TY  - CHAP
A1  - Nakagawa, Masaki
A1  - Kallweit, Stephan
A1  - Michaux, Frank
A1  - Hojo, Teppei
T1  - Typical Velocity Fields and Vortical Structures around a Formula One Car, based on Experimental Investigations using Particle Image Velocimetry
T2  - SAE International Journal of Passenger Cars - Mechanical Systems
Y1  - 2016
U6  - https://doi.org/10.4271/2016-01-1611
SN  - 1946-4002
ER  - 
TY  - CHAP
A1  - Schneider, Dominik
A1  - Wisselink, Frank
A1  - Czarnecki, Christian
A1  - Nölle, Nikolai
T1  - Benefits and framework conditions for information-driven business models concerning the Internet of Things
T2  - Digitalization in companies
N2  - 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.
Y1  - 2024
SN  - 978-3-658-39093-8 (Print)
SN  - 978-3-658-39094-5 (eBook)
U6  - https://doi.org/10.1007/978-3-658-39094-5_5
SP  - 59
EP  - 75
PB  - Springer
CY  - Wiesbaden
ER  - 
TY  - JOUR
A1  - Bergmann, Ole
A1  - Möhren, Felix
A1  - Braun, Carsten
A1  - Janser, Frank
T1  - On the influence of elasticity on swept propeller noise
JF  - AIAA SCITECH 2023 Forum
N2  - 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.
Y1  - 2023
U6  - https://doi.org/10.2514/6.2023-0210
N1  - Session: Propeller, Open Rotor, and Rotorcraft Noise II

AIAA SCITECH 2023 Forum, 23-27 January 2023, National Harbor, MD & Online
PB  - AIAA
CY  - Reston, Va.
ER  - 
TY  - JOUR
A1  - Möhren, Felix
A1  - Bergmann, Ole
A1  - Janser, Frank
A1  - Braun, Carsten
T1  - Assessment of structural mechanical effects related to torsional deformations of propellers
JF  - CEAS Aeronautical Journal
N2  - 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.
KW  - Lifting propeller
KW  - Extension–twist coupling
KW  - Trapeze effect
KW  - Centrifugal twisting moment
Y1  - 2024
U6  - https://doi.org/10.1007/s13272-024-00737-7
SN  - 1869-5590 (eISSN)
SN  - 1869-5582
N1  - Corresponding author: Felix Möhren
PB  - Springer
CY  - Wien
ER  - 
TY  - JOUR
A1  - Neu, Eugen
A1  - Janser, Frank
A1  - Khatibi, Akbar A.
A1  - Braun, Carsten
A1  - Orifici, Adrian C.
T1  - Operational Modal Analysis of a wing excited by transonic flow
JF  - Aerospace Science and Technology
N2  - 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.
Y1  - 2016
U6  - https://doi.org/10.1016/j.ast.2015.11.032
SN  - 1270-9638
VL  - 49
SP  - 73
EP  - 79
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - CHAP
A1  - Ziolko, Christoph
A1  - Fricke, Barbara
A1  - Anthrakidis, Anette
A1  - Hoffschmidt, Bernhard
A1  - Dillig, Marius
A1  - Giese, Frank
A1  - Schwarzbözl, Peter
T1  - Ökobilanzielle Aspekte technologischer Entwicklungen des Solarturmkraftwerks
T2  - Forschung und Entwicklung für solarthermische Kraftwerke : 14. Kölner Sonnenkolloquium Mittwoch, 13. Juli 2011, im Auditorium des Campus Jülich der FH Aachen : Kurzfassungen der Vorträge und Poster
Y1  - 2011
SP  - 2 S.
PB  - DLR
CY  - Köln
ER  - 
TY  - CHAP
A1  - Mertens, Alexander
A1  - Pütz, Sebastian
A1  - Brauner, Philipp
A1  - Brillowski, Florian Sascha
A1  - Buczak, Nadine
A1  - Dammers, Hannah
A1  - van Dyck, Marc
A1  - Kong, Iris
A1  - Königs, Peter
A1  - Kortomeikel, Frauke Carole
A1  - Rodemann, Niklas
A1  - Schaar, Anne Kathrin
A1  - Steuer-Dankert, Linda
A1  - Wlecke, Shari
A1  - Gries, Thomas
A1  - Leicht-Scholten, Carmen
A1  - Nagel, Saskia K.
