We propose that there exists an important difference between attainment and maintenance in terms of the goal pursuit strategies for which they call. Specifically, we propose that goal attainment calls for the use of eager approach strategies, whereas goal maintenance calls for the use of vigilant avoidance strategies. We distinguish between attainment versus maintenance as two different goal pu...

In this paper, an assistant tool for the maintenance of rails in a metro context for normal steel wheeled trains is proposed. The theory of Dynamic Bayesian Networks offers an interesting frame to solve this specific problem. We present a modular modelling of the current rails’ diagnostic process. It simulates the rail degradation, the behavior of the various actors involved in the defect detec...

In order to investigate identity maintenance strategies used by a low status group, a covert participant observation study was conducted in a shelter for the homeless. From Social Identity Theory and previous research on the homeless, it was hypothesized that the identity maintenance strategies used would di€er as a function of longevity of homelessness: the shortterm homeless (52 years) would ...

Multi-robot teams composed of ground and aerial vehicles have gained attention during the last few years. We present a scenario where both types of robots must monitor the same area from different view points. In this paper, we propose two Lloyd-based tracking strategies to allow the ground robots (agents) to follow the aerial ones (targets), keeping the connectivity between the agents. The fir...

This paper provides an application of Data Envelopment Analysis (DEA) to the measurement of the relative efficiency of highway maintenance operations within 200 miles of Virginia’s Interstate highways maintained by VDOT using traditional maintenance practices and 250 miles of Virginia’s Interstate highways maintained via a PPP (Public Private Partnership) using a performance-based maintenance s...

Optimal preventive maintenance and repairmen policies for a system of machines subject to degradation with age and intermittent breakdowns and repairs are derived using optimal control theory. When this system of machines forms part of a dynamic process control system, a method of obtaining optimal closed-loop control law is indicated. I . INTRODUC~ON Many large industrial systems have two dist...

This paper discusses automation of maintenance of belt conveyor systems, in particular of idler rolls. Automation of maintenance is a promising alternative for outsourcing maintenance, in particular when looking at the efficiency, accuracy, and costs. In order to optimise maintenance efforts, the concept of intelligent maintenance is introduced. The powered maintenance trolley that can travel a...

BACKGROUND Weight regain after weight loss is a common problem for all those obese or overweight who have had a recent weight loss. Different cures such as diet therapy, behavioral therapy, exercise or a mixture of them have been advised as solutions. The purpose of this review is to find the best diet or eating pattern to maintain a recent weight loss. MATERIALS AND METHODS WE SEARCHED IN PU...

Heavy equipment overhaul facilities such as aircraft service centers and rail-yards face the challenge of minimizing the makespan for a set of preventive maintenance (PM) tasks, requiring singleor multiple-skills, within workforce availability constraints. In this paper, we examine the utility of evolution strategies (ES) to this problem. Comparison of the computational efforts of ES with exhau...