TY  - CHAP
A1  - Schmidt, Thomas
A1  - Kasch, Susanne
A1  - Eichler, Fabian
A1  - Thurn, Laura
T1  - Process strategies on laser-based melting of glass powder
T2  - LiM 2021 proceedings
N2  - This paper presents the laser-based powder bed fusion (L-PBF) using various glass powders (borosilicate and quartz glass). Compared to metals, these require adapted process strategies. First, the glass powders were characterized with regard to their material properties and their processability in the powder bed. This was followed by investigations of the melting behavior of the glass powders with different laser wavelengths (10.6 µm, 1070 nm). In particular, the experimental setup of a CO2 laser was adapted for the processing of glass powder. An experimental setup with integrated coaxial temperature measurement/control and an inductively heatable build platform was created. This allowed the L-PBF process to be carried out at the transformation temperature of the glasses. Furthermore, the component’s material quality was analyzed on three-dimensional test specimen with regard to porosity, roughness, density and geometrical accuracy in order to evaluate the developed L-PBF parameters and to open up possible applications.
KW  - 3D-printing
KW  - glass
KW  - additive manufactureing
KW  - laser based powder fusion
Y1  - 2021
N1  - LiM (Lasers in Manufacturing) 2021, June 21 - 24, 2021, online
ER  - 
TY  - CHAP
A1  - Rings, René
A1  - Ludowicy, Jonas
A1  - Finger, Felix
A1  - Braun, Carsten
A1  - Bil, Cees
T1  - Sensitivity Analysis of General Aviation Aircraft with Parallel Hybrid-Electric Propulsion Systems
T2  - Asia Pacific International Symposium on Aerospace Technology. APISAT 2019
Y1  - 2019
ER  - 
TY  - CHAP
A1  - Engel, Mareike
A1  - Thieringer, Julia
A1  - Tippkötter, Nils
T1  - Linking bioprocess engineering and electrochemistry for sustainable biofuel production
T2  - Young Researchers Symposium, YRS 2016. Proceedings
N2  - Electromicrobial engineering is an emerging, highly interdisciplinary research area linking bioprocesses with electrochemistry. In this work, microbial electrosynthesis (MES) of biobutanol is carried out during acetone-butanol-ethanol (ABE) fermentations with Clostridium acetobutylicum. A constant electric potential of −600mV (vs. Ag/AgCl) with simultaneous addition of the soluble redox mediator neutral red is used in order to study the electron transfer between the working electrode and the bacterial cells. The results show an earlier initiation of solvent production for all fermentations with applied potential compared to the conventional ABE fermentation. The f inal butanol concentration can be more than doubled by the application of a negative potential combined with addition of neutral red. Moreover a higher biofilm formation on the working electrode compared to control cultivations has been observed. In contrast to previous studies, our results also indicate that direct electron transfer (DET) might be possible with C. acetobutylicum. The presented results make microbial butanol production economically attractive and therefore support the development of sustainable production processes in the chemical industry aspired by the “Centre for resource-efficient chemistry and raw material change” as well as the the project “NanoKat” working on nanostructured catalysts in Kaiserslautern.
Y1  - 2016
N1  - Young Researchers Symposium, YRS 2016, 14th - 15th April 2016, Fraunhofer-Zentrum Kaiserslautern
SP  - 49
EP  - 53
PB  - Fraunhofer Verlag
CY  - Karlsruhe
ER  - 
TY  - CHAP
A1  - Tullis, Blake P.
A1  - Crookston, Brian M.
A1  - Bung, Daniel Bernhard
T1  - Weir head-discharge relationships: A multi-lab exercise
T2  - E-proceedings of the 38th IAHR World Congress  September 1-6, 2019, Panama City, Panama
Y1  - 2019
SP  - 1
EP  - 15
ER  - 
TY  - CHAP
A1  - Sauerborn, Markus
A1  - Klimek, J.
A1  - Hoffschmidt, Bernhard
A1  - Essen, H.
A1  - Sieger, S.
A1  - Biegel, G.