A1  - Piller, Frank Thomas
A1  - Schuh, Günther
A1  - Ziefle, Martina
A1  - Nitsch, Verena
T1  - Human digital shadow: Data-based modeling of users and usage in the internet of production
T2  - 14th Conference Human System Interaction Conference Proceedings
N2  - Digital Shadows as the aggregation, linkage and abstraction of data relating to physical objects are a central vision for the future of production. However, the majority of current research takes a technocentric approach, in which the human actors in production play a minor role. Here, the authors present an alternative anthropocentric perspective that highlights the potential and main challenges of extending the concept of Digital Shadows to humans. Following future research methodology, three prospections that illustrate use cases for Human Digital Shadows across organizational and hierarchical levels are developed: human-robot collaboration for manual work, decision support and work organization, as well as human resource management. Potentials and challenges are identified using separate SWOT analyses for the three prospections and common themes are emphasized in a concluding discussion.
KW  - digital shadow
KW  - cyber physical production system
KW  - user & usage
KW  - internet of production
Y1  - 2021
U6  - https://doi.org/10.1109/HSI52170.2021.9538729
N1  - 14th International Conference on Human System Interaction : 8-10 July 2021. Gdańsk, Poland
SP  - 1
EP  - 8
PB  - IEEE
ER  - 
TY  - JOUR
A1  - Ferrein, Alexander
A1  - Dylla, Frank
A1  - Lakemeyer, Gerhard
T1  - Specifying Multirobot Coordination in ICPGolog - From Simulation towards Real Robots / Dylla, Frank ; Ferrein, Alexander ; Lakemeyer, Gerhard
Y1  - 2003
N1  - AOS-4 at IJCAI-03
SP  - 1
EP  - 10
ER  - 
TY  - JOUR
A1  - Defosse, Jerome
A1  - Kleinschmidt, Joris
A1  - Schmutz, Axel
A1  - Loop, Torsten
A1  - Staat, Manfred
A1  - Gatzweiler, Karl-Heinz
A1  - Wappler, Frank
A1  - Schieren, Mark
T1  - Dental strain on maxillary incisors during tracheal intubation with double-lumen tubes and different laryngoscopy techniques - a blinded manikin study
JF  - Journal of Cardiothoracic and Vascular Anesthesia
KW  - anaesthetic complications
KW  - dental trauma
KW  - difficult airway
KW  - double-lumen tube intubation
KW  - videolaryngoscopy
Y1  - 2022
U6  - https://doi.org/10.1053/j.jvca.2022.02.017
SN  - 1053-0770
VL  - 36
IS  - 8, Part B
SP  - 3021
EP  - 3027
PB  - Elsevier
CY  - New York, NY
ER  - 
TY  - JOUR
A1  - Iken, Heiko
A1  - Bronder, Thomas
A1  - Goretzki, Alexander
A1  - Kriesel, Jana
A1  - Ahlborn, Kristina
A1  - Gerlach, Frank
A1  - Vonau, Winfried
A1  - Zander, Willi
A1  - Schubert, Jürgen
A1  - Schöning, Michael Josef
T1  - Development of a Combined pH- and Redox-Sensitive Bi-Electrode Glass Thin-Film Sensor
JF  - physica status solidi a : applications and materials sciences
Y1  - 2019
U6  - https://doi.org/10.1002/pssa.201900114
SN  - 1862-6319
VL  - 216
IS  - 12
SP  - 1
EP  - 8
PB  - Wiley
CY  - Weinheim
ER  - 
TY  - CHAP
A1  - Nees, Franz
A1  - Stengel, Ingo
A1  - Meister, Vera G.
A1  - Barton, Thomas
A1  - Herrmann, Frank
A1  - Müller, Christian
A1  - Wolf, Martin R.
T1  - Angewandte Forschung in der Wirtschaftsinformatik 2020 : Tagungsband zur 33. AKWI-Jahrestagung am 14.09.2020, ausgerichtet von der Hochschule Karlsruhe - Wirtschaft und Technik / hrsg. von Franz Nees, Ingo Stengel, Vera G. Meister, Thomas Barton, Frank Herrmann, Christian Müller, Martin R. Wolf
N2  - Tagungsbeiträge aus den Bereichen KI, Prozessorganisation und Plattformen für Geschäftsprozesse, Sicherheit und Datenschutz sowie Prototypen und Modelle.
Y1  - 2020
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:526-opus4-13840
SN  - 978-3-944330-66-2
N1  - 33. AKWI-Jahrestagung am 14.09.2020, ausgerichtet von der Hochschule Karlsruhe - Wirtschaft und Technik
PB  - mana-Buch
CY  - Heide
ER  - 
TY  - CHAP
A1  - Pütz, Sebastian
A1  - Baier, Ralph
A1  - Brauner, Philipp
A1  - Brillowski, Florian
A1  - Dammers, Hannah
A1  - Liehner, Luca
A1  - Mertens, Alexander
A1  - Rodemann, Niklas
A1  - Schneider, Sebastian
A1  - Schollemann, Alexander
A1  - Steuer-Dankert, Linda
A1  - Vervier, Luisa
A1  - Gries, Thomas
A1  - Leicht-Scholten, Carmen
A1  - Nagel, Saskia K.
A1  - Piller, Frank T.
