TY - CHAP
A1 - Bornheim, Tobias
A1 - Grieger, Niklas
A1 - Bialonski, Stephan
T1 - FHAC at GermEval 2021: Identifying German toxic, engaging, and fact-claiming comments with ensemble learning
T2 - Proceedings of the GermEval 2021 Workshop on the Identification of Toxic, Engaging, and Fact-Claiming Comments : 17th Conference on Natural Language Processing KONVENS 2021
Y1 - 2021
U6 - https://doi.org/10.48415/2021/fhw5-x128
N1 - KONVENS (Konferenz zur Verarbeitung natürlicher Sprache/Conference on Natural Language Processing) 2021, 6. - 9. September 2021, Düsseldorf
SP - 105
EP - 111
PB - Heinrich Heine University
CY - Düsseldorf
ER -
TY - CHAP
A1 - Digel, Ilya
A1 - Demirci, Taylan
A1 - Trzewik, Jürgen
A1 - Linder, Peter
A1 - Temiz Artmann, Aysegül
T1 - Fibroblast response to mechanical stress: role of the adhesion substrate : [abstract]
N2 - Mechanical stimulation of the cells resulted in evident changes in the cell morphology, protein composition and gene expression. Microscopically, additional formation of stress fibers accompanied by cell re-arrangements in a monolayer was observed. Also, significant activation of p53 gene was revealed as compared to control. Interestingly, the use of CellTech membrane coating induced cell death after mechanical stress had been applied. Such an effect was not detected when fibronectin had been used as an adhesion substrate.
KW - Fibroblast
KW - Mechanische Beanspruchung
KW - celldrum technology
Y1 - 2004
ER -
TY - JOUR
A1 - Schütz, S.
A1 - Weißbecker, B.
A1 - Hummel, Hans E.
A1 - Schöning, Michael Josef
A1 - Riemer, A.
A1 - Kordos, P.
A1 - Lüth, H.
T1 - Field effect transistor-insect antenna junction
JF - Naturwissenschaften
Y1 - 1997
SN - 1432-1904
VL - 84
SP - 86
EP - 88
ER -
TY - JOUR
A1 - McArdell, Brian W.
A1 - Bartelt, Perry
A1 - Kowalski, Julia
T1 - Field observations of basal forces and fluid pore pressure in a debris flow
JF - Geophysical Research Letters (GRL)
N2 - Using results from an 8 m2 instrumented force plate we describe field measurements of normal and shear stresses, and fluid pore pressure for a debris flow. The flow depth increased from 0.1 to 1 m within the first 12 s of flow front arrival, remained relatively constant until 100 s, and then gradually decreased to 0.5 m by 600 s. Normal and shear stresses and pore fluid pressure varied in-phase with the flow depth. Calculated bulk densities are ρb = 2000–2250 kg m−3 for the bulk flow and ρf = 1600–1750 kg m−3 for the fluid phase. The ratio of effective normal stress to shear stress yields a Coulomb basal friction angle of ϕ = 26° at the flow front. We did not find a strong correlation between the degree of agitation in the flow, estimated using the signal from a geophone on the force plate, and an assumed dynamic pore fluid pressure. Our data support the idea that excess pore-fluid pressures are long lived in debris flows and therefore contribute to their unusual mobility.
KW - debris flow
Y1 - 2007
SN - 0094-8276
VL - 34
IS - 7
ER -
TY - JOUR
A1 - Schwarzer, Klemens
A1 - Vieira da Silva, Maria Eugenia
A1 - Schwarzer, Tarik
T1 - Field results in Namibia and Brazil of the new solar desalination system for decentralised drinking water production
JF - Desalination and water treatment. Vol. 31 (2011), iss. 1-3: selected papers presented at EuroMed 2010 — Desalination for Clean Water and Energy: Cooperation among Mediterranean Countries of Europe and MENA Region, 3–7 October 2010, Tel Aviv, Israel
Y1 - 2011
SP - 379
EP - 386
ER -
TY - JOUR
A1 - Mikucki, Jill Ann
A1 - Schuler, C. G.
A1 - Digel, Ilya
A1 - Kowalski, Julia
A1 - Tuttle, M. J.
A1 - Chua, Michelle
A1 - Davis, R.
A1 - Purcell, Alicia
A1 - Ghosh, D.
A1 - Francke, G.
A1 - Feldmann, M.
A1 - Espe, C.
A1 - Heinen, Dirk
A1 - Dachwald, Bernd
A1 - Clemens, Joachim
A1 - Lyons, W. B.
A1 - Tulaczyk, S.
T1 - Field-Based planetary protection operations for melt probes: validation of clean access into the blood falls, antarctica, englacial ecosystem
JF - Astrobiology
N2 - Subglacial environments on Earth offer important analogs to Ocean World targets in our solar system. These unique microbial ecosystems remain understudied due to the challenges of access through thick glacial ice (tens to hundreds of meters). Additionally, sub-ice collections must be conducted in a clean manner to ensure sample integrity for downstream microbiological and geochemical analyses. We describe the field-based cleaning of a melt probe that was used to collect brine samples from within a glacier conduit at Blood Falls, Antarctica, for geomicrobiological studies. We used a thermoelectric melting probe called the IceMole that was designed to be minimally invasive in that the logistical requirements in support of drilling operations were small and the probe could be cleaned, even in a remote field setting, so as to minimize potential contamination. In our study, the exterior bioburden on the IceMole was reduced to levels measured in most clean rooms, and below that of the ice surrounding our sampling target. Potential microbial contaminants were identified during the cleaning process; however, very few were detected in the final englacial sample collected with the IceMole and were present in extremely low abundances (∼0.063% of 16S rRNA gene amplicon sequences). This cleaning protocol can help minimize contamination when working in remote field locations, support microbiological sampling of terrestrial subglacial environments using melting probes, and help inform planetary protection challenges for Ocean World analog mission concepts.
