Abraham Bernstein, Esther Kaufmann, Christoph Bürki, Mark Klein, Object Similarity in Ontologies: A Foundation for Business Intelligence Systems and High-performance Retrieval, In: Twenty-Fifth International Conference on Information Systems, December 2004. (Conference or Workshop Paper)
Finding good algorithms for assessing the similarity of complex objects in ontologies is central to the functioning of techniques such as retrieval, matchmaking, clustering, data-mining, semantic sense disambiguation, ontology translations, and simple object comparisons. These techniques provide the basis for supporting a wide variety of business intelligence computing tasks like finding a process in a best practice repository, finding a suitable service provider/outsourcing partner for agile process enactment, dynamic customer segmentation, semantic web applications, and systems integration. To our knowledge, however, there exists no study that systematically compares the prediction quality of ontology based similarity measures. This paper assembles a catalogue of ontology based similarity measures that are (partially) adapted from related domains. These measures are compared to each other within a large, real-world best practice ontology as well as evaluated in a realistic business process retrieval scenario. We find that different similarity algorithms reflect different notions of similarity. We also show how a combination of similarity measures can be used to improve both precision and recall of an ontology-based, query-by-example style, object retrieval approach. Combining the study’s findings with the literature we argue for the need of extended studies to assemble a more complete catalogue of object similarity measures that can be evaluated in many applications and ontologies. |
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Abraham Bernstein, Esther Kaufmann, Norbert E. Fuchs, June von Bonin, Talking to the Semantic Web -- A Controlled English Query Interface for Ontologies, In: 14th Workshop on Information Technology and Systems, December 2004. (Conference or Workshop Paper)
The semantic web presents the vision of a distributed, dynamically growing knowledge base founded on formal logic. Common users, however, seem to have problems even with the simplest Boolean expression. As queries from web search engines show, the great majority of users simply do not use Boolean expressions. So how can we help users to query a web of logic that they do not seem to understand?
We address this problem by presenting a natural language front-end to semantic web querying. The front-end allows formulating queries in Attempto Controlled English (ACE), a subset of natural English. Each ACE query is translated into a discourse representation structure – a variant of the language of first-order logic – that is then translated into the semantic web querying language PQL. As examples show, our approach offers great potential for bridging the gap between the semantic web and its real-world users, since it allows users to query the semantic web without having to learn an unfamiliar formal language. |
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Trea Laske-Aldershof, Erik Schut, Konstantin Beck, Stefan Gress, Amir Shmueli, Carine Van de Voorde, Consumer mobility in social health insurance markets: a five-country comparison, Applied Health Economics and Health Policy, Vol. 3 (4), 2004. (Journal Article)
During the 1990s, the social health insurance schemes of Germany, the Netherlands, Switzerland, Belgium and Israel were significantly reformed by the introduction of freedom of choice (open enrolment) of health insurer. This was introduced alongside a system of risk adjustment to compensate health insurers for enrolees with predictable high medical expenses. Despite the similarity in the health insurance reforms in these countries, we find that both the rationale behind these reforms and their impact on consumer choice vary widely.
In this article we seek to explain the observed variation in switching rates by cross-country comparison of the potential determinants of health insurer choice. We conclude that differences in choice setting, and in the net benefits of switching, offer a plausible explanation for the large differences in consumer mobility.
Finally, we discuss the policy implications of our cross-country comparison. We argue that the optimal switching rate crucially depends on the goals of the reforms and the quality of the risk-adjustment system. In view of this, we conclude that switching rates are currently too low in the Netherlands, and an active government policy to encourage consumer mobility seems warranted. In Germany and Switzerland, high switching rates call for an improvement of the rather poor risk-adjustment systems. Given low switching rates in Israel and Belgium, improving risk adjustment is less urgent, but still required in the long run. |
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Daniel Fasnacht, Der neue Schub kommt oft unerwartet, In: Neue Zürcher Zeitung , 274, p. 11, 23 November 2004. (Newspaper Article)
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Thomas Gschwind, Martin Pinzger, Harald Gall, TUAnalyzer--Analyzing Templates in C++ Code, In: Proceedings of the 11th Working Conference on Reverse Engineering (WCRE 2004), IEEE Computer Society, November 2004. (Conference or Workshop Paper published in Proceedings)