A1  - Göttsche, Joachim
A1  - Hilger, Patrick
T1  - Eurosun 2012 : radar technology for heliostat posititon control
T2  - Eurosun 2012 : Solar energy for a brighter future : conference proceedings : Rijeka, 18.-22.09.2012
Y1  - 2012
SP  - ID 80
CY  - Rijeka
ER  - 
TY  - CHAP
A1  - Duong, Minh Tuan
A1  - Nguyen, Nhu Hunyh
A1  - Staat, Manfred
T1  - Finite Element Implementation of a 3D Fung-type Model
T2  - ESMC-2012 - 8th European Solid Mechanics Conference, Graz, Austria, July 9-13, 2012
Y1  - 2012
SN  - 978-3-85125-223-1
PB  - Verlag d. Technischen Universität Graz
CY  - Graz
ER  - 
TY  - CHAP
A1  - Dachwald, Bernd
A1  - Mengali, Giovanni
A1  - Quarta, Alessandro A
A1  - Macdonald, Malcolm
A1  - McInnes, Colin R
T1  - Optical solar sail degradation modelling
T2  - 1st International Symposium on Solar Sailing
N2  - We propose a simple parametric OSSD model that describes the variation of the sail film's optical coefficients with time, depending on the sail film's environmental history, i.e., the radiation dose. The primary intention of our model is not to describe the exact behavior of specific film-coating combinations in the real space environment, but to provide a more general parametric framework for describing the general optical degradation behavior of solar sails.
Y1  - 2007
N1  - 1st International Symposium on Solar Sailing 27–29 June 2007, Herrsching, Germany
SP  - 1
EP  - 27
ER  - 
TY  - CHAP
A1  - Schildt, Philipp
A1  - Marzocca, Pier
A1  - Braun, Carsten
A1  - Dahmann, Peter
A1  - Keimer, Jona
T1  - Effects of atmospheric excitation on vibration based condition monitoring methods for hybrid-electric aircraft propulsion systems
T2  - AIAC 2018: 18th Australian International Aerospace Congress: HUMS - 11th Defence Science and Technology (DST) International Conference on Health and Usage Monitoring (HUMS 2019): ISSFD - 27th International Symposium on Space Flight Dynamics (ISSFD)
Y1  - 2019
SN  - 9781925627213
SP  - 923
EP  - 928
ER  - 
TY  - CHAP
A1  - Göttsche, Joachim
A1  - Schwarzer, Klemens
A1  - Röther, Sascha
A1  - Jellinghaus, Sabine
A1  - Helten, G.
A1  - Wittmann, R.
T1  - Efficient daylighting, heating and shading with rooflight heliostats
T2  - Renewables in a changing climate : from Nano to Urban Scale : CISBAT 2009 : 2-3 September 2009, EPFL, Lausanne, Switzerland : proceedings
Y1  - 2009
SP  - 243
EP  - 246
PB  - Ecole Polytechnique Fédérale de Lausanne
CY  - Lausanne
ER  - 
TY  - CHAP
A1  - Duran Paredes, Ludwin
A1  - Mottaghy, Darius
A1  - Herrmann, Ulf
A1  - Groß, Rolf Fritz
T1  - Online ground temperature and soil moisture monitoring of a shallow geothermal system with non-conventional components
T2  - EGU General Assembly 2020
N2  - We present first results from a newly developed monitoring station for a closed loop geothermal heat pump test installation at our campus, consisting of helix coils and plate heat exchangers, as well as an ice-store system. There are more than 40 temperature sensors and several soil moisture content sensors distributed around the system, allowing a detailed monitoring under different operating conditions.In the view of the modern development of renewable energies along with the newly concepts known as Internet of Things and Industry 4.0 (high-tech strategy from the German government), we created a user-friendly web application, which will connect the things (sensors) with the open network (www). Besides other advantages, this allows a continuous remote monitoring of the data from the numerous sensors at an arbitrary sampling rate.Based on the recorded data, we will also present first results from numerical simulations, taking into account all relevant heat transport processes.The aim is to improve the understanding of these processes and their influence on the thermal behavior of shallow geothermal systems in the unsaturated zone. This will in turn facilitate the prediction of the performance of these systems and therefore yield an improvement in their dimensioning when designing a specific shallow geothermal installation.
