Nauman A Qureshi, Norbert Seyff, Anna Perini, Satisfying user needs at the right time and in the right place: A research preview, In: REFSQ 2011, Springer, Essen, 2011-03-28. (Conference or Workshop Paper published in Proceedings)
[Context and motivation] Most requirements engineering (RE) approaches involve analysts in gathering end-user needs. However, we promote the idea that future service-based applications should support end-users in expressing their needs themselves, while the system should be able to respond to these requests by combining existing services in a seamless way. [Question/problem] Research tackling this idea is limited. In this research preview paper we sketch a plan to investigate the following research questions: How can end-users be facilitated by a system to express new needs (e.g. goals, preferences)? How can the continuous analysis of end-user needs result in an appropriate solution? [Principal ideas/results] In our recent research, we have started to explore the idea of involving end-users in RE. Furthermore, we have proposed an architecture that allows performing RE at run-time. The purpose of the planned research is to combine and extend our recent work and to come up with a tool-based solution, which involves end-users in realizing self-adaptive services. Our research objectives include to continuously capture, communicate and analyze end-user needs and feedback in order to provide a tailored solution. [Contribution] In this paper we give a preview on the planned work. After reporting on our recent work we present our research idea and the research objectives in more detail. |
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Dustin Wüest, Martin Glinz, Flexible sketch-based requirements modeling, In: 17th International Working Conference on Requirements Engineering: Foundation for Software Quality, Springer-Verlag, Berlin, Heidelberg, 2011-03-28. (Conference or Workshop Paper published in Proceedings)
[Context and motivation] Requirements engineers and stakeholders like to create informal, sketchy models in order to communicate ideas and to make them persistent. They prefer pen and paper over current software modeling tools, because the former allow for any kind of sketches and do not break the creative flow. [Question/problem] To facilitate requirements management, engineers then need to manually transform the sketches into more formal models of requirements. This is a tedious, time-consuming task. Furthermore, there is a risk that the original intentions of the sketched models and informal annotations get lost in the transition. [Principal ideas/results] We present the idea for a seamless, tool-supported transition from informal, sketchy drafts to more formal models such as UML diagrams. Our approach uses an existing sketch recognizer together with a dynamic library of modeling symbols. This library can be augmented and modified by the user anytime during the sketching/modeling process. Thus, an engineer can start sketching without any restrictions, and can add both syntax and semantics later. Or the engineer can define a domain-specific modeling language with any degree of formality and adapt it on the fly. [Contribution] In this paper we describe how our approach combines the advantages of modeling with the freedom and ease of sketching in a way other modeling tools cannot provide. |
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Bruno Staffelbach, Personalmarketing - Die internen Dauerkunden, In: NZZ, 72, p. 79, 26 March 2011. (Newspaper Article)
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Silvia Teuber, Uschi Backes-Gellner, P Ryan, K Wagner, Varieties of Capitalism and its implications on the organizational structure in engineering plants in the USA, Switzerland, The UK and Germany, In: VET Congress. 2011. (Conference Presentation)
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Simon Janssen, Uschi Backes-Gellner, Wage Flexibility and Displacement Losses, In: VET Congress. 2011. (Conference Presentation)
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Regula Geel, Uschi Backes-Gellner, Career Entry and Success After Tertiary Vocational Education, In: VET Congress. 2011. (Conference Presentation)
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Bruno Cadonna, Johann Gamper, Michael Hanspeter Böhlen, Sequenced event set pattern matching, In: 14th International Conference on Extending Database Technology, Association for Computing Machinery, New York, USA, 2011-03-22. (Conference or Workshop Paper published in Proceedings)