A1  - Schuh, Günther
A1  - Ziefle, Martina
A1  - Nitsch, Verena
T1  - An interdisciplinary view on humane interfaces for digital shadows in the internet of production
T2  - 2022 15th International Conference on Human System Interaction (HSI)
N2  - Digital shadows play a central role for the next generation industrial internet, also known as Internet of Production (IoP). However, prior research has not considered systematically how human actors interact with digital shadows, shaping their potential for success. To address this research gap, we assembled an interdisciplinary team of authors from diverse areas of human-centered research to propose and discuss design and research recommendations for the implementation of industrial user interfaces for digital shadows, as they are currently conceptualized for the IoP. Based on the four use cases of decision support systems, knowledge sharing in global production networks, human-robot collaboration, and monitoring employee workload, we derive recommendations for interface design and enhancing workers’ capabilities. This analysis is extended by introducing requirements from the higher-level perspectives of governance and organization.
KW  - digital twin
KW  - digital shadow
KW  - cyber-physical production system
KW  - human-machine interface
Y1  - 2022
SN  - 978-1-6654-6823-7 (Print)
SN  - 978-1-6654-6822-0 (Online)
U6  - https://doi.org/10.1109/HSI55341.2022.9869467
SN  - 2158-2246 (Print)
SN  - 2158-2254 (Online)
N1  - 15th International Conference on Human System Interaction (HSI), 28-31 July 2022, Melbourne, Australia.
PB  - IEEE
ER  - 
TY  - CHAP
A1  - Dylla, Frank
A1  - Ferrein, Alexander
A1  - Lakemeyer, Gerhard
T1  - AllemaniACs 2003 team description
T2  - RoboCup 2003 : Robot Soccer World Cup VII
Y1  - 2003
SP  - 1
EP  - 3
ER  - 
TY  - CHAP
A1  - Mertens, Alexander
A1  - Brauner, Philipp
A1  - Baier, Ralph
A1  - Brillowski, Florian
A1  - Dammers, Hannah
A1  - van Dyck, Marc
A1  - Kong, Iris
A1  - Königs, Peter
A1  - Kordtomeikel, Frauke
A1  - Liehner, Gian Luca
A1  - Pütz, Sebastian
A1  - Rodermann, Niklas
A1  - Schaar, Anne Kathrin
A1  - Steuer-Dankert, Linda
A1  - Vervier, Luisa
A1  - Wlecke, Shari
A1  - Gries, Thomas
A1  - Leicht-Scholten, Carmen
A1  - Nagel, Saskia K.
A1  - Piller, Frank T.
A1  - Schuh, Günther
A1  - Ziefle, Martina
A1  - Nitsch, Verena
ED  - Michael, Judith
ED  - Pfeiffer, Jérôme
ED  - Wortmann, Andreas
T1  - Modelling Human Factors in Cyber Physical Production Systems by the Integration of Human Digital Shadows
T2  - Modellierung 2022 Satellite Events
N2  - The future of industrial manufacturing and production will increasingly manifest in the form of cyber-physical production systems. Here, Digital Shadows will act as mediators between the physical and digital world to model and operationalize the interactions and relationships between different entities in production systems. Until now, the associated concepts have been primarily pursued and implemented from a technocentric perspective, in which human actors play a subordinate role, if they are considered at all. This paper outlines an anthropocentric approach that explicitly considers the characteristics, behavior, and traits and states of human actors in socio-technical production systems. For this purpose, we discuss the potentials and the expected challenges and threats of creating and using Human Digital Shadows in production.
KW  - human digital shadow
KW  - cyber physical production system
KW  - human factors
Y1  - 2022
U6  - https://doi.org/10.18420/modellierung2022ws-018
N1  - Modellierung 2022, 27. Juni - 01. Juli 2022, Hamburg, Deutschland
SP  - 147
EP  - 149
PB  - GI Gesellschaft für Informatik
CY  - Bonn
ER  - 
TY  - JOUR
A1  - Schossig, Peter
A1  - Dötsch, Christian
A1  - Drück, Harald
A1  - Göttsche, Joachim
A1  - Huenges, Ernst
A1  - Kabus, Frank
A1  - Tamme, Rainer
T1  - Wärmespeicher für die Hausenergieversorgung
JF  - Wärme und Kälte - Energie aus Sonne und Erde : Jahrestagung des Forschungsverbunds Sonnenenergie in Kooperation mit der Landesinitiative Zukunftsenergie NRW / Stadermann, Gerd, Hrsg.
Y1  - 2005
UR  - http://publica.fraunhofer.de/documents/N-54108.html
SP  - 120
EP  - 125
PB  - Forschungsverbund Sonnenenergie
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Slabu, Ioana
A1  - Roeth, Anjali A.
A1  - Engelmann, Ulrich M.
