@inproceedings{22370, author = {{Hölscher, Christian and Zimmer, Detmar and Keßler, Jan Henning and Kruger, Martin and Trächtler, Ansgar}}, booktitle = {{IEEE International Conference on Industrial Informatics}}, isbn = {{978-1-467303-12-5}}, pages = {{1080--1085}}, publisher = {{Industrial Informatics (INDIN)}}, title = {{{Hierarchical optimization of coupled self-optimizing systems}}}, doi = {{10.1109/INDIN.2012.6301199}}, volume = {{10}}, year = {{2012}}, } @inproceedings{22371, author = {{Fiekens, Nicolas and Zimmer, Detmar and Michaelis, Stefanie and Schöppner, Volker and Hallmann, Tobias}}, booktitle = {{DKT 2012. Deutsche Kautschuk Tagung}}, publisher = {{Deutsche Kautschuk-Gesellschaft e.V. (DKG)}}, title = {{{Entwicklung eines modularen Antriebssystems für Kautschukinnenmischer}}}, year = {{2012}}, } @book{22372, author = {{Zimmer, Detmar}}, isbn = {{978-3-446-43000-6}}, pages = {{237--267}}, publisher = {{Carl Hanser Verlag}}, title = {{{Elektromechanische Antriebe}}}, year = {{2012}}, } @techreport{2249, abstract = {{The phenomenon that groups or people work together when they face an opponent, although they have little in common otherwise, has been termed the "common enemy effect". We study a model of network formation, where players can use links to build a network, knowing that they are facing a common enemy who can disrupt the links within the network, and whose goal it is to minimize the sum of the benefits of the network. We find that introducing a common enemy can lead to the formation of stable and efficient networks as well as fragmented networks and the empty network.}}, author = {{Hoyer, Britta and De Jaegher, Kris}}, title = {{{Network Disruption and the Common Enemy Effect}}}, volume = {{12-06}}, year = {{2012}}, } @inproceedings{22737, author = {{Becker, Matthias and Luckey, Markus and Becker, Steffen}}, booktitle = {{{Proceedings of the 8th International ACM SIGSOFT Conference on Quality of Software Architectures (QoSA)}}}, isbn = {{978-1-4503-1346-9}}, keywords = {{model-driven performance engineering, self-*, Self-adaptation, software performance}}, pages = {{117--122}}, publisher = {{ACM}}, title = {{{Model-driven Performance Engineering of Self-adaptive Systems: A Survey}}}, doi = {{10.1145/2304696.2304716}}, year = {{2012}}, } @article{22920, author = {{Gries, Thomas and Prior, Ulrich and Sureth-Sloane, Caren}}, journal = {{Journal of Public Economic Theory}}, number = {{3}}, pages = {{521--545}}, title = {{{A Tax Paradox for Investment Decisions under Uncertainty}}}, doi = {{10.1007/BF03342734}}, volume = {{14}}, year = {{2012}}, } @article{22929, author = {{Yildirim, Ömer and Kiss, Anton A. and Hüser, Nicole and Leßmann, Katharina and Kenig, Eugeny}}, issn = {{1385-8947}}, journal = {{Chemical Engineering Journal}}, pages = {{371--391}}, title = {{{Reactive absorption in chemical process industry: A review on current activities}}}, doi = {{10.1016/j.cej.2012.09.121}}, year = {{2012}}, } @inproceedings{22936, author = {{Low, Cheng and Aldemir, Mustafa and Aziz, Norheliena and Dumitrescu, Roman and Anacker, Harald}}, booktitle = {{Proceedings of the 1st German-Malaysian Workshop, Hannover, 27. - 29. Jun. 2012}}, title = {{{Strategy Planning of Collaborative Humanoid Soccer Robots based on Principle Solution}}}, year = {{2012}}, } @inproceedings{23150, author = {{Bauer, Frank and Gausemeier, Jürgen and Köchling, Daniel and Oestersötebier, Felix}}, booktitle = {{Tag des Systems Engineerings}}, publisher = {{Carl Hanser Verlag, München}}, title = {{{Simulative Absicherung mechatronischer Systeme in der frühen Phase der Produktentstehung}}}, year = {{2012}}, } @inproceedings{23151, author = {{Oestersötebier, Felix and Dziwok, Stefan and Bauer, Frank and Trächtler, Ansgar and Schäfer, Wilhelm and Gausemeier, Jürgen}}, booktitle = {{Tag des Systems Engineerings}}, publisher = {{Carl Hanser Verlag, München}}, title = {{{Unterstützung des mechatronischen Entwurfs durch die effektive Suche nach Lösungselementen mithilfe von semantischen Technologien}}}, year = {{2012}}, } @article{23152, author = {{Kruse, Daniel and Fast, Viktor and Schweers, Christoph and Trächtler, Ansgar}}, journal = {{Virtuelle Instrumente in der Praxis (VIP 2012)}}, title = {{{Einheitliche Testumgebung für MiL und RCP mittels NI VeriStand am Beispiel eines Waschautomaten }}}, year = {{2012}}, } @inproceedings{23153, author = {{Pohlmann, Uwe and Dziwok, Stefan and Suck, Julian and Wolf, Boris and Loh, Chia Choon and Tichy, Matthias}}, booktitle = {{Proceedings of the 9th International Modelica Conference 2012}}, title = {{{A Modelica Library for Real-Time Coordination Modeling}}}, year = {{2012}}, } @article{23154, author = {{Lurye, Oleg and Trächtler, Ansgar}}, journal = {{Advanced Vehicle Control (AVEC)}}, title = {{{Safety Assurance for a Fault Tolerant Control System of an X-By-Wire Vehicle}}}, year = {{2012}}, } @phdthesis{23155, author = {{Koke, Isabel}}, publisher = {{Cuvillier Verlag}}, title = {{{Werkstoffeigenschaften handlaminierter Faserverbundkunststoffe, erfasst in realen und virtuellen Laboren der Mechanik unter Einsatz von Methoden zur Wissensorganisation}}}, year = {{2012}}, } @inproceedings{23156, author = {{Hölscher, Christian and Kessler, Jan Henning and Krüger, Martin and Trächtler, Ansgar and Zimmer, Detmar}}, booktitle = {{10th IEEE International Conference on Industrial Informatics}}, title = {{{Hierarchical Optimization of Coupled Self-optimizing Systems}}}, year = {{2012}}, } @inproceedings{23157, author = {{Esau, Natascha and Krüger, Martin and Rasche, Christoph and Beringer, Steffen and Kleinjohann, Lisa and Kleinjohann, Bernd}}, booktitle = {{7th IEEE Conference in Industrial Electronics and Applications}}, publisher = {{IEEE}}, title = {{{Hierarchical Hybrid Planning for a Self-Optimizing Active Suspension System}}}, year = {{2012}}, } @inproceedings{23158, author = {{Oestersötebier, Felix and Just, Viktor and Trächtler, Ansgar and Bauer, Frank and Dziwok, Stefan}}, booktitle = {{Proceedings of the ASME 2012 11th Biennial Conference on Engineering Systems Design and Analysis}}, pages = {{647--656}}, publisher = {{ASME}}, title = {{{Model-Based Design of Mechatronic Systems by Means of Semantic Web Ontologies and Reusable Solution Elements}}}, year = {{2012}}, } @article{23159, author = {{Lochbichler, Matthias and Schmuedderich, Tanja and Brökelmann, Jan and Trächtler, Ansgar}}, journal = {{World Academy of Science, Engineering and Technology}}, pages = {{327--331}}, title = {{{Methodology For Selecting The Modeling Depth Of Object-Oriented Behavioral Models}}}, year = {{2012}}, } @inproceedings{23160, author = {{Krüger, Martin and Witting, Katrin and Dellnitz, Michael and