Heisenberg and ferromagnetism

Heisenberg’s contributions to the understanding of ferromagnetism are reviewed. The special features of ferromagnetism, vis-a-vis dia and para magnetism, are introduced and the necessity of a Weiss molecular field is explained. It is shown how Heisenberg identified the quantum mechanical exchange interaction, which first appeared in the context of chemical bonding, to be the essential agency, contributing to the co-operative ordering process in ferromagnetism.     

试论中国商业足球的美学魅力

在改革开放的大潮中,中国商业足球由于新闻媒体的宣扬,亿万球迷的忠诚,足球赛制的改革,足球健儿的拼搏,企业团体的赞助,正在展示着她无比诱人的美学魅力。     

竞技武术功能刍议

竞技武术近年来发展迅速。本文通过对相关文献资料的查阅,对竞技武术功能的积极方面和消极方面进行了分析。结果表明,竞技武术必须贯彻“以人为本”的理念才能持续健康地发展。