TY - CONF
AB - Fault effect simulation is a well-established technique for the qualification of robust embedded software and hardware as required by different safety standards. Our article introduces a Virtual Prototype based approach for the fault analysis and fast simulation of a set of automatically generated and target compiled software programs. The approach scales to different RISC-V ISA standard subset configurations and is based on an instruction and hardware register coverage for automatic fault injections of permanent and transient bitflips. The analysis of each software binary evaluates its opcode type and register access coverage including the addressed memory space. Based on this information dedicated sets of fault injected hardware models, i.e., mutants, are generated. The simulation of all mutants conducted with the different binaries finally identifies the cases with a normal termination though executed on a faulty hardware model. They are identified as a subject for further investigations and improvements by the implementation of additional hardware or software safety countermeasures. Our final evaluation results with automatic C code generation, compilation, analysis, and simulation show that QEMU provides an adequate efficient platform, which also scales to more complex scenarios.
AU - Adelt, Peer
AU - Koppelmann, Bastian
AU - Müller, Wolfgang
AU - Scheytt, Christoph
ID - 24027
T2 - MBMV 2020 - Methods and Description Languages for Modelling and Verification of Circuits and Systems; GMM/ITG/GI-Workshop
TI - A Scalable Platform for QEMU Based Fault Effect Analysis for RISC-V Hardware Architectures
ER -
TY - JOUR
AB - In this paper we present the system and circuit level analysis and feasibility study of applying microwave Radio Frequency Identification (RFID) systems with multipleinput multiple-output (MIMO) reader technology for tracking machining tools in multipath fading conditions of production environments. In the proposed system the MIMO reader interrogates single-antenna tags, and a high RFID frequency of 5.8 GHz is chosen to reduce the size of the reader's antenna array. According to the requirements dictated by the performed system analysis at 5.8 GHz, a low power fully integrated analog frontend (AFE) is designed and fabricated in a standard 65-nm CMOS technology for low power passive transponders. Performance of the Differential Drive Rectifier (DDR) topology as the core of the energy harvesting unit is investigated in detail. A multi-stage DDR power scavenging unit is dimensioned to provide a 1.2 V rectified voltage for 20-30 kQ load range, with a high power conversion efficiency (PCE) for high frequency and low input power level signals. The rectified voltage is then converted to a 1 V regulated voltage for the AFE and the baseband processor with 30 to 50 μW of estimated power consumption. Transistors with standard threshold voltage (VT) have been used for implementation. Measurements of the fabricated multi-stage configuration of the circuit show a maximum PCE of 68.8% at -12.46 dBm, and an input quality factor (Q-factor) of approximately 10. Amplitude-shift keying (ASK) demodulator and backscattering modulator with 80% modulation index, operating according to EPC-C1G2 protocol are applied for data transfer. The AFE consumes less than 1 μW in the reading mode. The AFE tag chip is 0.55 × 0.58 mm 2 .
AU - Haddadian, Sanaz
AU - Scheytt, Christoph
ID - 24029
JF - IEEE Journal of Radio Frequency Identification
TI - Analysis, Design and Implementation of a Fully Integrated Analog Front-End for Microwave RFIDs at 5.8 GHz to be Used with Compact MIMO Readers
ER -
TY - CONF
AB - Low-power receivers use direct-detection receiver architecture for its design simplicity and its low power dissipation. However, the direct-detection based receivers suffer from co-channel interference which significantly degrades the communication reliability. Co-channel interference robustness can be improved by using a BPSK Barker code modulated Surface Acoustic Wave (SAW) correlator as a prior stage to the RF direct detection circuit. This paper reports in details the design, fabrication and measurements of a 2.45 GHz SAW correlator with 13 bits length Barker code. The device is fabricated on Lithium Niobate LiNbO3 substrate and it is composed of an input non-coded Inter Digital Transducers (IDT), a Piezoelectric substrate and an output coded IDT. The device wavelength λ is set to 1.6 μm, considering a phase velocity of the wave equal to 3970 m.s-1. Several configurations of the device were designed and fabricated, particularly varying the aperture and the non-coded IDT length to find out the optimal device configuration. All devices were found to operate with Insertion Loss (IL) ranging from 12 to 15 dB at 2.45 GHz with a tip probing measurement setup, while a packaged sample has an IL of 12.45 dB at 2.44 GHz mounted on a PCB with external 50 Ω LC matching network. Additionally, time-domain measurement for the packaged device shows that the output has a correlation peak with a peak-to-side-lobe (PSL) ratio of 4:1 for a -0.5 dBm input BPSK Barker code signal.
