Osaka Sangyo University Repository / 大阪産業大学リポジトリ
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Effect of the Changes in the Upper Torso and Upper Limb Joint Movements by Repeated Tennis Service on the Racket Velocity
Get PDF本研究の目的は，打球数の増加による体幹および上肢関節運動の変化がラケット速度へ及ぼす影響を明らかにすることであった。大学テニス選手１名が本研究に参加した。被験者の身体各部位とラケットに貼付した反射マーカーの３次元座標を12台のカメラを用いた モーションキャプチャーシステムを使って得た（250fps）。その結果を次のようにまとめた。
１）打球数の増加にともなってラケット速度は有意に減少した。
２）打球数の増加にともなうラケット速度の低下の主な原因は掌屈角速度の低下であった。また，掌屈角速度の低下は前腕から手部へと流れ込んでくる関節力パワーが減少したことによるものであった。
３）疲労後，手首の屈曲が内旋の回転半径を大きくし，結果的に，内旋によって生み出されたラケット速度を増加させていた。
４）インパクト時の肘の屈曲は肘の屈曲トルクの増加と肩の関節力による正の仕事の減少が原因で，結果として，それがラケット速度を減少させていた。The purpose of this study was to clarify the effect of the changes in the upper torso and upper limb joint movements by repeated tennis service on the racket velocity. One male collegiate tennis player participated in the study. The three-dimensional coordinates of reflective markers attached to the subject and his tennis racket were obtained from images acquired at 250 fps using a 12-camera motion capture system while the subject executed tennis serves. The findings are summarized as follows:
1. Racket head velocity significantly decreased as the tennis serves were repeated.
2. This decrease in racket head velocity with repeated tennis serves resulted from a
reduction in the angular velocity of the wrist palmar flexion, which decreased the
wrist joint-force-power that was transferred from the forearm to the hand.
3. After fatigue, the radius of the shoulder internal rotation was increased by wrist
flexion, and, as a result, the racket head velocity was improved by internal rotation.
4. The elbow flexion caused by the increase of elbow flexion torque and the reduction of positive mechanical work produced by the shoulder joint force caused the racket head velocity to decrease at ball impact.departmental bulletin pape
Results of an Environmental Education Program for Energy Conservation Practice with Reference to a Local Agenda （Local Version Environment Action Plan）
Get PDF本研究は環境省と大阪府地球温暖化防止活動推進センターの事業に協力する形で，本学の学生が小学生対象の省エネ授業プログラムを作成し，大東市内の３小学校で計283名の４年生を対象に授業を実施し，その啓発効果を検証するものである。効果は①児童の環境 問題に対する関心などの授業前後の変化と，②授業後に新たに取り組んだ省エネ行動による二酸化炭素排出削減量によって測定された。結果は①関心や危機感に大きな変化が見られ，②児童の省エネ行動による温室効果ガス削減量は10.8t-CO2と推計された。環境教育プログラムの作成過程で，地域版環境行動計画（ローカルアジェンダ）や，パートナーシップ組織の計画と関連付けたことも，成果の要因の一つと考えられる。This study evaluates the degree of awareness concerning energy conservation gained by 283 fourth grade students at 3 elementary schools in Daito city, who took an energy conservation program for primary schoolchildren. The program was designed by Osaka Sangyo University students as part of a project supported by the Ministry of the Environment and the Osaka Center for Climate Change Actions. Results were measured in two ways; （1） change of children’s interest in environmental problems, a sense of impending crisis about future climate, and willingness to practice energy saving before and after classes, and, （2） reduction of carbon dioxide emissions by the students’ energy saving practices after the classes. Results show, a big change was seen with increased interest and sense of impending crisis. Also, the quantity of greenhouse gas reduced by energy saving actions was estimated at 10.8t-CO2. One reason for these positive results can be the program was made with reference to the local version of the environment action plan （local agenda） and planned in relation to the environmental education program of the partnership organization.departmental bulletin pape
The“Psychic Detective”Character: Its Appearance in the British and American Novel
Get PDFPsychic （occult or supernatural） detectives in fiction enjoy considerable popularity among the public readership. The first character of note is said to be “Dr. Martin Hesselius,” appearing in several stories published in 1872 by the Irish writer Sheridan Le Fanu, and the growth of the genre initially peaked between the late Victorian period and the 1930s. Academic study of the “Psychic Detective” novels, however, has been given much less attention than Gothic Literature or Horror fiction. This paper analyzes several characteristic aspects of this genre, through a discussion comparing it to Gothic novels, ghost stories, and the greater corpus of mainstream detective fiction.departmental bulletin pape
Translation and Annotation of “The Nine Chapters on the Mathematical Art（九章算術）” Vol. 28
Get PDF“The Nine Chapters on the Mathematical Art” was the oldest book of mathematics in China
before the unearthing of “Suan-shu shu.” The aim of our research is to provide a complete
translation and annotation of it including annotations of Liu Hui（劉徽）and Li Chunfeng（李
淳風）from the viewpoint of our previous work on “Suan-shu shu.”
This is the twenty-eighth article based on our research and results in which we studied the
problems 18 of Chapter 8, Fangcheng（方程）.departmental bulletin pape
Case note: Invalidation of a Share Exchange Based on Default of Keeping Documents
Get PDF事前開示書類の備置懈怠を理由として株式交換を無効とした、初めての公刊裁判例である神戸地尼崎支判平成27年 2 月 6 日金判1468号58頁を考察する。組織再編行為は、その手続の瑕疵のう
ち重大なもののみが無効原因になると解されている。事前開示書類の備置懈怠が無効原因になるとする本判決の結論には賛成するが、一般論としては、個別の事案に応じた瑕疵の重大性の検討が必要と考える。
また、平成26年会社法改正で組織再編行為の差止請求権が法定されたが、当該改正は組織再編の無効原因には影響せず、改正後においても本判決の結論は維持されるものと考える。departmental bulletin pape
Introduction of Acoustical Experiment for Students of Engineering Course
Get PDFIn this paper, we described the acoustical experimental methods of that target firstyear students of engineering course in university. Extensive use of teaching materials of handmade, proposed an experiment to draw out the interest of the students within from 6 to 9 hours. The contents divided into application and fundamentals of acoustic. In addition, from the familiar items, it was devised to get with stepwise interest to somewhat advanced topics. Through this experiment, interested about acoustic, it is very useful to get delving into more advanced content such as fault diagnosis by acoustic.departmental bulletin pape
The Work of The Teacher and Found Nature and Teacher Employment Examination — Teaching profession guide lecture note —
Get PDF教職に関する科目の中で教職の意義等に関する科目として，本学では教職入門を開講している。教職の意義に関する科目では，・教職の意義及び教員の役割・教員の職務内容（研修，服務及び身分保障等を含む）・進路選択に資する各種の機会の提供などを内容にするように指示されている。文部科学省が発刊している「教員をめざそう」は，教職全般を概観できる大変有用なリーフレットである。しかし，教員採用試験の部分は，概略すぎて実態が伝わってこない。各都道府県及び政令指定都市によって選考の方法が千差万別で，その共通項を取るとあのようなものになるのは否めない。
そこで，本稿は，教職入門の講義をするにあたり，「進路選択に資する各種の機会の提供」として，教員の仕事と現状，教員の資質について内容をまとめ，補強し，教員採用試験については詳しく解説し，考察を加えようとするものである。departmental bulletin pape