 Carlos Alos-Ferrer, Klaus Ritzberger, Trees and extensive forms, Journal of Economic Theory, Vol. 143 (1), 2008. (Journal Article)
 
This paper addresses the question of what it takes to obtain a well-defined extensive form game. Without relying on simplifying finiteness or discreteness assumptions, we characterize the class of game trees for which all pure strategy combinations induce unique outcomes. The generality of the set-up covers “exotic” cases, like stochastic games or decision problems in continuous time (differential games). We find that the latter class, though a well-defined problem, fails this test. |
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Carlos Alos-Ferrer, Simon Weidenholzer, Contagion and efficiency, Journal of Economic Theory, Vol. 143 (1), 2008. (Journal Article)
We consider a population of agents, either finite or countably infinite, located on an arbitrary network. Agents interact directly only with their immediate neighbors, but are able to observe the behavior of (some) other agents beyond their interaction neighborhood, and learn from that behavior by imitating successful actions. If interactions are not “too global” but information is fluid enough, we show that the efficient action is the only one which can spread contagiously to the whole population from an initially small, finite subgroup. This result holds even in the presence of an alternative, $\nicefrac{1}{2}$-dominant action. |
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Cristian Morariu, A Distributed Architecture for IP Traffic Analysis, In: Joint EMANICS/IRTF-NMRG Workshop on Netflow/IPFIX Usage in Network Management. 2008. (Conference Presentation)
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Thomas Vettiger, Rudolf Volkart, Methodische Arbeitsweise sorgt für objektive Unternehmensbewertung, io new management (11), 2008. (Journal Article)
Der Discounted-Cash-Flow-Ansatz hat sich durchgesetzt. Er bewahrt aber nur vor subjektiven Fehlbewertungen, wenn verschiedene Details stringent beachtet werden. |
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Thorsten Hens, Was lernt die Lehre aus der Finanzmarktkrise?, In: Neue Zürcher Zeitung, Sonder, p. SB 27, 29 October 2008. (Newspaper Article)
Die weltweite Finanzkrise hat die Frage aufgebracht, in welche
Richtung die Finance-Theorie weiterentwickelt werden soll,
nachdem einige Ansätze offensichtlich in die Sackgasse geführt
haben. Im folgenden Text fasst ein Finance-Wissenschafter, der
an vorderster «Forschungsfront» tätig ist, erste Erkenntnisse für die Lehre zusammen. |
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Beat Hotz-Hart, Innovationsleistungsfähigkeit der Wirtschaft: hohes Niveau bei mässiger Dynamik, In: Neue Zürcher Zeitung, 253, p. 92, 29 October 2008. (Newspaper Article)
Zwar schneidet die Schweiz bei Innovationen punkto Intensität mässig ab, kompensiert dies aber deutlich durch eine hohe Effizienz. Allerdings liegt nach Ansicht des Autors Potenzial brach. |
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Alberto Bacchelli, Paolo Ciancarini, Davide Rossi, On the effectiveness of manual and automatic unit test generation, In: The Third International Conference on Software Engineering Advances (ICSEA), IEEE, Los Alamitos, CA, US, 2008. (Conference or Workshop Paper published in Proceedings)
The importance of testing has recently seen a significant growth, thanks to its benefits to software design (e.g. think of test-driven development), implementation and maintenance support. As a consequence of this, nowadays it is quite common to introduce a test suite into an existing system, which was not designed for it. The software engineer must then decide whether using tools which automatically generate unit tests (test suites necessary foundations) and how. This paper tries to deal with the issue of choosing the best approach. We will describe how different generation techniques (both manual and automatic) have been applied to a real case study. We will compare achieved results using several metrics in order to identify different approaches benefits and shortcomings. We will conclude showing the measure how the adoption of tools for automatic test creation can shift the trade-off between time and quality. |
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K Kaljurand, ACE View - an ontology and rule editor based on controlled English, In: 7th International Semantic Web Conference (ISWC2008), 2008-10-26. (Conference or Workshop Paper published in Proceedings)
We describe the architecture of a novel ontology and rule editor ACE View. The goal of ACE View is to simplify viewing and
editing expressive and syntactically complex OWL/SWRL knowledge bases by making most of the interaction with the knowledge base happen via Attempto Controlled English (ACE). This makes ACE View radically different from current OWL/SWRL editors which are based on formal logic syntaxes and general purpose graphical user interface widgets. ACE View integrates two mappings, ACE →OWL/SWRL and OWLACE, and is implemented as a plug-in for Protégé 4. |
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T Kuhn, Combining semantic wikis and controlled natural language, In: 7th International Semantic Web Conference (ISWC 2008), 2008-10-26. (Conference or Workshop Paper)
We demonstrate AceWiki that is a semantic wiki using the controlled natural language Attempto Controlled English (ACE). The goal is to enable easy creation and modification of ontologies through the web. Texts in ACE can automatically be translated into first-order logic and other languages, for example OWL. Previous evaluation showed that ordinary people are able to use AceWiki without being instructed. |
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Amancio Bouza, G Reif, Abraham Bernstein, Harald Gall, SemTree: ontology-based decision tree algorithm for recommender systems, In: International Semantic Web Conference, 2008-10-26. (Conference or Workshop Paper)
Recommender systems play an important role in supporting people when choosing items from an overwhelming huge number of choices. So far, no recommender system makes use of domain knowledge. We are modeling user preferences with a machine learning approach to recommend people items by predicting the item ratings. Specifically, we propose SemTree, an ontology-based decision tree learner, that uses a reasoner and an ontology to semantically generalize item features to improve the effectiveness of the decision tree built. We show that SemTree outperforms comparable approaches in recommending more accurate recommendations considering domain knowledge. |
