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 15 毫秒
1.
Recently developed modules in GRASS GIS combine a wide variety of spatial data such as climatic, geological, and cultural in order to estimate how long-term interactions among these factors contribute to the evolution of natural environment and anthropogenic landscapes. Additionally, these modules allow users to visualize anthropogenic impacts of extensive agropastoralism on landscapes by subjecting the pre-defined catchment areas to repeated land use activities. The results emphasize the economic and ecological value of extensive agropastoralism in the marginal landscapes, which make anthropogenic activities more sustainable in the long-term. The results of this research are not only significant for its methodological contributions in anthropological archaeology but also have broader significance for researchers interested in interdisciplinary approaches in assessing the long-term dynamics of human-environment relations.  相似文献   

2.
Is urbanization good for the environment? This paper establishes a simple core–periphery model with monocentric cities, which comprises key forces that shape the structure and interrelation of cities to study the impact of the urban evolution on the environment. We focus on global warming and the potential of unfettered market forces to economize on emissions. The model parameters are chosen to match the dichotomy between average “large” and “small” cities in the urban geography of the United States, and the sectoral greenhouse gas emissions recorded for the United States. Based on numerical analyzes we find that a forced switch to a system with equally sized cities reduces total emissions. Second, any city driver which pronounces the asymmetry between the core and the periphery drives up emissions in the total city system, too, and the endogenous adjustment of the urban system accounts for the bulk of the change in emissions. Third, none of the city drivers gives rise to an urban environmental Kuznets curve according to our numerical simulations. Finally, the welfare‐maximizing allocation tends to involve dispersion of cities and the more so the higher is the marginal damage from pollution.  相似文献   

3.
ABSTRACT

In the years between 1880 and 1920, tens of thousands of Irishmen and women played sport in Ireland. Some lived to play, others dabbled as they desired; some devoted their lives to one sport, others sought to participate in as many sports as they could. This article examines what motivated people to join the expanding world of clubs and associations, of matches and races. It assesses why they joined the particular clubs and associations that they joined, or played the particular games that they played. Further, the article explores how such choices were defined (or refined) by such factors as the influence of ideology and tradition, class and gender, commerce and geography, education and employment. Ultimately, it considers the extent to which the sporting choices of people were shaped by the straightforward pursuit of pleasure.  相似文献   

4.
This paper analyzes the introduction and development of irrigation agriculture in the lower Bow River region, Alberta, Canada. Sponsored by the Canadian Pacific Railroad (CPR) and the Canadian federal government, irrigation promised to transform semi-arid prairie into a densely settled countryside. After 1900, a mixture of policies and practices pioneered elsewhere were deployed to create the largest irrigation project of its kind in North America. Settlers faced difficult economic conditions, however, and fell into conflict with the CPR. The system as a whole experienced a range of environmental changes as irrigation water altered the land and produced new conditions for flora and fauna. By 1930, the irrigation project experienced high levels of settler abandonment and deep fiscal problems. The circumstances of the Bow River case suggest the particular qualities of social and environmental changes initiated by irrigation agriculture in the Canadian prairies, but they also provide the basis to consider comparatively the processes and difficulties attending irrigation expansion in the late nineteenth and early twentieth century world.  相似文献   

5.
6.
Stable isotope analyses of faunal remains provide valuable information about human–environment interactions in the past, including insights into past animal husbandry and land management strategies. Here, we report stable carbon (δ13C) and nitrogen (δ15N) isotope values of collagen and carbonate from archaeological fauna from Ka?dus, a medieval settlement in North-Central Poland, to better understand human–environment interactions during a period of increasing urbanism and marketization. Wild and domestic animals can be separated on the basis of their isotopic values. The mean δ15N value for 12 domesticated animals is 7.6 ± 1.2‰ and for 5 wild animals is 4.3 ± 0.5‰ (p = 0.002). The mean collagen δ13C value for domesticated animals is −20.6 ± 1.1‰ and for wild animals is −22.0 ± 0.5‰ (p = 0.004). The mean carbonate δ13C value for domesticated animals is −13.14 ± 1.3‰ and for wild animals is −14.14 ± 0.9‰ (p = 0.034). The “canopy effect” and anthropogenic effects that alter stable isotope ratios of plants (manuring, swidden agriculture and ploughing) are discussed in relation to these differences. Fish are isotopically variable, which suggests broad-spectrum fishing strategies and/or trade, and increases our awareness of the difficulties in interpreting human paleodiet when freshwater fish were on the menu.  相似文献   

