Frictional contact of laminated elastic half‐spaces allowing interface cavities. Part 1: Analytical treatment     

A. A. Kryshtafovych  S. J. Matysiak 《国际地质力学数值与分析法杂志》2001,25(11):1077-1088

The paper deals with the plane problem on frictional contact of stratified elastic half‐spaces provided discontinuity of their direct touch. Imperfectness of contact of the bodies is assumed to be caused by surface unevenness of their surface layers. The problem is formulated within the framework of the homogenized model with microlocal parameters. Using the method of complex potentials in combination with the method of interface gaps the problem is reduced to a singular integral equation on the function of interface gap height. Copyright © 2001 John Wiley & Sons, Ltd.  相似文献   

Migration and gender identity among Chinese skilled male migrants to Australia     

Ray Hibbins 《Geoforum》2005,36(2):167-180

This paper reports on a study of the effects of migration on constructions of masculinities among Chinese skilled male migrants to Australia over the past 50 years. Data were collected in in-depth, semi-structured interviews of a sample of 40 Chinese male migrants in Brisbane city. The respondents came from a variety of countries of origin and varied in marital status, sexuality, age and previous migration experiences as well as duration of settlement in Australia. Because of an immigration policy based on a points system for measuring skill potential among migrants, these informants were of middle to upper-middle socio-economic status. Core ideas which emerged from the study included: Chineseness; insularity; the centrality of family, kin and friendship networks; Chinese males in the workplace; the division of labour in the household; employment and the fears of unemployment. These Chinese skilled male migrants displayed qualities of hegemonic masculinity in their households where traditional Chinese division of labour persisted. The markers of masculinity included: centrality of work and education; being a successful provider and protector; the accumulation of wealth and power. Unlike local hegemonic variants of masculinity these males placed little emphasis on sport, sexual prowess and performance and alcohol consumption. There were no ambitions among this sample of males to model local variants of masculinities, however gay males in the sample while experiencing marginalisation, racism and homophobic behaviour at the hands of local hegemonically masculine males, were more like the local dominant males in terms of an emphasis on sexual performance and preferences for well-muscled and fit bodies. Gay males in the Chinese sample found it necessary to restrict their social circles and physical locales. This Australian study has demonstrated the importance of the cultural sensitivity of concepts in doing comparative studies, and of considering sexuality as a dimension of identity in migration research that seems to assume a heteronormativity in its samples.  相似文献   

The liminality of training spaces: Places of private/public transitions     

Susan Buckingham  Elodie Marandet  Fiona Smith  Emma Wainwright  Marilyn Diosi 《Geoforum》2006,37(6):895-905

This paper draws upon research, conducted for the London West Learning and Skills Council, on the training experiences of women with dependent children. One of the striking revelations of the research, we suggest, is the way in which training spaces are used and perceived by women, which are often at odds with government intentions. To help make sense of women’s use of, and motivation for, training we utilise the concept of ‘liminality’ and the private/public imbrication to explain the ways in which women use, or are discouraged from using, training spaces. Further, how the varied and multiple uses women in our research have put training to in their own lives has encouraged us to rethink the relationship between the private and the public more generally. In the light of this, we suggest that training and the places in which training take place, have been neglected processes and spaces within feminist geography and might usefully be explored further to add to an extensive literature on women’s caring and domestic roles and their role in the paid workplace.  相似文献   

行为主义政治地理学研究展望     

王丰龙  刘云刚 《地理研究》2022,41(6):1765-1777

目前,国内政治地理学研究以引自西方的外生理论和偏重政治结构的静态视角为主。引入行为主义视角不仅能够强化对政治地理行为的理解和政治地理过程与机理的解释,而且能为政治地理学的学科发展做出“中国贡献”。为此,本文总结行为主义政治地理学的研究对象、研究视角和理论基础,提出行为主义政治地理学的理论框架和研究议题。具体而言：行为主义政治地理学的研究对象主要包括地理环境、政治制度/权力关系和政治主体的政治行为、环境认知和情感/态度;其视角强调对微观机制的分析、偏重可检验的规律总结和对人们主观因素的考量;行为主义政治学、政治哲学、行为地理学、情感地理学、政治心理学等相关学科的理论和方法为行为主义政治地理学研究提供了重要基础和参考;决策空间是行为主义政治地理学理论框架中的核心概念,未来研究可以深入考察地理环境对政治行为的直接影响、情感在地理环境与政治行为关系中的中介作用和基于情感的政治行动合法性建构策略。  相似文献   

