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排序方式: 共有163条查询结果,搜索用时 15 毫秒
91.
João Pedro dos Santos Laranjeira Helena Cruz Ana Paula Ferreira Pinto Carlos Pina dos Santos Joana Filipa Pereira 《International Journal of Architectural Heritage》2015,9(7):866-882
Fire safety is an important issue of building safety, especially when the building’s fire load contents enhance the risks of fire deflagration. When existing timber structures are involved, the most usual way to improve its reaction to fire is to treat wood with fire retardants. This study focuses on the surface protection of existing timber roof structures against fire, through the use of fire retardant (FR) treatments applied on site. An experimental investigation was carried out to study the effect of FR treatments on timber reaction to fire, with a special emphasis on timber members with biological deterioration and previously treated with preservative products. The behaviour and effectiveness of intumescent and non-intumescent treatments was also investigated. The study showed that the application of FR treatments improved the reaction to fire of timber, even in the presence of previous preservative treatments. However, the choice of the specific FR treatment should take into account the substrate conditions. In addition, test results suggest that protection systems involving multi layers (intumescent and non-intumescent) with different functioning modes each are likely to have a good global performance on the protection of timber elements against fire. 相似文献
92.
This article studies gender education gaps among indigenous and non‐indigenous groups in Bolivia. Using the National Census of Population and Housing 2012 and an estimation method analogous to difference‐in‐differences, the study finds that the intersection of gender and indigenous identity confers cumulative disadvantage for indigenous women in literacy, years of schooling and primary and secondary school completion. While gender education gaps have become narrower across generations, there remain significant differences within indigenous groups. The Aymara have the largest gender gap in all outcomes, despite having high overall attainment rates and mostly residing in urban centres with greater physical access to schools. The Quechua have relatively smaller gender gaps, but these are accompanied by lower attainment levels. The article discusses the possible sources of these differentials and highlights the importance of taking gender dynamics within each indigenous group into greater consideration. 相似文献
93.
João Pacheco de Oliveira 《Revue de synthèse / Centre international de synthèse》2000,121(3-4):411-436
Is it possible for an anthropologist to decide whether an individual or a collectivity can or cannot be characterized as « indigenous », and then proceed to establish the limits of the territory which should be assigned (or recognized) by the state? Does his role as a scientist furnish him with the conceptual and methodological instruments necessary for such a task? In epistemological and ethical terms, is this something which he should endeavour to do? The purpose of this paper is to discuss how these questions are being put to Brazilian anthropologists since the 1980s. Torn between an « indianist » and an « indigenist » discourse, between romanticism and political mediation, the anthropologist must define an appropriate posture for dealing with policy-making; one which will simultaneously safeguard the scientific quality of his work while addressing the specific demands of each situation. 相似文献
94.
Aqui Loureno Marques!! 《Journal of Historical Geography》2000,26(4):605
The Portuguese empire in Africa was one of the last to collapse amidst the waves of decolonization that swept the continent in the 1950s and 1960s. The astonishing endurance of Portuguese colonialisms until the mid-1970s can be viewed partly in relation to the communication technologies that underscored the Lusophone imperial presence in Africa in important cultural and political ways. This paper explores the historical geography of radio-broadcasting in colonial Mozambique and examines the importance of colonial anthropological knowledges in the formation of radio programming. Colonial broadcasters represented their work as «radio-colonization» and frequently stressed the links between their activities and the development of imperial and colonial modernity. From the very beginning of radio-broadcasting in Mozambique, broadcasters sought to harmonize their contribution to colonial culture and society with the objectives of the colonial state, and broadcasting became central to the capitalist development of the colony. In the dying days of Portuguese colonialism broadcasters belatedly began to attempt to assimilate non-white subjects into the perceived order of colonial modernization. Radio programming was differentiated in important ways according to ethnicity and gender and this paper seeks to discuss some of the complex relationships between colonial subjectivities and the search for the colonial modernization of Mozambique. 相似文献
95.
