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981.
The objective of this paper is to determine the effects of farm tractorisation on output and human labour employment on Punjab farms in India. The residts seem to suggest that, this far, the use of tractors has resulted in higher output and more employment. The authors believe that the threat from farm tractorisation is not all that great; the use of tractors is likely to be confined to certain areas only, and there too, any displacement of labour should be possible to control through appropriate public policies. 相似文献
982.
983.
984.
Richard G. Smethurst 《发展研究杂志》2013,49(3):205-219
985.
An experimental study of the natural sampling of trace signals from explosives concealed upon the human body was performed by taking proper account of the thermal behavior of the air surrounding the human body and the particles therein. Experiments were conducted in a dispersal chamber to identify variables affecting the detectibility of concealed RDX and TNT patches. Movement by human volunteers was found to enhance the available explosive trace signal above a baseline level. Clothing blocked some of this movement-generated trace signal. The detected signal levels were also found to vary significantly from volunteer to volunteer, indicating that human variability is an issue in explosive trace detection. Further, under the conditions studied here, the detectibility of RDX and TNT was dependent upon the efficient sampling of contaminated particulate matter, not the vapor phase. The present results are now being applied to the design of a practical, nonintrusive trace detection portal for aviation security screening and related applications. 相似文献
986.
987.
Paul A. Kowert 《管理》2001,14(2):201-232
For over two decades, the theory of groupthink proposed by Irving Janis has remained the most prominent analysis of group dynamics in policy-making. Suffering from its own popularity, groupthink has become a catch-all phrase without a clear meaning. Moreover, theories of group decision-making—even when applied to public policy-making—have typically ignored political variables, focusing almost exclusively on psychological arguments. This article offers three more narrowly construed propositions about policy-making groups: (1) that extremes in the distribution of power within a decision group reduces the integrative complexity of that group's deliberations and, thus, a leader's ability to learn; (2) that extremes in group size produce similar effects; and (3) that the integrative complexity of deliberations is improved when power concentration is appropriate to group size. An examination of the Reagan Administration's decision-making in two phases of the Iran-Contra affair lends support to these hypotheses and reveals the importance of political structure in decision group dynamics. 相似文献
988.
989.
990.
Paul J. White 《Citizenship Studies》1999,3(1):71-102
This article examines the relevancy of concepts of citizenship as tools for analysing and comprehending minorities in ethnically complex societies. Taking the Kurds of Turkey as a case study, this article traces the evolution of civil society from the Ottoman empire through to the modern Turkish state, using a human rights‐based definition of citizenship. The changed situation of the Kurds is shown in each epoch and appropriate conclusions are drawn. The complex diversity among the Kurds themselves is also noted. Finally, an assessment is made of the applicability of what could be called Weberian and Neo‐Weberian concepts of citizenship. 相似文献