The problem we investigate deals with the optimal assignment of resources to the activities of a stochastic project network. We seek to minimize the expected cost of the project include sum of resource utilization costs and lateness costs. We assume that the work content required by the activities follows an exponential distribution. The decision variables of the model are the allocated resourc...

CHANNEL ASSIGNMENT AND ROUTING FOR MULTI-RADIO WIRELESS MESH NETWORKS Ahmet Murat Özdemiray M.S. in Computer Engineering Supervisor: Assist. Prof. Dr. İbrahim Körpeoğlu September, 2008 Wireless Mesh Network is a promising technology since it extends the range of wireless coverage by multi-hop transmission between routers. However, in multihop networks the total throughput decreases with increas...

The general multimodal network equilibrium problem with elastic balanced demand is studied. This problem is a combination of trip distribution, modal split and trip assignment problems. The problem is approached from an asymmetric network equilibrium point of view with side constraints. The balances for travel demand are taken as side constraints. These balances do not guarantee that the proble...

A small number of combinatorial optimization problems have search spaces that correspond to elementary landscapes, where the objective function f is an eigenfunction of the Laplacian that describes the neighborhood structure of the search space. Many problems are not elementary; however, the objective function of a combinatorial optimization problem can always be expressed as a superposition of...

Service network design problems arise at airlines (passenger and cargo), trucking companies, railroads, etc., wherever there is a need to determine cost minimizing routes and schedules, given constraints on resource availability and level of service. We focus on a particular service network design application, namely, the express shipment delivery problem, and we develop models and a solution t...

In the last years, the sensitive increase of congestion phenomena in the urban areas has produced important changes for the role reserved to the public transport. This should become the main tool to solve urban transport problem. Critical phase for the planning of the public transport system is the network design problem (determination of routes and associated frequencies). This step may affect...

The European Palliative Care Research Collaboration is updating the EAPC recommendations on opioids in cancer pain management. A systematic literature search on Medline on the use of alternative routes for opioid application identified 242 papers, with 72 publications included in the final evaluation. Two or more alternative routes of opioid application were compared in 18 papers with a total o...