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平成30年度宇宙科学に関する室内実験シンポジウム (2019年2月28日-3月1日. 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS)相模原キャンパス), 相模原市, 神奈川県, 2019 Symposium on Laboratory Experiment for Space Science (February 28 - March 1, 2019. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)), Sagamihara, Kanagawa Japan, 資料番号: SA6000139006

平成29年度衝撃波シンポジウム (2018年3月7日-9日. 東北大学片平さくらホール ）仙台市, 宮城県, (2018年3月7日-9日. 宇宙航空研究開発機構角田宇宙センター ）角田市, 宮城県, Symposium on Shock Waves in Japan, FY2017 (March 7-9, 2018. Sakura Hall), Sendai, Miyagi, (March 7-9, 2018. Kakuda Space Center, Japan Aerospace Exploration Agency (JAXA)(KSPC)), Kakuda, Miyagi, 資料番号: SA6000119065, レポート番号: 2B1-3【若】

本研究は，バスケットボールの公式試合中における各選手とボールの移動距離と移動速度を明らかにし，体力的トレーニングの効果的なコーチング資料を提供することを目的とした。分析対象の試合は，第○○回全国高等学校総合体育大会女子準決勝A高校対B高校（74-68でA高校勝利）であり，撮影された画像を基に，DLT法を用いた三次元画像解析手法により全選手とポールの移動距離・移動速度を算出した。その主な結果は次の通りである。1）高校女子選手の移動距離の平均と標準偏差は5587±171mであった。2）高校女子選手の最高移動速度の平均と標準偏差は7.03±0.51m/sであった。3）最高移動速度に対する移動速度割合の度数分布から，ゲーム中の運動強度割合は高強度：中強度：低強度は5：4：1であった。これらの結果から，バスケットボールにおけるコンディショニングや戦術に関する若干の指導上の示唆が得られた。, The purposes of this study were to measure the movement distances and the movement speed of each player or a ball in the basketball regular game, and to propose effective coaching material about the physical conditioning. The object of Basketball game was the XXth All Japan Inter High School Basketball Championship women's semifinal A-high school vs. B-high school (A high school won at 74-68). In this study, the movement distance/speed of all the players and a ball were calculated by the 3-dimensional photography analysis in which the DLT method was used. Main results were as follows; 1) the average and standard deviation of the movement distance of all the players was 5587±171m, 2) the average and S.D. of the fastest movement speed was 7.03 ± O.51m/s, 3) as a result of calculating the frequency distribution about the speed rate to the fastest movement speed, the rate of the movement intensity in a game was High: Middle: Low =5:4:1. These findings revealed a few strategic considerations to physical conditioning and coaching of basketball.

We have observed an irreversible ultrafast crystalline-to-amorphous phase transition in Ge2Sb2Te5chalcogenide alloy thin film using broadband single-shot imaging spectroscopy. The absorbancechange that accompanied the ultrafast amorphization was measured via single-shot detection evenfor laser fluences above the critical value, where a permanent amorphized mark was formed. Theobserved rise time to reach the amorphization was found to be ～130-200 fs, which was in goodagreement with the half period of the A1 phonon frequency in the octahedral GeTe6 structure. Thisresult strongly suggests that the ultrafast amorphization can be attributed to the rearrangement ofGe atoms from an octahedral structure to a tetrahedral structure. Finally, based on the dependenceof the absorbance change on the laser fluence, the stability of the photoinduced amorphous phase isdiscussed. VC 2014 AIP Publishing LLC.

The purpose of this study was to examine the effects of the number of repetition of a prospective memory task (PMT), the length of the delay interval, and the degree of difficulty of the gross motor task on the PMT performance by using the Einstein-type experimental paradigm. In Experiment 1, each of twenty-five participants repeatedly performed the PMT that 2, 4, 8 and 12 min after initiation of the stepping task. In Experiment 2, one hundred participants were randomly assigned to one of the four conditions. In each condition, the PMT was performed only once. Results of Experiment 1 showed that the PMT performance increased as the number of repetition of the PMT increased with the 2-min delay interval having the poorest performance. Results of Experiment 2 showed that the 4-min delay led to the poorer PMT performance than the 2-min delay interval. In both experiments, the PMT performance was positively correlated to the stepping performance, while the PMT performance was negatively correlated to each of task difficulty and RPE. It was concluded that when the PMT was performed only once, the PMT performance decreased as a function of delay interval. When the PMT was repeatedly performed, however, the PMT performance increased as a function of repetition regardless of delay interval.

The purpose of this study was to examine the influence of two different service forms (basic and applied forms) of the identical server on the accuracy of anticipation of service courses and spins in tennis. The results were as follows: 1. In anticipation of both courses and spins, the accuracy of anticipation was lower for the applied service form than the basic one. Especially the difference was greater in the anticipation accuracy for spins. 2. In anticipation of both courses and spins, the serves hit with the applied form degraded the anticipation accuracy of the receiver in early sequence of service motion. However, there was no difference in the anticipation accuracy between basic and applied forms at the racket-ball contact., 本研究の目的は、同一サーバーによる2つの異なるサービス・フォーム(『基本的フォーム』、『応用的フォーム』)が、テニスのサービス・コースおよび球種予測の正確性に及ぼす影響を検討することである。結果は以下のとおりである。 1 コース予測、球種予測いずれにおいても、『応用的フォーム』に対する予測正確性は、『基本的フォーム』に対するよりも低かった。とくに、球種予測においてその差は顕著であった。 2 コース予測、球種予測いずれにおいても、『応用的フォーム』で打つサービスは、サービス動作の早期におけるレシーバーの予測正確性を低下させた。しかし、インパクト時にはフォームによる予測正確性の差は生じなかった。