# This BibTeX File has been generated by # the Typo3 extension 'Sixpack-4-T3 by Sixten Boeck' # # URL: # Date: 08/19/2017 # Non-Standard BibTex fields are included. # state: 0 = published, 1 = accepted, 2 = submitted, 3 = to be published // if missing, published is assumed # extern,deleted,hidden: 0 = false, 1 = true // if missing, false is assumed # link format: Title Url // separated by a whitespace @conference{richly2016where, author = { Keven Richly,Ralf Teusner }, title = { Where is the Money Made? An Interactive Visualization of Profitable Areas in New York City }, year = { 2016 }, abstract = { Detailed information about the flow of potential customers in a city is extremely relevant for strategic decisions of various service providers such as taxi companies or advertising agencies. The knowledge about highly frequented regions as well as peak times in specific areas provides a crucial business advantage to competitors. Today, business relevant decisions about the positioning of service providers and advertising spaces or the balancing of capacity are primarily based on experience only. In this paper, we present a novel approach to gain knowledge about the distribution of potential customers over time and space based on the data of taxi rides, which have been recorded for documentation purposes. By leveraging the performance of in-memory databases, we build an applica- tion, which allows the user to analyze about 700 million taxi rides in real-time. The application allows companies to get an impression in which areas and in what timeframes they can reach a large audience of potential customers. Additionally, we demonstrate that the developed visualization concept enables the comparison of different regions and allows to analyze trends in the customer flow over time. }, booktitle = { The 2nd EAI International Conference on IoT in Urban Space (Urb-IoT) }, sorting = { 8448 } } @conference{Thomas2015a, author = { Thomas Kowark,Ralf Teusner,Keven Richly,Hasso Plattner }, title = { RepMine: A System for Transferrable Analyses of Collaboration Activities in Software Engineering }, year = { 2015 }, month = { 11 }, booktitle = { 2015 Workshop on Software Support for Collaborative and Global Software Engineering, In conjunction with the 30th IEEE/ACM International Conference on Automated Software Engineering }, sorting = { 18432 } } @conference{Ralf2015a, author = { Ralf Teusner,Keven Richly,Thomas Staubitz,Jan Renz }, title = { Enhancing Content between Iterations of a MOOC – Effects on Key Metrics }, journal = { EMOOCs 2015: European MOOCs Stakeholder Summit }, year = { 2015 }, volume = { 1 }, number = { 1 }, pages = { 147-156 }, month = { 5 }, abstract = { This paper presents our findings of a comparison study conducted on three iterations of a MOOC run on our platform openHPI. We present the main facts shared by the courses and the planned as well as occurred differences. Additionally, we discuss the added technical features such as user groups along with the expected and actual outcomes. We relate our experiences from the second and third iteration to those of the first one. Findings show that demand for high quality content endures, even if the topic is rather specialized. Expectations of participants towards online courses are growing in general due to an increasing amount of organizations offering lectures. MOOCs are compared to school lessons, distance education and seminars. As a result, the pressure on platforms is increasing with regards to content, service and reliability. To cope with that, we share best practices and propose promising improvements to the platform and future courses. }, keywords = { Iterations MOOCs }, url = { www.emoocs2015.eu/sites/default/files/Papers.pdf }, booktitle = { EMOOCs 2015: Third European MOOCs Stakeholder Summit }, sorting = { 17920 } } @conference{Keven2015a, author = { Keven Richly,Ralf Teusner,Alexander Immer,Fabian Windheuser,Lennard Wolf }, title = { Optimizing Routes of Public Transportation Systems by Analyzing the Data of Taxi Rides }, year = { 2015 }, booktitle = { Workshop on Smart Cities and Urban Analytics, in conjunction with 23rd ACM International Conference on Advances in Geographic Information Systems (ACM SIGSPATIAL) }, sorting = { 17152 } } @conference{Ralf2014a, author = { Ralf Teusner, Michael Perscheid, Malte Appeltauer, Jonas Enderlein, Thomas Klingbeil, Michael Kusber }, title = { PopulAid: In-Memory Data Generation for Customized Benchmarks }, year = { 2014 }, booktitle = { Workshop on Big Data Benchmarking (WBDB) }, sorting = { 77312 } } @conference{Franka2013a, author = { Franka Grünewald,Elnaz Mazandarani,Christoph Meinel,Ralf Teusner,Michael Totschnig,Christian Willems }, title = { openHPI: Soziales und Praktisches Lernen im Kontext eines MOOC }, year = { 2013 }, booktitle = { in Proceedings of DeLFI 2013 - 11. e-Learning Fachtagung Informatik }, sorting = { 75776 } } @conference{Ralf2013a, author = { Ralf Teusner,Gregor Gabrysiak,Stefan Richter,Stefan Kleff }, title = { Interactive Strategy-Based Validation of Behavioral Models }, year = { 2013 }, booktitle = { GTVMT }, sorting = { 88320 } } @conference{Franka2013a, author = { Franka Grünewald,Elnaz Mazandarani,Christoph Meinel,Ralf Teusner,Michael Totschnig,Christian Willems }, title = { openHPI - a Case-Study on the Emergence of two Learning Communities }, year = { 2013 }, booktitle = { EDUCON }, sorting = { 83712 } } @inproceedings{Ralf2017a, author = { Ralf Teusner, Christoph Matthies, Philipp Giese }, title = { Should I Bug You? Identifying Domain Experts in Software Projects Using Code Complexity Metrics }, journal = { QRS }, year = { 2017 }, pages = { 8 }, abstract = { In any sufficiently complex software system there are experts, having a deeper understanding of parts of the system than others. However, it is not always clear who these experts are and which particular parts of the system they can provide help with. We propose a framework to elicit the expertise of developers and recommend experts by analyzing complexity measures over time. Furthermore, teams can detect those parts of the software for which currently no, or only few experts exist and take preventive actions to keep the collective code knowledge and ownership high. We employed the developed approach at a medium-sized company. The results were evaluated with a survey, comparing the perceived and the computed expertise of developers. We show that aggregated code metrics can be used to identify experts for different software components. The identified experts were rated as acceptable candidates by developers in over 90% of all cases. }, sorting = { 512 }, state = { 1 } } @inproceedings{2016_Staubitz_DelFI, author = { Thomas Staubitz, Ralf Teusner, Jan Renz, Christoph Meinel }, title = { Automatisierte Online-Aufsicht im Kontext der Wertigkeit von Zertifikaten einer MOOC Plattform }, journal = { DeLFI 2016 - Die 14. E-Learning Fachtagung Informatik, 11.-14. September 2016, Potsdam }, year = { 2016 }, pages = { 125--136 }, month = { 12 }, abstract = { Die Glaubwürdigkeit und Überprüfbarkeit der Zertifikate ist ein wesentlicher Bestandteil von jeglicher Form von zertifiziertem Training. Diese Aussage gilt natürlich auch für MOOCs. In diesem Kontext kommt allerdings erschwerend hinzu, dass eine individuelle, persönliche Beaufsichtigung der Prüfungen tausender TeilnehmerInnen offline nur schwer zu realisieren ist. Es wird daher eine Technik benötigt, diese Beaufsichtigung online durchzuführen, um die Vertrauenswürdigkeit oder Wertigkeit dieser Zertifikate zu erhöhen. In dieser Studie vergleichen wir verschiedene Spielarten der Online-Aufsicht. Wir stellen die Ergebnisse einiger Umfragen unter unseren TeilnehmerInnen, die sich mit deren Sicht bezüglich der Wertigkeit der Zertifikate befassen, vor und bewerten die Aussagen in unserem Kontext. Schließlich stellen wir ein Experiment vor, das wir mit einer neuen Variante der Online-Aufsicht durchgeführt haben. Anstatt sich auf menschliche Augen zu verlassen, wird ein automatisierter Abgleich des Gesichts vor der Kamera mit einem hinterlegten Bild durchgeführt, um zu überprüfen ob die angemeldete TeilnehmerIn auch die ist, die die Prüfung ablegt. }, keywords = { Web University }, files = { fileadmin/user_upload/fachgebiete/meinel/papers/2016_Staubitz_DelFI.pdf }, link1 = { http://subs.emis.de/LNI/Proceedings/Proceedings262/article9.html }, sorting = { 1792 } } @inproceedings{2016_Staubitz_Emoocs, author = { Thomas Staubitz, Ralf Teusner, Jan Renz, Christoph Meinel }, title = { First Steps in Automated Proctoring }, year = { 2016 }, booktitle = { Proceedings of the Fourth MOOC European Stakeholders Summit (EMOOCs 2016) }, organization = { P.A.U }, project = { Web University }, sorting = { 20224 }, state = { 1 } } @inproceedings{2016_Staubitz_Educon, author = { Thomas Staubitz, Hauke Klement, Ralf Teusner, Jan Renz, Christoph Meinel }, title = { CodeOcean - A Versatile Platform for Practical Programming Excercises in Online Environments }, year = { 2016 }, publisher = { IEEE }, booktitle = { Proceedings of IEEE Global Engineering Education Conference (EDUCON2016) }, project = { Web University }, files = { fileadmin/user_upload/fachgebiete/meinel/papers/Web-University/2016_Staubitz_EDUCON.pdf }, sorting = { 20736 }, state = { 1 } } @inproceedings{2016_Staubitz_KES-SEEL, author = { Thomas Staubitz, Maximilian Brehm, Johannes Jasper, Thomas Werkmeister, Ralf