首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 390 毫秒
1.
ABSTRACT. The first half of the twentieth century marked both an end to confidence in human control of the earth and a prelude to the contemporary era of intense environmental concern after 1950. This conspectus of the environmental history/historical geography of the transitional years between 1900 and 1950 focuses on rising concerns over resource supplies and exploitation, particularly land settlement, timber supplies, soil erosion, and river-basin control. Conservation and the pervasiveness of ecological thinking and analogy form a strong underlying theme.  相似文献   

2.
Taking the late Ottoman port and boomtown of Smyrna/Izmir as a case study, I interrogate a priori concepts of cosmopolitanism in historical studies, choosing to be “archivally cosmopolitan” by working from the ground up to interpret primary sources for what they can illuminate about social complexities in the imperial port. A view from the hinterland, well studied as the agricultural economic base of Izmir, presents an Ottoman cultural geography that embraces the city and complicates its “Europeanized” image. A mainstay of daily life—music—reflects this cultural intermixing as well as the social stratification of an entertainment world, a dimension often filtered out of maritime, progressive, Eurocentric historiographies. Recovering stories from inland urban space, I aim to contribute to a dialogue about cosmopolitanism and the extent to which its commonplace usage obscures cultural histories.  相似文献   

3.
Editors' note: Larry lost his battle against pancreatic cancer in September 2009. When we invited him, some months before his death, to prepare this essay he eagerly agreed, despite his worsening health. We acknowledge with gratitude his longtime service as a member of the Geographical Review Editorial Board, as a Councilor of the American Geographical Society, and as a professor of geography at San Diego State University. In many ways he was himself an inspiration.  相似文献   

4.
This article examines linkages between recent domestic out-migration from immigrant gateway metropolitan areas and nonmetropolitan migration gains, based on data of the 1990 census, 1996 Current Population Survey, and population estimates for the 1990–1996 period from the Bureau of Census. Our analysis of these data suggests that there is a mirror image of migration patterns between high immigration metropolitan area losses and nonmetropolitan area gains. This is especially evident in the West with the relationship between Los Angeles and San Francisco areas' losses on the one hand, and the region's nonmetropolitan gains on the other. While pre-elderly and elderly retirees have contributed to these nonmetropolitan gains, much of it is attributable to the destination choices of suburban-like populations—Whites with children, not college educated, and with lower incomes—that have been leaving high immigration metropolitan areas. This new, more dispersed form of “White flight” holds the potential for reinvigorating smaller, nonmetropolitan communities, but creating, as well, new demographic divisions across space.  相似文献   

5.
Michal Lyons  John Simister 《Area》2000,32(3):271-285
Summary In 1971 under half of London's young people, then living with their parents, lived in households that owned their homes, while well over half lived in rented housing. By 1991, now no longer living with their parents, less than a quarter of these young people were tenants. This paper identifies the components of that intergenerational tenure mobility, distinguishing between home ownership in more, and less, 'desirable' wards, and quantifies the role of migration in mediating the overall changes in Londoner's housing market status between 1971 and 1991. It analyses the moderating factors contributing to housing status mobility, such as labour market mobility and household type, and assesses the differential impact of these processes on men and women. ONS Longitudinal Study data for the period 1971–91 are analysed. Findings are that the aggregate changes concealed a range of housing careers. In particular, in-migrants fared less well in the London housing market than in its labour market.  相似文献   

6.
ABSTRACT

What is successful migration? At a macro-socio-political level migration by individuals may appear to be successful when it has met the objectives of governments, industries and domestic profit makers. However, delving beneath the surface can reveal contradictions and other measures of success at the individual, or micro-level. Within a broader critical historical ethnography, we interviewed 26 post-World War 2 (WW2) British migrants living in South Australia. All interviewees could be viewed as successful at the macro-level, having remained in Australia for many years and having established multi-generational Australian families. Their migration was a ‘success’ when measured against the priorities that were actively promoted by Australian governments in the post-WW2 period. At a micro-level, the migrants involved in this study reported mixed outcomes. While migration did result in self-identified aims of migration including employment, opportunities and adventure, some migrants reported high levels of distress and longing, linked to loss and dislocation from people and places in geographically distant locales. For some, these feelings extended into the present, raising questions over the ‘success’ of their migration experiences at a personal level. We argue that pro-active migration recruitment—such as that undertaken by Australian governments in the post-WW2 period—has the potential to pressure some persons into migration, creating ongoing and unresolvable tensions. Experiences of such disruptions merit further exploration to develop deeper critical understandings of migration success.  相似文献   

