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排序方式: 共有163条查询结果,搜索用时 15 毫秒
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Erik M. Conway 《History & Technology》2013,29(2):115-134
A series of dramatic mid‐air collisions during the late 1950s caused the United States to embark on a reconstruction of its air traffic control system. In pursuit of the concept of ‘positive control’ over all aircraft, the Federal Aviation Agency modified and deployed military technologies under orders to eliminate these highly public catastrophes. In the process, it curtailed one of flight's great dreams, freedom of the skies, imposing technological and procedural requirements on fliers wanting access to urban airspace. Resistance from private fliers produced modification of some of the agency's plans, causing it to adapt its planned airspace structures to permit private fliers limited access without having to submit to the control system. 相似文献
73.
Erik Swyngedouw 《对极》2010,41(Z1):298-319
Abstract: This essay starts from the presumption that “the communist hypothesis” is still a good one, but argues that the idea of communism requires urgent re‐thinking in light of both the “obscure” disaster of twentieth century really existing socialism and the specific conditions of twenty‐first century capitalism. I explore the contours of the communist hypothesis, chart the characteristics of the revolutionary capitalism of the twenty‐first century and consider how our present predicament relates to the urgency of rethinking and reviving the communist hypothesis. Throughout, I tentatively suggest a number of avenues that require urgent intellectual and theoretical attention and interrogate the present condition in light of the possibilities for creating communist geographies for the twenty‐first century. 相似文献
74.
Documentation of cutmarks is standard protocol in contemporary zooarchaeology. However, there is currently no consensus about how to best quantify them. This study examines differences in cutmark patterning using two approaches: 1) by means of an experiment, comparing a control cutmark pattern to ten simulated highly fragmented sets of front and rear limbs using %NISPcut as the quantitative unit, and 2) by quantifying an archaeological faunal assemblage using both the number of identifiable specimens (NISP) and the comprehensive minimum number of elements (cMNE). Results reveal significant differences in cutmark patterning between the control set and the simulated fragmented sets. Additionally, the ordinal-scale frequencies of cutmark anatomical portions (proximal, shaft, distal) are inconsistent and fluctuate across the simulated sets. Results of the zooarchaeological analysis show that differences between the two quantification methods are significant. In general, this study suggests that on heavily fragmented assemblages, interpretations of butchering behavior based on cutmark patterning are influenced by the chosen unit of quantification. Overall, using NISP as the quantitative unit provides inconsistent results, whereas, by alleviating the effects of high fragmentation, cMNE is more reliable. 相似文献
75.
Caroline A. Rodenburg Henri L. F. De Groot Erik T. Verhoef 《European Planning Studies》2010,18(5):709-735
Urban (re-)development projects may generate various positive and negative spatial externalities to employers. The assessment of such benefits is fraught with many methodological and empirical problems. This study aims to assess the order of magnitude of expected net benefits for incumbent employers that may accrue from a large-scale development project in the Zuidas area in the South-Western part of Amsterdam, the Netherlands. This development project is planned to transform the area into a large multifunctional urban agglomeration. We employ a specific stated preference method (namely, a willingness-to-pay method) to gauge the project's net socio-economic benefits for the current firms in the area concerned, paying special attention to the benefits associated with multifunctionality. 相似文献
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AbstractAlthough the development of creative industries (CI) has formed into extensive and significant phenomenon in European cities, the conceptualization and generalization of these practices and policies is still rather weak. In addition to the attempts to explain the formation of these kinds of practices in the cities and discuss the path-dependent character of CI policies, the challenging task is to identify the main alternatives and inherent logic of CI policies, especially due to the existing rich and diverse experiences of European cities. This article aims to build a typology of the policy practices relating to CI. We make use of an “ideal types” approach, which focuses on determining a limited number of parameters to characterize alternative CI policies in different (European) cities; this is based on how one kind of CI policy practice can be distinguished from another. The article examines how the CI policies in four post-socialist cities (three of which are located in the Baltic region) contrast with the policies found in a range of other cities in Europe. 相似文献
78.
Erik Eggen 《Symbolae Osloenses / auspiciis Societatis Graeco-Latinae》2013,87(1):181-189
1. Lettres lisibles: Efforts dans l'antiquité classique pour que les textes incisés sur pierre et affichés à usage public puissent être facilement lus. 2. Πoλιτικη et les Contes des Mille et Une Nuits: Πoλιτικη aus sens de prostituée apparaît encore dans les Contes des Mille et Une Nuits. 3. Kερκυσερα ou l'ambiguïté d'Achille: Par sa formation, le nom ou sobriquet Kερκυσερα d'Achille dissimule et en même temps révèle l'état ambigu d'Achille dans le gynécée du palais de Lykomède à Skyros. 4. Une expression poétique dans une novelle de Théodose H: L'expression poétique lux sola brevitatis et son corollaire nox longa. 5. Zenon rougissant: L'interpellation Foινικiδιoν de Zenon par son maître Kratès fait allusion à la rougeur d'embarras de Zenon plutôt qu'à son origine. 相似文献
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