A1  - Wiekhorst, Frank
A1  - Buhl, Eva M.
A1  - Neumann, Ulf P.
A1  - Schmitz-Rode, Thomas
T1  - Modeling of magnetoliposome uptake in human pancreatic tumor cells in vitro
JF  - Nanotechnology
Y1  - 2019
U6  - https://doi.org/10.1088/1361-6528/ab033e
SN  - 1361-6528
VL  - 30
IS  - 18
SP  - 184004
ER  - 
TY  - JOUR
A1  - Engelmann, Ulrich M.
A1  - Buhl, Eva Miriam
A1  - Draack, Sebastian
A1  - Viereck, Thilo
A1  - Frank, 
A1  - Schmitz-Rode, Thomas
A1  - Slabu, Ioana
T1  - Magnetic relaxation of agglomerated and immobilized iron oxide nanoparticles for hyperthermia and imaging applications
JF  - IEEE Magnetic Letters
N2  - Magnetic nanoparticles (MNPs) are used as therapeutic and diagnostic agents for local delivery of heat and image contrast enhancement in diseased tissue. Besides magnetization, the most important parameter that determines their performance for these applications is their magnetic relaxation, which can be affected when MNPs immobilize and agglomerate inside tissues. In this letter, we investigate different MNP agglomeration states for their magnetic relaxation properties under excitation in alternating fields and relate this to their heating efficiency and imaging properties. With focus on magnetic fluid hyperthermia, two different trends in MNP heating efficiency are measured: an increase by up to 23% for agglomerated MNP in suspension and a decrease by up to 28% for mixed states of agglomerated and immobilized MNP, which indicates that immobilization is the dominant effect. The same comparatively moderate effects are obtained for the signal amplitude in magnetic particle spectroscopy.
Y1  - 2018
U6  - https://doi.org/10.1109/LMAG.2018.2879034
SN  - 1949-307X
VL  - 9
IS  - Article number 8519617
PB  - IEEE
CY  - New York, NY
ER  - 
TY  - CHAP
A1  - Neu, Eugen
A1  - Janser, Frank
A1  - Khatibi, Akbar A.
A1  - Orifici, Adrian C.
T1  - In-flight vibration-based structural health monitoring of aircraft wings
T2  - 30th Congress of the internatonal council of the aeronautical sciences : 25.-30. September 2016, Daejeon, Korea
N2  - This work presents a methodology for automated
damage-sensitive feature extraction and anomaly
detection under multivariate operational variability
for in-flight assessment of wings. The
method uses a passive excitation approach, i. e.
without the need for artificial actuation. The
modal system properties (natural frequencies and
damping ratios) are used as damage-sensitive
features. Special emphasis is placed on the use
of Fiber Bragg Grating (FBG) sensing technology
and the consideration of Operational and
Environmental Variability (OEV). Measurements
from a wind tunnel investigation with a composite
cantilever equipped with FBG and piezoelectric
sensors are used to successfully detect an impact
damage. In addition, the feasibility of damage
localisation and severity estimation is evaluated
based on the coupling found between damageand
OEV-induced feature changes.
Y1  - 2016
ER  - 
TY  - CHAP
A1  - Kleine, Harald
A1  - Kallweit, Stephan
A1  - Michaux, Frank
A1  - Havermann, Marc
A1  - Olivier, Herbert
T1  - PIV Measurement of Shock Wave Diffraction
T2  - 18th International Symposium on Applications of Laser Techniques to Fluid Mechanics, 2016, Lissabon
Y1  - 2016
SP  - 1
EP  - 14
ER  - 
TY  - CHAP
A1  - Dinghofer, Kai
A1  - Hartung, Frank
T1  - Analysis of Criteria for the Selection of Machine Learning Frameworks
T2  - 2020 International Conference on Computing, Networking and Communications (ICNC)
N2  - With the many achievements of Machine Learning in the past years, it is likely that the sub-area of Deep Learning will continue to deliver major technological breakthroughs [1]. In order to achieve best results, it is important to know the various different Deep Learning frameworks and their respective properties. This paper provides a comparative overview of some of the most popular frameworks. First, the comparison methods and criteria are introduced and described with a focus on computer vision applications: Features and Uses are examined by evaluating papers and articles, Adoption and Popularity is determined by analyzing a data science study. Then, the frameworks TensorFlow, Keras, PyTorch and Caffe are compared based on the previously described criteria to highlight properties and differences. Advantages and disadvantages are compared, enabling researchers and developers to choose a framework according to their specific needs.
Y1  - 2020
U6  - https://doi.org/10.1109/ICNC47757.2020.9049650
N1  - 2020 International Conference on Computing, Networking and Communications (ICNC), 17-20 February 2020, Big Island, HI, USA
SP  - 373
EP  - 377
PB  - IEEE
CY  - New York, NY
ER  -