TY  - JOUR
A1  - Tran, Duc Hung
A1  - Ebeling, Felix
T1  - Die risikoadäquate Bestimmung von Eigenkapitalkosten bei konzerninternen Routinefunktionen
JF  - Der Betrieb
N2  - Eigenkapitalkosten sind eine wesentliche Determinante bei der Wertbestimmung von Unternehmen und Unternehmensteilen. Die Eigenkapitalkosten werden regelmäßig mittels des CAPM bestimmt. Für sog. konzerninterne Routinefunktionen mit geringem Risiko stellt diese Bestimmung mittels CAPM ein Problem dar, da börsennotierte Peergroups für eine zuverlässige Bestimmung des Beta-Faktors meist nicht identifizierbar sind. Damit ergeben sich bei Bewertungen von Routineunternehmen Unsicherheiten und Konfliktpotenzial in steuerlichen Betriebsprüfungen. Dieser Beitrag gibt einen Überblick der in der Praxis genutzten Ansätze und stellt eine theoretische Fundierung zur Bestimmung der Eigenkapitalkosten von konzerninternen Routinefunktionen vor. Dabei wird verdeutlicht, dass Eigenkapitalkosten von konzerninternen Routinefunktionen nicht denen des Gesamtkonzerns entsprechen und Praktikeransätze eine grundsätzliche Berechtigung besitzen.
Y1  - 2021
SN  - 0005-9935
VL  - 74
IS  - 29
SP  - 1553
EP  - 1560
ER  - 
TY  - CHAP
A1  - Hoegen, Anne von
A1  - Doncker, Rik W. De
A1  - Bragard, Michael
A1  - Hoegen, Svenja von
T1  - Problem-based learning in automation engineering: performing a remote laboratory aession aerving various educational attainments
T2  - 2021 IEEE Global Engineering Education Conference (EDUCON)
N2  - During the Covid-19 pandemic, vocational colleges, universities of applied science and technical universities often had to cancel laboratory sessions requiring students’ attendance. These above of all are of decisive importance in order to give learners an understanding of theory through practical work.This paper is a contribution to the implementation of distance learning for laboratory work applicable for several upper secondary educational facilities. Its aim is to provide a paradigm for hybrid teaching to analyze and control a non-linear system depicted by a tank model. For this reason, we redesign a full series of laboratory sessions on the basis of various challenges. Thus, it is suitable to serve different reference levels of the European Qualifications Framework (EQF).We present problem-based learning through online platforms to compensate the lack of a laboratory learning environment. With a task deduced from their future profession, we give students the opportunity to develop own solutions in self-defined time intervals. A requirements specification provides the framework conditions in terms of time and content for students having to deal with the challenges of the project in a self-organized manner with regard to inhomogeneous previous knowledge. If the concept of Complete Action is introduced in classes before, they will automatically apply it while executing the project.The goal is to combine students’ scientific understanding with a procedural knowledge. We suggest a series of remote laboratory sessions that combine a problem formulation from the subject area of Measurement, Control and Automation Technology with a project assignment that is common in industry by providing extracts from a requirements specification.
