第12届全运会安徽省女子手球身体形态特征的研究

采用文献资料法、实际测量法分别对安徽省女子手球队16名运动员进行身体形态指标的测量工作,测量得出相关指标数据,并且利用SPSS20.0统计软件对安徽女子手球队队员及国家队队员身体一般形态各项指标等数据进行整理和分析,最后对测量出的安徽女子手球队不同位置队员各项数据进行对比分析,找出差异和相似性.     

Validity of a portable force platform for assessing biomechanical parameters in three different tasks

The aim of this study was to determine the precision and accuracy of the vertical and anterior–posterior force components of the portable PASCO PS-2142 force plate. Impulse, peak force, and time to peak force were assessed and compared to a gold standard force plate in three different tasks: vertical jump, forward jump, and sprint start. Two healthy male participants performed ten trials for each task, resulting in 60 trials. Data analyses revealed good precision and accuracy for the vertical component of the portable force plate, with relative bias and root mean square (RMS) error values nearly the same in all tasks for the impulse, time to peak force, and peak force parameters. Precision and accuracy of the anterior–posterior component were lower for the impulse and time to peak force, with relative bias and RMS error values nearly the same between tasks. Despite the lower precision and accuracy of the anterior–posterior component of the portable force plate, these errors were systematic, reflecting a good repeatability of the measure. In addition, all variables presented good agreement between the portable and gold standard platforms. Our results provide a good perspective for using the aforementioned portable force plate in sports and clinical biomechanics.     

The geometric curvature of the spine during the sirshasana,the yoga’s headstand

This study analysed the behaviour of the geometric curvature of the spine during sirshasana. The position of dorsal retroreflective markers was computed via stereophotogrammetric analysis in six males and five females (29.4 ± 8.8 years, 63.0 ± 11.4 kg, 1.66 ± 0.08 m [average ± standard deviation]). The spinal points were projected onto the sagittal and frontal planes of the trunk, a polynomial was fitted to the data and the two-dimensional geometric curvature was quantified. The inferior lumbar lordosis decreased compared to the orthostatic position and gait, which may favour the posterior protrusion of the lumbar spinal nucleus pulposus in people with posterior herniation. The lateral deviation at the middle of the thoracic spine increases during sirshasana, which may reflect increased difficulties for postural control and spinal loads. It could be useful for promoting positive spinal structural and functional chronic adaptations for healthy participants, if the yoga programme is carefully planned and the spinal alignment is carefully monitored during a headstand. However, it may aggravate some spinal diseases, especially scoliosis.     

Fútbol para Todos (Soccer for All): Democratization,Populist Legitimization or Quasi-Authoritarianism?

Abstract

In 2009 the Argentine government of Cristina Fernández de Kirchner created Fútbol para Todos (Soccer for All), a programme that led to a policy of direct state intervention in the acquisition of government television rights for the transmission of soccer matches throughout Argentina. Does Fútbol para Todos serve as a tool for the democratization of Argentinean society, a strategy for populist legitimization, or as an embodiment of quasi-authoritarianism? Successive Argentine governments have politicized soccer. Fútbol para Todos has served as a tool for populist legitimization, but also as a strategy designed to legitimize state interference in a historically private domain, promote government propaganda through a new state monopoly, and strengthen governance processes through popular approval under the ambit of the ‘democratization’ slogan. Fútbol para Todos thus aims to use the state as an agent in the construction of better governance processes for all, but it also reinforces the historical union between soccer and establishment political power in Argentina. Fútbol para Todos is populist in tone and appears democratic, but also masks a darker undercurrent of quasi-authoritarian tendencies in Argentina.     

Overshadowing in the spatial domain

In Experiments 1 and 2, rats were trained in a Morris water maze to locate a hidden platform, the location of which in the circular pool was defined by four visual landmarks (A, B, C, and D), spaced at equal intervals around the edge of the pool. Control animals were trained with these four visual landmarks only. But for animals in the overshadowing groups, an auditory component, X, was added to Landmark D. Test trials, given at the end of training, consisted of placing the rat in the pool with no platform present and recording the time rats spent in the platform quadrant. In Experiment 1, the overshadowing group spent less time in the platform quadrant than controls when tested with D, but the two groups performed equally well on test trials that did not use D. We conclude that the auditory Component X overshadowed the visual Landmark D. In Experiment 2, we obtained evidence of reciprocal overshadowing, of D by X and of X by D. The results of Experiment 3 suggested that an appeal to generalization decrement might not be sufficient to explain these overshadowing effects.     

The belief revision model: asymmetrical effects of noncontingency on human covariation learning

A noncontingent experience affects the subsequent detection of positive and negative contingencies between the same events. Experiments 1 and 2 showed that such preexposure can produce both an impairment in the detection of subsequent positive contingency and a facilitation of a negative one, independent of the level of contingency during the contingent phase. Experiment 3 raised difficulties for a model that assumes that associations to the context can explain this asymmetrical effect. Experiment 4 suggested that the different weights usually assigned to the different types of trials when computing the contingency between events can change as a result of a noncontingent experience with the same events. This change supports an account of the asymmetrical effect by a belief revision model based on a mechanism that updates the weights of the different trial types as a function of previous experience. More generally, the belief revision model is a statistical (i.e., nonassociative) model of learning that is capable of accounting for trial-order effects, which have long posed problems for statistical models.     

The Responses of Higher Education Institutions to Global Challenge: Innovative Universities and Human Resources Development

Before a higher education institution can develop international impact and reputation, it must first have developed its regional impact and reputation. Universities can contribute to the creation of wealth in given regions in a number of ways, not the least of which is technology transfer, the creation of firms and other spin‐off activities, and the furtherance of the their reputations for excellence. Staff and students spend a good deal of money in such regions, thus increasing regional wealth, and if given institutions pursue entrepreneurial policies in regard to the course programmes that they offer, their graduates will not only find nearby employment but will create employment for others. The “Innova” Project of the Polytechnic University of Catalonia is an illustration of how a major regional university is attempting to apply new teaching models to enhance entrepreneurial culture in the Barcelona area of Spain and thereby to increase regional human capital.     

Scholarly Communities at the Crossroads: Internationalizing Sociological Networks in Valparaíso,Chile (2003–2019)

Minerva - Achievements and tensions derived from the internationalization of national scholarly communities have attracted extensive attention. However, very little is hitherto known about the...     

Are preschool children active enough? Objectively measured physical activity levels

The present study aimed to describe accelerometer-based physical activity levels in 4- and 5-year-old children (N = 76) on 2 weekdays and 2 weekend days. The children were sedentary for 9.6 hr (85%) daily, while they engaged in moderate to vigorous physical activity (MVPA) for 34 min (5%). Only 7% of the children engaged in MVPA for 60 min per day, and only 26% reached the standard of 120 min of total activity. Their engagement in MVPA did not significantly differ between weekend and weekdays. Mean activity counts and minutes in MVPA did not differ between genders. Physical activity levels in this sample of preschool children were far lower than recommended.