The KLU faculty, post-docs, and PhD candidates regularly publish the results of their research in scientific journals. You will find a complete overview of all KLU publications below (e.g. articles in peer-reviewed journals, professional journals, books, working papers, and conference proceedings). Search for relevant terms and keywords, or filter the list by name, year of publication or type of publication. The references include DOIs and abstracts where available, and you can download them to your own reference database or platform. We regularly update the database with new publications.
Kowalkiewicz, Marek, André Ludwig, Harald Meyer, Jan Schaffner, Christian Stamber and Sebastian Stein (2008): Service Composition and Binding, in: Kuropka, Dominik, Steffen Staab, Peter Tröger and Mathias Weske (ed.): Semantic Service Provisioning, Springer Berlin Heidelberg: Berlin, Heidelberg, 73-143.
Abstract: Service composition enables the creation of services previously unavailable through the aggregation of existing services. The result is called a service composition. Exposing a service composition as a service, the result is called a composed service. It can be distinguished from atomic services. Service composition approaches can be differentiated along two axes: point in time of composition and degree of automation. With design-time and run-time we can identify two different points in time for doing a composition. Additionally we can distinguish between three different degrees of automation: manual, assisted, and automated service composition.
Ludwig, André and Bogdan Franczyk (2008): COSMA – An Approach for Managing SLAs in Composite Services, in: Bouguettaya, Athman, Ingolf Krueger and Tiziana Margaria (ed.): Service-Oriented Computing – ICSOC 2008, Springer Berlin Heidelberg: Berlin, Heidelberg, 626-632.
Abstract: Service provisioning is largely built on agreements specifying the mutual responsibilities of service providers and their customers with respect to functional and non-functional parameters. Current SLA management approaches, i.e. WSLA, WS-Agreement, or WSOL, provide extensive SLA language formalizations and management frameworks. However, they focus on bi-lateral service requester/provider constellations neglecting the SLA management requirements of composite service providers, i.e. managing SLAs with atomic service providers and with composite service requesters and aligning both with each other. A SLA management solution for composite services has to consider the contribution of sourced services - formalized in their (atomic) SLAs (ASLA) - in the management of the provided service - formalized in its respective (composite) SLA (CSLA). This paper presents the novel COmposite Sla MAnagement (COSMA) approach for an integrated management of atomic and composite SLAs during their entire lifecycle. It can be utilized for controlling the relationships between ASLAs/CSLAs and thus serves as the basis for managing and optimizing the SLAs involved in composite services.
Becker, Jan U., Michel Clement and Oliver Schusser (2008): Piraterie in Peer-to-Peer-Netzwerken, in: (ed.): Ökonomie der Musikindustrie, 2 ed., Gabler Verlag: Wiesbaden, 211-224.
Witte, Erich H. and Niels Van Quaquebeke (2007): Sozialpsychologische Theorien zur sozialen Macht, in: Simon, Bernd (ed.): Macht: Zwischen aktiver Gestaltung und Missbrauch, Hogrefe: Göttingen, 11-26.
Friedrich, Hanno, Gernot Liedtke and Michael Spahn (2007): Die Relation zwischen Wirtschaftsakteuren als zukünftige Bezugsgröße für mikroskopische Güterverkehrsmodelle, in: Clausen, Uwe (ed.): Wirtschaftsverkehr 2007: Modelle - Strukturen - Umsetzung, Verl. Praxiswissen: Dortmund, 25-34.
Albers, Sönke and André Bielecki (2007): Einfluss der neuen Medien auf das Industriegütermarketing, in: Backhaus, Klaus and Joachim Büschken (ed.): Innovationen für das Industriegütermarketing: Festschrift für Professor Dr. Dr. h.c. Klaus Backhaus zum 60. Geburtstag, Schäffer-Poeschel: Stuttgart, 405-424.
Ludwig, André, Mariusz Momotko, Michał Gajewski, Ryszard Kowalczyk, Marek Kowalkiewicz and Jian Ying Zhang (2007): Towards Adaptive Management of QoS-Aware Service Compositions - Execution Strategies, in: (ed.): The 4th International Conference on Grid Service Engineering and Management, GSEM 2007: Leipzig, Germany, September 25, 2007 ; conference proceedings, Ges. für Informatik: Bonn, 110-122.
Abstract: Service compositions enable users to realize their complex needs as a single request. Despite intensive research, especially in the area of business processes, web services and grids, an open and valid question is still how to manage service compositions in order to satisfy both functional and non-functional requirements as well as adapt to dynamic changes. In this paper we describe an approach towards adaptive management of QoS-aware service compositions. This approach integrates well known concepts and techniques and proposes various execution strategies based on dynamic selection and negotiation of services, contracting based on service level agreements, service enactment with flexible support for exception handling, monitoring of service level objectives, and profiling of execution data.
