The efficiency of transportation requests fulfillment can be increased through extending the problem of vehicle routing and scheduling by the possibility of subcontracting a part of the requests to external carriers. This problem extension transforms the usual vehicle routing and scheduling problems to the more general integrated operational transportation problems. In this contribution, we ana...

Vehicular Ad Hoc Network (VANET) is a part of Mobile Ad Hoc Networks (MANET). Wireless communication among vehicles and static road side infrastructure is provided by VANET. The communication among vehicles is important for comfort, safety and for entertainment purpose as well. The communication performance depends on the routing protocols that are being employed in network. In this paper, we h...

The paper examines applications of combinatorial optimization in logistics and transport, and considers some mathematical optimization problems from the perspective of Operational Research (OR). It also lists some of the numerous applications of these problems in economic reality, describes how such problems can be mathematically modelled, proposes algorithms for their solution, and presents th...

Mathematical modeling of supply chain operations has proven to be one of the most complex tasks in the field of operations management and operations research. Despite the abundance of several modeling proposals in the literature; for vast majority of them, no effective universal application is conceived. This issue renders the proposed mathematical models inapplicable due largely to the fact th...

This paper considers the implementation and evaluation of broadcast, scatter and gather communication operations in heterogeneous machines organized as a Hierarchy of Processor-And-Memory (HPAM). The top levels of the hierarchy consist of a small number of fast processors, whereas the bottom levels consist of a large number of slow processors. Each HPAM level consists of a homogeneous processor...

VANET are considered to be the special application of infrastructure-less wireless Mobile ad-hoc network (MANET). In these networks, vehicles are used as nodes. Recently Many researches has been done on this topic as a proof of which US government has recently granted permission for vehicle to vehicle communication accepting that it will be very helpful for minimizing road accidents which costs...

Safety on roadways is expected to be achieved by using vehicular ad-hoc networks (VANETs). A VANET includes dynamically moving vehicles that communicate for a certain purpose. The routing procedure in the VANET protocol is required to deliver requested data packets to the vehicles in a short period of time. Conventionally, routing algorithms like the ad-hoc on-demand vector (AODV) routing, the ...

In this paper, we study an integrated logistic system where the optimal location of depots and vehicles routing are considered simultaneously. This paper presents a new mathematical model for a multi-objective capacitated location-routing problem with a new set of objectives consisting of the summation of economic costs, summation of social risks and demand satisfaction score. A new multi-objec...

In the recent decade, special attention is paid to reverse logistic due to economic benefits of recovery and recycling of used products as well as environmental legislation and social concerns. On the other hand، many researches claim that separately and sequential planning of forward and reverse logistic causes sub-optimality. Effective transport activities are also one of the most important c...