@inproceedings{MederPlumbaumRaczkowskietal., author = {Meder, Michael and Plumbaum, Till and Raczkowski, Aleksander and Jain, Brijnesh and Albayrak, Sahin}, title = {Gamification in E-Commerce : Tangible vs. Intangible Rewards}, series = {Proceedings of the 22nd International Academic Mindtrek Conference : Academic Mindtrek 2018, Tampere Finland, 10.10.2018 - 11.10.2018}, booktitle = {Proceedings of the 22nd International Academic Mindtrek Conference : Academic Mindtrek 2018, Tampere Finland, 10.10.2018 - 11.10.2018}, publisher = {ACM}, address = {New York, NY}, isbn = {9781450365895}, doi = {10.1145/3275116.3275126}, pages = {11 -- 19}, abstract = {Increasing user participation or changing behavior are key goals when applying gamification. Existing studies in domains such as education, health, and enterprise show that gamification can have a positive impact on meeting these goals. However, there is still a lack of detailed insights into how certain game design elements affect user behavior and motivation. To gain further insight, this paper presents a user study in the field with 20, 000 participants of a mobile e-commerce application over a one-month time period to analyze the impact of gamification in the e-commerce domain and to compare the effectiveness of tangible versus intangible rewards. Results show that gamification has a positive impact in the e-commerce domain. The study also reveals that tangible rewards increase the user activity substantially more than intangible rewards. We further show how tangible rewards affect certain user types and provide a first discussion on the lastingness of these rewards.}, language = {en} } @inproceedings{SchildgenKrueckDessloch, author = {Schildgen, Johannes and Kr{\"u}ck, Yannick and Deßloch, Stefan}, title = {Transformations on Graph Databases for Polyglot Persistence with NotaQL}, series = {Datenbanksysteme f{\"u}r Business, Technologie und Web, 17. Fachtagung des GI-Fachbereichs "Datenbanken und Informationssyteme" (DBIS) : 06.-10.03.2017 in Stuttgart, Deutschland (BTW 2017)}, booktitle = {Datenbanksysteme f{\"u}r Business, Technologie und Web, 17. Fachtagung des GI-Fachbereichs "Datenbanken und Informationssyteme" (DBIS) : 06.-10.03.2017 in Stuttgart, Deutschland (BTW 2017)}, number = {CD-ROM}, editor = {Mitschang, Bernhard and Nicklas, Daniela and Leymann, Frank and Sch{\"o}ning, Harald and Herschel, Melanie and Teubner, Jens and H{\"a}rder, Theo and Kopp, Oliver and Wieland, Matthias}, publisher = {Gesellschaft f{\"u}r Informatik, Bonn}, pages = {83 -- 102}, language = {en} } @article{SchleglRobatzekKuceraetal., author = {Schlegl, Peter and Robatzek, Patrick and Kucera, Markus and Volbert, Klaus and Waas, Thomas}, title = {Performance analysis of mobile radio for automatic control in smart grids}, series = {International Journal of Advancements in Electronics and Electrical Engineering}, volume = {4}, journal = {International Journal of Advancements in Electronics and Electrical Engineering}, number = {1}, issn = {2319-7498}, pages = {69 -- 75}, abstract = {In the context of a "Smart Grid" research project, together with industrial partners, the OTH-Regensburg realized an intelligent medium-voltage grid in the local area. Goal was to improve the current voltage regulation and to counter the problems with inconsistent energy feed-in of decentralized renewable energy producers. In this paper we discuss the possibilities of using 3rd generation (3G) cellular networks (UMTS) as basic technology to communicate the voltage-levels within a medium-voltage grid. We build an experimental hardware setup to generate data-traffic as specified for the smart grid. By analyzing the performance of 3G cellular networks in terms of transmission latency and rate of failure, we tried to evaluate the usability of this technology for such critical data exchange. Though mobile communication in its structure is not specified for the use of transmitting such infrastructure critical data, the results show a promising high reliability with low transmission latency. The experiments served just to test a fragment of the conditions of use in a real scenario. An expanded test scope is needed to further analyze the performance of mobile radio for automatic control in smart grids. In the end the results discussed in this paper led to a successful prototype of an intelligent medium-voltage grid with mobile radio as communication technology}, language = {en} } @inproceedings{DegueldreWaasKucera, author = {Degueldre, Dennis and Waas, Thomas and Kucera, Markus}, title = {Electromagnetic Emission of an Optical-to-BroadR-Reach Converter}, series = {Proceedings of the 4th International Conference on Pervasive and Embedded Computing and Communication Systems (PECCS), 2014, Lisbon, Portugal}, booktitle = {Proceedings of the 4th International Conference on Pervasive and Embedded Computing and Communication Systems (PECCS), 2014, Lisbon, Portugal}, isbn = {978-989-758-000-0}, issn = {2184-2817}, doi = {10.5220/0004711401310135}, pages = {131 -- 135}, abstract = {The automotive solution for Ethernet is BroadR-Reach, which cannot be found as a common Ethernet-interface in the consumer industry. Hence a media converter from IEEE 802.3 Ethernet to BroadR-Reach is needed to debug and test the communication of automotive devices under test (DUT). If the functionality of a BroadR-Reach connection has to be tested for electromagnetic compatibility (EMC), a BroadR-Reach to optical media converter is needed, which has to comply to the same EMC test specifications as the DUT. This research explains the internal structure of a media converter and defines a test setup for copper bound emission test of BroadR-Reach. By using a standardized stripline measurement like it is common for electromagnetic emission test, it could be shown, that the tested Technica/Tinytron media converter can safely be used inside an EMC chamber.