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Several studies have shown dense urban structures to be favourable in order to reduce greenhouse gas emissions from transport, limit energy consumption in buildings and protect farmland and natural areas in the surroundings of the city. There may, however, be some tensions between such a compact urban developmental strategy and considerations of public health in urban planning. This paper reviews findings from international research on the relationships between urban form and health and illustrates some of these effects by comparing statistics on life expectancy and the frequency of heart attacks among inhabitants of different urban districts in the Norwegian capital Oslo. Since we have only had access to aggregate figures at the level of urban districts, the results must be interpreted with caution. The currently available results do, however, suggest that the densification strategies often recommended for reducing the ecological footprints of cities might be encumbered with some important drawbacks, seen from a public health perspective. Based on the findings, some dilemmas and perspectives for sustainability- and health-oriented urban planning are discussed.  相似文献   
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Some firms within the conventional agri-food processing industry change their business strategy by trying to innovate towards alternative foods, like regional foods. For firms which are part of a larger organization or integrated in a group of companies this is a special challenge. The purpose of this paper is to explore what happens when a firm within a large and complex organization tries to turn from a productivist strategy to a differentiated strategy. This exploration uses a case study from the Norwegian dairy industry. The case shows that powerful industrial conventions and lack of suitable organizational conditions can be a hindrance for organizational change. Organizational capabilities to change routines and conventions have significant influence on the result of the innovation process.  相似文献   
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Neomalthusians have regularly predicted "water wars" while cornucopians have argued that there is no inherent water scarcity and liberal institutionalists have seen cooperation as a more likely outcome of competition for limited water resources than violent conflict. Three earlier studies have found a positive statistical relationship between shared rivers and low-level interstate conflict. Based on a more comprehensive dataset, an improved model of conflict, and a more appropriate control for geographical opportunity, we argue that these results are spurious and that we cannot establish a conflict-inducing effect of shared rivers over and beyond contiguity itself. In fact, the new dataset presented here makes it clear that nearly all neighbors in the international system share at least one river. This calls for a different approach to investigating interaction in shared river basins. This notwithstanding, freshwater and other shared resources may still provide a mechanism to explain why contiguity is robustly associated with conflict, so the water-conflict scenario cannot be dismissed. Indeed, our results show that among river-sharing states, basins with an upstream/downstream configuration increase the risk of conflict. The article finally discusses how river interaction should be further investigated based on these results and what new data are needed to enable such research.  相似文献   
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In the last few years, occult head‐hunters – elusive figures that have haunted communities and the public imagination in Indonesia since at least colonial times – appear to have adopted a novel and troubling tactic. Instead of decapitating their victims and using the heads in construction rituals as they are said to have conventionally done, head‐hunters are now allegedly harvesting their victims’ organs to sell them on the global market of body parts. Based on a comparison of ethnographic material from North Maluku, a province in the eastern part of Indonesia, and news reports in regional and national papers, I trace how accounts about headhunting have morphed with narratives about organ theft. I argue that this plasticity is not a merely a change in symbolic ideas of the occult that reflects changing political and economic realities. Rather, I propose that their turn to organ theft enrols head‐hunters in a contemporary and global ‘travelling package’ that includes and entangles organ trafficking practices, media accounts, political imaginaries, and social anxieties within the same field of reality and possibility, a field of verisimilitude in which fiction and fact, rumour and reality, are fundamentally blurred. The article proposes a ‘more‐than‐representational’ approach to the organ‐stealing head‐hunter that sees him not just as a representation of particular political and historical circumstances but as a co‐producer of these circumstances, of particular political worlds and their attendant scales of anxiety. This approach, I argue, challenges the epistemological distinction between symbolic representation and political reality that informed (but also incommoded) the analyses of headhunting rumours in the 1980s and 1990s – and that continues to inform anthropological analyses of ‘the occult’ more generally.  相似文献   
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This article provides an empirical evaluation of a hierarchical approach to modeling commuting flows. As the gravity family of spatial interaction models represents a benchmark for empirical evaluation, we begin by reviewing basic aspects of these models. The hierarchical modeling framework is the same that Thorsen, Ubøe, and Nævdal (1999) used. However, because some modifications are required to construct a more workable model, we undertake a relatively detailed presentation of the model, rather than merely referring to the presentation in Thorsen, Ubøe, and Nævdal (1999) . The model uses a hierarchical specification of a transportation network and the individual search procedure. Journeys to work are determined by the effects of distance deterrence and of intervening opportunities, and by the location of potential destinations relative to alternatives at subsequent levels in a transportation network. The model calibration uses commuting data from a region in western Norway. The estimated parameter values are reasonable, and the explanatory power is very satisfactory when compared with the results of a competing destinations approach.  相似文献   
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This study is devoted to empirical and modeling aspects on how characteristics of spatial structure influence commuting flows. Within a doubly-constrained framework, results from a competing-destinations formulation are evaluated and compared to results from the traditional gravity model. The evaluation depends critically upon the specification of within-zone journeys-to-work. Specific labor-market characteristics are found to be significant to explain how workers are absorbed in diagonal elements of the trip-distribution matrix. We also find that the parametric specification of the accessibility measure is important, and that the competing-destinations formulation is superior to the traditional gravity model.  相似文献   
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