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   108篇
  免费   10篇
  2023年   3篇
  2021年   3篇
  2020年   2篇
  2019年   8篇
  2018年   3篇
  2017年   8篇
  2016年   8篇
  2015年   2篇
  2014年   5篇
  2013年   16篇
  2012年   3篇
  2011年   6篇
  2010年   7篇
  2009年   6篇
  2008年   5篇
  2007年   5篇
  2006年   3篇
  2005年   2篇
  2004年   1篇
  2003年   3篇
  2002年   1篇
  2001年   1篇
  1999年   1篇
  1997年   1篇
  1996年   2篇
  1995年   3篇
  1994年   3篇
  1993年   3篇
  1992年   1篇
  1990年   1篇
  1988年   1篇
  1986年   1篇
排序方式: 共有118条查询结果,搜索用时 15 毫秒
1.
Qatar, a small Gulf Arab nation with a de facto absolute monarchy, held its first general elections ever for 30 Shura Council seats on October 2, 2021. This marked the first time in Qatar's history that citizens played a more direct role in government, moving beyond symbolic elections. This study aimed to examine the factors likely to have influenced voters' selection of candidates, the key issues that are significant to Qatari citizens, and the possible characteristics of candidates that are deemed essential. While informal conversations are the main method of data collection for this study, social identity theory, specifically group-based models, was used to understand the influences that shape Qatari voters' choices of candidates. Findings indicate that tribe-related and family-connected attributes constitute important influences on voters' choice decisions. Moreover, voters were concerned about candidates' characteristics and the issues and policies candidates deemed important. Discussion and recommendations are provided.  相似文献   
2.
In the aftermath of several decades of neoliberalism in Eastern Europe, the social fabric of post-socialist societies is frayed. In this context, nationalist cultural policies and everyday displays of national belonging have emerged as key instruments of social solidarity. There has recently been a drive of state initiatives in Latvia in the field of cultural policy aimed at strengthening national identity. In this paper, we focus our attention on one particular cultural policy initiative, Latvian Films for Latvian Centenary. Drawing on qualitative interviews with 16 film directors who participated in the Centenary film programme, the paper explores how artists and cultural operators involved in this programme are mobilised as national(ist) subjects and how they see their work within such a framework. We argue that nationalist cultural policy can be successfully implemented because the artists, themselves formed as responsible political and moral subjects in the tradition of Latvian cultural nationalism, share a regard for culture and the arts as a resource for sustaining the political statehood and the national community. However, the artists also recognise the limitations of their work as a source of social cohesion and solidarity in a society that is ethnically divided.  相似文献   
3.
4.
This quantitative analysis examines evidence for the impacts of mothers’ death on the schooling of their left-behind children (ages 6–17 years) in the Matlab Health and Demographic Surveillance System (HDSS) area of the International Centre for Diarrhoeal Disease Research, Bangladesh. The analysis compared the completed levels of primary and junior secondary schooling in 2005 (respectively Class 1 among ages 6–17, Class 5 among ages 12–17 and Class 7 among ages 15–17) of children whose mothers had died during 1982–2005 (from maternal and/or nonmaternal causes, and any cause) with the completed schooling of children of surviving mothers in 2005. The results, after controlling for selected socioeconomic variables, indicate that children whose mothers had died had lower completion of schooling levels, and that those children from poorer households fared worst.  相似文献   
5.
The Rabat-Témara region of the Moroccan Atlantic coast reveals a succession of Quaternary palaeobeaches. This coastal area is dotted with numerous prehistoric caves. The study of the Upper Pleistocene coastal landscape associated with these caves is of paramount importance in the knowledge of human population subsistence. During the Upper Pleistocene, the ocean level changes drastically influenced the coastal geomorphology as well as the fauna assemblages. The chrono-lithostratographical analysis of the coastal sedimentary formations allows the distinction of three sequences rich in marine fauna. These sequences date from MIS 11 to MIS 5. The identification of malacofauna species from these deposits revealed 39 species, along with Bryozoans, Crustaceans, and Echinoids. These assemblages show a constant fauna cortege highlighted by the dominance of the amphi-Atlantic species Stramonita haemastoma. This species shows an increase in the number of specimens in the uppermost part of marine deposits, probably in relation with a climate warming in the MIS 5. This fauna of both intertidal rocky substrates and sandy substratum indicates environmental conditions close to the present-day Rabat-Témara coastline. As in other coastal locations of Africa from MIS 5, the Middle Stone Age Homo sapiens population benefitted from a littoral environment rich in coastal resources. Comparison between thanatocenoses and archaeological records allows us to identify both species available for Middle Stone Age population and those preferred for human use.  相似文献   
6.
