openHSU (HSU Hamburg)
Not a member yet
7291 research outputs found
Sort by
Pädagogisches Handeln in professionalisierten Interaktionen
No full textDieser Artikel ist unter der Creative Commons Namensnennung 4.0 International Lizenz veröffentlicht (https://creativecommons.org/licenses/by/4.0/deed.de).Vo
Overview, comparison and extension of concepts for current-controlled, adjustable inductances
No full textDistributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).Vo
Casual yet crucial
No full textThis is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License (http://creativecommons.org/licenses/by-nc-nd/4.0/)HSU-O
Practices of (de)legitimation in world politics
No full textThis forum proposes a practice-oriented approach to (de)legitimation processes in world politics. Drawing on international practice theory and visual IR, among other fields, our approach offers an important extension of existing literature on (de)legitimation that mostly concentrates on discursive (de)legitimation. Instead, this forum focuses on a broader variety of practices of (de)legitimation, such as bodily gestures and visual (de)legitimation practices, including as communicated via (social) media. The forum’s six contributions demonstrate the significance and conceptual promise of our approach by showcasing various conceptual entry points and empirical illustrations. Matthias Ecker-Ehrhardt analyzes the everyday legitimation practices of international organization officials acting as the “personal face” of institutional processes on social media. Anna Geis examines the Taliban’s symbolic and embodied practices of self-legitimation during the Doha negotiations with the United States in 2019–2020. Subsequently, Stanislav Budnitsky conceptualizes the reoccurring practice of verbally and physically assaulting foreign experts on Russian televised political talk shows as embodied legitimation practices of Russia’s anti-Western geopolitical agenda. David Shim and Laurenz Krumbacher draw attention to the everyday, visualized legitimation practices of climate activists on TikTok, emphasizing their performative dimension. Frank Gadinger turns to Volodymyr Zelenskyy’s social media-oriented public performances in parliaments around the world. Nora Stappert and Siddharth Tripathi conclude the forum with a discussion of limitations, remaining challenges, and future research avenues, including using decolonial and postcolonial approaches. Combined, our forum opens an avenue for future research that considers existing and new forms of (de)legitimation in global affairs through the lens of practice while emphasizing the crucial role of legitimacy and normativity in international practices.Vo
A dynamic immersed boundary method for simulating an adaptive nozzle generating discrete wind gusts
No full textThe recently developed wind gust generator, the adaptive nozzle (Wood and Breuer, 2025) , features a nozzle
with a fully rotatable upper contour, enabling a smooth gust generation with low unwanted flow disturbances.
While preserving the underlying gust-generation principle of its predecessor, the new design significantly
reduces pressure losses caused by flow blockage and preserves the original horizontal trajectory of the flow
along the streamwise direction. While experiments have validated the improved design, a comprehensive
numerical analysis is crucial to resolve the three-dimensional flow fields across the entire computational
domain. This shall also facilitate capturing the resulting transient aerodynamic loads on a wind tunnel specimen
— quantities difficult to measure experimentally. To accurately capture the complex flow dynamics, high-
fidelity large-eddy simulations are conducted, modeling the nozzle’s upper contour as a dynamic immersed
boundary (IB). A curvilinear Eulerian grid is employed to ensure both efficient and precise spatial resolution
of the problem. The moving least-squares (MLS) version of the direct forcing IB approach (Vanella and Balaras,
2009) is used to construct an IB kernel for each Lagrangian marker. Additionally, the MLS approach is also
applied to construct one-sided kernel functions for Lagrangian points near the boundaries of the computational
domain. Challenges related to the efficient IB simulation on curvilinear grids are addressed, and a solution is
proposed within the MLS framework. The predicted results are analyzed in detail and validated against the
experimental data by Wood and Breuer (2025) , providing insights into the effectiveness of the new design in
generating controlled wind gusts.Vo
Updating descriptive sensory evaluation of chicken: proposing new protocols and statistical analysis
No full textThis is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)Descriptive sensory chicken evaluations are mostly conducted using prepared sous-vide breasts. Sustainable poultry systems in response to climate change and biodiversity loss require a closer examination of existing sensory evaluation methods. To address the new requirements, we present sensory evaluation results from two different projects. Using skin, breast, thighs, and minced variations, we demonstrate (1) how chicken carcasses can be evaluated holistically using more than the breast, (2) how animal-specific differences can be eliminated and (3) whether a classical quantitative descriptive analysis (QDA) and the more cost efficient and rapid method of Napping creates better results. This enables us to provide statistical guidance for selecting the sensory evaluation method and design for future sensory evaluations. This opens new evaluation criteria for local breeds and alternative husbandry systems. Furthermore, a new approach for analyzing Napping data is proposed. The implications of our results extend to breeders, policymakers, and scholars, providing information about sensory evaluation of chicken meat to effectively update criteria and methods.A
Detransitionserfahrungen von trans und genderdiversen Personen in Deutschland
No full textHintergrund: Detransition bezeichnet das Abbrechen einer Transition oder die erneute Änderung der Geschlechtsidentität nach erfolgter Transition. In Deutschland wurde die Situation von detrans Personen, also von Personen mit erfolgter Detransition, bislang nicht erfasst. Ziel dieser Untersuchung soll es daher sein, erstmalig detrans Menschen in Deutschland zu beschreiben und deren Gründe zur Detransition, deren soziale Unterstützung, deren Lebenszufriedenheit und deren Behandlungserfahrungen während der Transition und Detransition zu untersuchen.
