For an improved rural housing to limit distress migration

Third World cities have been suffering from many problems notably slums, squatter housing, unemployment and so on. The aim of this study is to discuss the process and means of transforming rural life so as to create better opportunities and enhance the living conditions in the countryside. It is suggested that this approach would retain a substantial part of the rural population in the rural areas, thus avoiding the urban problems and chaotic unplanned development.     

Female house martins (Delichon urbica) reduce egg androgen deposition in response to a challenge of their immune system

Female birds deposit in the yolks of eggs substantial amounts of androgens, such as testosterone and androstenedione. These androgens have been shown to speed up nestling development, induce a fast development of ornaments and increase dominance in adults. Experiments in several species have reported that females invest greater amounts of androgens in the eggs fathered by attractive males, suggesting that yolk androgen is a costly investment for either the offspring or the mother. There is some evidence that nestling immunocompetence may be partially suppressed by high levels of yolk androgens, but it is not known whether this is also the case for females. We tested this hypothesis in the house martin by inducing an immune challenge through an injection of sheep red blood cells, a standard challenge of the humoral immune system. Experimental birds laid eggs with lower amounts of yolk androstenedione than controls, and there was a similar non-significant trend for testosterone. Furthermore, the probability of laying a replacement clutch was higher for birds that had laid a first clutch with relatively high levels of yolk testosterone. These results suggest that yolk androgen deposition is limited by immune costs in the female, and that only females in good condition may afford to invest high levels of androgen in eggs in this species.     

水资源立法浅探

水资源是基础性的自然资源和战略性的经济资源。因此,世界上不少国家和国际组织采用法律手段对水资源实施保护和管理。随着经济和社会的不断发展,合理开发利用水资源,特别是依法保护和管理水资源已经成为我国可持续发展中的一个重大课题。鉴于我国新水法的颁布与实施,结合我国水资源管理现状,进一步研究建立水资源的物权法律体系,从而在水资源领域以水权为价值取向,健全和完善水资源保护的法律制度,以实现我国水资源开发利用的法律调整之目的。     

Optimal design for water conservation and energy savings using green roofs in a green building under mixed uncertainties

Most water conservation and energy saving strategies for residential homes and commercial buildings have higher initial capital investment than traditional ones. Yet, the added benefits of these “green” building strategies should outweigh the increase of initial capital cost at the end of the house lifetime. Using green roof systems to cool houses gives rise to uncertainties from local precipitation patterns and the unstable market related costs and benefits. The optimal area of green roof to balance cost, benefit, and risk remains unknown. To achieve such a complex systems analysis, a grey stochastic programming model was prepared to address the optimal design strategies under mixed uncertainties. Such a cost-benefit-risk trade-off model was formulated for this study through an optimization framework to retrieve the optimal design strategies with respect to a typical Florida residential home (shingle and metal roofs). It is particularly designed to synergistically integrate a green roof with beneficial reuse of gray water and stormwater while achieving some degree of energy savings. The study identifies the optimal green roof area that keeps within the cost of a conventional home over a specific life time, such as 50 years. Research findings show that as the reliability level associated with the chance constraint was decreased, the upper bound of the green roof area did not vary much for either shingle or metal roofs. The lower bound was found to decrease in the same situation, however, due to the higher minimum cost of the cistern in relation to the greater volume of expected rainfall, forcing the required green roof area to decrease.     

House sparrows benefit from the conservation of white storks

As with many farmland bird species, the house sparrow Passer domesticus is declining in Europe, mainly due to intensification of agriculture reducing nest sites and food supplies. During 2002–2005, we studied the population size and nest site characteristics of house sparrows breeding within white stork Ciconia ciconia nests in a large area of agricultural landscape within western Poland. To explain sparrow density within stork nests, we examined characteristics of white stork nests (position, age, productivity) and the farm type around the nest. House sparrow density was greatest in the longest established (and hence larger) white stork nests located on traditionally managed farms. Two recent changes appear to have adverse effects on house sparrows. The first is the intensification of farming and the second is active management of white stork nests on electric poles to reduce nest size and thus avoid both disruption to the electrical supply and electrocution of white storks. Because the white stork has such a high profile in Poland, there are numerous schemes to conserve and enhance this species. In conclusion, we clearly show that protecting one species can have valuable, although unplanned, benefits to another species of conservation interest, the house sparrow.     

Geographic patterns of non-carpeted floor dust loading in Syracuse, New York (USA) homes

Residential floor dust loading was measured on the smooth floor surface of 488 houses in Syracuse, New York, during the summers of 2003 and 2004. Using U.S. Environmental Protection Agency (EPA) wipe methods, pre-weighed Ghost Wipes, Lead Wipes, or Whatman Filters were employed to collect duplicate samples from (predominantly) kitchens. The collection efficiency of the various media was determined from multiple wipe tests and side-by-side comparisons. The results were normalized and aggregated at the census tract level to determine whether spatial patterns of dust loading could be observed. Loading was found to be log-normally distributed, with a geometric mean value of 0.311 g m⁻² (29 mg of dust per square foot of floor); 95% of the observations fell in the range of 0.042–2.330 g m⁻² (4–216 mg foot⁻²). The sampling for floor dust loading shows some bias for day of the week in which visits to the residential properties were made. After a first-order correction for this effect, results were aggregated by census tract and mapped in a geographic information system (GIS); strong spatial patterns can be identified in an inverse distance weighted mapping. The geographic patterns exhibit a strong correlation with socio-economic/demographic covariates extracted from the 2000 census summaries. Dust mass on the floors is positively correlated with renter-occupied properties and family size; it is negatively correlated with measures of household income.     

城市污水处理厂特许权经营下的质量管制研究

首先探讨了特许权经营后政府对城市污水处理厂实行质量管制的必要性;然后,针对当前对污水处理服务进行质量管制存在的普遍问题,通过分析政府管制机构与污水处理厂基于质量的博弈行为,提出了对城市污水处理厂实行有效质量管制的几点建议。     

Extractivism and the rights of nature: governmentality, ‘convenient communities’ and epistemic pacts in Ecuador

Ecuador’s recently adopted conflict resolution techniques have aggravated the always tense encounters between Amazonian indigenous communities, oil companies and the state. The state’s governmentality project portrays these socio-environmental conflicts as mere technical–managerial issues while societal coalitions re-politicize them through territorial defense struggles. The Cofán Dureno case highlights how the self-proclaimed ‘Citizen’s Revolution’ government seeks to redefine socio-natural relationships and territorial identities, devising ‘communities of convenience’. These correspond to the state’s own images, political structure and ideology, promoting ‘community participation’ to facilitate oil extraction. Ecuador’s constitutionally recognized Rights of Nature (paradoxically installed by the same government) are analyzed with a focus on their potential for resisting socio-environmental injustice. The internationally celebrated inclusion of these rights in the Constitution was advocated by nonindigenous intellectual activists but influenced and supported by the indigenous movement. Beyond legal implications, these rights might foster an epistemic pact between indigenous and nonindigenous society to defend territories from extractive industries.     

论“出兑“及其法律适用

在法律对出兑没有规定的情况下,法院对出兑案例的判决中,应作深入全面的认识和理解,给予当事人正确的法律支持.     

铁路客车空调节能改造与合同能源管理

合同能源管理作为一种节能新机制,不同于传统的节能新技术和产品销售模式,其灵活多样的合作方式为节能改造项目提供了广阔的应用前景。针对如何在铁路局集团公司实施普速客车空调节能改造合同能源管理项目进行探讨,提出了实施的原则、方法,以期对铁路系统展开项目合同能源管理有借鉴意义。