著者
衣笠 一樹 石川 将人 大須賀 公一
出版者
公益社団法人 計測自動制御学会
雑誌
計測自動制御学会論文集 (ISSN:04534654)
巻号頁・発行日
vol.49, no.8, pp.755-762, 2013 (Released:2013-08-27)
参考文献数
8
被引用文献数
1 3

In this paper, we propose a robotic model of a casterboard, which is a commercial variant of skateboards with twistable footplates and passive inclined caster wheels. We then derive its mathematical model in the form of nonlinear state equation; this system is of much interest from both mechanical and control points of view as a new challenging example of nonholonomic mechanics. Based on an observation in the preceding works concerning locomotion control for nonholonomic systems, we propose a locomotion control method with sinusoidal periodic control to realize forwarding and turning locomotion. The proposed idea is examined by simulations and physical experiments using the prototype robot developed by the authors. Moreover, we also examine influence of the parameters in sinusoidal reference signals on the robot's behavior.
著者
Koichiro Shiba Takuya Kawahara
出版者
Japan Epidemiological Association
雑誌
Journal of Epidemiology (ISSN:09175040)
巻号頁・発行日
pp.JE20210145, (Released:2021-06-12)
参考文献数
49
被引用文献数
1 44

Methods based on propensity score (PS) have become increasingly popular as a tool for causal inference. A better understanding of the relative advantages and disadvantages of the alternative analytic approaches can contribute to the optimal choice and use of a specific PS method over other methods. In this article, we provide an accessible overview of causal inference from observational data and two major PS-based methods (matching and inverse probability weighting), focusing on the underlying assumptions and decision-making processes. We then discuss common pitfalls and tips for applying the PS methods to empirical research and compare the conventional multivariable outcome regression and the two alternative PS-based methods (i.e., matching and inverse probability weighting) and discuss their similarities and differences. Although we note subtle differences in causal identification assumptions, we highlight that the methods are distinct primarily in terms of the statistical modeling assumptions involved and the target population for which exposure effects are being estimated for.
著者
南茂 由利子
出版者
大阪府立大学大学院人間社会学研究科
雑誌
人間社会学研究集録 (ISSN:1880683X)
巻号頁・発行日
vol.3, pp.3-26, 2008-02-29

The gender guidelines for asylum determination are the legal instrument expected to compensate for silence concerning gender-related persecution in the Refugee Convention. This paper focuses on Canadian and US decisions concerning gender-related asylum cases in order to examine the effects and functions of these guidelines. My argument centers on the cases of Muslim women who sought asylum from gender-related persecution, supposedly caused by their 'oppositional' or 'unfavorable' attitudes or opinions towards the code of dressing, conduct or ethics of Muslim societies. By studying the description of these women refugees in asylum decisions, I show how they are defined as 'victims of Islam' and how their image as vicims is then used to convey a negative image of Islam. The case of Nada, an asylum seeker to Canada, is especially striking, because the media portrayal of Nadia's case was effectively controlled by the host country, while the Nadia's own view of Islam was both ignored and denied. Muslim websites and Muslim feminist writers persuasively expose the problematic issues that arise from such cases. This investigation leads me to raise questions about the humanitarian effects and functions of the gender guidelines. Indeed, the guidelines may have a detrimental function by fostering negative stereotypes of Islam.
著者
中村 茂子
出版者
実践女子大学
雑誌
実践女子大学美學美術史學 (ISSN:09122044)
巻号頁・発行日
vol.23, pp.25-37, 2009-03-05
著者
Ryogo Minamimoto Masatoshi Hotta Masahiro Ishikane Takeshi Inagaki
出版者
National Center for Global Health and Medicine
雑誌
Global Health & Medicine (ISSN:24349186)
巻号頁・発行日
pp.2020.01056, (Released:2020-07-20)
参考文献数
46
被引用文献数
20

Following a lot of reports of coronavirus disease 2019 (COVID-19) CT images, the feature of FDG-PET/CT imaging of COVID-19 was reported in several articles. Since FDG accumulates in activated inflammatory cells, FDG-PET/CT has huge potential for diagnosing and monitoring of inflammatory disease. However, FDG-PET/CT cannot be routinely used in an emergency setting and is not generally recommended as a first choice for diagnosis of infectious diseases. In this review, we demonstrate FDG-PET/CT imaging features of COVID-19, including our experience and current knowledge, and discuss the value of FDG-PET/CT in terms of estimating the pathologic mechanism.
著者
遠藤 誠作
出版者
北海道大学公共政策大学院
雑誌
年報 公共政策学
巻号頁・発行日
vol.9, pp.169-183, 2015-03-31

The times when population decreased began in Japan, and time to reconsider a method of the conventional sewer construction came. Because individual processing is effective in the area having low population density, I think about the maintenance that utilized a septic tank.
著者
小谷 敏
出版者
三田社会学会
雑誌
三田社会学 (ISSN:13491458)
巻号頁・発行日
no.11, pp.20-36, 2006

特集: 子どもたちと他者 : コミュニケーションの変貌と現代社会1. 仮面ライダーたちの変貌(1) 平成の仮面ライダー(2) 鏡としての「クウガ」2. 大人も子どもももういない。(1) 世代間文化障壁のメルトダウン(2) 「見捨てられた」若者たち3. ユースフォビアの方へ(1) 「凶悪なモンスター」としての若者や子ども(2) 甘ったれた寄生虫 : 引きこもり・ニート・パラサイト・シングル4. ナルシシズム文化の運命(1) 「代行的消費者」としての子どもたち(2) 死を拒絶する文明(3) 急がされる子どもたち(4) 子どもの権利の方へ
著者
山田 恒夫
出版者
国立研究開発法人 科学技術振興機構
雑誌
情報管理 (ISSN:00217298)
巻号頁・発行日
vol.57, no.6, pp.367-375, 2014-09-01 (Released:2014-09-01)
参考文献数
6

2013年は日本におけるMOOC元年といってもよい年になった。日本のトップ大学が北米のグローバルMOOCコンソーシアムに参加し英語版MOOCを開講し,日本版MOOCであるJMOOCが結成された。また2014年から日本語のMOOCを順次開講し,どちらも数のうえでは十分な成功を収めた。その一方,MOOC発祥の地,北米では,「MOOCは終わった」との論調も強くなり,MOOCの評価や再定義が始まっている。このような状況において,JMOOCを含む,後発の地域MOOCコンソーシアムは,MOOC現象の本質を見極め,それぞれの文脈に応じて,進化させていく必要がある。本稿では,コースとしての質保証,持続可能性・可能なビジネスモデル,ビッグデータと学習解析,次世代の生涯学習の観点から論じた。