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1.
Urban Ecosystems - Residential landscaping decisions can have important implications for water use and conservation in urban areas. Yard preferences are generally closely related to actual yard...  相似文献   

2.
The literature on preferences for redistribution has paid little attention to the effect of social mobility on the demand for redistribution and no systematic test of the hypotheses connecting social mobility and preferences for redistribution has yet been done to date. We use the diagonal reference model to estimate the effect of origin and destination classes on preferences for redistribution in a large sample of European countries using data from the European Social Survey. Our findings are consistent with the logic of acculturation in the sense that newcomers tend to adapt their views to those of the destination class at early stages and that upward and downward mobility do not have distinctive effects on the formation of political preferences. However, even though social origins seem to have a limited impact on preferences for redistribution, the evidence does not support the hypothesis that mobile and non‐mobile individuals are alike. We also find that the effect of social origin on preferences varies largely across countries. The empirical evidence leads to the conclusion that the effect of social origin on preferences for redistribution increases in contexts of strong familism.  相似文献   

3.
Urban Ecosystems - Designed ecosystems (e.g., gardens or engineered ponds) are increasingly common components of urban landscapes and contribute valuable ecosystem services. However, management of...  相似文献   

4.
Urban Ecosystems - Green cover and air quality are important components of life quality and human ecology in arid lands. In the Sonoran Desert of Mexico, Hermosillo is the largest city with a...  相似文献   

5.
Woody plant productivity and water use were evaluated under various management regimes in the Central Arizona Phoenix Long Term Ecological Research study area during 1999–2003. Management was defined as alteration of plant density, irrigation of plants, and removal of plant biomass via pruning. In a ground survey of 204 randomly chosen sites woody plant canopy area (CA) was higher in developed plots than in desert plots. Highest CA was measured in single family residential (SFR) sites but did not differ from most other developed site types. In experimental plots modeled after local SFR sites whole plot above ground biomass production (PP) and leaf area (LA) were higher and water use efficiency (WUE) was lower under high irrigation rate relative to low irrigation rate. Shrub pruning affected whole plot LA but not PP or WUE. Plant gas exchange data were used in conjunction with a trapezoidal integration model to predict maximum plant carbon uptake for plants in desert sites or under various irrigation regimes. These data might be used to facilitate long term monitoring of plant productivity and water use in the study area and to establish sound management practices in urban and suburban environments.  相似文献   

6.
Contemporary international models of governance prescribe the devolution of service provision to a range of non-state actors and the adoption of market-oriented policies. This paper explores the politics that have arisen from changes in the governance framework in Kampala, the capital of Uganda. The focus is on the privatisation of the management of city markets and on the relations between the multiple actors involved—private contractors, vendors’ associations, cooperatives and state actors. In particular, the paper looks into the implications of the privatisation process for vendors and their associations. It argues that, while the latter have sometimes adjusted to the changes by turning into cooperative societies or creating their own management firms, increasingly, however, private interests external to the markets are taking over the management functions, sidelining or even repressing, vendors’ associations. The general picture is one of weakening associations and endangered possibilities for broad-based organising and interest representation.  相似文献   

7.
Projection of elderly housing demands and needs has always been complex because of the volatility and heterogeneity of the factors involved. This paper argues that in a society where the tradition of elderly parents co-habiting with the children's family is breaking up, the projection of elderly housing demands for planning and policy purposes may not be scientifically possible. This owes to the impossibility to gauge housing affordability of the elderly by conventional indicators and the lack of information on the market behaviour of the elderly alone. This paper suggests the analysis of pre-retirement income, housing arrangements and housing aspiration to help elderly housing service providers to make more informed decisions. However, the projection of housing needs is more plausible if the underlying demographic projection models take care of major demographic trends such as household sizes and types, and if surveys are carried out to gauge housing aspirations of contemporary elderly persons. By using the above methods, the paper projected the future elderly housing needs and demands of Hong Kong, and found that public rental housing was perceived as the most secure type of housing regardless of affordability. This preference may reflect anomalies in elderly policies, particularly the lack of housing choices to suit the varied needs and affordability.  相似文献   

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王海乾 《城市》2002,(4):23-26
河北省环京津区域环绕京津,地理位置十分重要,坝上地区、燕山、太行山是大北京地区水源的主要发源地,是京津及华北平原的主要生态屏障。但由于历史的原因,造成大面积的林地、荒坡地、草地被开垦,出现了土地沙漠化、水土流失、地表水污染等生态问题。随着经济发展,粗放的经济增长方式又进一步加剧了生态环境恶化和上下游地区资源环境的矛盾,对下游地区人民生活和首都的安全构成威胁。这是京津生态环境的心腹之患,同时也严重制约着当地经济发展和人民生活改善的进程。为从根本上改善京津两市生态环境,强化冀北地区的生态屏障和水源保…  相似文献   

10.
Abstract

The place of Indians/Asians in Kenya's national history remains on the margins. The postcolonial Kenyan nation-state has been reluctant to acknowledge the role that Kenyans of Indian/Asian origin played and continue to play in the evolution of modern Kenya. Makhan Singh is one such Kenyan of Indian origin whose place in the Kenyan historiography has remained uncelebrated. This article offers a preliminary meta-critique of Zarina Patel's Unquiet: the Life and Times of Makhan Singh. It notes that this biography is a significant intervention in the treatment of the ‘Indian question’ in contemporary Kenya.  相似文献   

