Publikationen

2021

• Long-term thermal imbalance in large borehole heat exchangers array - A numerical study based on the Leicester project

  Chen, S., Cai, W., Witte, F., Wang, X., Wang, F., Kolditz, O., & Shao, H. (2021). Long-term thermal imbalance in large borehole heat exchangers array - A numerical study based on the Leicester project. Energy And Buildings, 231, 110518. http://doi.org/10.1016/j.enbuild.2020.110518 (Original work published jan)

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    • Witte, Francesco

  • Fachbereich

    • Fachbereich 2: Energy and Life Science

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  • 2021
  • Journal Article
  • • Shuang Chen
    • Wanlong Cai
    • Francesco Witte
    • Xuerui Wang
    • Fenghao Wang
    • Olaf Kolditz
    • Haibing Shao

• Parameterization of wind evolution using lidar

  Chen, Y., Schlipf, D., & Cheng, P. W. (2021). Parameterization of wind evolution using lidar. Wind Energy Science, 6, 61-91. http://doi.org/10.5194/wes-6-61-2021 (Original work published jan)

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    • Schlipf, David

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  • 2021
  • Journal Article
  • • Yiyin Chen
    • David Schlipf
    • Po Cheng

• Realization of wind field reconstruction for real- time monitoring and LIDAR-assisted control

  Schlipf, D., Lemmer, F., & Thomas, F. (2021). Realization of wind field reconstruction for real- time monitoring and LIDAR-assisted control. http://doi.org/10.5281/zenodo.5608684 (Original work published aug)

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    • Schlipf, David

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  • 2021
  • Miscellaneous
  • • David Schlipf
    • Frank Lemmer
    • Florian Thomas

• Fast Reinjection for Intermittent MPTCP Connections

  Lübben, R., Gübner, S., & Wette, P. (2021). Fast Reinjection for Intermittent MPTCP Connections. In Proc. IEEE VTC. (Original work published April)

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    • Lübben, Ralf

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    • Fachbereich 4: Wirtschaft

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  • 2021
  • Conference Paper
  • • Ralf Lübben
    • Sascha Gübner
    • Philip Wette

• RTTPROBS: A RTT Probing Scheme for RTT Aware Multi-path Scheduling

  Lübben, R., Wette, P., & Gübner, S. (2021). RTTPROBS: A RTT Probing Scheme for RTT Aware Multi-path Scheduling. In . (Original work published apr)

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    • Lübben, Ralf

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  • 2021
  • Conference Paper
  • • Ralf Lübben
    • Philip Wette
    • Sascha Gübner

• A Spectral Model of Grid Frequency for Assessing the Impact of Inertia Response on Wind Turbine Dynamics

  Guo, F., & Schlipf, D. (2021). A Spectral Model of Grid Frequency for Assessing the Impact of Inertia Response on Wind Turbine Dynamics. Energies, 14. http://doi.org/10.3390/en14092492 (Original work published apr)

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    • Schlipf, David

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  • 2021
  • Journal Article
  • • Feng Guo
    • David Schlipf

• Teilwicklungsanlauf von Käfigläufermotoren mit kombinierter Stern-Dreieck-Wicklung

  Huth, G., & Löhlein, B. (2021). Teilwicklungsanlauf von Käfigläufermotoren mit kombinierter Stern-Dreieck-Wicklung. http://doi.org/10.1007/s00502-021-00900-6 (Original work published 2021/07/12)

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  Mit Rücksicht auf die Netzverhältnisse müssen Käfigläufermotoren mit einem geeigneten Anlaufverfahren an das Drehstromnetz geschaltet werden. Liegen, wie zum Beispiel bei Kompressoren, schwere Anlaufbedingungen vor, so kommt neben dem verstärkten Stern-Dreieck-Anlauf häufig der Teilwicklungsanlauf zum Einsatz. Wenn zur Steigerung der Energieeffizienz eine kombinierte Stern-Dreieck-Wicklung zum Einsatz kommt, bietet sich die Drehfeldwicklung zusätzlich auch für den Teilwicklungsanlauf an, wenn die kombinierte Wicklung als Parallelschaltung ausgeführt ist. Die Möglichkeiten hierzu werden unter Berücksichtigung des Oberfeldverhaltens analysiert und am Beispiel von zwei Käfigläufermotoren wird das Betriebsverhalten simulativ untersucht.