}, language = {en} } @inproceedings{SahaNayakBaumann, author = {Saha, Debjoy and Nayak, Shravan and Baumann, Timo}, title = {Merkel Podcast Corpus: A Multimodal Dataset Compiled from 16 Years of Angela Merkel's Weekly Video Podcasts}, series = {Proceedings of the 13th Conference on Language Resources and Evaluation (LREC 2022), Marseille, 20-25 June 2022}, booktitle = {Proceedings of the 13th Conference on Language Resources and Evaluation (LREC 2022), Marseille, 20-25 June 2022}, organization = {European Language Resources Association (ELRA)}, pages = {2536 -- 2540}, abstract = {We introduce the Merkel Podcast Corpus, an audio-visual-text corpus in German collected from 16 years of (almost) weekly Internet podcasts of former German chancellor Angela Merkel. To the best of our knowledge, this is the first single speaker corpus in the German language consisting of audio, visual and text modalities of comparable size and temporal extent. We describe the methods used with which we have collected and edited the data which involves downloading the videos, transcripts and other metadata, forced alignment, performing active speaker recognition and face detection to finally curate the single speaker dataset consisting of utterances spoken by Angela Merkel. The proposed pipeline is general and can be used to curate other datasets of similar nature, such as talk show contents. Through various statistical analyses and applications of the dataset in talking face generation and TTS, we show the utility of the dataset. We argue that it is a valuable contribution to the research community, in particular, due to its realistic and challenging material at the boundary between prepared and spontaneous speech. Accepted at LREC 2022}, language = {en} } @inproceedings{KaessStrahringerWestner, author = {K{\"a}ss, Sebastian and Strahringer, Susanne and Westner, Markus}, title = {Drivers and Inhibitors of Low Code Development Platform Adoption}, series = {2022 IEEE 24th Conference on Business Informatics (CBI): 15.06. - 17.06.2022, Amsterdam}, booktitle = {2022 IEEE 24th Conference on Business Informatics (CBI): 15.06. - 17.06.2022, Amsterdam}, publisher = {IEEE}, doi = {10.1109/CBI54897.2022.00028}, pages = {196 -- 205}, abstract = {When done right, the use of low code development promises a significant competitive advantage in the software development process for organizations. Thus, multiple vendors have created low code development platforms to ease the use of low code development. However, current research on low code development platforms mainly focuses on the technological aspects of the platforms but not on their adoption. Hence, it remains unclear what drives and inhibits the adoption of low code development platforms. We conducted a literature review and identified thirteen factors that inhibit the adoption and seven factors that drive it. We structure these factors along with the diffusion of innovation framework that helps to disentangle drivers and inhibitors. As a result, we provide an initial explanation of the adoption of low code development platforms. Nevertheless, we conclude that existing research on the adoption of low code development platforms is not specific enough to understand the phenomenon substantially. Further, for some factors (e.g., cost), there is a disagreement in the academic literature on whether they are drivers or inhibitors. Hence, we identify gaps and derive avenues for future research.}, language = {en} } @inproceedings{BaumannSchlangen, author = {Baumann, Timo and Schlangen, David}, title = {The INPROTK 2012 release}, series = {Sprachkommunikation 2012 : Beitr{\"a}ge zur 10. ITG-Fachtagung vom 26. bis 28. September 2012 in Braunschweig}, booktitle = {Sprachkommunikation 2012 : Beitr{\"a}ge zur 10. ITG-Fachtagung vom 26. bis 28. September 2012 in Braunschweig}, editor = {Fingscheidt, T.}, publisher = {VDE-Verl}, address = {Berlin ; Offenbach}, isbn = {978-3-8007-3455-9}, pages = {147 -- 150}, abstract = {We describe the 2012 release of INPROTK1, our "Incremental Processing Toolkit" which combines a powerful and extensible architecture for incremental processing with components for incremental speech recognition and, new to this release, incremental speech synthesis. These components work domainindependently; we also provide example implementations of higher-level components such as natural language understanding and dialogue management that are somewhat more tied to a particular domain. The toolkit is accompanied by evaluation tools for analysing timing behaviour, and we highlight some timing results on conversational speech input in this paper. We offer our toolkit to foster research in this new and exciting area, which promises to help increase the naturalness of behaviours that can be modelled in such systems.