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This paper presents the theory of enterprise clusters and industrial districts, and contrasts it with the evidence of two productive agglomerations in the fashion sector in Colombia. The empirical evidence on Bucaramanga and Medellín, that host the largest groups of Colombian textile and clothing producers and exporters, is based on a survey questionnaire, carried out in November–December 1998. The results of the survey confirm the relevance of the Industrial district concept in understanding the recent developments of Colombia's textile and garments industry, and reveal the presence of some dimensions of an enterprise cluster in both Medellín and Bucaramanga, although each with different characteristics. However, both Colombian clusters are characterized by a low degree of firm–level specialization and poorly–developed enterprise networks. This is similar to what has been observed in most enterprise clusters in Latin America, and may clearly hinder the local external economies and collective efficiency. Backward linkages are poor or lacking in both clusters. The strategy prevailing in most enterprises has been the internalization of many stages of the productive process. Forward linkages are much stronger, and the retailers play a crucial role in the commercial phases. However, only Bucaramanga firms have entered global production and marketing networks, whereas Medellín firms are mainly oriented to the national market. Moreover, the two clusters have developed under very different economic policy regimes, and this had had its consequences on the clusters' performance and structure.  相似文献   
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New Tremadocian ostracod material from the Alborz Mountains of Iran confirms the early and widespread occurrence of the Ordovician genus Nanopsis, and the apparently simultaneous first appearance of ostracods in the fossil record at the level of the P. deltifer conodont biozone (485.5 Ma) from China to Argentina. Nanopsis pairidaeza sp. nov. adds to the pool of species diversity for the Early Ordovician, though documented Tremadocian ostracod generic diversity remains low, with only four genera. The presence of Early Ordovician ostracods in Alborz, their occurrence elsewhere in palaeocontinental Gondwana, Baltica and China coupled to their marked absence from the Tremadocian of Laurentia and Siberia, supports the notion of the earliest occurrence of ostracods centred on Gondwana/Baltica.  相似文献   
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One of the frequently encountered issues in ancient Greek dietary reconstructions through isotope analyses has been the apparent unimportance of fish protein in human diets. The significance of this observation is amplified by the abundant ichthyofaunal remains, iconographic evidence and literary information on fish and fishing, pertaining to almost all sites and time periods of Greek antiquity. In this project, we measured for the first time isotopes from a large number of fish bones from Greek sites dating from the Mesolithic to the Classical times, aiming to investigate whether this absence is an artefact of the methodology or whether it reflects a reality of restricted fish consumption. Results show that regional trends are stronger that temporal ones in fish isotope values. The range of values overlaps with terrestrial resources, making it difficult or impossible to reject fish consumption based on isotope data alone. This variability proposes a reconsideration of the amount of fish in ancient Greek diets specifically for each site and amplifies the importance of interdisciplinary studies, especially for regions with variable ecological resources.  相似文献   
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This article examines the evolution of the nuclear enterprises in Russia and Ukraine after the break-up of the USSR in 1991 to the present and contributes to better understanding of interrelation between large-scale technologies and politics. It compares how economic crises and recovery, political considerations, and nuclear imaginaries – visions of the role that nuclear power will play in conceptions of a national future – have determined the direction of nuclear energy policy. It explores institutional, legal, and other developments surrounding the 34 operating power reactors in Russia and 15 in Ukraine including promotion and regulation; operation; license life extension; decommissioning and spent fuel and waste handling. Russia and Ukraine are connected by history, Soviet reactor technology, and nuclear fuel and waste disposal agreements that shape and constrain the countries’ behavior, and leave great uncertainty for the future given the ongoing conflict between the two nations. Yet both nations hope for some grand nuclear ‘renaissance.’  相似文献   
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This article argues that, in Mexico, the Manila Galleon fostered local manufacturing, promoted regional trade networks, and enabled Indians and people of mixed ancestry to participate in a monetized economy along with Spanish colonists. Several activities related to the ships’ annual embarkment at Acapulco illustrate this economic impact, including the delivery of provisions like hardtack, the transportation of merchandise, and the administration of services to travelers  相似文献   
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Abstract

Women’s Sense of Farming is a qualitative study of women farming as part of the local food movement in Vermont, U.S.A. The study puts the lives of women farmers in conversation with ecofeminist theory in order to examine how women farmers simultaneously enact critiques of culture, while also mimicking dominant narratives. The study subjects’ narratives of their lives show how they navigate the reason/nature dualism (as articulated by philosopher Val Plumwood). The result of the study is a set of values and experiences that show the successes and challenges of local food farmers working toward social, environmental, and economic sustainability.  相似文献   
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