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排序方式: 共有159条查询结果,搜索用时 31 毫秒
31.
Archaeological and historical investigation of WWII battles fought in the Micronesian archipelago of the Mariana Islands has generally concentrated on the fierce struggles for Saipan, Tinian, and Guam. Smaller islands that were neutralised during the U.S. thrust to establish air bases for the bombing campaign over Japan beginning in 1944 have received less attention, but were a strategic link in the Absolute National Defence Sphere. This paper examines the archaeological evidence of Japanese military planning for the defence of the island of Pagan situated north of Saipan, a battle that was never fought. The strategy based on an analysis of fixed weaponry emplacement appears to have been conceived in terms of engagement evolving from a ‘defence-at-the-waters-edge’ tactic in the southern Mariana Islands towards a ‘defence-in-depth’ posture faced in Iwo Jima and Okinawa. 相似文献
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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
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Within the context of the war on poverty and an acknowledgement of the wider global phenomenon of a ‘post-industrial society’, the Australian Labor Party under Gough Whitlam sought out a range of reforming and innovative social policy programs. This article explores the origins of one such program, the Australian Assistance Plan (AAP), and its connections, similarities and differences to the Canada Assistance Plan. Drawing on extensive archival and oral history sources, it offers a comparative analysis of both national programs, then outlines how international social planning and community development ideas, especially from Canada, infused the AAP and its predecessor, the Geelong Experiment. 相似文献
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This article examines the effectiveness of UNIDO in addressing the challenges of environmental degradation and in helping developing countries promote sustainable development paths. The analysis suggests that the slow process of integrating environmental concerns in UNIDO's activities was affected both by internal organizational factors, such as the shared professional values in UNIDO's institutional culture and its organizational flexibility and responsiveness, and by factors relating to the external context, including financial constraints and interagency conflicts. In contrast to studies of successful persuasion of ‘epistemic communities’ in international negotiations, this article looks at the factors which have impeded the process of persuasion. At the theoretical level, it seeks to analyse the difficulties of changing the policy agenda in a specific international organization. 相似文献
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Erik Gartzke 《政策研究杂志》1996,24(2):259-286
Few pieces of legislation in the realm of foreign policy decisionmaking have greater potential effect or are more controversial than the War Powers Resolution. The Resolution was intended originally to create greater leverage for Congress over executive use of military force. In this effort, it is widely believed that the Resolution has been ineffective. This paper uses an information theoretic model to examine the War Powers Resolution. Results of the modeling process allow for two general assertions. First, the model suggests that the Resolution is an optimal choice of procedure by the legislature. In other words, the War Powers Resolution is better for Congress than its alternatives. Second, the information theoretic approach used here seems to coincide with an anecdotal history of the war powers debate better than do alternative explanations. Indeed, the analysis helps to explain why war powers legislation was not considered seriously sooner. Though criticism of the War Powers Resolution has its merits, claims for a variety of alternative procedural systems may be open to challenge. Those wishing to establish mechanisms for curtailing executive adventurism abroad may find it more rewarding to focus efforts on the budgeting process or on the reduction of military force structures. 相似文献
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Erik Dietzenbacher 《Journal of regional science》1997,37(4):629-651
Ghosh's ‘supply-driven’ input-output model is a well-known alternative for Leontief's traditional ‘demand-driven’ input-output model. The Ghosh model calculates changes in gross sectoral outputs for exogenously specified changes in the sectoral inputs of primary factors. Typically, the model is interpreted so as to describe physical output changes as caused by changes in the physical inputs of primary factors. It has been convincingly argued, however, that this interpretation in terms of quantities is implausible. In the present paper it is shown that the supply-driven input-output model becomes plausible, once it is interpreted as a price model. That is, sectoral output values change due to price changes, which are caused by price changes for the primary inputs. Therefore the term Ghosh price model is adopted for the supply-driven model, whereas the demand-driven model is referred to as the Leontief quantity model. Dual to this Leontief quantity model is the standard Leontief price model. It is shown that the results obtained by the two price models are equivalent. Interpreting the supply-driven input-output model as a price model also allows for a meaningful interpretation of the inverse matrix in terms of multipliers. As the dual to the supply-driven (or Ghosh price) model the Ghosh quantity model is derived, which is equivalent to the demand-driven (or Leontief quantity) model. 相似文献
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Erik Stam 《European Planning Studies》2015,23(9):1759-1769
Regional policies for entrepreneurship are currently going through a transition from increasing the quantity of entrepreneurship to increasing the quality of entrepreneurship. The next step will be the transition from entrepreneurship policy towards policy for an entrepreneurial economy. The entrepreneurial ecosystem approach has been heralded as a new framework accommodating these transitions. This approach starts with the entrepreneurial actor, but emphasizes the context of productive entrepreneurship. Entrepreneurship is not only the output of the system, entrepreneurs are important players themselves in creating the ecosystem and keeping it healthy. This research briefing reviews the entrepreneurial ecosystem literature and its shortcomings, and provides a novel synthesis. The entrepreneurial ecosystem approach speaks directly to practitioners, but its causal depth and evidence base is rather limited. This article provides a novel synthesis including a causal scheme of how the framework and systemic conditions of the ecosystem lead to particular entrepreneurial activities as output of the ecosystem and new value creation as outcome of the ecosystem. In addition it provides a framework for analysing the interactions between the elements within the ecosystem. This offers a much more rigorous and relevant starting point for subsequent studies into entrepreneurial ecosystems and the regional policy implications of these. 相似文献
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