@book{UibelPeterson2023,
  author    = {Uibel, Thomas and Peterson, Leif Arne},
  title     = {Tagungsband Aachener Holzbautagung 2023},
  editor    = {Uibel, Thomas and Peterson, Leif Arne},
  publisher = {FH Aachen},
  address   = {Aachen},
  issn      = {2197-4489},
  year      = {2023},
  language  = {de}
}
@article{MoehrenBergmannJanseretal.2023,
  author    = {M{\"o}hren, Felix and Bergmann, Ole and Janser, Frank and Braun, Carsten},
  title     = {On the influence of elasticity on propeller performance: a parametric study},
  series = {CEAS Aeronautical Journal},
  volume    = {14},
  journal   = {CEAS Aeronautical Journal},
  publisher = {Springer Nature},
  address   = {Berlin},
  issn      = {1869-5590 (Online)},
  doi       = {10.1007/s13272-023-00649-y},
  pages     = {311 -- 323},
  year      = {2023},
  abstract  = {The aerodynamic performance of propellers strongly depends on their geometry and, consequently, on aeroelastic deformations. Knowledge of the extent of the impact is crucial for overall aircraft performance. An integrated simulation environment for steady aeroelastic propeller simulations is presented. The simulation environment is applied to determine the impact of elastic deformations on the aerodynamic propeller performance. The aerodynamic module includes a blade element momentum approach to calculate aerodynamic loads. The structural module is based on finite beam elements, according to Timoshenko theory, including moderate deflections. Several fixed-pitch propellers with thin-walled cross sections made of both isotropic and non-isotropic materials are investigated. The essential parameters are varied: diameter, disc loading, sweep, material, rotational, and flight velocity. The relative change of thrust between rigid and elastic blades quantifies the impact of propeller elasticity. Swept propellers of large diameters or low disc loadings can decrease the thrust significantly. High flight velocities and low material stiffness amplify this tendency. Performance calculations without consideration of propeller elasticity can lead to decreased efficiency. To avoid cost- and time-intense redesigns, propeller elasticity should be considered for swept planforms and low disc loadings.},
  language  = {en}
}
@book{JanserHavermannHoeveleretal.2023,
  author    = {Janser, Frank and Havermann, Marc and Hoeveler, Bastian and Hertz, Cyril and Bergmann, Ole},
  title     = {Str{\"o}mungslehre und Aerodynamik : inkompressible Profile und Tragfl{\"u}gelaerodynamik, Band 2},
  edition   = {4. Auflage},
  publisher = {Mainz},
  address   = {Aachen},
  isbn      = {978-3-8107-0261-6},
  pages     = {XIII, 211 Seiten},
  year      = {2023},
  abstract  = {Das vorliegende Buch dient als Grundlage f{\"u}r die Bachelor- und Master-Ausbildung von Studierenden im Fachgebiet Str{\"o}mungslehre und Aerodynamik. Im hier behandelten Teilbereich der inkompressiblen Profile und Tragfl{\"u}gelaerodynamik werden schwerpunktm{\"a}ßig die folgenden Themen besprochen: - Profilaerodynamik - Tragfl{\"u}gelaerodynamik - Flugzeugpolare - Methoden zur Flugbereichserweiterung - Schwebeschub und Schwebeleistung - Propellerblattaerodynamik - Numerische Methoden zur Tragfl{\"u}gelberechnung},
  language  = {de}
}
@inproceedings{MoehrenBergmannJanseretal.2023,
  author    = {M{\"o}hren, Felix and Bergmann, Ole and Janser, Frank and Braun, Carsten},
  title     = {On the determination of harmonic propeller loads},
  series = {AIAA SCITECH 2023 Forum},
  booktitle = {AIAA SCITECH 2023 Forum},
  publisher = {AIAA},
  doi       = {10.2514/6.2023-2404},
  pages     = {12 Seiten},
  year      = {2023},
  abstract  = {Dynamic loads significantly impact the structural design of propeller blades due to fatigue and static strength. Since propellers are elastic structures, deformations and aerodynamic loads are coupled. In the past, propeller manufacturers established procedures to determine unsteady aerodynamic loads and the structural response with analytical steady-state calculations. According to the approach, aeroelastic coupling primarily consists of torsional deformations. They neglect bending deformations, deformation velocities, and inertia terms. This paper validates the assumptions above for a General Aviation propeller and a lift propeller for urban air mobility or large cargo drones. Fully coupled reduced-order simulations determine the dynamic loads in the time domain. A quasi-steady blade element momentum approach transfers loads to one-dimensional finite beam elements. The simulation results are in relatively good agreement with the analytical method for the General Aviation propeller but show increasing errors for the slender lift propeller. The analytical approach is modified to consider the induced velocities. Still, inertia and velocity proportional terms play a significant role for the lift propeller due to increased elasticity. The assumption that only torsional deformations significantly impact the dynamic loads of propellers is not valid. Adequate determination of dynamic loads of such designs requires coupled aeroelastic simulations or advanced analytical procedures.},
