重金属铅的生态效应及其地球化学循环

随着工业化的快速发展,大量工业废弃物的无达标排放到环境中,造成了环境污染.其中重金属污染更是引起了人们的高度重视,很多学者对重金属的生态效应及地球化学循环进行了比较深入、系统的研究.本文仅以重金属铅为例,就近年来国内外学者对其的生态学效应、地化循环研究进行了综述,为以后进一步探讨铅污染问题提供有益的借鉴.     

Evaluating effects of atmospheric CO2 on stability of global climate: a cell-to-cell mapping approach

Atmospheric carbon dioxide concentration [CO2], incoming solar radiation and sea ice coverage are among the most important factors that control the global climate. By applying the simple cell-to-cell mapping technique to a simplified atmosphere-ocean-sea ice feedback climate model, effects of these factors on the stability of the climatic system are studied. The current climatic system is found to be stable but highly nonlinear. The resiliency of stability increases with [CO2] to a summit when [CO2] reaches 290 μL/L which is comparable to the pre-industrial level, suggesting carbon dioxide is essential to the stability of the global climate. With [CO2] rising further, the global climate stability decreases, the mean ocean temperature goes up and the sea ice coverage shrinks in the polar region. When the incoming solar radiation is intensified, the ice coverage gradually diminishes, but the mean ocean temperature remains relatively constant. Overall, our analysis suggests that at the current levels of three external factors the stability of global climate is highly resilient. However, there exists a possibility of extreme states of climate, such as a snow-ball earth and an ice-free earth.     

体育全球化的文化反思

体育全球化的实质是欧美化。奥林匹克是当今体育思想、组织制度、内容形式的集大成者，欧美中心主义表现得淋漓尽致．其特征是“输出”意识强烈、排他性、强化认同。欧美中心主义的体育全球化与人类的理想是相冲突的。在新的世纪，体育全球化是不可阻挡的潮流，但体育全球化必须以文化的差异为基点，充分认识世界体育发展主体的多元性。中西方体育文化的融合是体育发展的选择。     

我国体育用品制造业国际转移的趋势及动力机制——基于全球生产网络视角

我国体育用品制造业国际转移呈现出网络化、多元化、集群化、主动化的新趋势,其动力来源有三点,一是寻求我国体育用品制造业价值链的重构,二是试图跨越后发国家可能面临的价值链固化的"网络陷阱",三是追逐包括竞争优势和网络权力等隐形收益在内的综合利益最大化。但是,这种自觉行动和主动作为可能受到价值链上端发达国家的阻击。因此,我国体育用品制造业要利用研发设计和品牌营销价值链的发育突破门限效应,积极开展跨境并购和逆向投资活动弥补比较劣势,并逐步回归到研发本土化,利用国内中小体育用品企业构建由自己主导的价值链,以全球布局应对潜在的贸易风险。     

上海建设具有全球影响力的体育资源配置中心内涵研究

结合上海建设体育科技创新平台和国际一流赛事之都的时代背景,展开对上海建设具有全球影响力的体育资源配置中心的内涵研究。文章运用文献资料法、实地调研等定性与定量的研究方法,通过科学界定体育资源配置中心的内涵,构建上海建设具有全球影响力的体育资源配置中心的技术指标,分析上海体育资源配置的现状与存在的问题,探讨上海建设具有全球影响力的体育资源配置中心的契机,设计上海建设具有全球影响力的体育资源配置中心的步骤与目标,提出上海建设具有全球影响力的体育资源配置中心的政策建议与保障机制。     

Korean-Wave celebrities between global capital and regional nationalisms

This article examines conflicts over the transnationalization of South Korean celebrities in the wake of the Korean Wave (Hallyu) in the twenty-first century. I consider a number of celebrity controversies to argue that the demands placed upon Hallyu celebrities by domestic observers, foreign audiences, and global capital are fundamentally irreconcilable. South Korean nationalist appropriation of Hallyu, as well as the local celebrity culture, demand that Hallyu stars firstly be exemplary Korean patriots, whereas international audiences expect sympathy for their own causes. Local nationalist agendas have proven particularly troublesome because of postcolonial sensibilities and ongoing territorial disagreements between South Korea and its neighbors. Finally, as circulating commodities and commercial assets, Hallyu stars are also pledged to global capital. Their value is highest when they appeal to as broad an audience as possible and alienate no one with their politics. An apolitical neutrality on regionally controversial issues, however, is an untenable position when antagonistic geopolitical interests are concerned and nationalist passions flare. I situate this argument within critical scholarship on cultural globalization flows within Asia, while engaging celebrity studies to frame Hallyu stars as transnational commodities.     

“Stop sending your kids across our border:” Discursively constructing the unaccompanied youth migrant

The recent migration of 65,000 children across the southwestern border, coupled with allegations of abuse by the U.S. Border Patrol, enables the investigation of an overlooked immigrant category: the unaccompanied youth migrant. Analyzing audience responses to news reports of the abuse, we find that established disparaging immigrant tropes apply, describing the children as an economic burden, disease carriers, and offspring of irresponsible families. We uncover two new themes: Youth migrants are channels whereby criminals may infiltrate the U.S., and manipulate legal authorities to remain in the U.S. Finally, we demonstrate how global compassion is strategically deployed to qualify harsh retaliatory measures.     

课堂提问与学生创造性思维能力的培养

科学设计课堂提问能激发和培养学生的创造性思维。本文就课堂提问的科学设计等问题进行了分析。     

世界银行治理结构改革与中国的应对策略?

世界银行在全球经济治理中发挥着重要作用,但随着新兴经济体的崛起和近年来金融危机、债务危机频发,世界银行治理结构所存在的制度性缺陷显露无遗,相应改革势在必行。但是,由于世界银行具有公共组织与股份公司的双重属性,使得改革方向出现分歧,改革进程推进缓慢。从根本上说,世界银行改革中发达国家与发展中国家并不存在不可调和的利益冲突,在减贫等问题上双方存在着合作的基础。中国应积极推进世界银行治理结构改革：首先,必须明确“负责任、有作为的大国”定位,表现出推动改革的积极态度;其次,要紧密围绕“发展”主题,注重长远利益;再次,要加强对世界银行人事安排的参与;最后,要积极构建世界银行框架下发展中国家沟通与合作的正式协调机制。     

从教育研究视角检讨“越是民族的就越是世界的”

“越是民族的就越是世界的”这一命题的关键词不是无条件的。如果从一般教育、教育研究和教育研究现代化三个视角对该命题成立的条件进行检讨,则只有代表、反映或暗合了人类教育和教育研究及其发展的方向,越是民族的教育、教育研究和教育研究现代化中的“精华”,才越可能是“世界的”,反之则不可能成为“世界的”。