Y1 - 2023
U6 - https://doi.org/10.1089/ast.2021.0102
SN - 1557-8070 (online)
SN - 153-1074 (print)
VL - 23
IS - 11
SP - 1165
EP - 1178
PB - Liebert
CY - New York, NY
ER -
TY - JOUR
A1 - Schöning, Michael Josef
A1 - Poghossian, Arshak
A1 - Schultze, J. W.
A1 - Lüth, H.
T1 - Field-effect based multifunctional hybrid sensor module for the determination of both (bio-)chemical and physical paramters
JF - Proceedings of SPIE. 4576 (2002)
Y1 - 2002
SP - 149
EP - 159
ER -
TY - JOUR
A1 - Poghossian, Arshak
A1 - Jablonski, Melanie
A1 - Koch, Claudia
A1 - Bronder, Thomas
A1 - Rolka, David
A1 - Wege, Christina
A1 - Schöning, Michael Josef
T1 - Field-effect biosensor using virus particles as scaffolds for enzyme immobilization
JF - Biosensors and Bioelectronics
N2 - A field-effect biosensor employing tobacco mosaic virus (TMV) particles as scaffolds for enzyme immobilization is presented. Nanotubular TMV scaffolds allow a dense immobilization of precisely positioned enzymes with retained activity. To demonstrate feasibility of this new strategy, a penicillin sensor has been developed by coupling a penicillinase with virus particles as a model system. The developed field-effect penicillin biosensor consists of an Al-p-Si-SiO₂-Ta₂O₅-TMV structure and has been electrochemically characterized in buffer solutions containing different concentrations of penicillin G. In addition, the morphology of the biosensor surface with virus particles was characterized by scanning electron microscopy and atomic force microscopy methods. The sensors possessed a high penicillin sensitivity of ~ 92 mV/dec in a nearly-linear range from 0.1 mM to 10 mM, and a low detection limit of about 50 µM. The long-term stability of the penicillin biosensor was periodically tested over a time period of about one year without any significant loss of sensitivity. The biosensor has also been successfully applied for penicillin detection in bovine milk samples.
Y1 - 2018
U6 - https://doi.org/10.1016/j.bios.2018.03.036
SN - 0956-5663
VL - 110
SP - 168
EP - 174
PB - Elsevier
CY - Amsterdam
ER -
TY - CHAP
A1 - Jablonski, Melanie
A1 - Koch, Claudia
A1 - Bronder, Thomas
A1 - Poghossian, Arshak
A1 - Wege, Christina
A1 - Schöning, Michael Josef
T1 - Field-Effect Biosensors Modified with Tobacco Mosaic Virus Nanotubes as Enzyme Nanocarrier
T2 - MDPI Proceeding
Y1 - 2017
U6 - https://doi.org/10.3390/proceedings1040505
N1 - Eurosensors 2017 Conference, Paris, France, 3–6 September 2017
VL - 1
IS - 4
ER -
TY - JOUR
A1 - Beging, Stefan
A1 - Mlynek, Daniela
A1 - Hataihimakul, Sudkanung
A1 - Poghossian, Arshak
A1 - Baldsiefen, Gerhard
A1 - Busch, Heinz
A1 - Laube, Norbert
A1 - Kleinen, Lisa
A1 - Schöning, Michael Josef
T1 - Field-effect calcium sensor for the determination of the risk of urinary stone formation
JF - Sensors and Actuators B: Chemical. 144 (2010), H. 2
Y1 - 2010
N1 - 22nd International Conference on Eurosensors - Dresden, Germany, 7-10 September 2008 ; Eurosensors ; (22, 2008, Dresden)
SP - 374
EP - 379
ER -
TY - JOUR
A1 - Poghossian, Arshak
A1 - Karschuck, Tobias
A1 - Wagner, Patrick
A1 - Schöning, Michael Josef
T1 - Field-Effect Capacitors Decorated with Ligand-Stabilized Gold Nanoparticles: Modeling and Experiments
JF - Biosensors
N2 - Nanoparticles are recognized as highly attractive tunable materials for designing field-effect biosensors with enhanced performance. In this work, we present a theoretical model for electrolyte-insulator-semiconductor capacitors (EISCAP) decorated with ligand-stabilized charged gold nanoparticles. The charged AuNPs are taken into account as additional, nanometer-sized local gates. The capacitance-voltage (C–V) curves and constant-capacitance (ConCap) signals of the AuNP-decorated EISCAPs have been simulated. The impact of the AuNP coverage on the shift of the C–V curves and the ConCap signals was also studied experimentally on Al–p-Si–SiO₂ EISCAPs decorated with positively charged aminooctanethiol-capped AuNPs. In addition, the surface of the EISCAPs, modified with AuNPs, was characterized by scanning electron microscopy for different immobilization times of the nanoparticles.
KW - aminooctanethiol
KW - nanoparticle coverage
KW - capacitive model
KW - gold nanoparticles
KW - field-effect sensor
KW - electrolyte-insulator-semiconductor capacitors
Y1 - 2022
U6 - https://doi.org/10.3390/bios12050334
SN - 2079-6374
N1 - This article belongs to the Special Issue "Biosensors in Nanotechnology"
VL - 12
IS - 5
PB - MDPI
CY - Basel
ER -
TY - JOUR
A1 - Poghossian, Arshak
A1 - Ingebrandt, S.