Five Iron Age ceramic lamps from a tomb at the site of Sahab in the south‐eastern part of central Jordan were analysed using gas chromatography – mass spectrometry (GC–MS). The results of this study provide data on the type of fuel used in three of these lamps. The study proposes that animal fat, possibly of ruminant origin, was used in three Early Iron Age II lamps. The material used in the other two Iron Age I lamps could not be determined due to the absence of diagnostic biomarkers. The data obtained from the lamps can be put in conjunction with the archaeological evidence on the availability of domestic animals and, most probably, use of their products at the site of Sahab during the Iron Age.  相似文献   
7.
The paper discusses the potential of a collaborative scheme for the development of a protocol for recording and managing the cultural heritage in Libya. The critical political situation in the country urges the development of cultural heritage management policies in order to protect it more thoroughly and consistently. Moving on from the numerous international initiatives and projects dealing with a mostly “remote” approach to the issue, the project here presented to engages with staff members of the Department of Antiquities (DoA) in the development of a joint strategy for the application of remote sensing and geographical information systems (GIS) to the preservation and monitoring of Libyan cultural heritage. A series of training courses resulted in an initial development of new ways of recording and analysing field data for a better awareness of the full range of threats that the archaeology of the country is subject to. Focussing on the case of the Jebel Nafusa, the training involved the assessment of site visibility on satellite imagery, the analysis of high-resolution satellite datasets for archaeological mapping, the creation of a GIS spatial database of field data, and the mapping of risks and threats to archaeology from remote sensing data. This led to the creation of of a risk map showing the areas that are affected by a number of threats, thus giving the DoA a tool to prioritise future fieldwork to keep the assessment of site damage up to date. Only a collaborative approach can lead to a sustainable strategy for the protection of the invaluable cultural heritage of Libya.  相似文献   
8.
Predrill overpressure prediction is important for well planning and migration modeling for prospect evaluation. The Eaton (Journal of Petroleum Technology, 24 , 1972, 929) and Bowers (SPE Drilling & Completion, 10 , 1995, 89) methods are used worldwide for postdrill overpressure prediction using sonic log and predrill overpressure prediction using seismic interval velocity. In this research, these two methods were used for overpressure prediction using 3D anisotropic prestack depth‐migrated seismic interval velocity in a field of the Malay Basin. In the shallow overpressured zone, where the mechanism of overpressure is undercompaction, the onset of overpressure was predicted reasonably well using the Eaton and Bowers methods with their standard parameters (i.e., Eaton exponent 3 and Bowers loading curve) for seismic velocity. However, in the deep overpressured zone, where fluid expansion is the cause of overpressure generation, these methods underpredicted the high overpressure. In the deep overpressured zone, the overpressures were better predicted by applying a correction to the Eaton method. On the other hand, the Bowers unloading parameters for the fluid expansion mechanisms did not show any significant effect on overpressure prediction. Hence, in the study area, the Bowers method is not effective for 3D overpressure prediction using seismic velocity, whereas the Eaton method is more robust and can be used for 3D overpressure prediction from seismic velocity.  相似文献   
9.
Osteoporosis is a condition of reduced total bone mass per unit volume for the normal ratio of bone mineral to bone matrix. The present work deals with the investigation and evaluation of osteoporosis in ancient Egyptians of two social classes from the Old Kingdom in Giza. The aims of this study are to provide information about the lifestyle and health status of ancient Egyptians, and to detect the causes of osteoporosis. The material consisted of 74 skeletons (43 males and 31 females) from two different social classes (high officials and workers). Skeletons were excavated from the Giza Necropolis and belonged to the Old Kingdom (2687–2191 BC). Dual energy X‐ray absorptiometry (DEXA) was used to measure bone mineral density (BMD) at different skeletal sites (radius, fourth lumbar vertebra and head of femur). Moreover, scanning electron microscopy (SEM) was used to show the microarchitectural structure of the bone. Results showed a significant decrease of BMD values in old age groups compared with younger ones in both sexes. In addition, SEM of trabecular bone in osteoporotic cases demonstrated that the horizontal trabeculae were more affected than the vertical trabeculae. Comparison between high officials and workers revealed that osteoporosis was more frequent in male workers than in male high officials, and in female high officials than in female workers. An elevated prevalence of osteoporosis among male workers may be related to the effects of nutritional stress and excessive workload, while a sedentary lifestyle may have played a role in the occurrence of osteoporosis among female high officials. Moreover, osteoporosis occurs earlier and more frequently in females than males, which may be related to the hormonal changes that accompany the menopause in females. This study emphasises the importance of gender and lifestyle factors in influencing the severity of osteoporosis. Age‐related bone loss at most skeletal sites is noted in both sexes of ancient Egyptians. Copyright © 2008 John Wiley & Sons, Ltd.  相似文献   
10.
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