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The USS Emmons, a 106m US Navy Gleaves‐class destroyer minesweeper that sank in 40m of water off Okinawa Island, Japan after kamikaze attack in 1945, is used as a case study for examining the history, multivocal significance, and heritage management of a World War II naval battle site. A baseline record of the site was made using an innovative method incorporating precise control points obtained from high‐resolution multibeam echosounding bathymetry to generate 3D models using structure‐from‐motion photogrammetry. The 3D models produced can be used for sharing information about this underwater cultural heritage and for future in situ monitoring of the archaeological remains.  相似文献   
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The paper reports fish bone and shellfish assemblages from Ulong Island in the Rock Islands of Palau, western Micronesia dating from ∼3100 to 500 BP . Use of marine resources in early prehistory appears to have been highly localised with increasing capture of outer‐reef/pelagic taxa including shark and tuna after 1000 BP . Local stocks of large Tridacnids were depleted during initial human use of Ulong Island, and there is a size decrease in Scarus sp. remains consistent with pressure on the inshore fishery, especially after establishment of permanent stonework villages in late prehistory. Comparison of archaeological assemblages of fish bone from other Rock Islands dated to after 2000 BP indicate that the captured fish species and major capture methods differ between sites and likely reflect local marine environments at each location. Copyright © 2010 John Wiley & Sons, Ltd.  相似文献   
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本文是郭嵩焘和刘锡鸿政治思想的比较研究.笔者着重探讨在郭嵩焘和刘锡鸿的政治思想中最主要的问题意识是什么、这个问题意识和他们看到的西方有什么关系这类的课题.笔者想强调的是:第一,我们在他们出使之前的所有的文章中能看到他们的问题意识--"士大夫在那时的中国社会应该担负什么任务?"第二,他们从这个问题意识来观察西方社会,特别关注英国的"官"和"民"的关系.并且他们对英国政治的看法之间有思路的差别.  相似文献   
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Landform conservation is the main task of geomorphology in the 21st Century. Since landforms provide the templates for the development of wildlife habitats, landform change is likely to cause habitat loss, inducing a reduction of biodiversity. From the viewpoint of ‘geomorphic species’, specific landforms such as natural rivers, tidal flats and coral reefs are endangered species in the Japanese islands. To avoid the further destruction of natural rivers, environmentally appropriate flood control plans are necessary. The analysis of the Chitose Diversion Channel project in Hokkaido, Japan, revealed that (1) the construction of this diversion channel has caused not only environmental problems but also serious social conflicts relating to habitats within and beyond the drainage basin; (2) excavation of a deep channel changed the groundwater supply which previously supported a natural river system, and (3) selection of a very high discharge value as the target of flood control was the main reason for planning this project. From a landform conservation perspective, the method adopted in Japan is unsuitable because it does not incorporate the scientific procedure necessary for selecting the ‘best’ peak discharge corresponding to the target rainfall with a certain recurrence period. An alternative flood control plan, combining the selection of a lower peak discharge, construction of retention pools and the restoration of meandering river channels is proposed to avoid the further destruction of natural rivers.  相似文献   
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The Yarabuoki underwater site contains seven iron grapnel anchors and Early Modern Okinawan ceramic jars and is dated to the 16th–19th centuries. The site lies at a depth of 12–32 m off the western coast of Ishigaki Island in Okinawa, Japan. Based on underwater archaeological and broadband multibeam surveys, as well as historical research of the artefacts and Early Modern Ryukyuan shipping, we discuss the possible anchor and vessel types in Ryukyu and Eastern Asia in Early Modern times. We also discuss the efficacy of low‐cost ROV for assisting surveys in shallow‐water environments and the value of educational programmes for promoting the management and conservation of underwater cultural heritage.  相似文献   
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This short article report about the new findings of finely made dentate-stamped and lime infilled potteries from the Goa Topogaro site in Central Sulawesi, Indonesia. Most of them are red-slipped pottery decorated with dentate-stamped, lime infilled, and can be identified as burial potteries as they are excavated with secondly burials of the Early Metal Age possibly dated around 2000-1800 years ago. When comparing these finds with common decorative patterns seen in early dentate-stamped pottery assemblages in the Philippines, Mariana Islands, and early Lapita sites, the Topogaro dentate-stamped pots lack some common early patterns, but exhibit a wider variety of designs. It is now argued that dentate-stamped decorations at Lapita sites mainly disappeared by around 2800 BP or at least by 2000 BP in the Pacific, but the Topogaro dentate-stamped sherds may indicate that this pottery tradition continued and further developed in Island Southeast Asia or Sulawesi at least until the Early Metal Age. The detailed analysis of these new finds and further comparative study on production technique, variety of design, forms, and styles of both dentate-stamped ceramics in Southeast Asia and Oceania is required.  相似文献   
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William Charles Wells retained an interest in vision throughout his life. His first book was on single vision with two eyes; he integrated vision and eye movements to determine principles of visual direction. On the basis of experiments and observations he formulated three principles of visual direction, which can readily be demonstrated. In the course of these studies, he also examined visual acuity, accommodation and convergence, visual persistence, and visual vertigo. Insights into visual processing were mainly derived from observations of afterimages that were used to provide an index of how the eyes moved. His experiments enabled him to distinguish between the consequences of active and passive eye movements (later called outflow and inflow) as well as describing nystagmus following body rotation. After providing a brief account of Wells's life, his neglected research on vision is described and assessed.  相似文献   
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