Event pattern matching is a query technique where a sequence of input events is matched against a complex pattern that specifies constraints on extent, order, values, and quantification of matching events. The increasing importance of such query techniques is underpinned by a significant amount of research work, the availability of commercial products, and by a recent proposal to extend SQL for event pattern matching. The proposed SQL extension includes an operator PERMUTE, which allows to express patterns that match any permutation of a set of events. No implementation of this operator is known to the authors.In this paper, we study the sequenced event set pattern matching problem, which is the problem of matching a sequence of input events against a complex pattern that specifies a sequence of sets of events rather than a sequence of single events. Similar to the PERMUTE operator, events that match with a set specified in the pattern can occur in any permutation, whereas events that match with different sets have to be strictly consecutive, following the order of the sets in the pattern specification. We formally define the problem of sequenced event set pattern matching, propose an automaton-based evaluation algorithm, and provide a detailed analysis of its runtime complexity. An empirical evaluation with real-world data shows that our algorithm outperforms a brute force approach that uses existing techniques to solve the sequenced event set pattern matching problem, and it validates the results from our complexity analysis. |
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Anja Feierabend, Das Gehirn beim Arbeiten verstehen, In: NZZ, 66, p. 81, 19 March 2011. (Newspaper Article)
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Stéphane Guérard, Robin Gustafsson, Christoph Bode, Framing contests and Institutional change: The case of the automotive field and the environmental movement in Germany, In: Seventh New Institutionalism Workshop. 2011. (Conference Presentation)
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Andreas Scherer, Emilio Marti, The Normative Foundation of Finance, In: annual VHB WK WEW workshop. 2011. (Conference Presentation)
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Daniel D Gouvêa, Cyro de A Assis D Muniz, Gilson A Pinto, Alberto Avritzer, Rosa M M Leão, Edmundo de Souza e Silva, Morganna C Diniz, Luca Berardinelli, Julius C B Leite, Daniel Mossé, Yuanfang Cai, Mike Dalton, Lucia Kapova, Anne Koziolek, Experience building non-functional requirement models of a complex industrial architecture, In: 2nd joint WOSP/SIPEW international conference on Performance engineering (ICPE'2011), Association for Computing Machinery, New York, NY, USA,, 2011-03-14. (Conference or Workshop Paper published in Proceedings)
In this paper, we report on our experience with the application of validated models to assess performance, reliability, and adaptability of a complex mission critical system that is being developed to dynamically monitor and control the position of an oil-drilling platform. We present real-time modeling results that show that all tasks are schedulable. We performed stochastic analysis of the distribution of tasks execution time as a function of the number of system interfaces. We report on the variability of task execution times for the expected system configurations. In addition, we have executed a system library for an important task inside the performance model simulator. We report on the measured algorithm convergence as a function of the number of vessel thrusters. We have also studied the system architecture adaptability by comparing the documented system architecture and the implemented source code. We report on the adaptability findings and the recommendations we were able to provide to the system's architect. Finally, we have developed models of hardware and software reliability. We report on hardware reliability results based on the evaluation of the system architecture. As a topic for future work, we report on an approach that we recommend be applied to evaluate the system under study software reliability. |
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Catia Trubiani, Anne Koziolek, Detection and solution of software performance antipatterns in palladio architectural models, In: Proceeding of the second joint WOSP/SIPEW international conference on Performance engineering, Association for Computing Machinery, 2011-03-14. (Conference or Workshop Paper published in Proceedings)
Antipatterns are conceptually similar to patterns in thatthey document recurring solutions to common design problems.Performance Antipatternsdocument, from a performance perspective, common mistakes madeduring software development as well as their solutions.The definition of performance antipatterns concerns softwareproperties that can include static, dynamic, and deploymentaspects. Currently, such knowledge is only used by domain experts;the problem of automatically detecting and solving antipatternswithin an architectural model has not been experimented yet.In this paper we present an approach to automatically detect and solvesoftware performance antipatterns within the Palladio architectural models:the detection of an antipattern providesa software performance feedback to designers, since it suggeststhe architectural alternatives that actually allow to overcomespecific performance problems. We implemented theapproach and a case study is presented todemonstrate its validity. The system performance under studyhas been improved of 50\% by applying antipatterns' solutions. |
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Helmut Max Dietl, Steuerparadiese: Fluch oder Segen?, cash zweiplus ag, cash.ch, http://www.cash.ch/news/kolumne/steuerparadiese_fluch_oder_segen-1008651-567, 2011-03-14. (Scientific Publication In Electronic Form)
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Björn Bartling, Relative performance or team evaluation? Optimal contracts for other-regarding agents, Journal of Economic Behavior & Organization, Vol. 79 (3), 2011. (Journal Article)