Teusner, Christian Willems, Jan Renz, and Christoph Meinel }, title = { Vagrant Virtual Machines for Hands-On Exercises in Massive Open Online Courses }, journal = { Smart Education and e-Learning 2016 }, year = { 2016 }, pages = { 363--373 }, abstract = { In many MOOCs hands-on exercises are a key component. Their format must be deliberately planned to satisfy the needs of a more and more heterogeneous student body. At the same time, costs have to be kept low for maintenance and support on the course provider’s side. The paper at hand reports about our experiments with a tool called Vagrant in this context. It has been successfully employed for use cases similar to ours and thus promises to be an option for achieving our goals. }, keywords = { Web University }, publisher = { Springer International Publishing }, files = { fileadmin/user_upload/fachgebiete/meinel/papers/2016_Staubitz_KES-SEEL.pdf }, isbn = { 978-3-319-39690-3 }, doi = { 10.1007/978-3-319-39690-3_32" }, link1 = { http://dx.doi.org/10.1007/978-3-319-39690-3_32 }, sorting = { 2048 } } @inproceedings{2016_Staubitz_TALE, author = { Thomas Staubitz, Ralf Teusner, Nishanth Prakash, Christoph Meinel }, title = { Cellular Automata as Basis for Programming Exercises in a MOOC on Testdriven Development }, journal = { IEEE International Conference on Teaching, Assessment, and Learning for Engineering (TALE2016) }, year = { 2016 }, abstract = { Programming tasks are an important part of teaching computer programming as they foster students to develop essential programming skills and techniques through practice. The design of educational problems plays a crucial role in the extent to which the experiential knowledge is imparted to the learner both in terms of quality and quantity. Badly designed tasks have been known to put-off students from practicing programming. Hence, there is a need for carefully designed problems. Cellular Automata programming lends itself as a very suitable candidate among problems designed for programming practice. In this paper we describe how various types of problems can be designed using concepts from Cellular Automata and discuss the features which make them good practice problems with regard to instructional pedagogy. We also present a case study on a Cellular Automata programming exercise used in a MOOC on Test Driven Development using JUnit, and discuss the automated evaluation of code submissions and the feedback about the reception of this exercise by participants in this course. }, keywords = { Web University }, publisher = { IEEE }, files = { fileadmin/user_upload/fachgebiete/meinel/papers/2016_Staubitz_TALE.pdf }, sorting = { 1536 } } @inproceedings{2015_Staubitz_TALE, author = { Thomas Staubitz, Hauke Klement, Jan Renz, Ralf Teusner, Christoph Meinel }, title = { Towards Practical Programming Exercises and Automated Assessment in Massive Open Online Courses }, year = { 2015 }, publisher = { IEEE }, address = { Zhuhai, China }, booktitle = { Proceedings of the IEEE International Conference on Teaching, Assessment, and Learning for Engineering (TALE2015) }, project = { Web University }, files = { fileadmin/user_upload/fachgebiete/meinel/papers/Web-University/2015_Staubitz_TALE.pdf }, sorting = { 22272 } } @inproceedings{2015_Teusner_EMOOCS, author = { Ralf Teusner, Keven Richly, Thomas Staubitz, Jan Renz }, title = { Enhancing Content between Iterations of a MOOC }, year = { 2015 }, pages = { 147-156 }, publisher = { P.A.U }, address = { Louvain, Belgium }, booktitle = { Proceedings of the Third European Stakeholders Summit }, project = { Web University }, sorting = { 22528 } } @inproceedings{2015_LOWIS_FIE, author = { Martin v. Löwis, Thomas Staubitz, Ralf Teusner, Jan Renz, Susanne Tannert, Christoph Meinel }, title = { Scaling Youth Development Training in IT Using an xMOOC Platform }, year = { 2015 }, publisher = { IEEE }, address = { El Paso, TX, USA }, booktitle = { Proceedings of the IEEE Frontiers in Education }, project = { Web University }, files = { fileadmin/user_upload/fachgebiete/meinel/papers/Web-University/2015_Loewis_FiE.pdf }, doi = { 10.1109/FIE.2015.7344145 }, sorting = { 22784 } } @inproceedings{Franziska2014a, author = { Franziska Häger,Ralf Teusner }, title = { From theory to practice - Using a multi-team design thinking workshop to kickstart software projects }, year = { 2014 }, booktitle = { Workshop on Design Thinking in Business Information Systems (DTBIS) }, sorting = { 77056 } } @inproceedings{TGR+13---InteractiveStrategyBasedValidation, author = { Ralf Teusner and Gregor Gabrysiak and Stefan Richter and Stefan Kleff }, title = { Interactive Strategy-Based Validation of Behavioral Models }, year = { 2013 }, month = { 