“乡下人进城”文学叙事的政治伦理遮蔽与还原--以《我们夫妇之间》、《霓虹灯下的哨兵》为中心

萧也牧的《我们夫妇之间》和沈西蒙、漠雁、吕兴臣编剧的九场话剧《霓虹灯下的哨兵》是较早的“乡下人进城”作品.《我》的饱受争议与《霓》剧的名噪一时形成了鲜明的反差,这源于二者对城乡日常生活方式差异的不同想象.经由这一文学现象的考察,可见当代城乡差异叙事逐渐剥离阶级、国家意识的遮蔽与替代转向不同身份的生命的“生”的个体差异.“差异”的历史衍义折射了国家、阶级、民族宏大叙事的祛魅以及对生命本体差异现状的正视与回归.透视“差异”衍义的审美经验背后的政治,可知进城的乡下人在创造生活的同时也在创造一种历史.     

Relationship between urbanization and bat community structure in national parks of the southeastern U.S.

Urbanization and development are predicted to increase considerably in the United States over the next several decades, and this is expected to result in large-scale habitat loss, fragmentation and loss of wildlife species. Thus, natural parks and preserves are becomingly increasingly important in the conservation of regional biodiversity. We used mist-nets and AnabatII acoustic detectors to survey bats in 10 national parks in the southeastern U.S. and examined the relationship between bat community structure and development in the surrounding 5 km. We predicted that species richness would increase with park size and that species richness and evenness would decrease with development. Species richness was not related to development or any other landscape characteristics including park size. In contrast, species evenness declined with increasing development. Percent Developed land in the surrounding 5 km area was the only variable that entered into the stepwise regression model. The decrease in species evenness in the urban parks was due to the dominance of big brown bats (Eptesicus fuscus) in these parks. The percentage of big brown bats in our captures was positively related to percent Developed land in the surrounding area. Our data suggest that urban parks may be important for conserving regional bat biodiversity. However, the low species evenness in these parks suggests that some bat species may be susceptible to the effects of urbanization and may be extirpated over time. Thus, management of urban as well as rural parks should strive to conserve as much bat roosting and foraging habitat as possible.     

论北京“城中村”改造——兼述流动人口聚居区合作治理

2009年以来北京开始进行大规模的城中村改造。这场由政府主导的乡村社会变革,对城乡结合部流动人口聚居区产生了重要影响。本文在概括北京城中村改造模式的基础上,对城中村改造的作用给予了积极评价,同时指出城中村改造周边地区可能面临更深的发展困境,应通过合作治理寻求解决城乡结合部流动人口聚居区社会问题的治理之道。目前北京已经具备了实现流动人口聚居区合作治理的基本条件,可以在市区政府是主导、乡村组织是枢纽、社区成员是核心、社会团体和社会单位(企业)是支撑、专业NGO是助推器的合作治理框架下,以生活设施改造和社会管理体制创新为突破口,统筹兼顾尚待城市化地区的协调发展。     

Ecological research can augment restoration practice in urban areas degraded by invasive species—examples from Chicago Wilderness

Urban biodiversity conservation needs a firm scientific foundation, one that draws upon active and regionally calibrated research programs. Until recently this foundation has not existed. In this paper we examine the way in which the emerging discipline of restoration ecology in an urban context can learn from the experiences of ongoing restoration projects and in turn how novel insights from research of urban soils can help these projects define and reach their goals. Limitations on collaboration between academic researchers and practitioners continues be problematic. We discuss a model whereby this impediment may be removed. A case study of Rhamnus cathartica, an invader of Midwestern woodlands which modifies some important soil ecosystem properties will be used to illustrate the potential for engagement between research and practice.     

‘A city is not a company,a flat is not a commodity’: urban movements and defenders of tenants’ rights in Poland

This article describes urban and tenant movements that have been created in Poland in response to the commercialization of urban space and the complete commodification of the right to housing. On the one hand, spatial segregation in Polish cities was fully approved by the state; on the other hand, it became a source of income for new owners of acquired buildings, who often used criminal methods to intimidate tenants. Brutal evictions encountered social resistance from the emerging tenant movement, non-institutionalized left-wing communities and endangered tenants, who were often pensioners and members of the lower classes. The author mentions undertaken and possible methods of social self-defence such as eviction blockades and rent strikes. He also raises the question of whether urban movements can become part of a broader social movement for systemic change.     

