@article{MischkeNeuss2009, author = {Mischke, Winfried and Neuß, Frank}, title = {F{\"u}hrt die {\"U}bernahme der Domain eines anderen Unternehmers zur Haftung f{\"u}r dessen Schulden nach \S 25 HGB?}, series = {Zeitschrift f{\"u}r Vertragsgestaltung, Schuld- und Haftungsrecht : ZGS}, volume = {8}, journal = {Zeitschrift f{\"u}r Vertragsgestaltung, Schuld- und Haftungsrecht : ZGS}, publisher = {ZAP, Verl. f. die Rechts- und Anwaltspraxis}, address = {Recklinghausen}, issn = {1619-7011}, pages = {407 -- 409}, year = {2009}, language = {de} } @inproceedings{DilgerMundDiltheyetal.2003, author = {Dilger, Klaus and Mund, Frank and Dilthey, Ulrich and Schleser, Markus and Raupach, Michael and Walk-Lauffer, Bernd}, title = {Einsatz einer polymeren Phase zur Verbundverbesserung}, series = {Textile reinforced structures : proceedings of the 2nd Colloquium on Textile Reinforced Structures (CTRS2), Dresden, Germany, 29.9. - 1.10.2003}, booktitle = {Textile reinforced structures : proceedings of the 2nd Colloquium on Textile Reinforced Structures (CTRS2), Dresden, Germany, 29.9. - 1.10.2003}, editor = {Curbach, Manfred}, publisher = {Techn. Univ.}, address = {Dresden}, organization = {Colloquium on Textile Reinforced Structures <2, 2003, Dresden>}, isbn = {3-86005-386-8}, pages = {133 -- 144}, year = {2003}, language = {de} } @inproceedings{HartungHillgaertnerSchmitzetal.2014, author = {Hartung, Frank and Hillg{\"a}rtner, Michael and Schmitz, G{\"u}nter and Schuba, Marko and Adolphs, Fabian and Hoffend, Jens and Theis, Jochen}, title = {IT-Sicherheit im Automobil}, series = {AmE 2014 : Automotive meets Electronics, Beitr{\"a}ge der 5. GMM-Fachtagung vom 18. bis 19. Februar 2014 in Dortmund. (GMM-Fachbericht ; 78)}, booktitle = {AmE 2014 : Automotive meets Electronics, Beitr{\"a}ge der 5. GMM-Fachtagung vom 18. bis 19. Februar 2014 in Dortmund. (GMM-Fachbericht ; 78)}, publisher = {VDE-Verl.}, address = {Berlin}, organization = {VDE/VDI-Gesellschaft Mikroelektronik, Mikrosystem- und Feinwerktechnik (GMM)}, isbn = {978-3-8007-3580-8}, pages = {CD-ROM}, year = {2014}, language = {de} } @inproceedings{NeuJanserKhatibietal.2015, author = {Neu, Eugen and Janser, Frank and Khatibi, Akbar A. and Orifici, Adrian C.}, title = {Operational modal analysis of a cantilever in a wind tunnel using optical fiber bragg grating sensors}, series = {6th International Operational Modal Analysis Conference. IOMAC´15. 2015 May 12-14 Gijon - Spain}, booktitle = {6th International Operational Modal Analysis Conference. IOMAC´15. 2015 May 12-14 Gijon - Spain}, doi = {10.13140/RG.2.1.3753.0324}, pages = {10 S.}, year = {2015}, language = {en} } @article{BindalSharmaJanseretal.2013, author = {Bindal, Gaurav and Sharma, Sparsh and Janser, Frank and Neu, Eugen}, title = {Detailed analysis of variables affecting wing kinematics of bat flight}, series = {SAE International Journal of Aerospace}, volume = {6}, journal = {SAE International Journal of Aerospace}, number = {2}, issn = {1946-3901}, doi = {10.4271/2013-01-9003}, pages = {811 -- 818}, year = {2013}, language = {en} } @techreport{DilgerFischerHellmannsetal.2013, author = {Dilger, Klaus and Fischer, Fabian and Hellmanns, Mark and Werner, Frank and Wittor, Bj{\"o}rn}, title = {Applikation und Einsatz von faserverst{\"a}rkten Klebstoffen im Bauwesen (FibrAdh) : Schlussbericht : gef{\"o}rdertes Vorhaben 16.956 B / DVS-Nr. 08.072}, pages = {66 S.}, year = {2013}, language = {de} } @misc{AhlbornGerlachIkenetal.2012, author = {Ahlborn, Kristina and Gerlach, Frank and Iken, Heiko and Sch{\"o}ning, Michael Josef and Vonau, Winfried}, title = {Miniaturisierte, potentiometrische Indikatorelektrode und Verfahren zu deren Herstellung : Offenlegungsschrift}, pages = {7 S.}, year = {2012}, language = {de} } @book{AltensenAltSchumny1983, author = {Altensen, Frank and Alt, Helmut and Schumny, Harald}, title = {Kryptologie (HP-41 C/CV) : Chiffrierung, Textverschl{\"u}sselung, Datenschutz, Morsealphabet (Vieweg-Programmbibliothek Taschenrechner ; 7) / Helmut Alt ; Harald Schumny [Hrsg.]}, publisher = {Vieweg + Teubner}, address = {Wiesbaden}, isbn = {3-528-04256-7}, pages = {V, 92 S.