Christoph Kiefer, Abraham Bernstein, Jonas Tappolet, Analyzing Software with iSPARQL, In: Proceedings of the 3rd International Workshop on Semantic Web Enabled Software Engineering (SWESE 2007), Springer, June 2007. (Conference or Workshop Paper)
 
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 Christoph Kiefer, Imprecise SPARQL: Towards a Unified Framework for Similarity-Based Semantic Web Tasks, In: Proceedings of 2nd Knowledge Web PhD Symposium (KWEPSY) colocated with the 4th Annual European Semantic Web Conference (ESWC), June 2007. (Conference or Workshop Paper)
This proposal explores a unified framework to solve Semantic Web tasks that often require similarity measures, such as RDF retrieval, ontology alignment, and semantic service matchmaking. Our aim is to see how far it is possible to integrate user-defined similarity functions (UDSF) into SPARQL to achieve good results for these tasks.We present some research questions, summarize the experimental work conducted so far, and present our research plan that focuses on the various challenges of similarity querying within the Semantic Web. |
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Domenic Benz, Voraussage von Benutzerverhalten in dynamischen Umgebungen, University of Zurich, Faculty of Economics, Business Administration and Information Technology, 2007. (Master's Thesis)
The increasing proliferation of mobile phones has a significant influence on our daily lifes. Allthough the increasing use of mobile devices has brought several advantages, it also has the negative effect of unwanted disturbance and interruptions. It is desirable that a mobile phone has the ability to adapt to the current situation it is in. For such an adaption to become possible, the mobile phone would need to have information about its current context. To achieve this goal, a software is implemented which gathers data from a variety of sensors on a mobile phone. This software is then being used in a prototype experiment. In this experiment we try to determine if it is possible to predict a users activity and location based on the collected data. The software implemented in this thesis and the results of the experiment help to prepare and conduct follow-up experiments in the field of context awareness and human interuptibility research. |
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Sinja Helfenstein, Visualizing Labor Market Dynamics based on Social Security Records A Combination of Temporal and Visual Data Mining, University of Zurich, Faculty of Economics, Business Administration and Information Technology, 2007. (Master's Thesis)
The goal of this thesis is the understanding of temporal patterns in the Austrian Social Security Database to derive labor market dynamics. As these structures are very complex, conventional data mining approaches turned out to be inadequate for interpretation and knowledge discovery. The main challenge is the intuitive representation of the time dimension. Therefore, we keep the time dimension by generating movies of concatenated probabilistic model visualizations. Using this combination of temporal and visual data mining allows us to identify various effects such as seasonal hiring cycles, gender and age-related employment dynamics, and demographic influences. |
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Armon Pfister, Datenintegration von heterogenen Datenquellen im Semantic Web, University of Zurich, Faculty of Economics, Business Administration and Information Technology, 2007. (Master's Thesis)
Semantic Web Applications describe their data as RDF graphs. They differ in this regard in the choice of the ontology, in the way they annotate data and how they provide their RDF data. In addition, heterogeneities in the data itself exist. This work introduces an architecture and a prototype for an infrastructure that integrates RDF data from various heterogeneous sources into a central knowledge base while dealing with heterogeneity. The main focus of this work addresses the latter by identifying similarity relations between RDF resources. An ontology designed by our-selves for creating similarity definitions will be presented and its application exemplified. |
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Fabian Ruishauser, Global Sourcing International Project Management Guidelines based on an IT Case Study, University of Zurich, Faculty of Economics, Business Administration and Information Technology, 2007. (Master's Thesis)
Software development is becoming increasingly international. In particular, many large projects cannot be undertaken cost-effectively in the customer’s home country. The issues in international projects, arising from the heterogeneity of cultures and irtualization of communication, are widespread and complex. They predominantly affect the management of people and their interaction, but also project organization and documentation require special attention. This diploma thesis deals with the implementation of large scale software projects in a global sourcing strategy. Using a case study on a large project involving the Swiss and Indian subsidiary of a multinational IT company, we look for the main issues that are occurring in real life projects. This basis is combined with theoretical work on culture and management to create guidelines on how to manage such projects in a cost-efficient way. |
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Jürg Syz, Demographic Issues, In: Conference on Financial Innovation for Societal Risks. 2007. (Conference Presentation)
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Helmut Max Dietl, Egon Franck, Sind Fussball-Schiedsrichter parteiisch?, In: Neue Zürcher Zeitung, 119, p. 57, 25 May 2007. (Newspaper Article)
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Siddharth Kaza, Daning Hu, Hsinchun Chen, Dynamic social network analysis of a dark network: Identifying significant facilitators, In: the 5th IEEE Conference on Intelligence and Security Informatics, IEEE, New Brunswick, New Jersey, 2007-05-23. (Conference or Workshop Paper published in Proceedings)
"Dark Networks" refer to various illegal and covert social networks like criminal and terrorist networks. These networks evolve over time with the formation and dissolution of links to survive control efforts by authorities. Previous studies have shown that the link formation process in such networks is influenced by a set of facilitators. However, there have been few empirical evaluations to determine the significant facilitators. In this study, we used dynamic social network analysis methods to examine several plausible link formation facilitators in a large-scale real-world narcotics network. Multivariate Cox regression showed that mutual acquaintance and vehicle affiliations were significant facilitators in the network under study. These findings provide insights into the link formation processes and the resilience of dark networks. They also can be used to help authorities predict co-offending in future crimes. |
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Thomas Bocek, Management of Biometric Data in a Distributed Internet Environment, In: 10th IFIP/IEEE International Symposium on Integrated Network Management (IM 2007). 2007. (Conference Presentation)
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Siddharth Kaza, Daning Hu, Homa Atabakhsh, Hsinchun Chen, Predicting criminal relationships using multivariate survival analysis, In: International conference on Digital government research, ACM, Proceedings of the 8th annual international conference on Digital government research, 2007-05-20. (Conference or Workshop Paper published in Proceedings)
Criminal networks evolve over time with the formation and dissolution of links to survive control efforts by government authorities. Previous studies have shown that the link formation process in such networks is influenced by a set of facilitators. However, there have been few empirical evaluations to determine the significant facilitators. In this study, we used dynamic social network analysis methods to examine several plausible link formation facilitators in a large-scale real-world narcotics network. Multivariate Cox regression showed that mutual
acquaintance and vehicle affiliations were significant facilitators in the network under study. The findings shown in this poster can help government authorities automatically predict co-offending relationships in future crimes. |
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S Eilemann, Renato Pajarola, Direct send compositing for parallel sort-last rendering, In: Eurographics Symposium on Parallel Graphics and Visualization, 2007-05-20. (Conference or Workshop Paper published in Proceedings)
In contrast to sort-first, sort-last parallel rendering has the distinct advantage that the task division for parallel
geometry processing and rasterization is simple, and can easily be incorporated into most visualization systems.
