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111.
The Junior Reserve Officers’ Training Corps is a high school program that combines classroom teaching with extracurricular activities. The program is located primarily in inner city schools and serves at‐risk students. Its goals are multidimensional and include military preparation and improving academic achievement. Using High School and Beyond data we find that the program’s effects depend on the timing and intensity of involvement. Test scores, graduation rates, and enlistments are higher for students who participate early in high school and for those who persist in the program. Conversely, we find few effects for students participating in the last two years of high school. 相似文献
112.
Bruce G. Linster Richard L. Fullerton Michael Mckee Stephen Slate 《Defence and Peace Economics》2013,24(4):285-302
This paper experimentally tests a number of hypotheses that follow from models of international competition that are based on Tullock style rent‐seeking models. Specifically, we designed and performed experiments to see how variations in the degree of publicness in the prize as well as changes in the values assigned to the prize affect alliances in terms of individual nation contributions, total contributions, burden sharing, and the likelihood of winning the prize. While there was substantial variation in individual behavior, the results of the experiments generally conform to the theoretical predictions of the rent‐seeking model of international competition and alliances. 相似文献
113.
Matthew V. Tompkins 《The Nonproliferation Review》2013,20(1):65-77
In 2003, the Albanian government declared that in late 2002 it had discovered a heretofore unknown cache of 16 tons of chemical weapons. Tirana requested and received assistance from the West in securing and destroying the materials, a task completed in 2007. Albania has been lauded for its responsible handling of the discovery and for being the first nation to complete the destruction of its chemical weapons under the terms of the Chemical Weapons Convention (CWC). This article argues that the Albanian government has always knowingly possessed the weapons, keeping them a secret until a post-September 11, 2001 international focus on weapons of mass destruction made it politically worthwhile for Tirana to declare and destroy them. The likelihood that the governments of the West turned a willful blind eye to this chain of events is troubling for the credibility of the CWC and confidence in nonproliferation measures in general. Finally, the author recommends measures to avoid and address similar situations in the future. 相似文献
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G. Martynenko K. Avramov V. Martynenko M. Chernobryvko A. Tonkonozhenko V. Kozharin 《防务技术》2021,17(2):478-494
The new numerical approach for analysis of the warhead transportations is suggested.This approach allows to control the warhead operability before its experimental analysis.The approach is implemented by the adequate models for the software ANSYS.Analysis of the loads at land operations and trans-portations of the warhead by natural roads,water and aviation allows to obtain the maximal values of loads,which are used in numerical simulations of the warhead.These loads give an opportunity to analyze the operability and the fatigue strength of the cartridge warhead.The numerical simulations of the attachments of the warhead combat elements are performed on the basis of the suggested method.The data of the numerical simulations verifies the operability of the fastener system of the warhead combat elements. 相似文献
116.
We consider how a merger between two naturally differentiated dealers affects their interactions with a common supplier and identify conditions under which the merger can increase or decrease the combined net worth of the two firms. Among other things, we find that the attractiveness of merging depends upon the extent to which end demand can be stimulated by either an upstream supplier or the dealers. Specifically, the greater the supplier's ability to invest in stimulating end demand, the more likely it is that the naturally differentiated firms will be better off operating independently than merging. On the other hand, if the greatest opportunities for stimulating demand are through the service that is provided by the dealers, then merging their operations will be more attractive. © 2006 Wiley Periodicals, Inc. Naval Research Logistics, 2007 相似文献
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V. Srinivasan 《海军后勤学研究》1971,18(3):317-327
In a recent paper, Hamilton Emmons has established theorems relating to the order in which pairs of jobs are to be processed in an optimal schedule to minimize the total tardiness of performing n jobs on one machine. Using these theorems, the algorithm of this paper determines the precedence relationships among pairs of jobs (whenever possible) and eliminates the first and the last few jobs in an optimal sequence. The remaining jobs are then ordered by incorporating the precedence relationships in a dynamic programming framework. Propositions are proved which considerably reduce the total computation involved in the dynamic programming phase. Computational results indicate that the solution time goes up less than linearly with the size (n) of the problem. The median solution time for solving 50 job problems was 0.36 second on UNIVAC 1108 computer. 相似文献