 Franck Rousseau, Yan Grunenberger, Vincent Untz, Eryk Jerzy Schiller, Paul Starzetz, Fabrice Theoleyre, Martin Heusse, Olivier Alphand, Andrzej Duda, An architecture for seamless mobility in spontaneous wireless mesh networks, In: Proceedings of 2nd ACM/IEEE International Workshop on Mobility in the Evolving Internet Architecture (MobiArch), ACM Press, New York, New York, USA, 2007-09-27. (Conference or Workshop Paper published in Proceedings)
 
In this paper, we consider spontaneous wireless mesh networks that can provide wide coverage connectivity to mobile nodes. Our mobility scheme builds upon separation between a persistent node identifier and its current address. When joining the mesh, a mobile node associates with a mesh router that updates a location service managed in the mesh as a distributed hash table. Mobility implies changing addresses while a node moves in the mesh. To keep the rate of location updates and correspondent node notifications low, the address of the new mesh router with which the mobile node is associated needs to be topologically close to the previous one. Thus, such a mobility scheme requires an addressing space with specific properties. We achieve this by defining an algorithm for constructing a pseudo-geographical addressing space: a few nodes know their exact locations and others estimate their relative positions to form a topologically consistent addressing space. Such an addressing space also enables scalable and low overhead routing in the wireless mesh---we propose a trajectory based long distance ballistic geographical routing. |
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Thomas Weinhold, Lydia Bauer, Josef Herget, Sonja Hierl, Joachim Pfister, CHEVAL: Chur Evaluation Laboratory, In: European Conference on Information Management and Evaluation (ECIME), Academic Conferences Ltd, Montpellier, 2007. (Conference or Workshop Paper published in Proceedings)
Incorporating novel approaches like visual components, semantic web ideas or Web 2.0 concepts into information retrieval systems poses new challenges for their systematic evaluation. Currently, the development of valid evaluation settings cannot keep up with the development of new search engines and innovative information retrieval concepts. Therefore, the Swiss Institute for Information Research (SII), is currently developing a testbed called CHEVAL (Chur Evaluation Laboratory) to tackle this problem. The vision of CHEVAL is to design an integrated, multi-level and multi-methodological web-based system and framework to support different kinds of evaluation types (e.g. usability tests, IR efficiency measurement, benchmarking studies etc.) of several types of information retrieval systems. In the context of CHEVAL, an evaluation can have multiple dimensions regarding the type of the evaluation (long-term or short-term test phase, comparative or non-comparative evaluation, field or laboratory test environment) and the methods used for the evaluation, which can either be from IR efficiency measurement or usability testing as well as a combination of both. The paper will give an overview of some well-known and widely accepted evaluation initiatives. This also includes background information about the history of these initiatives. Furthermore the strengths and weaknesses of the described evaluation initiatives will be presented and discussed. Based on the deficiencies of current approaches for evaluating information retrieval systems with visual or semantic components the vision and the goals of the Chur Evaluation Laboratory will be explained. Following, the architecture of the testbed will be introduced. An example will illustrate how the system is intended to be used and what advantages CHEVAL will give to evaluators of information retrieval systems. Finally, the paper will present the success factors and a short roadmap for the further development of the Chur Evaluation Laboratory. |
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Andrea Schenker-Wicki, F Heinzmann, Finanzierung der wissenschaftlichen Weiterbildung im Zusammenhang mit berufsbegleitenden Masterprogrammen der Universität Zürich, In: Jahrestagung 2007, Deutsche Gesellschaft für wissenschaftliche Weiterbildung und Fernstudium e.V. DGWF. 2007. (Conference Presentation)
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Elaine May Huang, Khai Truong, Understanding the paradigm of disposable technology: What happens to old mobile phones?, In: UbiComp 2007. 2007. (Conference Presentation)
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Elaine May Huang, When does the public look at public displays, In: UbiComp 2007, 2007. (Conference or Workshop Paper)
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Helmut Max Dietl, Egon Franck, Wie Märkte für Sportwetten funktionieren, In: Neue Zürcher Zeitung, p. 59, 14 September 2007. (Newspaper Article)
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David Seidl, Paul Sanderson , Comply or Explain: The Flexibility of Corporate Governance Codes in Theory and in Practice, In: 2nd Annual Cambridge Conference on Regulation, Inspection & Improvement. 2007. (Conference Presentation)
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Lorenz Hilty, CO2 Reduction with ICT: Prospects and Barriers, In: Shake, Shaker Verlag, Aachen, 2007. (Conference or Workshop Paper)
The challenge of climate change calls for a systematic effort to utilize ICT for CO2 reduction. This paper shows that the effects of ICT applications on CO2 emissions are manifold and demonstrates a systematic approach to deal with this variety. The approach combines a standard life-cycle approach with a classification of ICT effects in first- to third-order effects. It is applied to the fields of ICT application that are discussed in literature as candidate fields for ICT-related CO2 reduction. High reduction potentials are identified in the following fields: data centers, mobile phone networks, electronic waste recycling, intelligent space heating, virtual meetings, and the organization of services where consumption is traditionally linked with product ownership. Finally, current barriers preventing the exploitation of these potentials are discussed. |
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Martin Waldburger, Burkhard Stiller, Regulatory issues for mobile grid computing in Europe, In: 18th European Regional ITS Conference (ITS 2007), 2007-09-04. (Conference or Workshop Paper)
