@inproceedings{SchroepferSchwaegerlWestfechtel, author = {Schr{\"o}pfer, Johannes and Schw{\"a}gerl, Felix and Westfechtel, Bernhard}, title = {Consistency control for model versions in evolving model-driven software product lines}, series = {2019 ACM/IEEE 22nd International Conference on Model Driven Engineering Languages and Systems Companion (MODELS-C), Munich, Germany}, booktitle = {2019 ACM/IEEE 22nd International Conference on Model Driven Engineering Languages and Systems Companion (MODELS-C), Munich, Germany}, publisher = {IEEE}, doi = {10.1109/MODELS-C.2019.00043}, pages = {268 -- 277}, abstract = {Model-driven software product lines evolve in both time and space. Consistency control for model versions constitutes a key challenge. We propose a novel approach to consistency control called well-formedness analysis and repair: Instead of attempting to guarantee consistency of each configurable version a priori (which is hard and restrictive), consistency is controlled only when a product version is actually configured. Conflicts, i.e., violation of well-formedness constraints, are detected and repaired, driven by configurable strategies. This approach is generic; it is instantiated for feature models (for the variability model) and EMF models (as domain artifacts).}, language = {en} } @phdthesis{Thumann, author = {Thumann, Maria}, title = {Anpassung der Verarbeitungseigenschaften von Frischbetonmischungen f{\"u}r die Entwicklung von Spritzbetonen mit reduziertem Versinterungspotential}, address = {Regensburg}, pages = {XIV, 179}, abstract = {In nicht druckwasserhaltenden Tunnelbauwerken wird das Bergwasser {\"u}ber Entw{\"a}sserungs� systeme gesammelt und aus dem Bauwerk geleitet. Versinterungen der Drainageleitungen des sekund{\"a}ren Entw{\"a}sserungssystems f{\"u}hren zu Querschnittsverminderungen und -verschl{\"u}ssen, wodurch die gezielte Ableitung des Bergwassers aus dem Bauwerk gest{\"o}rt wird. Zur Vermeidung von Sch{\"a}den am Tunnelbauwerk oder von Wassereintritten in den Tunnel, aufgrund eines Anstiegs des Bergwasserdrucks hinter der Innenschale, sind regelm{\"a}ßige Reinigungsarbeiten erforderlich. Die Reinigung der Drainageleitungen ist h{\"a}ufig sehr kosten� intensiv und f{\"u}hrt zu Verkehrsbehinderungen in den Tunneln. Die Entstehung von Versinterungen wird durch die chemisch-physikalische Zusammensetzung des Bergwassers, die Umgebungsbedingungen im Bereich des Tunnels, die Ausf{\"u}hrung des Entw{\"a}sserungssystems und den Kontakt des Bergwassers mit zementgebundenen Materialien, z. B. dem Spritzbeton, beeinflusst. Ein Ansatz, um die Entstehung von Versinterungen zu reduzieren, ist die Optimierung der Spritzbetonrezeptur. Die {\"A}nderung der Rezeptur� zusammensetzung beeinflusst aber auch die Verarbeitbarkeit der Frischbetonmischung, die Fr{\"u}hfestigkeitsentwicklung des jungen Spritzbetons und die Festigkeitsentwicklung des Spritzbetons. Die Versuchsergebnisse von Auslaugversuchen mit M{\"o}rtel-, Spritzm{\"o}rtel- und Spritzbeton� proben im Rahmen dieser Arbeit belegen, dass das Versinterungspotential durch eine Reduzierung des Klinkergehalts im Bindemittel, den Einsatz von puzzolanischen oder latent� hydraulischen Zusatzstoffen und eine geringe Porosit{\"a}t reduziert wird. Die {\"A}nderungen der Bindemittelzusammensetzung des Spritzbetons haben Auswirkungen auf den Klinkergehalt, den Wasserbedarf und den Leimgehalt und damit auch auf die Verarbeitbarkeit der Frischbetonmischung. F{\"u}r die Beurteilung der Verarbeitbarkeit, v. a. der Pumpbarkeit, von Frischbetonen und Frischbetonmischungen wurden Konsistenzpr{\"u}fverfahren, rheologische Pr{\"u}fverfahren und Pr{\"u}fverfahren zur Beurteilung der Stabilit{\"a}t ausgew{\"a}hlt. Ihre Eignung und Aussagekraft wurde bei Pumpversuchen mit einer mobilen Spritzbetonmaschine verifiziert. F{\"u}r die Pumpbarkeit von Frischbetonmischungen ist zum einen ein ausreichendes Leimvolumen zur Ausbildung einer Gleitschicht an der Rohrwandung erforderlich und zum anderen m{\"u}ssen die Mischungen unter Druck ausreichend stabil bleiben, damit w{\"a}hrend des Pumpens keine Blockaden in den F{\"o}rderleitungen auftreten. Sofern diese Aspekte bei den entwickelten Rezepturen erf{\"u}llt sind, ist eine ausreichende Verarbeitbarkeit der Frischbetonmischungen erreicht. Dar{\"u}ber hinaus konnten die Anforderungen an die Fr{\"u}hfestigkeitsentwicklung und die 28 d Druckfestigkeit der Spritzbetone mit optimierten Mischungen erf{\"u}llt werden. Im Rahmen dieser Arbeit wurde gezeigt, welche Aspekte bei der Entwicklung von Spritzbetonen mit einem reduzierten Versinterungspotential ber{\"u}cksichtigt werden m{\"u}ssen, um auch die genannten baupraktischen Anforderungen zu erf{\"u}llen.