In this paper, we present TUAnalyzer, a novel tool that extracts the template structure of C++ programs on the basis of the GNU C/C++ Compiler’s internal representation of a C/C++ translation unit. In comparison to other such tools, our tool is capable of supporting the extraction of function invocations that depend on the particular instantiation of C++ templates and to relate them to their particular template instantiation. TUAnalyzer produces RSF format output that can be easily fed into existing visualization and analysis tools such as Rigi or Graphviz. We motivate why this kind of template analysis information is essential to understand real-world legacy C++ applications. We present how our tool extracts this kind of information to allow others to build on our results and further use the template information. The applicability of our tool has been validated on real code as proof of concept. The results obtained with TUAnalyzer enable us and other approaches and tools to perform detailed studies of large (open source) C/C++ projects in the near future. |
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Peter Zweifel, Improved risk information, the demand for cigarettes, and anti-tobacco policy, Journal of Risk and Uncertainty, Vol. 23 (3), 2004. (Journal Article)
This paper purports to develop a simple microeconomic model designed to shed light on behavioral change induced by improved information about smoking risks. It predicts the conditions in which improved information indeed increases the demand for cigarettes. After recalling the economic rationale of an anti-tobacco policy, the article points out a few startling implications of improved information about the risks of smoking. |
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Mathias Hoffmann, International capital mobility in the long run and the short run: can we still learn from saving–investment data?, Journal of International Money and Finance, Vol. 23 (1), 2004. (Journal Article)
The idea to learn about international capital mobility from saving and investment data remains appealing. Our approach is based on VAR methods and overcomes some of the problems associated with saving–investment regressions when the data are non-stationary. We propose a new measure of long-run capital mobility that can be easily calculated as a by-product of the estimation procedure of a cointegrated VAR. In an application to historical US and British data, we find long-run capital mobility to have been remarkably stable over the century whereas variations in the mobility of capital primarily seem to have affected short-run capital flows. |
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Andrea Schenker-Wicki, Qualität messen – Qualität managen: Leistungsparameter im Studium, In: Jahreskonferenz des Projekts Qualitätssicherung, 2004-10-26. (Conference or Workshop Paper)
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Reto Föllmi, Urs Meister, Konsum hängt nicht von Bahn und Bus ab. Kritik an Studie zum Nutzen des öffentlichen Verkehrs, In: Neue Zürcher Zeitung, 248, p. 17, 23 October 2004. (Newspaper Article)
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Günter Müller, Torsten Eymann, Norbert Nopper, Sven Seuken, EMIKA System: Architecture and Prototypic Realization, In: Proceedings of the IEEE International Conference on Systems, Man and Cybernetics (SMC), The Hague, The Netherlands, 2004. (Conference or Workshop Paper published in Proceedings)
Life critical applications in hospital
environments have got special requirements concerning
IT support: a real-time cooperation is necessary to ensure
a continuous workflow. This article describes the
prototypic realization of the EMIKA project, a real-time
controlled mobile information system for clinical
applications. The EMIKA architecture is comprised of
three layers: first of all, the Communication Layer
provides wireless device interaction. Secondly, the
Middleware Layer establishes a common service platform
for automated service provision and access. Finally, the
Application Layer implements a multi-agent-system for
the real-time coordination needed for a self-organizing
patient logistics environment. |
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Andrea Schenker-Wicki, Marco Demont, MBA Rankings unter der Lupe: Rankings hinterfragen, In: Alpha - Der Kadermarkt der Schweiz, p. ?, 9 October 2004. (Newspaper Article)
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Thorsten Hens, Beate Pilgrim, Sunspot equilibria and the transfer paradox, Economic Theory, Vol. 24 (3), 2004. (Journal Article)
We show that for international economies with two countries, in which agents have additively separable utility functions, the existence of sunspot equilibria is equivalent to the occurrence of the transfer paradox. This equivalence enables us to provide some new insights on the relation of the existence of sunspot equilibria and the multiplicity of spot market equilibria. |
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Helmut Schauer, Interactive Learning, In: Netties 2004 Conference, Budapest, Hungary, October 2004. (Conference or Workshop Paper)
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Andrea Schenker-Wicki, Performance Management, Die Bestimmung der Performance im Public Management - Theorie und Praxis, In: Fachtagung, Kompetenzzentrum für Public Management der Universität. 2004. (Conference Presentation)
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Marc Chesney, Monique Jeanblanc, Pricing American currency options in an exponential Lévy model, Applied Mathematical Finance, Vol. 11 (3), 2004. (Journal Article)
