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《The Journal of geography》2012,111(5):205-213
Students in U.S. geography programs face particular challenges that may discourage them from taking advanced GIScience courses and considering geospatial careers. This article provides a preliminary discussion of the development, delivery, and evaluation of a University of Colorado Colorado Springs sophomore-level, required geography course designed to address this concern. The course, Digital Earth (DE), introduces students to the principles, concepts, and applications of major geographic information technologies (GITs) early in their academic careers. The success of DE is evaluated by examining the extent to which the course excited students about GIScience and motivated them to take higher level elective geospatial courses. Results suggest that DE generates considerable student interest in GIScience, prepares students reasonably well for elective courses, and greatly inspires them to seek a geospatial career. 相似文献
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沙漠化已是世界性的严重生态环境问题。沙漠化土地的整治是一门复杂的生态环境工程学科。中国沙漠化治理的成就和经验受到国际社会的重视, 中国科学院兰州沙漠研究所受国际组织委托为发展中国家举办了七期国际沙漠化治理讲习班, 取得了很好效果。当前发展中国家更需要对抗沙漠化的人才, 因此为对抗世界沙漠化培养人才的继续教育工程是当前一项迫切的任务, 期望得到国际社会的重视和支持。 相似文献
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Brazil seeks to rapidly increase its agricultural production to meet future demands, especially for sugarcane, which is an agricultural commodity and a biofuel source. In this paper, we explore how to achieve this increase without compromising existing forestlands. We propose that it is possible to substantially expand sugarcane production in Brazil while avoiding further environmental losses and the indirect land use changes often associated with them, such as deforestation. This task could be accomplished by converting existing pasturelands with agricultural potential into cropland. A great deal of pastureland exists in Brazil. Thus, we addressed the following questions in this study: (1) where are the most suitable pasturelands for sugarcane located geographically and (2) what potential do these pasturelands have for sugarcane production regarding their physical suitability and other significant factors, such as infrastructure availability and socioeconomic factors. We conducted a land suitability analysis using a spatial location model based on multicriteria decision-making and geographic information systems (GIS) to identify the cultivated pasturelands most suitable for conversion to sugarcane production in Brazil. “What if” scenarios were built to determine how changes in the subjectively derived weights of the priority criteria would modify the spatial distribution of the suitability classes relative to the MCDA model and demonstrate the robustness of the crop suitability assessment. The most suitable pastureland areas for conversion to sugarcane production were predominantly located in Minas Gerais, São Paulo, Paraná, Goiás, Mato Grosso do Sul, Mato Grosso and Pará. These zones have large contiguous areas of pasture with moderate and high agricultural potentials for sugarcane production. The total estimated area of cultivated pasturelands with moderate or high suitability for sugarcane production was 50 million hectares, which is much larger than the area currently used for sugarcane production in Brazil. 相似文献
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Takeshi Shirabe 《International journal of geographical information science》2014,28(2):314-325
This paper considers the problem of planning a path in a circumstance where its origin is given, but its destination is not specified and is to be selected from among a set of candidate destinations during a trip. A situation like this may be experienced by a group of people who have different preferred destinations, as well as by an individual who is simply indecisive about where to go. To resolve such an uncertainty, one may stay at the origin until he decides on a destination, or choose to proceed on some path that does not overly deviate from a shortest path, whichever destination is eventually chosen, and make a decision on the way. The latter action is sensible when the risk of traveling longer is outweighed by the benefit of buying more time for a better destination decision. The problem of finding such a time-buying path is formulated and a simple algorithm is developed for its solution. Some extensions and applications are also discussed. 相似文献
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《寒旱区科学》2014,(4):I0002-I0003
1. Aims and scope
Sciences in Cold and Arid Regions （SCAR） is a bimonthly journal that publishes in English the latest research achievements in processes and the pattems of the Earth surface system in cold and arid regions. Researches in cold regions emphasize particularly on the cold-region-characterized physical, 相似文献
Sciences in Cold and Arid Regions （SCAR） is a bimonthly journal that publishes in English the latest research achievements in processes and the pattems of the Earth surface system in cold and arid regions. Researches in cold regions emphasize particularly on the cold-region-characterized physical, 相似文献
