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   90篇
  免费   2篇
  92篇
  2019年   1篇
  2017年   1篇
  2015年   1篇
  2013年   5篇
  2012年   14篇
  2011年   7篇
  2010年   10篇
  2009年   4篇
  2008年   3篇
  2007年   4篇
  2006年   6篇
  2004年   1篇
  2003年   3篇
  2001年   1篇
  2000年   2篇
  1998年   3篇
  1997年   2篇
  1996年   2篇
  1995年   1篇
  1994年   4篇
  1993年   4篇
  1992年   1篇
  1991年   2篇
  1990年   2篇
  1989年   2篇
  1986年   1篇
  1984年   1篇
  1982年   2篇
  1979年   1篇
  1971年   1篇
排序方式: 共有92条查询结果,搜索用时 0 毫秒
51.
52.
This article takes the state of health in the world today as the starting point for a backward look at the trajectory that has led to our current position and speculation about prospects for improved global health in the future. Our model of social development and its dominant value system, which has promoted scientific progress but has also brought about great social, economic and health instability, is interrogated. This leads to questions such as what it means to be healthy and what the practice of medicine is about. Three potential scenarios for global health in the future are outlined. It is suggested that deep introspection about our current value system is required to achieve a paradigm shift that could reverse current trends and lead both to improvements in health globally and to less human insecurity. The authors conclude that while we have the material resources to achieve ambitious goals we may lack the moral and political will to do so. An expanded discourse on ethics and human rights—as well as on the limits of what is politically possible— may provide the impetus to drive change towards an improved global economic system and better health globally.  相似文献   
53.
Foreign direct investment (fdi) research on Canada has historically been centred on incoming rather than outgoing controlling capital. Yet the activities of Canada-based multinational enterprises (mne) have fostered an impressive outflow of direct investment abroad. To appreciate the importance of Canada's mne, one must understand the spatial and functional characteristics of Canadian parent companies and their foreign direct investments. To realize this goal, a sample of more than 17 000 examples of Canadian fdi (at various points in time) has been retrieved and analyzed. Spatially, the favourite target of Canadian outward fdi has been the United States and then the United Kingdom, but significant agglomerations of Canadian controlling capital can be found in many parts of the world (particularly in Western Europe, the Caribbean region, Australia, and Brazil, and in various Asian destinations). The locations of Canadian parent companies have been heavily biased toward the largest metropolitan cities. Additionally, multinational enterprises headquartered in Toronto and Montreal control (by far) the most foreign subsidiaries. In general, manufacturing, financial, and mining activities have constituted the most important endeavours of Canadian multinationals abroad. This pattern of functional emphasis, however, does vary with each specific location. Through a stepwise regression procedure, it was determined that market, trade (with Canada), labour, and crime conditions were critical place-specific criteria that affected the spatial decisions of Canadian direct investors. Par le passé, la recherche sur les investissements directs à I‘étranger (ide) du Canada a été axée sur les entrées de capital de contrôle plutôt que sur les sorties. Pourtant, les activés d'entreprises multinationales basées au Canada ont engendré“un flot impressionnant d'investissements directs à l’étranger. Pour appécier l'importance des entreprises multinationales du Canada, on doit comprendre les caractéristiques géographiques et fonctionnelles des compagnies mères canadiennes, et leurs investissements directs à l'étranger. Pour atteindre cet objectif, un échantillon de plus de 17 000 exemples de ide canadiens (à différents moments) a été choisi et analysé. Géographiquement, la cible favorite des ide canadiens vers l'extérieur a été les États-Unis, puis le Royaume-Uni, mais on retrouve d'importantes concentrations de capital de contrôle canadien en plusieurs autres parties du monde (surtout en Europe occidentale, dans la région des Caraïbes, en Australie, au Brésil etdans diverses destinations asiatiques). Pour le choix de la localisation de leurs sièges sociaux, les compagnies mères canadiennes ont nettement favorisé les plus grandes métropoles. De plus, ce sont les entreprises multinationales dont les sièges sociaux sont à Toronto et à Montréal qui gèrent la plupart (et de loin) des filiates étrangères. En général, les activités manufacturieres, financieres et minieres ont const'itue“la plus importante part des projets des multinationales canadiennes à l‘étranger. Cette tendance varie cependant selon les endroits. Par un modèle de régression, il a étéétabli que les conditions de marché, de commerce (avec le Canada), de travail et de criminalitéétaient des critères décisifs qui affectaient les choix géographiques des investisseurs canadiens. Mots-clés: investissements directs à I'étranger, entreprises multinationales du Canada  相似文献   
54.
         下载免费PDF全文
  相似文献   
55.
    
