Role of informal sector recycling in waste management in developing countries

Many thousands of people in developing country cities depend on recycling materials from waste for their livelihoods. With the focus of the Millennium Development Goals on poverty reduction, and of waste strategies on improving recycling rates, one of the major challenges in solid waste management in developing countries is how best to work with this informal sector to improve their livelihoods, working conditions and efficiency in recycling.The general characteristics of informal recycling are reviewed, highlighting both positive and negative aspects. Despite the health and social problems associated with informal recycling, it provides significant economic benefits that need to be retained. Experience shows that it can be highly counterproductive to establish new formal waste recycling systems without taking into account informal systems that already exist. The preferred option is to integrate the informal sector into waste management planning, building on their practices and experience, while working to improve efficiency and the living and working conditions of those involved. Issues associated with integrating informal recycling into the formal waste management sector are discussed.     

试论19世纪60年代～70年代东疆地区封禁政策的危机--兼谈"移民实边"思想的产生

19世纪60年代～70年代东疆地区封禁政策的危机,主要表现在沙俄的军事侵略威胁、朝鲜流民问题的冲击、东北边疆防御力量的空前削弱三个方面。清廷为了摆脱这一危机而苦苦摸索,移民实边思想便是这一摸索的产物。     

设计素描的四种基本功

设计素描作为学习设计的一门基础课程,通过观察方法、思维方式、表现形式、立体观念和细节刻画四个方面的介绍说明设计素描对于学习产品设计的重要性.     

苏州市人口老龄化分析

基于对苏州市第四次人口普查人口年龄结构的分析,本文认为苏州市已进入人口老年型早期。文中论述了该市人口老龄化的现状、过程及趋势,剖析了过去与未来主导这一进程的不同的人口学因素,特别强调了控制人口增长对这一进程的作用。文中预测现在和今后的二十年内人口老龄化发展较缓,总抚养比较低,正届人口构成上的“黄金时期”,面临着实现经济跃升的契机。其后,人口老龄化将以空前的速度进行。抓住当前的契机也是今后从根本意义上解决好老龄人口问题所必需的。     

中药组合物发明的创造性问题研究

针对中药组合物发明的创造性判断问题以及中药组合物发明的创造性与中药药理之间的关系问题展开研究。如果中药组合物发明是中医药领域的技术人员在现有的中药处方的基础上,仅仅根据已知的中药药理进行合乎逻辑的分析、推理或者有限的试验就可以得到,且没有产生预料不到的技术效果,则该中药组合物发明不具备创造性;如果中药组合物的原料组成或者技术效果是不容易想到的,则该中药组合物发明具备创造性。在中药组合物发明的创造性与中药药理的关系问题上,具备创造性的发明必然符合中药药理,但符合中药药理的发明不一定具备创造性,而人们对中药药理的认识也是不断拓展和深化的。     

高Si/C高强度铸铁中C、Si、Si/C的作用及其选择

本文叙述了高Si/C高强度灰铸铁中碳、硅元素存在的形式及其对结晶过程的影响。试验表明,当碳当量一定时,随着Si/C的升高,初生奥氏体枝晶数量增多并且细化和强化,从而构成了强度的基础。该铸铁的强度模式应为“初生奥氏+共晶团”。本文对E型石墨存在的必然性和合理性也进行了讨论。     

上市公司治理因素与财务困境关系的实证研究

对中国上市公司治理因素与财务困境的关系进行了实证研究。以1998~2005年被ST(special treatm ent)的公司及其配对样本共计528家作为研究样本,通过使用二元Log istic回归分析方法,发现大股东持股比例、H-10股权集中指数、股权制衡度、国家股比例、最终控制人类型、独立董事持股比例以及审计意见与公司发生财务困境的可能性显著负相关,管理者代理成本显著提高了公司陷入财务困境的危险性。而高管持股比例、董事会规模以及CEO的双职合一对困境发生的概率无显著影响。     

The Effect of Occupational Sex Composition on the Gender Gap in Workplace Authority

This article compares women and men's attainment of workplace authority in female-dominated, mixed, and male-dominated occupations. It is based on a representative mobility study of Jewish women in the Israeli labor force conducted in 1991–1992. Two sets of hypotheses are offered based on two competing theories. The first theory predicts that in female occupations women have more influence and mutual support than in male occupations, and, hence, they will have more access to authority. The opposing perspective argues that in male-dominated occupations the competition between women and men is weaker, and therefore men have a smaller incentive to discriminate against women. Our findings support the second argument. The gender gap in authority is larger in female-dominated occupations, and women have the highest chances to have authority when they work in male occupations; men have similar chances, no matter in which type of occupation they are employed.     

引导大学生进行英语成功阅读的方法探索

为落实教育部颁布的《高校英语专业教学大纲》的要求,提高英语语言学习性阅读或语言应用性阅读的能力,就必须有效地引导学生成功阅读。要进行成功阅读,就要打好基础,坚持循序渐进、量的原则,要讲究阅读的方法;要在教学中特别注意研究语义单位关系,借以提高阅读的效率。