首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   56篇
  免费   2篇
  2022年   1篇
  2020年   1篇
  2019年   2篇
  2018年   2篇
  2017年   1篇
  2016年   2篇
  2015年   1篇
  2014年   4篇
  2013年   22篇
  2012年   1篇
  2011年   2篇
  2010年   3篇
  2008年   2篇
  2007年   1篇
  2006年   2篇
  2005年   1篇
  2001年   1篇
  2000年   2篇
  1998年   1篇
  1994年   1篇
  1992年   1篇
  1987年   1篇
  1980年   2篇
  1976年   1篇
排序方式: 共有58条查询结果,搜索用时 15 毫秒
1.
2.
There has been a recent increase in the body of knowledge related to children and disasters. These studies converge into three main fields of research: the impact of disasters on children and their psychological recovery, the integration of disaster risk reduction (DRR) into the education sectors and children’s participation in DRR. This article provides a literature review of the two latter fields of research where the focus is on reducing disaster losses and building resilience prior to a disaster. Overall, 48 studies are critically reviewed and compared in relation to the strengths and weaknesses of their aims, methods, locations of research, impact, and outcomes. The review identified a number of differences between the two fields and significant opportunities for linking the two approaches, sharing lessons and knowledge. Based on the review, recommendations for further research are outlined.  相似文献   
3.
The arts can be a powerful tool for emancipation, community building and political expression. This article makes the argument that artistic and cultural expression should be viewed by politicians and policy makers as an effective form of political engagement and an important feedback loop for understanding the political dissatisfaction of the electorate. It draws on one particular historical example, the Négritude movement, to highlight the value and strength of cultural movements in responding to questions of politics and to draw out lessons for current policy makers in recognising the value of culture in effecting political change. Against a contemporary political and scholarly narrative of disaffected citizenship, this article demonstrates that a lack of trust in a political model does not necessarily demonstrate a disinterested citizenry; rather it can suggest a citizenry who have found new and innovative ways to engage. The Négritude movement provides one such historical example.  相似文献   
4.
This article explores the consequences of a massacre of civilians in Asaba, a town on the west bank of the river Niger, during the early stages of the Nigerian civil war. While ethnically Igbo, Asaba was not part of the Igbo-dominated Biafra, remaining part of the ethnically diverse midwest region. In the international memory of the war, the midwest action, which claimed several thousand lives, has been eclipsed by the catastrophic events east of the Niger, after the federal blockade of Biafra. This article sheds new light on the human cost of the war on civilian populations outside Biafra. Drawing on interviews with survivors and their descendants, we describe the killings, pillaging and rapes that followed the arrival of the federal troops, and trace the long-term impact and memory of the physical and human devastation in Asaba on family structure, gender roles, educational opportunities and social structure. We show how the official suppression of the massacres, coupled with Biafran awareness of the events, contributed to the subsequent course of the war, and we suggest that this suppression has left a legacy that perpetuates resentment and has kept ethnic tensions alive to this day.  相似文献   
5.
Behavioral ecology is the study of adaptive behavior in relation to social and environmental circumstances. Analysts working from this perspective hold that the reproductive strategies and decision-making capacities of all living organisms—including humans—are shaped by natural selection. Archaeologists have been using this proposition in the study of past human behavior for more than 30 years. Significant insights on variation in prehistoric human subsistence, life history, social organization, and their respective fossil and archaeological consequences have been among the more important results.  相似文献   
6.
7.
8.
9.
Accreting skeletal tissues found in bone, teeth, otoliths and molluscan shell act as sensitive recorders of local environmental and climatic conditions. Owing to their robust nature, ubiquity and abundance in the archaeological record as well as the potential for high-resolution data acquisition, the accreting skeletal tissues of archaeological molluscs are increasingly employed as palaeoenvironmental proxies. Researchers have chiefly utilised such proxies to extend instrumental records of environmental conditions through palaeoenvironmental reconstruction and explore the impact of environmental and climatic change on human populations. However, the use of environmental proxies from the archaeological record can be hampered by a number of methodological challenges including inadequate sampling strategies, appropriate calibration, the use of inappropriate proxies and the broad extrapolation of localised results. This paper reviews the use of molluscan shell from archaeological contexts as palaeoenvironmental proxies. We focus on the application of sclerochronology—a suite of high-resolution physical and geochemical data recovery methods widely used in conjunction with molluscan shell. This paper presents an overview of the potential of these techniques in approaching more nuanced understandings of human-environment interactions and how they can be more successfully incorporated into archaeological research.  相似文献   
10.
The Krafla geothermal system is located in Iceland's northeastern neovolcanic zone, within the Krafla central volcanic complex. Geothermal fluids are superheated steam closest to the magma heat source, two‐phase at higher depths, and sub‐boiling at the shallowest depths. Hydrogen isotope ratios of geothermal fluids range from ?87‰, equivalent to local meteoric water, to ?94‰. These fluids are enriched in 18O relative to the global meteoric line by +0.5–3.2‰. Calculated vapor fractions of the fluids are 0.0–0.5 wt% (~0–16% by volume) in the northwestern portion of the geothermal system and increase towards the southeast, up to 5.4 wt% (~57% by volume). Hydrothermal epidote sampled from 900 to 2500 m depth has δD values from ?127 to ?108‰, and δ18O from ?13.0 to ?9.6‰. Fluids in equilibrium with epidote have isotope compositions similar to those calculated for the vapor phase of two‐phase aquifer fluids. We interpret the large range in δDEPIDOTE and δ18OEPIDOTE across the system and within individual wells (up to 7‰ and 3.3‰, respectively) to result from variable mixing of shallow sub‐boiling groundwater with condensates of vapor rising from a deeper two‐phase reservoir. The data suggest that meteoric waters derived from a single source in the northwest are separated into the shallow sub‐boiling reservoir, and deeper two‐phase reservoir. Interaction between these reservoirs occurs by channelized vertical flow of vapor along fractures, and input of magmatic volatiles further alters fluid chemistry in some wells. Isotopic compositions of hydrothermal epidote reflect local equilibrium with fluids formed by mixtures of shallow water, deep vapor condensates, and magmatic volatiles, whose ionic strength is subsequently derived from dissolution of basalt host rock. This study illustrates the benefits of combining phase segregation effects in two‐phase systems during analysis of wellhead fluid data with stable isotope values of hydrous alteration minerals when evaluating the complex hydrogeology of volcano‐hosted geothermal systems.  相似文献   
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