}, language = {en} } @inproceedings{TrostTerbrackClausetal., author = {Trost, Marco and Terbrack, Hajo and Claus, Thorsten and Herrmann, Frank}, title = {Established production planning and control and its enhancement with sustainability}, series = {Proceedings of the 37th ECMS International Conference on Modeling and Simulation (ECMS 2023): June 20th - June 23rd, 2023, Florence, Italy}, booktitle = {Proceedings of the 37th ECMS International Conference on Modeling and Simulation (ECMS 2023): June 20th - June 23rd, 2023, Florence, Italy}, publisher = {ECMS}, isbn = {978-3-937436-80-7}, issn = {2522-2422}, doi = {10.7148/2023-0320}, pages = {320 -- 327}, abstract = {Against the background of the energy crisis, shortage of skilled workers, demographic change and other drivers, sustainable development is also becoming increasingly important for industrial companies. In this respect, production planning and control has an enormous influence on relevant objectives. In classical approaches of production planning and control as presented in this paper, economic-oriented objectives are taken into account to a large extent in decision making. This paper demonstrates that besides these classical models, a variety of approaches exist to influence ecological and social targets through production planning. These different models are assigned to sustainability areas and outlined by exemplary literature sources. Further research is needed, for instance, in the joint consideration of sustainability criteria along different planning levels and sustainable dimensions.}, language = {en} } @inproceedings{DuennweberGorlatchParlavantzasetal., author = {D{\"u}nnweber, Jan and Gorlatch, Sergei and Parlavantzas, Nikos and Baude, Francoise and Legrand, Virginie}, title = {Towards automatic creation of web services for grid component composition}, series = {Integrated Research in GRID Computing : CoreGRID Integration Workshop 2005 (Selected Papers), November 28-30, Pisa, Italy}, booktitle = {Integrated Research in GRID Computing : CoreGRID Integration Workshop 2005 (Selected Papers), November 28-30, Pisa, Italy}, publisher = {Springer Science+Business Media}, address = {Boston, MA}, isbn = {978-0-387-47658-2}, doi = {10.1007/978-0-387-47658-2_3}, pages = {31 -- 42}, abstract = {While high-level software components simplify the programming of grid applications and Web services increase their interoperability, developing such components and configuring the interconnecting services is a demanding task. In this paper, we consider the combination of Higher-Order Components (HOCs) with the Fractal component model and the ProActive library. HOCs are parallel programming components, made accessible on the grid via Web services that use a special class loader enabling code mobility: executable code can be uploaded to a HOC, allowing one to customize the HOC. Fractal simplifies the composition of components and the ProActive library offers a generator for automatically creating Web services from components composed with Fractal, as long as all the parameters of these services have primitive types. Taking all the advantages of HOCs, ProActive and Fractal together, the obvious conclusion is that composing HOCs using Fractal and automatically exposing them as Web services on the grid via ProActive minimizes the required efforts for building complex grid systems. In this context, we solved the problem of exchanging code-carrying parameters in automatically generated Web services by integrating the HOC class loading mechanism into the ProActive library.}, language = {en} } @article{BarannykFrikelNguyen, author = {Barannyk, Lyudmyla L. and Frikel, J{\"u}rgen and Nguyen, Linh V.}, title = {On artifacts in limited data spherical Radon transform: Curved observation surface}, series = {Inverse Problems}, volume = {32}, journal = {Inverse Problems}, number = {1}, publisher = {Institute of Physics}, address = {Bristol [u.a.]}, issn = {1361-6420}, doi = {10.1088/0266-5611/32/1/015012}, abstract = {We study the limited data problem of the spherical Radon transform in two and three-dimensional spaces with general acquisition surfaces. In such situations, it is known that the application of filtered-backprojection reconstruction formulas might generate added artifacts and degrade the quality of reconstructions. In this article, we explicitly analyze a family of such inversion formulas, depending on a smoothing function that vanishes to order k on the boundary of the acquisition surfaces. We show that the artifacts are k orders smoother than their generating singularity. Moreover, in two-dimensional space, if the generating singularity is conormal satisfying a generic condition then the artifacts are even k+1/2 orders smoother than the generating singularity. Our analysis for three-dimensional space contains an important idea of lifting up space. We also explore the theoretical findings in a series of numerical experiments. Our experiments show that a good choice of the smoothing function leads to a significant improvement of reconstruction quality.}, language = {de} } @article{HecknerSchworm, author = {Heckner, Markus and Schworm, Silke}, title = {The tagblog: Exploring social web user contribution to encourage students to actively engage in learning content}, series = {International Journal of Web Based Communities}, volume = {5}, journal = {International Journal of Web Based Communities}, number = {4}, publisher = {Inderscience Enterprises}, address = {Olney}, issn = {1741-8216}, doi = {10.1504/IJWBC.2009.028088}, pages = {528 -- 542}, abstract = {After leaving the lecture hall, students hardly reflect about the lesson's contents. To foster learning, the lesson content should be reorganised, elaborated and critically reflected. Tagging and blogging offer the opportunity to actively engage students in follow-up course work. This paper presents the results of a case study exploring the use of a social web application to encourage student contributions within the context of an undergraduate university seminar. The tagblog combines blogging, tagging and rating as three forms of online user contribution on Web 2.0 to develop a shared, emergent group knowledge repository. Blog posts, tags and comments are analysed to examine how user contributions reflect the active processing of learning content.}, language = {en} }