著者

奥村 文浩 横山 慶子 山本 裕二 OKUMURA Fumihiro YOKOYAMA Keiko YAMAMOTO Yuji

出版者

名古屋大学総合保健体育科学センター

雑誌

総合保健体育科学 (ISSN:02895412)

巻号頁・発行日

vol.42, no.1, pp.21-24, 2019

---

In massed start bicycle races, riding in a group to avoid air resistance is profitable for racing cyclist to save their energy consumption. In this study, we estimated cyclists' power output and analyzed the relationship to the group size in a national championship of track cycling points race. The results show that the average velocity of the group increased as the number of riders in a group increased to some extent, but the average velocity of the large group decresed as the size of the group increased. These results suggest that the small groups are formed by cyclists intended to raise the pace and, on the other hand, the large groups are formed to save energy cunsumption by cyclists intended not to raise the pace.

著者

山本 裕二 横山 慶子 木島 章文 島 弘幸 YAMAMOTO Yuji YOKOYAMA Keiko KIJIMA Akifumi SHIMA Hiroyuki

出版者

名古屋大学総合保健体育科学センター

雑誌

総合保健体育科学 (ISSN:02895412)

巻号頁・発行日

vol.40, no.1, pp.1-14, 2017-06-30

---

This study considered the movements of the defense lines and the ball during a football game as a three-coupled oscillation. Each defense line of two opposing teams oscillated with in-phase synchronization, and the length between each defense line and the ball oscillated with anti-phase synchronization. We introduced a three-coupled oscillation model to understand these synchronizations. First, we considered the case in which three masses, m, and four spring constants, k, were equal in a three-coupled oscillation. We calculated the eigenvectors and eigenvalues based on the equation of motion, and we obtained three modes of oscillation as three angular frequencies in the equation. We obtained key parameters when we defined the initial state of the system, which allowed us to solve the equation of motion for three-coupled oscillation. Next, we considered cases in which three masses and four spring constants differed. To confirm the validity of the three-coupled oscillation model, we calculated the distribution of the relative phase between two outer masses, m1 and m3, as defense lines and the length between two outer masses and the middle mass, m2, as each defense line and the ball. The three-coupled oscillations showed similar distributions of the relative phase. However, the periodogram showed distinct periodicity. Thus, a more sophisticated model is needed to understand the behavior of the defense lines and the ball during football games.

著者

Maniwa Keiichiro Ishibashi Yasuyuki Yamamoto Yuji Inoue Ryo Otsuka Hironori

出版者

弘前大学

巻号頁・発行日

2013

被引用文献数

6

---

終了ページ : 806

著者

山本 裕二 横山 慶子 Yamamoto Yuji Yokoyama Keiko

出版者

名古屋大学総合保健体育科学センター

雑誌

総合保健体育科学 (ISSN:02895412)

巻号頁・発行日

vol.35, no.1, pp.1-7, 2012-03-30

著者

山本 雄二 Yamamoto Yuji 関西大学 Kansai University

出版者

東洋館

雑誌

教育社会学研究 = The journal of educational sociology (ISSN:03873145)

巻号頁・発行日

vol.43, pp.70-83, 1988-10-03

---

P. Willis's Learning to Labour is one of the most important books in the field of sociology of education. In this book, he attempts to explain how working class kids get working class jobs and why they let themselves. To answer this question, he adopts an ethnographical approach which elucidates what happens to them in school. By setting two classes a priori outside the text (=his ethnography), he takes out some traits of working class culture in which working class kids willingly select manual labour. With his approach, he loses some possibilities of interpretation that lead us to see the text as a whole world in its own right. Therefore, this paper attempts to read the text without setting concepts for explanation such as "class" outside the text. It is contended that this text can be read as a story of self-discipline. Self-discipline can be defined by saying that the temporary self is not a "real self" and that one has to deny oneself to aim at a "real self". Willis's framework of the actors, that is, ear'oles, lads, and teachers may be interpreted in the following manner. Ear'oles, committed to self-discipline, have no concrete culture while lads, being far from self-disciplined, are integrated into a concrete group culture. This difference causes gaps between the two groups in the way they define themselves. Ear'oles cannot define themselves but in contrast lads believe themselves to be complete. Teachers, agents of self-discipline, feel ambivalent towards both ear'oles and lads. The Distinction betwetn self-discipline and two other similar notions -"individualism" by Willis and "internalized norms" by Bowles & Gintis, are made clear in the final part of the paper. Self-discipline, as the ethos of modern education, helps us not only understand the relations among members in school but also causes us to reconsider what modern education is about.