  language  = {en}
}
@article{BergmannMoehrenBraunetal.2023,
  author    = {Bergmann, Ole and M{\"o}hren, Felix and Braun, Carsten and Janser, Frank},
  title     = {On the influence of elasticity on swept propeller noise},
  series = {AIAA SCITECH 2023 Forum},
  journal   = {AIAA SCITECH 2023 Forum},
  publisher = {AIAA},
  address   = {Reston, Va.},
  doi       = {10.2514/6.2023-0210},
  year      = {2023},
  abstract  = {High aerodynamic efficiency requires propellers with high aspect ratios, while propeller sweep potentially reduces noise. Propeller sweep and high aspect ratios increase elasticity and coupling of structural mechanics and aerodynamics, affecting the propeller performance and noise. Therefore, this paper analyzes the influence of elasticity on forward-swept, backward-swept, and unswept propellers in hover conditions. A reduced-order blade element momentum approach is coupled with a one-dimensional Timoshenko beam theory and Farassat's formulation 1A. The results of the aeroelastic simulation are used as input for the aeroacoustic calculation. The analysis shows that elasticity influences noise radiation because thickness and loading noise respond differently to deformations. In the case of the backward-swept propeller, the location of the maximum sound pressure level shifts forward by 0.5 °, while in the case of the forward-swept propeller, it shifts backward by 0.5 °. Therefore, aeroacoustic optimization requires the consideration of propeller deformation.},
  language  = {en}
}
@book{SeptZillingerWiechertetal.2023,
  author    = {Sept, Marcel and Zillinger, Christina and Wiechert, Johanna and Thelen, Marius},
  title     = {Aachener Online-Schriften Wirtschaft und Recht. Band 6. 01/2023},
  editor    = {Kroll-Ludwigs, Kathrin and Bassen-Metz, Yasmine and Bernecker, Andreas and Eggert, Mathias and Fritz, Thomas and Golland, Alexander and H{\"o}hne, Tim and Tran, Duc Hung and Vogt, J{\"u}rgen},
  publisher = {FH Aachen / Fachbereich Wirtschaftswissenschaften},
  address   = {Aachen},
  publisher      = {Fachhochschule Aachen},
  pages     = {265 Seiten},
  year      = {2023},
  abstract  = {Inhaltsverzeichnis - Bachelorarbeiten 1. Zukunft der Rente - Kann eine Erwerbst{\"a}tigenversicherung das demografische Problem nachhaltig l{\"o}sen? - Marcel Sept | Seite 4-73 2. Die versammlungsgebundenen Aktion{\"a}rsrechte in der neuen virtuellen Hauptversammlung - eine Bewertung aus Unternehmer- und Aktion{\"a}rssicht - Christina Zillinger | Seite 74-130 3. Praxisleitfaden f{\"u}r den Arbeitgeber zum gesetzlichen Sonderk{\"u}ndigungsschutz - Was muss der Arbeitgeber tun, um durch Gesetz besonders gesch{\"u}tzten Arbeitnehmern k{\"u}ndigen zu k{\"o}nnen? - Johanna Wiechert | Seite 131-195 4. Die Steuerverg{\"u}nstigung bei Umstrukturierungen im Konzern nach \S 6a GrEStG im Lichte der aktuellen Rechtsprechung - Marius Thelen | Seite 196-265},
  language  = {de}
}
@book{ScheilenPeifferGoerlichetal.2023,
  author    = {Scheilen, Jana and Peiffer, Max and G{\"o}rlich, Anna-Luisa and Hacke, Theresa},
  title     = {Aachener Online-Schriften Wirtschaft und Recht. Band 7. 02/2023},
  editor    = {Kroll-Ludwigs, Kathrin and Bassen-Metz, Yasmine and Bernecker, Andreas and Eggert, Mathias and Fritz, Thomas and Golland, Alexander and H{\"o}hne, Tim and Tran, Duc Hung and Vogt, J{\"u}rgen},
  publisher = {FH Aachen / Fachbereich Wirtschaftswissenschaften},
  address   = {Aachen},
  publisher      = {Fachhochschule Aachen},
  pages     = {245 Seiten},
  year      = {2023},
  abstract  = {1. Die Wirksamkeitsvoraussetzungen der Verdachtsk{\"u}ndigung gegen{\"u}ber einem Arbeitnehmer - Jana Scheilen | Seite 4-66 2. Besteuerungsinkongruenzen im Internationalen Steuerrecht - die Umsetzung der ATAD II in Form des \S 4k EStG in Bezug auf hybride Gesellschaften und Betriebsst{\"a}tten - Max Peiffer | Seite 67-126 3. Der Zuzug einer Gesellschaft aus einem Drittstaat nach Deutschland - Herausforderungen durch die modifizierte Sitztheorie und L{\"o}sungsm{\"o}glichkeiten - Anna-Luisa G{\"o}rlich | Seite 127-189 4. Escalation of Commitment und seine Einflussfaktoren in der unternehmerischen Entscheidungsfindung: Ein Szenario-Experiment - Theresa Hacke | Seite 190-245},
