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1.
This article seeks to explain the basic dynamics of the development of the German military approach in Afghanistan between 2003 and 2010 by looking at the impact of the Bundeswehr’s established uses of historical experience. First, the German military approach in Afghanistan has slowly evolved from a peacebuilding and mediation mission towards a full-fledged combat deployment. Second, the Bundeswehr’s exclusive focus on the World War II experience has contributed to the emergence of the Balkans experience as a formative experience that shaped initial operational thinking in Afghanistan. Third, because a thorough debate on the historical foundation of counterinsurgency remained absent, the operational shift in 2009 was perceived as a return to ‘classical’ military tasks and thus led to an almost exclusive focus on training for combat.  相似文献   
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The criticism of James, Solberg and Wolfson (JSW) (1999) by Oneal and Russett (OR) is not responsive to the methodologica] issues at stake. JSW argued that war is an endogenous feature of the world political and economic system. If its causes are to be measured, it must be as a structural equation in a simultaneous system. Wedded to the idea that “democracies never fight each other,” OR rely on a single equation to justify their view. JSW claim that such an equation may be an ad hoc reduced form with no causal implications unless the equation is explicitly identified as a structural equation. JSW expand the model to explain democracy and conflict as two endogenous variables. JSW do not claim to have discovered the true relationships between these variables by their minimal expansion of the structural relation. They do show that unless these (and other) variables are treated as part of a system, the results are unstable, contradictory, of minimal size and not a reliable guide to public policy.  相似文献   
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In this paper we study higher‐order Markov chain models for analyzing categorical data sequences. We propose an efficient estimation method for the model parameters. Data sequences such as DNA and sales demand are used to illustrate the predicting power of our proposed models. In particular, we apply the developed higher‐order Markov chain model to the server logs data. The objective here is to model the users' behavior in accessing information and to predict their behavior in the future. Our tests are based on a realistic web log and our model shows an improvement in prediction. © 2004 Wiley Periodicals, Inc. Naval Research Logistics, 2004  相似文献   
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This paper analyzes, from a game-theoretic standpoint, the simultaneous choice of speeds by a transitor and by an SSK which patrols back and forth perpendicular to the transitor's course. Using idealized acoustic assumptions and a cookie-cutter detection model which ignores counterdetection, we are able to present the problem as a continuous game, and to determine an analytic solution. The results indicate that with these assumptions, there are conditions under which neither a “go fast” nor a “go slow” strategy is optimal. The game provides a good example of a continuous game with a nontrivial solution which can be solved effectively.  相似文献   
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The human visual system is still an important factor in military warfare; military personnel receive training on effective search strategies, and camouflage that can effectively conceal objects and personnel is a key component of a successful integrated survivability strategy. Previous methods of camouflage assessment have, amongst others, used psychophysics to generate distinctiveness metrics. However, the population from which the human observers are drawn is often not well defined, or necessarily appropriate. In this experiment we designed a new platform for testing multiple patterns based on a camouflaged object detection task, and investigate whether trained military observers perform better than civilians. We use a two-alternative forced choice paradigm, with participants searching images of woodland for a replica military helmet displaying Olive Green, Multi Terrain Pattern, US Marine Pattern or, as a conspicuous control, UN Peacekeeper Blue. Our data show that there is no difference in detection performance between the two observer groups but that there are clear differences in the effectiveness of the different helmet colour patterns in a temperate woodland environment. We conclude that when tasks involve very short stimulus presentation times, task-specific training has little effect on the success of target detection and thus this paradigm is particularly suitable for robust estimates of camouflage efficacy.  相似文献   
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Highly fragmented insurgencies often lack explicit coordination mechanisms such as plans, direct means of communication, or hierarchical organization. Many such insurgencies nevertheless obtain a high degree of coordination that produces strategic-level effects. This article presents a theory of how coordination can emerge tacitly in highly fragmented insurgencies, and how this can produce strategic-level effects. Strategic effects emerge through a combination of complementary and supplementary tactical-level actions between commonly positioned insurgent groups. The theory is then tested again evidence from the Soviet–Afghan War. The evidence presented shows that some of the Mujahidin's strategic-level effectiveness was produced through tacit coordination.  相似文献   
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This article proposes a case study to illustrate the usefulness of sociological institutional analysis as a method to uncover ‘blue force’ challenges to deal with irregular warfare. The French Army's adaptation to revolutionary warfare in Algeria, starting in 1954, is used to illustrate both the application of the methodology and how institutional forces can hinder as well as overwhelm transformation for irregular warfare. The analysis emphasizes three key dimensions of the French Army's institutional adaptation: the regulative, normative and cognitive. These empirical elements are used to show how they interacted and influenced the institutional implementation of the French COIN structures.  相似文献   
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