}, language = {de} } @article{Pierobon, author = {Pierobon, Chiara}, title = {EU's support to civil society in Kazakhstan: A pilot evaluation of the social capital generated}, series = {Evaluation}, volume = {25}, journal = {Evaluation}, number = {2}, publisher = {Sage}, doi = {10.1177/1356389018796023}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:898-opus4-87394}, pages = {207 -- 223}, abstract = {In the last decade, several studies have been devoted to the analysis of the EU's support to civil society abroad, but only recently has scholarly attention turned to Central Asia. Most of the research in this field has adopted a macro-level perspective, concerned with the supply side of external democratization, and has examined external assistance to civil society in terms of democratization ideal types and typologies. The main contribution of this study consists of a meso-level analysis of the outcomes of the EU's support to civil society in terms of production of social capital, conceived as the raw material of civil society itself. More precisely, the article evaluates the first wave of grants awarded to civil society organizations in Kazakhstan as part of two EU funding schemes—the European Instrument for Democracy and Human Rights and the Non-State Actors and Local Authorities in Development. The article sheds new light on the use of social capital and its two dimensions-structural and cognitive-as heuristic tools for evaluating civil society support programs.}, language = {en} } @article{ReschkeAuburgerMarichalaretal., author = {Reschke, Johannes and Auburger, Marie-Theres and Marichalar, Rebeca and Neumann, Cornelius}, title = {Communication between automated vehicles and pedestrians}, series = {ATZ worldwide}, volume = {121}, journal = {ATZ worldwide}, number = {9}, publisher = {Springer Nature}, address = {Wiesbaden}, doi = {10.1007/s38311-019-0098-z}, pages = {16 -- 23}, language = {en} } @book{LukeschKellner, author = {Lukesch, Maximilian and Kellner, Florian}, title = {{\"U}bungsbuch Produktionswirtschaft}, publisher = {Springer Gabler}, address = {Berlin}, isbn = {9783662576892}, doi = {10.1007/978-3-662-57689-2}, pages = {XVI, 217}, abstract = {Dieses Buch bietet mehr als 60 {\"U}bungsaufgaben und Fallstudien inklusive ausf{\"u}hrlicher L{\"o}sungen zu ausgew{\"a}hlten Themen der Produktionswirtschaft. Jedes Kapitel enth{\"a}lt eine kurze Einleitung sowie zu erreichende Lernziele. Querverweise auf das Lehrbuch „Produktionswirtschaft" von Kellner/Lienland/Lukesch erleichtern das Selbststudium und eine optimale Pr{\"u}fungsvorbereitung. Der Inhalt Produktionsfaktoren: Mensch, Betriebsmittel, Material, Information Produktionsplanung: Lineare Programmierung, Bedarfsrechnung, Materialbedarfsplanung Produktionssteuerung: Reihenfolgeplanung Industrie 4.0 Die Autoren Maximilian Lukesch, M. Sc./MBA, ist wissenschaftlicher Mitarbeiter am Lehrstuhl f{\"u}r Betriebswirtschaftslehre, insb. Controlling und Logistik der Universit{\"a}t Regensburg. Dr. Florian Kellner ist Akademischer Rat am Lehrstuhl f{\"u}r Betriebswirtschaftslehre, insb. Controlling und Logistik der Universit{\"a}t Regensburg.