Publikationen

2017

• Robust controller design for lidar-based closed-loop wake redirection for wind farm control

  Raach, S., Boersma, S., van Wingerden, J.-W., Schlipf, D., & Cheng, P. W. (2017). Robust controller design for lidar-based closed-loop wake redirection for wind farm control. In World Congress of the International Federation of Automatic Control (Bd. 50, S. 4498–4503). Toulouse, France. http://doi.org/10.1016/j.ifacol.2017.08.380 (Original work published 2026)

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    • Schlipf, David

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  • 2017
  • Conference Paper
  • • Steffen Raach
    • Sjoerd Boersma
    • Jan-Willem van Wingerden
    • David Schlipf
    • Po Cheng

• Quality of Service Everywhere

  Uhl, T. (2017). Quality of Service Everywhere. In 9th International Conference on Advanced Service Computing (S. 3). Athens/Greece. (Original work published 2017)

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    • Uhl, Tadeus

  • Fachbereich

    • Fachbereich 3: Information und Kommunikation

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  • 2017
  • Conference Paper
  • • Tadeus Uhl

• Why do users install and delete Apps? A survey study

  Ickin, S., Petersen, K., & Gonzalez-Huerta, J. (2017). Why do users install and delete Apps? A survey study. In International Conference of Software Business (S. 186–191).

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    • Petersen, Kai

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    • FLAIR - Flensburg Artificial Intelligence Research

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  • 2017
  • Conference Paper
  • • Selim Ickin
    • Kai Petersen
    • Javier Gonzalez-Huerta

• A More Efficient 1-Checkable Secure Outsourcing Algorithm for Bilinear Maps.

  Kalkar, Ö., Kiraz, M. S., Sertkaya, I., & Uzunkol, O. (2017). A More Efficient 1-Checkable Secure Outsourcing Algorithm for Bilinear Maps. In Information Security Theory and Practice - 11th IFIP WG 11.2 International Conference, WISTP 2017, Heraklion, Crete, Greece, September 28-29, 2017, Proceedings (S. 155–164,). http://doi.org/10.1007/978-3-319-93524-9_10

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    • Uzunkol, Osmanbey

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    • Fachbereich 3: Information und Kommunikation

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  • 2017
  • Conference Paper
  • • Öznur Kalkar
    • Mehmet Kiraz
    • Isa Sertkaya
    • Osmanbey Uzunkol

• TouchScope: A Hybrid Multitouch Oscilloscope Interface

  Heinz, M., Bertel, S., & Echtler, F. (2017). TouchScope: A Hybrid Multitouch Oscilloscope Interface. In Proceedings of the 19th ACM International Conference on Multimodal Interaction (S. 269–273). New York, NY, USA: Association for Computing Machinery. http://doi.org/10.1145/3136755.3136765

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  We present TouchScope, a hybrid multitouch interface for common off-the-shelf oscilloscopes. Oscilloscopes are a valuable tool for analyzing and debugging electronic circuits, but are also complex scientific instruments. Novices are faced with a seemingly overwhelming array of knobs and buttons, and usually require lengthy training before being able to use these devices productively. In this paper, we present our implementation of TouchScope which uses a multitouch tablet in combination with an unmodified off-the-shelf oscilloscope to provide a novice-friendly hybrid interface, combining both the low entry barrier of a touch-based interface and the high degrees of freedom of a conventional button-based interface. Our evaluation with 29 inexperienced participants shows a comparable performance to traditional learning materials as well as a significantly higher level of perceived usability.

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    • Bertel, Sven

  • Abteilung/Einrichtung

    • CIVU – Center for Interaction, Visualization and Usability

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    • Fachbereich 3: Information und Kommunikation

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  • 2017
  • Conference Paper
  • • Matthew Heinz
    • Sven Bertel
    • Florian Echtler
  • • learning
    • tangible
    • multitouch
    • touchscreen
    • Oscilloscope
    • complex interface

• Regression testing goals-view of practitioners and researchers

  Minhas, N. M., Petersen, K., Bin Ali, N., & Wnuk, K. (2017). Regression testing goals-view of practitioners and researchers. In 2017 24th Asia-Pacific Software Engineering Conference Workshops (APSECW) (S. 25–31).

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    • Petersen, Kai

  • Abteilung/Einrichtung

    • FLAIR - Flensburg Artificial Intelligence Research

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  • 2017
  • Conference Paper
  • • Nasir Minhas
    • Kai Petersen
    • Nauman Bin Ali
    • Krzysztof Wnuk

• Low Cost Rapid Acquisition of Bidirectional Texture Functions for Fabrics

  Azari, B., Wüthrich, C. A., & Bertel, S. (2017). Low Cost Rapid Acquisition of Bidirectional Texture Functions for Fabrics. In 25th International Conference in Central Europe on Computer Graphics, Visualization and Computer Vision (WSCG 2017). Plzen, Czech Republic.

