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排序方式: 共有476条查询结果,搜索用时 31 毫秒
101.
Anna Fedrigo Markus Strobl Alan R. Williams Kim Lefmann Poul Erik Lindelof Lars Jørgensen Peter Pentz Dominik Bausenwein Burkard Schillinger Anton Kovyakh Francesco Grazzi 《Archaeological and Anthropological Sciences》2018,10(6):1249-1263
We present novel imaging results from a non-invasive examination of three ‘pattern-welded’ swords from the Viking Age belonging to the National Museum of Denmark, using white beam and energy resolved tomographies with neutrons. Pattern-welded blades are made by forge welding together thin strips of iron and steel that were twisted and joined in various ways, producing a decorative pattern on the surface. The study shed light on the inner structure of the composite material and manufacturing techniques of these admired examples of past technology, revealing some otherwise invisible details of their assembly methods, phase distribution and extent of the corrosion. 相似文献
102.
Sonia Fayman Pierre Metge Klaus Spiekermann Michael Wegener Tony Flowerdew Ian Williams 《European Planning Studies》1995,3(3):333-356
The paper addresses the question of how different types of regions mill be affected by the development of a major new transport infrastructure such as the Channel Tunnel. It summarizes a study on the regional impacts of the Channel Tunnel throughout the European Union (EU). The research design combined qualitative methods of futures exploration employing 13 regional case studies with quantitative forecasting techniques using the MEPLAN transport and economic model. The paper presents the methodology and major results of the two approaches with respect to the impacts of the Channel Tunnel on transport flows and regional development in Europe and draws conclusions for transport and regional policy of the EU. The paper demonstrates that the removal of a bottleneck like the Channel Tunnel does not necessarily induce economic gains in all adjacent regions. Much more important for regional economic development than the reduction of transport costs are the image to be a region well integrated into the European high‐speed transport network and an active political response of the region to take advantage of opportunities like the Channel Tunnel. 相似文献
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The peripheral location of Northern Ireland as an Objective 1 region in the EU and consequences in terms of competitiveness and economic disadvantage are discussed. The need for high levels of public expenditure to at least partly offset these effects is argued; this is particularly apparent in the mechanisms which have been adopted to promote urban regeneration. The dominance of central government in the planning and development process is highlighted together with recent policy initiatives that place increasing emphasis upon partnerships as a delivery mechanism. The paper examines various forms of partnership arrangements highlighting how structures and actors differ depending upon local circumstances and objectives. 相似文献
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Williams LP 《The History teacher》1980,13(3):379-383
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