In this article the problem of the American option valuation in a Lévy process setting is analysed. The perpetual case is first considered. Without possible discontinuities (i.e. with negative jumps in the call case), known results concerning the currency option value as well as the exercise boundary are obtained with a martingale approach. With possible discontinuities of the underlying process at the exercise boundary (i.e. with positive jumps in the call case), original results are derived by relying on first passage time and overshoot associated with a Lévy process. For finite life American currency calls, the formula derived by Bates or Zhang, in the context of a negative jump size, is tested. It is basically an extension of the one developed by Mac Millan and extended by Barone‐Adesi and Whaley. It is shown that Bates' model generates pretty good results only when the process is continuous at the exercise boundary. |
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Betriebliche Personalpolitik im technologischen und organisatorischen Innovationsprozess, Edited by: Uschi Backes-Gellner, M Kräkel, Rainer Hampp Verlag, München und Mering, 2004-09-15. (Edited Scientific Work)
Technologische und organisatorische Innovationen stellen heutzutage große Anforderungen an eine moderne Personalpolitik und andere Bereiche der Unternehmenspolitik. Sie können auf betriebliche Geschäftsstrategien ebenso Einfluss ausüben wie auf die Veränderung von Unternehmensgrenzen und ziehen in der Regel erhebliche personelle Konsequenzen in quantitativer und qualitativer Hinsicht nach sich. Die vorliegende Arbeit behandelt Fragen der betrieblichen Personalpolitik in einem von technologischen und organisatorischen Änderungen geprägten Umfeld. Technische und organisatorische Innovationen werden dabei als Haupteinflussfaktoren von internen und externen Strategien der Personalanpassung angesehen. Im Vordergrund stehen die Auswirkungen technologischer und organisatorischer Innovationen auf die betriebliche Humankapitalintensität, die betriebliche Ausbildungsbereitschaft, das Ausmaß der betrieblichen Weiterbildung im Vergleich zu Personalaustauschmaßnahmen sowie die betriebliche Altersstruktur. Die einzelnen Fragestellungen werden mithilfe ökonometrischer Methoden analysiert, wobei stets auf die moderne Personalökonomie als theoretische Basis zurückgegriffen wird. Die empirischen Ergebnisse belegen, dass die Betriebe im technologischen und organisatorischen Innovationsprozess personalpolitische Strategien ergreifen, die immer mehr zu einer Heterogenisierung des Faktors Arbeit beitragen. Dabei ist nicht nur ein skill-biased technological change bzw. skill-biased organizational change festzustellen, sondern technologische und organisatorische Innovationen begünstigen darüber hinaus auch eine Verjüngung der Belegschaftsstruktur in den Betrieben. Ein weiteres zentrales Ergebnis ist die große Bedeutung von Komplementaritäten zwischen personal- und anderen unternehmenspolitischen Entscheidungen, woraus sich als unmittelbare Konsequenz die Organisation von Komplementaritäten als vorrangige Aufgabe der betrieblichen Personalpolitik in der Zukunft ergibt. |
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Khai Truong, Elaine May Huang, Gregory Abowd, CAMP: A magnetic poetry interface for end-user programming of capture applications for the home, In: UbiComp, Germany, 2004. (Conference or Workshop Paper published in Proceedings)
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K Beck, Risikoausgleich – verkanntes Stiefkind: Eine Schlüsselgrösse im System des KVG, In: Neue Zürcher Zeitung, 205, p. 17, 3 September 2004. (Newspaper Article)
Neun Jahre Wettbewerb unter den Krankenversicherungen brachten nicht die erhofften kostendämpfenden Effekte. Schuld daran ist, wie der Autor des folgenden Beitrags darlegt,
eine verfehlte Wettbewerbsregulierung, die dem sogenannten Risikoausgleich zwischen den Krankenversicherern zu wenig Beachtung schenkt. |
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Fabio Rinaldi, Gerold Schneider, Kaarel Kaljurand, James Dowdall, Christos Andronis, Andreas Persidis, Ourania Konstanti, Mining relations in the GENIA corpus, In: Proc. of the Second European Workshop on Data Mining and Text Mining for Bioinformatics, Pisa, Italy, September 2004. (Conference or Workshop Paper)
Discovering the interactions between genes and proteins is
seen as one of the core tasks in molecular biology. The
quantity of research results in this area is growing at such a
rate that it is very di?cult for individual researchers to keep
track of them. As such results appear mainly in the form
of scienti?c articles, it is necessary to process them in an
e?cient manner in order to be able to extract the relevant
results.
Many databases exist that aim at consolidating the newly
gained knowledge in a format that is easily accessible and
searchable, however the creators of such databases normally
make use of human readers who manually ‘curate’ the rel-
evant papers. This is an expensive and time consuming
process, besides, there might be a signi?cant time lag be-
tween the publication of a result and its introduction into
such databases.
In this paper we propose a method for discovery of inter-
actions between genes and proteins from the scienti?c liter-
ature, based on a complete syntactic analysis of the corpus.
We report on preliminary results. |
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Konstantin Beck, Ute Kunze, Willy Oggier, Selbstdispensation: Kosten treibender oder Kosten dämpfender Faktor?, Care Management (6), 2004. (Journal Article)
Ein Blick in die Literatur zeigt: Der Einfluss der Selbstdispensation(SD) auf die Medikamentenkosten ist äusserst umstritten. Die vorliegende Arbeit unterzieht diesen Zusammenhang einer erneuten Prüfung. |
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