TY - RPRT A1 - Brückl, Oliver A1 - Eller, Johannes A1 - Habler, Florian A1 - Sator, Tobias A1 - Sippenauer, Thomas A1 - Strohmayer, Bernhard A1 - Stuber, Johannes T1 - Zukünftige Bereitstellung von Blindleistung und anderen Maßnahmen für die Netzsicherheit : Endbericht zum Dienstleistungsauftrag N2 - Der Zweck dieser Studie liegt darin, aufzuzeigen, welche neuen Herausforderungen für den sicheren Netzbetrieb durch den Ausbau der erneuerbaren Energien entstehen und wie diesen zu begegnen ist. Dabei sind praxisnahe Handlungsempfehlungen abzuleiten und Vorschläge für erforderliche Anpassungen zu unterbreiten. Gegenstand der Be-trachtungen sind die - Blindleistung, - Kurzschlussleistung, - Momentanreserve und der - Netzwiederaufbau. Im Fokus dieser Betrachtungen steht allerdings die Bereitstellung der Blindleistung. Konkret soll diese Studie dazu folgende drei Leitfragen beantworten: - Werden die Potenziale der vorhandenen Technologien schon heute kosteneffi-zient genutzt? - Lässt sich mehr Kosteneffizienz durch eine transparentere und mehr marktge-stützte Beschaffung erzielen? - Welche Anreize wären zu setzen, um die notwendige Mindesterzeugung konven-tioneller Kraftwerke zu reduzieren. Alle drei Leitfragen münden letztlich in der übergeordneten Zielsetzung, eine höchst-mögliche Kosteneffizienz bei der Bereitstellung von SDL zu erlangen. KW - Blindleistung Y1 - 2016 UR - https://www.bundeswirtschaftsministerium.de/Redaktion/DE/Publikationen/Studien/zukuenftige-bereitstellung-von-blindleistung-und-anderen-massnahmen-fuer-die-netzsicherheit.pdf?__blob=publicationFile&v=9 ER - TY - CHAP A1 - Buchmann, Thomas A1 - Schwägerl, Felix T1 - Breaking the Boundaries of Meta Models and Preventing Information Loss in Model-Driven Software Product Lines T2 - Proceedings of the 11th International Conference on Evaluation of Novel Software Approaches to Software Engineering, Vol 1, 2016, Rome, Italy N2 - Model-driven software product line engineering is an integrating discipline for which tool support has become available recently. However, existing tools are still immature and have several weaknesses. Among others, limitations in variability, caused by meta model restrictions, and unintended information loss are not addressed. In this paper, we present two conceptual extensions to model-driven product line engineering based on negative variability, being alternative mappings and surrogates. Alternative mappings allow for unconstrained variability, mitigating meta model restrictions by virtually extending the underlying multi-variant domain model. Surrogates prevent unintended information loss during product derivation based on a contextsensitive product analysis, which can be controlled by a declarative OCL-based language. Both extensions have been implemented in FAMILE, a model-driven product line tool that is based on EMF, provides dedicated consistency repair mechanisms, and completely automates application engineering. The added value of alternative mappings and surrogates is demonstrated by a running example. KW - Software Product Lines KW - Model-Driven Development KW - Unconstrained Variability KW - Information Loss KW - Negative Variability KW - Application Engineering Y1 - 2016 U6 - https://doi.org/10.5220/0005789100730083 SP - 83 PB - SCITEPRESS - Science and and Technology Publications ER - TY - CHAP A1 - Schwägerl, Felix A1 - Buchmann, Thomas A1 - Westfechtel, Bernhard T1 - Multi-variant model transformations - a problem statement T2 - Proceedings of the 11th International Conference on Evaluation of Novel Software Approaches to Software Engineering N2 - Model Transformations are a key element of Model-Driven Software Engineering. As soon as variability is involved, transformations become increasingly complicated. The lack of support for variability in model transformations impairs the acceptance of approaches to organized reuse such as software product lines. In this position paper, the general problem of multi-variant model transformations is formulated for MOF-based, XMI-serialized models. A simplistic case study is presented to specify the input and the expected output of such a transformation. Furthermore, requirements for tool support are defined, including a