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John C. Baker ? 《The Nonproliferation Review》2013,20(1):119-123
Missile Contagion: Cruise Missile Proliferation and the Threat to International Security, by Dennis M. Gormley. Praeger Security International, 2008. 272 pages, $54.95. 相似文献
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ABSTRACTThe paper compares political territoriality of selected jihadist violent non-state actors. Looking at selected groups that attempted to control territory (Afghan Taliban, Al-Shabaab, the Islamic State), it attempts to establish a generalization regarding the use of territory by this type of violent non-state actors. To this end, it analyses connection of territory to groups´ security provision, economic activity, and identity. Despite many differences among the groups, it concludes that these groups often utilize both territorial and personal characteristics. Territoriality of these actors is reactive as they are unable to present a sustained control in contested regions. 相似文献
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Loch K. Johnson ? 《The Nonproliferation Review》2013,20(1):111-118
Spying on the Nuclear Bear: Anglo-American Intelligence and the Soviet Bomb, by Michael S. Goodman. Stanford University Press, 2007. 295 pages, $50. 相似文献
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The performance of a laser weapon system based on coherent beam combining (CBC) depends on its propagation properties in the atmosphere. In this study, an analytical model based on partial coherent beam combining (PCBC) for assumed coherence coefficients between beams in a CBC lattice was developed. The Kolmogorov model of atmospheric turbulence and the Hufnagel-Valley model of Cn2 dependence on atmospheric parameters were implemented. Novel simplified metrics were proposed to assess the CBC performance. Several beam profiles (super-Gaussian, truncated Gaussian, etc.) and ge-ometries were analyzed in terms of maximal intensity in the far field. An approximate formula for PCBC efficiency dependent on the Fried radius was proposed. The results of CBC modeling were compared to those of the Gaussian beam propagation model in a turbulent atmosphere. The dependence of CBC performance on the Cn2 parameter, range, and elevation angle was analyzed. It could be concluded that the application of CBC for medium and long range propagation is impractical without an effective adaptive optics system. 相似文献
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