Influence of urban landscape structure on bird fauna: a case study across seasons in the city of Valencia (Spain)

Studies on bird fauna of urban environments have had a long history, but the potential of studies mapping the distribution of birds in cities probably has not fully developed. The bird fauna of the municipality of Valencia (Spain) was studied to determine the influence of urbanization on bird species richness and abundance. Birds were censused during winter and the breeding season of years 1997–1998 in 197 squares measuring 49 ha each from a rural and an urbanized area. Across seasons the number of species decreased around 40% in the city compared with the rural landscape surrounding it. Such pattern could be attributed to the low number of farmland species capable to use the habitats inside the city, and the limited ability of urban parks in attracting woodland species. In the urban landscape, the influence of the dimensions and spatial arrangement of habitat patches was outweighed by the amount of each habitat per square. Bird richness and the abundance of most species were negatively related with the amount of built-up habitat per square and positively with the amount of urban parks, and of habitat diversity. Conversely, bird fauna was largely independent of mean park size per square especially during winter, indicating that at the landscape scale even small patches of habitat could play an ecological role. Conservation of urban bird diversity could benefit of two complementary strategies: (i) the protection of the surrounding rural landscape from urban development; (ii) habitat enhancement within the city. Particularly, a proper design and habitat management of urban parks could improve their suitability for urban bird fauna.     

理性习惯偏好与居民消费行为

 经济体制改革以来，随着经济的持续快速增长中国城镇居民已经习惯于生活水平不断提高。在这样的环境中，如果一个家庭当年消费的数量和上一年相同，其幸福感就会打折扣；另一方面，消费还具有外部性，如果与他人相比自己的消费水平降低了，消费者的效用也会受到损失。因此，理性消费者的决策目标是保持消费长期稳定增长而不仅仅是消费在各个时期的均匀分配。利用1978-2008年中国26个省（直辖市）的城镇住户调查数据得到的实证分析结果显示：消费者的习惯偏好与制度环境有关。受传统计划体制影响，1990前中国城镇居民的习惯偏好具有明显的“短视”特征。1990-2008年的估计结果则支持了理性习惯形成假设。即内部习惯形成导致了边际消费倾向明显下降，并且消费攀比是理性的。     

城市迁移人口及管理问题探讨

改革开放以来中国城市人口增长的最主要来源是人口的迁移增长 ,因此城市人口管理体制的重要一环是城市人口迁移的管理。本文根据城市人口迁移管理体制及其相关的问题进行分析 ,提出了要科学地依据自然资源与社会资源测定城市的人口承载力 ,对人口迁移增长的控制有科学的根据 ,对人口迁移增长有目标、有规划 ,并对城市人口迁移进行科学管理的创见     

中国城市商业银行的资产重组模式选择——以徽商银行为例

我国城市商业银行正处在一个生存与发展的关键阶段,资产重组是我国城市商业银行改革的核心内容,也是寻找外部开放与内部改革之间平衡点的关键。从徽商银行的特殊性出发,对我国城市商业银行进行现状分析,提出我国城市银行走出困境的方案——资产重组。以徽商银行成功资产重组为案例,分析其过程,从而为其他城市商业银行资产重组模式的正确选择提供借鉴作用。     

Case study for evaluating campus sustainability: nitrogen balance for the University of Minnesota

American ecologists recently began to address the ecology of cities. Concurrently, higher education institutions have developed sustainability education programs and instituted sustainability policies and projects. This paper draws together these two disparate areas by examining the nitrogen (N) budget of the Twin Cities campus of the University of Minnesota. We addressed the question: what were the annual inputs, outputs and internal cycles of N on the University of Minnesota Twin Cities campus? We found that 508 Mg N yr-1 were brought into the campus and 494 Mg N yr-1 were emitted from the University of Minnesota campus. The largest N inputs were abiotic fixation (conversion of N₂ to NO_x by combustion) and food for humans and animals. The largest N output was NO_x, followed by wastewater. Our results expand the understanding of the ecology of institutions within an urban area and provide an opportunity for improving urban ecology education and environmental policy at educational institutions.