Mapping Globalisation     

James H. Mittelman 《Singapore journal of tropical geography》2001,22(3):212-218

As a form of restructuring with new winners and losers, globalisation begets resistance, and these processes occur in particular places that have distinctive features. A map of globalisation may be drawn by showing the spaces of resistance, many of which are found at the local level, sometimes with transnational links involving formal or informal networks. To do so, one must first assess the variety of meanings that have been assigned to the concepts of globalisation and resistance. Noting shades of meaning from the natural sciences, medicine, history, philosophy, law, and feminist and other branches of social theory, this paper argues that different frames may be used in conjunction with one another to help explain Southeast Asia's diverse encounters with globalisation. The frames show that resistance is not merely a negation of the jarring effects of globalisation, but also a matter of imagining, in a non-utopian manner, something better. Remapping globalisation is a quest for an appropriate temporal and spatial scale of social organisation.  相似文献   

SMALL SCALE MORPHODYNAMICAL MODELLING     

D. Ditschke  O. Gothel  H. Weilbeer Institut Stromungsmechanik 《国际泥沙研究》2001,16(2)

1 INTRODUCTIONIn the vicinity of smictUres the local velocity of the flow increases, and three-dimensional effects occur,leading to higher shear stresses at the bottom. In case of a movable bed, sediment transport is enhanced.Erosion leads to a scour which can be dangerous for the stability of the strUctUre. The Predichon of a.maximum scour dePth is of vital imPortance for civil engineering. Generally, the maximum scour dePth iseshmated using an emPincal formula (Jolinson, l995). An a…  相似文献   

Stiff soil amplification effects in the 7 September 1999 Athens (Greece) earthquake     

G. D. Bouckovalas  G. P. Kouretzis 《Soil Dynamics and Earthquake Engineering》2001,21(8):671-687

The Athens, Greece, earthquake of 7 September 1999 provided a number of reliable strong motion recordings and well-defined patterns of damage at sites with known geological and geotechnical conditions. Joint evaluation of this evidence shows that the very stiff soils of the Athens basin, compared to the nearby outcropping soft rocks, have amplified the peak horizontal acceleration by an average of 40% or more and have shifted elastic response spectra to higher periods. US and the European seismic code provisions (NEHRP-97 and EC-8), place stiff soils and soft rocks at the same site category and consequently fail to predict these adverse effects. A larger number of site categories and new site coefficients that depend on the seismic excitation frequency appear necessary in order to overcome this deficit of the codes.  相似文献   

南极中山站和北京十三陵台标度值的讨论     

杨友华  汪阳 《地震地磁观测与研究》1995,16(5):54-57

通过处理南极中山站的地磁资料与北京十三陵台对比，发现在磁场扰动时，仪器的标度值Ｓ＝Ｈ×２Ｉ÷Ｎ有误差产生，提出了对中山站仪器标度值误差的改进方法。减少了误差，提高了资料的准确度。  相似文献   

植物冠层动量交换特征的实验研究   总被引：2，自引：1，他引：2       下载免费PDF全文

雷孝恩  田瑞明  韩志伟 《大气科学》1995,19(6):747-754

使用湍流梯度测试资料，对植物冠层动量交换特征进行了详细研究，结果表明:森林冠层内惯性副区能谱曲线仍可用幂指数描述，但斜率比-2/3更负；森林冠层内湍流尺度有变小的趋势；森林上层的耗散系数比下层大；由植被吸收引起动量及动量通量随冠层深度增加而明显减小；冠层下层的动量通量和耗散系数分别与上层的量有好的正相关；森林冠层内耗散系数和动量通量随大气稳定度有明显变化。  相似文献   

大尺度涡旋的正压不稳定   总被引：5，自引：4，他引：5  

罗哲贤 《气象学报》1995,53(3):281-288

用极坐标中线性化的正压涡度方程，将大尺度圆形基流上扰动的稳定性问题化为广义特征值的问题，得到了扰动振幅增长率沿方位角方向波数的关系。然后以不稳定模态的扰动流函数场作为初始场，在强、弱两类圆形基流的条件下，用直角坐标中准地转正压模式，分别实施积分时间为６０ｈ的试验。结果在模式大气中，初始扰动均随时间而增幅；强圆形基流的扰动增幅更快，并形成与台风螺旋云系看似有些相近的结构。  相似文献   