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  • 2021
  • Journal Article
  • • Gerhard Huth
    • Bernd Löhlein

• The impact of entrepreneurship on economic, social and environmental welfare and its determinants: a systematic review

  Neumann, T. (2021). The impact of entrepreneurship on economic, social and environmental welfare and its determinants: a systematic review, 71(3), 553-584, . http://doi.org/10.1007/s11301-020-00193-7 (Original work published 2021/07/01)

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  This paper presents a systematic review of (a) the impact of entrepreneurship on economic, social and environmental welfare and (b) the factors determining this impact. Research over the past 25 years shows that entrepreneurship is one cause of macroeconomic development, but that the relationship between entrepreneurship and welfare is very complex. The literature emphasizes that the generally positive impact of entrepreneurship depends on a variety of associated determinants which affect the degree of this impact. This paper seeks to contribute to the literature in three ways. First, it updates and extends existing literature reviews with the recently emerged research stream on developing countries, and incorporates studies analysing not only the impact of entrepreneurship on economic growth and welfare but also on social and environmental welfare. Second, it identifies and structures the current knowledge on the determinants of this impact. And third, it provides a roadmap for future research which targets the shortcomings of the existing empirical literature on this topic. The review of 102 publications reveals that the literature generally lacks research which (a) goes beyond the common measures of economic welfare, (b) examines the long-term impact of entrepreneurship and (c) focuses on emerging and developing countries. Regarding the determinants of the impact of entrepreneurship, the results highlight the need for empirical research which addresses both already investigated determinants which require more attention (e.g. survival, internationalisation, qualifications) and those which are currently only suspected of shaping the impact of entrepreneurship (e.g. firm performance, the entrepreneur’s socio-cultural background and motivations).

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  • 2021
  • Journal Article
  • • Thomas Neumann

• A Key Manipulation Attack on Some Recent Isogeny-Based Key Agreement Protocols

  Gönen, M. E., Tutdere, S., & Uzunkol, O. (2021). A Key Manipulation Attack on Some Recent Isogeny-Based Key Agreement Protocols. Bulletin Of The Iranian Mathematical Society . http://doi.org/10.1007/s41980-021-00534-6 (Original work published 2021/02/27)

  Abstract

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  Recently, Daghigh et al. proposed some isogeny-based key agreement protocols in Bull. Iran. Math. Soc. 43 (2017), no. 4, 77-88. They claimed that their key exchange protocols based on supersingular isogenies provide the same security level as the Jao et al.’s protocol SIDH. This paper addresses first a vulnerability of these protocols to a key manipulation attack. Hence, unlike the security claims of Daghigh et al., these protocols unfortunately do not provide the same security when compared with SIDH. Second, we show in particular that the secret dual isogenies of the protocols can easily be retrieved by applying our key manipulation attack. We also discuss lastly the countermeasures to this attack.

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    • Uzunkol, Osmanbey

  • Fachbereich

    • Fachbereich 3: Information und Kommunikation

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  • 2021
  • Journal Article
  • • Mehmet Gönen
    • Seher Tutdere
    • Osmanbey Uzunkol

• Akademische (Weiter-)Bildung im Learning Hub

  Bartscher, T., & Nissen, R. (2021). Akademische (Weiter-)Bildung im Learning Hub. Deggendorf/Flensburg: i:ad-Studie 2021. (Original work published 2021)

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    • Bartscher, Thomas

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    • Fachbereich 4: Wirtschaft

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  • 2021
  • Report
  • • Thomas Bartscher
    • Regina Nissen