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排序方式: 共有105条查询结果,搜索用时 15 毫秒
101.
Jesús Morenas Martín Vicente Luis Del Campo Marta Leyton Román Juan Miguel Gómez-Valadés Horrillo Juan Santiago Gómez Navarrete 《Journal of sports sciences》2013,31(15):1713-1721
AbstractCurrently, direct empirical evidence exists about the amount of mechanical load that climbers apply to each finger during several hand grips specific to sport climbing, but not yet in a specific hanging position.The objectives of this study are a) to draw and build a solid and rigid support that simulates the real action of a hand grip in a hanging position in sport climbing, to enable the measurement of the mechanical load endured by the fingers in a hanging position and in addition, b) to describe the distribution of mechanical load among fingers as a function of the level of climbing during different hand grips in a hanging position.Thirty young male participants took part in the initial phase of reliability of the measurements, while another 64 male climbers participated in the subsequent study phase to check the relations between independent and dependent variables. The level of on sight climbing and the total practice experience were used to define the groups. The research task consisted of performing hanging positions on the created support in order to measure the mechanical load endured by the fingers in the three most characteristic hand grips in climbing (crimp, half crimp and slope). It has been concluded that the performance level of the climbers had no influence on the production of a pattern of differentiated finger mechanical load during the research task. 相似文献
102.
The aim of the present study was to advance the knowledge of the linguistic development of students with prelingual profound deafness, especially the acquisition and use of prepositions in Spanish, a lexical category with an important role in the verbal comprehension. The researchers sought to learn the level of mastery students with prelingual profound deafness can achieve in the command of prepositions, depending on the system of communication they have been exposed to: classic oralism, Cued Speech, or signed language. The results show that the different systems of communication contribute, to different degrees, to the acquisition of Spanish prepositions, with the best results being obtained with Cued Speech. 相似文献
103.
Educational impact of a school breakfast programme in rural Peru 总被引:1,自引:0,他引:1
In this paper, we present data from an evaluation of the educational impact of a school breakfast programme implemented in rural schools in Peru. The results showed positive effects on school attendance and dropout rates, and a differential effect of the breakfast programme on multiple-grade and full-grade schools. Particularly in multiple-grade schools the programme shows a significant and positive effect on short-term memory, arithmetic and reading comprehension. The evaluation also showed an unexpected negative consequence: students in the breakfast group reduced their time in the classroom with their teachers and increased the time in recess (when they consumed the breakfast). 相似文献
104.
Theories are used in instructional design to produce instruction that is effective and efficient. Learners, however, may not be drawn into instruction because it lacks relevance and appeal. Motivational design theory is used in concert with instructional theory to produce instruction that is both appealing and effective. 相似文献
105.
Lauren C. Shuffrey Santiago Morales Melanie H. Jacobson Michelle Bosquet Enlow Akhgar Ghassabian Amy E. Margolis Maristella Lucchini Kecia N. Carroll Rosa M. Crum Dana Dabelea Arielle Deutsch William P. Fifer Brandon Goldson Christine W. Hockett W. Alex Mason Lisette T. Jacobson Thomas G. O'Connor Nicolò Pini Yael Rayport Ayesha Sania Leonardo Trasande Rosalind J. Wright Seonjoo Lee Catherine Monk program collaborators for Environmental influences on Child Health Outcomes 《Child development》2023,94(6):1595-1609
This study examined the association of gestational diabetes mellitus (GDM), prenatal, and postnatal maternal depressive symptoms with externalizing, internalizing, and autism spectrum problems on the Preschool Child Behavior Checklist in 2379 children aged 4.12 ± 0.60 (48% female; 47% White, 32% Black, 15% Mixed Race, 4% Asian, <2% American Indian/Alaskan Native, <2% Native Hawaiian; 23% Hispanic). Data were collected from the NIH Environmental influences on Child Health Outcomes (ECHO) Program from 2009-2021. GDM, prenatal, and postnatal maternal depressive symptoms were each associated with increased child externalizing and internalizing problems. GDM was associated with increased autism behaviors only among children exposed to perinatal maternal depressive symptoms above the median level. Stratified analyses revealed a relation between GDM and child outcomes in males only. 相似文献