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Traffic volume and highway permeability for a mammalian community in the Canadian Rocky Mountains 总被引:3,自引:0,他引:3
We examined whether highway traffic volume changed the rates of movement (habitat permeability) for ten mammalian species in the central Canadian Rocky Mountains. Winter track count data were collected on four highways of varying traffic volume: the Trans-Canada Highway (TCH) (14,000 annual average daily traffic [AADT]) and 1A Highway (3,000 AADT) in Banff National Park and the Highway 40 (5,000 AADT) and Smith Dorrien Trail in Kananaskis Country (2,000 AADT). Permeability represented the ratio of road crossing tracks/km to tracks/km on transects adjacent to roads. We compared permeability at the community level and for carnivore and ungulate guilds, using a Kruskal–Wallis H -test. Traffic volume significantly reduced habitat permeability for the community ( P < 0.05). Pair-wise Kruskal–Wallis tests showed that habitat permeability was significantly reduced for carnivores at high traffic volume ( P = 0.008) and for ungulates at very high traffic volume ( P < 0.043). Cross-referencing with winter traffic counts, we found movement was impaired for carnivores when traffic ranged from 300 to 500 vehicles per day (VPD) and for ungulates between 500 and 5,000 VPD. Our results indicated that the TCH requires mitigation to restore habitat permeability for all species and yielded strong evidence that the Highway 40 is a priority for mitigation. 相似文献
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Johanna Waters 《The Canadian geographer》2003,47(3):219-234
This paper contributes to current theoretical debates surrounding concepts of transnationalism and citizenship through an in‐depth, qualitative analysis of 'astronaut families' and 'satellite kids' in Vancouver, Canada. Specifically, it asks whether the emergence of these ostensibly transnational households amongst Hong Kong and Taiwanese groups indicates a form of 'instrumental citizenship'( Ip, Inglis and Wu 1997 ). The circumstances surrounding these family arrangements indeed point to a strategic use of migration, wherein one or both adults planned prior to emigration that they would return, imminently, to the country of origin to work, optimising financial opportunities. The children would remain in Vancouver to obtain an education, during which time the family would be able to acquire Canadian citizenship. Such depictions of a strategising, 'hypermobile'( Skeldon 1995 ) Chinese cohort fail, however, to capture an important aspect of the transnational experience, wherein research participants clearly undergo settlement over time and, for want of a better term, a degree of acculturation. This paper suggests that the 'mobility' of the Chinese diaspora has been often over emphasised in recent accounts of contemporary migration patterns, too hastily rejecting outright traditional conceptions of immigrant settlement experience . 相似文献
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As a result of the incomplete English conquest, the relationship between the English in Ireland (the Anglo-Irish) and the native Irish is a major theme in the history of Ireland in the later middle ages. Since these connections were negotiated locally rather than centrally, each relationship is as individual as the Anglo-Irish lords and Irish leaders who negotiated them. This article explores the relationships between the Desmond Geraldines and two Irish dynasties which maintained semi-autonomous kingdoms to the north and southwest of the earldom of Desmond: the Uí Bhriain (O'Briens) and the Mic Charthaigh (Mac Carthys). The Desmond Geraldines developed relationships not just with the ruling lines but also with cadet branches of these dynasties. The connections which formed between the Desmond Geraldines and these Irish lineages demonstrate several of the key types of relationships which developed throughout Ireland as well as indicating the importance these associations played in both maintaining and disrupting the stability of the English lordship in Ireland. 相似文献
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This research compares two current methods for recording bony changes at muscle attachment sites, called entheseal changes (EC); the Mariotti method and the Coimbra method, to evaluate the concordance and comparability of results in a post‐medieval skeletal collection from Aalst, Belgium (n = 116). For both methods, the EC scores produce broadly similar patterns, are symmetrical and differ between age groups. Statistical differences between the upper and lower limb and the lower limb of males and females only occur in the Mariotti method. With careful consideration of the influence of different EC score ranges, the results from the two methods can generally be compared. 相似文献
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Dr. Rupert Gaderer 《Berichte zur Wissenschaftsgeschichte》2014,37(4):351-362
“[…︁] mein Recht muss mir werden!” Hermann Bahr’s Tragicomedy Der Querulant (1914). At the end of the eighteenth century, people who became notorious for their excessive engagement in legal proceedings started being labeled as “querulents” or “paranoid litigants”. The term “querulents” first appeared in the General Order of the Court for the Prussian States (Allgemeine Gerichtsordnung für die Preußischen Staaten) from July 6, 1793. From there on, the spectrum of juridical measures undertaken against the so-labeled litigators included classifying these persons as ineligible for legal action and psychiatric hospitalization. The paper discusses to what extent Hermann Bahr rearranges psychiatric and legal knowledge about this special type of the complainer in his tragicomedy Der Querulant, premiered in 1914. This concerns, first, the theatricality of the body and speech, secondly, the use of cultural techniques of writing and, thirdly, conflicting notions of justice. Therefore, the paper analyzes the aesthetic function of querulous behavior in the dramatic structure of the play from the point of view of both media theory and literary theory. 相似文献
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Johanna L Waters 《对极》2006,38(5):1046-1068
This paper explores the socio‐spatial implications of recent developments in the internationalisation of education, which includes the growth in numbers of foreign students and the establishment of offshore schools. It demonstrates the relationship between emergent geographies of international education in the “West” and social reproduction in both student “sending” and “receiving” societies. Drawing on fieldwork in Hong Kong and Canada, it argues that international education is transforming the spatial scales over which social reproduction is achieved: on the one hand, upper‐middle‐class populations in East Asia are able to secure their social status through the acquisition of a “Western education”, thereby creating new geographies of social exclusion within “student‐sending” societies. On the other hand, primary and secondary schools in Canada are able to harness the benefits of internationalisation in order to offset the negative effects of neoliberal educational reform, thereby facilitating local social reproduction. 相似文献