11.
This paper explores the tensions between civility and sectarianism in contemporary Belfast. Drawing on interviews with mothers engaged in raising young children in the largely working‐class and divided inner city, the paper offers a situated account of the dynamics of social reproduction and change. This is pursued through an analysis of the interplay between expectations of civility and sectarianism in three situations: walking, shopping and playing. The tensions and dilemmas of maternal action as the divided inner city is navigated indicate the gendered character of civility, an important emerging norm facilitating social change in the post‐conflict era. The situation of motherhood itself, both at the centre of ethno‐national reproduction and at the interface of public and private life, is not insignificant in routinely drawing mothers into the everyday dynamics of post‐conflict continuity and change.  相似文献   

12.
The Coalition for a Healthier Community (CHC) initiative was implemented to improve the health and well-being of women and girls. Underpinning CHC is a gender-based focus that uses a network of community partners working collaboratively to generate relevant behavior change and improved health outcomes. Ten programs are trying to determine whether gender-focused system approaches are cost-effective ways to address health disparities in women and girls. Programs implemented through coalitions made up of academic institutions, public health departments, community-based organizations, and local, regional, and national organizations, are addressing health issues such as domestic violence, cardiovascular disease prevention, physical activity, and healthy eating. Although these programs are ongoing, they have made significant progress. Key factors contributing to their early success include a comprehensive needs assessment, robust coalitions, the diversity of populations targeted, programs based on findings of the needs assessments, evaluations taking into consideration the effect of gender, and strong academic–community partnerships. A noteworthy impact of these programs has been their ability to shape and impact public, social, and health policies at the state and local levels. However, there have been challenges associated with the implementation of such a complex program. Lessons learned are discussed in this paper.  相似文献   

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Cities are dynamic economic and social structures that play a dominant role in both national and international economies. They are centers of population, production, consumption, and development. Cities utilize all advantages of economy of scale, proximity, and concentration. On the other hand, they produce high environmental pressures and diminish thereby the quality of life for urban residents. Indicators (environmental, economic, and governance and management) are seen as a tool that would help policy-makers in formulating urban policy that would lead cities towards sustainability and provide assistance for monitoring their development and municipal performance. The aim of this paper is to consider the role that urban indicators can play in city management. We present basic features of urban indicators that will determine their usefulness in urban management. This paper provides the framework to include environmental and economic indicators, as well as governance and management indicators, in successful urban management.  相似文献   

16.
What debates and issues are involved in moves to generalise about social work across the globe? This paper attempts to examine some of these major debates and, in so doing, to suggest some directions for a flexible approach. Crucial to these debates are several tensions around the issues of Westernisation, localisation and indigenisation in social work. It is also important to seek clarity around the complexities of international social work. The political implications involved in these movements are discussed and possible approaches to finding a flexible framework which allows for differences yet provides for accountability, responsiveness and connectivity are suggested.  相似文献   

17.
Vegetation type alters surface hydrology and nitrogen (N) cycling by partitioning evapotranspiration (ET) and drainage, but has not been fully utilized for this purpose in the design of urban rain gardens. Replicated treatments of three vegetation types (prairie, shrub, and turfgrass) commonly planted in rain gardens, as well as bare soil (control), were evaluated 1 year after establishment in 12, free-drainage bioretention cells designed to specifications for residential rain gardens in the Midwestern United States. Water and N budgets were calculated to assess differences in ET, drainage, soil moisture, and N transport following three stormwater applications in July, August, and October of 2006. Evaporative demand was also estimated as potential or reference ET during the study period using Hamon, Priestley-Taylor, and FAO Penman-Monteith models. Results show that after 1 year of establishment, vegetation type changed the water budgets of rain gardens thus altering their provisioning of ecosystem services via observed tradeoffs between daytime evaporative cooling (ET), stormwater storage, N-load reduction, soil and plant N retention, and groundwater recharge (drainage). Vegetation effects on hydrology and N transport were most significant when evaporative demand was high during the middle of the growing season. Observed changes in ET, drainage, soil moisture, and N transport support the incorporation of different vegetation types into conceptual and numerical models of rain gardens to assess ecological outcomes and tradeoffs at a variety of spatiotemporal scales.  相似文献   

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19.
Anurans are excellent site-specific bioindicators. Although urbanization imposes diverse threats to wildlife species, little is known about its effect on tropical anurans. In this study we assessed the response of anurans to different conditions within an urban area (i.e. highly developed intra-urban residential areas, highly developed peri-urban residential areas, intra-urban abandoned lots, waterway). Our results show that: (1) 36 % of the regional anuran species pool was found within the boundaries of the studied city, (2) species richness peaked in highly developed peri-urban areas, (3) anuran abundance scores were highest in abandoned lots, and (4) highest similarity was found between the anuran community from highly developed peri-urban areas and abandoned lots. Although this study was carried out in a single city, and we only recorded four species, our results suggest that the urban semi-permeability process occurs for anuran communities, plus the fact that abandoned lots seem to offer better breeding habitat for anurans than a polluted waterway.  相似文献   

20.
Urban Ecosystems - The sheep tick Ixodes ricinus is the primary vector for various zoonotic diseases, including Lyme borreliosis and tick-borne encephalitis (TBE), in Europe. Because both abundance...  相似文献   

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