  language  = {de}
}
@article{RhodenBallGrajewskietal.2023,
  author    = {Rhoden, Imke and Ball, Christopher Stephen and Grajewski, Matthias and Kuckshinrich, Wilhelm},
  title     = {Reverse engineering of stakeholder preferences - A multi-criteria assessment of the German passenger car sector},
  series = {Renewable and Sustainable Energy Reviews},
  volume    = {181},
  journal   = {Renewable and Sustainable Energy Reviews},
  number    = {July 2023},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {1364-0321},
  doi       = {10.1016/j.rser.2023.113352},
  pages     = {Article number: 113352},
  year      = {2023},
  abstract  = {Germany is a frontrunner in setting frameworks for the transition to a low-carbon system. The mobility sector plays a significant role in this shift, affecting different people and groups on multiple levels. Without acceptance from these stakeholders, emission targets are out of reach. This research analyzes how the heterogeneous preferences of various stakeholders align with the transformation of the mobility sector, looking at the extent to which the German transformation paths are supported and where stakeholders are located. Under the research objective of comparing stakeholders' preferences to identify which car segments require additional support for a successful climate transition, a status quo of stakeholders and car performance criteria is the foundation for the analysis. Stakeholders' hidden preferences hinder the derivation of criteria weightings from stakeholders; therefore, a ranking from observed preferences is used. This study's inverse multi-criteria decision analysis means that weightings can be predicted and used together with a recalibrated performance matrix to explore future preferences toward car segments. Results show that stakeholders prefer medium-sized cars, with the trend pointing towards the increased potential for alternative propulsion technologies and electrified vehicles. These insights can guide the improved targeting of policy supporting the energy and mobility transformation. Additionally, the method proposed in this work can fully handle subjective approaches while incorporating a priori information. A software implementation of the proposed method completes this work and is made publicly available.},
  language  = {en}
}
@article{VoegeleJosyabhatlaBalletal.2023,
  author    = {V{\"o}gele, Stefan and Josyabhatla, Vishnu Teja and Ball, Christopher Stephen and Rhoden, Imke and Grajewski, Matthias and R{\"u}bbelke, Dirk and Kuckshinrichs, Wilhelm},
  title     = {Robust assessment of energy scenarios from stakeholders' perspectives},
  series = {Energy},
  journal   = {Energy},
  number    = {In Press, Article 128326},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {1873-6785 (Online)},
  doi       = {10.1016/j.energy.2023.128326},
  year      = {2023},
  abstract  = {Using scenarios is vital in identifying and specifying measures for successfully transforming the energy system. Such transformations can be particularly challenging and require the support of a broader set of stakeholders. Otherwise, there will be opposition in the form of reluctance to adopt the necessary technologies. Usually, processes for considering stakeholders' perspectives are very time-consuming and costly. In particular, there are uncertainties about how to deal with modifications in the scenarios. In principle, new consulting processes will be required. In our study, we show how multi-criteria decision analysis can be used to analyze stakeholders' attitudes toward transition paths. Since stakeholders differ regarding their preferences and time horizons, we employ a multi-criteria decision analysis approach to identify which stakeholders will support or oppose a transition path. We provide a flexible template for analyzing stakeholder preferences toward transition paths. This flexibility comes from the fact that our multi-criteria decision aid-based approach does not involve intensive empirical work with stakeholders. Instead, it involves subjecting assumptions to robustness analysis, which can help identify options to influence stakeholders' attitudes toward transitions.},
  language  = {en}
}