A1 - Offenhäusser, A.
A1 - Schöning, Michael Josef
T1 - Field-effect devices for detecting cellular signals
JF - Seminars in Cell & Developmental Biology. 20 (2009), H. 1
Y1 - 2009
SN - 1096-3634
SP - 41
EP - 48
PB - Elsevier
CY - Amsterdam
ER -
TY - JOUR
A1 - Poghossian, Arshak
A1 - Weil, M. H.
A1 - Bäcker, Matthias
A1 - Mayer, D.
A1 - Schöning, Michael Josef
T1 - Field-effect Devices Functionalised with Gold-Nanoparticle/Macromolecule Hybrids: New Opportunities for a Label-Free Biosensing
JF - Procedia Engineering
N2 - Field-effect capacitive electrolyte-insulator-semiconductor (EIS) sensors functionalised with citrate-capped gold nanoparticles (AuNP) have been used for the electrostatic detection of macromolecules by their intrinsic molecular charge. The EIS sensor detects the charge changes in the AuNP/macromolecule hybrids induced by the adsorption or binding events. A feasibility of the proposed detection scheme has been exemplary demonstrated by realising EIS sensors for the detection of poly-D-lysine molecules.
Y1 - 2012
U6 - https://doi.org/10.1016/j.proeng.2012.09.136
SN - 1877-7058
N1 - Part of special issue "26th European Conference on Solid-State Transducers, EUROSENSOR 2012"
IS - 47
SP - 273
EP - 276
PB - Elsevier
CY - Amsterdam
ER -
TY - JOUR
A1 - Gun, Jenny
A1 - Schöning, Michael Josef
A1 - Abouzar, Maryam H.
A1 - Poghossian, Arshak
A1 - Katz, Evgeny
T1 - Field-Effect Nanoparticle-Based Glucose Sensor on a Chip: Amplification Effect of Coimmobilized Redox Species
JF - Electroanalysis. 20 (2008), H. 16
Y1 - 2008
SN - 1521-4109
SP - 1748
EP - 1753
ER -
TY - JOUR
A1 - Abouzar, Maryam H.
A1 - Ingebrandt, S.
A1 - Poghossian, Arshak
A1 - Zhang, Y.
A1 - Moritz, W.
A1 - Schöning, Michael Josef
T1 - Field-effect nanoplate capacitive pH sensor based on SOI structure
JF - Semiconductor micro- and nanoelectronics : Proceedings of the Seventh International Conference , Tsakhcadzor, Armenia July 3-5 2009
Y1 - 2009
SP - 55
EP - 58
ER -
TY - JOUR
A1 - Yoshinobu, Tatsuo
A1 - Miyamoto, Ko-ichiro
A1 - Wagner, Torsten
A1 - Schöning, Michael Josef
T1 - Field-effect sensors combined with the scanned light pulse technique: from artificial olfactory images to chemical imaging technologies
JF - Chemosensors
N2 - The artificial olfactory image was proposed by Lundström et al. in 1991 as a new strategy for an electronic nose system which generated a two-dimensional mapping to be interpreted as a fingerprint of the detected gas species. The potential distribution generated by the catalytic metals integrated into a semiconductor field-effect structure was read as a photocurrent signal generated by scanning light pulses. The impact of the proposed technology spread beyond gas sensing, inspiring the development of various imaging modalities based on the light addressing of field-effect structures to obtain spatial maps of pH distribution, ions, molecules, and impedance, and these modalities have been applied in both biological and non-biological systems. These light-addressing technologies have been further developed to realize the position control of a faradaic current on the electrode surface for localized electrochemical reactions and amperometric measurements, as well as the actuation of liquids in microfluidic devices.
KW - visualization
KW - light-addressing technologies
KW - scanned light pulse technique
KW - field-effect structure
KW - MOS
KW - metal-oxide-semiconductor structure
KW - catalytic metal
KW - electronic nose
KW - gas sensor
KW - artificial olfactory image
Y1 - 2024
U6 - https://doi.org/10.3390/chemosensors12020020
SN - 2227-9040
N1 - This article belongs to the Special Issue "An Exciting Journey of Chemical Sensors and Biosensors: A Theme Issue in Honor of Professor Ingemar Lundström"
Corresponding author: Tatsuo Yoshinobu, Michael J. Schöning
VL - 12
IS - 2
PB - MDPI
CY - Basel
ER -
TY - JOUR
A1 - Poghossian, Arshak
A1 - Abouzar, Maryam H.
A1 - Sakkari, M.
A1 - Kassab, T.
A1 - Han, Y.
A1 - Ingebrandt, S.
A1 - Offenhäusser, A.
