A Comparative Study on the Influencing Factors of Sports Participation between Male and Female College Students

The sports participation of college students is affected by many factors. Due to the physical and psychological differences between male and female college students, the factors affecting college students’ sports participation also show gender differences. An online questionnaire was distributed to students in four sports classes to investigate the influencing factors of male and female college students’ participation in sports. A total of 100 valid questionnaires were received, including 36 male college students and 64 female college students. T-test was used for analysis. The results showed that two of the 29 in investigated factors showed significant differences between men and women (p<0.05 and p<0.01). Conclusion: Male college students’ sports participation is more likely to be affected by their lovers. Male college students practice sports skills to win sports competitions stronger than female college students

SAM-dependent enzyme-catalysed pericyclic reactions in natural product biosynthesis.

Pericyclic reactions-which proceed in a concerted fashion through a cyclic transition state-are among the most powerful synthetic transformations used to make multiple regioselective and stereoselective carbon-carbon bonds. They have been widely applied to the synthesis of biologically active complex natural products containing contiguous stereogenic carbon centres. Despite the prominence of pericyclic reactions in total synthesis, only three naturally existing enzymatic examples (the intramolecular Diels-Alder reaction, and the Cope and the Claisen rearrangements) have been characterized. Here we report a versatile S-adenosyl-l-methionine (SAM)-dependent enzyme, LepI, that can catalyse stereoselective dehydration followed by three pericyclic transformations: intramolecular Diels-Alder and hetero-Diels-Alder reactions via a single ambimodal transition state, and a retro-Claisen rearrangement. Together, these transformations lead to the formation of the dihydropyran core of the fungal natural product, leporin. Combined in vitro enzymatic characterization and computational studies provide insight into how LepI regulates these bifurcating biosynthetic reaction pathways by using SAM as the cofactor. These pathways converge to the desired biosynthetic end product via the (SAM-dependent) retro-Claisen rearrangement catalysed by LepI. We expect that more pericyclic biosynthetic enzymatic transformations remain to be discovered in naturally occurring enzyme 'toolboxes'. The new role of the versatile cofactor SAM is likely to be found in other examples of enzyme catalysis

Asymmetrically interacting spreading dynamics on complex layered networks

The spread of disease through a physical-contact network and the spread of information about the disease on a communication network are two intimately related dynamical processes. We investigate the asymmetrical interplay between the two types of spreading dynamics, each occurring on its own layer, by focusing on the two fundamental quantities underlying any spreading process: epidemic threshold and the final infection ratio. We find that an epidemic outbreak on the contact layer can induce an outbreak on the communication layer, and information spreading can effectively raise the epidemic threshold. When structural correlation exists between the two layers, the information threshold remains unchanged but the epidemic threshold can be enhanced, making the contact layer more resilient to epidemic outbreak. We develop a physical theory to understand the intricate interplay between the two types of spreading dynamics.Comment: 29 pages, 14 figure

The Shortcomings and Improvement Strategies of Public Physical Education Courses in Chinese Universities

With the development of China’s higher education, China’s university education has developed rapidly and the number of students enrolled has been increasing. At present, the number of college students in China has exceeded 24 million, showing a prosperous scene. However, with the rapid development of college education, the participation rate of college students in sports is generally low, and the college physical education courses set up to promote college students’ sports have not played their due role. This study analyzes the shortcomings of current college physical education and proposes that college physical education in China should change the current situation of outdated teaching concepts, unreasonable teaching evaluation system, insufficient teaching content, and cultivate college students’ interest in sports and lifelong sports

Game and Intrinsic Motivation: Basketball Teaching for Pupil

The cultivation of pupils’ sports interests is related to the formation of pupils’ sports habits and their physical health in the future. At present, the physical condition of primary and secondary school students in China is not optimistic. Basketball, as a part of school sports, is widely carried out in schools in China. Scientific organization of basketball teaching in primary schools can better improve the physical quality of pupils and cultivate their interest in basketball. Pupils are still in the stage of physical and mental development, and their bones, muscles and nervous system are not well developed, their attention is easy to be distracted, and they can not carry out large amount of exercise, so they should focus on motivational exercise and basic teaching. As a means of teaching, games can improve pupils’ interest in the practice and stimulate their intrinsic motivation to participate in basketball, which should be appropriately increased in teaching

Confucian Sports Thought: Combining Sports with Education

Since the reform and opening up, China has developed rapidly, and people’s ideas, ethics, and values have been constantly changing. Because of the changes in the morals and values of students’ parents, it has also brought a significant impact on education. They only focus on student’s academic achievements, and students’ physical quality and moral education are ignored. How should school education do? China’s Confucianism may inspire us. Confucianism attaches importance to moral, intellectual, and physical education, and emphasizes the all-round development of human character, intelligence, and body. Confucianism integrates ethical code into physical activities and achieves the purpose of education. Confucianism inspires us that school physical education should not only focus on improving students’ physical quality but also pay attention to its educational function

A Descriptive Model of Robot Team and the Dynamic Evolution of Robot Team Cooperation

At present, the research on robot team cooperation is still in qualitative analysis phase and lacks the description model that can quantitatively describe the dynamical evolution of team cooperative relationships with constantly changeable task demand in Multi-robot field. First this paper whole and static describes organization model HWROM of robot team, then uses Markov course and Bayesian theorem for reference, dynamical describes the team cooperative relationships building. Finally from cooperative entity layer, ability layer and relative layer we research team formation and cooperative mechanism, and discuss how to optimize relative action sets during the evolution. The dynamic evolution model of robot team and cooperative relationships between robot teams proposed and described in this paper can not only generalize the robot team as a whole, but also depict the dynamic evolving process quantitatively. Users can also make the prediction of the cooperative relationship and the action of the robot team encountering new demands based on this model. Journal web page & a lot of robotic related papers www.ars-journal.co