The Potential of Children’s Health Centers in Organizing the Coordinating Training of Young Tennis Players During Their Attendance Outside the Training Process

Цель представленной статьи заключается в оценке возможностей детских оздоровительных центров в организации координационной подготовки юных спортсменов, занимающихся настольным теннисом. Необходимость решения данной проблемы заключается в важности поддержания требуемого уровня координационной подготовленности юных спортсменов в период их пребывания вне учебно-тренировочного процесса как условия обеспечения успеха соревновательной деятельности. Цель настоящей статьи достигается путем проведения теоретического анализа существующих исследований в области теории и методики спорта, отражающих основные аспекты процесса развития координационных способностей, а также экспериментального исследования на базе ФГБОУ ВДЦ «Орленок» среди мальчиков 12–13 лет, занимающихся настольным теннисом и прибывающих на отдых в указанный центр. Обобщение полученных результатов исследования позволило определить практическую значимость поиска путей обеспечения непрерывной координационной подготовки юношей, занимающихся настольным теннисом, с использованием потенциала спортивно-массовой работы, реализуемой в условиях детских оздоровительных центров. С учетом выявленных возможностей обоснованы средства координационной подготовки мальчиков 12–13 лет, занимающихся настольным теннисом, обеспечивающие сохранение у них стабильного уровня развития координационных способностей в период их нахождения в указанных учрежденияхThe purpose of this article is to assess the possibilities of children’s health centers in organizing the coordination training of young athletes specializing in table tennis. The need to solve this problem lies on the importance of maintaining the required degree of coordination training of young athletes during their attendance outside the training process as a condition for ensuring the success of competitive activity. The article purpose is achieved by conducting a theoretical analysis of existing studies in the theory and methodology of sport reflecting the main aspects of the process of development of coordination abilities as well as of experimental study on the basis of the All-Russian Children’s Center “Orlyonok” among boys 12–13 years old specializing in table tennis who are on vacation in this center. The generalization of the obtained results of the study allows us to determine the practical importance of finding ways to ensure continuous coordination training of boys specializing in table tennis using the potential of mass sporting work, which is implemented in the conditions of children’s health centers. Taking into account the identified opportunities we substantiate the means of coordination training of 12–13 years old boys, ensuring the preservation of their stable degree of development of coordination abilities during their attendance in the abovementioned institution

Dislocation Filter Based on LT-GaAs Layers for Monolithic GaAs/Si Integration

The use of low-temperature (LT) GaAs layers as dislocation filters in GaAs/Si heterostructures (HSs) was investigated in this study. The effects of intermediate LT-GaAs layers and of the post-growth and cyclic in situ annealing on the structural properties of GaAs/LT-GaAs/GaAs/Si(001) HSs were studied. It was found that the introduction of LT-GaAs layers, in combination with post-growth cyclic annealing, reduced the threading dislocation density down to 5 × 106 cm−2, the root-mean-square roughness of the GaAs surface down to 1.1 nm, and the concentration of non-radiative recombination centers in the near-surface GaAs/Si regions down to the homoepitaxial GaAs level. Possible reasons for the improvement in the quality of near-surface GaAs layers are discussed. On the one hand, the presence of elastic deformations in the GaAs/LT-GaAs system led to dislocation line bending. On the other hand, gallium vacancies, formed in the LT-GaAs layers, diffused into the overlying GaAs layers and led to an increase in the dislocation glide rate. It was demonstrated that the GaAs/Si HSs obtained with these techniques are suitable for growing high-quality light-emitting HSs with self-assembled quantum dots