Publikationen

2021

• Grid Frequency Data – WETI

  Thiesen, H., Gloe, A., & Jauch, C. (2021). Grid Frequency Data – WETI. http://doi.org/doi.org/10.17605/OSF.IO/JBK82

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  The presented grid frequency data is part of research activities at the Wind Energy Technology Instiute (WETI) at the Flensburg University of Applied Sciences. The measurement campaign is conducted in Flensburg, Germany. Hence, the grid frequency of the synchronous area of Continental Europe is tracked. A Dewetron 2010 measurement system is used to record and compute the data. The measurement system computes the grid frequency by tracking the grid voltage with a high sampling rate of 50 kHz. Every 164 ms the software fits a sinusoidal curve into the recorded voltage measurement points using the least-square-sums approach. The period of the resulting sinusoidal function is used as a measure for grid frequency.

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  • Personenseiten

    • Thiesen, Henning
    • Gloe, Arne
    • Jauch, Clemens

  • Abteilung/Einrichtung

    • Wind Energy Technology Institute

  • Fachbereich

    • Fachbereich 2: Energy and Life Science

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  • 2021
  • Database
  • • Henning Thiesen
    • Arne Gloe
    • Prof. Dr. Clemens Jauch
  • • WETI

• Connectivity is key: holistic sustainability assessment and reporting from the perspective of food manufacturers

  Küchler, R., & Herzig, C. (2021). Connectivity is key: holistic sustainability assessment and reporting from the perspective of food manufacturers. British Food Journal. http://doi.org/10.1108/BFJ-03-2021-0317

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  As members of the food supply chain, food manufacturers acquire power and hold responsibility for the sustainable transformation of our food systems. Sustainability assessment and reporting frameworks function as instruments to shape sustainable transformation processes. Their suitability for food manufacturing companies and their connectivity with the up- and downstream food supply chain is investigated here. The first section of the study explores the need for holistic, company-based sustainability frameworks in the food manufacturing sector from the literature. The second part compares seven frameworks, in terms of content and supply chain connectivity. Food sector specificity demands the inclusion of topics specific to food systems. Furthermore, none of the investigated frameworks fulfils both food sector specificity and full connectivity with the up- and downstream supply chain. As a limitation to this work, comparison of the frameworks at topic-level instead of indicator-level is considered. The findings call for more harmonised and integrated sustainability assessment throughout the food supply chain. The framework a food manufacturer should apply depends on their motivation behind conducting the sustainability assessment and reporting. Evidence is provided from various perspectives and with regard to key issues such as content, certification and communication. No comparison between sustainability frameworks has been made yet from the supply chain perspective of food manufacturers.

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    • Fachbereich 2: Energy and Life Science

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  • 2021
  • Journal Article
  • • Rebekka Küchler
    • Christian Herzig

• Entrepreneurship Education als Beitrag zur Weiterung der Horizonte

  Ebbers, I. (2021). Entrepreneurship Education als Beitrag zur Weiterung der Horizonte.

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  [... Der Beitrag] verfolgt die Frage, wie eine Entrepreneurship Education, verstanden als Erziehung zum unternehmerisches Denken und Handeln, im Rahmen allgemein-bildender Beschulung und mit dem Ziel einer allgemeinbildenden Wirksamkeit so angelegt werden kann, dass sie einen Beitrag zur Horizontweitung der Lernenden leisten kann. Um diese Frage beantworten zu können, soll im weiteren Verlauf der Bildungsbegriff nach Klafki genutzt werden. Er bezieht sich hier im Wesentlichen auf vier Aufgaben der Bildung, welche im Folgenden vor dem Hintergrund der hier gemeinten Entrepreneurship Education genauer betrachtet werden sollen. (DIPF/Orig.).

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  • Abteilung/Einrichtung

    • Jackstädt-Zentrum Flensburg (JZF)

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  • 2021
  • Miscellaneous
  • • Ilona Ebbers

• Namibian State of Logistics 2020 Report

  Oelze, N., Simasiku, B. M., & Jackie, L. L. (2021). Namibian State of Logistics 2020 Report. Windhoek: Namibian-German Centre for Logistics. Abgerufen von https://www.giz.de/en/downloads/NGCL_Namibia-State-of-Logistics_Report2020-1.pdf

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  This document has been prepared to summarise the findings of a study carried out by the Namibian-German Centre for Logistics into the current state of logistics in Namibia during the period from 2018 to 2020 and the impact of the Covid-19 pandemic on the industry. It updates studies carried into Namibian logistics in 2012 and 2018. The study has been undertaken by the research team on an wholly independent basis making use of contemporary data available in the public domain and surveys conducted by the team. It reflects the opinions of the authors based of review and analysis of the available evidence.

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  • Fachbereich

    • Fachbereich 4: Wirtschaft

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  • 2021
  • Report
  • • Nelly Oelze
    • Brighten Simasiku
    • Lydia Jackie

• Capturing shrinkage and neck growth with phase field simulations of the solid state sintering.