AU - Ballandras, Sylvain
AU - Abughannam, Saed
AU - Courjon, Emilie
AU - Scheytt, Christoph
ID - 24030
T2 - GeMiC 2020 - German Microwave Conference
TI - Design and Fabrication of Barker Coded Surface Acoustic Wave (SAW) Correlator at 2.45 GHz for Low-Power Wake-up Receivers
ER -
TY - JOUR
AU - Schraeder, Dirk Theodor
AU - Schafran, Tommy
AU - Geisen, Bärbel
AU - Rubbert, Lisa
ID - 24031
JF - Orthopädie Technik
TI - Ein interdisziplinärer und akutmedizinischer Ansatz zur frühestmöglichen Intervention bei Patienten mit Diabetischem Fußsyndrom
VL - 71 (9)
ER -
TY - JOUR
AB - Abstract
In two-phase flows in which the Capillary number is low, errors in the computation of the surface tension force at the interface cause Front-Capturing methods such as Volume of Fluid (VOF) and Level-Set (LS) to develop interfacial spurious currents. To better solve low Capillary number flows, special treatment is required to reduce such spurious currents. Smoothing the phase indicator field to more accurately compute the curvature or adding interfacial artificial viscosity are techniques that can treat this problem. This study explores OpenFOAM, Fluent and StarCCM+ VOF solvers for the classical case of a static bubble/droplet immersed in a continuous aqueous phase, with the focus on the ability of these solvers to adequately reduce spurious currents. The results are expected to be helpful for practicing chemical engineers who use multiphase CFD solvers in their work.
AU - Inguva, Venkatesh
AU - Schulz, Andreas
AU - Kenig, Eugeny Y.
ID - 24120
JF - Chemical Product and Process Modeling
SN - 1934-2659
TI - On methods to reduce spurious currents within VOF solver frameworks. Part 1: a review of the static bubble/droplet
ER -
TY - GEN
AU - Schöppner, Volker
AU - Austermeier, Laura
AU - Dietl, Kilian
ID - 24133
KW - Compoundieren
KW - Doppenschneckenextruder
KW - Energieeintrag
T2 - Blasformen & Extrusionswerkzeuge
TI - Der richtige Dreh für Simulationen
ER -
TY - GEN
AU - Schöppner, Volker
AU - Austermeier, Laura
AU - Dietl, Kilian
ID - 24134
KW - Compoundieren
KW - Doppenschneckenextruder
KW - Energieeintrag
T2 - K Zeitung
TI - SKZ simuliert Doppelschnecke
ER -
TY - CONF
AU - Ramaswamy, Arunselvan
ID - 24145
T2 - 2020 28th Euromicro International Conference on Parallel, Distributed and Network-Based Processing (PDP)
TI - DSPG: Decentralized Simultaneous Perturbations Gradient Descent Scheme
ER -
TY - CONF
AU - Heid, Stefan Helmut
AU - Ramaswamy, Arunselvan
AU - Hüllermeier, Eyke
ID - 24146
T2 - Proceedings-30. Workshop Computational Intelligence: Berlin, 26.-27. November 2020
TI - Constrained Multi-Agent Optimization with Unbounded Information Delay
VL - 26
ER -
TY - JOUR
AU - Ramaswamy, Arunselvan
AU - Bhatnagar, Shalabh
AU - Quevedo, Daniel E
ID - 24147
JF - IEEE Transactions on Automatic Control
TI - Asynchronous stochastic approximations with asymptotically biased errors and deep multi-agent learning
ER -
TY - JOUR
AB - AbstractThis paper presents the results of an interlaboratory study of the rheological properties of cement paste and ultrasound gel as reference substance. The goal was to quantify the comparability and reproducibility of measurements of the Bingham parameters yield stress and plastic viscosity when measured on one specific paste composition and one particular ultrasound gel in different laboratories using different rheometers and measurement geometries. The procedures for both in preparing the cement paste and carrying out the rheological measurements on cement paste and ultrasound gel were carefully defined for all of the study’s participants. Different conversion schemes for comparing the results obtained with the different measurement setups are presented here and critically discussed. The procedure proposed in this paper ensured a reasonable comparability of the results with a coefficient of variation for the yield stress of 27% and for the plastic viscosity of 24%, despite the individual measurement series’ having been performed in different labs with different rheometers and measurement geometries.
