Preface: Volume 50, Issue 1

Abstract

IntroductionAlgorithmic MeThods and Models for Optimization of RailwayS - ATMOS 2001This part of the volume contains the papers accepted for presentation, as well as the extended or short abstracts of the invited lectures by Anita Schöbel and Frank Wagner, at the Workshop on Algorithmic MeThods and Models for Optimization of RailwayS (ATMOS 2001) held in the Aldemar Knossos Royal Village Hotel, Hersonissos, Crete, Greece, on 13 July 2001, as a satellite event of ICALP 2001.Railway optimization problems are extremely complex and their efficient solution is a rather difficult task. Problems and user requirements need to be transformed into formal mathematical models that have to be as accurate as possible. Advanced mathematical methods and sophisticated algorithms are required to efficiently tackle the derived optimization problems. Development of efficient algorithms need to be alternated with experimental studies to exhibit the practical merits of the algorithms and provide useful prototype implementations. Formal models and methods need to be developed to evaluate the whole design process from requirements and specifications up to software prototyping. Consequently, the efficient solution of railway optimization problems requires a coordinated interdisciplinary effort from researchers in mathematical and combinatorial optimization, formal methods, foundations of software engineering, algorithm design, theory of computation, and algorithm engineering.The main aim of ATMOS 2001 was to provide a forum for the exchange and dissemination of new ideas, techniques, and research in the field of railway optimization. In particular, the workshop is meant to bring together researchers from the above areas interested in all aspects of algorithmic methods and models for railway optimization, including those interested in formal software specification and implementation methods, and in formal domain and knowledge models of railway systems.Papers were solicited in all aspects of algorithmic methods and models for railway optimization problems including (but not limited to): time table information, time table generation, time table on demand (disposition), railway crew scheduling and rostering, rolling stock scheduling, line planning, infrastructure and rolling stock planning, maintenance and shunting of rolling stock, pricing systems, and simulation tools.The program committe selected 5 papers in an electronic meeting conducted from April 22 to April 27. The criteria for selection were perceived originality, quality, and relevance to the subject of the workshop. Considerable effort was devoted for the evaluation of the submissions and to providing the authors with helpful feedback. Each submission was reviewed by ar least three program committee members (occasionally assisted by subreferees). However, submissions were not refereed in the thorough way that is customary for journal papers, and some of them represent reports of continuing research. It is expected that most of the papers in this volume will appear in finished form in scientific journals.We would like to thank all those who submitted papers for consideration, as well as the Program Committee members and their referees for their invaluable contribution. We gratefully acknowledge the dedicated work of ATMOS and ICALP's Organizing Committees, the support of the Computer Technology Institute, and the support of the Human Potential Programme of EU under contract no. HPRN-CT-1999-00104 (project AMORE).Patras, July 2001 Christos ZaroliagisProgram CommitteeDines BjornerTU Lyngby, DenmarkLeo KroonNS Reizigers, Utrecht, HollandAlberto Marchetti-SpaccamelaUniv. of Rome I, ItalyRolf MoehringTU Berlin, GermanyAnita SchoebelUniv. of Kaiserslautern, GermanyGabriele Di StefanoUniv. of L'Aquila, ItalyDorothea WagnerUniv. of Konstanz, GermanyFrank WagnerDeutsche Bahn, Berlin, GermanyPeter WidmayerETH Zurich, SwitzerlandChristos Zaroliagis, chairCTI & Univ. of Patras, GreeceUwe ZimmermannTU Braunschweig, Germany