Y1  - 2021
U6  - https://doi.org/10.1109/EDUCON46332.2021.9453925
N1  - 2021 IEEE Global Engineering Education Conference (EDUCON), 21-23 April 2021, Vienna, Austria
SP  - 1605
EP  - 1614
PB  - IEEE
CY  - New York, NY
ER  - 
TY  - CHAP
A1  - Hüning, Felix
A1  - Stüttgen, Marcel
T1  - Work in Progress: Interdisciplinary projects in times of COVID-19 crisis – challenges, risks and chances
T2  - 2021 IEEE Global Engineering Education Conference (EDUCON)
N2  - Project work and inter disciplinarity are integral parts of today's engineering work. It is therefore important to incorporate these aspects into the curriculum of academic studies of engineering. At the faculty of Electrical Engineering and Information Technology an interdisciplinary project is part of the bachelor program to address these topics. Since the summer term 2020 most courses changed to online mode during the Covid-19 crisis including the interdisciplinary projects. This online mode introduces additional challenges to the execution of the projects, both for the students as well as for the lecture. The challenges, but also the risks and chances of this kind of project courses are subject of this paper, based on five different interdisciplinary projects
Y1  - 2021
U6  - https://doi.org/10.1109/EDUCON46332.2021.9454006
N1  - 2021 IEEE Global Engineering Education Conference (EDUCON), 21-23 April 2021, Vienna, Austria
SP  - 1175
EP  - 1179
PB  - IEEE
CY  - New York, NY
ER  - 
TY  - JOUR
A1  - Hugenroth, Kristin
A1  - Borchardt, Ralf
A1  - Ritter, Philine
A1  - Groß‑Hardt, Sascha
A1  - Meyns, Bart
A1  - Verbelen, Tom
A1  - Steinseifer, Ulrich
A1  - Kaufmann, Tim A. S.
A1  - Engelmann, Ulrich M.
T1  - Optimizing cerebral perfusion and hemodynamics during cardiopulmonary bypass through cannula design combining in silico, in vitro and in vivo input
JF  - Scientific Reports
N2  - Cardiopulmonary bypass (CPB) is a standard technique for cardiac surgery, but comes with the risk of severe neurological complications (e.g. stroke) caused by embolisms and/or reduced cerebral perfusion. We report on an aortic cannula prototype design (optiCAN) with helical outflow and jet-splitting dispersion tip that could reduce the risk of embolic events and restores cerebral perfusion to 97.5% of physiological flow during CPB in vivo, whereas a commercial curved-tip cannula yields 74.6%. In further in vitro comparison, pressure loss and hemolysis parameters of optiCAN remain unaffected. Results are reproducibly confirmed in silico for an exemplary human aortic anatomy via computational fluid dynamics (CFD) simulations. Based on CFD simulations, we firstly show that optiCAN design improves aortic root washout, which reduces the risk of thromboembolism. Secondly, we identify regions of the aortic intima with increased risk of plaque release by correlating areas of enhanced plaque growth and high wall shear stresses (WSS). From this we propose another easy-to-manufacture cannula design (opti2CAN) that decreases areas burdened by high WSS, while preserving physiological cerebral flow and favorable hemodynamics. With this novel cannula design, we propose a cannulation option to reduce neurological complications and the prevalence of stroke in high-risk patients after CPB.
Y1  - 2021
U6  - https://doi.org/10.1038/s41598-021-96397-2
SN  - 2045-2322
VL  - 11
IS  - Art. No. 16800
SP  - 1
EP  - 12
PB  - Springer
CY  - Berlin
ER  - 
TY  - CHAP
A1  - Merkens, Torsten
A1  - Hebel, Christoph
T1  - Sharing mobility concepts – flexible, sustainable, smart
T2  - Proceedings of the 1st UNITED – Southeast Asia Automotive Interest Group (SAIG) International Conference
KW  - Sharing mobility
KW  - electro mobility
KW  - business models
KW  - mobility behaviour
Y1  - 2021
SN  - 978-3-902103-94-9
N1  - 1st UNITED-SAIG International Conference, 21-22 APR 2021, Chulalongkorn University, Thailand
SP  - 43
EP  - 44
ER  - 
TY  - JOUR
A1  - Brockhaus, Moritz K.
A1  - Behbahani, Mehdi
A1  - Muris, Farina
A1  - Jansen, Sebastian V.
A1  - Schmitz- Rode, Thomas
A1  - Steinseifer, Ulrich
A1  - Clauser, Johanna C.