Parliaments rarely debate television serials. Such, however, was the controversy surrounding Valeriia Gai‐Germanika's 69‐part “Shkola” (“School”), shown on Russia's Channel 1 in 2010, that several Duma Deputies called for its banning. Filmed with hand‐held cameras and unknown actors, “Shkola” offered an uncompromising insight into problems afflicting Russian schools: racism, corruption, casual sex, suicide, drug‐taking, self‐harming, bullying, bribery, violence, and unremitting disorder in classrooms characterised by unimaginative teaching. “Shkola” posed unprecedented challenges to the boundaries of the permissible. This article, however, evaluates the serial's capacity to foster national cohesion, not in the “top‐down” manner characteristic of state media events such as Victory Day, but through a multi‐levelled dialectic of centre and periphery. Drawing on Jesus Martin‐Barbero's mediation theory, the article traces the dialectic through the serial narrative's split structure: its oscillation between a naturalistic aesthetic based on metonymic displacements from society's centre to specific conflicts at its margins, and a melodramatic sentimentalism suited to the metaphoric modelling of that centre and the articulation of a discourse of universal empathy. The dialectic facilitates a mutual engagement of voices (official patriotic, Soviet nostalgic, nationalist extremist, liberal oppositionalist, vernacular racist) in which each contaminates or revitalises the other and in which Gai‐Germanika's preferred universalist stance fails to prevail. The article includes an assessment of the broader implications of “Shkola” for public discourse in Russia.  相似文献   
56.
    
This paper describes the design features and capabilities of a portable automated in‐situ closed chamber (ISCC) for the quantification of CO2 fluxes in dryland soils where both photosynthetic and respiratory components may be associated with a cyanobacterial crust. The processes of CO2 flux in dryland soils are briefly described in order to clarify the conditions that make quantification of these fluxes problematic. The instrumentation currently available for in‐situ soil CO2 flux measurements is then reviewed demonstrating their inadequacies for the dryland environment. The ISCC described here is a member of the closed or enrichment class of soil respiration chambers. The ISCC, however, features an optical window possessing high (>90%) transmission in the photosynthetic active region (PAR) of the solar irradiance spectrum, permitting observations of photosynthesis. The ISCC possesses automatic venting and purging so that gaseous concentrations inside the chamber do not change from ambient sufficiently to significantly affect diffusion. The ISCC features both active and passive cooling employing internal solid‐state Peltier coolers and external aluminised Mylar respectively. This avoids severe disturbance of the microclimate within the chamber due to admission of high fluxes of PAR and permits in‐situ operation under a wide range of ambient field temperatures (~ ?5 to 40°C). Sensors internal to the chamber monitor temperature, relative humidity, irradiance and pressure. In this implementation the ISCC is coupled to a portable gas chromatograph (Agilent GC‐3000) to sample the chamber atmosphere. Indicative data for Kalahari Sand soils of Botswana are presented as an illustration of the general performance characteristics.  相似文献   
57.
    
  相似文献   
58.
    
This paper identifies external factors affecting the capacity of Australia's now‐formalised 56 regional natural resource management (NRM) bodies and their community‐based Boards to meet planning and management responsibilities. It demonstrates that little is known about the basic capacity‐related characteristics of NRM regions, despite the lengthy and elaborate process of regionalism that Australia has embarked upon, with its associated and substantial devolution of responsibilities and resources. A suite of indicators is used to develop an ‘exploratory’ capacity typology of NRM regions. The ten regional ‘types’ identified are found to attract varying budget allocations under the Natural Heritage Trust Extension and National Action Plan for Salinity and Water Quality. There are indications that State and regional interests within and outside NRM can significantly influence the distribution of resources. An examination of resources allocated to capacity‐building activities shows significant differences between regions in the scale of resources allocated (0–96% of total budget). The paper argues the case for intervention to reduce the gap between ‘have’ and ‘have not’ regions, and for further exploration of disparities in the allocation of resources to capacity‐building activities. Clarification is needed of the extent to which capacity‐building activities adequately target regional NRM bodies and their Boards.  相似文献   
59.
60.
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