试论篮球运动的节奏

现代篮球运动寓竞技化、智谋化、技艺化于一体,节奏正是这一趋势的最好体现.能否正确而深刻理解篮球运动的节奏并且运用节奏变化来争取比赛的主动权,是一个球队实力的反映,也是一个球队是否成熟的标志.运用文献资料、录像观察、逻辑分析等方法,对篮球运动节奏的表现形式、影响因素及节奏的运用等方面进行分析研究,为篮球运动训练中的节奏训练提供理论参考.     

大学体育后进生的成因与对策研究

体育后进生是大学生中的一个特殊群体.研究这一特殊群体产生的原因,并从中探寻帮助他们摆脱后进的方法,以期为体育教学改革和素质教育提供参考依据.     

Early planetary environments and the origin of life

The prebiotic organic synthesis occurred in a reducing or mildly oxidising atmosphere. There was no dearth of energy sources to drive this reaction. The speculation that life originated in ocean floor vent habitats is supported by the recent discovery of fossil microbes in a mid-Archaean vent ecosystem. Evidence from nucleic acid sequencing that the last common ancestor of all extant life is a hyperthermophile also lends credence to this hypothesis. The first living molecule that held heritable genetic information was probably ribonucleicacid. The course of events that nature would have followed to reach the RNA-world is fairly clear, but simulating this course in the laboratory to reach RNA remains a formidable problem and has little relevance to an early Earth setting. A prolonged period of abiotic chemical evolution undoubtedly preceded the emergence of the first living molecule. P V Sukumaran took his M Tech degree in applied geology from the University of Saugar and has been with the Geological Survey of India since 1974. His interests include petrology, geochemistry, palaeoceanography and organic evolution. He is presently posted as Director in the Department at Nagpur     

Predicting ground reaction forces in running using micro-sensors and neural networks

Measurement of ground reaction force (GRF) in running provides a direct indication of the loads to which the body is subjected at each foot-ground contact, and can provide an objective explanation for performance outcomes. Traditionally, the collection of three orthogonal component GRF data in running requires an athlete to complete a series of return loops along a laboratory based runway, within which a force platform is embedded, in order to collect data from a discrete footfall. The major disadvantages associated with this GRF data collection methodology include the inability to assess multiple consecutive foot contacts and the fact that measurements are typically confined to the laboratory. The objective of this research was to investigate the potential for wearable instrumentation to be employed, in conjunction with artificial neural network (ANN) and multiple linear regression (MLR) models, for the estimation of GRF in middle distance running. A modular wearable data acquisition system was developed to acquire in-shoe force (ISF) data. Matched data sets from wearable instrumentation (source data) and force plate (target data) records were collected from elite middle-distance runners under controlled laboratory conditions for the purposes of ANN and MLR model development (MD) and model validation (MV). In terms of statistical measures of prediction accuracy the MLR model was found to provide a superior level of accuracy for the prediction of the vertical and medio-lateral components of GRF and alternatively, the ANN model provided the most accurate predictions of the anterior-posterior component of GRF. The prediction accuracy of each component of GRF was found to be governed by the inherent signal variability, in which case the vertical and anterior-posterior components were more reliable and subsequently predicted significantly more accurately than the medio-lateral component. The emerging capability for obtaining continuous GRF records from wearable instrumentation has the potential to permit unprecedented quantification of training stress and competition demands in running.     

体育教育实习成绩评估方案的研究

目前关于体育教学实习成绩的评定，各院校做法不一，还没有定论。但就目前各校的评估量表看，普遍较复杂，计算量大，指标多，内容不具体，因而不适用。而且对体育教学大都只重视一次公开课或检查课，对平时课堂教学不大重视。因此，制定出客观、全面、简便易行的评估指标体系就具有很重要的意义。     

影响女大学生参与体育活动的因素分析

运用行为科学理论，通过对665名女大学生参与体育活动情况的调查，揭示了女大学生对待体育活动的认识和实践的状况，分析了影响女大学生参与体育活动的主、客观原因。     

知行哲学在足球运动对抗中的运用研究

足球对抗的实质是相互间知行能力的竞争较量，足球对抗的知行特征为对抗中的知彼知己和避实击虚。