Methode: Zwischen April und Juni 2023 wurde eine retrospektive Online-Befragung von erwachsenen detrans Personen in Deutschland durchgeführt. Die Ergebnisse wurden mittels Häufigkeitsanalysen quantitativ und über eine qualitative Inhaltsanalyse nach Kuckartz und Rädiker (2022) auch qualitativ ausgewertet. Die finale Untersuchungsstichprobe umfasste n = 20 detrans Personen, wovon n = 3 (15%) ein männliches Zuweisungsgeschlecht angaben.
Ergebnisse: 45% der Befragten identifizierten sich als Frau, je ein Drittel (30%) als detrans Frau oder nicht-binär, keine der befragten Personen als Mann oder trans Mann. Das Durchschnittsalter betrug 31 Jahre. Als Grund für die Detransition gaben 65% der Befragten an, realisiert zu haben, dass die Dysphorie mit anderen Dingen zusammenhing. Die Teilnehmenden berichteten von einer durchschnittlichen sozialen Unterstützung (M = 3.7) sowie einer unterdurchschnittlichen geschlechtsbezogenen Lebenszufriedenheit (M = 2.7). Die meisten detrans Personen nehmen sowohl während der Transition (86%) als auch während der Detransition (71%) psychotherapeutische Begleitung in Anspruch. Die qualitative Auswertung ergab sowohl positive, negative, aber auch neutrale Behandlungserfahrungen während der Transition und Detransition, die von den Befragten berichtet wurden.
Diskussion: Aus den Ergebnissen lässt sich ableiten, dass es sich bei detrans Personen in Deutschland um eine heterogene Gruppe handelt, in der verschiedene Gründe für die Detransition berichtet und diverse Behandlungserfahrungen gemacht werden. Hinsichtlich der Lebenszufriedenheit und der sozialen Unterstützung konnten außerdem Hinweise auf Unterschiede anhand des bei der Geburt zugewiesenen Geschlechts beobachtet werden. Ein besonderer Bedarf liegt im Zugang zu Informationen hinsichtlich der Möglichkeiten zur Durchführung einer Detransition.Vo
Experimental study on a novel wind gust generator based on an adaptive nozzle design
No full textThis is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).The paper presents a novel design of a wind gust generator based on an adaptive nozzle for wind tunnel applications and its experimental investigation. The key feature of this design is the movable upper wall of the nozzle, which adjusts the cross-section of the nozzle's outlet. For this purpose, the upper contour of the nozzle is connected to a programmable and fast-moving tooth belt axis, enabling rapid changes in the nozzle geometry to generate reproducible horizontal wind gusts that develop along a flat ground plate. The experimental setup primarily relies on particle-image velocimetry as an optical measurement technique, supported by a constant-temperature anemometer and pressure taps at specific locations. The gusts are generated using a well-defined motion pattern of the movable nozzle, following a (1-cos)-type signal. A combination of velocity and surface pressure measurements is carried out, analyzing the gust development at various positions along the ground plate in streamwise direction. Both data sets are used to quantify the adaptive nozzle's potential as an effective tool for wind gust generation, facilitating future studies on highly dynamic fluid-structure interactions under wind gust load. Additionally, the well-designed experiment is planned to serve as a valuable validation case for numerical methods.Vo