Y1  - 2020
N1  - EGU General Assembly 2020, Online, 4–8 May 2020
ER  - 
TY  - CHAP
A1  - Kronhardt, Valentina
A1  - Alexopoulos, Spiros
A1  - Reißel, Martin
A1  - Latzke, Markus
A1  - Rendon, C.
A1  - Sattler, Johannes Christoph
A1  - Herrmann, Ulf
T1  - Simulation of operational management for the Solar Thermal Test and Demonstration Power Plant Jülich using optimized control strategies of the storage system
T2  - Energy procedia
Y1  - 2015
SN  - 1876-6102
SP  - 1
EP  - 6
ER  - 
TY  - CHAP
A1  - Finger, Felix
A1  - Götten, Falk
A1  - Braun, Carsten
A1  - Bil, Cees
T1  - Mass, Primary Energy, and Cost - The Impact of Optimization Objectives on the Initial Sizing of Hybrid-Electric General Aviation Aircraft
T2  - Deutscher Luft- und Raumfahrtkongress 2019, DLRK 2019. Darmstadt, Germany
Y1  - 2019
U6  - https://doi.org/10.25967/490012
SP  - 1
EP  - 17
ER  - 
TY  - CHAP
A1  - Eggert, Mathias
T1  - Understanding the acceptance of smart home-based insurances
T2  - Proceedings of the 27th European Conference on Information Systems (ECIS), Stockholm & Uppsala, Sweden, June 8-14, 2019
Y1  - 2019
SN  - 978-1-7336325-0-8
SP  - 1
EP  - 15
ER  - 
TY  - CHAP
A1  - Baader, Fabian
A1  - Reiswich, M.
A1  - Bartsch, M.
A1  - Keller, D.
A1  - Tiede, E.
A1  - Keck, G.
A1  - Demircian, A.
A1  - Friedrich, M.
A1  - Dachwald, Bernd
A1  - Schüller, K.
A1  - Lehmann, R.
A1  - Chojetzki, R.
A1  - Durand, C.
A1  - Rapp, L.
A1  - Kowalski, Julia
A1  - Förstner, R.
T1  - VIPER - Student research on extraterrestrical ice penetration technology
T2  - Proceedings of the 2nd Symposium on Space Educational Activities
N2  - Recent analysis of scientific data from Cassini and earth-based observations gave evidence for a global ocean under a surrounding solid ice shell on Saturn's moon Enceladus. Images of Enceladus' South Pole showed several fissures in the ice shell with plumes constantly exhausting frozen water particles, building up the E-Ring, one of the outer rings of Saturn. In this southern region of Enceladus, the ice shell is considered to be as thin as 2 km, about an order of magnitude thinner than on the rest of the moon. Under the ice shell, there is a global ocean consisting of liquid water. Scientists are discussing different approaches the possibilities of taking samples of water, i.e. by melting through the ice using a melting probe. FH Aachen UAS developed a prototype of maneuverable melting probe which can navigate through the ice that has already been tested successfully in a terrestrial environment. This means no atmosphere and or ambient pressure, low ice temperatures of around 100 to 150K (near the South Pole) and a very low gravity of 0,114 m/s^2 or 1100 μg. Two of these influencing measures are about to be investigated at FH Aachen UAS in 2017, low ice temperature and low ambient pressure below the triple point of water. Low gravity cannot be easily simulated inside a large experiment chamber, though. Numerical simulations of the melting process at RWTH Aachen however are showing a gravity dependence of melting behavior. Considering this aspect, VIPER provides a link between large-scale experimental simulations at FH Aachen UAS and numerical simulations at RWTH Aachen. To analyze the melting process, about 90 seconds of experiment time in reduced gravity and low ambient pressure is provided by the REXUS rocket. In this time frame, the melting speed and contact force between ice and probes are measured, as well as heating power and a two-dimensional array of ice temperatures. Additionally, visual and infrared cameras are used to observe the melting process.
