Centralizing and using proper transportation facilities cut down costs and traffic. Hub facilities concentrate on flows to cause economic advantage of scale and multimodal transportation helps use the advantage of another transporter. A distinctive feature of this paper is proposing a new mathematical formulation for a three-stage p-hub location routing problem with simultaneous pick-ups and de...

Customer service level is of prime importance in today competitive world and has various dimensions with delivery quality being one of the most important ones. Delivery quality has several parameters such as deliver time window options, time window size, etc. In this paper we focus on one of these parameters, namely time window setting. It has a direct impact upon customer satisfaction and busi...

In this paper, we present a simple implementation of an ambulance robot controller. The responsibility of the ambulance in the system is to transport dead robots from their current location to a nearby charging station. This helps in solving the problem of having dead robots in the environment resulting in a more robust and autonomous system. Results from a simulated MedBot controller indicate ...

A capacitated location-routing problem (CLRP) is one of the new areas of research in distribution management. It consists of two problems; locating of facilities and routing of the vehicle with a specific capacity. The purpose of the CLRP is to open a set of stores, allocate customers to established deposits, and then design vehicle tours in order to minimize the total cost. In this paper, a ne...

background prehospital management of gunshot-wounded (gw) patients influences injury-induced morbidity and mortality. objectives to evaluate prehospital management to gw patients emphasizing the protocol of patient transfer to appropriate centers. patients and methods this prospective study, included all gw patients referred to four major, level-i hospitals in mashhad, iran. we evaluated demogr...

Received Feb 14, 2017 Revised May 30, 2017 Accepted Aug 11, 2017 Ambulance location is one of the critical factors that determine the efficiency of emergency medical services delivery. Maximal Covering Location Problem is one of the widely used ambulance location models. However, its coverage function is considered unrealistic because of its ability to abruptly change from fully covered to unco...

In this paper, we present solution procedures to tackle an ambulance location problem in Austria. We consider the problem as a doublecoverage ambulance location problem, and for specifying it in formal terms, we use an extension of a model developed by Gendreau, Laporte and Semet [11] by introducing a limit on the number of inhabitants served per ambulance. To solve the problem, we reimplemente...