TY - THES A1 - Appeltauer, Malte T1 - Extending Context-oriented Programming to New Application Domains: Run-time Adaptation Support for Java Y1 - 2012 CY - Potsdam ER - TY - THES A1 - Bog, Anja T1 - Benchmarking composite transaction and analytical processing systems : the creation of a mixed workload benchmark and its application in evaluating the impact of database schema optimizations in mixed workload scenarios Y1 - 2012 CY - Potsdam ER - TY - JOUR A1 - Bordihn, Henning A1 - Kutrib, Martin A1 - Malcher, Andreas T1 - On the computational capacity of parallel communicating finite automata JF - International journal of foundations of computer science N2 - Systems of parallel finite automata communicating by states are investigated. We consider deterministic and nondeterministic devices and distinguish four working modes. It is known that systems in the most general mode are as powerful as one-way multi-head finite automata. Here we solve some open problems on the computational capacity of systems working in the remaining modes. In particular, it is shown that deterministic returning and non-returning devices are equivalent, and that there are languages which are accepted by deterministic returning and centralized systems but cannot be accepted by deterministic non-returning centralized systems. Furthermore, we show that nondeterministic systems are strictly more powerful than their deterministic variants in all the four working modes. Finally, incomparability with the classes of (deterministic) (linear) context-free languages as well as the Church-Rosser languages is derived. KW - Automata systems KW - cooperating systems KW - formal languages KW - theory of computation Y1 - 2012 U6 - https://doi.org/10.1142/S0129054112500062 SN - 0129-0541 VL - 23 IS - 3 SP - 713 EP - 732 PB - World Scientific CY - Singapore ER - TY - THES A1 - Broß, Justus F. M. T1 - Understanding and leveraging the social physics of the blogosphere Y1 - 2012 CY - Potsdam ER - TY - JOUR A1 - Brückner, Michael A1 - Kanzow, Christian A1 - Scheffer, Tobias T1 - Static prediction games for adversarial learning problems JF - Journal of machine learning research N2 - The standard assumption of identically distributed training and test data is violated when the test data are generated in response to the presence of a predictive model. This becomes apparent, for example, in the context of email spam filtering. Here, email service providers employ spam filters, and spam senders engineer campaign templates to achieve a high rate of successful deliveries despite the filters. We model the interaction between the learner and the data generator as a static game in which the cost functions of the learner and the data generator are not necessarily antagonistic. We identify conditions under which this prediction game has a unique Nash equilibrium and derive algorithms that find the equilibrial prediction model. We derive two instances, the Nash logistic regression and the Nash support vector machine, and empirically explore their properties in a case study on email spam filtering. KW - static prediction games KW - adversarial classification KW - Nash equilibrium Y1 - 2012 SN - 1532-4435 VL - 13 SP - 2617 EP - 2654 PB - Microtome Publishing CY - Cambridge, Mass. ER - TY - JOUR A1 - Fabian, Benjamin A1 - Kunz, Steffen A1 - Konnegen, Marcel A1 - Müller, Sebastian A1 - Günther, Oliver T1 - Access control for semantic data federations in industrial product-lifecycle management JF - Computers in industry : an international, application oriented research journal N2 - Information integration across company borders becomes increasingly important for the success of product lifecycle management in industry and complex supply chains. Semantic technologies are about to play a crucial role in this integrative process. However, cross-company data exchange requires mechanisms to enable fine-grained access control definition and enforcement, preventing unauthorized leakage of confidential data across company borders. Currently available semantic repositories are not sufficiently equipped to satisfy this important requirement. This paper presents an infrastructure for controlled sharing of semantic data between cooperating business partners. First, we motivate the need for access control in semantic data federations by a case study in the industrial service sector. Furthermore, we present an architecture for controlling access to semantic repositories that is based on our newly developed SemForce