This paper presents a flow capturing location problem which focuses on railway passenger flows. The flow capturing location problem (FCLP), originally proposed by Hodgson (1990), aims to locate a given number of facilities on a network to maximize the total flow that can obtain service at facilities along their pre-planned routes. For railway users, facilities located at the origin station and ...

We present approximation algorithms for integrated logistics problems that combine elements of facility location and transport network design. We first study the problem where opening facilities incurs opening costs and transportation from the clients to the facilities incurs buy-at-bulk costs, and provide a combinatorial approximation algorithm. We also show that the integer programming formul...

urban facilities are necessary components of cities. in all grown and developed cities of the world there are tremendous network of facilities such as water and electric ties, water sewage drainage, water piping and gas piping. that has not been installed in proper depth underground and locations and with growing of the cities and consumption of population. they need to be replaced by excavatin...

We address an extension of the classical multi-period facility location problem in which customers are sensitive to delivery lead times. Accordingly, two customer segments are considered. The first segment comprises customers that require timely demand satisfaction, whereas customers accepting delayed deliveries make up the second segment. Each customer belonging to the latter segment specifies...

We study the integrated logistics network design and inventory stocking problem as characterized by the interdependency of the design and stocking decisions in service parts logistics. These two sets of decisions have been usually considered sequentially in practice, and the associated problems have been tackled separately in the research literature. The overall problem is typically further com...

informational resources has emerged as an important requirement for scientific simulations using high-performance computing facilities. Both the input data and the output generated have reached levels exceeding the data management capabilities and the storage capacities of the researcher's workstation or other local facilities. We here describe FTM, a system deployed at the University of Stuttg...

In the face of an ongoing and escalating health crisis among injection drug users in Canada, calls are coming from many quarters to initiate safe injection facilities as a way to reduce overdoses, the spread of bloodborne diseases, and other health and community problems associated with injection drug use. This article summarizes a paper on safe injection facilities released in early 2002 by th...

We study the integrated logistics network design and inventory stocking problem as characterized by the interdependency of the design and stocking decisions in service parts logistics. These two sets of decisions have been usually considered sequentially in practice, and the associated problems have been tackled separately in the research literature. The overall problem is typically further com...

INTRODUCTION AND RATIONALE Influenza and pneumonia remain serious health concerns for long-term care (LTC) residents. Vaccination of LTC residents and health care workers are reasonable preventive strategies, although most facilities fall short of Healthy People 2010 goals. Improving immunization rates across multiple LTC facilities remains an elusive challenge. This quality improvement study s...

In this paper, a bi-objective mixed-integer linear optimization model for Closed-loop Supply Chain Network Design Problem (CLSCND) is developed. The proposed model includes both the forward and reverse directions and includes different types of facilities, namely, manufacturing/remanufacturing centers, warehouses, and disassembly centers. The first objective function tried to minimize the total...