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71.
Domestication is an ongoing co-evolutionary process rather than an event or invention. Recent zooarchaeological and animal
genetics research has prompted a thorough revision of our perspectives on the history of domestic animals in Africa. Genetic
analyses of domestic animal species have revealed that domestic donkeys are descended from African ancestors, opened a debate
over the contribution of indigenous aurochs to African domestic cattle, revealed an earlier and possibly exogenous origin
of the domestic cat, and reframed our vision of African dogs. Genetic diversity studies and mapping of unique traits in African
cattle, sheep, goats, pigs and chickens indicate adaptations to regional environmental challenges and suggest hitherto unknown
and complex patterns of interactions both among Africans and with Southwest Asia and other Asian regions on the Indian Ocean.
This article argues against the static perspective on domestication as invention and for viewing it as a dynamic, locally
based and continuing process. 相似文献
72.
DO FLOODS HAVE PERMANENT EFFECTS? EVIDENCE FROM THE NETHERLANDS 总被引:1,自引:0,他引:1
Trond G. Husby Henri L.F. de Groot Marjan W. Hofkes Martijn I. Dröes 《Journal of regional science》2014,54(3):355-377
This study investigates the short‐ and long‐run impact on population dynamics of the major flood in the Netherlands in 1953. A dynamic difference‐in‐differences analysis reveals that the flood had an immediate negative impact on population growth, but limited long‐term effects. In contrast, the resulting flood protection program (Deltaworks), had a persisting positive effect on population growth. As a result, there has been an increase in population in flood‐prone areas. Our results suggest a moral hazard effect of flood mitigation leading to more people locating in flood‐prone areas, increasing potential disaster costs. 相似文献
73.
Thomas B. Fischer Olivier Sykes Thomas Gore Naja Marot Mojca Golobič Paulo Pinho 《European Planning Studies》2015,23(3):433-451
European Union directives, along with their transposing arrangements in EU member states, can have unanticipated and sometimes undesirable impacts on certain regions and places. These include impacts on the use of space (e.g. new infrastructure or sprawl), governance, and on wider social, economic or environmental dimensions. Although ex-ante assessment of the potential impacts of EU initiatives has been carried out since 2002 through the European Commission's Impact Assessment procedure and also through national equivalents in some member states, important impacts are still overlooked, frequently because of their territorially heterogeneous nature within and between EU member states. This paper presents the results of the ESPON EATIA research project, in which a new territorial impact assessment methodology was developed for national and regional administrations in EU member states in order to inform their national positions during the negotiation of European draft directives and potentially other policy proposals. 相似文献
74.
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76.
Gerrit Olivier 《International affairs》2003,79(4):815-828
Foreign relations are the main preoccupation of South African president, Thabo Mbeki. His role perception is dominated by a mission to improve the plight of Africa, and second to that, to act as the Third World's überdiplomat . Under his administration, South Africa's foreign policy has become almost an adjunct of his more holistic diplomatic pursuits. The New Partnership for Africa's Development (NEPAD) is the magnum opus of Mbeki's foreign policy, and the success or failure of this grand design for an African renaissance will determine his legacy and make or break his leadership in South Africa and in the rest of Africa. The success of his NEPAD diplomacy is a daunting task, requiring the support of his African peers, his South African constituency, and the leadership of the developed nations of the world. Dealing with these diverse elements, Mbeki's policy-making oscillates between realism and idealism, and between ideology and interests, giving the impression of a style of a prudent bureaucrat rather than that of a single-minded reformer. In the end, his diplomacy seems to founder because it fails to satisfy the contradictory demands of any of these three constituencies. However, even if NEPAD should fail as a project, its role could be that of a harbinger of a new political and economic era in Africa and the movement away from post-colonial orthodoxy. 相似文献
77.
Abstract. This paper estimates the effects of knowledge spillovers on patent growth rates across 335 European regions over the 1989–1999 period. We propose a dynamic model based on an innovation production function. A Bayesian approach is used to take into account area‐specific innovation and spatial spillovers. The estimation of the model proceeds via Markov Chain Monte Carlo simulation. The results show significant positive and negative spatial effects on innovative activity. The model allows for a rich spatial specification, which we illustrate by incorporating transport proximity measured by transportation time between regions to augment the typical spatial proximity measure of connectivity between regions. Doing this produces more pronounced spatial spillovers that exhibit a more polarized spatial pattern than a model relying on spatial proximity alone. 相似文献
78.
Olivier Keller 《Revue de synthèse / Centre international de synthèse》1998,119(4):545-573
The study of the mathematics of prehistory cannot be founded on bare archeological data alone; it may be useful to set the archeological documents in context, with the help of comparative ethnography, according to which our own contemporaray or near-contemporary primitive societies can help us understand our prehistoric ancestors. Although once used spontaneously by several historians of mathematics, this approach has been rejected on principle by the recent school of ethnomathematicians. This paper sets out to show, by means of a certain number of examples, that the method can nonetheless yield rewards: on the one hand because it demolishes the fantastic theories so fondly constructed by certain mathematicians, and on the other because it opens up a vast field of research which has so far been vitually unexplored. 相似文献
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Nireka Weeratunge Olivier Joffre Sonali Senaratna Sellamuttu Bounthanom Bouahom Anousith Keophoxay 《Gender, place and culture : a journal of feminist geography》2016,23(11):1599-1614
Hydropower development with concomitant changes in water and land regimes often results in livelihood transformation of affected people, entailing changes in intra-household decision-making upon which livelihood strategies are based. Economic factors underlying gender dimensions of household decision-making have been studied rigorously since the 1970s. However, empirical data on gender and decision-making within households, needed for evidence-based action, remain scarce. This is more so in hydropower contexts. This article explores gender and livelihood-related decision-making within rural households in the context of hydropower development in Lao PDR. Based on a social well-being conceptual approach with data from a household survey and qualitative interviews, it focuses on household decisions in an ethnic minority resettlement site soon after displacement, from an interpretive perspective. The article, first, aims to assess the extent to which household decision-making is gendered and secondly, to understand the complex reasoning behind household decisions, especially the relevance of material, relational, and subjective factors. It argues that while most household decisions are ostensibly considered as ‘joint’ in the study site, the nuanced nature of gendered values, norms, practices, relations, attitudes, and feelings underlying these decisions are important to assessing why households might or might not adopt livelihood interventions proposed by hydropower developers. 相似文献