there are many approaches for solving variety combinatorial optimization problems (np-compelete) that devided to exact solutions and approximate solutions. exact methods can only be used for very small size instances due to their expontional search space. for real-world problems, we have to employ approximate methods such as evolutionary algorithms (eas) that find a near-optimal solution in a r...

Objectives The present study determined the correlation of self-concept and self-efficacy with self-management among elderly in the sanatoriums in Tehran in2015. Methods & Materials This descriptive-analytic research, conducted in a cross-sectional study, enrolled 217 elderlies from the sanatoriums of Tehran in 2015 via a simple random sampling method. Three tools including Rogers self-concept...

a simple, rapid and low-cost scanner spectroscopy method for the glucose determination by utilizing glucose oxidase and cdte/tga quantum dots as chromoionophore has been described. the detection was based on the combination of the glucose enzymatic reaction and the quenching effect of h2o2 on the cdte quantum dots (qds) photoluminescence.in this study glucose was determined by utilizing glucose...

Introduction: Professional self-concept is the individual's perception of self as a professional person and it affects his/her thinking, role development, and professional function. In recent years, improving self-concept has been discussed as a global aim in higher education, especially in nursing discipline. Thus, this study was conducted to examine the effect of an educational-orientation pr...

for a given riemannian manifold (m,g),it is an interesting question to study the existence of a conformal diffemorphism (also called as a conformal transformation) f : m ! m such that the metric g? = fg has one of the following properties: (i)(m; g?) has constant scalar curvature. (ii)(m; g?) is an einstein manifold.