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This article explores the role of commodities in the construction of identities by examining the use of the bicycle in the Netherlands in comparison with and contrast to Germany. It argues that cyclists in Germany and the Netherlands used the bicycle to construct and display a certain identity and to express certain views of themselves as well as of the society in which they lived. The popularity of the bicycle in Dutch society can thus be explained by its particular meaning in that society. The vehicle became an important object in Dutch national identification, whereas in Germany, despite its widespread use especially among the working class, the bicycle was viewed as outdated and inferior technology by the 1920s.  相似文献   
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Dramatic deterioration of Hellenistic-Roman limestone remains recently excavated at Dülük Baba Tepesi (Southern Turkey) has been observed following the cold, wet winter of 2011/2012. A conceptual model is presented to explain the dramatic deterioration in which case hardening develops and initially strengthens the stone against deterioration, but then makes it more prone to exfoliation and blistering. Data collected using non-destructive techniques (Equotip surface hardness tester and Karsten tube for water uptake) on F?rat and Gaziantep formation limestone time series excavated in 2005, 2007, and 2013 demonstrates the progress of case hardening and deterioration after excavation. In combination with meteorological data from Gaziantep weather station the results are used to test and revise the model taking into account non-linear and threshold effects. Future excavation and conservation efforts should take into account the often-complex interactions between post-excavation case hardening and extreme winter conditions which can cause catastrophic deterioration.  相似文献   
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large part of the work in economic geography and other social sciences has focused on new growth prospects due to the establishment of global production chains and the rise of new clusters of industrial activity. Much less attention has been paid to former growth industries and regions that have recently experienced shrinking processes due to internationalization. This paper will explore the cases of two chemical regions, i.e. southern Hessen, Germany and Rhône-Alpes, France. These two areas have both undergone drastic restructuring since the mid-1990s, due to the merger of the prominent chemical groups Hoechst and Rhône-Poulenc into Aventis. Instead of investigating the development of the core activities at Aventis, we will focus on the operations that were considered less important and consequently split off. In addition to the negative consequences produced by these activities, in our analysis we also emphasize regional opportunities which arise from competence building, reorientation and new firm formation. These processes can be viewed as re-bundling existing and new knowledge bases with other resources to help overcome economic crises and develop a new competitive edge. As such, the paper aims to contribute to a relational understanding of economic globalization and regional restructuring.  相似文献   
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