A1 - Schöning, Michael Josef
T1 - Field-effect sensors for monitoring the layer-by-layer adsorption of charged macromolecules
JF - Sensors and Actuators B: Chemical. 118 (2006), H. 1-2
Y1 - 2006
SN - 0925-4005
N1 - Eurosensors XIX - Eurosensors XIX - The 19th European Conference on Solid-State Transducers
SP - 163
EP - 170
ER -
TY - JOUR
A1 - Poghossian, Arshak
A1 - Jablonski, Melanie
A1 - Molinnus, Denise
A1 - Wege, Christina
A1 - Schöning, Michael Josef
T1 - Field-Effect Sensors for Virus Detection: From Ebola to SARS-CoV-2 and Plant Viral Enhancers
JF - Frontiers in Plant Science
N2 - Coronavirus disease 2019 (COVID-19) is a novel human infectious disease provoked by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Currently, no specific vaccines or drugs against COVID-19 are available. Therefore, early diagnosis and treatment are essential in order to slow the virus spread and to contain the disease outbreak. Hence, new diagnostic tests and devices for virus detection in clinical samples that are faster, more accurate and reliable, easier and cost-efficient than existing ones are needed. Due to the small sizes, fast response time, label-free operation without the need for expensive and time-consuming labeling steps, the possibility of real-time and multiplexed measurements, robustness and portability (point-of-care and on-site testing), biosensors based on semiconductor field-effect devices (FEDs) are one of the most attractive platforms for an electrical detection of charged biomolecules and bioparticles by their intrinsic charge. In this review, recent advances and key developments in the field of label-free detection of viruses (including plant viruses) with various types of FEDs are presented. In recent years, however, certain plant viruses have also attracted additional interest for biosensor layouts: Their repetitive protein subunits arranged at nanometric spacing can be employed for coupling functional molecules. If used as adapters on sensor chip surfaces, they allow an efficient immobilization of analyte-specific recognition and detector elements such as antibodies and enzymes at highest surface densities. The display on plant viral bionanoparticles may also lead to long-time stabilization of sensor molecules upon repeated uses and has the potential to increase sensor performance substantially, compared to conventional layouts. This has been demonstrated in different proof-of-concept biosensor devices. Therefore, richly available plant viral particles, non-pathogenic for animals or humans, might gain novel importance if applied in receptor layers of FEDs. These perspectives are explained and discussed with regard to future detection strategies for COVID-19 and related viral diseases.
Y1 - 2020
U6 - https://doi.org/10.3389/fpls.2020.598103
VL - 11
IS - Article 598103
SP - 1
EP - 14
PB - Frontiers
CY - Lausanne
ER -
TY - CHAP
A1 - Poghossian, Arshak
A1 - Ingebrandt, S.
A1 - Platen, J.
A1 - Schöning, Michael Josef
T1 - Field-effect sensors with charged macromolecules – from micro towards nano aspects
T2 - Biochemical Sensing Utilisation of Micro-and Nanotechnologies, Warschau, Nov. 2005 : Lecture Notes of the ICB Seminar / ed.: M. Mascini, W. Torbicz
Y1 - 2006
SP - 74
EP - 81
PB - Polish Academy Sciences Press
CY - Warsaw
ER -
TY - JOUR
A1 - Poghossian, Arshak
A1 - Abouzar, Maryam H.
A1 - Amberger, F.
A1 - Mayer, D.
A1 - Han, Y.
A1 - Ingebrandt, S.
A1 - Offenhäusser, A.
A1 - Schöning, Michael Josef
T1 - Field-effect sensors with charged macromolecules: Characterisation by capacitance–voltage, constant-capacitance, impedance spectroscopy and atomic-force microscopy methods
JF - Biosensors and Bioelectronics. 22 (2007), H. 9-10
Y1 - 2007
SN - 0956-5663
N1 - Selected Papers from the Ninth World Congress On Biosensors. Toronto, Canada 10 - 12 May 2006, Alice X. J . Tang
SP - 2100
EP - 2107
ER -
TY - JOUR
A1 - Werner, Frederik
A1 - Schusser, Sebastian
A1 - Spalthahn, Heiko
A1 - Wagner, Torsten
A1 - Yoshinobu, Tatsuo
A1 - Schöning, Michael Josef
T1 - Field-programmable gate array based controller for multi spot light-addressable potentiometric sensors with integrated signal correction mode
JF - Electrochimica Acta
N2 - A light-addressable potentiometric sensor (LAPS) can measure the concentration of one or several analytes at the sensor surface simultaneously in a spatially resolved manner. A modulated light pointer stimulates the semiconductor structure at the area of interest and a responding photocurrent can be read out. By simultaneous stimulation of several areas with light pointers of different modulation frequencies, the read out can be performed at the same time. With the new proposed controller electronic based on a field-programmable gate array (FPGA), it is possible to control the modulation frequencies, phase shifts, and light brightness of multiple light pointers independently and simultaneously. Thus, it is possible to investigate the frequency response of the sensor, and to examine the analyte concentration by the determination of the surface potential with the help of current/voltage curves and phase/voltage curves. Additionally, the ability to individually change the light intensities of each light pointer is used to perform signal correction.
Y1 - 2011
U6 - https://doi.org/10.1016/j.electacta.2011.03.012
SN - 0013-4686
VL - 56
IS - 26
SP - 9656
EP - 9660
PB - Elsevier
CY - Amsterdam
ER -
TY - JOUR
A1 - Baader, Fabian
A1 - Boxberg, Marc S.
A1 - Chen, Qian
A1 - Förstner, Roger
A1 - Kowalski, Julia
A1 - Dachwald, Bernd
T1 - Field-test performance of an ice-melting probe in a terrestrial analogue environment
JF - Icarus
N2 - Melting probes are a proven tool for the exploration of thick ice layers and clean sampling of subglacial water on Earth. Their compact size and ease of operation also make them a key technology for the future exploration of icy moons in our Solar System, most prominently Europa and Enceladus. For both mission planning and hardware engineering, metrics such as efficiency and expected performance in terms of achievable speed, power requirements, and necessary heating power have to be known.
