This volume contains a selection of manuscripts referring to lectures presented at the Symposium on Operations Research 1999 (SOR'99) held at the Otto-von-Guericke University Magdeburg, Sep- tember 1 -3, 1999. This international conference took place under the auspices of the German OR society (GOR), and it was the first one organized in Germany since the foundation of GOR by merger of the two predecessor societies (DGOR and GMOOR) in 1998. The Symposium had 420 participants from 22 countries around the world. It attracted academicians and practitioners working in various fields of Operations Research and provided them with the most recent developments and advances in the full spectrum of Operations Research and related areas in economics, mathematics, and computer science. The selection of contributions to SOR'99 accepted by the program committee and the invited pa- pers formed a program which consisted of 265 lectures in 19 sections, including 2 plenary and 19 semi plenary presentations. 119 manuscripts were submitted for publication in the proceedings vo- lume. Due to the page limit for this volume and in order to insure a high quality level of the OR Proceedings a further review procedure had to take place which was strongly supported by the sec- tion chairpersons. It resulted in a selection of 87 manuscripts which are now presented in this volume.

Dieses Buch ist eine praktische Einfuhrung in den Entwurf und die Programmierung von relationalen Datenbanksystemen. Es vermittelt detaillierte Kenntnisse der Datenbank-Standardsprache SQL sowie die zum Entwurf solcher Datenbanksysteme notwendigen theoretischen Grundlagen. Zahlreiche Beispiele und ausfuhrliche Ubungsaufgaben versetzen den Leser in die Lage, schon nach kurzer Zeit eigene Datenbankapplikationen - insbesondere auch fur die Integration von Datenbanken im World Wide Web - zu konzipieren. Das Buch ist besonders geeignet als Begleitlekture zu entsprechenden Lehrveranstaltungen an Universitaten und Fachhochschulen in wirtschaftswissenschaftlichen Studiengangen oder im Studiengang Informatik. Auch der Praktiker, der Datenbankkenntnisse fur Applikationsentwicklungssprachen sowie Datenbank-Administrationsaufgaben benotigt, wird sich mit diesem Buch schnell das notwendige Grundwissen aneignen. Uber das Internet konnen u. a. Musterdatenbanken und Programmlistings aus dem Buch abgerufen werden."

This volume contains the proceedings of the 1997 International Symposium on Operations Research (SOR' 97) held at the Friedrich-Schiller-Universitat Jena, Sep tember 3-5, 1997. The symposium was organized under the auspices of the two German societies on Operations Research, namely the Deutsche Gesellschajt fur Operations Research (DGOR) and the Gesellschajt fur Mathematik, Okonomie und Operations Research (GMOOR). During their annual business meetings, the DGOR and GMOOR members unanimously decided that their societies should be assimi lated by the newly founded Gesellschajt fur Operations Research (GOR). The SOR' 97 meeting was attended by 521 participants from 31 countries. The presentation of 360 papers was organized in 16 sections, each of which also saw semiplenary lectures by prominent invited speakers. Plenary lectures by J.K. Lenstra and P. Mertens as well as a panel discussion on the role of new communication media represented major academic events of the symposium. 131 papers were submitted for publication in the present volume. The space limitation and the advice of the section chairpersons only allowed for the inclusion of 85 contributed papers in the proceedings. Additionally, written versions of seven semiplenary lectures could be included in the volume. The abstracts of all 360 papers presented at the symposium can be obtained in electronic form from the WWW at http: //www.wiwLuni-jena.de/sor97.html."

Das Buch enthalt ausgewahlte Vortrage, die anlasslich des Symposiums uber Operations Research (SOR'95) in der Zeit vom 13.-15.9.1995 an der Universitat Passau gehalten wurden. Der Leser erhalt einen Einblick in neueste Forschungsergebnisse auf dem Gebiet des Operations Research. Der Sammelband demonstriert eindrucksvoll das weite Spektrum der vom Operations Research heute behandelten Thematiken. Neben primar methodischen Fragestellungen bilden praxisorientierte Themen wie Anwendungsberichte aus der Praxis, im Umweltschutz, der Logistik und Verkehrsplanung einen Schwerpunkt. Deutlich wird auch die Ausstrahlung des Operations Research in andere wissenschaftliche Disziplinen wie Informatik, Okonomie und Wirtschaftsinformatik."