7.
During the early Cold War, no part of the Arctic was as important to the United States’ strategic interests as Greenland: situated on the shortest straight-line route between the industrial centers of the two superpowers, Greenland was integral to North American continental security. The US desire to control Greenland, however, was complicated by the island’s isolated geography, harsh climate and barren landscape. Between 1948 and 1966, US forces in Greenland were entrenched in the ‘other cold war’: the struggle with the ice sheet environment which threatened to impede American capabilities in the region. This paper explores the ‘other cold war’ through two case studies: US scientific efforts to understand and cope with polar whiteouts and the plastic deformation of ice. These case studies illuminate a struggle between two philosophical approaches to nature: a brash, aggressive approach which aimed to conquer the Greenland environment, and a more nuanced approach which aimed to collaborate with that environment. I show that the second approach won out as Greenland’s exceptional geography and environment forced the US military to reassess its relationship with nature: rather than striving for control over the island space, US military personnel ultimately chose strategic cooperation with that space.  相似文献   

8.
The doctoral dissertation is a key component of postgraduate education that plays an important role for knowledge production and hence the development of a discipline. Swedish human geography currently lacks an overview of dissertations. This article fills this knowledge gap by reporting findings from a unique database covering all doctoral dissertations between 1884 and 2015. The paper focuses on the demographics of the authors (age, gender), the format of the dissertation and explores productivity variations for authors of compilation dissertations. The findings show a notable increase in the number of doctoral dissertations since the late 1960s but a decreasing share of doctoral dissertations in the social sciences since the 1970s. In terms of demographics, we show that while the age of the authors remains relatively stable, the gender-balance has improved considerably. In terms of format, the monograph has rapidly given way to compilation dissertations, which now account for half the number of dissertations. More than 70% of all dissertations are now published in English. Statistical results suggest that the likelihood of completing a compilation dissertation is greater if the doctoral candidate is young and if attending Umeå University. But individual author productivity for compilation dissertations is mainly influenced by unobservables.  相似文献   

9.
This paper examines the changing social, legal, spatial and emotional understandings of the companion animal–human relationship in Britain during the late twentieth and early twenty-first century, based upon in-depth interviews with pet owners and professionals involved in the pet industry. This period has seen rapid change in attitudes and practices towards companion animals, bringing benefits for both animal health and welfare, but also increasing social, emotional and financial expectations. Animals have become increasingly integrated into the human home and family, whilst simultaneously subject to increasing control of their behaviour and movements in public space. Such changes have brought a culture of ‘responsible’ pet ownership in which both animals and humans are subject to constant surveillance of their own and others pet-keeping practices. Such expectations are constantly changing and contested, with notions of human identity and status increasingly defined through human–animal relationships. These processes are ongoing and new forms of responsibility are continually evolving, providing new means for caretakers to express their love and care for their animal companions.  相似文献   

10.
This is the second in a series of Viewpoints about a symposium on the intersections and antagonisms between various forms of feminism and the politics of childhood. This article traces the various ways in which time and temporality were mobilised in symposium papers and discussions and considers the implications for efforts to conceptualise woman–child relations. In conclusion, the potentials and risks of focusing on temporality when theorising relations between those positioned as women and those positioned as children are considered.  相似文献   

11.
12.
13.
14.
15.
This article brings to light Lord Mountbatten's continuing links with India after 1948 - a neglected aspect of his life and career. It probes his involvement and influence in Indian affairs through his personal relationships and professional experience. In doing so, it presents Mountbatten as the personification of the change in Indo-British ties from those of empire to dominion and beyond. On the three key issues of Hyderabad, arms sales, and Kashmir, this article evaluates his role as a ‘friend of India’ in the West as well as a conduit for the British government(s) of the day to reach out to Nehru. Considering the scope and limits of ‘influence of friendship, it shows that Mountbatten remained characteristically involved in India after his departure and this was appreciated by both Nehru and his British counterparts. Mountbatten epitomised the old ties, which continued to bind India to Britain, after the empire and through the Commonwealth. His views were offered and sought; how much they influenced remains a matter of emphasis, but that he was involved cannot be denied. The weakening of Mountbatten's involvement and influence after Jawaharlal Nehru's death in 1964 represented the wider, generational weakening of Indo-British association.  相似文献   

16.
To robbers and thieves money is more tempting than other commodities. There was more money in Europe in 1100 than in 900. So we should expect, other things being equal, an increase in robbery in these two centuries. This expectation is confirmed by a survey of recorded cases; and it finds further corroboration in the fortunes of hagiographical motifs relating to thieves.  相似文献   

17.
To robbers and thieves money is more tempting than other commodities. There was more money in Europe in 1100 than in 900. So we should expect, other things being equal, an increase in robbery in these two centuries. This expectation is confirmed by a survey of recorded cases; and it finds further corroboration in the fortunes of hagiographical motifs relating to thieves.  相似文献   

18.
19.
20.
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