@article{7277, author = {{Gerth, Christian and Küster, Jochen and Luckey, Markus and Engels, Gregor}}, journal = {{Software and Systems Modeling}}, number = {{3}}, pages = {{517--535}}, title = {{{Detection and Resolution of Conflicting Change Operations in Version Management of Process Models}}}, volume = {{12}}, year = {{2013}}, } @article{7278, abstract = {{Modellbasiertes Testen verspricht potenziell eine höhere Effizienz und Effektivität im Testprozess. Ob im eigenen Kontext der Einsatz wirtschaftlich ist, ist jedoch häufig unklar. Dieser Beitrag analysiert systematisch Kosten- und Nutzenfaktoren und stellt ein Verfahren zur Abschätzung der Wirtschaftlichkeit des modellbasierten Testens vor. Anhand eines Beispiels wird der Ablauf veranschaulicht.}}, author = {{Faragó, David and Törsel, Arne-Michael and Mlynarski, Michael and Weißleder, Stephan and Güldali, Baris and Brandes, Christian}}, journal = {{OBJEKTspektrum}}, pages = {{32--38}}, title = {{{Wirtschaftlichkeitsberechnung für MBT: Wann sich modellbasiertes Testen lohnt}}}, volume = {{4}}, year = {{2013}}, } @inbook{7523, author = {{Engels, Gregor and Sauer, Stefan}}, booktitle = {{Handbook of Software Engineering and Knowledge Engineering}}, editor = {{Chang, S K}}, isbn = {{9789810245146}}, pages = {{21----53}}, publisher = {{World Scientific Publishing Company}}, title = {{{Object-oriented Modeling of Multimedia Applications}}}, doi = {{https://doi.org/10.1142/4603}}, volume = {{2}}, year = {{2013}}, } @phdthesis{7569, abstract = {{Dynamic Meta Modeling (DMM) is a semantics specification technique targeted at MOF-based modeling languages, where a language's behavior is defined by means of graphical operational rules which change runtime models. The DMM approach has first been suggested by Engels et al. in 2000; Hausmann has then defined the DMM language on a conceptual level within his PhD thesis in 2006. Consequently, the next step was to bring the existing DMM concepts alive, and then to apply them to different modeling languages, making use of the lessons learned to improve the DMM concepts as well as the DMM tooling. The result of this process is the DMM++ method, which is presented within this thesis. Our contributions are three-fold: First, and according to our experiences with the DMM language, we have introduced new concepts such as refinement by means of rule overriding, and we have strengthened existing concepts such as the dealing with universally quantified structures or attributes. Second, we have developed a test-driven process for semantics specification: A set of test models is created, and their expected behavior is fixed. Then, the DMM rules are created incrementally, finally resulting in a DMM ruleset realizing at least the expected behavior of the test models. Additionally, we have defined a set of coverage criteria for DMM rulesets which allow to measure the quality of a set of test models. Third, we have shown how functional as well as non-functional requirements can be formulated against models and their DMM specifications. The former is achieved by providing a visual language for formulating temporal logic properties, which are then verified with model checking techniques, and by allowing for visual debugging of models failing a requirement. For the latter, the modeler can add performance information to models and analyze their performance properties, e.g. average throughput.