Trächtler, Ansgar}}, booktitle = {{1st Joint International Symposium on System-Integrated Intelligence}}, title = {{{Robust Pareto Points with Respect to Crosswind of an Active Suspension System}}}, year = {{2012}}, } @inproceedings{23162, author = {{Krüger, Martin and Trächtler, Ansgar}}, booktitle = {{7th Vienna International Conference on Mathematical Modelling}}, title = {{{Approximation of Pareto-Optimal Systems using Parametric Model-Order Reduction}}}, year = {{2012}}, } @proceedings{23163, editor = {{Gausemeier, Sandra}}, title = {{{Fahrerassistenzsystem für energie- und zeitoptimales Fahren durch prädiktive Geschwindigkeitsprofil-Planung}}}, year = {{2012}}, } @inproceedings{23164, author = {{Lurye, Oleg and Kromov, Ivan and Trächtler, Ansgar}}, booktitle = {{Proceedings of Reliability, Avaliability and Maintainability Symposium}}, publisher = {{IEEE}}, title = {{{Automated Design of Reconfiguration Strategies Increases Reliability}}}, year = {{2012}}, } @article{23165, author = {{Gausemeier, Sandra and Trächtler, Ansgar and Jäker, Karl-Peter}}, journal = {{13. Braunschweiger Symposium AAET}}, title = {{{Fahrerassistenzsystem für energie- und zeitoptimales Fahren durch prädiktive Geschwindigkeitsprofil-Planung }}}, year = {{2012}}, } @inproceedings{23166, author = {{Ringkamp, Maik and Walther, Andrea and Reinold, Peter and Witting, Katrin and Dellnitz, Michael and Trächtler, Ansgar}}, booktitle = {{EVOLVE }}, title = {{{Using Algorithmic Differentiation for the Multiobjective Optimization of a Test Vehicle}}}, year = {{2012}}, } @article{23167, author = {{Lurye, Oleg and Trächtler, Ansgar}}, journal = {{13. Braunschweiger Symposium AAET}}, title = {{{Erhöhung der Verlässlichkeit eines innovativen Versuchsfahrzeugs mit Einzelradaktorik durch Rekonfiguration der Regelung }}}, year = {{2012}}, } @article{23168, author = {{Loh, Chia Choon and Trächtler, Ansgar}}, journal = {{Procedia Engineering}}, pages = {{860 -- 866}}, title = {{{Cooperative transportation of a load using nonholonomic mobile robots}}}, volume = {{41}}, year = {{2012}}, } @inproceedings{23169, author = {{Teichrieb, Heinrich and Just, Viktor and Dziwok, Stefan and Pohlmann, Uwe and Schierbaum, Thomas and Trächtler, Ansgar}}, booktitle = {{Berichtsband des Tag des Systems Engineering 2012}}, title = {{{Modellbasierter Entwurf zweier kooperierender Delta-Roboter}}}, year = {{2012}}, } @article{23170, author = {{Al Qaisi, Imad and Trächtler, Ansgar}}, journal = {{Driving Simulation Conference 2012 Europe - DSC 2012,}}, title = {{{Constrained Linear Quadratic Optimal Controller for Motion Control of ATMOS Driving Simulator}}}, year = {{2012}}, } @inproceedings{23171, author = {{Bielawny, Dirk and Bruns, Torsten and Loh, Chia Choon and Trächtler, Ansgar}}, booktitle = {{2012 International Symposium on Robotics and Intelligent Sensors (IRIS)}}, title = {{{Multi-robot Approach for Automation of an Industrial Profile Lamination Process}}}, year = {{2012}}, } @article{23172, author = {{Damerow, Ulf-Hendrik and Borsig, Michael and Homberg, Werner and Trächtler, Ansgar}}, journal = {{Key Engineering Materials Vols. 504-506 (2012)}}, pages = {{907--912}}, title = {{{A self-correcting Approach for the Bending of Metal Parts}}}, year = {{2012}}, } @inproceedings{23173, author = {{Hassan, Bassem and Wassmann, Helene and Klaas, Alexander and Kessler, Jan Henning}}, booktitle = {{Proceedings of the 2012 Emerging M&S Applications in Industry & Academia Symposium, Spring Simulation Multiconference}}, title = {{{Cascaded Heterogeneous Simulations for Analysis of Mechatronic Systems in Large Scale Transportation Scenarios}}}, year = {{2012}}, } @article{23174, author = {{Borsig, Michael and Trächtler, Ansgar and Damerow, Ulf-Hendrik and Homberg, Werner}}, journal = {{14th IFAC Symposium on Information Control Problems in Manufacturing, INCOM 2012,}}, title = {{{Model-based Design of Self-Correcting Strategy for a Punch Bending Machine}}}, year = {{2012}}, } @article{23175, author = {{Al Qaisi, Imad and Trächtler, Ansgar}}, journal = {{IEEE International Conference on Systems, Man and Cybernetics - IEEE SMC 2012}}, title = {{{Human in the Loop: Optimal Control of Driving Simulators and New Motion Quality Criterion}}}, year = {{2012}}, } @inproceedings{21680, abstract = {{The costs of additive manufactured parts often seem too high in comparison to those of traditionally manufactured parts, as the information about major cost drivers, especially for additive manufactured metal parts, is weak. Therefore, a lifecycle analysis of additive manufactured parts is needed to understand and rate the cost drivers that act as the largest contributors to unit costs, and to provide a focus for future cost reduction activities for the Additive Manufacturing (AM) technology. A better understanding of the cost structure will help to compare the AM costs with the opportunity costs of the classical manufacturing technologies and will make it easier to justify the use of AM manufactured parts. This paper will present work in progress and methodology based on a sample investigated with business process analysis / simulation and activity based costing. In addition, cost drivers associated with metal AM process will be rated.}}, author = {{Lindemann, C. and Jahnke, U. and Moi, M. and Koch, R.}}, booktitle = {{23rd Annual International Solid Freeform Fabrication Symposium}}, isbn = {{1053-2153}}, pages = {{177--188}}, title = {{{Analyzing Product Lifecycle Costs for a Better Understanding of Cost Drivers in Additve Manufacturing}}}, doi = {{http://utw10945.utweb.utexas.edu/Manuscripts/2012/2012-12-Lindemann.pdf}}, volume = {{23}}, year = {{2012}}, } @inproceedings{2171, author = {{Gesing, Sandra and Herres-Pawlis, Sonja and Birkenheuer, Georg and Brinkmann, André and Grunzke, Richard and Kacsuk, Peter and Kohlbacher, Oliver and Kozlovszky, Miklos and Krüger, Jens and Müller-Pfefferkorn, Ralph and Schäfer, Patrick and Steinke, Thomas}}, booktitle = {{Proc. EGI Community Forum}}, title = {{{The MoSGrid Community From National to International Scale}}}, year = {{2012}}, } @article{2172, author = {{Thielemans, Kris and Tsoumpas, Charalampos and Mustafovic, Sanida and Beisel, Tobias and Aguiar, Pablo and Dikaios, Nikolaos and W Jacobson, Matthew}}, journal = {{Physics in Medicine and Biology}}, number = {{4}}, pages = {{867--883}}, publisher = {{IOP Publishing}}, title = {{{STIR: Software for Tomographic Image Reconstruction Release 2}}}, doi = {{10.1088/0031-9155/57/4/867}}, volume = {{57}}, year = {{2012}}, } @article{2173, author = {{Redif, Soydan and Kasap, Server}}, journal = {{Int. Journal of Electronics}}, number = {{12}}, pages = {{1646--1651}}, publisher = {{Taylor & Francis}}, title = {{{Parallel algorithm for computation of second-order sequential best rotations}}}, doi = {{10.1080/00207217.2012.751343}}, volume = {{100}}, year = {{2012}}, } @article{2174, author = {{Kasap, Server and Benkrid, Khaled}}, journal = {{Journal of Computers}}, number = {{6}}, pages = {{1312--1328}}, publisher = {{Academy Publishers}}, title = {{{Parallel Processor Design and Implementation for Molecular Dynamics Simulations on a FPGA Parallel Computer}}}, volume = {{7}}, year = {{2012}}, } @article{21755, author = {{Domik, Gitta and Arens, Stephan and Tünnermann, Jan and Scharlau, Ingrid Rose}}, issn = {{0938-3476}}, journal = {{FIfF-Kommunikation}}, keywords = {{Informatik, Visualisierung, Psychologie, Experimentaldesign}}, number = {{3}}, pages = {{45--50}}, publisher = {{Forum InformatikerInnen für Frieden und gesellschaftliche Verantwortung e.V.