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排序方式： 共有10000条查询结果，搜索用时 16 毫秒
91.
Rony Ibrahim Gert S. Faber Jaap H. van Dieën 《Sports biomechanics / International Society of Biomechanics in Sports》2017,16(1):45-57
Attaining high speed of the stick head and consequently of the ball is essential for successful performance of the drag flick in field hockey, but the coordination pattern used to maximise stick head speed is unknown. The kinematics of the drag flick was studied in ten elite hockey players who performed twenty shots each towards a target located 1.5 m high. A 150 Hz active marker motion analysis system was used, alongside two force plates to detect foot touchdown. Angular velocity and contribution to stick endpoint speed of upper body joints were analysed. Repeated measures ANOVA was used to compare timing of onset and peak angular velocities between joints. Participants used a kinematic pattern that was close to a proximal-to-distal sequence. Trunk axial rotation and lateral rotation towards the target, right wrist flexion and left wrist extension were the main contributors to stick endpoint speed. Coaches should emphasise trunk rotations and wrist flexion and extension movements for maximising stick head speed. Given the high level of the participants in this study, the coordination of joints motions, as reported here, can serve as a guideline for drag flick training. 相似文献
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This article is the third in a series reporting on the changes in attitudes and interests‐‐mainly with respect to physics‐of several hundred students as they proceed through the Danish upper secondary school (Gymnasium). It concentrates on the results of the final investigation which took place shortly before the students leave the school. 相似文献
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Sherrill H Hayes 《Cardiopulmonary Physical Therapy Journal》2010,21(2):22-28
Historically, invited lecturers have often challenged us to define excel lence in physical therapy practice, or in our academic programs. While some have addressed different char acteristics of excellence, our profession has not really come together to address 2 very important questions: what does “quality” mean in physical therapist education? And how do we measure it? Using 3 elements of Friendship, Leadership, and Mentoring, and Defining Excellence and juxtaposing these with Linda Crane and her life, a vision of excellence in physical therapy educational programs was explored in this invited lecture. The text of that lecture ensues.Open in a separate windowGood afternoon everyone. I would first like to thank Dr. Frese, and the Awards Committee of the Cardiovascular and Pulmonary Section for selecting me for this great honor. I would also like to thank Drs. Meryl Cohen and Carol Davis (both previous Linda Crane Lecturers) for nominating me, making me the third person from the University of Miami, on the 10th anniversary of this Lecture.I would also like to assure the cardiopulmonary physical therapists in the audience that while I teach neuroanatomy, I am really an acute care person at heart. I learned a lot from two very notable cardiopulmonary people—(1) The first person was while at Columbia Presbyterian Medical Center in New York City as a new graduate in 1970. We could work overtime on weekends doing chest physical therapy, but we all had to be trained first by the superb pulmonary physical therapist, Micah Rie; and (2) later at Hartford Hospital (in CT) in 1977, where I first met Linda Crane. Thus, I feel I have probably learned from two of the very best.I also have something to share with this audience. We are all familiar with the bumper stickers that say “I Love NY,” or something similar, with the red heart in the middle. The University of Miami is often called simply “the U.” Well, one of my students came to class with this t-shirt (see Figure Figure1).1). Linda would have loved it!Open in a separate windowFigure 1“I Heart U(M).”When trying to decide what to speak about today, I tossed around many ideas. But I realized that I knew Linda most as a teacher. I found this poem that really captured so much of Linda as a teacher:
Teaching is a Lifelong Journey – Donna Bulgur1To teach is to touch the lives of manyand to help us learn life''s lessons.But to teach well is to make a differencein all the lives you touch.
To teach is to be a parent, nurse, friend, and confidant;
to be a supporter, a leader, and a motivator.But to teach well is to be all of these things,yet not lose sight of who you are.You share a part of yourselfwith all whose livesyou have touched.
To teach is to be tender,loving, strong, and giving,to all who rely upon you;to encourage and praise.But to teach wellis to believe in whatand whom you teach.
A teacher comes to masterthese many jobs throughout the years.But those who teach wellrecognize that therewill always be moreto learn in life''s journey,and they never hesitateto strive to learn it.“Friend, Supporter, Leader, Motivator; Believe in what and whom you teach; Always more to learn.” Linda was all of these things. She was one of those inspiring teachers who always strived for excellence. I was Linda''s Chair for 11 years. We''ve all heard of Linda''s good qualities, especially in this forum. Somehow, however, this quote seemed perfect:
“Most great men and women are not perfectly rounded in their personalities, but are instead people whose one driving enthusiasm is so great it makes their faults seem insignificant.” (Charles A. Cerami)As her Chair, I can tell you that Linda had a few faults. She was stubborn, impatient, demanding, and a perfectionist; but she was also dedicated, extremely loyal, caring, and fun-loving. She was a good friend. She was my friend. I felt that if Linda were here today, there are a few things she would expect me to say. I am going to focus on excellence; specifically, leadership and excellence in physical therapy education.I have chosen 3 main themes: (1) educators love to use stories, so I have a little story about friendship and my history with Linda to share with you; (2) the importance of leadership (and mentoring) in our profession; and (3) excellence in physical therapist professional programs –where we are now, and where we need to be. For me, all 3 are intertwined and inseparable, as you will soon see.In short, my goal is to enlighten and entertain, as well as to challenge you. 相似文献
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H. A. Humphreys 《Religious education (Chicago, Ill.)》2013,108(10):899-903
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In this article, we build on Stigler and Becker’s (1977) “consumption capital theory” and propose a novel conceptualization of film quality for the analysis of motion picture franchises. Generally, this theory predicts that the utility consumers derive from a particular good or service increases with prior consumption. We test our theoretical conjectures by drawing on the population of sequels that were running in the US between 1992 and 2011. The empirical results point to the explanatory power of the proposed framework. Film executives may use our findings to improve the profitability of their sequel productions. From a theoretical point of view, consumption capital theory allows for a more refined analysis of sequel performance along different dimensions. Moreover, it may provide a fruitful basis for the analysis of other serial media content, including books, TV, music, and games. 相似文献