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S Ferndriger, Abraham Bernstein, J S Dong, Y Feng, Y F Li, J Hunter, Enhancing semantic web services with inheritance, In: 7th International Semantic Web Conference (ISWC 2008), Springer, Berlin / Heidelberg, 2008-10-26. (Conference or Workshop Paper published in Proceedings)
Currently proposed Semantic Web Services technologies allow the creation of ontology-based semantic annotations of Web services so that software agents are able to discover, invoke, compose and monitor these services with a high degree of automation. The OWL Services (OWL-S) ontology is an upper ontology in OWL language, providing essential vocabularies to semantically describe Web services. Currently OWL-S services can only be developed independently; if one service is unavailable then finding a suitable alternative would require an expensive and difficult global search/match. It is desirable to have a new OWL-S construct that can systematically support substitution tracing as well as incremental development and reuse of services. Introducing inheritance relationship (IR) into OWL-S is a natural solution. However, OWL-S, as well as most of the other currently discussed formalisms for SemanticWeb Services such as WSMO or SAWSDL, has yet to define a concrete and self-contained mechanism of establishing inheritance relationships among services, which we believe is very important for the automated annotation and discovery of Web services as well as human organization of services into a taxonomy-like structure. In this paper, we extend OWL-S with the ability to define and maintain inheritance relationships between services. Through the definition of an additional “inheritance profile”, inheritance relationships can be stated and reasoned about. Two types of IRs are allowed to grant service developers the choice to respect the “contract” between services or not. The proposed inheritance framework has also been implemented and the prototype will be briefly evaluated as well. |
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Thomas Scharrenbach, End-user assisted ontology evolution in uncertain domains, In: The Semantic Web - ISWC 2008, 7th International Semantic Web Conference, Springer, Heidelberg, 2008-10-26. (Conference or Workshop Paper published in Proceedings)
Learning ontologies from large text corpora is a well understood task while evolving ontologies dynamically from user-input has rarely been adressed so far. Evolution of ontologies has to deal with vague or incomplete information. Accordingly, the formalism used for knowledge representation must be able to handle this kind of information. Classical logical approaches such as description logics are particularly poor in adressing uncertainty. Ontology evolution may benefit from exploring probabilistic or fuzzy approaches to knowledge representation. In this thesis an approach to evolve and update ontologies is developed which uses explicit and implicit user-input and extends probabilistic approaches to ontology engineering. |
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Robert Göx, Die Regulierung der Managergehälter schadet meist mehr, als sie nützt, In: NZZ, 250, p. 29, 25 October 2008. (Newspaper Article)
Im Zuge der Bankenkrise ist der Ruf nach einer schärferen Regulierung der Managergehälter laut geworden. Der Autor zeigt, dass staatliche Vorschriften in der Vergangenheit kaum je nützten und häufig unerwünschte Nebenwirkungen hatten. Erfolgversprechender wäre, den Aktionären mehr Kontrollrechte in Vergütungsfragen zu geben. |
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Martin Janssen, Claude Baumann, Gefährlicher als die UBS, In: Weltwoche, 44, p. 60 - 63, 23 October 2008. (Newspaper Article)
Der Finanzprofessor Martin Janssen schliesst nicht aus, dass die grösste Schweizer Bank noch mehr Kapital benötigt. Konsequenzen aber habe die Finanzkrise vor allem für unser Vorsorgesystem. Die Pensionskassen seien eine Zeitbombe. |
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C Kutasi, Managementbeurteilung als Grundlage der internen Nachfolgeplanung für das Topmanangement. Analyse von Mikropolitik, University of Zurich, Faculty of Economics, Business Administration and Information Technology, 2008. (Dissertation)
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Hans Geiger, Leverage Ratio: gut für den Finanzplatz, Schweizer Bank (11), 2008. (Journal Article)
Warum die Argumente der Gegner einer Mindest-Leverage-Ratio für die Schweizer Grossbanken nicht stichhaltig sind. |
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Philipp Schlegel, Renato Pajarola, Layered Volume Splatting, In: Posters IEEE Visualization Conference, Columbus, US, 2008. (Conference or Workshop Paper)
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P Mahler, Attraktivität schlägt sich im Lohn nieder, In: Neue Zürcher Zeitung: Beilage NZZ executive, 244, p. 79, 18 October 2008. (Newspaper Article)
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Öttl Sonja, Joachim Pfister, Niklaus Stettler, Martin Studer, Bruno Wenk, Garden Memory Goes Public: ein ontologiebasiertes Informationssystem zur Gartendenkmalpflege, In: 30. DGI Online-Tagung, Frankfurt am Main, Germany, 2008. (Conference or Workshop Paper published in Proceedings)
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Yu Zhou, Michael Würsch, Emanuel Giger, Harald Gall, Jian Lü, A Bayesian Network Based Approach for Change Coupling Prediction, In: Working Conference on Reverse Engineering, 2008-10-15. (Conference or Workshop Paper published in Proceedings)
Source code coupling and change history are two important data sources for change coupling analysis. The popularity of public open source projects in recent years makes both sources available. Based on our previous research, in this paper, we inspect different dimensions of software changes including change significance or source code dependency levels, extract a set of features from the two sources and propose a bayesian network-based approach for change coupling prediction. By combining the features from the co-changed entities and their dependency relation, the approach can model the underlying uncertainty. The empirical case study on two medium-sized open source projects demonstrates the feasibility and effectiveness of our approach compared to previous work. |
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