金顶集团矿区不良地质体遥感研究     

白志勇  黄素珍 《地质灾害与环境保护》1995,6(4):52-58

本文采用大比例尺彩红外航空遥感手段，研究了金顶集团石灰岩矿山边坡滑坡，崩塌和人工泥石流沟等不良好地质问题，通过不良地质体的形态特征，色调差异和堆积特点在航片上的不同反映，判释了不良地质体内的类型，分布，形成条件和严重程度，以及判释和分析了地形地貌，地层岩性，地质构造等工程地质条件及其对不良地质体的影响，为矿山的进一步开发，规划和边坡整治，提供了可靠依据。  相似文献   

Determining the spatial scale of variation in soil radon concentration     

M. A. Oliver  I. Badr 《Mathematical Geology》1995,27(8):893-922

Increasing concern about possible links between emissions of radon and certain types of malignant disease has led to local and regional surveys to measure radon concentrations in the soil and in dwellings. The spatial scale at which radon varies is largely unknown, and so efficient sampling schemes and methods of mapping cannot be selected. To determine the spatial scale of radon variation in the English Midlands we measured radon in the soil using solid-state nuclear track detection in three areas of different geological complexity. In two of them we used an unbalanced multistage sampling scheme with seven stages of nesting: the Hereford survey covered distances from 10 m to 7.5 km, and the Buxton survey distances from 1 m to 3.75 km. The results from the nested surveys suggested that geology exerts a strong control on the variation. Finally radon was measured every 20 m along a 2-km long transect which crossed several lithologies close to Nottingham. The soil radon values changed in an erratic way along the transect. The sample variogram of radon has a substantial nugget variance, suggesting that much of the variation occurred for distances less than the sampling interval. The structure at the longer scale seems to be controlled by the underlying geology. These results have implications for designing further surveys and for selecting a method of mapping. Stratification based on lithology might be the only feasible solution to sampling, estimating and mapping radon concentrations over large areas. Where the locally erratic component of variation is large, estimation by kriging, for example, would confer little additional benefit compared with that by classification.  相似文献   

激光质谱测定南极乔治王岛北海岸A635玄武岩微区~(40)Ar-~(39)Ar的等时年龄   总被引：1，自引：0，他引：1  

胡世玲  郑祥身  戴撞漠  蒲志平 《岩石学报》1995,11(3)

采用连续激光直接对岩石光片样品微区熔样，以高灵敏度、高精确度的质谱计测试，对南极乔治王岛玄武岩样品进行（４０）Ａｒ－（３９）Ａｒ法定年，取得了成功。样品置反应堆中心Ｅ－５孔道，以１．８×１０（１８）ｎ／ｃｍ２的快中子总通量照射，时间为５０ｈ，放射性冷却后进行测定。样品的加热源为自行设计的Ｎｄ：ＹＡＧ固体激光器，以Ｈｅ－Ｎｅ准激光器导光。测定中对４个２５０μｍ直径的微区分别在１５００℃高温熔融，经Ｚｒ－Ａｌ泵纯化的气体用ＭＭ１２００质谱计测量氩同位素各峰值。经计算得到该样品的等时年龄为５２．４±１．１Ｍａ，远远低于江个点的视年龄值，而（（４０）Ａｒ／（３６）Ａｒ）＞＞２９５．５。这不仅证明该样品含有过剩氩，同时也证明了由Ｋ－Ａｒ稀释法得到的偏高年龄值亦是样品中存在过剩氩造成的。激光微区等时年龄的获得进一步厘定了南极乔治王岛北海岸火山岩时代为第三纪，同时证明了我们建立的激光质谱微区、微粒熔样和测定技术是可行的和成功的。  相似文献   

岩石颗粒边界缺陷分布的概率模型   总被引：1，自引：0，他引：1  

王庚荪  袁建新 《岩土力学》1995,16(1):26-34

本文应用概率理论，研究了颗粒结构材料初始边界缺陷的分布问题，提出了一个概率模型，认为材料中的初始边界缺陷不会全部都是孤立地分布，总会有二个、三个或更多个基本边界缺陷相连在一起组成缺陷族的情况，缺陷簇的个数的数学期望值相对于其尺度符合指数衰减强度，衰减指数与缺陷发生的概率及边界网络的相似维数有关。推导得出了颗粒结构材料的拉伸强度与试样尺度、颗粒尺度及缺陷发生概率之间的关系，从理论上论证了材料强度的尺  相似文献