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This article presents a probabilistic fragility analysis for two groups of integral and jointed concrete bridges, with varying length and column height. The results show that the integral bridges perform consistently better from a seismic perspective than the jointed bridges. Comparisons are also drawn between the seismic fragility of different geometric configurations. The results show that for integral bridges, the seismic vulnerability increases with an increase in bridge length and decreases with an increase in column height. For the jointed bridge, it was found that geometric variation in column height and bridge length does not significantly affect its seismic vulnerability.  相似文献   
23.
Charles Bridge in Prague, founded in 1357, is one of the most prominent historical structures in Europe. It interconnects two Prague districts, the Lesser Town and the Old Town districts, separated by the Vltava River. In the past, the bridge underwent a variety of repairs and retrofits. Within the framework of the moderate repair carried into effect in 2007 to 2010, a measuring system was installed in the bridge, and the temperature and moisture content at selected gauge points have been continuously monitored for a period of 2 years. This article presents non-linear, fully coupled modeling of both fields utilizing a parallel version of the simple finite elements (SIFEL) computer code. Its cogency is validated against experimentally obtained data that serve as inputs for the second stage of a thermo-mechanical analysis—the detailed and mechanics-oriented simulations of the bridge as a whole.  相似文献   
24.
Aesthetic responses to landscape may be emotional, sensory, or experiential, or a combination; it is a difficult value to identify and assess. This paper considers changing perceptions of the aesthetic values of the Yarra Valley landscape using a heritage methodology that involves examining artistic, creative, and published sources accounting for a lengthy period of changing land use. Scenic quality mapping, where available, is used as a support, and extensive reference is made to Australian impressionist art. Artworks for Yarra Valley landscapes may be considered as being among the cultural heritage indicators of significance and there is a new aesthetic of land art in private venues for the visiting public. The paper also illustrates how aesthetic values have been more broadly recognised in the post‐World War II era and become the domain of planning authorities as well as artists. It is for regional planners to be aware of and maintain these aesthetic values in the landscape.  相似文献   
25.
During recent years, Spain has experienced an important revolution in its migration flows. With the 2008–2013 Spanish financial crisis, the model of economic growth that attracted a large number of foreign people disappeared, and the entry of immigrants for reasons other than economic issues gained relevance. Linked with this phenomenon are the new patterns of locational choice across provinces and the variation in the nature of immigrants. In this paper, we examine the differential patterns and drivers of immigration across Spanish regions before and after the financial crisis. Special attention is paid to the question of how the characteristics of individual migrants influence their locational preferences. To answer this question, we use the Dirichlet multinomial regression model. The results obtained show a sharp change in the locational patterns of Spanish immigrants after the economic recession, confirming that traditional economic incentives are less relevant, while non-economic factors linked with a better lifestyle gain importance. They also reveal that, regardless of the economic conditions, network effects are strong. Finally, and what is probably more important for us, our estimates support the hypothesis that the locational preferences rely on the interaction between the immigrants’ characteristics and the underlying locational features.  相似文献   
26.
Ringforts, the most numerous archaeological monument in the Irish landscape, have a dual character as places of early medieval habitation and as supernatural points of access to a fairy Otherworld. In my paper, I examine how these understandings interacted with, challenged and reinforced each other in the nineteenth and early twentieth century, and how oral perceptions had a significant if generally unacknowledged role in determining supposedly scientific archaeological perceptions of these monuments.  相似文献   
27.
Contemporary innovation processes increasingly involve a large number of networked actors, and cross-fertilization between knowledge institutions and firms has thus become a significant driver for innovation. Important insights into the differing nature of research and development (R&D) collaboration in particular sectors have been provided by research inspired by the knowledge-base approach embedded within innovation system (IS) theory. This study aims to contribute to this body of literature by applying the concept of differentiated knowledge bases to the former state-socialist countries, where the IS operates through a firewall between academia and industry. Data on collaborative R&D projects co-financed by public resources have allowed a detailed analysis of the nature of collaboration networks, revealing emerging patterns of academia–industry linkages and questioning the propositions stemming from the knowledge-based approach. The study concludes that collaborative science–industry networks show a very distinct topography when analytical and synthetic knowledge is compared.  相似文献   
28.
The research on the economic convergence of Central and Eastern European countries towards the old EU members is voluminous, and it has an obvious appeal to both policy-makers and public. Unlike the traditional literature concerned with selected macro-patterns of the European convergence process, this paper presents a comparative study of two economies, attempting to comprehend more nuanced aspects and underlying mechanisms shaping their evolution. It examines the evolutionary dynamics of the structure and spatial organization of the Czech and Austrian economies since the late 1980s. Therefore, as a basis for subsequent analysis, the conceptual part attempts to systematize the key specific factors of the former command economies. The empirical results show that, despite significant similarities in the structure of these economies, the absolute and relative productivity as well as the spatial relatedness of the main types of industries reveal important differences between these two countries. These distinctions tend to be disregarded when making inferences about the European convergence process on the basis of traditional literature concerned predominantly with macro-patterns. Consequently, this study shows that since the collapse of socialism, Czechia has been reintegrated into the global economy in a different way from Austria, implying different evolutionary trajectories in the future.  相似文献   
29.
A new microdomatid gastropod, Eopagodea sevillana gen. and sp. nov., is described from the Late Ordovician (pre-Hirnantian Ashgill) limestones of Seville, Ossa Morena Zone, Spain. Palaeozoic microdomatids lived in shallow-water environments and were restricted to warm-water regions. Occurrence of microdomatid gastropods in the pre-Hirnantian Ashgill limestones of the Cerrón del Hornillo syncline (Ossa Morena Zone, Spain) is interpreted as an example of an influx of warm-water faunal elements into the otherwise cool to cold climate of the Mediterranean region during a short-termed, pre-Hirnantian increase of palaeotemperatures. The Late Ordovician microdomatid genus Daidia Wilson, 1951, is revised and two new Late Ordovician (Ashgill) subspecies of Daidia cerithioides (Salter, 1859) are described: Daidia cerithioides sewardensis n. subsp. from the Don River area of the York Mountains, Seward Peninsula, western Alaska, and Daidia cerithioides wilsonae n. subsp. from the Little East Lake Formation of northwestern Maine.  相似文献   
30.
Narratives of nation and identity are highly contested in Northern Ireland, with allegiance usually given to an Irish nation or a British nation, or located somewhere along a continuum between the two. The negotiation of one's identity along this continuum can become particularly complex once one migrates outside Northern Ireland. Adopting a sense of belonging to or exclusion from an Irish diasporic community is part of this process of negotiation. This paper explores these negotiations of identity among both Catholic and Protestant migrants from Northern Ireland to England. It utilises an oral history archive of interviews with individuals who migrated in the latter half of the 20th century, and focuses on narratives of nation and identity among these migrants. Drawing on the notion of England as a diaspora space, in order to make sense of these narratives, the intersections between diasporic Irishness and different British identities are untangled in an attempt to draw out the spaces ‘in‐between’ two, often polarised, narratives of nation.  相似文献   
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