}}, title = {{{Evaluierung medizinischer Volumenrendering-Algorithmen durch empirische Studien}}}, volume = {{29}}, year = {{2012}}, } @article{21756, author = {{Zhu, Y.}}, journal = {{IEEE Computer Graphics and Applications}}, number = {{6}}, pages = {{6--9}}, publisher = {{IEEE}}, title = {{{Introducing Google Chart Tools and Google Maps API in Data Visualization Courses}}}, doi = {{10.1109/MCG.2012.114}}, volume = {{32}}, year = {{2012}}, } @article{21757, author = {{Koning, W. F.}}, journal = {{IEEE Computer Graphics and Applications}}, number = {{5}}, pages = {{81--83}}, publisher = {{IEEE}}, title = {{{Teaching 3D Computer Animation to Illustrators: The Instructor as Translator and Technical Director}}}, doi = {{10.1109/MCG.2012.106}}, volume = {{32}}, year = {{2012}}, } @article{21758, author = {{Müller, C. and Reina, G. and Burch, M. and Weiskopf, D.}}, journal = {{IEEE Computer Graphics and Applications}}, number = {{4}}, pages = {{14--19}}, publisher = {{IEEE}}, title = {{{Large-Scale Visualization Projects for Teaching Software Engineering}}}, doi = {{10.1109/MCG.2012.81}}, volume = {{32}}, year = {{2012}}, } @inproceedings{21759, author = {{Domik, Gitta and Ebert, David and Kohlhammer, Jörn and Rushmeier, Holly and Santos, Beatriz Sousa and Weiskopf, Daniel}}, booktitle = {{Eurographics 2012 - Education Papers}}, editor = {{Gallo, Giovanni and Sousa Santos, Beatriz}}, issn = {{1017-4656}}, publisher = {{The Eurographics Association}}, title = {{{Visualization Curriculum Panel - or The Changes We Have Made to Our Visualization Courses Over the Last 10 Years}}}, doi = {{10.2312/conf/EG2012/education/001-002}}, year = {{2012}}, } @article{2176, author = {{Herres-Pawlis, Sonja and Birkenheuer, Georg and Brinkmann, André and Gesing, Sandra and Grunzke, Richard and Jäkel, René and Kohlbacher, Oliver and Krüger, Jens and Dos Santos Vieira, Ines}}, journal = {{Studies in Health Technology and Informatics}}, pages = {{142--151}}, publisher = {{IOP Publishing}}, title = {{{Workflow-enhanced conformational analysis of guanidine zinc complexes via a science gateway}}}, doi = {{10.3233/978-1-61499-054-3-142}}, volume = {{175}}, year = {{2012}}, } @article{21760, author = {{Elmqvist, N. and Ebert, D. S.}}, journal = {{IEEE Computer Graphics and Applications}}, number = {{3}}, pages = {{84--87}}, publisher = {{IEEE}}, title = {{{Leveraging Multidisciplinarity in a Visual Analytics Graduate Course}}}, doi = {{10.1109/MCG.2012.55}}, volume = {{32}}, year = {{2012}}, } @article{21761, author = {{Goldman, G.}}, journal = {{IEEE Computer Graphics and Applications}}, number = {{2}}, pages = {{14--21}}, publisher = {{IEEE}}, title = {{{Digital Media and the Beginning Designer}}}, doi = {{10.1109/MCG.2012.35}}, volume = {{32}}, year = {{2012}}, } @article{21762, author = {{Domik, Gitta}}, journal = {{IEEE Computer Graphics and Applications}}, number = {{1}}, pages = {{87--91}}, publisher = {{IEEE}}, title = {{{Fostering Collaboration and Self-Motivated Learning: Best Practices in a One-Semester Visualization Course}}}, doi = {{10.1109/MCG.2012.18}}, volume = {{32}}, year = {{2012}}, } @inproceedings{2178, author = {{Gesing, Sandra and Herres-Pawlis, Sonja and Birkenheuer, Georg and Brinkmann, André and Grunzke, Richard and Kacsuk, Peter and Kohlbacher, Oliver and Kozlovszky, Miklos and Krüger, Jens and Müller-Pfefferkorn, Ralph and Schäfer, Patrick and Steinke, Thomas}}, booktitle = {{Proceedings of Science}}, title = {{{A Science Gateway Getting Ready for Serving the International Molecular Simulation Community}}}, volume = {{PoS(EGICF12-EMITC2)050}}, year = {{2012}}, } @article{21895, author = {{Armbrust, Laura and Rumlich, Dominik}}, journal = {{Zeitschrift für Fremdsprachenforschung}}, number = {{2}}, pages = {{281--284}}, title = {{{Tagungsbericht: Symposium für Promovierende der Fremdsprachen in der Endphase – \textquotedblEndspurt für Dis(s)orientierte\textquotedbl}}}, volume = {{23}}, year = {{2012}}, } @inbook{21911, author = {{Rumlich, Dominik}}, booktitle = {{Language learning and language use}}, editor = {{Kersten, Saskia and Ludwig, Christian and Meer, Dorothee and Rüschoff, Bernd}}, isbn = {{978-3942158282}}, pages = {{115--127}}, publisher = {{Universitätsverlag Rhein-Rhuhr}}, title = {{{The effects of CLIL: Students’ linguistic accuracy in relation to internal and external learner variables}}}, year = {{2012}}, } @inbook{21912, author = {{Rumlich, Dominik}}, booktitle = {{Fremdsprachenunterricht empirisch erforschen. Grundlagen - Methoden - Anwendung}}, editor = {{Doff, Sabine}}, pages = {{169--183}}, publisher = {{Narr}}, title = {{{(Sprach-)Tests in der Praxis: Die Studie „Development Of North Rhine-Westphalian CLIL Students“ (DENOCS).}}}, year = {{2012}}, } @inproceedings{22016, abstract = {{Relating to the direct manufacturing of end-use parts the knowledge about the effect of the long-term ageing of Fused Deposition Modeling (FDM) parts is of particular importance. For this, tensile specimens were stored for time periods of up to 52 weeks in two different conditions and the testing was conducted at different temperatures within a temperature range of -60°C to +160°C. Further tests were made after the exposure in multiple media. The parts were built up with the system “Fortus 400mc” from Stratasys with the material Ultem*9085 in two different build directions, the strongest direction X (on its side) and the weakest build direction Z (upright) and with the standard toolpath parameters of the Insight software version 7.0.}}, author = {{Bagsik, A. and Schöppner, Volker and Klemp, E.