However, the efficient final depth-compositing for polygonal data, or alpha-blending for volume data of partial
rendering results is the key to achieve scalability in sort-last parallel rendering. In this paper, we demonstrate
the efficiency as well as flexibility of the direct send sort-last compositing algorithm, and compare it to existing
approaches, both in a theoretical analysis and in an experimental setting. |
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Matthias Göhner, Martin Waldburger, Fabian Gubler, Gabi D Rodosek, Burkhard Stiller, An accounting model for dynamic virtual organizations, In: An Accounting Model for Dynamic Virtual Organizations, IEEE, 2007-05-14. (Conference or Workshop Paper)
The provisioning of remote and composed services in support of various application areas has dramatically increased over recent times. Thus, the concept of Grids has evolved, in the sense of a common platform for electronic service provisioning in multi-domain environments. While, traditionally, Grids have seen a quite static existence, many new service compositions have to take place on-demand and for certain periods of time only. To tackle those issues the concept of Virtual Organizations (VO) delivers a highly suitable representation of such dynamic Grids. However, one important open problem at this stage is the lack of applicable, distributed, and efficient accounting schemes for commercial resource and service consumptions. Even for simple management purposes, e.g., sampling or archiving, this functionality is essential. Therefore, a comprehensive model for Grid accounting has been developed and suitable accountable units have been defined, in which an underlying activity- and resource-based accounting model covers economic cost theory. Furthermore, this work is based on a service model proposed for service provisioning in dynamic VOs, overcoming the typically static nature of traditional Grids. |
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Uschi Backes-Gellner, B Wolff, Personalökonomik, In: Handwörterbuch der Betriebswirtschaft, Schäffer-Poeschel, Stuttgart, p. 1371 - 1382, 2007-05-10. (Book Chapter)
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Martin Waldburger, Matthias Göhner, Burkhard Stiller, Accounting Model for Dynamic Virtual Organizations, In: Seventh IEEE International Symposium on Cluster Computing and the Grid (CCGrid 2007),, 2007. (Conference or Workshop Paper published in Proceedings)
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Burkhard Stiller, Accounting and Charging for IP Services, In: IEEE Distingushed Experts Presentation. 2007. (Conference Presentation)
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Thomas Bocek, Fast Similarity Search in Large Dictionaries, In: ETH doctoral seminar. 2007. (Conference Presentation)
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Michael Elsenberger, Bewertung von Joint Ventures mittels Realoptionsansatz, University of Zurich, Faculty of Economics, Business Administration and Information Technology, 2007. (Bachelor's Thesis)
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Angelo Ranaldo, Charlotte Christiansen, Realized bond-stock correlation: Macroeconomic announcement effects, Journal of Futures Markets, Vol. 27 (5), 2007. (Journal Article)
The authors investigate the effects of macroeconomic announcements on the realized correlation between bond and stock returns. It was found that it is not so much the surprise component of the announcement, but the mere fact that an announcement occurs that influences the realized bond—stock correlation. The impact of macroeconomic announcements varies across the business cycle. Announcement effects are highly dependent on the sign of the realized bond—stock correlation, which has recently gone from positive to negative. Macroeconomic announcement effects on realized bond and stock volatilities are also investigated. Our results are robust across 8:30 A.M. and 10:00 A.M. announcements. |
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Egon Franck, Stephan Nüesch, Avoiding "Star Wars" - Celebrity creation as media strategy, Kyklos, Vol. 60 (2), 2007. (Journal Article)
Media companies generally enjoy increasing profits if more customers watch a program. The viewer drawing capability of stars serves as a prominent instrument to increase the audience. The literature distinguishes between two different types of stars: highly talented and therefore ‘self-made’ superstars, and famous but ‘manufactured’ and thus rather trivial celebrities. Whereas ‘self-made’ superstars attract viewers by providing services of superior quality, ‘manufactured’ celebrities draw attention by fabricated fame. Illustrating the Pop Idol series and comparing the abilities of superstars and celebrities to generate and to capture value, we show why ‘manufacturing’ celebrities is a lucrative business for the media. |
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