共查询到20条相似文献，搜索用时 24 毫秒
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《Norsk geografisk tidsskrift. Norwegian journal of geography》2012,66(3):181-182
Clout, H. D. 1974. Agricultural plot consolidation in the Auvergne region of Central France. Norsk geografisk Tidsskr. 28, 181–194. Plot consolidation has made great progress in the Paris Basin and has accentuated the agricultural contrast between northern innovation and southern backwardness. The Auvergne contains a wide range of agrarian structures, with environmental conditions being most favourable for farming in the lowland Limagnes. Detailed examination of Puy-de-Dôme département shows that most of the Limagnes have been consolidated, but little has been done in the uplands, which require other forms of structural change, including enlargement and re-afforestation. Plot consolidation is not a revolutionizing process since it cannot change land ownership, which is the ultimate constraint on its success. 相似文献
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Colin McClean 《International journal of geographical information science》2013,27(3):301-302
Nowadays, a huge quantity of information is stored in digital format. A great portion of this information is constituted by textual and unstructured documents, where geographical references are usually given by means of place names. A common problem with textual information retrieval is represented by polysemous words, that is, words can have more than one sense. This problem is present also in the geographical domain: place names may refer to different locations in the world. In this paper we investigate the use of our word sense disambiguation technique in the geographical domain, with the aim of resolving ambiguous place names. Our technique is based on WordNet conceptual density. Due to the lack of a reference corpus tagged with WordNet senses, we carried out the experiments over a set of 1,210 place names extracted from the SemCor corpus that we named GeoSemCor and made publicly available. We compared our method with the most‐frequent baseline and the enhanced‐Lesk method, which previously has not been tested in large contexts. The results show that a better precision can be achieved by using a small context (phrase level), whereas a greater coverage can be obtained by using large contexts (document level). The proposed method should be tested with other corpora, due to the fact that our experiments evidenced the excessive bias towards the most‐frequent sense of the GeoSemCor. 相似文献
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American Association of Petroleum Geologists Energy Minerals Division 《Natural Resources Research》2009,18(2):65-83
This paper summarizes five 2007–2008 resource commodity committee reports prepared by the Energy Minerals Division (EMD) of
the American Association of Petroleum Geologists. Current United States and global research and development activities related
to gas hydrates, gas shales, geothermal resources, oil sands, and uranium resources are included in this review. These commodity
reports were written to advise EMD leadership and membership of the current status of research and development of unconventional
energy resources. Unconventional energy resources are defined as those resources other than conventional oil and natural gas
that typically occur in sandstone and carbonate rocks. Gas hydrate resources are potentially enormous; however, production
technologies are still under development. Gas shale, geothermal, oil sand, and uranium resources are now increasing targets
of exploration and development, and are rapidly becoming important energy resources that will continue to be developed in
the future.
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《The Journal of geography》2012,111(1):37-38
Abstract Geography is one of the subjects offered toward a diploma of the International Baccalaureate Organization. Like the others, its syllabus is regularly reviewed and revised to remain current. The advent of a revised syllabus brings overlap that can be challenging for teachers. The syllabus that is now coming to an end was described in 107(4–5) of the Journal of Geography. The present article compares that syllabus with the new one and, particularly, the demands the new syllabus will place on teachers and students alike. 相似文献
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Richard Wadsworth 《International journal of geographical information science》2013,27(3):299-300
Urban segregation has received increasing attention in the literature due to the negative impacts that it has on urban populations. Indices of urban segregation are useful instruments for understanding the problem as well as for setting up public policies. The usefulness of spatial segregation indices depends on their ability to account for the spatial arrangement of population and to show how segregation varies across the city. This paper proposes global spatial indices of segregation that capture interaction among population groups at different scales. We also decompose the global indices to obtain local spatial indices of segregation, which enable visualization and exploration of segregation patterns. We propose the use of statistical tests to determine the significance of the indices. The proposed indices are illustrated using an artificial dataset and a case study of socio‐economic segregation in São José dos Campos (SP, Brazil). 相似文献
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ZHAO Xin 《地理学报(英文版)》2007,17(1):127-127
2006 Annual Academic Conference of China Society of Natural Resources （CSNR） was held on November 1-2 in Fuzhou, Fujian Province of Southeast China. This conference was co-sponsored by CSNR and Fujian Normal University. A total of some 360 researchers and educators from universities and institutions in mainland China participated in this conference. More than 210 papers were submitted and discussed during this academic conference. 相似文献
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Janice Monk 《The Professional geographer》2017,69(4):683-693
Histories of geography, especially those dealing with the twentieth century, tend to focus on geographic thought or academia rather than on practice in other arenas such as government agencies. In the United States during that period, however, the latter included a higher proportional representation of women professionals than did research-oriented universities. This article examines the careers of selected women geographers who had long-term and senior positions in Washington, DC, in agencies such as the Library of Congress, Bureau of the Census, the Department of State, and the Office of Naval Research. Drawing on sources including directories, the archives and oral history collections of the Society of Woman Geographers, and interviews conducted in the late 1980s and early 1990s, I explore four main themes: how these women came to government work, aspects of the intersections of personal and professional lives, ways in which economic and political contexts shaped their opportunities and experiences, and the nature of their contributions. 相似文献
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ZHAO Xin 《地理学报(英文版)》2007,17(4):511-511
The 2007 Annual Academic Conference of China Society of Natural Resources （CSNR） was held on July 28-30 in Xi＇an, Shaanxi Province of Northwest China. This conference was co-sponsored by CSNR and Shaanxi Normal University, and also supported by the Institute of Geographic Sciences and Natural Resources Research. A total of more than 500 scholars from over 140 universities, institutions and the government departments concerned in mainland China participated in this conference.[第一段] 相似文献
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《The Professional geographer》2013,65(2):196-209
Recent research on the role of public capital in the economy focuses primarily on assessing its economic, and sometimes spatial economic, impacts. Access to more detailed and disaggregate data than typically used in these analyses allows us to take a fresh perspective on the often conflicting goals of interregional equity and aggregate efficiency. Using the state of Ohio as a case study, and classic definitions of equity and efficiency, we assess the correspondence between distributions of infrastructure investment and the social/economic distress they are intended to alleviate. Traditional map and statistical analysis combined with a graphical device we call the variegated distribution plot reveals that, in both rates and levels, investment is highest in areas of greatest distress. Both patterns are consistent with equity-driven investment distributions. 相似文献
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Although there have been noticeable improvements in recent years, geography continues to be a predominantly male discipline. The percentage of women receiving PhDs in geography has tracked lower than the U.S. average of female PhDs. Previous studies of women's contribution to geography have focused on personal accounts or on the study of some of the most prominent practitioners, with a few studies using basic data on PhDs awarded and Association of American Geographers membership to determine trends. This article provides a comprehensive overview of doctoral degrees in geography by gender, over time, and across all universities in the United States by examining an alternative database, that of doctoral dissertations. The analysis yields three separate types of results. First, historical and contemporary variations among U.S. universities are examined. Second, data indicate that male and female doctoral students differ in the sex of their advisor. Third, a simple regression model explains some of the discrepancies in the proportion of female doctoral students by department. In sum, this article provides a comprehensive empirical study of the factors that might contribute to the continued disparities in female doctoral students in geography. 相似文献