3 }, booktitle = { Proc. of the 12th International Workshop on Graph Transformation and Visual Modeling Techniques (GT-VMT'13) }, sorting = { 768 }, state = { 1 } } @inproceedings{2013_Gruenewald_EDUCON, author = { Franka Grünewald, Elnaz Mazandarani, Christoph Meinel, Ralf Teusner, Michael Totschnig, Christian Willems }, title = { openHPI - a Case-Study on the Emergence of two Learning Communities }, year = { 2013 }, month = { 3 }, abstract = { Recently a new format of online education has emerged that combines video lectures, interactive quizzes and social learning into an event that aspires to attract a massive number of participants. This format, referred to as Massive Open Online Course (MOOC), has garnered considerable public attention, and has been invested with great hopes (and fears) of transforming higher education by opening up the walls of closed institutions to a world-wide audience. In this paper, we present two MOOCs that were hosted at the same platform, and have implemented the same learning design. Due to their difference in language, topic domain and difficulty, the communities that they brought into existence were very different. We start by describing the MOOC format in more detail, and the distinguishing features of openHPI. We then discuss the literature on communities of practice and cultures of participation. After some statistical data about the first openHPI course, we present our qualitative observations about both courses, and conclude by giving an outlook on an ongoing comparative analysis of the two courses. }, keywords = { online course; learner community; community of practice; culture of participation }, url = { fileadmin/user_upload/fachgebiete/meinel/papers/Web-University/2013_Gruenewald_EDUCON.pdf }, publisher = { IEEE Press }, booktitle = { Proceedings of 2013 IEEE Global Engineering Education Conference (EDUCON) }, project = { Future Internet; Web University; Web 3.0; tele-TASK }, files = { fileadmin/user_upload/fachgebiete/meinel/papers/Web-University/2013_Gruenewald_EDUCON.pdf }, sorting = { 50688 } } @inproceedings{2013_Gruenewald_DELFI, author = { Franka Grünewald, Elnaz Mazandarani, Christoph Meinel, Ralf Teusner, Michael Totschnig, Christian Willems }, title = { openHPI: Soziales und Praktisches Lernen im Kontext eines MOOC }, year = { 2013 }, abstract = { Mit dem Format des "Masssive Open Online Courses" (MOOC) hat sich in den letzten Jahren eine intensiv diskutierte neue Variante des E-Learnings herausgebildet. Zentrale Voraussetzung eines MOOCs ist die Öffnung eines Kurses aus den Schranken einer Bildungsinstitution heraus hin zur kostenlosen und uneingeschränkten Teilnahme. Über die für ein MOOC angemessenen pädagogischen Methoden wird zur Zeit zwar heftig diskutiert, Konsens besteht allerdings darüber, dass die wichtigste Herausforderung darin besteht, Lernprozesse durch soziale Interaktionen zwischen potentiell Tausenden von Teilnehmern zu stimulieren. In unserem Beitrag stellen wir openHPI vor, eine Plattform für MOOCs im Bereich der Informationstechnologie. Anhand von Kolbs Theorie der Lernstile analysieren wir eine Umfrage unter den Teilnehmern des ersten deutschsprachigen Kurses "Internetworking", und zeigen, dass ein vorrangig am Format der Vorlesung orientiertes MOOC zwar eher dem an Begriffsbildung und Beobachtung orientierten assimilierenden Lernstil entgegenkommt, dass es uns durch die Einführung von praktischen Zusatzaufgaben jedoch auch gelang, das aktive Experimentieren der Teilnehmer mit der Materie zu fördern. Wir beschreiben auch, in welchem Ausmaß die Teilnehmer, Funktionen der Plattform, die das soziale Lernen ermöglichen, nutzen, und welche zusätzlichen Funktionen nachgefragt werden. Für die Neuauflage dieses Kurses, sowie des ersten, englischsprachigen Kurses zum Thema "In-Memory Databases" ıst eine intensivere Integration praktischer Aufgaben in das Kurs-Design geplant. Die didaktischen und technischen Herausforderungen, die sich daraus ergeben, werden im zweiten Teil des Textes analysiert. }, keywords = { MOOC, Lernstile, Theory of Practise, Cultures of Participation }, url = { file:52425 }, publisher = { Gesellschaft für Informatik }, address = { Bremen, Germany }, booktitle = { Proceedings of DeLFI 2013 - 11. e-Learning Fachtagung Informatik }, project = { Web University }, files = { fileadmin/user_upload/fachgebiete/meinel/papers/Web-University/2013_Gruenewald_DELFI.pdf }, sorting = { 49664 }, state = { 1 } } @masterthesis{Teusner11---SmarteSimulation, author = { Ralf Teusner }, title = { Smarte Simulation von virtuellen Prototypen }, year = { 2011 }, school = { Hasso Plattner Institute at the University of Potsdam }, project = { ma-theses-fg }, sorting = { 10240 } }