standardized representation of both multi-variant model instances and variability information, as well as an execution specification for multi-variant transformations. A literature review reveals that the problem is weakly identified and often solved using ad-hoc solutions; there exists no tool providing a general solution to the proposed problem statement. The observation s presented here may serve for the future development of standards and tools. KW - Model-Driven Software Engineering KW - Software Product Lines KW - Model Transformations KW - Code Generation Y1 - 2016 SN - 978-989-758-189-2 U6 - https://doi.org/10.5220/0005878702030209 SN - 2184-4895 SP - 203 EP - 209 PB - SCITEPRESS ER - TY - GEN A1 - Schermer, Detleff T1 - Test set-up and proposed testing procedure for the determination of masonry walls under in-plane shear loadings : Brick and Block Masonry: Trends, Innovations and Challenges T2 - Proceedings of the 16th International Brick and Block Masonry Conference (IMAC), Padova, Italy, 26-30 June 2016 Y1 - 2016 SP - 1883 EP - 1888 PB - Routledge ER - TY - THES A1 - Florian Kellner, T1 - Distribution Network Analysis for Fast Moving Consumer Goods N2 - This dissertation summarizes three reserach contributions that have been published in academic journals. The reserach analyzes economic and environmental sensitivites of Fast Moving Consumer Goods distribution networks. Y1 - 2016 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:355-epub-328237 SN - https://epub.uni-regensburg.de/32823/ PB - University of Regensburg CY - Regensburg ER - TY - JOUR A1 - Lukesch, Maximilian A1 - Kellner, Florian T1 - Green Controlling in Logistiknetzwerken JF - Controlling : Zeitschrift für erfolgsorientierte Unternehmenssteuerung Y1 - 2016 U6 - https://doi.org/10.15358/0935-0381-2016-8-9-526 VL - 28 IS - 8-9 SP - 526 EP - 529 PB - C.H. Beck ER - TY - JOUR A1 - Kellner, Florian T1 - Insights into the effect of traffic congestion on distribution network characteristics – a numerical analysis based on navigation service data JF - International Journal of Logistics Research and Applications N2 - This research studies effects that the average increase in travel times due to road traffic congestion has on characteristics of an existing distribution network. It presents the most detailed estimate of ‘on-the-road’ effects on distribution network characteristics up to now, from the network modelling perspective and from the processed data point of view. A concrete network model allowing for the representation of all relevant transportation flows is presented. The processed traffic information relies on navigation service data. The use of such data allows the requirements that arise for the traffic analysis of a whole distribution network to be met. It is shown that this data source may considerably contribute in forthcoming research. The effects of traffic congestion are quantified to get insights into the extent to which regular traffic congestion affects distribution network characteristics and to understand the mitigating effect when the number of distribution centres is increased. Y1 - 2016 U6 - https://doi.org/10.1080/13675567.2015.1094043 VL - 19 IS - 5 SP - 395 EP - 423 PB - Taylor & Francis ER - TY - JOUR A1 - Neumüller, Claudia A1 - Lasch, Rainer A1 - Kellner, Florian T1 - Integrating sustainability into strategic supplier portfolio selection JF - Management decision N2 - Purpose – The purpose of this paper is to propose a comprehensive methodology and a problem-specific model for the configuration of the optimal strategic supplier portfolio in terms of traditional, performance-related objectives and sustainability targets. Design/methodology/approach – To bridge the research gap, i.e., to align strategic supplier portfolio selection with corporate sustainability targets, a hybrid model of the analytic network process (ANP) and goal programming (GP) is developed. To validate the model, a case example is presented and managerial feedback is collected. Findings – By enabling the integration of sustainability targets into strategic supplier portfolio configuration, the hybrid ANP-GP model contributes to research in the area of sustainable supply chain management. Results indicate