T1  - In vitro thrombogenicity testing of pulsatile mechanical circulatory support systems: Design and proof-of-concept
JF  - Artificial Organs
N2  - Thrombogenic complications are a main issue in mechanical circulatory support (MCS). There is no validated in vitro method available to quantitatively assess the thrombogenic performance of pulsatile MCS devices under realistic hemodynamic conditions. The aim of this study is to propose a method to evaluate the thrombogenic potential of new designs without the use of complex in-vivo trials. This study presents a novel in vitro method for reproducible thrombogenicity testing of pulsatile MCS systems using low molecular weight heparinized porcine blood. Blood parameters are continuously measured with full blood thromboelastometry (ROTEM; EXTEM, FIBTEM and a custom-made analysis HEPNATEM). Thrombus formation is optically observed after four hours of testing. The results of three experiments are presented each with two parallel loops. The area of thrombus formation inside the MCS device was reproducible. The implantation of a filter inside the loop catches embolizing thrombi without a measurable increase of platelet activation, allowing conclusions of the place of origin of thrombi inside the device. EXTEM and FIBTEM parameters such as clotting velocity (α) and maximum clot firmness (MCF) show a total decrease by around 6% with a characteristic kink after 180 minutes. HEPNATEM α and MCF rise within the first 180 minutes indicate a continuously increasing activation level of coagulation. After 180 minutes, the consumption of clotting factors prevails, resulting in a decrease of α and MCF. With the designed mock loop and the presented protocol we are able to identify thrombogenic hot spots inside a pulsatile pump and characterize their thrombogenic potential.
Y1  - 2021
U6  - https://doi.org/10.1111/aor.14046
SN  - 1525-1594
VL  - 45
IS  - 12
SP  - 1513
EP  - 1521
PB  - Wiley
CY  - Weinheim
ER  - 
TY  - CHAP
A1  - Olderog, M.
A1  - Mohr, P.
A1  - Beging, Stefan
A1  - Tsoumpas, C.
A1  - Ziemons, Karl
T1  - Simulation study on the role of tissue-scattered events in improving sensitivity for a compact time of flight compton positron emission tomograph
T2  - 2020 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)
N2  - In positron emission tomography improving time, energy and spatial detector resolutions and using Compton kinematics introduces the possibility to reconstruct a radioactivity distribution image from scatter coincidences, thereby enhancing image quality. The number of single scattered coincidences alone is in the same order of magnitude as true coincidences. In this work, a compact Compton camera module based on monolithic scintillation material is investigated as a detector ring module. The detector interactions are simulated with Monte Carlo package GATE. The scattering angle inside the tissue is derived from the energy of the scattered photon, which results in a set of possible scattering trajectories or broken line of response. The Compton kinematics collimation reduces the number of solutions. Additionally, the time of flight information helps localize the position of the annihilation. One of the questions of this investigation is related to how the energy, spatial and temporal resolutions help confine the possible annihilation volume. A comparison of currently technically feasible detector resolutions (under laboratory conditions) demonstrates the influence on this annihilation volume and shows that energy and coincidence time resolution have a significant impact. An enhancement of the latter from 400 ps to 100 ps leads to a smaller annihilation volume of around 50%, while a change of the energy resolution in the absorber layer from 12% to 4.5% results in a reduction of 60%. The inclusion of single tissue-scattered data has the potential to increase the sensitivity of a scanner by a factor of 2 to 3 times. The concept can be further optimized and extended for multiple scatter coincidences and subsequently validated by a reconstruction algorithm.
