We consider an uncapacitated stochastic vehicle routing problem in which vehicle depot locations are fixed and client locations in a service region are unknown, but are assumed to be independent and identically distributed samples from a given probability density function. We present an algorithm for partitioning the service region into sub-regions so as to balance the workloads of all vehicles...

Communication within and from a vehicle is a key function for various vehicle applications, like telematics, logistics, and traffic control applications. This paper describes the flexible and extendable architecture of a vehicle communication gateway which acts as a central communication device embedded in the vehicle and managing the in-vehicle, inter-vehicle, and vehicle-to-infrastructure com...

Between 1950 and 1988, the number of priefessional and technical workers increased by 282% while the labor force as a whole only increased by 94%. Most persons employed as technicians work on or with reputedly complex technologies. Most work at the empirical interface between a larger production process and the materials on which the process depends. At such interfaces, the technician's task in...

Vehicular ad-hoc network (VANET) provides vehicle to vehicle and vehicle to RSAs (Road side antennas) communication. By using Multichannel TDMA MAC protocol, once per frame each node is ensured to access the Control channel which may cause delay at the receiver end. The Proposed “Vehicle Speed Synchronized protocol” will work on Control channel as well as on Service channel. The proposed protoc...

Vehicle dispatching consists of allocating real-time service requests to a fleet of moving vehicles. In this paper, each vehicle is associated with a vector of attribute values that describes its current situation with respect to new incoming service requests. Using this attribute description, a utility function aimed at approximating the decision process of a professional dispatcher is constru...

BACKGROUND The guidelines for minimizing occupational health risk from exposure to highly infectious diseases is already established but little information exists on the compliance of these measures among paramedical workers in India. OBJECTIVE To study the awareness of occupational safety measures such as universal precautions, biomedical waste handling, disposal and its compliance in their ...

A cross-sectional study was conducted to determine the risk factors of job-related depression in laboratory technicians in Hospital Universiti Sains Malaysia (HUSM) and Kementerian Kesihatan Malaysia (KKM) Hospitals in Kelantan, between September 2001 and February 2002. One hundred and two laboratory technicians from HUSM and 79 from KKM Hospitals were selected and 84 (82.4%) from HUSM and 71 (...

A waiting system with two kinds of resources, say the vehicles and the docks in a vehiclesharing service, is considered. Two arrival flows of customers are assumed, access customers who require a vehicle versus egress customers that bring back their vehicle and require a dock at the station. The total number of docks sets a limit capacity for the service. A stochastic, markovian, state-transiti...

A structural model is provided for traffic assignment to a transit model. It deals with a hierarchy of layers from passenger to network passing by vehicle, service route and line, while taking advantage of the spatial structure of service routes and lines. A range of capacity effects are addressed: in-vehicle passenger capacity, access-egress capacity in relation to dwelling time, platform occu...

T period vehicle routing problem (PVRP) is a variation of the classic vehicle routing problem in which delivery routes are constructed for a period of time (for example, multiple days). In this paper, we consider a variation of the PVRP in which service frequency is a decision of the model. We refer to this problem as the PVRP with service choice (PVRP-SC). We explore modeling issues that arise...