Validity and reliability of a linear positional transducer across commonly practised resistance training exercises     

Harry F. Dorrell  Joseph M. Moore  Mark F. Smith  Thomas I. Gee 《Journal of sports sciences》2019,37(1):67-73

This study investigated the validity and reliability of the GymAware PowerTool (GPT). Thirteen resistance trained participants completed three visits, consisting of three repetitions of free-weight back squat, bench press, deadlift (80% one repetition maximum), and countermovement jump. Bar displacement, peak and mean velocity, peak and mean force, and jump height were calculated using the GPT, a three-dimensional motion capture system (Motion Analysis Corporation; 150 Hz), and a force plate (Kistler; 1500 Hz). Least products regression were used to compare agreeability between devices. A within-trial one-way ANOVA, typical error (TE; %), and smallest worthwhile change (SWC) were used to assess reliability. Regression analysis resulted in R² values of >0.85 for all variables excluding deadlift mean velocity (R² = 0.54–0.69). Significant differences were observed between visits 3-2 for bench press bar displacement (0.395 ± 0.055 m; 0.383 ± 0.053 m), and deadlift bar displacement (0.557 ± 0.034 m; 0.568 ± 0.034 m). No other significant differences were found. Low to moderate TE (0.6–8.8%) were found for all variables, with SWC ranging 1.7–7.4%. The data provides evidence that the GPT can be used to measure kinetic and kinematic outputs, however, care should be taken when monitoring deadlift performance.  相似文献   

The role of the teacher with substance-abusing adolescents in secondary schools     

Ernest A. Collabolletta  Allen J. Fossbender  Thomas Edward Bratter 《Psychology in the schools》1983,20(4):450-455

Before choosing to become involved with students who currently are abusing psychoactive substances, teachers must consider not only the potential consequences and payoffs to them professionally, but also what specifically they can do to help adolescents. This article presents some of the philosophical problems, and suggests potential solutions of how to relate to students who engage in potentially self-destructive, drug-related behavior. There is a need for teachers to become quasi-counselors and consultants, since they are the first line of defense against substance use and abuse.  相似文献   

Teacher pupil control ideology and pupils' projected feelings toward teachers     

Frederick C. Lunenburg  Jack W. Stouten 《Psychology in the schools》1983,20(4):528-533

The relationship between teacher pupil control ideology and pupils' projected feelings toward teachers was examined. The Pupil Control Ideology Form, based on a custodial-humanistic continuum, served as the operational definition for teacher views toward pupil control. Lemeshnik's Draw-A-Teacher technique, a projective device based on a negative-positive continuum, served as the operational definition of pupils' projected feelings toward teachers. A sample of 131 teachers and their students responded to these instruments, respectively. Pearson product-moment correlations indicated that custodialism in teacher pupil control ideology was directly related to pupils' negative feelings toward teachers. Multiple regression analysis indicated that pupil control ideology, followed by teacher sex and grade level, predicted pupils' feelings toward teachers. Further analysis revealed that boys projected more negative feelings toward teachers than did girls.  相似文献   

Cross-cultural training,expatriate self-efficacy,and adjustments to overseas assignments: An empirical investigation of managers in Asia     

AAhad M. Osman-Gani  Thomas Rockstuhl 《Int J Intercult Relat》2009,33(4):277-290

This paper presents the findings of an empirical study that investigated the relationship between cross-cultural training (CCT) effectiveness, self-efficacy, and adjustment of expatriate managers in Asia. Responses of 169 managers from four different national backgrounds, all currently on overseas assignments in Asia, indicate that the relationship between CCT effectiveness and adjustment is mediated by an increase in self-efficacy. Implications of the findings for professional practice and for future research are discussed.  相似文献   

On the liability of the english silks and cottons to become faded; band on the superiority of the silks of trance and the cottons of India in that respect     

Thomas Allsop 《Journal of The Franklin Institute》1826,2(2):81-82

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On the law of expansion of superheated steam     

Wm. Fairbairn  Thomas Tate 《Journal of The Franklin Institute》1862,74(3):173-176

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Was macht den Sport zum Mediensport?     

Dr. Thomas Horky 《Sportwissenschaft》2009,39(4):298-308

The popularity of sports varies to different extents around the world and leads to the question: what is a media sport? This contribution discusses definitional principles with the goal of using a model to establish the basis of categorization for future empirical analysis of diverse sports types. Media sports are defined as characteristic of movement structures in the culturally differentiated media sports complex. Features of media sports are distinguished according to the dimensions of context, organization, and (interactive) structure. It becomes clear that media sports types are not only characterized by cultural grounding, success, and charismatic stars, but can also exhibit structural distinctions. In conclusion, real, media-driven, and medial media sports are differentiated to demonstrate application of the model.  相似文献   

Attentional focus effects as a function of task difficulty   总被引：1，自引：0，他引：1  

Wulf G  Töllner T  Shea CH 《Research quarterly for exercise and sport》2007,78(3):257-264

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Mineral and metallic statistics     

Thomas W. Bakewell 《Journal of The Franklin Institute》1844,38(4):221-223

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Some account of leveling instruments,wide a deseriptioit of one of an improved form     

Thomas Stevenson 《Journal of The Franklin Institute》1844,38(4):217-221

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