Y1  - 2021
SN  - 978-1-7281-7693-2
U6  - https://doi.org/10.1109/NSS/MIC42677.2020.9507901
N1  - 2020 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), 31 Oct.-7 Nov. 2020, Boston, MA, USA
PB  - IEEE
CY  - New York, NY
ER  - 
TY  - CHAP
A1  - Ulmer, Jessica
A1  - Braun, Sebastian
A1  - Cheng, Chi-Tsun
A1  - Dowey, Steve
A1  - Wollert, Jörg
T1  - Simulation und Verifikation komplexer Handarbeitsprozesse durch die Kombination von Virtual Reality und Augmented Reality im Single-Piece-Workflow
T2  - Tagungsband: AALE 2020
Y1  - 2020
SN  - 978-3-8007-5180-8
N1  - AALE 2020 - 17. Fachkonferenz, Automatisierung und Mensch-Technik-Interaktion, 04.03.2020 - 06.03.2020 in Leipzig, Deutschland
ER  - 
TY  - BOOK
A1  - Schmidt, Bernd
T1  - Grundlagen der Elektrotechnik und Elektronik für Ingenieure der Schienenfahrzeugtechnik und anderer Fachrichtungen : neu mit neuem SI-System und weiteren Inhalten für Mechantroniker
KW  - Elektrotechnik
KW  - Elektronik
Y1  - 2019
SN  - 978-3-944131-04-7
PB  - B. Schmidt, Fachverlag für Elektro- und Informationstechnik
CY  - Bielefeld
ET  - 3. vollständig überarbeitete Auflage
ER  - 
TY  - CHAP
A1  - Adams, Moritz
A1  - Losekamm, Martin J.
A1  - Czupalla, Markus
T1  - Development of the Thermal Control System for the RadMap Telescope Experiment on the International Space Station
T2  - International Conference on Environmental Systems
Y1  - 2020
N1  - 2020 International Conference on Environmental Systems, 12. Juli 2020 – 16. Juli 2020, Lissabon
SP  - 1
EP  - 10
ER  - 
TY  - RPRT
A1  - Artmann, Gerhard
T1  - Escherichia Coli Infektion und Zellschädigung - Wie perfekt wirken Antibiotika? : Abschlussbericht zum Projekt 1703701
Y1  - 2004
U6  - https://doi.org/10.2314/GBV:482527137
PB  - Technische Informationsbibliothek u. Universitätsbibliothek
CY  - Jülich
ER  - 
TY  - RPRT
A1  - Artmann, Gerhard
T1  - Plant mutant scanner : Hochdurchsatzscanner zur Charakterisierung von Pflanzenmutanten.  Abschlussbericht ; FHprofUnd ; PhytoScan ; Laufzeit des Vorhabens: 01.07.2008 - 30.06.2011
Y1  - 2011
U6  - https://doi.org/10.2314/GBV:747569150
N1  - Förderkennzeichen BMBF 1736X08
PB  - Technische Informationsbibliothek u. Universitätsbibliothek
CY  - Aachen
ER  - 
TY  - RPRT
A1  - Artmann, Gerhard
A1  - Bäumler, H.
T1  - Pharmamikrocontainer mit designgesteuerter Permeabilität als Transporter für ausgewählte Pharmaka.  Ein Gemeinschaftsprojekt im Forschungsschwerpunkt "Celluar Engineering"  [Laufzeit: 01.09.2000 - 28.02.2002]
Y1  - 2002
PB  - FH Aachen
CY  - Jülich
ER  - 
TY  - RPRT
A1  - Temiz Artmann, Aysegül
T1  - Frühgeburtenrate mindern durch ein Prognoseverfahren für den vorzeitigen Blasensprung - PROMPT (Premature rupture of membranes prediction test) : Abschlussbericht ; Laufzeit des Vorhabens: 01.03.2007 - 31.12.2009
Y1  - 2010
U6  - https://doi.org/10.2314/GBV:644277858
N1  - Förderkennzeichen BMBF 1772X07
PB  - Technische Informationsbibliothek u. Universitätsbibliothek
CY  - Aachen
ER  - 
TY  - JOUR
A1  - Arampatzis, Adamantios
A1  - Karamanidis, Kiros
A1  - Albracht, Kirsten
T1  - Adaptational responses of the human Achilles tendon by modulation of the applied cyclic strain magnitude
JF  - Journal of Experimental Biology
Y1  - 2007
U6  - https://doi.org/10.1242/jeb.003814
SN  - 0022-0949