Theoretical studies aim at describing thermal losses on the one hand, while laboratory experiments and field tests allow an empirical investigation of the true performance on the other hand. To investigate the practical value of a performance model for the operational performance in extraterrestrial environments, we first contrast measured data from terrestrial field tests on temperate and polythermal glaciers with results from basic heat loss models and a melt trajectory model. For this purpose, we propose conventions for the determination of two different efficiencies that can be applied to both measured data and models. One definition of efficiency is related to the melting head only, while the other definition considers the melting probe as a whole. We also present methods to combine several sources of heat loss for probes with a circular cross-section, and to translate the geometry of probes with a non-circular cross-section to analyse them in the same way. The models were selected in a way that minimizes the need to make assumptions about unknown parameters of the probe or the ice environment.
The results indicate that currently used models do not yet reliably reproduce the performance of a probe under realistic conditions. Melting velocities and efficiencies are constantly overestimated by 15 to 50 % in the models, but qualitatively agree with the field test data. Hence, losses are observed, that are not yet covered and quantified by the available loss models. We find that the deviation increases with decreasing ice temperature. We suspect that this mismatch is mainly due to the too restrictive idealization of the probe model and the fact that the probe was not operated in an efficiency-optimized manner during the field tests. With respect to space mission engineering, we find that performance and efficiency models must be used with caution in unknown ice environments, as various ice parameters have a significant effect on the melting process. Some of these are difficult to estimate from afar.
Y1 - 2023
U6 - https://doi.org/10.1016/j.icarus.2023.115852
N1 - Forschungsdaten hierzu: "Performance data of an ice-melting probe from field tests in two different ice environments" (https://opus.bibliothek.fh-aachen.de/opus4/frontdoor/index/index/docId/10890)
IS - 409
PB - Elsevier
CY - Amsterdam
ER -
TY - JOUR
A1 - Jacobs, Stephan
A1 - Gebhardt, Michael
A1 - Kethers, Stefanie
A1 - Rzasa, Wojtek
T1 - Filling HTML forms simultaneously: CoWeb — architecture and functionality
JF - Computer Networks and ISDN Systems. Vol. 30 (1996), H. Issues 1-7
Y1 - 1996
SN - 0376-5075
SP - 1385
EP - 1395
ER -
TY - CHAP
A1 - Brandes, Sinja
A1 - Gligorevic, Snjezana
A1 - Schnell, Michael
A1 - Rokitansky, Carl-Herbert
A1 - Ehammer, Max
A1 - Gräupl, Thomas
A1 - Schlereth, Armin
A1 - Rihacek, Christoph
T1 - Final assessment of the B-VHF overlay concept
T2 - IEEE Aerospace Conference : 3-10 March 2007, Big Sky, Mont.
Y1 - 2007
SN - 1-4244-0525-4
SP - 1
EP - 18
ER -
TY - JOUR
A1 - Mackenstein, Hans
A1 - Jeffery, Charlie
T1 - Financial equalization in the 1990s : on the road back to Karlsruhe / Hans Mackenstein and Charlie Jeffery
JF - Recasting German federalism : the legacies of unification
Y1 - 1999
SN - 1-85567-579-x
SP - 155
EP - 176
PB - Pinter
CY - London
ER -
TY - CHAP
A1 - Hingley, Peter
A1 - Dikta, Gerhard
T1 - Finding a well performing box-jenkins forecasting model for annualised patent filings counts
T2 - International Symposium on Forecasting, Thessaloniki, Greece, June 2019
Y1 - 2019
ER -
TY - CHAP
A1 - Leise, Philipp
A1 - Altherr, Lena
A1 - Simon, Nicolai
A1 - Pelz, Peter F.
T1 - Finding global-optimal gearbox designs for battery electric vehicles
T2 - Optimization of complex systems - theory, models, algorithms and applications : WCGO 2019
N2 - In order to maximize the possible travel distance of battery electric vehicles with one battery charge, it is mandatory to adjust all components of the powertrain carefully to each other. While current vehicle designs mostly simplify the powertrain rigorously and use an electric motor in combination with a gearbox with only one fixed transmission ratio, the use of multi-gear systems has great potential. First, a multi-speed system is able to improve the overall energy efficiency. Secondly, it is able to reduce the maximum momentum and therefore to reduce the maximum current provided by the traction battery, which results in a longer battery lifetime. In this paper, we present a systematic way to generate multi-gear gearbox designs that—combined with a certain electric motor—lead to the most efficient fulfillment of predefined load scenarios and are at the same time robust to uncertainties in the load. Therefore, we model the electric motor and the gearbox within a Mixed-Integer Nonlinear Program, and optimize the efficiency of the mechanical parts of the powertrain. By combining this mathematical optimization program with an unsupervised machine learning algorithm, we are able to derive global-optimal gearbox designs for practically relevant momentum and speed requirements.
KW - Powertrain
KW - Gearbox
KW - Optimization
KW - BEV
KW - WLTP
Y1 - 2019
SN - 978-3-030-21802-7
U6 - https://doi.org/10.1007/978-3-030-21803-4_91
SP - 916
EP - 925
PB - Springer
CY - Cham
ER -
TY - CHAP
A1 - Bensberg, Frank
A1 - Auth, Gunnar
A1 - Czarnecki, Christian
ED - Czarnecki, Christian
ED - Fettke, Peter
T1 - Finding the perfect RPA match : a criteria-based selection method for RPA solutions
T2 - Robotic process automation : Management, technology, applications
N2 - The benefits of robotic process automation (RPA) are highly related to the usage of commercial off-the-shelf (COTS) software products that can be easily implemented and customized by business units. But, how to find the best fitting RPA product for a specific situation that creates the expected benefits? This question is related to the general area of software evaluation and selection. In the face of more than 75 RPA products currently on the market, guidance considering those specifics is required. Therefore, this chapter proposes a criteria-based selection method specifically for RPA. The method includes a quantitative evaluation of costs and benefits as well as a qualitative utility analysis based on functional criteria. By using the visualization of financial implications (VOFI) method, an application-oriented structure is provided that opposes the total cost of ownership to the time savings times salary (TSTS). For the utility analysis a detailed list of functional criteria for RPA is offered. The whole method is based on a multi-vocal review of scientific and non-scholarly literature including publications by business practitioners, consultants, and vendors. The application of the method is illustrated by a concrete RPA example. The illustrated
structures, templates, and criteria can be directly utilized by practitioners in their real-life RPA implementations. In addition, a normative decision process for selecting RPA alternatives is proposed before the chapter closes with a discussion and outlook.