that simplifying the model by omitting one or more details may lead to unfortunate actions. Research limitations/implications – The model has been applied using a case example in the automotive industry. To strengthen the findings, it should be examined under other terms as well. Practical implications – Integrating economic, environmental, and social targets into strategic supplier portfolio configuration reduces supply risks and promotes the achievement of the sustainability goals of the purchasing company. Social implications – Strategic supplier selection counts among the decisions that have an impact on the environment and society for several years. Configuring economically rational, environmentally friendly, and socially responsible supplier bases supports worldwide efforts towards sustainable development. Originality/value – Although sustainable supplier selection has gained importance in recent years, this is the first time that a comprehensive model for the determination of the optimal strategic supplier portfolio in terms of performance-related objectives and sustainability targets has been proposed. Y1 - 2016 U6 - https://doi.org/10.1108/MD-05-2015-0191 VL - 54 IS - 1 SP - 194 EP - 221 PB - Emerald ER - TY - JOUR A1 - Kellner, Florian T1 - Exploring the impact of traffic congestion on CO2 emissions in freight distribution networks JF - Logistics Research N2 - This research quantifies the impact that regular road traffic congestion has on the CO2 emissions of a real-world distribution network, and it studies the consequences when the number of distribution centers changes. For this purpose, this study makes use of a network model allowing for a detailed representation of all relevant transport operations, including production flows between factories and distribution centers, line haul shipments between distribution centers and customers, and round/delivery trips between transshipment points and retailer locations for the last mile. The processed trip and traffic information does not rely on standard traffic data collection approaches, such as interviews, in situ technologies, or floating car data, but the road traffic data are retrieved from an online navigation service, such as Bing Maps, Google Maps, Inrix, Here, and TomTom. This study proves that online navigation services may considerably contribute to future research projects analyzing CO2 sensitivities and greenhouse gas cutting opportunities in logistics networks. Y1 - 2016 U6 - https://doi.org/10.1007/s12159-016-0148-5 VL - 9 PB - Springer Nature ER - TY - JOUR A1 - Kellner, Florian T1 - Analyse logistischer Systeme mittels Online-Navigationsdiensten – Bessere Planung auf Grundlage besserer Daten JF - HMD Praxis der Wirtschaftsinformatik N2 - Online-Navigationsdienste ermöglichen die Planung einer Reise von einem Start- zu einem Ziel-Ort. Die Berechnung von Reisedauer und Streckenlänge erfolgt auf Grundlage eines detaillierten Straßennetzes und unter Berücksichtigung Orts- und Zeit-typischer Verkehrsaufkommen. Dieser Beitrag zeigt, inwiefern Online-Navigationsdienste die Planung und Analyse logistischer Systeme unterstützen können. Er thematisiert insbesondere die Qualität der zur Verfügung gestellten Verkehrsinfrastrukturdaten und hebt die komparativen Vorteile des Einsatzes von Online-Navigationsdiensten im Vergleich zu ‚herkömmlichen‘ Verkehrsinformationsquellen hervor. Ein Anwendungsfall, bei dem die durch Transportaktivitäten verursachten CO2-Emissionen eines Güternahverkehrsnetzes untersucht werden, verdeutlicht die gewonnenen Erkenntnisse. T2 - Using online navigation services for logistics systems analyses – better planning based on better data Y1 - 2016 U6 - https://doi.org/10.1365/s40702-016-0245-6 VL - 53 IS - 6 SP - 894 EP - 905 PB - Springer CY - Wiesbaden ER - TY - JOUR A1 - Kellner, Florian T1 - Allocating greenhouse gas emissions to shipments in road freight transportation: Suggestions for a global carbon accounting standard JF - Energy Policy N2 - The European Norm EN 16258 was published in 2012 to provide a common methodology for the calculation and declaration of energy consumption and greenhouse gas emissions related to any transport operation. The objective was to offer a