We extend a heuristic method within the framework of “dynamic capacity apportionment procedure” (DCAP) to allocate an existing capacity among the classes with different profit contributions. In general, DCAP is applied when some capacity shortage exists and can not be enhanced in short - run. Our proposed approach is constructed for a make - to - order manufacturing system that produces a varie...

Results of research on roundabouts in the United States are presented in the NCHRP Report 572. The findings and recommendations of this report are important as they will be the basis of the 2010 Highway Capacity Manual methodology for operational analysis of roundabouts. This paper discusses various findings and recommendations of the NCHRP Report 572 on roundabout capacity and level of service...

As the capital of the Republic of Croatia, Zagreb is certainly the biggest motorway interchange, as well as the origin and destination of a large number of trips. Apart from obvious advantages, road traffic with its sudden development has caused certain undesired consequences as well, out of which the focus is on the traffic network congestion, including reduction of safety level, mainly becaus...

The existing works considering the flow-based discount factor in the hub and spoke problems, assume that increasing the amount of flow passing through each edge of network continuously decreases the unit flow transportation cost. Although a higher volume of flow allows for using wider links and consequently cheaper transportation, but the unit of flow enjoys more discounts, quite like replacing...

This paper examines the endogeneity (or lack thereof) of the rate of capacity utilization in the long run at the firm level. We provide economic justification for the adjustment of the desired rate of utilization toward the actual rate on behalf of a cost-minimizing firm after examining the factors that determine the utilization of resources. The cost-minimizing firm has an incentive to increas...

Local health officials are called upon every day to implement the programs, enforce the regulations, and take the actions that protect the health of the citizens in their districts. These responsibilities and duties are created and regulated by a complex interplay of federal, state, and local law. Not only is an understanding of these laws necessary to carry out public health activities on a da...

background : methamphetamine (ma) is an illegal amphetamine-like which stimulate the central nervous system. in recent years, ma has been widely abused worldwide. previous studies have suggested that oxidative stress (os) plays an important role in ma-induced toxicity. from this view, antioxidant therapy could be considered as a potential drug therapy in ma abusers. therefore, the objective of ...