}}, author = {{Soltenborn, Christian}}, publisher = {{Universität Paderborn}}, title = {{{Quality Assurance with Dynamic Meta Modeling}}}, doi = {{http://nbn-resolving.de/urn:nbn:de:hbz:466:2-12420}}, year = {{2013}}, } @phdthesis{7571, abstract = {{Driven by the need for a closer alignment of business and IT requirements, the role of business process models in the development of enterprise software systems has increased continuously. Similar to other software artifacts, process models are developed and refined in team environments by several stakeholders, resulting in different versions. These versions need to be merged in order to obtain an integrated process model. Existing solutions to this basic problem in the field of software configuration management are mainly limited to textual documents, e.g., source code. This monograph presents a generally applicable framework for process model change management, which provides easy-to-use comparison and merging capabilities for the integration of different process model versions. The framework supports popular modeling languages such as BPMN, BPEL, or UML Activity Diagrams. Differences between process models are represented in terms of intuitive, high-level change operations. Equipped with a sophisticated analysis of dependencies and a semantic-aware computation of conflicts between differences, the framework constitutes a comprehensive and practically usable solution for process model change management in the model-driven development of enterprise software systems.}}, author = {{Gerth, Christian}}, title = {{{Business Process Models - Change Management}}}, year = {{2013}}, } @article{769, author = {{Biermann, Thorsten and Scalia, Luca and Choi, Changsoon and Kellerer, Wolfgang and Karl, Holger}}, journal = {{{IEEE} Communications Magazine}}, number = {{8}}, title = {{{How backhaul networks influence the feasibility of coordinated multipoint in cellular networks}}}, doi = {{10.1109/MCOM.2013.6576356}}, year = {{2013}}, } @inproceedings{8485, author = {{Spijkerman, Michael }}, booktitle = {{Software Engineering 2013 - Workshopband (inkl. Doktorandensymposium) SE 2013 (to appear)}}, pages = {{425----434}}, publisher = {{GI}}, title = {{{Ein pragmatischer Ansatz zur Entwicklung situationsgerechter Entwicklungsmethoden}}}, volume = {{215}}, year = {{2013}}, } @inproceedings{8486, author = {{Nagel , Benjamin and Gerth , Christian and Post, Jennifer and Engels, Gregor}}, booktitle = {{Proceedings of the CAiSE'13 Forum at the 25th International Conference on Advanced Information Systems Engineering (CAiSE'13)}}, pages = {{9----16}}, publisher = {{CEUR-WS.org}}, title = {{{Kaos4SOA - Extending KAOS Models with Temporal and Logical Dependencies}}}, volume = {{998}}, year = {{2013}}, } @inproceedings{8487, author = {{Kehrer , Timo and Gerth, Christian }}, booktitle = {{Proceedings of the Workshop on Comparison and Versioning of Software Models (CVSM'13)}}, number = {{2}}, pages = {{32--34}}, publisher = {{FG Softwaretechnik, Gesellschaft für Informatik e.v. (GI)}}, title = {{{CVSM 2013 Challenge: Recognizing High-level Edit Operations in Evolving Models.}}}, volume = {{33}}, year = {{2013}}, } @inproceedings{8488, author = {{Grieger , Marvin and Sauer, Stefan}}, booktitle = {{Software Engineering 2013 Workshopband}}, pages = {{189--200}}, publisher = {{GI, Köllen Druck+Verlag GmbH, Bonn}}, title = {{{Wiederverwendbarkeit von Migrationswissen durch Techniken der modellgetriebenen Softwareentwicklung}}}, year = {{2013}}, } @inproceedings{8489, author = {{Nagel , Benjamin and Gerth , Christian and Engels, Gregor}}, booktitle = {{Proceedings of the 9th Workshop on Engineering Service-Oriented Applications (WESOA 2013) (accepted for application)}}, title = {{{Goal-driven Composition of Business Process Models}}}, year = {{2013}}, } @inproceedings{8490, author = {{Fazal-Baqaie , Masud and Luckey , Markus and Engels, Gregor}}, booktitle = {{Software Engineering 2013 Workshopband}}, pages = {{435--444}}, publisher = {{GI, Köllen Druck+Verlag GmbH, Bonn}}, title = {{{Assembly-based Method Engineering with Method Patterns}}}, year = {{2013}}, } @inbook{8547, author = {{Göller, Robin and Kortemeyer, Jörg and Liebendörfer, Michael and Biehler, Rolf and