}}, booktitle = {{23rd Annual International Solid Freeform Fabrication Symposium}}, pages = {{629--640}}, title = {{{Long-Term ageing effects on Fused Deposition Modeling Parts manufactured with ULTEM*9085}}}, doi = {{http://utw10945.utweb.utexas.edu/Manuscripts/2012/2012-48-Bagsik.pdf}}, volume = {{23}}, year = {{2012}}, } @inproceedings{7739, author = {{Eggert, A and Garnefeld, I and Steinhoff, L}}, booktitle = {{2012 AMA Summer Marketing Educators' Proceedings}}, title = {{{The Bright and Dark Side of Endowed Status in Hierarchical Loyalty Programs}}}, year = {{2012}}, } @inproceedings{7740, author = {{Garnefeld, I and Münkhoff, E and Bruns, A}}, booktitle = {{2012 AMA Summer Marketing Educators’ Proceedings}}, title = {{{I thought it was all over and now it is back again – Customer reactions to time extensions of sales promotions}}}, year = {{2012}}, } @inproceedings{7741, author = {{Eggert, A and Steiner, M and Ulaga, W and Backhaus, K}}, booktitle = {{Proceedings of the 2012 ISBM Academic Workshop}}, title = {{{Capturing the Value of Hybrid Offerings: The Impact of the Price Presentation Format}}}, year = {{2012}}, } @inproceedings{7742, author = {{Ritter, T and Eggert, A}}, booktitle = {{Proceedings of the 2012 ISBM Academic Workshop}}, title = {{{Dispersion of Market Activities: A Configurational Approach}}}, year = {{2012}}, } @inproceedings{7743, author = {{Eggert, A and Münkhoff, E and Thiesbrummel, C}}, booktitle = {{2012 AMA Winter Marketing Educators' Proceedings}}, title = {{{Growing with Industrial Services - A Configurational Approach}}}, year = {{2012}}, } @inproceedings{7744, author = {{Eggert, A and Garnefeld, I and Steinhoff, L}}, booktitle = {{2012 AMA Winter Marketing Educators' Proceedings}}, title = {{{Endowed Status in Hierarchical Loyalty Programs}}}, year = {{2012}}, } @inproceedings{7745, author = {{Garnefeld, I and Helm, S and Eggert, A and Tax, S}}, booktitle = {{2012 AMA Winter Marketing Educators' Proceedings}}, title = {{{Growing Existing Customers’ Profitability with Customer Referral Programs}}}, year = {{2012}}, } @proceedings{7763, editor = {{Ehrig, Hartmut and Engels, Gregor and Kreowski, Hans-Jörg and Rozenberg, Grzegorz}}, publisher = {{Springer}}, title = {{{Graph Transformation - 6th International Conference, ICGT 2012, Bremen, Germany, September 24-29, 2012, Proceedings}}}, volume = {{7562}}, year = {{2012}}, } @article{782, author = {{Biermann, Thorsten and Scalia, Luca and Choi, Changsoon and Karl, Holger and Kellerer, Wolfgang}}, journal = {{Pervasive and Mobile Computing}}, number = {{5}}, pages = {{662----681}}, title = {{{CoMP clustering and backhaul limitations in cooperative cellular mobile access networks}}}, doi = {{10.1016/j.pmcj.2012.03.005}}, year = {{2012}}, } @article{783, author = {{Willig, Andreas and Karl, Holger and Kipnis, Danil}}, journal = {{Wireless Networks}}, number = {{2}}, pages = {{199----213}}, title = {{{Segment-based packet combining: how to schedule a dense relayer cluster?}}}, doi = {{10.1007/s11276-011-0395-y}}, year = {{2012}}, } @inproceedings{784, author = {{Herlich, Matthias and Karl, Holger}}, booktitle = {{Proceedings of the 3rd International Conference on Energy-Efficient Computing and Networking, e-Energy'12, Madrid, Spain, May 9-11, 2012}}, pages = {{14}}, title = {{{Average and competitive analysis of latency and power consumption of a queuing system with a sleep mode}}}, doi = {{10.1145/2208828.2208842}}, year = {{2012}}, } @inproceedings{785, author = {{Blanckenstein, Johannes and Klaue, Jirka and Karl, Holger}}, booktitle = {{European Wireless 2012 - 18th European Conference 2012, April 18-20, 2012, Poznan, Poland.}}, title = {{{Energy Efficient Clustering using a Wake-up Receiver}}}, year = {{2012}}, } @inproceedings{786, author = {{Künsemöller, Jörn and Karl, Holger}}, booktitle = {{Economics of Grids, Clouds, Systems, and Services - 9th International Conference, GECON 2012, Berlin, Germany, November 27-28, 2012. Proceedings}}, pages = {{125----138}}, title = {{{On Local Separation of Processing and Storage in Infrastructure-as-a-Service}}}, doi = {{10.1007/978-3-642-35194-5_10}}, year = {{2012}}, } @inproceedings{787, author = {{Dräxler, Martin and Karl, Holger}}, booktitle = {{2012 IEEE International Conference on Green Computing and Communications, Conference on Internet of Things, and Conference on Cyber, Physical and Social Computing, GreenCom/iThings/CPSCom 2012, Besancon, France, November 20-23, 2012}}, pages = {{581----587}}, title = {{{Efficiency of On-Path and Off-Path Caching Strategies in Information Centric Networks}}}, doi = {{10.1109/GreenCom.2012.82}}, year = {{2012}}, } @inproceedings{788, author = {{Dannewitz, Christian and Herlich, Matthias and Karl, Holger}}, booktitle = {{37th Annual IEEE Conference on Local Computer Networks, Workshop Proceedings, Clearwater Beach, FL, USA, October 22-25, 2012}}, pages = {{1061----1069}}, title = {{{OpenNetInf - prototyping an information-centric Network Architecture}}}, doi = {{10.1109/LCNW.2012.6424044}}, year = {{2012}}, } @inproceedings{789, author = {{Dräxler, Martin and Biermann, Thorsten and Karl, Holger and Kellerer, Wolfgang}}, booktitle = {{23rd IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2012, Sydney, Australia, September 9-12, 2012}}, pages = {{1383----1389}}, title = {{{Cooperating base station set selection and network reconfiguration in limited backhaul networks}}}, doi = {{10.1109/PIMRC.2012.6362563}}, year = {{2012}}, } @inproceedings{790, author = {{Dräxler, Martin and Beister, Frederic and Kruska, Stephan and Aelken, J. and Karl, Holger}}, booktitle = {{International ICST Conference on Simulation Tools and Techniques, SIMUTOOLS '12, Sirmione-Desenzano, Italy, March 19-23, 2012}}, pages = {{157----165}}, title = {{{Using OMNeT++ for energy optimization simulations in mobile core networks}}}, doi = {{10.4108/icst.simutools.2012.247676}}, year = {{2012}}, } @inproceedings{791, author = {{Volkhausen, Tobias and Schinköthe, Kai and Karl, Holger}}, booktitle = {{2012 IEEE Wireless Communications and Networking Conference, WCNC 2012, Paris, France, April 1-4, 2012}}, pages = {{575----580}}, title = {{{Quantization techniques for accurate soft message combining}}}, doi = {{10.1109/WCNC.2012.6214434}}, year = {{2012}}, } @inproceedings{792, author = {{Volkhausen, Tobias and Dridger, Kornelius and S. Lichte, Hermann and Karl, Holger}}, booktitle = {{10th International Symposium on Modeling and Optimization in Mobile, Ad Hoc and Wireless Networks (WiOpt), Paderborn, Germany, May 14-18, 2012}}, pages = {{299----304}}, title = {{{Efficient cooperative relaying in wireless multi-hop networks with commodity WiFi hardware}}}, year = {{2012}}, } @inproceedings{8055, author = {{Becker, Matthias and Luckey, Markus and Becker, Steffen}}, booktitle = {{Proceedings of the International Conference on Quality of Software Architecture}}, publisher = {{ACM}}, title = {{{Model-driven Performance Engineering of Self-Adaptive Systems: A Survey}}}, year = {{2012}}, } @inproceedings{8056, abstract = {{Service-oriented computing (SOC) promises to solve many issues in the area of distributed software development, e.g. the realization of the loose coupling pattern in practice through service discovery and invocation. For this purpose, service descriptions must comprise structural as well as behavioral information of the services otherwise an accurate service discovery is not possible. We addressed this issue in our previous paper and proposed a UML-based rich service description language (RSDL) providing comprehensive notations to specify service requests and offers. However, the automatic matching of service requests and offers specified in a RSDL for the purpose of service discovery is a complex task, due to multifaceted heterogeneity of the service partners. This heterogeneity includes the use of different underlying ontologies or different levels of granularity in the specification itself resulting in complex mappings between service requests and offers. In this paper, we present an automatic matching mechanism for service requests and offers specified in a RSDL that overcomes the underlying heterogeneity of the service partners.}}, author = {{Huma, Zille and Gerth, Christian and Engels, Gregor and Juwig, Oliver}}, booktitle = {{Proceedings of the ACM/IEEE 15th International Conference on Model Driven Engineering Languages and Systems (MODELS'12)}}, pages = {{709--725}}, publisher = {{Springer-Verlag}}, title = {{{Towards an Automatic Service Discovery for UML-based Rich Service Descriptions}}}, doi = {{http://dx.doi.org/10.1007/978-3-642-33666-9_45}}, volume = {{7590}}, year = {{2012}}, } @book{8226, author = {{Kremer, Marion and Engels, Gregor and Hofmann, Alexander and Hohwiller, Jörg and E. Nandico, Oliver and Nötzold, Thomas and Prott, Karl and Schlegel, Diethelm and Seidl, Andreas and Wolf, Thomas}}, publisher = {{Capgemini CSD Research, Offenbach 2012}}, title = {{{Quasar 3.0 - A Situational Approach to Software Engineering}}}, year = {{2012}}, } @inproceedings{568, abstract = {{A major goal of the On-The-Fly Computing project is the automated composition of individual services based on services that are available in dynamic markets. Dependent on the granularity of a market, different alternatives that satisfy the requested functional requirements may emerge. In order to select the best solution, services are usually selected with respect to their quality in terms of inherent non-functional properties. In this paper, we describe our idea of how to model this service selection process as a Markov Decision Process, which we in turn intend to solve by means of Reinforcement Learning techniques in order to control the underlying service composition process. In addition, some initial issues with respect to our approach are addressed.}}, author = {{Jungmann, Alexander and Kleinjohann, Bernd}}, booktitle = {{Proceedings of the 9th IEEE International Conference on Service Computing (SCC)}}, pages = {{701--702}}, title = {{{Towards the Application of Reinforcement Learning Techniques for Quality-Based Service Selection in Automated Service Composition}}}, doi = {{10.1109/SCC.2012.76}}, year = {{2012}}, } @inproceedings{5680, author = {{Püschel, Tim and Schryen, Guido and Hristova, Diana and Neumann, Dirk}}, booktitle = {{European Conference on Information Systems}}, title = {{{Cloud Service Revenue Management}}}, year = {{2012}}, } @inproceedings{5683, author = {{Lang, Fabian and Schryen, Guido and Fink, Andreas}}, booktitle = {{International Conference on Information Systems}}, title = {{{Elicitating, modeling, and processing uncertain human preferences for software agents in electronic negotiations: An empirical study}}}, year = {{2012}}, } @article{5688, author = {{Bodenstein, Christian and Schryen, Guido and Neumann, Dirk}}, journal = {{European Journal of Operational Research : EJOR}}, number = {{1}}, pages = {{157--167}}, publisher = {{Elsevier}}, title = {{{Energy-Aware Workload Management Models for Operating Cost Reduction in Data Centers}}}, volume = {{222}}, year = {{2012}}, } @inproceedings{569, abstract = {{Today's real-time embedded systems operate in frequently changing environments on which they react by self-adaptations. Such an approach needs adequate modeling support of these reconfigurations to enable verification of safety properties, e.g., by timed model checking. Component-based development of such systems realizes these self-adaptations by structural reconfigurations of components and their connectors. However, component models proposed in literature do not support reconfigurable components in real-time embedded context but focus on other domains like business information systems. In this paper, we present an extension of our modeling language MechatronicUML to support structural reconfigurations taking the specific requirements of our domain into account. Based on the proposed extension we outline our research roadmap to achieve verification and realization of systems modeled in MechatronicUML.}}, author = {{Becker, Steffen and Heinzemann, Christian and Priesterjahn, Claudia }}, booktitle = {{Proceedings of the 15th ACM SigSoft International Symposium on Component-Based Software Engineering (CBSE)}}, pages = {{23----28}}, title = {{{Towards Modeling Reconfiguration in Hierarchical Component Architectures}}}, doi = {{10.1145/2304736.2304742}}, year = {{2012}}, } @article{570, abstract = {{This article studies the construction of self-stabilizing topologies for distributed systems. While recent research has focused on chain topologies where nodes need to be linearized with respect to their identiers, we explore a natural and relevant 2-dimensional generalization. In particular, we present a local self-stabilizing algorithm DStab which is based on the concept of \local Delaunay graphs" and which forwards temporary edges in greedy fashion reminiscent of compass routing. DStab constructs a Delaunay graph from any initial connected topology and in a distributed manner in time O(n3) in the worst-case; if the initial network contains the Delaunay graph, the convergence time is only O(n) rounds. DStab also ensures that individual node joins and leaves aect a small part of the network only. Such self-stabilizing Delaunay networks have interesting applications and our construction gives insights into the necessary geometric reasoning that is required for higherdimensional linearization problems.Keywords: Distributed Algorithms, Topology Control, Social Networks}}, author = {{Jacob, Riko and Ritscher, Stephan and Scheideler, Christian and Schmid, Stefan}}, journal = {{Theoretical Computer Science}}, pages = {{137--148}}, publisher = {{Elsevier}}, title = {{{Towards higher-dimensional topological self-stabilization: A distributed algorithm for Delaunay graphs}}}, doi = {{10.1016/j.tcs.2012.07.029}}, year = {{2012}}, } @inproceedings{571, abstract = {{The paradigm shift from purchasing monolithic software solutions to a dynamic composition of individual solutions entails many new possibilities yet great challenges, too. In order to satisfy user requirements, complex services have to be automatically composed of elementary services. Multiple possibilities of composing a complex service inevitably emerge. The problem of selecting the most appropriate services has to be solved by comparing the different service candidates with respect to their quality in terms of inherent non-functional properties while simultaneously taking the user requirements into account. We are aiming for an integrated service rating and ranking methodology in order to support the automation of the underlying decision-making process. The main contribution of this paper is a first decomposition of the quality-based service selection process, while emphasizing major issues and challenges, which we are addressing in the On-The-Fly Computing project.}}, author = {{Jungmann, Alexander and Kleinjohann, Bernd}}, booktitle = {{Proceedings of the 4th International Conferences on Advanced Service Computing (SERVICE COMPUTATION)}}, pages = {{43--47}}, title = {{{Towards an Integrated Service Rating and Ranking Methodology for Quality Based Service Selection in Automatic Service Composition}}}, year = {{2012}}, } @article{5716, abstract = {{The tendency of managers to focus on short-term results rather than on sustained company success is of particular importance to retail marketing managers, because marketing activities involve expenditures which may only pay off in the longer term. To address the issue of myopic management, our study shows how the complexity of the service profit chain (SPC) can cause managers to make suboptimal decisions. Hence, our paper departs from past research by recognizing that understanding the temporal interplay between operational investments, employee satisfaction, customer satisfaction, and operating profit is essential to achieving sustained success. In particular, we intend to improve understanding of the functioning of the SPC with respect to time lags and feedback loops. Results of our large-scale longitudinal study set in a multi-outlet retail chain reveal time-lag effects between operational investments and employee satisfaction, as well as between customer satisfaction and performance. These findings, along with evidence of a negative interaction effect of employee satisfaction on the relationship between current performance and future investments, show the substantial risk of mismanaging the SPC. We identify specific situations in which the dynamic approach leads to superior marketing investment decisions, when compared to the conventional static view of the SCP. These insights provide valuable managerial guidance for effectively managing the SPC over time.}}, author = {{Evanschitzky, Heiner and Wangenheim, Florian v and Wünderlich, Nancy}}, journal = {{Journal of Retailing}}, keywords = {{Employee satisfaction, Customer satisfaction, Performance, Service profit chain, Feedback loops, Time lags, Myopic marketing management}}, number = {{3}}, pages = {{356--366}}, publisher = {{Elsevier}}, title = {{{Perils of Managing the Service Profit Chain: The Role of Time Lags and Feedback Loops.}}}, volume = {{88}}, year = {{2012}}, } @article{5717, abstract = {{Although professional service providers increasingly deliver their services globally, little is known about cross-cultural differences in customers’ motivation to participate in service production. To address this lacuna, we survey a total of 2,284 banking customers in 11 countries on their motivation to provide personal information to, and follow the advice of, their service providers. We find differences in both aspects, but only the differences in providing personal information can be explained by the cultural values of uncertainty avoidance, individualism/collectivism, and masculinity/femininity. To perform certain tasks in the service process, global professional service providers should acknowledge cultural differences in customers’ motivations.}}, author = {{Schumann, Jan H and Wünderlich, Nancy and Zimmer, Marcus S}}, journal = {{Schmalenbach Business Review}}, keywords = {{Co-Production, Culture, Customer Participation, Professional Services}}, number = {{2}}, pages = {{141--165}}, publisher = {{Springer}}, title = {{{Culture’s Impact on Customer Motivation to Engage in Professional Service Enactments.}}}, volume = {{64}}, year = {{2012}}, } @article{5718, abstract = {{The role of information and communication technology for economic growth has been emphasized repeatedly. Technological breakthroughs have generated new forms of services, such as self-services or remote services. Although these encounters are qualitatively different from traditional service provision, prior service management literature thus far had paid little attention to theory development and the systematization of technology-based service encounters. To fill this research gap, the present study outlines how new types of technology-based services fit into existing service typologies and provides an extension of existing frameworks to capture their unique characteristics. These insights in turn offer managerial implications and highlight open research questions.}}, author = {{Schumann, Jan H and Wünderlich, Nancy and Wangenheim, Florian}}, journal = {{Technovation}}, keywords = {{Services, Remote services, Self-services, Technology mediation}}, number = {{2}}, pages = {{133--143}}, publisher = {{Elsevier}}, title = {{{Technology Mediation in Service Delivery: A New Typology and an Agenda for Managers and Academics.}}}, volume = {{32}}, year = {{2012}}, } @inproceedings{572, abstract = {{Service-oriented computing (SOC) promises to solve many issues in the area of distributed software development, e.g. the realization of the loose coupling pattern in practice through service discovery and invocation. For this purpose, service descriptions must comprise structural as well as behavioral information of the services otherwise an accurate service discovery is not possible. We addressed this issue in our previous paper and proposed a UML-based rich service description language (RSDL) providing comprehensive notations to specify service requests and offers.However, the automatic matching of service requests and offers specified in a RSDL for the purpose of service discovery is a complex task, due to multifaceted heterogeneity of the service partners. This heterogeneity includes the use of different underlying ontologies or different levels of granularity in the specification itself resulting in complex mappings between service requests and offers. In this paper, we present an automatic matching mechanism for service requests and offers specified in a RSDL that overcomes the underlying heterogeneity of the service partners.