}, year = {1983}, language = {de} } @inproceedings{RoehrigGrossmannKuenemundetal.2008, author = {R{\"o}hrig, Christof and Großmann, Uwe and K{\"u}nemund, Frank and Gansemer, Sebastian and Sch{\"u}rmann, Volker and Wollert, J{\"o}rg}, title = {Positionsbestimmung mittels Funktechnologien - Vergleich von Verfahren und Technologien mit exemplarischer Demonstration}, series = {Wireless-Technologies-Kongress 2008 : von der Technologie zur Anwendung / Hrsg. J{\"o}rg F. Wollert}, booktitle = {Wireless-Technologies-Kongress 2008 : von der Technologie zur Anwendung / Hrsg. J{\"o}rg F. Wollert}, publisher = {AKA}, address = {Heidelberg}, isbn = {978-3-89838-608-1}, pages = {337 -- 348}, year = {2008}, language = {de} } @incollection{BorchertBremen2014, author = {Borchert, J{\"o}rg and Bremen, Frank}, title = {Gesch{\"a}fts- und Organisationsmodelle f{\"u}r ein Strom- und Gas-Portfoliomanagement}, series = {Optimierte Strom- und Gasbeschaffung in der Energiewirtschaftsbranche}, booktitle = {Optimierte Strom- und Gasbeschaffung in der Energiewirtschaftsbranche}, publisher = {KS-Energy-Verl.}, address = {Berlin}, isbn = {978-3-9813142-9-8}, pages = {11 -- 28}, year = {2014}, language = {de} } @article{DelleHuckBaeckeretal.2015, author = {Delle, Lotta E. and Huck, Christina and B{\"a}cker, Matthias and M{\"u}ller, Frank and Grandthyll, Samuel and Jacobs, Karin and Lilischkis, Rainer and Vu, Xuan T. and Sch{\"o}ning, Michael Josef and Wagner, Patrick and Thoelen, Roland and Weil, Maryam and Ingebrandt, Sven}, title = {Impedimetric immunosensor for the detection of histamine based on reduced graphene oxide}, series = {Physica status solidi (a)}, volume = {212}, journal = {Physica status solidi (a)}, number = {6}, publisher = {Wiley}, address = {Weinheim}, issn = {1862-6319}, doi = {10.1002/pssa.201431863}, pages = {1327 -- 1334}, year = {2015}, language = {en} } @article{BouwmanGuldenHeijdenetal.2013, author = {Bouwman, Peter and Gulden, Hanneke van der and Heijden, Ingrid van der and Drost, Rinske and Klijn, Christiaan N. and Prasetyanti, Pramudita and Pieterse, Mark and Wientjens, Ellen and Seibler, Jost and Hogervorst, Frank B. L. and Jonkers, Jos}, title = {A High-Throughput Functional Complementation Assay for Classification of BRCA1 Missense Variants}, series = {Cancer Discovery}, journal = {Cancer Discovery}, number = {3}, issn = {2159-8290}, doi = {10.1158/2159-8290.CD-13-0094}, pages = {1142 -- 1152}, year = {2013}, language = {en} } @inproceedings{NakagawaMichauxKallweitetal.2015, author = {Nakagawa, Masaki and Michaux, Frank and Kallweit, Stephan and Maeda, Kazuhiro}, title = {Unsteady flow measurements in the wake behind a wind-tunnel car model by using high-speed planar PIV}, series = {11TH International Symposium on Particle Image Velocimetry - PIV15 Santa Barbara, California, September 14-16, 2015}, booktitle = {11TH International Symposium on Particle Image Velocimetry - PIV15 Santa Barbara, California, September 14-16, 2015}, pages = {21 S.}, year = {2015}, abstract = {This study investigates unsteady characteristics of the wake behind a 28\%-scale car model in a wind tunnel using highspeed planar particle image velocimetry (PIV). The car model is based on a hatchback passenger car that is known to have relatively high fluctuations in its aerodynamic loads. This study primarily focuses on the lateral motion of the flow on the horizontal plane to determine the effect of the flow motion on the straight-line stability and the initial steering response of the actual car on a track. This paper first compares the flow fields in the wake behind the above mentioned model obtained using conventional and high-speed planar PIV, with sampling frequencies of 8 Hz and 1 kHz, respectively. Large asymmetrically coherent flow structures, which fluctuate at frequencies below 2 Hz, are observed in the results of highspeed PIV measurements, whereas conventional PIV is unable to capture these features of the flow owing to aliasing. This flow pattern with a laterally swaying motion is represented by opposite signs of cross-correlation coefficients of streamwise velocity fluctuations for the two sides of the car model. Effects of two aerodynamic devices that are known to reduce the fluctuation levels of the aerodynamic loads are then extensively investigated. The correlation analyses reveal that these devices indeed reduce the fluctuation levels of the flow and the correlation values around the rear combination-lamp, but it is found that the effects of these devices are different around the c-pillar.