物理学与未来

物理学在最近10年取得了重大进展,其中许多进展是开发和应用昂贵的大型研究装置的结果。合作是其进一步发展的关键,而国际组织起着特殊作用,因它们可以确保整个物理学界通过合作项目和人员培训在发达国家和发展中国家参与合作。     

解读中国的专利司法保护

中国几乎所有的高层官员都有工科教育背景。用英特尔公司前任首席执行官贝瑞特的话说：“他们懂行”，他们明白科技发展与生产制造、大学教育及基础设施“生态系统”之间的联系。     

身体活动的心理健康效应:效果与机制——发展的视角

身体活动在个体发展各阶段具有广泛的心理健康效应。已有研究提示,有氧练习与抗阻练习对儿童、青少年的P3与工作记忆等认知表现具有积极影响,并且对学业成就测试有潜在积极效益。身体活动还对成年群体的执行功能及抑郁表现具有中等程度的改善效应,并且对罹患阿尔茨海默症及多发性硬化症老年群体的认知功能具有积极临床效果。身体活动心理效益的生物学机制主要体现在血液灌注水平提升、突触发生及脑源性营养因子的表达。未来研究中,应当丰富随机对照与纵向性质研究,身体活动与其它因素对脑功能影响的交互作用机制需要进一步了解。     

One to Watch

前段时间,中国市场上燃起了电视大战的硝烟,数码电视也出现在众多商场之中。本文介绍最新型的数码电视—等离子电视机。这种电视机有着显著的优点,不过就目前而言,市场状况似乎不很乐观。这是为什么呢?     

流星

我看一颗星急速地滑下天空, 它滑下时黑暗了北方的苍穹, 由于炽热和飞逝而无法拥有, 由于美好而不能轻易获得与付出, 仅仅只想到生成良好的祝福, 紧接着就消失得无影无踪。     

"Protoplasm...is soft wax in our hands": Paul Kammerer and the art of biological transformation

Paul Kammerer's career ended in scandal in 1926 over tampering with his evidence for "Lamarckian" evolution--the infamous midwife toad. But although Kammerer's conclusions proved false, his evidence was probably genuine. In any case his arguments were not simply for Lamarckism and against Darwinism, as the theories are understood today. If we look beyond the scandal, the Kammerer story shows us a great deal about early 20th-century biology: the range of new ideas about heredity and variation, competing theories of biological and cultural evolution and their applications in eugenics, new kinds of laboratories and professional roles for biologists, and changing standards for documenting experimental results.     

Designing nature reserves: adapting ecology to real-world problems

Establishing nature reserves is the foundation of regional conservation strategies. The science of nature reserve design is relatively new, having emerged alongside the interdisciplinary field of conservation biology over the past three or four decades. Its goal is to apply scientific ideas and methods to the selection and design of nature reserves and to related problems, such as deciding what kinds of buffer zones should surround reserves or how to establish corridors to link reserves and allow organisms to move from one area to another. As in other areas of conservation biology, designing nature reserves is a 'crisis' science, whose practitioners are driven by an acute sense of urgency over the need to stem the loss of species caused by human population growth.