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《寒旱区科学》2013,(5)
正1.Aims and scope Sciences in Cold and Arid Regions(SCAR)is a bimonthly journal that publishes in English the latest research achievements in processes and the patterns of the Earth surface system in cold and arid regions.Researches in cold regions emphasize particularly on the cold-region-characterized physical,chemical and biological processes and their interactions,and on the response of cryosphere to global change and human activities as well as their effects on environment and the acclimatizable strategies;focus on the objects of glacier,snow,river,lake,sea ice,permafrost and seasonal frozen ground,and periglacial geomorphology,etc.;and think much of cold regions 相似文献
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《寒旱区科学》2014,(3):I0002-I0003
1. Aims and scope Sciences in Cold and Arid Regions （SCAR） is a bimonthly journal that publishes in English the latest research achievements in processes and the patterns of the Earth surface system in cold and arid regions. Researches in cold regions emphasize particularly on the cold-region-characterized physical, chemical and biological processes and their interactions, and on the response of cryosphere to global change and human activities as well as their effects on environment and the acclimatizable strategies; focus on the objects of glacier, snow, river, lake, sea ice, permafrost and seasonal frozen ground, and periglacial geomorphology, etc.; 相似文献
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《The Professional geographer》2013,65(2):259-278
As the Internet continues to grow, questions of accessibility and infrastructure equity persist. In the increasingly competitive telecommunications industry, profit-seeking firms continue to upgrade infrastructure in select market areas creating an uneven spatial distribution of access opportunities. This article utilizes a longitudinal database of Internet infrastructure development, highlighting fiber-optic backbone points of presence (POP) established by commercial Internet service providers to examine city accessibility to the commercial Internet. Results indicate that many larger metropolitan areas maintain dominant shares of telecom infrastructure, but several midsized metros are emerging as important centers for telecommunication interconnection. 相似文献
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As the Internet continues to grow, questions of accessibility and infrastructure equity persist. In the increasingly competitive telecommunications industry, profit-seeking firms continue to upgrade infrastructure in select market areas creating an uneven spatial distribution of access opportunities. This article utilizes a longitudinal database of Internet infrastructure development, highlighting fiber-optic backbone points of presence (POP) established by commercial Internet service providers to examine city accessibility to the commercial Internet. Results indicate that many larger metropolitan areas maintain dominant shares of telecom infrastructure, but several midsized metros are emerging as important centers for telecommunication interconnection. 相似文献
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Modeling oil production is of interest to society and hotly debated. Often anomalies have occurred which makes modeling oil
production via a particular theory (e.g., Hubbert’s bell curve) difficult. The empirical method described here allows for
such historic anomalies to be incorporated while still using the underly theory. This method is explained using Hubbert’s
bell curve and Former Soviet Union oil production as an example. 相似文献
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《资源与生态学报(英文版)》2016,(1)
正1 About JoRE1.1 Aims and scope?Journal of Resources and Ecology(JoRE)is an international journal for the publication of recent work across the fields of natural resources science and ecology.JoRE was established in 2010 and is published quarterly.It will be published bimonthly from 2015 on.?The journal is indexed by BioOne,Chinese Science Citation Database(CSCD),China Academic Journal Network Publishing Database,Chinese Academic Journal Comprehensive Evaluation Database and Wanfang Data Digital Periodicals. 相似文献
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《资源与生态学报(英文版)》2015,(5)
<正>1 About JoRE1.1 Aims and scope·Journal of Resources and Ecology(JoRE)is an international journal for the publication of recent work across the fields of natural resources science and ecology.JoRE was established in 2010 and is published quarterly.It will be published bimonthly from 2015 on.·The journal is indexed by BioOne,Chinese Science Citation Database(CSCD).China Academic Journal Network Publishing Database,Chinese Academic Journal Comprehensive Evaluation Database and Wanfang Data Digital Periodicals. 相似文献
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