We consider the following single-machine time-dependent scheduling problem with constraints on the machine availability. There is given a set of independent and deteriorating jobs Jj , 1 ≤ j ≤ n, to be processed on a single machine, starting from time t0 > 0. The processing time pj of job Jj is a proportional function of the starting time Sj of this job, pj = αjSj, where Sj ≥ t0 and deteriorati...

The main purpose of this study was to investigate effect of access to health facilities on the health status of rural households at Kermanshah Province. Statistical pupation of this study consisted of all heads of rural households at Bisotoun district in Harsin Township, Kermanshah Province, Iran (N=1020), that 278 of them were selected by the cluster random sampling method. The main instrument...