基于变异函数的多波束抽稀间距确定方法     

张志伟  肖付民  夏伟  李浩 《海洋测绘》2013,33(1):43-45

在格网化抽稀方法中,抽稀间距的选取直接影响多波束测深数据抽稀结果和构建海底地形的表征能力。为了合理确定多波束测深数据抽稀间距,将地质统计学中的变异函数理论引入到多波束测深数据抽稀中,由水深变异函数估计海底DEM的精度,得出海底DEM精度与抽稀间距的关系。通过仿真计算表明:如果给定海底DEM的精度,再依据计算得到的拟合水深变异函数参数值,即可确定多波束测深数据抽稀网格间距的大小,该法适用于多波束测深数据抽稀的应用中。  相似文献   

The politics of identity: Ethnicity, minority and nationalism in Soviet Estonia     

Joni Virkkunen 《GeoJournal》1999,48(2):83-89

Identity has become one of the core concepts of political geography. This reflects the wide recognition of a post-structural conception of society and space, as well as the acknowledgement of the political character of identity. The present article focuses on the politics of identity, and discusses the politicized forms of identity as related to the Soviet state building policies and the Estonian spaces of resistance. It will be argued that neither identity nor the political demand in Soviet Estonia can be viewed in isolation from their historical and social contexts. Both Soviet state politics and the Estonian spaces of resistance reflected the prevailing conceptions of past and the contemporary political realities. This article examines those preconceptions of the political and territorial development in Soviet Estonia, and also illustrates the interdependent character of state politics and non-state activism. The first part of the article concentrates on the Soviet state building practices – the use of power, symbols, education – and the second part examines the various forms of non-state activism of Estonians.  相似文献   

Urban water systems under climate stress: An isotopic perspective from Berlin,Germany     

Lena-Marie Kuhlemann  Doerthe Tetzlaff  Chris Soulsby 《水文研究》2020,34(18):3758-3776

Large urban areas are typically characterized by a mosaic of different land uses, with contrasting mixes of impermeable and permeable surfaces that alter “green” and “blue” water flux partitioning. Understanding water partitioning in such heterogeneous environments is challenging but crucial for maintaining a sustainable water management during future challenges of increasing urbanization and climate warming. Stable isotopes in water have outstanding potential to trace the partitioning of rainfall along different flow paths and identify surface water sources. While isotope studies are an established method in many experimental catchments, surprisingly few studies have been conducted in urban environments. Here, we performed synoptic sampling of isotopes in precipitation, surface water and groundwater across the complex city landscape of Berlin, Germany, for a large -scale overview of the spatio-temporal dynamics of urban water cycling. By integrating stable isotopes of water with other hydrogeochemical tracers we were able to identify contributions of groundwater, surface runoff during storm events and effluent discharge on streams with variable degrees of urbanization. We could also assess the influence of summer evaporation on the larger Spree and Havel rivers and local wetlands during the exceptionally warm and dry summers of 2018 and 2019. Our results demonstrate that using stable isotopes and hydrogeochemical data in urban areas has great potential to improve our understanding of water partitioning in complex, anthropogenically-affected landscapes. This can help to address research priorities needed to tackle future challenges in cities, including the deterioration of water quality and increasing water scarcity driven by climate warming, by improving the understanding of time-variant rainfall-runoff behaviour of urban streams, incorporating field data into ecohydrological models, and better quantifying urban evapotranspiration and groundwater recharge.  相似文献