This paper presents a new mathematical model for a hybrid flow shop scheduling problem with multiprocessor tasks in which sequence dependent set up times and preemption are considered. The objective is to minimize the weighted sum of makespan and maximum tardiness. Three meta-heuristic methods based on genetic algorithm (GA), imperialist competitive algorithm (ICA) and a hybrid approach of GA a...

A comprehensive study of $b\to c$ weak decays doubly heavy baryons is presented in this paper. The transition form factors as well the pole residues initial and final states are respectively obtained by investigating three-point two-point correlation functions QCD sum rules. Contributions from up to dimension-6 operators considered for functions. then applied a phenomenological analysis semi-le...

Let $G$ be a bipartite graph. In this paper we consider the two kind of location problems namely $p$-center and $p$-median problems on bipartite graphs. The $p$-center and $p$-median problems asks to find a subset of vertices of cardinality $p$, so that respectively the maximum and sum of the distances from this set to all other vertices in $G$ is minimized. For each case we present some proper...

OBJECTIVE To evaluate the effect of magnified bilateral varicocele ligation on the semen quality and natural paternity rate in subfertile men, based on the sum of varicocele grading. PATIENTS AND METHODS In a prospective longitudinal study, 78 patients (mean age 36.5 years, range 21-56) with a total of 156 varicoceles underwent bilateral varicocele ligation. Patients included had bilateral, p...

the aim of this study was to investigate the effect of 12 weeks moderate intensity aerobic exercise on leptin and c-reactive protein serum levels in obese men. the study was conducted in urmia- iran in 2015. twenty-four obese men with an aged range 40-50 yrs. were enrolled into the study. subjects were randomized to one of 2 groups exercise (n=12) and control groups (n=12). the exercise group p...