}, language = {en} } @article{HoevelerJanserBindewaldetal.2015, author = {Hoeveler, Bastian and Janser, Frank and Bindewald, Thorsten and Gebhardt, Andreas}, title = {Entwurf, Fertigung und Untersuchung eines Windkanalmodells eines innovativen, senkrechtstartenden Kleinflugzeuges}, series = {RTejournal - Forum f{\"u}r Rapid Technologie}, journal = {RTejournal - Forum f{\"u}r Rapid Technologie}, number = {12}, publisher = {Fachhochschule Aachen}, address = {Aachen}, issn = {1614-0923}, url = {http://nbn-resolving.de/urn:nbn:de:0009-2-42921}, pages = {1 -- 5}, year = {2015}, language = {de} } @book{JanserHavermann2015, author = {Janser, Frank and Havermann, Marc}, title = {Inkompressible Str{\"o}mungen}, edition = {3. Aufl.}, publisher = {Verlagshaus Mainz GmbH}, address = {Aachen}, isbn = {978-3-86130-446-3}, pages = {VIII, 83 S. : Ill ; Diagramme}, year = {2015}, language = {de} } @inproceedings{NakagawaKallweitMichauxetal.2016, author = {Nakagawa, Masaki and Kallweit, Stephan and Michaux, Frank and Hojo, Teppei}, title = {Typical Velocity Fields and Vortical Structures around a Formula One Car, based on Experimental Investigations using Particle Image Velocimetry}, series = {SAE International Journal of Passenger Cars - Mechanical Systems}, booktitle = {SAE International Journal of Passenger Cars - Mechanical Systems}, issn = {1946-4002}, doi = {10.4271/2016-01-1611}, pages = {18 S.}, year = {2016}, language = {en} } @incollection{SchneiderWisselinkCzarneckietal.2024, author = {Schneider, Dominik and Wisselink, Frank and Czarnecki, Christian and N{\"o}lle, Nikolai}, title = {Benefits and framework conditions for information-driven business models concerning the Internet of Things}, series = {Digitalization in companies}, booktitle = {Digitalization in companies}, publisher = {Springer}, address = {Wiesbaden}, isbn = {978-3-658-39093-8 (Print)}, doi = {10.1007/978-3-658-39094-5_5}, pages = {59 -- 75}, year = {2024}, abstract = {In the context of the increasing digitalization, the Internet of Things (IoT) is seen as a technological driver through which completely new business models can emerge in the interaction of different players. Identified key players include traditional industrial companies, municipalities and telecommunications companies. The latter, by providing connectivity, ensure that small devices with tiny batteries can be connected almost anywhere and directly to the Internet. There are already many IoT use cases on the market that provide simplification for end users, such as Philips Hue Tap. In addition to business models based on connectivity, there is great potential for information-driven business models that can support or enhance existing business models. One example is the IoT use case Park and Joy, which uses sensors to connect parking spaces and inform drivers about available parking spaces in real time. Information-driven business models can be based on data generated in IoT use cases. For example, a telecommunications company can add value by deriving more decision-relevant information - called insights - from data that is used to increase decision agility. In addition, insights can be monetized. The monetization of insights can only be sustainable, if careful attention is taken and frameworks are considered. In this chapter, the concept of information-driven business models is explained and illustrated with the concrete use case Park and Joy. In addition, the benefits, risks and framework conditions are discussed.