排序方式： 共有210条查询结果，搜索用时 15 毫秒
51.
52.
Colin K. Ballantyne Sue Dawson Ryan Dick Derek Fabel Emilija Kralikaite Fraser Milne 《Scottish Geographical Journal》2018,134(1-2):71-96
Little is known of hard-rock coastal landsliding in Scotland. We identify 128 individual coastal landslides or landslide complexes >50 m wide along the coasts of Shetland. Most are apparently translational slides characterized by headscarps, displaced blocks and/or debris runout, but 13 deep-seated failures with tension cracks up to 200 m inland from cliff crests were also identified. Thirty-one sites exhibit evidence of at least localized recent activity. Landslide distribution is primarily determined by the distribution of coastal cliffs >30 m high, and they are preferentially developed on metasedimentary rocks. Analysis of 16 landslides on Fetlar (NE Shetland) indicates that most are translational dip-slip failures; 3 represent deep-seated failures and several exhibit active frontal erosion attributable to basal sapping by storm waves. As these landslides terminate in shallow water, failure was probably initiated when rising sea level resulted in footslope erosion and upslope propagation of instability, causing downslope displacement of landslide blocks on upper slopes. 10Be exposure dating of two headscarps yielded ages of 4.8?±?0.2 ka and 4.4?±?0.2 ka, consistent with the onset of footslope erosion as sea level rose. Our results suggest that landslides have played a hitherto undocumented but important role in retreat of cliffed coastlines in Scotland. 相似文献
53.
《Archaeology in Oceania》2018,53(2):116-127
Bluff Harbour, in southern New Zealand (Murihiku), is the southernmost location of Polynesian adze production. Here, an industry developed during the colonisation phase based on the exploitation of numerous sources of argillite – a fine‐grained, homogeneous rock with conchoidal fracture properties. Argillite from the Bluff and Riverton sources was a major attractor during the earliest period of human occupation and Bluff argillite adzes were distributed widely throughout the lower South Island. The most extensive sources of Bluff argillite are on Colyers Island, where there is evidence of quarrying and preform production along much of the coast. The sites on Colyers Island were surveyed as the first part of an archaeological investigation of quarrying and adze production in Bluff Harbour. The quarried boulders, outcrops and artefact distributions at these sites indicated that the raw material was exploited by highly organised and skilled craft specialists. The initial stages of adze manufacture were undertaken at the quarry, and then preforms were taken to multipurpose camp sites around the harbour for finishing. Adze blanks on Colyers Island were made from large flakes, tabular blocks and cobbles, using imported hammer stones. This paper documents the significance of Colyers Island as an important adze production complex in New Zealand. 相似文献
54.
55.
This article uses historical data on inventor and firm researchand development (R&D) lab locations to examine the technologicaland geographic structure of corporate knowledge capital accumulationduring a formative period in the organization of United Statesinnovation. Despite the localization of inventive activity aroundthe labs, one-quarter of inventors lived outside a 30 mile commutingradius of the nearest facility of the firm they assigned theirpatents to. A strong positive effect of distance from a labon technological importance is identified, especially for inventorsfrom large cities that were geographically separated from afirm's; labs. A patent case–control method helps explainspatial sourcing by showing that the average quality of externallyavailable inventions was high. Firms selected complementary,not substitute, inventions from non-lab urban locations, suggestinga link between the organization and the geography of innovation. 相似文献
56.
Nur Köprülü PhD 《Domes : digest of Middle East studies》2017,26(2):278-298
Representing one of the most stable regimes in the Middle East, Jordan has been undergoing a process of political liberalization since 1989. Due to the so‐called East Bank‐West Bank cleavage that followed by the influx of Palestinian migrants to Jordan, the country has also come to epitomize a divided society. Within this context, this paper aims to analyze the ongoing prospects for democratization in Jordan through an examination of four persistent debates shaping its electoral pluralism: those over social/identity division, electoral law as a regime‐survival mechanism, the role of the Ikhwan and the IAF's electoral boycotts, and electoral apathy. Finally, the impact of the Arab upheavals/revolts on restructuring the process of political reform — as well as opposition in the kingdom in the post‐2011 era — will be explored with reference to the changing dynamics of Islamist opposition. 相似文献
57.
Public Policy Issues and Campaign Strategies: Examining Rationality and the Role of Social Media in a Legislative Election Within a Middle Eastern Context 
下载免费PDF全文
下载免费PDF全文 Abdulfattah Yaghi PhD Osman Antwi‐Boateng PhD 《Domes : digest of Middle East studies》2017,26(2):398-421
While most studies from western countries emphasize rationality in electoral behavior, the present study proposes that rationality is also a driver of candidates’ behavior in a non‐Western context. The purpose of the present study is to map campaign content as well as campaign strategies of 214 candidates in the 2015 United Arab Emirates legislative elections. The qualitative analysis showed rational consideration drove the selection of both campaign strategies and public policy positions. Candidates decided to include patriotism and social and economic policy issues in their campaigns to attract votes. In addition, while candidates utilized social meda in their campaigns hoping to maximize their voter outreach, doing so was not necessarily decisive in garnering more votes. Thus, juxtaposed with social meda channels like Twitter, Facebook, Instagram, YouTube, SnapChat, and GooglePlus, traditional campaigning strategies remained very potent. 相似文献
58.
59.
《Eurasian Geography and Economics》2013,54(6):698-707
In a framing comment embracing the preceding four papers devoted to the enlargement of the European Union in 2004, a prominent American geographer reviews some of the major problems confronting the European continent. The paper, which begins with the author's view of Europe's dilemma in late 2006, covers a number of geographic implications of the May 2004 expansion. Noted are Russia's overland access to Kaliningrad, the addition of ca. 8 million underprivileged Roma (presently the Union's largest minority population), the potentially divisive new boundary with Russia, the future candidate states emerging from the former Yugoslavia, the prospects of Ukraine's possible membership, and the challenge of Turkey's quest for admission to the EU. Journal of Economic Literature, Classification Numbers: F02, F20, P20. 2 figures, 34 references. 相似文献
60.