strains. Still rare, but clinicians need to be cautious of the emergence of DAP-resistant MRSA during treatment.
著者
園田 順一 高山 巌 前田 直樹 田中 陽子 栗山 和広
出版者
九州保健福祉大学
雑誌
九州保健福祉大学研究紀要 (ISSN:13455451)
巻号頁・発行日
no.5, pp.77-84, 2004-03

Recently, school refusal and social withdrawal have become huge social issue in Japan. This phenomenon is specific for Japanese society, which is considered to be deeply associated with education and child discipline. The present study examined the process of the development of school refusal and social withdrawal. Also we suggested the treatments and prevention, focusing particularly on child discipline at home.
著者
Urano Sachi
雑誌
研究報告数理モデル化と問題解決(MPS)
巻号頁・発行日
vol.2011-MPS-84, no.11, pp.1-6, 2011-07-11

We present a new method to evaluate the impression of paintings, in terms of a mathematical modeling and quantitative assessments of impression in western painting. The present method is based on a detailed modeling of various factors and elements that consist of the composition of the painting. Impressions of 20 subject-people for 50 paintings are measured using the semantic differential method, which are compared to the impressions calculated with the present method. Their correlation is analyzed with Akaike's Information Criterion (AIC) standard. A strong correlation is obtained.
著者
高橋春佳編著
出版者
太陽社書店
巻号頁・発行日
1933
著者
奥野美代子 著
出版者
先進堂
巻号頁・発行日
1919