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Volume IV, Number 2. November 1999

The use of fuzzy sets in the assessment of the social cost of electricity generation

S. Mirasgedis, G. Mavrotas, D. Diakoulaki. National Technical University of Athens

Environmental impacts of energy are a great source of market distortion since they impose costs on society which are not taken into account in energy decisions. Recently, significant progress is made in the development of methodologies capable of attributing costs to various types of environmental damages. However, the reliability of…
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Neural networks for railway hazard analysis

G. Bellandi. University of Pisa

R. Dulmin. University of San Marino

The ability of neural networks to learn by example instead of simply applying a set of formalised rules represents an innovative factor of great interest in terms of studying railway reliability. The proposed method overcomes the functional limits of traditional techniques of hazard rate analysis by taking into account several…
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Break-even point analysis and profit maximization with the existence of inventory, obsolesence of the inventory and the existence of escaped profits

J. Ananiadis. Aristotle's University of Thessaloniki

The purpose of the present paper is to expand on the algebraic break-even point analysis relaxing the linearity assumption. Moreover, the model developed in the paper takes into account two potential situations concerning the volume of production: Production exceeds demand, a situation which bears implications for inventory considerations, i.e., part…
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Scheme rearrangement in a genetic algorithm: Can it help assessing latent interactions?

Jacques-Marie Aurifeille. University of la Réunion

"Scheme rearrangement" was initially proposed to improve the fit and the robustness of a genetic algorithm. It was hypothesized that, in a problem comprising non linear or epistatic interactions, a greater efficiency would result from bringing closer the parameters of the interacting variables. The method was assessed, with mild success,…
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A dynamic analysis of segmented labor market

Patrice Gaubert and Marie Cottrell. Université Paris 1

Using the Panel Study of Income Dynamics data on the period 1982-1992, this paper investigates some mechanisms of the labor market in the United States. This market is analyzed as a stable structure constituted of segments which present contrasted characteristics under the usual distinction between primary and secondary sectors. Using…
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