黄旭跳马踺子跳转180°接直体笠松的运动学分析

运用运动生物力学三维录相解析方法、文献资料法和访谈法 ,对黄旭完成的跳马踺子跳转 180°接直体笠松动作进行了运动学分析 ,得出了这一动作的有关参数及一般的运动学规律 .主要从上板踏跳、第一腾空、推手、第二腾空四个部分进行了论述     

亚文化现象与图书馆学研究

本主要阐述了图书馆学研究中的亚化现象,从亚化的内涵及亚化在图书馆研究中的几个具体现象说明了产生这种现象的化根源和现实状况。     

“It's in Your Heart”: How the California Mini-Corps Program and Hispanic Serving Institutions are Transforming Migrant Student Education

ABSTRACT

This paper provides a deep dive case study of the California Mini-Corps Program within the context of an Hispanic Serving Institution.     

Ecological dynamics of continuous and categorical decision-making: The regatta start in sailing

Abstract

Ecological dynamics of decision-making in the sport of sailing exemplifies emergent, conditionally coupled, co-adaptive behaviours. In this study, observation of the coupling dynamics of paired boats during competitive sailing showed that decision-making can be modelled as a self-sustained, co-adapting system of informationally coupled oscillators (boats). Bytracing the spatial–temporal displacements of the boats, time series analyses (autocorrelations, periodograms and running correlations) revealed that trajectories of match racing boats are coupled more than 88% of the time during a pre-start race, via continuous, competing co-adaptions between boats. Results showed that both the continuously selected trajectories of the sailors (12 years of age) and their categorical starting point locations were examples of emergent decisions. In this dynamical conception of decision-making behaviours, strategic positioning (categorical) and continuous displacement of a boat over the course in match-race sailing emerged as a function of interacting task, personal and environmental constraints. Results suggest how key interacting constraints could be manipulated in practice to enhance sailors' perceptual attunement to them in competition.