security service. Finally, we show the practical feasibility of this architecture by an implementation and several performance experiments. KW - Access control KW - Data federation KW - Information integration KW - Product lifecycle management KW - Semantic data Y1 - 2012 U6 - https://doi.org/10.1016/j.compind.2012.08.015 SN - 0166-3615 VL - 63 IS - 9 SP - 930 EP - 940 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Gabrysiak, Gregor A1 - Giese, Holger A1 - Seibel, Andreas T1 - Towards next-generation design thinking II : virtual muti-user software prototypes Y1 - 2012 ER - TY - JOUR A1 - Gebser, Martin A1 - Kaufmann, Benjamin A1 - Schaub, Torsten H. T1 - Conflict-driven answer set solving: From theory to practice JF - Artificial intelligence N2 - We introduce an approach to computing answer sets of logic programs, based on concepts successfully applied in Satisfiability (SAT) checking. The idea is to view inferences in Answer Set Programming (ASP) as unit propagation on nogoods. This provides us with a uniform constraint-based framework capturing diverse inferences encountered in ASP solving. Moreover, our approach allows us to apply advanced solving techniques from the area of SAT. As a result, we present the first full-fledged algorithmic framework for native conflict-driven ASP solving. Our approach is implemented in the ASP solver clasp that has demonstrated its competitiveness and versatility by winning first places at various solver contests. KW - Answer set programming KW - Logic programming KW - Nonmonotonic reasoning Y1 - 2012 U6 - https://doi.org/10.1016/j.artint.2012.04.001 SN - 0004-3702 VL - 187 IS - 8 SP - 52 EP - 89 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Gebser, Martin A1 - Kaufmann, Benjamin A1 - Schaub, Torsten H. T1 - Multi-threaded ASP solving with clasp JF - Theory and practice of logic programming N2 - We present the new multi-threaded version of the state-of-the-art answer set solver clasp. We detail its component and communication architecture and illustrate how they support the principal functionalities of clasp. Also, we provide some insights into the data representation used for different constraint types handled by clasp. All this is accompanied by an extensive experimental analysis of the major features related to multi-threading in clasp. Y1 - 2012 U6 - https://doi.org/10.1017/S1471068412000166 SN - 1471-0684 VL - 12 IS - 8 SP - 525 EP - 545 PB - Cambridge Univ. Press CY - New York ER - TY - JOUR A1 - Gericke, Lutz A1 - Gumienny, Raja A1 - Meinel, Christoph T1 - Tele-board : folow the traces of your design process history Y1 - 2012 ER - TY - THES A1 - Grund, Martin T1 - Hyrise : a main memory hybrid database storage engine Y1 - 2012 CY - Potsdam ER - TY - JOUR A1 - Gumienny, Raja A1 - Gericke, Lutz A1 - Wenzel, Matthias A1 - Meinel, Christoph T1 - Tele-board in use : applying aq digital whiteboard system in different situations and setups Y1 - 2012 SN - 978-3-642-31990-7 ER - TY - JOUR A1 - Jobst, Birgit A1 - Köppen, Eva A1 - Lindberg, Tilmann A1 - Moritz, Josephine A1 - Rhinow, Holger A1 - Meinel, Christoph T1 - The faith-factor in design thinking : creative confidence through education at the design thinking schools Potsdam and Standford? Y1 - 2012 SN - 978-3-642-31990-7 ER - TY - JOUR A1 - Kowark, Thomas A1 - Uflacker, Matthias A1 - Zeier, Alexander T1 - Towards a shared platform for virtual collaboration monotoring in design research Y1 - 2012 ER - TY - BOOK A1 - Lerch, Alexander T1 - An introduction to audio content analysis : applications in signal processing and music informatics Y1 - 2012 SN - 978-1-118-26682-3 U6 - https://doi.org/10.1002/9781118393550 PB - Wiley CY - Hoboken, N.J ER - TY - JOUR A1 - Lindberg, Tilmann A1 - Köppen, Eva A1 - Rauth, Ingo A1 - Meinel, Christoph T1 - On the perection, adoption and Implementation of design thinking in the IT industry Y1 - 2012 ER - TY - JOUR A1 - Luebbe, Alexander A1 - Weske, Mathias T1 - Determining the effect of tangible business process modeling Y1 - 2012 ER - TY - JOUR A1 - Meinel, Christoph A1 - Leifer, Larry T1 - Design thinking research Y1 - 2012 SN - 978-3-642-31990-7 ER - TY - JOUR A1 - Meinel, Christoph A1 - Leifer, Larry T1 - Design thinking research Y1 - 2012 ER - TY - BOOK A1 - Meinel, Christoph A1 - Sack, Harald T1 - Internetworking : technische Grundlagen und Anwendungen Y1 - 2012 SN - 978-3-540-92939-0 U6 - https://doi.org/10.1007/978-3-540-92940-6 PB - Springer-Verlag Berlin Heidelberg CY - Berlin, Heidelberg ER -