Aircraft routing under the risk of detection

The deterministic problem for finding an aircraft's optimal risk trajectory in a threat environment has been formulated. The threat is associated with the risk of aircraft detection by radars or similar sensors. The model considers an aircraft's trajectory in three‐dimensional (3‐D) space and represents the aircraft by a symmetrical ellipsoid with the axis of symmetry directing the trajectory. Analytical and discrete optimization approaches for routing an aircraft with variable radar cross‐section (RCS) subject to a constraint on the trajectory length have been developed. Through techniques of Calculus of Variations, the analytical approach reduces the original risk optimization problem to a vectorial nonlinear differential equation. In the case of a single detecting installation, a solution to this equation is expressed by a quadrature. A network optimization approach reduces the original problem to the Constrained Shortest Path Problem (CSPP) for a 3‐D network. The CSPP has been solved for various ellipsoid shapes and different length constraints in cases with several radars. The impact of ellipsoid shape on the geometry of an optimal trajectory as well as the impact of variable RCS on the performance of a network optimization algorithm have been analyzed and illustrated by several numerical examples. © 2006 Wiley Periodicals, Inc. Naval Research Logistics, 2006     

COMPREHENSIVE NUCLEAR-TEST-BAN TREATY

President Barack Obama has pledged to secure the ratification of the Comprehensive Nuclear-Test-Ban Treaty (CTBT), which was previously rejected by the U.S. Senate in 1999. This article attempts to predict the potential implications of Washington's ratification for the treaty's future by analyzing the positions and options of the eight other essential holdouts. The authors conclude that without the United States to hide behind, facing domestic and international constraints, and lacking substantial strategic reasons to remain outside the treaty, most holdouts will move toward ratification. Nonetheless, the process is likely to be time consuming, and several of the key actors remain unpredictable.     

Human security in Burundi: The view from below (by youth)

Firearms have played a significant role in exacerbating invidious forms of violence in Papua New Guinea. Victimisation rates in the National Capital District (NCD) are amongst the highest in the world. Port Moresby, the country's largest and fastest growing urban centre, accounts for some 34 per cent of all nationally reported crimes, despite accounting for only 5 per cent of the country's population. The Southern Highlands Province (SHP) is also rife with violent armed conflict. This feature reports on the findings from an armed violence assessment administered in NCD and SHP by the Small Arms Survey with support from the United Nations Development Programme (UNDP). This assessment yields a number of critical and counter-intuitive findings that take issue with the conventional wisdom concerning armed violence in Papua New Guinea and should influence prospective interventions to mitigate insecurity and reduce arms availability and demand.     

Fund Transfers – African Terrorists Blend Old and New: Hawala and Satellite Telecommunications

Attempts to disrupt the flow of funds through Africa used to finance terrorism have been hindered by terrorists utilizing satellite telecommunications in conjunction with hawala, an ancient system of fund transfers based on trust. This arrangement leaves few records for tracing transactions, a task made even more difficult by the general paucity of investigators trained in the languages commonly used for hawala. Acquiring personnel with the appropriate linguistic skills is one of the steps agencies can take to reduce the terrorist financing that occurs through this unique blend of an ancient system with modern technology.     

MILITARY SPENDING AND ECONOMIC GROWTH IN SOUTH ASIA: COMMENT AND RECONSIDERATION

In a recent paper in this journal, Wijewerra and Webb study the connection between military spending and gross domestic product (GDP) in a group of five South Asian countries, finding a small but statistically significant positive relationship between military spending and GDP. This paper reviews their approach and proposes an alternative which tries to deal with the problems of omitted variables and variable construction. It finds, in contrast, that a higher share of military spending in GDP is associated with lower growth of GDP per capita.     

Cinematic representations of the Mexican Narco War

This essay provides an overview of the eras of Mexican cinema followed by an analysis of 10 Spanish-language narco cinematic representations, an overview of the eras of American cinema followed by an analysis of 10 English language narco cinematic representations, and a conclusion that compares and contrasts the Mexican and US narco war cinematic experience. Due to divergent national trajectories – Mexico is engulfed in narco violence and corruption while the United States is not – more differences than similarities exist between these national cinematic genres. Dark spirituality themes are also increasingly evident in more recent narco war films.