}, language = {de} } @incollection{LukeschKellner, author = {Lukesch, Maximilian and Kellner, Florian}, title = {Geoinformationssysteme f{\"u}r Logistikmanager: Eine praxisorientierte Einf{\"u}hrung am Beispiel der Freeware QGIS}, series = {Praxishandbuch Logistik}, booktitle = {Praxishandbuch Logistik}, editor = {Pradel, Uwe-Heiner}, publisher = {Wolters Kluwer}, address = {K{\"o}ln}, language = {de} } @article{KellnerUtz, author = {Kellner, Florian and Utz, Sebastian}, title = {Sustainability in supplier selection and order allocation: Combining integer variables with Markowitz portfolio theory}, series = {Journal of Cleaner Production}, volume = {214}, journal = {Journal of Cleaner Production}, publisher = {Springer Nature}, doi = {10.1016/j.jclepro.2018.12.315}, pages = {462 -- 474}, abstract = {This research presents a decision support methodology for the multi-criteria supplier selection and order allocation problem. The proposed approach supports purchasing managers in assembling mid-term supplier portfolios while making them aware of the trade-offs between the supplier sustainability, the purchasing costs, and the overall supply risk. First, we propose a multi-objective optimization model with three objectives: to maximize the supplier sustainability, to select the supplier portfolio with the lowest purchasing costs, and to minimize the supply risk. Our model extends existing mathematical approaches that follow the portfolio theory fathered by H. Markowitz by integrating the aspect 'risk' into the supplier selection problem. Secondly, since we allow for integer variables in our model—in contrast to the classical Markowitz portfolio theory—we use the ε-constraint method to visualize the efficient surface. The possibility of considering the non-dominated set of supplier portfolios is advantageous for purchasing managers as they gain a picture of the different optimal supplier portfolios and are able to analyze the trade-offs between the different purchasing goals before making a decision. Finally, we illustrate the applicability of the proposed methodology in a real-world supplier selection and order allocation case from the automotive industry. In the example case, we identify 1754 optimal supplier portfolios that may be assembled based on the eight available suppliers. Our analyses show that each optimal portfolio consists of two suppliers, with one specific supplier being included in each portfolio. Furthermore, four suppliers are not part of any optimal solution.}, language = {en} } @article{KellnerSchneiderbauer, author = {Kellner, Florian and Schneiderbauer, Miriam}, title = {Further insights into the allocation of greenhouse gas emissions to shipments in road freight transportation: The pollution routing game}, series = {European Journal of Operational Research}, volume = {278}, journal = {European Journal of Operational Research}, number = {1}, publisher = {Elsevier}, doi = {10.1016/j.ejor.2019.04.007}, pages = {296 -- 313}, abstract = {At present, there is no globally accepted standard for the allocation of greenhouse gas (GHG) emissions to shipments in road freight transportation. The only official international standard for emission calculation of transport operations is the European Norm EN-16258. However, even this norm still allows choosing from several alternative emission allocation schemes. This research aims to harmonize the process of GHG declarations for supply chains by identifying among all allocation units specified by EN-16258 the one that describes a shipment's contribution to GHG emissions best. For this purpose, concepts of the cooperative game theory are used. First, we develop three transport scenarios that allow studying a shipment's effect on GHG: a vehicle routing problem, a network flow model, and a mixed scenario. Our approach extends previous research projects because we take into account that shipment characteristics in terms of origin, destination, weight, and volume consume transport capacities to different degrees, impact the routing of the commercial vehicles and, thus, determine GHG. Second, we present the results of a computational study that bases on the introduced transport scenarios and that compares the allocation vectors resulting from the EN-16258 allocation rules with the Shapley value, which serves as a benchmark for a shipment's contribution to GHG. Furthermore, we show how often the EN-16258 allocation principles are in line with a set of game theoretical fairness criteria. The results indicate that the allocation unit 'distance' is the closest to the game theory benchmark and most often in line with game theoretical fairness criteria.