Y1  - 2018
SP  - 1
EP  - 6
ER  - 
TY  - CHAP
A1  - Schiffer, Stefan
A1  - Ferrein, Alexander
A1  - Lakemeyer, Gerhard
T1  - Fuzzy representations and control for domestic service robots in Golog
T2  - Intelligent robotics and applications : 4th International conference, ICIRA 2011, Aachen, Germany, December 6-8, 2011, proceedings, part I. (Lecture notes in computer science ; 7102)
Y1  - 2011
SN  - 978-3-642-25486-4
SP  - 241
EP  - 250
ER  - 
TY  - CHAP
A1  - Dersch, Jürgen
A1  - Geyer, Michael
A1  - Herrmann, Ulf
A1  - Jones, Scott A.
A1  - Kelly, Bruce
A1  - Kistner, Rainer
A1  - Ortmanns, Winfried
A1  - Pitz-Paal, Robert
A1  - Price, Henry
ED  - Pearson, J. Boise
T1  - Solar Trough Integration Into Combined Cycle Systems
T2  - Solar engineering 2002 : proceedings of the International Solar Energy Conference ; presented at the 2002 International Solar Energy Conference, a part of Solar 2002 - Sunrise on the Reliable Energy Economy, June 15 - 20, 2002, Reno, Nevada
Y1  - 2002
SN  - 0-7918-1689-3
U6  - https://doi.org/doi:10.1115/SED2002-1072
SP  - 351
EP  - 359
PB  - ASME
ER  - 
TY  - CHAP
A1  - Ahmed, H.
A1  - Schlenkhoff, A.
A1  - Bung, Daniel Bernhard
T1  - Hydrodynamic characteristics of vertical slotted wall breakwaters
T2  - Balance and uncertainty - water in a changing world :  proceedings of the 34th IAHR world congress ; 33rd Hydrology and Water Resources Symposium ; 10th Conference on Hydraulics in Water Engineering ; 26 June - 1 July 2011, Brisbane, Australia
Y1  - 2011
SN  - 978-0-85825-868-6
SP  - 1179
EP  - 1186
ER  - 
TY  - CHAP
A1  - Steuer-Dankert, Linda
A1  - Leicht-Scholten, Carmen
T1  - Innovation and Diversity : Integrating new perspectives into research associations
T2  - 12th European Conference on Innovation and Entrepreneurship (ECIE 2017) : Paris, France, 21-22 September 2017
N2  - The link between diversity and innovation is broadly discussed in the context of research and innovation processes. Many institutions and enterprises, specifically in commerce, have already tried to establish sustainable diversity management concepts, in order to increase the diversity of their workforce in addition to establishing a corporate culture of openness. Alongside the creation of a working place where different experiences and skills are valued equally, the entrepreneurial intention is to transfer diversity into economically relevant advantages. Taking into account the potential of diversity in research and innovation processes, the project “Diversity- and Innovation Management” was incorporated within a large interdisciplinary research Cluster. The project’s purpose was to study the context between diversity and innovation in research associations and to later develop a customised management concept into an interdisciplinary research Cluster on integrative production technology with full integration. The challenge of such research associations lays in an organisational structure which is often described as being decentralised. Researchers coming from different academic disciplines, while having diverse habits, conduct research on large scientific issues and challenges. In addition, these researchers are socialised in different institutions and university chairs. Theses differences in leadership styles, business cultures and organisational strategies, follow into their research team work. Taking a closer look into the management of human resources suggests that decentral organised recruitment processes, as well as allocation of human resources, lead to a lacking overview in regard to missing competencies, perspectives and backgrounds in research networks. These circumstances are comparable to big corporate groups. While developing a management concept for research associations, these characteristics must be considered. To ensure this, the project follows a human-centred approach, which considers top-down, as well as bottom-up perspectives. This paper presents the applied mixed-method approach in the scientific issue described above. In the frame of the Cluster of Excellence “Integrative Production Technology for High-Wage Countries” research results based on quantitative, as well as qualitative studies, were presented as an application example. This paper provides a new perspective on the innovation and diversity context. Against the background of complex research organisations, the development approach of a management concept is particularly interesting.