}, 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} } @article{MoehrenBergmannJanseretal.2024, author = {M{\"o}hren, Felix and Bergmann, Ole and Janser, Frank and Braun, Carsten}, title = {Assessment of structural mechanical effects related to torsional deformations of propellers}, series = {CEAS Aeronautical Journal}, journal = {CEAS Aeronautical Journal}, publisher = {Springer}, address = {Wien}, issn = {1869-5590 (eISSN)}, doi = {10.1007/s13272-024-00737-7}, pages = {22 Seiten}, year = {2024}, abstract = {Lifting propellers are of increasing interest for Advanced Air Mobility. All propellers and rotors are initially twisted beams, showing significant extension-twist coupling and centrifugal twisting. Torsional deformations severely impact aerodynamic performance. This paper presents a novel approach to assess different reasons for torsional deformations. A reduced-order model runs large parameter sweeps with algebraic formulations and numerical solution procedures. Generic beams represent three different propeller types for General Aviation, Commercial Aviation, and Advanced Air Mobility. Simulations include solid and hollow cross-sections made of aluminum, steel, and carbon fiber-reinforced polymer. The investigation shows that centrifugal twisting moments depend on both the elastic and initial twist. The determination of the centrifugal twisting moment solely based on the initial twist suffers from errors exceeding 5\% in some cases. The nonlinear parts of the torsional rigidity do not significantly impact the overall torsional rigidity for the investigated propeller types. The extension-twist coupling related to the initial and elastic twist in combination with tension forces significantly impacts the net cross-sectional torsional loads. While the increase in torsional stiffness due to initial twist contributes to the overall stiffness for General and Commercial Aviation propellers, its contribution to the lift propeller's stiffness is limited. The paper closes with the presentation of approximations for each effect identified as significant. Numerical evaluations are necessary to determine each effect for inhomogeneous cross-sections made of anisotropic material.}, language = {en} } @article{NeuJanserKhatibietal.2016, author = {Neu, Eugen and Janser, Frank and Khatibi, Akbar A. and Braun, Carsten and Orifici, Adrian C.}, title = {Operational Modal Analysis of a wing excited by transonic flow}, series = {Aerospace Science and Technology}, volume = {49}, journal = {Aerospace Science and Technology}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1270-9638}, doi = {10.1016/j.ast.2015.11.032}, pages = {73 -- 79}, year = {2016}, abstract = {Operational Modal Analysis (OMA) is a promising candidate for flutter testing and Structural Health Monitoring (SHM) of aircraft wings that are passively excited by wind loads. However, no studies have been published where OMA is tested in transonic flows, which is the dominant condition for large civil aircraft and is characterized by complex and unique aerodynamic phenomena. We use data from the HIRENASD large-scale wind tunnel experiment to automatically extract modal parameters from an ambiently excited wing operated in the transonic regime using two OMA methods: Stochastic Subspace Identification (SSI) and Frequency Domain Decomposition (FDD). The system response is evaluated based on accelerometer measurements. The excitation is investigated from surface pressure measurements. The forcing function is shown to be non-white, non-stationary and contaminated by narrow-banded transonic disturbances. All these properties violate fundamental OMA assumptions about the forcing function. Despite this, all physical modes in the investigated frequency range were successfully identified, and in addition transonic pressure waves were identified as physical modes as well. The SSI method showed superior identification capabilities for the investigated case. The investigation shows that complex transonic flows can interfere with OMA. This can make existing approaches for modal tracking unsuitable for their application to aircraft wings operated in the transonic flight regime. Approaches to separate the true physical modes from the transonic disturbances are discussed.}, language = {en} }