 Irina Todoran, Zuheb Hussain, Niina Gromov, SOA Integration Modeling: An Evaluation of How SoaML Completes UML Modeling, In: 2011 15th IEEE International Enterprise Distributed Object Computing Conference Workshops, Helsinki, Finland, 2011-08-29. (Conference or Workshop Paper published in Proceedings)
 
With the new trend of shifting from traditional architectures towards Service-Oriented Architectures (SOAs) today, the need to model integration becomes increasingly apparent. This study analyzes two main approaches for SOA integration modeling: using Unified Modeling Language (UML) and Service-oriented architecture Modeling Language (SoaML); having as a fundament a literature study, an evaluation between the two is made, based on a defined set of criteria. The results show where SoaML brings added advantages to UML and why it may be worth being used on a large scale. |
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Philipp Johannes Renner, Solving Principal Agent Problems by Polynomial Programming, In: OR 2011. 2011. (Conference Presentation)
We present a new way to solve principal agent problems by polynomial programming techniques. We study the case where the agent's actions are unobservable by the principal but the outcomes are. We assume that the agent's actions lie in an interval and the space of outcomes is a finite set. Furthermore the agent's expected utility is a rational function in his actions. The resulting problem is a bilevel optimization problem with the principal's problem as the upper and the agent's problem as the lower level. The key idea is to find an exact reformulation of the agent's problem as a semidefinite optimization problem. Since this is a convex optimization problem, we then have necessary and sufficient global optimality conditions for the agent's problem. The reformulation can be done by using classical results from real algebraic geometry linking positive polynomials and semidefinite matrices. We obtain a nonlinear program. If all functions are rational functions, we then can solve it to global optimality. |
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Bruno Frey, Was kommt nach Euro und EU?, In: Frankfurter Allgemeine Zeitung, 200, p. 12, 29 August 2011. (Newspaper Article)
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Norbert Seyff, Gregor Ollmann, Manfred Bortenschlager, iRequire: Gathering end-user requirements for new apps, In: Requirements Engineering Conference (RE) 2011, Trento, 2011-08-29. (Conference or Workshop Paper)
Mobile devices such as Smartphones and Internet Tablets have become an integral part of our life. We can install applications providing various functionalities. Our research focuses on an application which enables end-users to blog requirements in situ. The gathered end-user needs can be seen as a starting point for the development of applications and the evolution of mobile platforms. |
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Dustin Wüest, Bridging the gap between requirements sketches and semi-formal models, In: Doctoral Symposium of the 19th IEEE International Requirements Engineering Conference, 2011-08-29. (Conference or Workshop Paper)
State-of-the-art requirements modeling tools rely on predefined notations. In contrast, requirements engineers and stakeholders often sketch requirements in arbitrary notations during early elicitation phases. Engineers must then manually transform the sketches into semi-formal models, which is a time-consuming and error-prone task. We propose to investigate how early sketching and the transformation of sketches can be supported by a semi-automatic method that allows engineers to assign meaning to the sketches on the fly. Our tool-supported contribution is supposed to bridge the gap between sketches and semi-formal models. |
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Robertas Zubrickas, Optimal Grading, In: 26th Annual Congress of the European Economic Association, 2011-08-25. (Conference or Workshop Paper published in Proceedings)
Assuming that teachers are concerned with human capital formation and students - with ability signaling, in this paper we model a teacher-student relationship as an agency problem with conflicting interests. In our model, the teacher elicits effort from a student rewarding for it with a grade, the utility of which to the student is the ability signal inferred by the job market. In the event that the job
market does not observe individual teachers' grading practices, teachers find grades as costless rewards and optimally choose to be lenient in grading. As a result, "the problem of the commons" of good grades emerges leading to the depreciation of grading standards and grade inflation. The prediction of the model that the lower the expectations the teacher holds about her students' abilities, the flatter the grading rules she sets up is empirically supported. |
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Robertas Zubrickas, Managerial accountability for payroll expense and firm-size wage effects, In: 26th Annual Congress of the European Economic Association, 2011-08-25. (Conference or Workshop Paper published in Proceedings)