KW - robotic process automation
KW - business process automation
KW - commercial offthe- shelf solutions
KW - software evaluation
KW - software selection
Y1 - 2021
SN - 978-3-11-067677-8
SN - 978-3-11-067669-3
SN - 9783110676686
U6 - https://doi.org/10.1515/9783110676693-201
SP - 47
EP - 75
PB - De Gruyter
CY - Oldenbourg
ER -
TY - JOUR
A1 - Vitusevich, S. A.
A1 - Förster, Arnold
A1 - Reetz, W.
A1 - Lüth, H.
A1 - Belyaev, A. E.
A1 - Danylyuk, S. V.
T1 - Fine structure of photoresponse spectra in a double-barrier resonant tunnelling diode
JF - Nanotechnology. 11 (2000), H. 4
Y1 - 2000
SN - 1361-6528
SP - 305
EP - 308
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 - Kilic, S. A.
A1 - Raatschen, Hans-Jürgen
A1 - Astaneh-Asl, A.
A1 - Apaydin, N. M.
T1 - Finite element modeling of the Fatih Sultan Mehmet Suspension Bridge
T2 - Multi-Span Large Bridges - Proceedings of the International Conference on Multi-Span Large Bridges
Y1 - 2015
SN - 9781138027572
SP - 1169
EP - 1173
PB - CRC Press
CY - Leiden
ER -
TY - JOUR
A1 - Novacek, V.
A1 - Tran, Thanh Ngoc
A1 - Klinge, U.
A1 - Tolba, R. H.
A1 - Staat, Manfred
A1 - Bronson, D. G.
A1 - Miesse, A. M.
A1 - Whiffen, J.
A1 - Turquier, F.
T1 - Finite element modelling of stapled colorectal end-to-end anastomosis : Advantages of variable height stapler design
JF - Journal of Biomechanics
N2 - The impact of surgical staplers on tissues has been studied mostly in an empirical manner. In this paper, finite element method was used to clarify the mechanics of tissue stapling and associated phenomena. Various stapling modalities and several designs of circular staplers were investigated to evaluate the impact of the device on tissues and mechanical performance of the end-to-end colorectal anastomosis. Numerical simulations demonstrated that a single row of staples is not adequate to resist leakage due to non-linear buckling and opening of the tissue layers between two adjacent staples. Compared to the single staple row configuration, significant increase in stress experienced by the tissue at the inner staple rows was observed in two and three rows designs. On the other hand, adding second and/or third staple row had no effect on strain in the tissue inside the staples. Variable height design with higher staples in outer rows significantly reduced the stresses and strains in outer rows when compared to the same configuration with flat cartridge.
KW - Variable height stapler design
KW - Anastomotic leakage
KW - Finite element modelling
KW - End-to-end colorectal anastomosis
KW - Surgical staplers
Y1 - 2012
U6 - https://doi.org/10.1016/j.jbiomech.2012.07.021
SN - 1873-2380
VL - 45
IS - 115
SP - 2693
EP - 2697
PB - Elsevier
CY - Amsterdam
ER -
TY - CHAP
A1 - Tran, Thanh Ngoc
A1 - Staat, Manfred
A1 - Kreißig, R.
T1 - Finite element shakedown and limit reliability analysis of thin shells
N2 - A procedure for the evaluation of the failure probability of elastic-plastic thin shell structures is presented. The procedure involves a deterministic limit and shakedown analysis for each probabilistic iteration which is based on the kinematical approach and the use the exact Ilyushin yield surface. Based on a direct definition of the limit state function, the non-linear problems may be efficiently solved by using the First and Second Order Reliabiblity Methods (Form/SORM). This direct approach reduces considerably the necessary knowledge of uncertain technological input data, computing costs and the numerical error. In: Computational plasticity / ed. by Eugenio Onate. Dordrecht: Springer 2007. VII, 265 S. (Computational Methods in Applied Sciences ; 7) (COMPLAS IX. Part 1 . International Center for Numerical Methods in Engineering (CIMNE)). ISBN 978-1-402-06576-7 S. 186-189
KW - Finite-Elemente-Methode
KW - Limit analysis
KW - shakedown analysis
KW - Exact Ilyushin yield surface
KW - Random variable
KW - First Order Reliabiblity Method
Y1 - 2007
ER -
TY - JOUR
A1 - Höttges, Jörg
A1 - Feldhaus, R.
A1 - Brockhaus, T.
A1 - Rouvé, Gerhard
T1 - Finite Element Simulation of Flow and Pollution Transport applied to a Part of the River Rhine / Feldhaus, R.; J. Höttges, T. Brockhaus; G. Rouvé
JF - Hydraulic and environmental modelling : proceedings of the Second International Conference on Hydraulic and Environmental Modelling of Coastal, Estuarine, and River Waters / [IAHR-AIRH]. Ed. by R. A. Falconer
Y1 - 1992
N1 - International Conference on Hydraulic and Environmental Modelling of Coastal, Estuarine, and River Waters ; (2, 1992, Bradford)
PB - Ashgate
CY - Aldershot, Hants, UK [u.a.]