7.
"This paper focuses on pre-elderly (ages 55-64) net migration in the United States for the period 1980-90, to explore the hypothesis that there exists a ?retirement transition' that characterizes pre-elderly migration.... This research uses ordinary least squares regression to compare the effects of demographic, economic, and amenity factors on county-level net migration rates for five age groups: the young (25-44), the middle-aged (45-54), the pre-elderly (55-64), the young-old (65-74), and the old-old (75+). Pre-elderly migration patterns emerge as distinct from those of both younger and older age groups. Their net migration patterns are not fully shaped by labour force considerations. At the same time, pre-elderly migration appears to be driven by factors beyond retirement. These findings are discussed in the context of life-course change and their implications for the ageing baby-boom cohorts [considered]."  相似文献   

8.
本项研究选取柴达木盆地尕斯库勒盐湖区作为研究区,筛选出了9种优势盐生植物,开展了盐生植物生长区土体颗粒、容重、含水量等物理性质指标,以及土体中HCO<sub>3</sub><sub><sup>-</sup></sub>、Cl<sub><sup>-</sup></sub>、SO<sub>4</sub><sub><sup>2-</sup></sub>、K<sub><sup>+</sup></sub>、Na<sub><sup>+</sup></sub>、Ca<sub><sup>2+</sup></sub>和Mg<sub><sup>2+ </sup></sub>7种易溶盐离子含量试验测试,分析了区内芦苇、海韭菜等9种盐生植物茎叶和根系部分HCO<sub>3</sub><sub><sup>-</sup></sub>、Cl<sub><sup>-</sup></sub>等7种易溶盐离子含量及其分布规律。在此基础上,探讨了区内9种盐生植物对易溶盐离子吸收作用及其差异性;采用盐生植物地上茎叶部分K<sub><sup>+</sup></sub>/Na<sub><sup>+</sup></sub>值结果,定量评价了区内9种盐生植物耐盐性及变化规律,结果表明,区内9种盐生植物茎叶部分K<sub><sup>+</sup></sub>/Na<sub><sup>+</sup></sub>比值,其由大至小依次为:小花棘豆0.84、羊齿天门冬0.58、白刺0.55、盐地风毛菊0.52、海韭菜0.50、无脉苔草0.47、洽草0.41、芦苇0.39和赖草0.34。本项研究结果,利用为尕斯库勒湖区及其周边地区,利用盐生植物有效改良土壤盐渍化方面提供理论支撑。  相似文献   

9.
Abstract

Commuting in Italy has always been addressed without regard to gender differences. Following the issuance of a comprehensive database by the National Statistical Institute, it is now possible to analyze gender differences in personal mobility for the first time in Italy. For our analyses we used Local Labor Systems (LLS) zoning in lieu of administrative zoning. LLSs are territorial subdivisions based on the principle of a self-contained labor market and are widely used in Italy. This article also reports the results of a multidimensional data analysis aimed at highlighting relations between different gender-based commuting patterns and a set of variables (education level, age, household structure, occupational category, and position, etc.). The analysis points out gender differences in the relationship among commuting and socioeconomic characteristics, reveals that these relationships are in turn related to the economic structure and geographical context of different regional labor markets, and suggests to analysts that they be sensitive to singular context when interpreting the meaning of gender differences in commuting.

  相似文献   

10.
In the past decade, international development practitioners have increasingly argued that migration improves the food security of households at origin, by providing the capital necessary for agricultural intensification or food purchase. These debates have occurred largely in isolation from a discussion of the values that underpin food production and consumption in the communities that migrants call home. We question the assumption that a shift from an agricultural-based economy to an economy based on remittances increases the ability of communities to secure access to food in the face of rapid economic and cultural change. In this paper, we present two independently conducted studies from Nepal and Vanuatu that investigate the impact of out-migration on local perceptions of agricultural and residential land and the meaning given to food security. Our data reveal that the value changes associated with large-scale out-migration have the potential to make the agricultural sector at origin more vulnerable, unproductive, unsustainable or unattractive, leaving a longer-term impact on food security. We offer some reflections on the implications of these findings for the structure of the migration–food security nexus.  相似文献   