}, language = {en} } @article{KellnerLienlandUtz, author = {Kellner, Florian and Lienland, Bernhard and Utz, Sebastian}, title = {An a posteriori decision support methodology for solving the multi-criteria supplier selection problem}, series = {European Journal of Operational Research}, volume = {272}, journal = {European Journal of Operational Research}, number = {2}, publisher = {Springer}, doi = {10.1016/j.ejor.2018.06.044}, pages = {505 -- 522}, abstract = {This research presents a novel, state-of-the-art methodology for solving a multi-criteria supplier selection problem considering risk and sustainability. It combines multi-objective optimization with the analytic network process to take into account sustainability requirements of a supplier portfolio configuration. To integrate 'risk' into the supplier selection problem, we develop a multi-objective optimization model based on the investment portfolio theory introduced by Markowitz. The proposed model is a non-standard portfolio selection problem with four objectives: (1) minimizing the purchasing costs, (2) selecting the supplier portfolio with the highest logistics service, (3) minimizing the supply risk, and (4) ordering as much as possible from those suppliers with outstanding sustainability performance. The optimization model, which has three linear and one quadratic objective function, is solved by an algorithm that analytically computes a set of efficient solutions and provides graphical decision support through a visualization of the complete and exactly-computed Pareto front (a posteriori approach). The possibility of computing all Pareto-optimal supplier portfolios is beneficial for decision makers as they can compare all optimal solutions at once, identify the trade-offs between the criteria, and study how the different objectives of supplier portfolio configuration may be balanced to finally choose the composition that satisfies the purchasing company's strategy best. The approach has been applied to a real-world supplier portfolio configuration case to demonstrate its applicability and to analyze how the consideration of sustainability requirements may affect the traditional supplier selection and purchasing goals in a real-life setting.}, language = {en} } @book{KellnerBrabaender, author = {Kellner, Florian and Brab{\"a}nder, Christian}, title = {VBA mit Excel : Einf{\"u}hrung f{\"u}r Betriebswirte}, publisher = {Springer Gabler}, address = {Berlin}, isbn = {9783662597408}, doi = {10.1007/978-3-662-59740-8}, pages = {XI, 149}, abstract = {Dieses Buch bietet eine anwendungsorientierte Einf{\"u}hrung in die Programmierung mit Visual Basic for Applications (VBA) in Microsoft Excel. Es erm{\"o}glicht auch Einsteigern die selbstst{\"a}ndige L{\"o}sung kleiner bis mittelgroßer Programmieraufgaben aus dem betriebswirtschaftlichen Alltag. Der Schwierigkeitsgrad der Inhalte ist {\"u}berwiegend einfach gehalten, sodass Nutzer, die bereits grundlegende T{\"a}tigkeiten in MS Excel beherrschen, sich nach ihren jeweiligen Anforderungen entsprechend fortbilden k{\"o}nnen. Zahlreiche Praxisbeispiele und {\"U}bungen, die auf einem Windows-Betriebssystem entwickelt und getestet wurden, unterst{\"u}tzen das Lernen Schritt f{\"u}r Schritt und zeigen, wie hilfreich VBA durch Automatisierung und Individualisierung in jedem B{\"u}ro sein kann.}, language = {de} } @incollection{Gmeiner, author = {Gmeiner, Cornelia}, title = {Der Torturm der Veste Oberhaus in Passau}, series = {Passauer Jahrbuch}, volume = {61}, booktitle = {Passauer Jahrbuch}, editor = {Erkens, Franz-Reiner}, address = {Passau}, issn = {1862-3212}, pages = {83 -- 132}, language = {de} } @article{SchwaegerlWestfechtel, author = {Schw{\"a}gerl, Felix and Westfechtel, Bernhard}, title = {Integrated revision and variation control for evolving model-driven software product lines}, series = {Software and systems modeling}, volume = {18}, journal = {Software and systems modeling}, number = {6}, publisher = {Springer Science and Business Media}, issn = {1619-1366}, doi = {10.1007/s10270-019-00722-3}, pages = {3373 -- 3420}, abstract = {Software engineering projects are faced with abstraction, which is achieved by software models, historical evolution, which is addressed by revision control, and