}}, author = {{Huma, Zille and Gerth, Christian and Engels, Gregor and Juwig, Oliver}}, booktitle = {{Proceedings of the ACM/IEEE 15th International Conference on Model Driven Engineering Languages and Systems (MoDELS)}}, pages = {{709----725}}, title = {{{Towards an Automatic Service Discovery for UML-based Rich Service Descriptions}}}, doi = {{10.1007/978-3-642-33666-9_45}}, year = {{2012}}, } @inproceedings{573, abstract = {{In software markets of the future, customer-specific software will be developed on demand from distributed software and hardware services available on world-wide markets. Having a request, services have to be automatically discovered and composed. For that purpose, services have to be matched based on their specifications. For the accurate matching, services have to be described comprehensively that requires the integration of different domain-specific languages (DSLs) used for functional, non-functional, and infrastructural properties. Since different service providers use plenty of language dialects to model the same service property, their integration is needed for the matching. In this paper, we propose a framework for integration of DSLs. It is based on a parameterized abstract core language that integrates key concepts needed to describe a service. Parts of the core language can be substituted with concrete DSLs. Thus, the framework serves as a basis for the comprehensive specification and automatic matching of services.}}, author = {{Arifulina, Svetlana}}, booktitle = {{Proceedings of the Doctoral Symposium of the 5th International Conference on Software Language Engineering 2012, Dresden, Germany (SLE (Doctoral Symposium))}}, editor = {{W. Eisenecker, Ulrich and Bucholdt, Christian}}, pages = {{23----26}}, title = {{{Towards a Framework for the Integration of Modeling Languages}}}, year = {{2012}}, } @article{574, abstract = {{We present Tiara — a self-stabilizing peer-to-peer network maintenance algorithm. Tiara is truly deterministic which allows it to achieve exact performance bounds. Tiara allows logarithmic searches and topology updates. It is based on a novel sparse 0-1 skip list. We then describe its extension to a ringed structure and to a skip-graph.Key words: Peer-to-peer networks, overlay networks, self-stabilization.}}, author = {{Clouser, Thomas and Nesterenko, Mikhail and Scheideler, Christian}}, journal = {{Theoretical Computer Science}}, pages = {{18--35}}, publisher = {{Elsevier}}, title = {{{Tiara: A self-stabilizing deterministic skip list and skip graph}}}, doi = {{10.1016/j.tcs.2011.12.079}}, year = {{2012}}, } @misc{575, author = {{Bremer, Lars}}, publisher = {{Universität Paderborn}}, title = {{{Symbiotic Coupling of Peer-to-Peer and Cloud Systems}}}, year = {{2012}}, } @inproceedings{5753, author = {{Nagel, Benjamin and Gerth, Christian and Yigitbas, Enes and Christ, Fabian and Engels, Gregor}}, booktitle = {{Proceedings of the 1st International Workshop on Model-Driven Engineering for High Performance and CLoud computing co-located with 15th International Conference on Model Driven Engineering Languages and Systems {(MODELS} 2012), Innsbruck, Austria, October 01 - 05, 2012}}, pages = {{4}}, title = {{{Model-driven specification of adaptive cloud-based systems}}}, doi = {{10.1145/2446224.2446228}}, year = {{2012}}, } @misc{576, author = {{Schmitz, Henning}}, publisher = {{Universität Paderborn}}, title = {{{Stereo Matching on a Convey HC-1 Hybrid Core Computer}}}, year = {{2012}}, } @misc{5760, author = {{Yigitbas, Enes}}, title = {{{Entwicklung eines Monitoring- und Adaptionskonzeptes für Geschäftsprozesse in service-orientierten Systemen}}}, year = {{2012}}, } @proceedings{577, abstract = {{SSS is an international forum for researchers and practitioners in the design and development of distributed systems with self-properties: (classical) self-stabilizing, self-configuring, self-organizing, self-managing, self-repairing, self-healing, self-optimizing, self-adaptive, and self-protecting. Research in distributed systems is now at a crucialpoint in its evolution, marked by the importance of dynamic systems such as peer-to-peer networks, large-scale wireless sensor networks, mobile ad hoc networks, cloud computing, robotic networks, etc. Moreover, new applications such as grid and web services, banking and e-commerce, e-health and robotics, aerospace and avionics, automotive, industrial process control, etc. have joined the traditional applications of distributed systems. The theory of self-stabilization has been enriched in the last 30 years by high quality research contributions in the areas of algorithmic techniques, formal methodologies, model theoretic issues, and composition techniques. All these areas are essential to the understanding and maintenance of self-properties in fault-tolerant distributed systems.}}, editor = {{Richa, Andrea W. and Scheideler, Christian}}, location = {{Paderborn, Germany}}, title = {{{Stabilization, Safety, and Security of Distributed Systems}}}, doi = {{10.1007/978-3-642-33536-5}}, year = {{2012}}, } @techreport{578, abstract = {{This paper analyzes the stability of capital tax harmonization agreements in a stylized model where countries have formed coalitions which set a common tax rate in order to avoid the inefficient fully non-cooperative Nash equilibrium. In particular, for a given coalition structure we study to what extend the stability of tax agreements is affected by the coalitions that have formed. In our set-up, countries are symmetric, but coalitions can be of arbitrary size. We analyze stability by means of a repeated game setting employing simple trigger strategies and we allow a sub-coalition to deviate from the coalitional equilibrium. For a given form of punishment we are able to rank the stability of different coalition structures as long as the size of the largest coalition does not change. Our main results are: (1) singleton regions have the largest incentives to deviate, (2) the stability of cooperation depends on the degree of cooperative behavior ex-ante.