11.
“厄尼诺”(英文El Nino,俄文)是西班牙语El Nin(?)的音译。El是定冠词,可不译,所以也有译作“尼诺”的。Nino为名词,小孩之意,在这里指的是神之子即耶稣。  相似文献   

12.
13.
Many migration studies describe various counties by adopting a priori county typologies, such as the U.S. Department of Agriculture Economic Research Service county typology, which might not be suitable for identifying different age migration patterns of the U.S. counties. This study employs a spatial clustering method that exhaustively compares all U.S. counties on their age migration similarity and spatial proximity to investigate signature age-specific net migration profiles across six decades of U.S. county age-specific net migration data from 1950 to 2010. All of the six-decade data are integrated into a common spatial county boundary on which counties below a population threshold are merged with the nearest county to mitigate the small population problem in net migration rates. As counties are merged by increasing large population thresholds, the Getis-Ord Gi* spatial autocorrelation statistic is applied to examine how the spatial migration patterns are affected. It is found that U.S. county age-specific net migration profiles exhibit four signature patterns. Although these patterns are persistent across the past six decades, their spatial distributions have experienced dramatic variation. The small population problem in net migration rates affects the extent and location of the significant spatial migration patterns.  相似文献   

14.
“数字地球”的启示   总被引:1,自引:0,他引:1  
本文分析了“数字地球”这一全球战略思想带给我们的一些启示 ,这些启示包括 :战略眼光 ,大国地位 ,自主发展和技术引进 ,盲目追随、整合的意义等。笔者认为 ,宏观的、全局性的战略眼光 ,冷静思考与明确的目标 ,紧抓对地观测和国家基础信息设施建设以维护中国作为大国的形象和利益 ,在发展“数字中国”过程中走自主发展与技术引进相结合的道路 ,以及加强行政管理机制、智能化数据、科研机构和学科领域的整合 ,是我们在数字地球的挑战面前应有的基本思路。  相似文献   

15.
在国家自然科学基金委和教育部共同资助下,由顾朝林、于涛方、李王鸣等数十位中青年专家通力合作完成的巨著——《中国城市化格局·过程·机理》已由科学出版社出版。该书是迄今为止中国城市化领域难得见到的内容丰富、基础性较强、理论和方法有创意的科学专著。  相似文献   

16.
17.
The characteristic features of the transformation of the territorial geospace structure in the African Christianity religious geospace during 1910–2010 have been revealed. African countries within the boundaries of 2010 are used as territorial cells that have been fixed retrospectively over the course of the period analyzed. We used indicators, such as Ryabtsev’s index of relative structural shifts and the trajectory of the demographic center of the Christianity to assess changes in the inertia level of the territorial structure for the entire time interval as a whole and for each of the components of its 20-year long periods. It is found that to date the adherents of Christianity are extremely unevenly distributed in the countries of Africa; however, over the course of the period under consideration there was taking place a homogenization of their settlement. In accordance with changes of the values of the indicators used, we identified two development stages of geospace of African Christianity: colonial and post-colonial. It is determined that the colonial stage (1910–1970) is characterized by a “compression” of territorial structure from east and north, and by a predominance of the south-westward direction of movement of the demographic center because of a decrease in the proportion in the Christian population of East Africa first on account of Egypt and Ethiopia and Madagascar (1910–1930) and then North Africa on account of Egypt and Algeria (1930–1950). The territorial structure of Christianity’s geospace during the post-colonial stage is characterized by a higher degree of inertia at the background of the westward ”expansion” and the “compression” from the south as well as by a change of the vector of movement of the demographic center for north-westward.  相似文献   

18.
假若你打开南极亚力山大一世岛的地图,就会发现有50多位世界著名作曲家的名字被命名为地名。例如最大的半岛叫贝多芬岛。岛上有莫扎特、巴赫冰川,有李斯特,格里格、拉夫尔、施特劳斯山峰。  相似文献   

19.
20.
中国地理学家们对中国城市发展的研究,早在20世纪20年代就已开始,但城市地理学在中国成为一门系统性的研究及教学领域,则是在改革开放之后才出现的。在计划经济时代,城市主要是社会主义工业化的载体(西方称之为“空间容器”),是为工业化服务的,城市本身在全国经济及社会中未能扮演重要角色,城市地理这门学问也还不存在。在改革开放后的30年中,城市地理学在中国出现后成长神速,  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号