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This paper presents a conceptual framework for understanding post-traumatic stress disorder (PTSD) and psychological battle fatigue (BF) as outcomes of mental adaptation to changing environmental conditions. These conditions are primarily linked to the experience of war, military threats, and the broader challenges of the global landscape. It is worth emphasizing that these challenges have, without exaggeration, affected the global population in 2022. The pressing need for research on PTSD and BF is driven not only by the significant shifts in global military events but also by the absence of fundamental methodological research that aligns with the demands of the 21st century. The author has identified crucial issues that form the basis for further comprehensive scientific and practical investigations. The overarching goal of this research is to develop effective methodologies and establish rehabilitation programs tailored to the specific needs of combatants, internally displaced individuals, and civilians residing in war-affected regions.

AbstractWe consider a generalized one‐dimensional bin‐packing model where the cost of a bin is a nondecreasing concave function of the utilization of the bin. Four popular heuristics from the literature of the classical bin‐packing problem are studied: First Fit (FF), Best Fit (BF), First Fit Decreasing (FFD), and Best Fit Decreasing (BFD). We analyze their worst‐case performances when they are applied to our model. The absolute worst‐case performance ratio of FF and BF is shown to be exactly 2, and that of FFD and BFD is shown to be exactly 1.5. Computational experiments are also conducted to test the performance of these heuristics. © 2006 Wiley Periodicals, Inc. Naval Research Logistics, 2006

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