Youth Leaders' Perceptions of Commitment to a Responsibility-Based Physical Activity Program

This study extended Schilling's (2001) study by investigating program commitment among a larger (N = 12), older (M = 16.7 years), and more experienced (M = 5.96 years) sample of participants in the Project Effort Youth Leader Corps. Individual interviews elicited a greater number and specificity of themes. Program-related barriers included logistics, structure, and relationships, and personal-related barriers included perceived alternatives, personal characteristics, and “real-life” responsibilities. Similar to Schilling's (2001) earlier study, antecedents grouped under program environment, program structure, relationships, and personal characteristics. Participants also described outcomes in terms of behavior and emotional involvement but reported more themes related to leadership. Results are discussed in terms of consistencies and changes over time and implications for program development, expansion, and evaluation.     

儿童青少年运动员的营养需要

1. 儿童青少年运动员应该食用多样化的食物，其中，蛋白质应占膳食总能量的12％-15％，碳水化合物至少占55％，而脂肪至多占30％。日常生活中如何吃才能满足这些要求呢？膳食指南宝塔提供了一条可行之道。2.有些营养素对热爱运动的儿童青少年运动员非常重要，要保证摄入充足，这些营养素是碳水化合物（包括纤维素）、维生素B6、维生素D、铁、钙、镁、锌、铬。科学合理、包罗各类食物的平衡膳食，对青少年运动员最大程度地全面摄取各种营养素，满足生长发育和运动训练的需要，是非常必要的。3.鼓励儿童青少年运动员在运动训练前、中、后进行补液，以避免脱水的发生。4.如果膳食合理平衡，就没必要额外补充营养品。     

Working Together: Integrating Computational Modeling Approaches to Investigate Complex Phenomena

Journal of Science Education and Technology - Complex systems are made up of many entities, whose interactions emerge into distinct collective patterns. Computational modeling platforms can provide...     

PHONE HOME? AN ANALYSIS OF HOUSEHOLD TELEPHONE OWNERSHIP

A multivariate, theoretical model is developed and tested topredict household telephone ownership. Factors theorized topredict telephone ownership are 1) socio-economic status/resources,2) household composition, 3) cultural background, 4) attachments,including—a) community/mobility ties, b) civic/politicalties, c) group ties, d) personal ties, e) social and institutionalalienation, and of misanthropy, 5) counter-normative behavior,6) psychological well-being, and 7) physical well-being. Theanalysis, indicates that the socio-economic factor in generaland income in particular has the largest impact. All other factorsalso have significant, independent effects with the exceptionthat some, but not all, of the attachment factors and psychologicaland physical well-being are not related to telephone ownership.Overall, non-telephone households can be characterized as marginaloutsiders.     

Three-dimensional kinematic analysis of the golf swing using instantaneous screw axis theory,Part 2: golf swing kinematic sequence

A number of recent studies have measured the extent and timing of segment rotation during the golf swing. A promising technique, instantaneous screw axis (ISA) theory, could provide a better expression of segment rotation. In Part 1 of this two-part study, the objectives are to identify the ISA of the pelvis, shoulders and left arm during the downswing, compute segment angular velocity relative to that segment’s ISA and verify that ISA theory is a valid tool to analyse segment rotation during the golf swing. Results indicate that for all subjects, at least 71% of marker velocity is a result of rotation about their respective ISA, when averaging results over the duration of the downswing, confirming that motion is primarily rotational. Furthermore, ISA position and orientation of each segment approaches, on average, the expected gross axis of rotation, confirming that motion about the ISA is representative of joint motion.     

(In)civility and adolescents’ moral decision making online: drawing on moral theory to advance digital citizenship education

Education and Information Technologies - This article draws on moral theory to advance digital citizenship education and explore how adolescents aged 13–16 make decisions when confronted with...     

The Imponderable Bloom: A Multimodal Social Semiotic Analysis of an Online Secondary English Course

The use of online learning and other software-powered technologies is on the rise in the United States, encouraged financially and politically by governmental and commercial entities. Specifically, online courses are gaining ground in K–12 public schools, schools which often purchase from third-party providers. After a decade in the New York City Department of Education as an English teacher and schools official responsible for a large-scale online learning programme, the author asks the question: How does the use of software-powered technologies like online learning affect the teaching of literature? In pursuit of this question, the author draws on concept from the field of software studies while adapting qualitative methods from multimodal studies to examine precisely how the nature of software (and the ideologies of those who create and sell it) are subtly influencing the teaching of literature.