ER -
TY - JOUR
A1 - Prume, Klaus
A1 - Franken, Klaus
A1 - Maier, Horst R.
A1 - Waser, Rainer
T1 - Finite-Element Analysis of Ceramic Multilayer Capacitors: Failure Probability Caused by Wave Soldering and Bending Loads / Franken, Klaus ; Maier, Horst R. ; Prume, Klaus ; Waser, Rainer
JF - Journal of the American Ceramic Society. 83 (2000), H. 6
Y1 - 2000
SN - 0002-7820
SP - 1433
EP - 1440
ER -
TY - JOUR
A1 - Prume, Klaus
A1 - Waser, Rainer
A1 - Franken, Klaus
A1 - Maier, Horst R.
T1 - Finite-Element Analysis of Ceramic Multilayer Capacitors: Modeling and Electrical Impedance Spectroscopy for a Nondestructive Failure Test / Prume, Klaus ; Waser, Rainer ; Franken, Klaus ; Maier, Horst R. ;
JF - Journal of the American Ceramic Society. 83 (2000), H. 5
Y1 - 2000
SN - 0002-7820
SP - 1153
EP - 1159
ER -
TY - JOUR
A1 - Prume, Klaus
A1 - Waser, Rainer
T1 - Finite-element simulation of coupled characteristics of ceramic multilayer capacitors under transient electrical loading / Prume, Klaus ; Waser, Rainer
JF - Proceedings of the 2000 12th IEEE International Symposium on Applications of Ferroelectrics. Vol. 2
Y1 - 2000
N1 - ISAF 2000. Proceedings of the 2000 12th IEEE International Symposium on Applications of Ferroelectrics
SP - 675
EP - 678
ER -
TY - JOUR
A1 - Janz, Norbert
A1 - Lööf, Hans
A1 - Peters, Bettina
T1 - Firm Level Innovation and Productivity, Is there a Common Story Across Countries?
JF - Problems and Perspectives in Management (2004)
Y1 - 2004
SN - ISSN 1727-7051
N1 - online download: http://businessperspectives.org/files/ppm/PPM_EN_2004_02_Janz.pdf
SP - 184
EP - 204
ER -
TY - BOOK
A1 - Janz, Norbert
A1 - Lööf, Hans
A1 - Peters, Bettina
T1 - Firm Level Innovation and Productivity, Is there a Common Story Across Countries?
Y1 - 2003
SN - ISSN 1727-7051
N1 - ZEW Diskussion Paper. No 03-26 Online : ftp://ftp.zew.de/pub/zew-docs/dp/dp0326.pdf
PB - Zentrum für Europäische Wirtschaftsforschung ZEW
CY - Mannheim
ER -
TY - CHAP
A1 - Martin, S.
A1 - Berg, G.
A1 - Hardt, Arno
A1 - Hürlimann, W.
A1 - Köhler, M.
A1 - Meißberger, J.
A1 - Sagefka, T.
A1 - Schult, O. W. B.
ED - Sanderson, N. E.
T1 - First experience with the magnet spectrometer 'BIG KARL'
T2 - Use of magnetic spectrometers in nuclear physics : proceedings of the Daresbury study weekend 10 - 11 March 1979
Y1 - 1979
SP - 38
EP - 42
PB - Daresbury Lab.
CY - Daresbury
ER -
TY - JOUR
A1 - Müller-Veggian, Mattea
A1 - Cesari, V.
A1 - De Nardo, L.
A1 - Colautti, P.
T1 - First microdosimetric measurements down to 25nm
JF - Annual report / Istituto Nazionale di Fisica Nucleare, LNL, Laboratori Nazionali di Legnaro. 2000 (2001)
Y1 - 2001
SN - 88-7337-000-4
N1 - LNL-INFN(REP)-178/2001
SP - 82
ER -
TY - JOUR
A1 - Müller-Veggian, Mattea
A1 - Cesari, V.
A1 - De Nardo, L.
A1 - Colautti, P.
T1 - First microdosimetric measurements with a 10b-loaded TEPC
JF - Annual report / Istituto Nazionale di Fisica Nucleare, LNL, Laboratori Nazionali di Legnaro. 2001 (2002)
Y1 - 2002
SN - 88-7337-002-0
N1 - LNL-INFN(REP)-182/2002
SP - 110
EP - 111
ER -
TY - JOUR
A1 - Hoyler, Friedrich
A1 - Bauske, I.
A1 - Arias, J. M.
T1 - First observation of scissors mode states in an odd-mass nucleus / I. Bauske ; J. M. Arias ... F. Hoyler ...
JF - Physical review letters. 71 (1993), H. 7
Y1 - 1993
SN - 0031-9007
SP - 975
EP - 978
ER -
TY - JOUR
A1 - Heuermann, Holger
A1 - Harzheim, Thomas
A1 - Cronenbroeck, Tobias
T1 - First SIMO harmonic radar based on the SFCW concept and the HR transfer function
JF - Remote sensing
N2 - This paper presents a new SIMO radar system based on a harmonic radar (HR) stepped frequency continuous wave (SFCW) architecture. Simple tags that can be electronically individually activated and deactivated via a DC control voltage were developed and combined to form an MO array field. This HR operates in the entire 2.45 GHz ISM band for transmitting the illumination signal and receives at twice the stimulus frequency and bandwidth centered around 4.9 GHz. This paper presents the development, the basic theory of a HR system for the characterization of objects placed into the propagation path in-between the radar and the reflectors (similar to a free-space measurement with a network analyzer) as well as first measurements performed by the system. Further detailed measurement series will be made available later on to other researchers to develop AI and machine learning based signal processing routines or synthetic aperture radar algorithms for imaging, object recognition, and feature extraction. For this purpose, the necessary information is published in this paper. It is explained in detail why this SIMO-HR can be an attractive solution augmenting or replacing existing systems for radar measurements in production technology for material under test measurements and as a simplified MIMO system. The novel HR transfer function, which is a basis for researchers and developers for material characterization or imaging algorithms, is introduced and metrologically verified in a well traceable coaxial setup.