}}, author = {{Brangewitz, Sonja and Brockhoff, Sarah}}, publisher = {{Universität Paderborn}}, title = {{{Stability of Coalitional Equilibria within Repeated Tax Competition}}}, year = {{2012}}, } @article{579, abstract = {{A left-to-right maximum in a sequence of n numbers s_1, …, s_n is a number that is strictly larger than all preceding numbers. In this article we present a smoothed analysis of the number of left-to-right maxima in the presence of additive random noise. We show that for every sequence of n numbers s_i ∈ [0,1] that are perturbed by uniform noise from the interval [-ε,ε], the expected number of left-to-right maxima is Θ(&sqrt;n/ε + log n) for ε>1/n. For Gaussian noise with standard deviation σ we obtain a bound of O((log3/2 n)/σ + log n).We apply our results to the analysis of the smoothed height of binary search trees and the smoothed number of comparisons in the quicksort algorithm and prove bounds of Θ(&sqrt;n/ε + log n) and Θ(n/ε+1&sqrt;n/ε + n log n), respectively, for uniform random noise from the interval [-ε,ε]. Our results can also be applied to bound the smoothed number of points on a convex hull of points in the two-dimensional plane and to smoothed motion complexity, a concept we describe in this article. We bound how often one needs to update a data structure storing the smallest axis-aligned box enclosing a set of points moving in d-dimensional space.}}, author = {{Damerow, Valentina and Manthey, Bodo and Meyer auf der Heide, Friedhelm and Räcke, Harald and Scheideler, Christian and Sohler, Christian and Tantau, Till}}, journal = {{Transactions on Algorithms}}, number = {{3}}, pages = {{30}}, publisher = {{ACM}}, title = {{{Smoothed analysis of left-to-right maxima with applications}}}, doi = {{10.1145/2229163.2229174}}, year = {{2012}}, } @inproceedings{580, abstract = {{We present and study a new model for energy-aware and profit-oriented scheduling on a single processor.The processor features dynamic speed scaling as well as suspension to a sleep mode.Jobs arrive over time, are preemptable, and have different sizes, values, and deadlines.On the arrival of a new job, the scheduler may either accept or reject the job.Accepted jobs need a certain energy investment to be finished in time, while rejected jobs cause costs equal to their values.Here, power consumption at speed $s$ is given by $P(s)=s^{\alpha}+\beta$ and the energy investment is power integrated over time.Additionally, the scheduler may decide to suspend the processor to a sleep mode in which no energy is consumed, though awaking entails fixed transition costs $\gamma$.The objective is to minimize the total value of rejected jobs plus the total energy.Our model combines aspects from advanced energy conservation techniques (namely speed scaling and sleep states) and profit-oriented scheduling models.We show that \emph{rejection-oblivious} schedulers (whose rejection decisions are not based on former decisions) have – in contrast to the model without sleep states – an unbounded competitive ratio.It turns out that the jobs' value densities (the ratio between a job's value and its work) are crucial for the performance of such schedulers.We give an algorithm whose competitiveness nearly matches the lower bound w.r.t\text{.} the maximum value density.If the maximum value density is not too large, the competitiveness becomes $\alpha^{\alpha}+2e\alpha$.Also, we show that it suffices to restrict the value density of low-value jobs only.Using a technique from \cite{Chan:2010} we transfer our results to processors with a fixed maximum speed.}}, author = {{Cord-Landwehr, Andreas and Kling, Peter and Mallmann Trenn, Fredrik}}, booktitle = {{Proceedings of the 1st Mediterranean Conference on Algorithms (MedAlg)}}, editor = {{Even, Guy and Rawitz, Dror}}, pages = {{218--231}}, title = {{{Slow Down & Sleep for Profit in Online Deadline Scheduling}}}, doi = {{10.1007/978-3-642-34862-4_17}}, year = {{2012}}, } @inproceedings{581, abstract = {{Nanoparticles are getting more and more in the focus of the scientic community since the potential for the development of very small particles interacting with each other and completing medical and other tasks is getting bigger year by year. In this work we introduce a distributed local algorithm for arranging a set of nanoparticles on the discrete plane into specic geometric shapes, for instance a rectangle. The concept of a particle we use can be seen as a simple mobile robot with the following restrictions: it can only view the state of robots it is physically connected to, is anonymous, has only a constant size memory, can only move by using other particles as an anchor point on which it pulls itself alongside, and it operates in Look-Compute-Move cycles. The main result of this work is the presentation of a random distributed local algorithm which transforms any given connected set of particles into a particular geometric shape. As an example we provide a version of this algorithm for forming a rectangle with an arbitrary predened aspect ratio. To the best of our knowledge this is the rst work that considers arrangement problems for these types of robots.}}, author = {{Drees, Maximilian and Hüllmann (married name: Eikel), Martina and Koutsopoulos, Andreas and Scheideler, Christian}}, booktitle = {{Proceedings of the 26th IEEE International Parallel and Distributed Processing Symposium (IPDPS)}}, pages = {{1272--1283}}, title = {{{Self-Organizing Particle Systems}}}, doi = {{10.1109/IPDPS.2012.116}}, year = {{2012}}, } @misc{582, author = {{Strothmann, Thim Frederik}}, publisher = {{Universität Paderborn}}, title = {{{Self-Optimizing Binary Search Trees - A Game Theoretic Approach}}}, year = {{2012}}, } @misc{583, author = {{Drücker, Julian}}, publisher = {{Universität Paderborn}}, title = {{{Revenue-maximizing Order of Sale in Sequential Auctions}}}, year = {{2012}}, } @misc{584, author = {{Hohenberger, Till}}, publisher = {{Universität Paderborn}}, title = {{{Queuing Latency at Cooperative Base Stations}}}, year = {{2012}}, } @inproceedings{585, abstract = {{In a cloud-computing scenario where users buy software from software providers and execute it at computing centers, a digital rights management (DRM) system has to be in place to check the software licenses during each software execution. However, the exposure of users to privacy invasion in the presence of DRM systems is problematic.We come up with a concept that unites software providers' and users' demands for a secure and privacy-preserving DRM system for cloud computing. The employment of proxy re-encryption allows for a prevention of profile building (under pseudonym) of users by any party.}}, author = {{Petrlic, Ronald}}, booktitle = {{Proceedings of 4th International Symposium on Cyberspace Safety and Security (CSS)}}, pages = {{194--211}}, title = {{{Proxy Re-Encryption in a Privacy-Preserving Cloud Computing DRM Scheme}}}, doi = {{10.1007/978-3-642-35362-8_16}}, year = {{2012}}, }