background adolescence and youth are life-threatening stages of development when a range of unsafe behaviors can harmfully affect a person’s health and their social and educational performance. objectives the present study aimed to determine the incidence and prevalence of high-risk behaviors related to intentional and unintentional harm in adolescents of zahedan (iran). patients and methods th...

BACKGROUND There is a lack of validated instruments for quantifying feeding behavior among parents of older children and adolescents. The Comprehensive Feeding Practices Questionnaire (CFPQ) is a self-report measure to assess multiple parental feeding practices. The CFPQ is originally designed for use with parents of children ranging in age from about 2 to 8 years. It is previously validated wi...

Quadratic assignment problem (QAP) is a well-known problem in the facility location and layout. It belongs to the NP-complete class. There are many heuristic and meta-heuristic methods, which are presented for QAP in the literature. In this paper, we applied 2-opt, greedy 2-opt, 3-opt, greedy 3-opt, and VNZ as heuristic methods and tabu search (TS), simulated annealing, and pa...

it is shown in [1] that the optimal downlink radio resource allocation for non-realtime traffic in cellular cdma/tdma networks can be mapped to a multi-dimensional multiple-choice knapsack problem (mmkp) which is np-hard. in this correspondence we propose a heuristic algorithm with polynomial time complexity for this problem. numerical results indicate significant computational performance impr...

In a complex self-organizing system, small changes in the interactions between the system’s components can result in different emergent macrostructures or macro-behaviors. In chemical engineering and material science, such spontaneously self-assembling systems, using polymers, nanoor colloidal scale particles, DNA, or other precursors, are an attractive way to create materials that are precisel...

the cuckoo search algorithm is a recently developedmeta-heuristic optimization algorithm, which is suitable forsolving optimization problems. to enhance the accuracy andconvergence rate of this algorithm, an improved cuckoo searchalgorithm is proposed in this paper. normally, the parametersof the cuckoo search are kept constant. this may lead todecreasing the efficiency of the algorithm. to cop...