KW - MUT measurement; scanner
KW - transponder
KW - SFCW
KW - harmonic radar
KW - nonlinear radar
Y1 - 2021
U6 - https://doi.org/10.3390/rs13245088
SN - 2072-4292
N1 - This article belongs to the Special Issue "Nonlinear Junction Detection and Harmonic Radar"
VL - 13
IS - 24
PB - MDPI
CY - Basel
ER -
TY - JOUR
A1 - Göttsche, Joachim
A1 - Hoffschmidt, Bernhard
A1 - Alexopoulos, Spiros
A1 - Funke, J.
A1 - Schwarzbözl, P.
T1 - First Simulation Results for the Hybridization of Small Solar Power Tower Plants
JF - EuroSun 2008 : 1st International Conference on Solar Heating, Cooling and Buildings, 2008-10-07 - 2008-10-10, Lissabon (Portugal). Vol. 1
Y1 - 2008
SN - 978-1-61782-228-5
N1 - Kurzfassung unter http://elib.dlr.de/56357/
SP - 1299
EP - 1306
PB - Sociedade Portuguesa De Energia Solar (SPES)
CY - Lisbon
ER -
TY - JOUR
A1 - Umutlu, L.
A1 - Maderwald, S.
A1 - Kinner, S.
A1 - Kraff, O.
A1 - Bitz, Andreas
A1 - Orzada, S.
A1 - Johst, S.
A1 - Wrede, K.
A1 - Forsting, M.
A1 - Ladd, M. E.
A1 - Lauenstein, T. C.
A1 - Quick, H. H.
T1 - First-pass contrast-enhanced renal MRA at 7 Tesla: initial results
JF - European Radiology
Y1 - 2013
U6 - https://doi.org/10.1007/s00330-012-2666-0
SN - 1432-1084
VL - 23
IS - 4
SP - 1059
EP - 1066
PB - Springer
CY - Berlin
ER -
TY - CHAP
A1 - Oertel, M.
A1 - Bung, Daniel Bernhard
A1 - Schlenkhoff, Andreas
T1 - Flash flood awareness and prevention
T2 - Water engineering for sustainable environment : 33rd IAHR congress ; 9 - 14 August 2009, Vancouver, British Columbia, Canada
Y1 - 2009
SN - 9789078046080
SP - 1 CD-ROM
ER -
TY - CHAP
A1 - Bung, Daniel Bernhard
A1 - Oertel, M.
A1 - Schlenkhoff, A.
A1 - Schlurmann, Torsten
ED - Obrusnik, Ivan
T1 - Flash flood awareness and prevention in Germany
T2 - Early warning for flash floods : international workshop, Praha 2011 : workshop proceedings
Y1 - 2010
SN - 978-80-86690-91-9
SP - 34
EP - 40
ER -
TY - JOUR
A1 - Engel, Mareike
A1 - Bayer, Hendrik
A1 - Holtmann, Dirk
A1 - Tippkötter, Nils
A1 - Ulber, Roland
T1 - Flavin secretion of Clostridium acetobutylicum in a bioelectrochemical system - Is an iron limitation involved?
JF - Bioelectrochemistry
Y1 - 2019
U6 - https://doi.org/10.1016/j.bioelechem.2019.05.014
SN - 1567-5394
IS - In Press, Accepted Manuscript
PB - Elsevier
CY - Amsterdam
ER -
TY - JOUR
A1 - Vahidpour, Farnoosh
A1 - Oberländer, Jan
A1 - Schöning, Michael Josef
T1 - Flexible Calorimetric Gas Sensors for Detection of a Broad Concentration Range of Gaseous Hydrogen Peroxide: A Step Forward to Online Monitoring of Food-Package Sterilization Processes
JF - Phys. Status Solidi A
N2 - In this study, flexible calorimetric gas sensors are developed for specificdetection of gaseous hydrogen peroxide (H₂O₂) over a wide concentrationrange, which is used in sterilization processes for aseptic packaging industry.The flexibility of these sensors is an advantage for identifying the chemical components of the sterilant on the corners of the food boxes, so-called “coldspots”, as critical locations in aseptic packaging, which are of great importance. These sensors are fabricated on flexible polyimide films by means of thin-film technique. Thin layers of titanium and platinum have been deposited on polyimide to define the conductive structures of the sensors. To detect the high-temperature evaporated H₂O₂, a differential temperature set-up is proposed. The sensors are evaluated in a laboratory-scaled sterilizationsystem to simulate the sterilization process. The concentration range of the evaporated H₂O₂ from 0 to 7.7% v/v was defined and the sensors have successfully detected high as well as low H₂O₂ concentrations with a sensitivity of 5.04 °C/% v/v. The characterizations of the sensors confirm their precise fabrication, high sensitivity and the novelty of low H₂O₂ concentration detections for future inline monitoring of food-package sterilization.
Y1 - 2018
U6 - https://doi.org/10.1002/pssa.201800044
VL - 215
IS - 15
PB - Wiley-VCH
CY - Weinheim
ER -