全文获取类型
收费全文 | 273篇 |
免费 | 16篇 |
出版年
2023年 | 4篇 |
2022年 | 1篇 |
2020年 | 3篇 |
2019年 | 8篇 |
2018年 | 13篇 |
2017年 | 14篇 |
2016年 | 12篇 |
2015年 | 11篇 |
2014年 | 7篇 |
2013年 | 71篇 |
2012年 | 16篇 |
2011年 | 12篇 |
2010年 | 6篇 |
2009年 | 11篇 |
2008年 | 10篇 |
2007年 | 7篇 |
2006年 | 5篇 |
2005年 | 2篇 |
2004年 | 1篇 |
2003年 | 2篇 |
2002年 | 6篇 |
2001年 | 3篇 |
2000年 | 9篇 |
1999年 | 4篇 |
1998年 | 1篇 |
1997年 | 2篇 |
1996年 | 3篇 |
1995年 | 3篇 |
1994年 | 3篇 |
1993年 | 1篇 |
1992年 | 2篇 |
1991年 | 3篇 |
1989年 | 3篇 |
1988年 | 3篇 |
1987年 | 3篇 |
1986年 | 2篇 |
1985年 | 1篇 |
1983年 | 2篇 |
1982年 | 1篇 |
1979年 | 4篇 |
1977年 | 1篇 |
1976年 | 2篇 |
1974年 | 3篇 |
1973年 | 2篇 |
1970年 | 1篇 |
1965年 | 1篇 |
1964年 | 1篇 |
1961年 | 1篇 |
1958年 | 2篇 |
排序方式: 共有289条查询结果,搜索用时 15 毫秒
11.
12.
Hans Bakker 《Indo-Iranian Journal》1982,24(2):103-126
13.
14.
Michael L. Brennan Frank Cantelas Kelley Elliott James P. Delgado Katherine L. C. Bell Dwight Coleman Allison Fundis Jack Irion Hans K. Van Tilburg Robert D. Ballard 《Journal of Maritime Archaeology》2018,13(2):97-121
Telepresence-enabled exploration of deep sea environments has developed over the past 30 years, providing access to archaeologists, scientists, and the general public to sites otherwise inaccessible due to depth. Pioneered through the inception of the JASON Project in the late 1980 s, telepresence missions have expanded to two dedicated ships of exploration, NOAA Ship Okeanos Explorer and exploration vessel Nautilus, and has been implemented on a series of opportunistic missions on other vessels. This paper chronicles the history of the use of telepresence for the exploration of shipwrecks in deep water as well as how this capability has allowed the public to engage with such missions. Broadening the scope of who can explore the deep sea, telepresence has also expanded what is observed and documented in the deep, which speaks to humanity’s use of the maritime world and an archaeology of discard through our material disposed of into the deep sea. 相似文献
15.
AbstractAcross most of Europe, the countryside seems to show a polarized development in which large districts are depopulating, while certain areas, mainly around big- and mid-sized cities, are increasing in population. The latter development is often described in concepts of “rural gentrification” and “rurbanization”, symbolizing a transformation of rural communities to communities with urban values and lifestyles. Most studies of the effects of these processes have focused on social and cultural consequences, as e.g. the displacements of lower-income households with higher-income residents and of rural culture and values with urban ones. This paper examines the phenomenon from another perspective, namely the effects of the “rurbanization” processes on countryside's labour markets and economic life. This paper aims at analysing the determinants of net migration to rural areas in general and to different types of regions, and the impacts of in-migration on rural labour markets, self-employment and other socio-economic conditions in Sweden for the period of 2003–2005. We find that net migration into rural areas increases with the size of adjacent local and regional centres, whereas net migration decreases with the average commuting distance of workers in the rural areas. When comparing in-migrants to rural areas with rural area stayers, our results indicate that the former has lower incomes, a lower employment ratio and a lower degree of entrepreneurial activities. These differences could—at least partly—be explained by the fact that rural area stayers were on average 6 years older than rural area in-migrants, i.e. the two groups were in different stages of their life cycles. 相似文献
16.
17.
Jan Stöckmann 《国际历史评论》2016,38(5):1055-1080
This paper examines the dynamics of internationalist and nationalist political thought in the formation of International Relations (IR) scholarship in Germany during the early twentieth century. It argues that while liberal internationalism played a significant role in shaping the discipline, IR scholars were often devout nationalists and worked for their government rather than for international peace. German institutions for the study of IR, like their Anglo-American counterparts, were founded in the aftermath of the First World War. Celebrated during the 1920s as ‘bulwarks of democracy’, they were nationalised by the Nazi government, lost their academic profile and since then have been largely forgotten. This paper explains the origins of IR research at the Institut für Auswärtige Politik, based in Hamburg and directed by Albrecht Mendelssohn Bartholdy, as well as at the Deutsche Hochschule für Politik, led by Ernst Jäckh in Berlin. Formally inaugurated in 1923 and 1920 respectively, both institutions drew on pre-war intellectual traditions as well as wartime networks. In light of recent re-appraisals of inter-war IR scholarship in other countries, the German case offers new and important insights into the complex intellectual traditions of what has traditionally been oversimplified as a first ‘great debate’ between ‘idealists’ and ‘realists’. 相似文献
18.
Nikolaos Zacharias Alexander Schwedt Jaume Buxeda i Garrigós Christodoulos T. Michael Hans Mommsen Vasilis Kilikoglou 《Journal of archaeological science》2007
In luminescence dating, the potassium concentration significantly contributes to the dose rate value in the age estimation. Within this study, fine-grain thermoluminescence dating has been applied on sherds of calcareous pottery of known age, excavated at a Roman site in Mallorca, Spain. For those of the samples that showed signs of severe potassium leaching, according to chemical and mineralogical examination, the thermoluminescence analysis provided overestimated dates. By using the known archaeological age of the samples, a corrected dose rate value can be estimated which provides the potassium concentration averaged for the burial period. Finally, a step-like model can then be used to estimate the fraction of the burial period after which most of the alteration effects took place. 相似文献
19.
20.