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  Creating photo realistic images from real word complex materials is a great challenge: the reflectance function of materials, especially fabrics, has glossy or specular highlights, reflectance anisotropy and retroreflections. This increases greatly the complexity of rendering. Bidirectional Texture Functions (BTFs), i.e. 2D textures acquired under varying illumination and viewing directions, have been used to render complex materials. However, the acquisition of textures for BTF requires up to now expensive setups and the measurement process is very timeconsuming as the directional dependent parameters (lighting and viewing directions) have to be controlled accurately. This paper will present in detail a new low cost programmable device for the rapid acquisition of BTF datasets. The device allows to acquire BTF databases at a fraction of the cost of available setups, and allows to experiment when a texture resolution and sample density increase in the parameter space is not perceivable by an observer of the renderings. The paper proves that using smaller resolution textures and decreasing the samples in parameter space does not lead to a loss of picture quality.

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    • Bertel, Sven

  • Abteilung/Einrichtung

    • CIVU – Center for Interaction, Visualization and Usability

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    • Fachbereich 3: Information und Kommunikation

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  • 2017
  • Conference Paper
  • • Banafsheh Azari
    • Charles Wüthrich
    • Sven Bertel

• Demonstrating TouchScope: A Hybrid Multitouch Oscilloscope Interface

  Heinz, M., Bertel, S., & Echtler, F. (2017). Demonstrating TouchScope: A Hybrid Multitouch Oscilloscope Interface. In Proceedings of the 19th ACM International Conference on Multimodal Interaction (S. 501). New York, NY, USA: Association for Computing Machinery. http://doi.org/10.1145/3136755.3143026

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  We present TouchScope, a hybrid multitouch interface for common off-the-shelf oscilloscopes. Oscilloscopes are a valuable tool for analyzing and debugging electronic circuits, but are also complex scientific instruments. Novices are faced with a seemingly overwhelming array of knobs and buttons, and usually require lengthy training before being able to use these devices productively. TouchScope uses a multitouch tablet in combination with an unmodified off-the-shelf oscilloscope to provide a novice-friendly hybrid interface, combining both the low entry barrier of a touch-based interface and the high degrees of freedom of a conventional button-based interface.

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    • Bertel, Sven

  • Abteilung/Einrichtung

    • CIVU – Center for Interaction, Visualization and Usability

  • Fachbereich

    • Fachbereich 3: Information und Kommunikation

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  • 2017
  • Conference Paper
  • • Matthew Heinz
    • Sven Bertel
    • Florian Echtler
  • • learning
    • touchscreen
    • Oscilloscope
    • multitouch
    • complex interface
    • tangible

• Spatial Knowledge Acquired from Pedestrian Urban Navigation Systems

  Bertel, S., Dressel, T., Kohlberg, T., & von Jan, V. (2017). Spatial Knowledge Acquired from Pedestrian Urban Navigation Systems. In Proceedings of the 19th International Conference on Human-Computer Interaction with Mobile Devices and Services. New York, NY, USA: Association for Computing Machinery. http://doi.org/10.1145/3098279.3098543

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  We investigated the spatial knowledge that users of pedestrian navigation support acquire about the navigated area. In particular, we compare two conditions: A spatially richer condition, which provides continual access to information about route directions and surroundings via a local map at closest zoom level. And a spatially sparser condition, in which route directions are given via a tactile display and only as decision points come up. In a field study, 28 participants navigated on foot through a previously unfamiliar urban area. Data on resulting spatial knowledge, gaze distribution on environmental features, performance, individual spatial abilities, and user experience were collected and analysed. We were specifically interested in the route and survey knowledge that participants had acquired. The results point to advantages for acquiring route knowledge through using the sparser, tactile display condition and for acquiring survey knowledge through using the richer map condition. We conclude with discussing ramifications for the design and use of different types of pedestrian navigation support systems for different task scenarios.

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    • Bertel, Sven

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    • CIVU – Center for Interaction, Visualization and Usability

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    • Fachbereich 3: Information und Kommunikation

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  • 2017
  • Conference Paper
  • • Sven Bertel
    • Thomas Dressel
    • Tom Kohlberg
    • Vanessa von Jan
  • • wayfinding
    • navigation
    • user study
    • tactile interface
    • gaze data
    • mobile device
    • spatial knowledge

• Study on the total harmonic distortion of a 5-MW wind turbine with modular multilevel converter and development of a demonstrator

  Fey, J.-H., Hinrichsen, F., & Mallwitz, R. (2017). Study on the total harmonic distortion of a 5-MW wind turbine with modular multilevel converter and development of a demonstrator. In NEIS 2017; Conference on Sustainable Energy Supply and Energy Storage Systems (S. 1–5). Hamburg, Germany: Detlef Schulz.

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  This paper investigates the possibility of applying medium-voltage modular multilevel converters in 5-MW onshore wind turbines. The focus is on the reduction of higher order harmonics in comparison to classical 3-level medium-voltage converters. The simulation of the 7-level 5-MW converter shows that the harmonic limits in accordance with the actual grid codes can be met without an additional grid side filter. The paper starts with a description of the detailed grid and converter model parameters, followed by the grid compatibility simulation according to the standard grid codes. Subsequently, a setup of a 3-kV 350-kVA MMC demonstrator with commonly used low-voltage components is presented which will afterwards serve to verify the simulation results.

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  • Profilbereich

    • Erneuerbare Energien und nachhaltige Entwicklung

  • Forschungsfeld

    • Wind

  • Fachbereich

    • Fachbereich 2: Energy and Life Science

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  • 2017
  • Conference Paper
  • • Jan-Henrik Fey
    • Frank Hinrichsen
    • Regine Mallwitz