VL  - 210
IS  - 15
SP  - 2743
EP  - 2753
ER  - 
TY  - JOUR
A1  - Albracht, Kirsten
A1  - Arampatzis, Adamantios
T1  - Influence of the mechanical properties of the muscle-tendon unit on force generation in runners with different running economy
JF  - Biological Cybernetics
Y1  - 2006
U6  - https://doi.org/10.1007/s00422-006-0070-z
SN  - 1432-0770
VL  - 95
IS  - 1
SP  - 87
EP  - 96
ER  - 
TY  - CHAP
A1  - Abel, Thomas
A1  - Bonin, Dominik
A1  - Albracht, Kirsten
A1  - Zeller, Sebastian
A1  - Burkett, Brendan
T1  - Kinematische Untersuchung der Kurbelbewegung im Handcycling: Entwicklung einer sportartspezifischen Methode
T2  - Behindertensport 1951-2011 : Historische und aktuelle Aspekte im nationalen und internationalen Dialog
Y1  - 2015
SN  - 9783898997249
SP  - 82
EP  - 91
PB  - Meyer & Meyer
CY  - Aachen
ER  - 
TY  - CHAP
A1  - Kolditz, Melanie
A1  - Albin, Thivaharan
A1  - Albracht, Kirsten
A1  - Brüggemann, Gert-Peter
A1  - Abel, Dirk
T1  - Isokinematic leg extension training with an industrial robot
T2  - 6th IEEE RAS/EMBS International Conference on Biomedical Robotics and Biomechatronics (BioRob) June 26-29, 2016. UTown, Singapore
Y1  - 2016
U6  - https://doi.org/10.1109/BIOROB.2016.7523750
SP  - 950
EP  - 955
ER  - 
TY  - CHAP
A1  - Bitz, Andreas
A1  - Streckert, J.
A1  - Hansen, V.W.
A1  - Buschmann, J.
T1  - RF exposure of non restrained animals in an overmoded radial waveguide
T2  - 22nd BEMS Annual Meeting, Munich, Germany, 2000
Y1  - 2000
SP  - 63
PB  - Bioelectromagnetics Society
CY  - Frederick, MD
ER  - 
TY  - JOUR
A1  - Sousa, Marcos A. M.
A1  - Siqueira, Jose R. Jr.
A1  - Vercik, Andres
A1  - Schöning, Michael Josef
A1  - Oliveira, Osvaldo N. Jr.
T1  - Determining the optimized layer-by-layer film architecture with dendrimer/carbon nanotubes for field-effect sensors
JF  - IEEE Sensors Journal
N2  - The capacitive electrolyte–insulator–semiconductor (EIS) structure is a typical device based on a field-effect sensor platform. With a simple silicon-based structure, EIS have been useful for several sensing applications, especially with incorporation of nanostructured films to modulate the ionic transport and the flat-band potential. In this paper, we report on ion transport and changes in flat-band potential in EIS sensors made with layer-by-layer films containing poly(amidoamine) (PAMAM) dendrimer and single-walled carbon nanotubes (SWNTs) adsorbed on p-Si/SiO 2 /Ta 2 O 5 chips with an Al ohmic contact. The impedance spectra were fitted using an equivalent circuit model, from which we could determine parameters such as the double-layer capacitance. This capacitance decreased with the number of bilayers owing to space charge accumulated at the electrolyte–insulator interface, up to three PAMAM/SWNTs bilayers, after which it stabilized. The charge-transfer resistance was also minimum for three bilayers, thus indicating that this is the ideal architecture for an optimized EIS performance. The understanding of the influence of nanostructures and the fine control of operation parameters pave the way for optimizing the design and performance of new EIS sensors.
Y1  - 2017
U6  - https://doi.org/10.1109/JSEN.2017.2653238
SN  - 1558-1748
VL  - 17
IS  - 6
SP  - 1735
EP  - 1740
PB  - IEEE
CY  - New York
ER  -