Hochmuth, Reinhard and Krämer, Jana and Ostsieker, Laura and Schreiber, Stephan}}, booktitle = {{Beiträge zum Mathematikunterricht 2013: Vorträge auf der 47. Tagung für Didaktik der Mathematik}}, editor = {{Greefrath, Gilbert}}, pages = {{360--363}}, publisher = {{WTM-Verlag}}, title = {{{Instrumentenentwicklung zur Messung von Lernstrategien in mathematikhaltigen Studiengängen}}}, year = {{2013}}, } @inproceedings{8549, author = {{Kolter, Jana and Liebendörfer, Michael}}, booktitle = {{Mathematik im Übergang Schule / Hochschule und im ersten Studienjahr}}, pages = {{101--102}}, title = {{{Mathe – nein danke? Interesse im und am Mathematikstudium bei Grundschullehramtsstudierenden mit Pflichtfach}}}, year = {{2013}}, } @inbook{8551, author = {{Liebendörfer, Michael and Hochmuth, Reinhard}}, booktitle = {{Proceedings of the 37th Conference of the International Group for the Psychology of Mathematics Education}}, editor = {{Lindmeier, Anke and Heinze, Aiso}}, pages = {{240}}, title = {{{Interest and Self-Determination in the Transition to Studying Mathematics}}}, volume = {{5}}, year = {{2013}}, } @inproceedings{8553, author = {{Liebendörfer, Michael and Hochmuth, Reinhard}}, booktitle = {{Proceedings of the 8th {Conference} of European Research in Mathematics Education}}, editor = {{Ubuz, Behiye and Haser, Çiğdem} and Mariotti, Maria Alessandra}}, isbn = {{978-975-429-315-9}}, pages = {{2386--2395}}, publisher = {{Middle East Technical University}}, title = {{{Interest in Mathematics and the First Steps at the University}}}, year = {{2013}}, } @article{4098, abstract = {{The selective deposition and self-assembly of nanospheres from a colloidal suspension in trenches on silicon surfaces is investigated using conventional light, confocal laser scanning and scanning electron microscopy. Trenches with widths of one to several nanosphere diameters are formed on silicon surfaces by photolithography and reactive ion etching. The spreading knife convective self-assembly technique is employed to distribute the nanosphere suspension on the pre-patterned surface. It is shown that this technique is particularly useful in combination with a functionalized surface where a selfassembled molecular monolayer changes the contact angle such that sphere deposition takes place almost exclusively in the trenches. By this, lines selectively filled with a chain of beads with a length of 0.5 mm have been achieved.}}, author = {{Brassat, Katharina and Assion, Fabian and Hilleringmann, Ulrich and Lindner, Jörg}}, issn = {{1862-6300}}, journal = {{physica status solidi (a)}}, location = {{Warsaw (Poland)}}, number = {{8}}, pages = {{1485--1489}}, publisher = {{Wiley}}, title = {{{Self-organization of nanospheres in trenches on silicon surfaces}}}, doi = {{10.1002/pssa.201200899}}, volume = {{210}}, year = {{2013}}, } @phdthesis{501, abstract = {{Handling run-time dynamics on embedded system-on-chip architectures has become more challenging over the years. On the one hand, the impact of workload and physical dynamics on the system behavior has dramatically increased. On the other hand, embedded architectures have become more complex as they have evolved from single-processor systems over multi-processor systems to hybrid multi-core platforms.Static design-time techniques no longer provide suitable solutions to deal with the run-time dynamics of today's embedded systems. Therefore, system designers have to apply run-time solutions, which have hardly been investigated for hybrid multi-core platforms.In this thesis, we present fundamental work in the new area of run-time management on hybrid multi-core platforms. We propose a novel architecture, a self-adaptive hybrid multi-core system, that combines heterogeneous processors, reconfigurable hardware cores, and monitoring cores on a single chip. Using