We argue that job performance appraisal is an agency problem between a manager and his employees featuring asymmetric transfer values: Ratings given by the manager are money equivalent for the employees but only partially so for the manager. The asymmetry assumption is based on evidence that managers are not held fully accountable for payroll expense incurred, which, we argue, stems from the misalignment of managerial compensation with the profits of the firm. Other evidence also shows that the problem of managerial unaccountability is more aggravated in larger firms. In this paper, we develop a nested agency model of economic organization of a firm with unaccountable managers, which in equilibrium obtains the firm-size wage effects the large-firm wage premium and inverse relationship between firm size and wage dispersion. We also relate and explain the compression of ratings phenomenon from literature on organizational psychology. |
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Christoph Kiefer, Abraham Bernstein, Application and evaluation of inductive reasoning methods for the semantic web and software analysis, In: Reasoning Web. Semantic Technologies for the Web of Data - 7th International Summer School 2011, Springer, 2011, 2011-08-23. (Conference or Workshop Paper published in Proceedings)
Exploiting the complex structure of relational data enables to build better models by taking into account the additional information provided by the links between objects. We extend this idea to the Semantic Web by introducing our novel SPARQL-ML approach to perform data mining for Semantic Web data. Our approach is based on traditional SPARQL and statistical relational learning methods, such as Relational Probability Trees and Relational Bayesian Classifiers. We analyze our approach thoroughly conducting four sets of experiments on synthetic as well as real-world data sets. Our analytical results show that our ap- proach can be used for almost any Semantic Web data set to perform instance-based learning and classification. A comparison to kernel methods used in Support Vector Machines even shows that our approach is superior in terms of classification accuracy. |
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Sven Seuken, Mike Ruberry, Sharing in BitTorrent can be Rational [Extended Abstract], In: Proceedings of the Second Conference on Auctions, Market Mechanisms and Their Applications(AMMA), New York, NY, 2011. (Conference or Workshop Paper published in Proceedings)
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Sven Seuken, David C. Parkes, Eric Horvitz, Kamal Jain, Mary Czerwinski, Desney Tan, Market User Interface Design [Extended Abstract], In: Proceedings of the 2nd Conference on Auctions, Market Mechanisms and Their Applications (AMMA), New York, NY, 2011. (Conference or Workshop Paper published in Proceedings)
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Stefania Lottanti von Mandach, Lohnsystem und Banken-Crashes, In: NZZ, 193, p. 69, 20 August 2011. (Newspaper Article)
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Andreas Scherer, Emilio Marti, The Normative Foundation of Finance: Two Views of Problems and what they Mean for Financial Theory, In: 3rd Critical Finance Studies Conference. 2011. (Conference Presentation)
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Kjell G. Nyborg, Stabilisierung der Euro-Zone durch Besicherung von Bonds, In: Neue Zürcher Zeitung, 189, p. 23, 16 August 2011. (Newspaper Article)
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Dirk Martignoni, Challenges to identifying and implementing a good balance between exploration and exploitation, In: Academy of Management Annual Meeting 2011. 2011. (Conference Presentation)
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Christian Vögtlin, Andreas Scherer, MNCs as Political Actors in a Post-National World: Challenges and Implications for Human Resource Management, In: Academy of Management Meeting 2011. 2011. (Conference Presentation)
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Christian Vögtlin, Ina Maria Kaufmann, Neuroscience Research and Ethical Leadership: Fact or Fancy?, In: Academy of Management Meeting 2011. 2011. (Conference Presentation)
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Alexandra Arnold, Impression-Management, In: NZZ, 33, p. 97, 14 August 2011. (Newspaper Article)
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Yanmei Zhu, Xinhua Wittmann, Mike W Peng, Institution-based barriers to innovation in SMEs in China, Asia Pacific Journal of Management, Vol. 13 (8), 2011. (Journal Article)
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David Seidl, D MacLean, R MacIntosh, Rules of Suspension: A rules-based explanation of strategy workshops in the strategy process, In: Academy of Management (AoM) Annual Meeting. 2011. (Conference Presentation)
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Stéphane Guérard, Robin Gustafsson, Christoph Bode, Framing contests between the automotive field and the environmental movement in Germany, In: Academy of Management Annual Conference. 2011. (Conference Presentation)
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