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126 postglacial catastrophic rock-slope failures (PRSFs) and 66 debris-free failure scarps (DFFSs) were identified using Google Earth? imagery on Lewisian Gneiss (LG), Torridon Sandstone (TS), Cambrian Quartzite (CQ) and Moine Schist (MS) terrains in NW Scotland. Normalisation of these data for area and gradient shows that RSF density on slopes ≥25° decreases in the sequence MS?>?LG?≈?CQ?>?TS. Most are apparently discordant with structure, suggesting that failure along slope-(sub)parallel joints was more common than failure along bedding or foliation planes. DFFSs represent failure scars from which runout debris has been removed by later glaciation. Eighteen were recorded outside the limits of the Loch Lomond Readvance, implying that they survived the last ice-sheet glaciation, and support the view that many steep upper rock slopes have been dominated by gravity-driven rock detachment rather than glacial erosion. We argue that many RSFs were probably triggered by Lateglacial earthquakes due to fault (re)activation by crustal rebound, as 74% of recorded PRSFs and DFFSs are located at or near slope crests. 44% of recorded PRSFs and DFFSs occur in cirques, suggesting that cirque enlargement during successive glacial-interglacial cycles involved deepening by glacial erosion, headwall retreat by rock-slope failure and removal of RSF debris during subsequent glaciation.  相似文献   

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改革开放20多年来,中国的经济一直保持了高速增长势头,国外关注中国问题的热度也在不断升温.在这新一轮“中国热”中,有关中国的报道、评论和研究成果大量涌现.随着改革开放的不断展开,经济、社会乃至政治后果都越来越清楚地显现出来,人们的评价和看法逐渐从早期倾向于依据政府意图、改革计划和发展预测做出判断,转向依据事实和后果做出判断.当然,并不是说这些看法越来越趋于一致.事实上,可能正相反.正如在国内一样,由于判断标准不同,立场、出发点不同,国外的看法同样众说纷纭、莫衷一是.与此同时,由于各种因素使然,国外不少看法不乏独到见解,有一些研究结论更加直截了当.这些,对我们认识自己的国情不无积极意义.笔者选择以下几方面归纳一些有代表性的看法,并在适当的地方进行简要评论.  相似文献   

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Between 1938 and 1956, an estimated 1,147 children were sent from the United Kingdom to Australia through child migration initiatives delivered by Catholic organisations. Whilst experiences of child migrants varied, there has been a growing public recognition over the past thirty years of the trauma experienced by many. Although the suffering of child migrants occurred in the context of wider policy failures, this article argues that there was a particular pattern of systemic failures characteristic of these Catholic schemes. After providing an overview of the complex organisational structure through which Catholic child migration operated, the article identifies six systemic failures in this work relating both to organisational processes and the institutional conditions to which child migrants were sent. It goes on to argue that these occurred in a framework of religious legitimation which emphasised the unique role of the church as a mediator of salvation, the need to safeguard children's faith, the child as a member of a corporate body more than as an individual and the relative moral authority of the church over secular institutions. Within this framework, these systemic failures were either unrecognised or seen as tolerable in the context of wider organisational and theological priorities.  相似文献   

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This paper seeks to answer the question why there is no central market on the Polynesian island Wallis, and relates the answer to indigenous representations of work and to cultural constraints on leadership. The title of this paper ‐ Selling is Poverty, Buying a Shame ‐ contains the answer in a nutshell, requires contextualisation in relation to the main cultural, socioeconomic and political features of the society on this island. More specifically, it raises the following questions: What do we mean when we speak about a market? Have there been markets in the past? Are there (other) market‐like structures today? And what do we mean by representations of work?  相似文献   

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空间信息技术近年来在文化遗产保护领域发挥了巨大的作用,在大遗址、运河遗产、长城资源等文化遗产调查、保护和管理中得到了广泛的应用.茶马古道作为特殊的线性文化遗产,所经之处受自然环境和地理条件的影响,对其保护和调查都存在很大的难度.而空间信息技术由于其全天时、全天候、覆盖范围广、信息化程度高、不需要人亲临现场的特点,在文化资源调查和管理中发挥巨大的作用,可以适应这一特殊要求.本文通过对茶马古道在保护和规划中对空间信息技术的需求进行了分析,探讨了空间信息技术在茶马古道文化遗产资源的调查、保护、规划及管理中的应用.  相似文献   

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九寨沟旅游高峰期游客时空分布不均,直接造成三个方面的负面影响。一是各界对九寨沟景区严格实行游客限量的诉求增强,二是景区生态环境保护压力加大,三是游客满意度降低。本文在管理熵理论的指导下,拟采用RFID、eB和3S等信息技术,在时间和空间两个维度上对景区游客进行科学分流设计,建立游客高峰期时空分流导航管理模型,以期降低景区景点瞬时负荷,均衡游客时空分布,同步实现景区游客容量增加、环境保护水平提升、游客满意度增大三个目的。  相似文献   

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Public policies (often at the regional level) favouring pre-competitive research and cooperative research and development have played a decisive role in the development of technology centres in Europe and all over the world. The technology offer model gave priority to the creation of technology transfer organizations and structures, but there is increasing evidence that this model did not attach enough attention to the needs of small- and medium-sized companies (SMEs) and in particular, to their capacity to take in knowledge. In this paper, based on qualitative research, we show in detail some of the main issues involved in the relationships between technology centres and SMEs in the Basque Country, a region that has developed intensive policies favouring technology transfer organizations over the years.  相似文献   

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The present study aims to understand the reasons for the visual differences of black gloss pottery found in northern Etruria. The results obtained by conventional (scanning electron microscope, electron microprobe) and synchrotron (X‐ray diffraction, X‐ray absorption spectroscopy) techniques indicate that the thickness, porosity or chemical composition of the different types of gloss cannot be used as the principal distinguishing factor. The size of quartz or feldspar crystals may well be a critical factor responsible for the matt effect in some samples, while the range of mixtures of iron compounds indicated by XRD and XAS could be the reason for differences in colour and reflectivity. The Fe L‐edge XAS results in particular show that a correlation does exist between the oxidation state characteristics and the visual appearance. The Si, Fe and Al contents seem to further discriminate the different types of gloss that have differing visual appearances.  相似文献   

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李浪林 《华夏考古》2002,(1):98-105
(编者按 :中山大学人类学系为庆祝该系于 2 0 0 1年复办 2 0周年 ,举行了系列学术讲座。 2 0 0 1年 6月 6日 ,香港古物古迹办事处考古学家李浪林先生应邀作了题为“英国考古的政策、管理和操作”的演讲 ,演讲之后回答了该系师生的提问。李浪林先生早年就读于伦敦大学考古学院 ,获硕士学位 ,最近又受香港政府的派遣 ,到英国伦敦博物馆、肯特郡政府和英格兰文物局等机构进修和考察 ,系统地了解了英国最新的考古政策、管理 ,田野考古发掘的方法和技术。今将李浪林先生演讲和回答问题的内容整理出来 ,以飨读者 ,相信该文对国内的考古政策、发掘管理和研究 ,都会有一定的借鉴意义。因该文未经本人审阅 ,疏漏由整理者负责。)  相似文献   

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J. R. HARRIS. Industrial Espionage and Technology Transfer: Britain and France in the Eighteenth Century. Aldershot and Brookfield: Ashgate, 1998. Pp. xvii, 655. $110.95 (US). Reviewed by John Money  相似文献   

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