In temperate areas, lack of nutrients during summer, particularly N, is the main limiting factor of macroalgal growth.However, Nemalion helminthoides (Velley) Batters in northern Spain is conspicuous in the field during this time (from mid-May to late-July).Therefore, we assumed that its nutrient requirements are low enough to be sustained by trans

Background ;Aim : Mental health disorders are common problems among helping professionals such as nurses that create many psychosocial problems.This study aims to determine the mental health status of nursing staff.Material & Methods : it was a descriptive, cross-sectional study.All of nursing personnel (n=92 ) in Fateme Zahra hospital in Najafabad

The scheduling of gasoline-blending operations is an important problem in the oil refining industry.This problem not only exhibits the combinatorial nature that is intrinsic to scheduling problems, but also non-convex nonlinear behavior, due to the blending of various materials with different quality properties.In this work, a global optimization a