variability, which is managed with the help of software product line engineering. Addressing these phenomena by separate tools ignores obvious overlaps and therefore fails at exploiting synergies between revision and variation control for models. In this article, we present a conceptual framework for integrated revision and variation control of model-driven software projects. The framework reuses the abstractions of revision graphs and feature models and follows an iterative, revision-control-like approach to software product line engineering called product-based product line development. A single version (i.e., a variant of a selected revision) is made available in a workspace, where the user may apply arbitrary modifications. Based on a user-provided specification of the affected variants, the changes are automatically written back to a transparent repository that relies on an internal multi-version storage. The uniform handling of revisions and variants of models is achieved by transparently mapping version concepts to a semantic base layer, which is defined upon propositional logic. At the heart of the conceptual framework is a dynamic filtered editing model, which allows that the versioned artifacts and the feature model co-evolve. We contribute algorithms for checkout and commit, which satisfy a set of consistency constraints referring to variant specifications in an evolving feature model. This article furthermore addresses the orchestration of collaborative development by distributed replication and the well formedness of text and model artifacts to be checked out into the workspace. The Eclipse-based tool SuperMod demonstrates the feasibility of the conceptual framework. It allows the user to reuse arbitrary editing tools for text-based programming and/or Ecore-based modeling languages. An evaluation based on three case studies investigates the properties of SuperMod with a specific focus on filtered editing. The evaluation demonstrates that the dynamic filtered editing model reduces the cognitive complexity and the amount of user interaction necessary for variation control when compared to unfiltered model-driven approaches to software product line engineering.}, language = {en} } @article{CornetStadlerKongetal., author = {Cornet, Henriette and Stadler, Sebastian and Kong, Penny and Marinkovic, Goran and Frenkler, Fritz and Sathikh, Peer Mohideen}, title = {User-centred design of autonomous mobility for public transportation in Singapore}, series = {Transportation Research Procedia}, volume = {41}, journal = {Transportation Research Procedia}, publisher = {Elsevier}, address = {Amsterdam}, issn = {2352-1465}, doi = {10.1016/j.trpro.2019.09.038}, pages = {191 -- 203}, abstract = {The paper presents a set of methods for user-centred design of autonomous mobility for public transportation in the context of a multi-disciplinary research programme in Singapore, called TUMCREATE. While traffic engineers plan the operation of the new mobility system, the Industrial Designers of TUMCREATE take on the role of designing the autonomous vehicles (AVs) and infrastructure for greater comfort and a positive travel experience for users. Tasks have been identified to promote user acceptance and facilitate the operation of autonomously driven vehicles for public transport. To fulfil these tasks, conventional design methods have been enhanced with Virtual Reality (VR) technology and with simulations developed by the computer scientists of TUMCREATE. Since public transportation is a complex and broad area, it cannot be investigated with a single design method. First results showed that conventional methods that consider the Universal Design principles guarantee the accessibility, usability and understandability of AVs and stations. VR has been identified as a suitable tool for Industrial Designers to evaluate communication concepts between AVs and pedestrians. This confirms that digital tools (i.e. VR) enhance conventional design methods, especially with regard to technologies that are not available on the market yet (e.g. AVs)}, language = {en} } @inproceedings{KrausBrueckl, author = {Kraus, Hermann and Br{\"u}ckl, Oliver}, title = {Automated use of wired measures in grid planning for solving current and voltage band problems}, series = {Power and Energy Student Summit (PESS) 2019, Magdeburg}, volume = {77}, booktitle = {Power and Energy Student Summit (PESS) 2019, Magdeburg}, publisher = {Otto-von-Guericke-Universit{\"a}t, Institut f{\"u}r Elektrische Energiesysteme}, address = {Magdeburg}, isbn = {978-3-944722-84-9}, doi = {10.24352/UB.OVGU-2019-086}, pages = {207 -- 211}, abstract = {This work deals with the use of cable exchange and parallel cabling as network expansion measures in the context of an automated grid planning for the elimination of current and voltage band problems in a distribution network. Inter alia, reference is made to a higher-level program, which is being developed in the EU project "CrossEnergy", and the procedures for remedying the limit value violations are presented.}, subject = {Netzplanung}, language = {en} } @book{OPUS4-6660, title = {Wohnungslosigkeit in Regensburg : Texte von Studierenden der Sozialen Arbeit : Projektseminar Sommersemester 2018}, editor = {Scheffler, Gabriele}, publisher = {Ostbayerische Technische Hochschule Regensburg}, address = {Regensburg}, language = {de} } @misc{Schildbach, author = {Schildbach, Ina}, title = {Die „soziale Frage als nationale zu rethematisieren", oder: von der „Arbeitsweltvergessenheit der Populismusforschung"}, series = {sub\urban - Zeitschrift f{\"u}r kritische Stadtforschung}, volume = {7}, journal = {sub\urban - Zeitschrift f{\"u}r kritische Stadtforschung}, number = {1/2}, publisher = {sub\urban e. V.}, issn = {2197-2567}, doi = {10.36900/suburban.v7i1/2.472}, pages = {259 -- 263}, language = {de} } @article{Schildbach, author = {Schildbach, Ina}, title = {Aufruf: Nationales Denken {\"u}berwinden!}, series = {Feinschwarz. Theologisches Feuilleton}, journal = {Feinschwarz. Theologisches Feuilleton}, publisher = {Verein Feinschwarz}, address = {Wien}, issn = {2518-3982}, language = {de} } @incollection{Goertler, author = {G{\"o}rtler, Michael}, title = {Politik, Bildung, Beschleunigung: {\"U}berlegungen zur Bedeutung einer Zeit-Diagnose f{\"u}r die politische Bildung}, series = {Gesellschaft im Wandel!? Neue Herausforderungen f{\"u}r die politische Bildung und ihre Didaktik}, booktitle = {Gesellschaft im Wandel!? Neue Herausforderungen f{\"u}r die politische Bildung und ihre Didaktik}, editor = {Lotz, Mathias and Pohl, Kerstin}, publisher = {Wochenschau Verlag}, address = {Frankfurt/M.}, isbn = {978-3-7344-0827-4}, pages = {61 -- 68}, language = {de} } @misc{Schildbach, author = {Schildbach, Ina}, title = {Michael Klundt: Gestohlenes Leben. Kinderarmut in Deutschland. PapyRossa Verlag (K{\"o}ln) 2019. 197 Seiten. ISBN 978-3-89438-696-2}, series = {Sozialnet Rezensionen}, journal = {Sozialnet Rezensionen}, publisher = {socialnet}, address = {Bonn}, issn = {2190-9245}, language = {de} } @incollection{Schildbach, author = {Schildbach, Ina}, title = {"Die neue deutsche Soziale Frage": Armut und Sozialstaatsversagen als Grund f{\"u}r rechtspopulistischen Erfolg?}, series = {Rechtpopulismus im Fokus - Theoretische und praktische Herausforderungen f{\"u}r die politische Bildung}, booktitle = {Rechtpopulismus im Fokus - Theoretische und praktische Herausforderungen f{\"u}r die politische Bildung}, editor = {Boehnke, Lukas and Thran, Malte and Wunderwald, Jacob}, publisher = {Springer VS}, address = {Wiesbaden}, isbn = {978-3-658-24299-2}, doi = {10.1007/978-3-658-24299-2_5}, pages = {73 -- 88}, abstract = {Seit den Aufm{\"a}rschen von „Patriotische Europ{\"a}er gegen die Islamisierung des Abendlandes" (Pegida) und den Wahlerfolgen der Alternative f{\"u}r Deutschland (AfD) besch{\"a}ftigt das Ph{\"a}nomen des Rechtspopulismus und -extremismus {\"O}ffentlichkeit und Politik. Tats{\"a}chlich ist dieses jedoch {\"a}lter als die Aufgeregtheit der Diskussion glauben macht. In diesem Sinne bemerkt beispielsweise der renommierte Konfliktforscher Wilhelm Heitmeyer, der mit seiner Forscher_innengruppe seit langem auf die Verbreitung von rechten Einstellungen in Deutschland hinweist, dass ihn der Erfolg der AfD keineswegs wundere (vgl. Interview in der Berliner Zeitung vom 22.10.16).}, language = {de} }