KW  - Innovation
KW  - Diversity
KW  - Innovation Management
KW  - Diversity Management
KW  - Leadership
Y1  - 2017
SN  - 978-1-911218-54-8
SP  - 767
EP  - 776
ER  - 
TY  - CHAP
A1  - Simsek, Beril
A1  - Krause, Hans-Joachim
A1  - Engelmann, Ulrich M.
ED  - Digel, Ilya
ED  - Staat, Manfred
ED  - Trzewik, Jürgen
ED  - Sielemann, Stefanie
ED  - Erni, Daniel
ED  - Zylka, Waldemar
T1  - Magnetic biosensing with magnetic nanoparticles: Simulative approach to predict signal intensity in frequency mixing magnetic detection
T2  - YRA MedTech Symposium (2024)
N2  - Magnetic nanoparticles (MNP) are investigated with great interest for biomedical applications in diagnostics (e.g. imaging: magnetic particle imaging (MPI)), therapeutics (e.g. hyperthermia: magnetic fluid hyperthermia (MFH)) and multi-purpose biosensing (e.g. magnetic immunoassays (MIA)). What all of these applications have in common is that they are based on the unique magnetic relaxation mechanisms of MNP in an alternating magnetic field (AMF). While MFH and MPI are currently the most prominent examples of biomedical applications, here we present results on the relatively new biosensing application of frequency mixing magnetic detection (FMMD) from a simulation perspective. In general, we ask how the key parameters of MNP (core size and magnetic anisotropy) affect the FMMD signal: by varying the core size, we investigate the effect of the magnetic volume per MNP; and by changing the effective magnetic anisotropy, we study the MNPs’ flexibility to leave its preferred magnetization direction. From this, we predict the most effective combination of MNP core size and magnetic anisotropy for maximum signal generation.
Y1  - 2024
SN  - 978-3-940402-65-3
U6  - https://doi.org/10.17185/duepublico/81475
N1  - 4th YRA MedTech Symposium, February 1, 2024. FH Aachen, Campus Jülich
SP  - 27
EP  - 28
PB  - Universität Duisburg-Essen
CY  - Duisburg
ER  - 
TY  - CHAP
A1  - Schmitz, Annika
A1  - Apandi, Shah Eiman Amzar Shah
A1  - Spillner, Jan
A1  - Hima, Flutura
A1  - Behbahani, Mehdi
ED  - Digel, Ilya
ED  - Staat, Manfred
ED  - Trzewik, Jürgen
ED  - Sielemann, Stefanie
ED  - Erni, Daniel
ED  - Zylka, Waldemar
T1  - Effect of different cannula positions in the pulmonary artery on blood flow and gas exchange using computational fluid dynamics analysis
T2  - YRA MedTech Symposium (2024)
N2  - Pulmonary arterial cannulation is a common and effective method for percutaneous mechanical circulatory support for concurrent right heart and respiratory failure [1]. However, limited data exists to what effect the positioning of the cannula has on the oxygen perfusion throughout the pulmonary artery (PA). This study aims to evaluate, using computational fluid dynamics (CFD), the effect of different cannula positions in the PA with respect to the oxygenation of the different branching vessels in order for an optimal cannula position to be determined. The four chosen different positions (see Fig. 1) of the cannulas are, in the lower part of the main pulmonary artery (MPA), in the MPA at the junction between the right pulmonary artery (RPA) and the left pulmonary artery (LPA), in the RPA at the first branch of the RPA and in the LPA at the first branch of the LPA.
Y1  - 2024
SN  - 978-3-940402-65-3
U6  - https://doi.org/10.17185/duepublico/81475
N1  - 4th YRA MedTech Symposium, February 1, 2024. FH Aachen, Campus Jülich
SP  - 29
EP  - 30
PB  - Universität Duisburg-Essen
CY  - Duisburg
ER  -