Albers, Sönke (2007): Vertrieb, in: Köhler, Richard (ed.): Handwörterbuch der Betriebswirtschaft, 6. ed., Schäffer-Poeschel: Stuttgart, 1945-1954.
Fischer, Marc and Sönke Albers (2007): Aktuelle Enwicklungen im Customer Equity Management, in: Bayón, Tomás, Andreas Herrmann, Frank Huber and Maik Hammerschmidt (ed.): Vielfalt und Einheit in der Marketingwissenschaft, Gabler: Wiesbaden, 167-186.
Franklin, J. Rod and Dirk Reich (2006): Specifics of the International Contract Logistics Market: Three dimensions that drive differentiation, in: Stölzle, Wolfgang, Jürgen Weber and Erik Hofmann (ed.): Handbuch Kontraktlogistik, Wiley, 601-618.
Lang, Günter (2006): Konvergenzmanagement und Politik: Von der ökonomischen Logik vertikaler Integration, in: Karmasin, Matthias (ed.): Konvergenzmanagement und Medienwirtschaft, 1. ed., Fink: Paderborn, 93-104.
Momotko, Mariusz, Michał Gajewski, André Ludwig, Ryszard Kowalczyk, Marek Kowalkiewicz and Jian Ying Zhang (2006): Towards Adaptive Management of QoS-Aware Service Compositions – Functional Architecture, in: Hutchison, David, Asit Dan, Gerhard Weikum, Moshe Y. Vardi, Dough Tygar, Demetri Terzopoulos, Madhu Sudan, Bernhard Steffen, C. Pandu Rangan, Oscar Nierstrasz, Moni Naor, John C. Mitchell, Friedemann Mattern, Jon M. Kleinberg, Josef Kittler, Takeo Kanade and Winfried Lamersdorf (ed.): Service-Oriented Computing – ICSOC 2006, Springer Berlin Heidelberg: Berlin, Heidelberg, 637-649.
Abstract: Service compositions enable users to realize their complex needs as a single request. Despite intensive research, especially in the area of business processes, web services and grids, an open and valid question is still how to manage service compositions in order to satisfy both functional and non-functional requirements as well as adapt to dynamic changes. In this paper we propose an (functional) architecture for adaptive management of QoS-aware service compositions. Comparing to the other existing architectures this one offers two major advantages. Firstly, this architecture supports various execution strategies based on dynamic selection and negotiation of services included in a service composition, contracting based on service level agreements, service enactment with flexible support for exception handling, monitoring of service level objectives, and profiling of execution data. Secondly, the architecture is built on the basis of well know existing standards to communicate and exchange data, which significantly reduces effort to integrate existing solutions and tools from different vendors. A first prototype of this architecture has been implemented within an EU-funded Adaptive Service Grid project.
Lang, Günter (2006): Europa - Arbeitsmarkt ohne Grenzen. Eine Analyse des Erfolgs von Zuwanderern auf dem deutschen Arbeitsmarkt, in: Weber, Gregor (ed.): Europa im Blick: Siebtes gemeinsames Symposion der Universitäten Augsburg und Osijek, Vögel: München, 73-90.
Baur, Dirk G. (2006): A Flexible Dynamic Correlation Model, in: Terrell, Dek and Thomas B. Fomby (ed.): Econometric Analysis of Financial and Economic Time Series, Emerald: Bingley, 3-31.
Abstract: Existing multivariate generalized autoregressive conditional heteroskedasticity (GARCH) models either impose strong restrictions on the parameters or do not guarantee a well-defined (positive-definite) covariance matrix. I discuss the main multivariate GARCH models and focus on the BEKK model for which it is shown that the covariance and correlation is not adequately specified under certain conditions. This implies that any analysis of the persistence and the asymmetry of the correlation is potentially inaccurate. I therefore propose a new Flexible Dynamic Correlation (FDC) model that parameterizes the conditional correlation directly and eliminates various shortcomings. Most importantly, the number of exogenous variables in the correlation equation can be flexibly augmented without risking an indefinite covariance matrix. Empirical results of daily and monthly returns of four international stock market indices reveal that correlations exhibit different degrees of persistence and different asymmetric reactions to shocks than variances. In addition, I find that correlations do not always increase with jointly negative shocks implying a justification for international portfolio diversification.