self-adaptation on thread-level, our hybrid multi-core systems can effectively perform performance and thermal management autonomously at run-time. }}, author = {{Happe, Markus}}, isbn = {{978-3-8325-3425-7}}, pages = {{220}}, publisher = {{Logos Verlag Berlin GmbH}}, title = {{{Performance and thermal management on self-adaptive hybrid multi-cores}}}, year = {{2013}}, } @inproceedings{506, abstract = {{Alle Dom{\"a}nen und Branchen der heutigen Wirtschaft sind auf eine effiziente und effektive Entwicklung von ben{\"o}tigten Softwaresystemen angewiesen. Das 40 Jahre alte Prinzip der Beschaffung von Softwaresystemen durch den Einkauf von teuren, relativ unflexiblen Standardl{\"o}sungen beziehungsweise der noch teureren Erstellung durch Softwareh{\"a}user oder eigene Softwareabteilungen muss deshalb in Frage gestellt werden. Mit dem Einsatz von Cloud Computing-Techniken wird es m{\"o}glich, Softwaresysteme und die f{\"u}r den Betrieb ben{\"o}tigten Ressourcen nur bei Bedarf und nur in der ben{\"o}tigten Form einzukaufen. Mit dem Ansatz der service-orientierten Architekturen stehen Methoden zur Verf{\"u}gung, Software zumindest unternehmensintern flexibel zusammenzustellen. Diese ersten Ans{\"a}tze f{\"u}r eine neue Art der Entwicklung und des Betriebs von Softwaresystemen bilden den Ausgangspunkt f{\"u}r die Forschungen in dem seit 2011 laufenden DFG Sonderforschungsbereich (SFB) 901 „On-The-Fly Computing“ an der Universit{\"a}t Paderborn. Die Vision des On-The-Fly Computing ist, dass die Softwaresysteme der Zukunft aus individuell und automatisch konfigurierten und zur Ausf{\"u}hrung gebrachten Softwarebausteinen bestehen, die auf M{\"a}rkten frei gehandelt werden und flexibel kombinierbar sind. Um zu erforschen, in wie weit diese Vision realisierbar ist, werden Konzepte, Methoden und Techniken entwickelt, die eine weitestgehend automatische Konfiguration, Ausf{\"u}hrung und Adaption von Softwaresystemen aus auf weltweiten M{\"a}rkten verf{\"u}gbaren Services erm{\"o}glichen. Um diese Ziele zu erreichen, arbeiten an der Universit{\"a}t Paderborn Informatiker aus unterschiedlichen Disziplinen wie Softwaretechnik, Algorithmik, Rechnernetze, Systementwurf, Sicherheit und Kryptographie mit Wirtschaftswissenschaftlern zusammen, die ihre spezifische Expertise einbringen, mit der die Organisation und Weiterentwicklung des Marktes vorangetrieben werden kann.}}, author = {{Engels, Gregor}}, booktitle = {{Proceedings of the Multikonferenz Sofware Engineering 2013 (SE 2013)}}, pages = {{17--18}}, title = {{{On-The-Fly Computing -- Das Entwicklungs- und Betriebsparadigma fürSoftwaresysteme der Zukunft}}}, year = {{2013}}, } @inproceedings{507, abstract = {{We study two-party communication in the context of directed dynamic networks that are controlled by an adaptive adversary. This adversary is able to change all edges as long as the networks stay strongly-connected in each round. In this work, we establish a relation between counting the total number of nodes in the network and the problem of exchanging tokens between two communication partners which communicate through a dynamic network. We show that the communication problem for a constant fraction of n tokens in a dynamic network with n nodes is at most as hard as counting the number of nodes in a dynamic network with at most 4n+3 nodes. For the proof, we construct a family of directed dynamic networks and apply a lower bound from two-party communication complexity.}}, author = {{Abshoff, Sebastian and Benter, Markus and Malatyali, Manuel and Meyer auf der Heide, Friedhelm}}, booktitle = {{Proceedings of the 17th International Conference on Principles of Distributed Systems (OPODIS)}}, pages = {{11--22}}, title = {{{On Two-Party Communication Through Dynamic Networks}}}, doi = {{10.1007/978-3-319-03850-6_2}}, year = {{2013}}, }