This paper presents “Magnebots ”, a simple yet novel concept for overhead transportation. The system consists of vehicles with magnetic wheels that move on trackless ferromagnetic walls and ceilings, driven by on -board controllers and commanded by a central computer. Magnebots is designed to be a fundamentally simple technology that can fulfill many generic transportation needs including facto...

Scheduling is an important subject of production and operations management area. In flow-shop scheduling, the objective is to obtain a sequence of jobs which when processed in a fixed order of machines, will optimize some well defined criteria. The concept of transportation time is very important in scheduling. Transportation can be done by robots. In situations that robots are used to transpor...

In this paper we provide a compact, formal description for an important class of problems involving the deployment of diverse equipment (e.g., planes, ships, trucks) to transport cargo (e.g., personnel and material) throughout large geographical areas for private, government, and military purposes. The problem is particularly interesting for its combination of static and dynamic sources of comp...

In this paper we provide a compact, formal description for an important class of problems involving the deployment of diverse equipment (e.g., planes, ships, trucks) to transport cargo (e.g., personnel and material) throughout large geographical areas for private, government, and military purposes. The problem is particularly interesting for its combination of static and dynamic sources of comp...

BACKGROUND AND OBJECTIVE Workers in the transportation sector may be expose to environmental hazards resulting in adverse health outcomes. The present study aimed to assess environmental-hazard-related morbidity among transportation workers over an eight-year period MATERIAL AND METHOD Data were extracted from the registry database of a cohort of workers in the Expressway Authority of Thailan...

Introduction: Statement of the Problem: Cleaning and shaping are regarded as the most important aspects of root canal therapy and prerequisite for the success of endodontic treatment. Apical transportations can jeopardize the outcome of treatment due to the significant decrease in the sealing ability of root filling material. The purpose of this study was to evaluate transportation in type II c...

This study compared the shaping ability of five Ni-Ti rotary files (ProTaper Universal, Reciproc, Hyflex CM, ProTaper Next and TF Adaptive) in simulated root canals. Each group consisted of 10 root canals. Preand post-instrumentation photographs were taken using a precise camera and superimposed with Photoshop. Material removal from the inner and outer canal walls, transportation and centering ...

This paper describes the application of multiobjective heuristic search algorithms to the problem of hazardous material (hazmat) transportation. The selection of optimal routes inherently involves the consideration of multiple conflicting objectives. These include the minimization of risk (e.g. the exposure of the population to hazardous substances in case of accident), transportation cost, tim...

a value chain is a series of events that takes a raw material and with each step adds value to it. global interest in the application of natural gas (ng) in production and transportation has grown dramatically, representing a long-term, low-cost, domestic, and secure alternative to petroleum-based fuels. many technological solutions are currently considered on the market or in development, whic...

The paper is f ocusing on analysis of manufacture trans port devices development tendency, as well as s pecial requires resulting both evolution and aut omation processes of manufacture systems. Material handling syste ms development is strongly supported via Infor mation Technology expansion. Devel opment areas of transport devices (material handling) have been discussed on the base on conveyo...