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The expansion of primary breeding companies for layer hens has reached a global scale. Two groups of companies, the Dutch Hendrix Genetics BV and the German EW Group GmbH, dominate the trade with layer hens for industrial egg production in most countries of the world. This article aims to identify the main actors of industrial egg production and to analyse the structure of the global layer hen production network. Furthermore, this paper examines the importance of brands and quality within the production network. While the primary breeding level is discussed on a global scale, the secondary breeding level and the egg production is analysed at a national level for Germany. Since the importance of brands is strongly related to the quality of the products and the trust therein, the structure of the layer hen production network in regard to the role of brands and trust is evaluated. For this evaluation, the authors combined the global production network approach with elements of the convention theory.  相似文献   
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ABSTRACT

Research has shown the neighbourhood as an influential environment concerning children’s independent mobility and activity participation. However, its influence on the everyday experiences of children with disabilities is not well understood. This article addresses this gap by studying the accounts of ten nine-12 year olds from south-east Queensland, Australia, who have diverse mobility impairments. This phenomenological study reveals mobility is a conditional act. Conditionality is understood by the way social and spatial factors intersect to influence one’s mobility about the street – or in our case coerced immobility. The body-space practices also reveal a mismatch between children’s embodiment and the neighbourhood environment, which intensified and converged at the absent footpath, with crucial repercussions for their spatial agency and activity participation. The findings suggest the importance of understanding diverse body-space practices in mobility studies and the need to contest ableism in street design to create inclusive walkable neighbourhoods for all.  相似文献   
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Knowledge has become a key source of competitiveness for advanced regions and nations, indicating a transformation of capitalism towards a “knowledge economy”. Knowledge intensive sectors in production and in services have a lead in this respect, they can be considered as role models for the future. The innovation process, the mechanisms of knowledge exchange and the respective linkages in those industries differ quite markedly from those in other sectors. Clustering and local knowledge spillovers are frequently stated phenomena, although it is still unclear as to what the nature and geography of those knowledge links are. The aim of this paper is to examine the character of the innovation process and the type of interactions in those industries, in order to find out how strongly they are related to regional, national and international innovation systems. We will analyse the sources and the mechanisms of knowledge exchange and their relevance for innovation. The paper develops a typology of innovation interactions and provides empirical evidence for Austria based on data from a recent firm survey.  相似文献   
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In autumn 793, Charlemagne visited the fossatum magnum (the ‘big ditch’ or canal) between the Rhine and Danube. Excavations, dendrochronology and a re‐reading of Carolingian Annals shed new light on the chronology and setting of this canal, which was planned in 792, initiated in 793, and abandoned later that year. The abandonment is attested by both written and archaeological evidence. The different versions of the annals offer a unique opportunity for comparison with the archaeological record. Evidence that works of Vitruvius circulated in the Carolingian court suggests that Charlemagne’s advisers were drawing on classical tradition when they pitched the idea of digging the canal.  相似文献   
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The article surveys relevant commentary on the Phaiakian passages of the Odyssey and proposes a new interpretation of the actions of the major figures in them. In particular, a concern for the security of his kingdom is found to motivate the easily misinterpreted remarks and actions of Alkinoös.  相似文献   
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