pragmatic and scientifically-acceptable approach that allows a wide group of users to prepare standardized, accurate, credible, comparable, and verifiable energy consumption and emission declarations. However, in its current form, EN 16258 contains gaps and ambiguities, and leaves room for interpretation, which makes comparisons of supply chains difficult. This research aims to overcome the shortcomings in the domain of allocating emissions from road freight transport operations to single shipments. Based on a discussion of emission drivers and the results of numerical experiments comparing the allocation vectors created by the EN 16258 allocation rules with those generated by the Shapley value, which is claimed to be the benchmark, ‘distance’ is identified as the single most useful unit for bridging the trade-off between accuracy and simplicity better than the other recommended allocation schemes. Thus, this paper claims that future versions of EN 16258 should only allow the allocation unit ‘distance.’ This will promote the accurateness, simplicity, consistency, transparency, and comparability of emission declarations. Y1 - 2016 U6 - https://doi.org/10.1016/j.enpol.2016.09.030 VL - 98 SP - 565 EP - 575 CY - Elsevier ER - TY - INPR A1 - Kellner, Florian A1 - Lienland, Bernhard A1 - Utz, Sebastian T1 - An a Posteriori Multi-Objective Supplier Portfolio Selection Approach Under Risk and Sustainability Considerations T2 - SSRN Electronic Journal N2 - This research presents a novel, state-of-the-art methodology for solving the multi-criteria supplier selection problem under risk and sustainability considerations. The approach combines multi-objective optimization with the analytic network process to meet the requirements for supplier portfolio configuration with sustainability considerations. To integrate the aspect ‘risk’ into the supplier selection problem, this research develops 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: to minimize the purchasing costs, to select the supplier portfolio with the highest logistics service, to minimize the supply risk, and to order 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 which analytically computes a set of efficient solutions and provides graphical decision support by 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 aspects of supplier portfolio configuration may be balanced to finally choose the composition that satisfies the purchasing company’s strategy at 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. Y1 - 2016 U6 - https://doi.org/10.2139/ssrn.2901390 N1 - Erschienen bei Elsevier im European Journal of Operational Research 272, 2025(2): https://doi.org/10.1016/j.ejor.2018.06.044 ER - TY - CHAP A1 - Liebetruth, Thomas T1 - Megatrends, recent developments, its impact on logistics processes and possible reactions - a bavarian perspective T2 - Carpathian Logistics Congress, CLC : November 4th-6th 2015, Priessnitz Spa, Jesenik, Czech Republic, EU : congress proceedings N2 - Megatrends have a high impact on logistics processes. Nevertheless some companies are still hesitating to start initiatives to react to it. Therefore this paper gives an overview of the impact of megatrends on logistics processes. It then gives examples of innovative logistical solutions, how companies can react to these trends and even improve processes and thus create a competitive advantage with a special focus on Bavarian political, industrial and academic initiatives. KW - Digitalization KW - Collaborative Robotics KW - Bavaria KW - Globalization KW - Industry 4.0 KW - Virtual Reality KW - Supply Chain Management KW - Process Improvement KW - Megatrends KW - Logistics KW - Global Sourcing Y1 - 2016 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-80451 UR - https://www.confer.cz/clc/2015/2755-megatrends-recent-developments-its-impact-on-logistics-processes-and-possible-reactions-a-bavarian-perspective SN - 978‐80‐87294‐61-1 SN - 2694-9318 SP - 10 EP - 14 PB - TANGER Ltd. CY - Ostrava ER - TY - CHAP A1 - Buchmann, Thomas A1 - Schwägerl, Felix T1 - Advancing Negative Variability in Model-Driven Software Product Line Engineering T2 - Communications in Computer and Information Science N2 - Model-driven software product line