This paper derives optimal incentive contracts for agents with other-regarding preferences. It offers a behavioral explanation for the empirically observed lack of relative performance evaluation. We analyze a principal-multi agent model and assume that agents are inequity averse or status seeking. We show that team contracts can be optimal even if the agents’ performance measures are positively correlated such that relative performance evaluation would be optimal with purely self-interested agents and even though relative performance evaluation provides additional incentives to provide effort if agents have other-regarding preferences. Furthermore, optimal incentive contracts for other-regarding agents can be low-powered as compared to contracts for purely self-interested agents. |
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Stephan Glanz, Dieter Pfaff, Welcher Rechnungslegungsstandard? Regelungsdichte seit Einführung von IFRS stark zugenommen - Was die Auswahlkriterien sind, In: Finanz und Wirtschaft, 19, p. 21, 9 March 2011. (Newspaper Article)
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Dorit Assaf, Rolf Pfeifer, Robotics as Part of an Informatics Degree Program for Teachers, In: Society for Information Technology & Teacher Education International Conference (SITE) 2011, Association for the Advancement of Computing in Education, Chesapeake, USA, 2011. (Conference or Workshop Paper published in Proceedings)
This paper describes two robot competitions that took place within a robotics class for teachers. The robotics class was part of a two-year master's degree program that aims at educating upper secondary school teachers of different backgrounds in informatics, a discipline that is not yet a mandatory part of the school curriculum in Switzerland. The aim of these robot competitions was to familiarize the teachers with robotic hardware and software such that they would be able to design their own informatics class syllabus. We describe the robotic platforms used, the
competitions, their aims and results. Furthermore, we address the question whether robots are a suitable tool for teacher education in informatics. |
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Gudela Grote, Mehrdeutige Kommunikation, In: NZZ, 54, p. 79, 5 March 2011. (Newspaper Article)
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Delia Coculescu, Dividends and leverage: How to optimally exploit a non-renewable investment, Journal of Economic Dynamics and Control, Vol. 35 (3), 2011. (Journal Article)
In this paper we model the situation where a non-renewable investment is given, for instance a resource reservoir, and show how to optimally trade-off between dividends and leverage, in order to maximize a performance indicator for shareholders, up to the bankruptcy time. We then study the way market risk (the volatility of the market price of the resource) impacts the optimal policies and the default risk of the company. The moments when the policies are rebalanced are analyzed and we give a measure of the agency costs which appear between the shareholders and the debt-holders. |
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Steven Ongena, Alexander Popov, Interbank market integration, loan rates, and firm leverage, Journal of Banking and Finance, Vol. 35 (3), 2011. (Journal Article)
This paper investigates the effect of interbank market integration on small firm finance in the build-up to the 2007–2008 financial crisis. We use a comprehensive data set that contains contract terms on individual loans to 6047 firms across 14 European countries between 1998:01 and 2005:12. We account for the selection that arises in the loan request and approval process. Our findings imply that integration of interbank markets resulted in less stringent borrowing constraints and in substantially lower loan rates. The decrease was strongest in markets with competitive banking sectors. We also find that in the most rapidly integrating markets, firms became substantially overleveraged during the build-up to the crisis. |
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Giannina Sievi, Die Besteuerung von schweizerischen kollektiven Kapitalanlagen im internationalen Vergleich, University of Zurich, Faculty of Economics, Business Administration and Information Technology, 2011. (Master's Thesis)
In dieser Arbeit soll geklärt werden, inwiefern die Verrechnungssteuer ein Hemmnis für den Fondsstandort Schweiz darstellt, um anschliessend mögliche Lösungsansätze in Bezug auf die Umgestaltung der Verrechnungssteuer zu erarbeiten, welche die Attraktivität des schweizeri-schen Fondsplatzes steigern könnten.
Während die Verrechnungssteuer selbst bereits ein Sondernis im Vergleich zum Ausland dar-stellt, wurde die Wettbewerbsfähigkeit der Schweiz durch die Einführung von Art. 12 Abs. 1ter VStG gar weiter geschwächt.
Von den vorgeschlagen Lösungsansätzen scheinen der Ãbergang vom Schuldner- zum Zahl-stellenprinzip sowie die Abschaffung der Sockelsteuer auf Dividendenerträge in den schwei-zerischen DBA und die Ersetzung der Verrechnungssteuer für ausländische Anteilsinhaber durch eine Abgeltungssteuer jene Möglichkeiten zu sein, welche in der Realität am ehesten umsetzbar sein könnten. |
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