Relating on-field youth football head impacts to pneumatic ram laboratory testing procedures [0.03%]
现场青年足球头部撞击与气动锤实验室测试程序的关系
Eamon T Campolettano,Steven Rowson
Eamon T Campolettano
A youth-specific football helmet testing standard has been proposed to address the physical and biomechanical differences between adult and youth football players. This study sought to relate the proposed youth standard-defined laboratory i...
David W Sproule,Eamon T Campolettano,Steven Rowson
David W Sproule
Youth football helmets currently undergo the same impact testing and must satisfy the same criteria as varsity helmets, although youth football players differ from their adult counterparts in anthropometry, physiology, and impact exposure. ...
Spatial and temporal analysis of surface hardness across a third-generation artificial turf pitch over a year [0.03%]
第三代人造草坪球场表面硬度的时空分析一年内
Stephanie E Forrester,Felix Tsui
Stephanie E Forrester
Despite the potentially negative effects on play performance and safety, little is currently known about the spatial and temporal variability in the properties of artificial turf pitches. The primary purpose of this study was to quantify th...
Understanding the effects of decompaction maintenance on the infill state and play performance of third-generation artificial grass pitches [0.03%]
了解脱 compaction 维护对第三代人工草坪场地填充状态及运动性能的影响
Paul R Fleming,Stephanie E Forrester,Nicholas J McLaren
Paul R Fleming
Third generation artificial grass pitches have been observed to get harder over time. The maintenance technique of rubber infill decompaction is intended to help slow, or reverse, this process. At present, little is understood about either ...
Comparison of Impact Performance between Youth and Varsity Football Helmets [0.03%]
美式足球头盔撞击性能的对比研究：青年组和校队组的差异
David W Sproule,Steven Rowson
David W Sproule
Current youth football helmets, intended for players under the age of 14 years old, are similar in design and are tested under the same standard as varsity football helmets. This study evaluated the impact performance of matched youth and a...
Jenny de Jong,Robbert Fokkink,Geert Jan Olsder et al.
Jenny de Jong et al.
In a cycling time trial, the rider needs to distribute his power output optimally to minimize the time between start and finish. Mathematically, this is an optimal control problem. Even for a straight and flat course, its solution is non-tr...
Barreira, D.; Garganta, J.; Guimaraes et al.
Barreira et al.
Button, K. D.; Braman, J. E.; Wei et al.
Button et al.