engineering aims at increasing the productivity of development of variational software. The principle of negative variability is realized by a multi-variant domain model, from which elements not needed for specific product variants are removed. The application of negative variability is impeded by two factors: First, metamodel restrictions lead to limited expressiveness of the multi-variant domain model. Second, unintended information loss may occur during product derivation. In this paper, we present two conceptual extensions to model-driven product line engineering based on negative variability, being alternative mappings and surrogates. Alternative mappings virtually extend the multi-variant domain model. Surrogates repair unintended information loss by context-sensitive analyses. Both extensions have been implemented in FAMILE, a model-driven product line tool that is based on EMF. Alternative mappings are defined in a dedicated mapping model. Surrogate rules may be defined in a declarative domain-specific language and are taken into account during product derivation. The added value of alternative mappings and surrogates is demonstrated by a running example, a UML-based graph library. KW - Unify Modeling Language KW - Alternative Mapping KW - Eclipse Modeling Framework KW - Feature Configuration KW - Surrogate Rule Y1 - 2016 SN - 9783319563893 U6 - https://doi.org/10.1007/978-3-319-56390-9_1 SN - 1865-0929 SP - 1 EP - 26 PB - Springer International Publishing CY - Cham ER - TY - CHAP A1 - Spiegel, Daniela A1 - Kurapkat, Dietmar ED - Sack, Dorothée ED - Gussone, Martin T1 - Die Ambivalenzen herrschaftlichen Residierens zwischen Orient und Okzident T2 - Wohnen – Reisen – Residieren. Herrschaftliche Repräsentation zwischen temporärer Hofhaltung und dauerhafter Residenz in Orient und Okzident Y1 - 2016 SN - 9783731900375 SP - 17 EP - 38 PB - Michael Imhof CY - Petersberg ER - TY - JOUR A1 - Spiller, Ralf A1 - Degen, Matthias A1 - Kronewald, Elke A1 - Guertler, Katherine T1 - Media watchblogs as an instrument of media accountability: An international survey JF - Journal of Applied Journalism & Media Studies N2 - Media watchdog weblogs can play an important role in media accountability, provided that the bloggers are regularly active and have an appropriate awareness of their role in the media landscape. The following article examines the presence and influence of media watchblogs in selected nations, as well as the operators’ standards and perceptions of their roles. In semi-structured qualitative interviews, operators of watchblogs in Germany, Austria, Switzerland and the United Kingdom discussed their perceptions of their role, their ethical guidelines, their financing and any conflicts of interest, and their projections for the future. The interviews reveal that most media watchbloggers do not interpret their role to be a Fifth Estate with a mandate to monitor the mass media. The watchbloggers are reluctant to accept and uphold formal ethical and quality criteria, and limitations on time and money make them unable to guarantee ongoing critical media analysis. For these reasons, media watchblogs are determined to be a weak instrument of media accountability. KW - ethics KW - expert interviews KW - international comparative study KW - media accountability KW - role identity KW - watchblogs Y1 - 2016 U6 - https://doi.org/10.1386/ajms.5.2.151_1 SN - 2049-9531 VL - 5 IS - 2 SP - 151 EP - 176 PB - intellect ER - TY - JOUR A1 - Lienland, Bernhard T1 - The Implementation of a Cash-Flow-Based Mathematical R&D Project Selection Model JF - International Journal of Information Technology Project Management (IJITPM) N2 - Customer project selection is a challenge for many industrial companies. An inappropriate project selection approach can lead to constraint violations, high fixed costs, and suboptimal portfolios. To overcome these problems a cash-flow-based linear optimization model was developed in partnership with a tier-1 automotive supplier. Implementation barriers had been verified through a case study conducted at two organizational hierarchies. Results suggest that an application at the operating levels is possible. At higher levels, though, product and firm complexity