Regulatory issues for communications and value-added services determine a key requirement of study to ensure that a competitive and fair commercial usage within a legal domain can be achieved. Therefore, this paper pursues a comprehensive study identifying the key mobile grid regulations on a European level, while such grid services are considered to be of major importance for upcoming value-added services. The focus is put mainly on those regulatory determinations affecting areas neglected by the eCommunications framework, namely the areas of value-added services in mobile grids and of determinations governing relations among service providers and between service consumers and service providers. Thus, the major achievement here outlines the potential for open and unregulated mobile grid applications as well as services markets. Due to the lack of eCommunications determinations— as shown in a previous study [38]—, this new work ensures the careful consideration of fundamental consumer rights and competition efficiency for value-added services. |
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Martin Waldburger, Burkhard Stiller, Regulatory Issues for Mobile Grid Computing in Europe, In: 18th European Regional ITS Conference (ITS 2007), Istanbul, Turkey, 2007. (Conference or Workshop Paper published in Proceedings)
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B Solenthaler, Y Zhang, Renato Pajarola, Efficient refinement of dynamic point data, In: Eurographics/ACM Symposium on Computer Animation, 2007-09-02. (Conference or Workshop Paper published in Proceedings)
Particle simulations as well as geometric modeling techniques have demonstrated their ability to process and
render points interactively. However, real-time particle-based fluid simulations suffer from poor rendering quality due to low surface particle resolutions. Surfaces appear blobby, surface details are lost, and features like edges are degraded due to smoothing effects. This paper presents a novel point refinement method for irregularly sampled, dynamic points coming from a particle-based fluid simulation. Our interpolation algorithm can handle complex
geometries including splashes, and at the same time preserves features like edges. Point collisions are avoided
resulting in a nearly uniform sampling facilitating surface reconstruction techniques. No point preprocessing
is necessary, and point neighborhoods are dynamically updated reducing computation and memory costs. We
show that our algorithm can efficiently detect and refine the surface points of a fluid and we demonstrate the
improvement of rendering quality and applicability to real-time simulations. |
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M Botsch, Renato Pajarola, C Baoquan, M Zwicker, Proceedings Symposium on Point-Based Graphics, In: Symposium on Point-Based Graphics, Eurographics/IEEE Computer Society VGTC, Aire-la-Ville, Switzerland, 2007-09-02. (Conference or Workshop Paper published in Proceedings)
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Simon Broda, a S.A.F.E.approach to risk: Saddlepoint Approximations in Financial Econometrics., University of Zurich, Faculty of Business, Economics and Informatics, 2007. (Dissertation)
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Bruno Balasubramaniam, Nutzen einer steuerlichen Due Diligence bei Unternehmensakquisitionen, University of Zurich, Faculty of Economics, Business Administration and Information Technology, 2007. (Bachelor's Thesis)
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Marco Arcari, Kunstderivate, University of Zurich, Faculty of Economics, Business Administration and Information Technology, 2007. (Bachelor's Thesis)
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Ellen Locher, Finanzierung von Nachfolgeregelung bei KMU, University of Zurich, Faculty of Economics, Business Administration and Information Technology, 2007. (Bachelor's Thesis)
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Sergio Günthardt, Gschlossene Immobilienfonds, University of Zurich, Faculty of Economics, Business Administration and Information Technology, 2007. (Bachelor's Thesis)
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Manfred Klenner, Enforcing Consistency on Coreference Sets, In: In Recent Advances in Natural Language Processing (RANLP), September 2007. (Conference or Workshop Paper)
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Nicolas Honegger, Robert Stoyan, Helmut Schauer, Learning from the Effectiveness of Open Source Teams, In: IRNOP Conference – International Research Network on Organizing by Projects, University of Brighton, UK, Sep 2007. (Conference or Workshop Paper)
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Abraham Bernstein, Jayalath Ekanayake, Martin Pinzger, Improving defect prediction using temporal features and non linear models, In: Proceedings of the International Workshop on Principles of Software Evolution, IEEE Computer Society, Dubrovnik, Croatia, 2007-09-01. (Conference or Workshop Paper published in Proceedings)
Predicting the defects in the next release of a large software system is a very valuable asset for the pro ject manger to plan her resources. In this paper we argue that temporal features (or aspects) of the data are central to prediction performance. We also argue that the use of non-linear models, as opposed to traditional regression, is necessary to uncover some of the hidden interrelationships between the features and the defects and maintain the accuracy of the prediction in some cases. Using data obtained from the CVS and Bugzilla repositories of the Eclipse pro ject, we extract a number of temporal features, such as the number of revisions and number of reported issues within the last three months. We then use these data to predict both the location of defects (i.e., the classes in which defects will occur) as well as the number of reported bugs in the next month of the pro ject. To that end we use standard tree-based induction algorithms in comparison with the traditional regression. Our non-linear models uncover the hidden relationships between features and defects, and present them in easy to understand form. Results also show that using the temporal features our prediction model can predict whether a source file will have a defect with an accuracy of 99% (area under ROC curve 0.9251) and the number of defects with a mean absolute error of 0.019 (Spearman’s correlation of 0.96). |
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