  Ivannikov, V., Thomsen, F., Ebel, T., & Willumeit-Römer, R. (2021). Capturing shrinkage and neck growth with phase field simulations of the solid state sintering. Modelling And Simulation In Materials Science And Engineering, 29(7). http://doi.org/10.1088/1361-651X/ac1f87

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    • Thomsen, Fritz

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  • 2021
  • Journal Article
  • • Vladimir Ivannikov
    • Fritz Thomsen
    • Thomas Ebel
    • Regine Willumeit-Römer

• Spielwiese und Impulsgeber zugleich : wie Corporate Influencer die Organisation verändern

  Reimer, T., Heidenreich, M., & Herbert, O. (2021). Spielwiese und Impulsgeber zugleich : wie Corporate Influencer die Organisation verändern. Organisationsentwicklung : Zeitschrift für Unternehmensentwicklung und Change Management. Düsseldorf: Solutions by Handelsblatt Media Group GmbH.

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  • Abteilung/Einrichtung

    • Jackstädt-Zentrum Flensburg (JZF)

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  • 2021
  • Miscellaneous
  • • Tanja Reimer
    • Markus Heidenreich
    • Oliver Herbert

• Financial performance and firm efficiency of automotive manufacturers and their suppliers A longitudinal data envelopment analysis

  Brandenburg, M., & Hahn, G. J. (2021). Financial performance and firm efficiency of automotive manufacturers and their suppliers A longitudinal data envelopment analysis. Logistics Research, 14(1), 26. http://doi.org/10.23773/2021_01

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  A data envelopment analysis (DEA) is presented to assess evolutions of firm efficiency and financial performance in automotive supply chains. A sample of 32 decision-making units (DMUs), 17 globally operating original equipment manufacturers (OEMs) and 15 key suppliers from the automotive industry, is in focus of this analysis in which cost levels and capital requirements are put into relation to sales growth and profit. Cost of goods sold, operating capital, and net fixed assets represent the financial input of a company while sales growth and earnings before interest and taxes (EBIT) reflect the financial output. The financial performance of a firm is indicated by its efficiency, calculated by an input-oriented variable returns to scale model. A multiple linear regression analysis reveals which operational performance factors are predictors of financial performance. A longitudinal DEA approach that covers the years from 2003 to 2017 is chosen to reveal performance evolutions over time. In order to analyze the stability of relationships between efficient firms (peers) and inefficient ones (followers) over time, changes in the performance relationship network are assessed in a graph-theoretic approach. In this study, geographical and structural specifics of DMU groups are taken into account. The study reveals similarities and differences between OEMs and their suppliers regarding the importance of value drivers and detects periods of performance losses and recovery from the global economic crisis.

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    • Brandenburg, Marcus

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  • 2021
  • Journal Article
  • • Marcus Brandenburg
    • Gerd Hahn
  • • Automotive industry
    • Data Envelopment Analysis
    • Financial performance
    • Supply networks

• fluprodia (Fluid Property Diagram)

  Witte, F. (2021). fluprodia (Fluid Property Diagram). Zenodo. http://doi.org/10.5281/ZENODO.3795771

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    • Witte, Francesco

  • Fachbereich

    • Fachbereich 2: Energy and Life Science

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  • 2021
  • Miscellaneous
  • • Francesco Witte
  • • Fluid Property Diagram
    • Thermodynamics
    • Phases
    • Isoline

• Training visuospatial skills for medical ultrasound imaging with a desktop-based learning game

  Mayer, L., Süncksen, M., Reinhold, S., Bertel, S., & Teistler, M. (2021). Training visuospatial skills for medical ultrasound imaging with a desktop-based learning game. In 9th International Conference on Serious Games and Applications for Health (SeGAH 2021). Dubai, United Arab Emirates.

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  • Personenseiten

    • Bertel, Sven
    • Teistler, Michael

  • Abteilung/Einrichtung

    • CIVU – Center for Interaction, Visualization and Usability

  • Fachbereich

    • Fachbereich 3: Information und Kommunikation

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  • 2021
  • Conference Paper
  • • Lukas Mayer
    • Matthias Süncksen
    • Sascha Reinhold
    • Sven Bertel
    • Michael Teistler

• Grid Services and Stress Reduction with a Flywheel in the Rotor of a Wind Turbine

  Jauch, C. (2021). Grid Services and Stress Reduction with a Flywheel in the Rotor of a Wind Turbine. Energies, 14. http://doi.org/10.3390/en14092556

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  Wind power penetration increases in most grids and the sizes of wind turbines increase. This leads to increasingly tough requirements, which are imposed on wind turbines, both from the grid as well as from economics. Some of these partially contradictory requirements can only be satisfied with additional control mechanisms in the wind turbines. In this paper, such a mechanism, i.e., a hydraulic–pneumatic flywheel system in the rotor of a wind turbine, is discussed. This flywheel system supports a wind turbine in providing grid services such as steadying the power infeed, fast frequency response, continuous inertia provision, power system stabilization, and low voltage ride-through. In addition, it can help mitigate the stress on the mechanical structure of a wind turbine, which results from varying operating points, imbalances in the rotor, gravitation that acts on the blades, in-plane vibrations, and emergency braking. The study presented in this paper is based on simulations of a publicly available reference wind turbine. Both the rotor blade design as well as the design of the flywheel system are as previously published. It is discussed how the aforementioned grid services and the stress reduction mechanisms can be combined. Finally, it is concluded that such a flywheel system broadens the range of control mechanisms of a wind turbine substantially, which is beneficial for the grid as well as for the wind turbine itself.

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    • Jauch, Clemens

  • Fachbereich

    • Fachbereich 2: Energy and Life Science

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  • 2021
  • Journal Article
  • • Prof. Dr. Clemens Jauch