require major implementation efforts. This article serves theorists as well as practitioners in multiple regards. First, an overview of existing project selection methods and their application in practice is provided. Additionally, the supplier's current appraisal process is depicted. Second, operations research implementation barriers are identified and validated for the adoption of the proposed mathematical project selection approach. Third, a guideline including procedures to overcome experienced difficulties is presented. Y1 - 2016 U6 - https://doi.org/10.4018/IJITPM.2016070102 VL - 7 IS - 3 PB - IGI Global ER - TY - JOUR A1 - Zeng, Li A1 - Kellner, Florian A1 - Lienland, Bernhard T1 - Rucksackprobleme in der Praxis – schnelle Entscheidungen schwer gemacht JF - HMD Praxis der Wirtschaftsinformatik N2 - Unternehmen sind häufig mit Situationen konfrontiert, in denen schnell Entscheidungen bezüglich der Auswahl mehrerer Handlungsalternativen gefunden werden müssen. Mathematische Verfahren können hierbei unterstützen, z. B. für die Ermittlung einer ersten Diskussionsbasis. Verfügbare Softwarelösungen errechnen zwar häufig optimale Ergebnisse, zeigen jedoch Schwächen bei der praktischen Anwendbarkeit. So ist eine Einarbeitung in komplexe Optimierungssoftware für die teilweise sporadisch auftretenden Probleme in der Regel für Unternehmen nicht möglich, unter anderem auch unter Anbetracht der teilweise hohen Kosten der Standardsoftware und dem benötigten hohen Einarbeitungsaufwand. Gerade Problemstellungen in Fachbereichen, die nicht auf mathematische Problemlösung spezialisiert sind, münden daher regelmäßig in Ineffizienzen. Basierend auf den in der Literatur diskutierten Lösungsansätzen wurde ein praxisorientierter Ansatz zur Entscheidungsunterstützung für Rucksackprobleme bzw. 0–1 Probleme mithilfe von Genetischen Algorithmen (GA) entwickelt und technisch in Microsoft Excel® umgesetzt. Ein Praxistest bei einem chinesischen Textilunternehmen belegt erhöhte Effektivität und Effizienz. Die Software kann kostenfrei nach MIT Lizenz unter http://www.solvega.de/ heruntergeladen werden. KW - Entscheidungsunterstützung KW - 0–1 Entscheidungen KW - Knapsack KW - Rucksackproblem KW - Optimierungssoftware KW - Gewinnmaximierung KW - Genetische Algorithmen Y1 - 2016 U6 - https://doi.org/10.1365/s40702-016-0207-z VL - 53 SP - 310 EP - 322 PB - Springer CY - Wiesbaden ER - TY - JOUR A1 - Görtler, Michael T1 - Politische Bildung in unruhigen Zeiten? Ein Beispiel für eine Theorie-Praxis-Reflexion JF - forum erwachsenenbildung KW - Evangelische Erwachsenenbildung KW - Politische Bildung KW - Tagungsbericht KW - Theorie-Praxis-Beziehung Y1 - 2016 UR - https://www.waxmann.com/waxmann-zeitschriften/waxmann-zeitschriftendetails/?tx_p2waxmann_pi2[zeitschrift]=ZEI1028&tx_p2waxmann_pi2[ausgabe]=AUG100240&tx_p2waxmann_pi2[artikel]=ART101908&tx_p2waxmann_pi2[action]=artikel SN - 1433-769X VL - 49 IS - 2 SP - 48 EP - 49 PB - Waxmann CY - Münster ER - TY - BOOK A1 - Görtler, Michael T1 - Politische Bildung und Zeit BT - Eine didaktische Untersuchung zur Bedeutung von Zeit für die politische Bildung N2 - Michael Görtler richtet in dieser Untersuchung den Fokus auf die Bedeutung von Zeit für die politische Bildung, da die Zeitlichkeit politischer Bildungsprozesse und demokratischer Politik in der Didaktik der politischen Bildung bisher kaum beachtet wurde. Der Autor verkleinert diese Lücke, erweitert den Fachdiskurs und gibt praktische Impulse für die politische Bildungsarbeit. Im Mittelpunkt steht die Frage nach dem expliziten wie impliziten Sichtbarwerden der Zeit in Ansätzen der Didaktik der politischen Bildung und der Bildungs- und Sozialwissenschaften. Dabei wird auch geprüft, welche didaktischen Herausforderungen in Bezug auf die Ziele, Inhalte und die Gestaltung von Lehr- und Lernprozessen auf der Subjekt- und Objektseite sowie in der Vermittlung zwischen beiden Seiten beachtet werden müssen. KW - Didaktik KW - Lehr-Lern-Prozess KW - Politische Bildung KW - Zeitbewusstsein KW - Zeit KW - Beschleunigung KW - Demokratie KW - Nachhaltige Entwicklung KW - Kritische politische Bildung Y1 - 2016 SN - 3-658-14194-8 U6 - https://doi.org/10.1007/978-3-658-14194-3 PB - Springer CY - Wiesbaden ER -