staff burnout in tabriz hospitals: the role of behavior types and coping strategies   badri gargari r [1] *, lotfinia h [2] , mohamadnajad r [3]    received : 16 march , 2011 accepted: 10june , 2011   abstract  background & aims: feeling burnout leads to reduced productivity in organizations and has physical and mental signs such as overreacting to minor hassles, reporting being overwhelmed, an...

Accurate measurement of behavioral functioning is a cornerstone of research on disparities in child development. This study used the National Longitudinal Survey of Youth 1979 (NLSY79) data to test measurement invariance of the Behavior Problem Index (BPI) during middle childhood across three ethnic groups. Using the internalizing and externalizing behavior problem division derived by Parcel an...

one of the most important extensions of the capacitated vehicle routing problem (cvrp) is the vehicle routing problem with simultaneous pickup and delivery (vrpspd) where customers require simultaneous delivery and pick-up service. in this paper, we propose an effective ant colony optimization (eaco) which includes insert, swap and 2-opt moves for solving vrpspd that is different with common an...

the set covering problem (scp) is a well-known combinatorial optimization problem. this paper investigates development of a local branching approach for the scp. this solution strategy is exact in nature, though it is designed to improve the heuristic behavior of the mixed integer programming solver. the algorithm parameters are tuned by design of experiments approach. the proposed method is te...