Carmen Bentué-Martínez Marcos Rodrigues José María Llorente González Antonio Sebastián Ariño Marcos Zuil Martínez María Zúñiga-Antón 《Geographical analysis》2024,56(2):265-283
The World Health Organization endorses the study of diseases from the perspective of the Determinants of Health (DH), that is, the circumstances in which people are born and raised, the environment in which they grow up and age and their lifestyle. The aim of this study is to analyze the spatial behavior of the prevalence of asthma in Aragon, a Mediterranean region in Spain, under the DH approach. The methodological process entailed building a spatial database collating asthma prevalence as dependent variable, and lifestyle, socioeconomic, and climate indicators as explanatory factors, and then evaluating the spatial variability of the relationships by combining the Principal Component Analysis (PCA), Multiscale Geographically Weighted Regression (MGWR) models and cartographic design techniques. MGWR evidenced spatially varying relationships operating at different scales. Lifestyles seem closely tied to the prevalence of asthma in most of the study area while urban functionality and local climate patterns seem to boost prevalence rates in some specific enclaves. Consequently, the social and environmental conditions that characterize the study area translate into several DH scenarios modulating the spatial distribution of asthma. This differential DH behavior detected by local regression models is relevant to guiding and refining public health decision-making. 相似文献
96.
William E. Banks Joo Zilho Francesco d'Errico Masa Kageyama Adriana Sima Annamaria Ronchitelli 《Journal of archaeological science》2009,36(12):2853-2867
We apply Eco-Cultural Niche Modeling (ECNM), using the Genetic Algorithm for Rule-Set Prediction, to reconstruct the ecological niches exploited by Middle Solutrean and Upper Solutrean populations during the latter stages of Heinrich Event 2 and the early part of the Last Glacial Maximum, respectively. We focus on the Upper Solutrean technocomplex and its regionally distinct styles of hunting weaponry to investigate whether regional cultural variability reflects a link between material culture and ecology. Our analytical approach uses archaeological and geographic data in conjunction with high-resolution paleoclimatic simulations and vegetation reconstructions for the two climatic phases in question. Our results indicate that cultural choices behind the production of specific projectile point types have at some level an ecological basis and are linked to particular environments. We also find that the identified pattern of Upper Solutrean territoriality has an ecological foundation, but that its stylistic expression in the variation of diagnostic armature types is likely a byproduct of cultural drift. We argue that ECNM is an effective means with which to evaluate the paleoecological pertinence of archaeologically defined artifact types and to identify the ecological and cultural mechanisms underlying material culture variability. 相似文献
97.
In a world in growing turbulence, complexity and uncertainty, where crisis is becoming the norm rather than the exception, resilience is increasingly seen as a critical feature that reflects the capacity of a system to absorb disturbance and reorganize without collapsing. Resilient systems are more adaptable to change, are more able to learn and are less vulnerable to disturbance and external shocks (e.g. natural phenomena, economic crises or political shifts). The resilience theories are re-emerging as a field of research and practice with application to socio-ecological systems, fostering new insights in the discussions about sustainable development. The main purpose of this paper is to explore resilience as a concept and as a framework for promoting more sustainable trajectories, highlighting its potentialities and advantages for policy and planning processes. SPARK, or the strategic planning approach for resilience keeping is introduced in the paper as a new sustainability framework, following key underlying concepts and seven key principles that capture the essence of resilience theories. The paper advances a methodological concept proposal for resilience assessment and planning that aims to contribute to linking theory and practice, performing knowledge brokerage and enhancing policy learning. 相似文献
98.
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100.
Susana Salvaterra Trovão Sónia Cristina Caetano Ramalho Maria Inês Pereira Torcato David 《Gender, place and culture : a journal of feminist geography》2015,22(3):325-343
In addition to being the object of policy and legal initiatives, families of migrant origin have become a focus of debate concerning differences and its limits. Migrants themselves, however, are also reflecting on how to manage family relationships in a changing world in which migration is mostly transnational. This article aims to discuss the influence of religious participation on the reconfiguration of processes of family dynamics promoted by three groups of migrant women who, while settled in Lisbon, maintain transnational ties with their countries of origin and with various diasporic spaces. Guiding research questions are: to what extent does religious participation provide migrant women with connections, networks and other intangible resources? How are these resources mobilised as ‘bonding' and ‘bridging' social capitals? Can such capitals become a conduit for the redefinition of family relations and female self-narratives? Comparative analysis confirms that the three groups discussed not only mobilise religious belonging and ties to generate resources, but also convert these connections into social (and other forms of) capital, thus triggering desired changes that affect the lives of their children and families in both the short and long term. While migration does not alter long-standing patterns provided by their own respective sociocultural frames of belonging, our findings reveal that the three groups of interlocutors use religious participation to explore tactics, social capitals and mobility spaces and, further, to negotiate, without subverting, specific family inequality dynamics. 相似文献