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排序方式: 共有768条查询结果,搜索用时 20 毫秒
721.
Steve Wheeler 《Educational Media International》2013,50(1):31-38
English: This article reviews a study conducted to establish the psychological basis for user responses to digital videoconferencing. Left and right brain laterality and the demographic factors of age and gender were examined as possible predictors of user response. Behavioural and affective responses were measured in a small group of distance learners (n=60). Affective measure ‘A’ concerned user perception of equipment functionality and usefulness, and the intention to repeat the experience, whilst behavioural measure ‘B’ examined anxiety level and self-consciousness. Significant differences were observed between age groups with older participants expressing greater satisfaction with functionality and less anxiety overall. A lesser effect was observed between males and females with the latter reporting higher satisfaction levels and lower anxiety with the technology. No significant difference between left and right brain lateralities was observed. Francais: Cet article rend compte d'une étude conduite pour établir la base psychologique pour les résponses des étudiants à la vidéoconférence digitale. On a pris en compte la latéralité gauche et droite du cerveau et les facteurs démographiques d'âge et de sexe afin d'essayer de mieux prévoir les réactions des usageurs. Les réponses concerenant les attitudes et les réactions affectives ont été mesurées chez un group limité d'étudiants à distance (n=60). La mesure affective ‘A’ concernait la perception de la fonctionalité de l'équipement et de son utlité, ainsi que l'intention de répéter l'experiénce, tandis que les mesures d'attitude ‘B’ examinait le niveau d'anxieté et de conscience de soi. Des différences significatives ont été observées entre les groupes d'âge, les participants plus âgés exprimant davantage leur satisfaction de l'équipement et faisant preuve de moins d'anxiété en général. Un effet moindre a été observé entre les hommes et les fammes, ces dernières étant plus satisfaites et étant moins anxieuses devant la technologie. Aucune difference significative entre les latéralités droite et gauche n'a été observée. Deutsch: In diesem beitrag wird uber eine studie berichtet, die zur herstellung einer psychologischen basis für nutzerreaktionen auf digitales videoconferencing diente. Linke und rechte hirnhälften und der demographische faktor bezüglich alter und geschlecht wurden als mögliche voreinstellungen für das nutzerverhalten untersucht. Das verhalten und affektive reaktionen wurden in kleinen gruppen (N=60) von distance-lernern gemessen: die affektive messung ‘A’ bezog sich auf nutzereinsicht in die ausstattungsfunktionalität und - nützlichkeit sowie die einstellung zu einer wiederholung des experiments, während die verhaltensmessung ‘B’ angstlevel und selbstbewusstsein untersuchte. Signifikante unterschiede wurden festgestellt bei gruppen mit älteren teilnehmern mit höherer zufriedenheitsrate bei der funktionalität und weniger angstüberschuss. Ein geringerer effekt wurde zwischen frauen und männern beobachtet, wobei die ersteren uber höhere zufriedenheit und geringerer technologieangst berichteten. Kein signifikanter unterschied wurde zwischen der linken und der rechten gehirnhälfte beobachtet. 相似文献
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723.
S. Steve Kang 《Religious education (Chicago, Ill.)》2013,108(2):128-130
724.
Steve Leigh 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(3):269-284
The aim of this study was to identify associations between discus throwing performance and the technical parameters of: hip–shoulder and shoulder–arm separation, trunk forward–backward tilt, and throwing-arm elevation angles. Video data of male and female discus throwers' competitive performances were captured during major competitions. Real-life three-dimensional coordinates of 21 body landmarks, and the discus's centre, were obtained for 94 trials using the direct linear transformation procedure. Each technical parameter was reduced at six critical instants. The trend of each parameter across four standards of performance was analysed separately for both sexes. For the female throwers, hip–shoulder and shoulder–arm separations after the flight phase, as well as forward–backward trunk tilts at the beginning and end of the throwing procedure were associated with performance. For male throwers, only the hip–shoulder separation immediately before the flight phase was associated with performance. These findings suggest that the relationships between technical parameters and discus throwing performance are different for males and females. Our results suggest that elite female discus throwers are reliant on effective technique throughout the throwing procedure to achieve long distances, whereas male discus throwers may have a relatively homogeneous technique, and a dependence on physical strength to achieve their long throws. 相似文献
725.
Ian C. Kenny Eric S. Wallace Steve R. Otto 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(3):322-332
The aim of this study was to determine how shaft length affects golf driving performance. A range of drivers with lengths between 1.168 m and 1.270 m, representing lengths close to the 1.219 m limit imposed by R&;A Rules Limited (2008), were assembled and evaluated. Clubhead and ball launch conditions and drive distance and accuracy were determined for seven category 1 golfers (handicaps 0.21 ± 2.41) who performed shots on a purpose-built practice hole. As shaft length increased from 1.168 m to 1.270 m, initial ball velocity increased (+1.8 m/s, P < 0.01). Ball carry (+4.3 m, P = 0.152) also increased, although not significantly so. Furthermore, as shaft length increased, for all club comparisons there was no decrease in accuracy. Ball launch conditions of spin components and launch angle remained unaffected by shaft length. Launch angle increased (0.8°, F = 1.074, P = 0.362) as driver shaft length increased. Our results show that clubhead and ball velocity together with ball carry tended to increase with no loss of accuracy. 相似文献
726.
Steve Wright 《Archival Science》2012,12(4):411-436
This paper will examine a suite of documents generated within one Italian post-war social movement as a means to explore four assertions: (a) that the common practice of addressing the printed word generated by social movements primarily as bearers of linguistic and conceptual content (‘texts’) too often comes at the price of ignoring certain fundamental matters of which the materiality of these documents can inform us; (b) that, connected to this, the lenses of genre and genre repertoire offer important means of deepening our readings not only of the content of social movement documents, but also the broader context of their production and use; (c) used with care, understandings of genre, genre repertoire and the materiality of documents can likewise inform the efforts of those working—in the community, in the history and heritage professions, and at the intersection of all three—to preserve and manage such documents; (d) reflections upon genre, genre repertoire and the materiality of documents may also contribute to the ongoing development of a critical information studies. 相似文献
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728.
Precision prediction based on ranked list coherence 总被引:1,自引:0,他引:1
We introduce a statistical measure of the coherence of a list of documents called the clarity score. Starting with a document list ranked by the query-likelihood retrieval model, we demonstrate the score's relationship to query ambiguity with respect to the collection. We also show that the clarity score is correlated with the average precision of a query and lay the groundwork for useful predictions by discussing a method of setting decision thresholds automatically. We then show that passage-based clarity scores correlate with average-precision measures of ranked lists of passages, where a passage is judged relevant if it contains correct answer text, which extends the basic method to passage-based systems. Next, we introduce variants of document-based clarity scores to improve the robustness, applicability, and predictive ability of clarity scores. In particular, we introduce the ranked list clarity score that can be computed with only a ranked list of documents, and the weighted clarity score where query terms contribute more than other terms. Finally, we show an approach to predicting queries that perform poorly on query expansion that uses techniques expanding on the ideas presented earlier.
相似文献
W. Bruce CroftEmail: |
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