AU - Haist, Michael
AU - Link, Julian
AU - Nicia, David
AU - Leinitz, Sarah
AU - Baumert, Christian
AU - von Bronk, Tabea
AU - Cotardo, Dario
AU - Eslami Pirharati, Mahmoud
AU - Fataei, Shirin
AU - Garrecht, Harald
AU - Gehlen, Christoph
AU - Hauschildt, Inga
AU - Ivanova, Irina
AU - Jesinghausen, Steffen
AU - Klein, Christopher
AU - Krauss, Hans-W.
AU - Lohaus, Ludger
AU - Lowke, Dirk
AU - Mazanec, Oliver
AU - Pawelczyk, Sebastian
AU - Pott, Ursula
AU - Radebe, Nonkululeko W.
AU - Riedmiller, Joachim Jürgen
AU - Schmid, Hans-Joachim
AU - Schmidt, Wolfram
AU - Secrieru, Egor
AU - Stephan, Dietmar
AU - Thiedeitz, Mareike
AU - Wilhelm, Manfred
AU - Mechtcherine, Viktor
ID - 24182
JF - Materials and Structures
SN - 1359-5997
TI - Interlaboratory study on rheological properties of cement pastes and reference substances: comparability of measurements performed with different rheometers and measurement geometries
ER -
TY - JOUR
AU - Moritzer, Elmar
AU - Wortmann, M.
AU - Sabantina, L.
AU - Klocker, M.
AU - Mirasol, JR
ID - 24183
IS - 50
JF - JOURNAL OF INDUSTRIAL TEXTILES
TI - Stabilization of polyacrylonitrile nanofiber mats obtained by needleless electrospinning using dimethyl sulfoxide as solvent
ER -
TY - JOUR
AU - Moritzer, Elmar
AU - Mühlhoff, Frederik Marvin
AU - Krampe, Erhard
AU - Lochbaum, Ella
ID - 24184
IS - 07/20
JF - Plastverarbeiter
TI - 2K-Haftverbunde aus originär inkompatiblen Kunststoffen
ER -
TY - CONF
AU - Moritzer, Elmar
AU - Kartelmeyer, Stephan
AU - Hüttemann, Vincent
ID - 24201
T2 - Direct Digital Manufacturing Conference 2020
TI - Additive Manufactured Heat Pipe Injection Mould Element
ER -
TY - CONF
AU - Moritzer, Elmar
AU - Hillemeyer, Johannes
ID - 24203
T2 - 6. Fachkonferenz 3D-Druck in der Automobielindustrie
TI - Additiveteile Direktverschrauben
ER -
TY - GEN
AU - Schöppner, Volker
AU - Dörner, M.
AU - Marschik, C.
ID - 24204
TI - ANALYSIS OF THE ADVANTAGEOUS PROCESS AND MIXING BEHAVIOUR OF WAVE-DISPERSION SCREWS IN SINGLE SCREW EXTRUSION
ER -
TY - CONF
AU - Moritzer, Elmar
AU - Hillemeyer, Johannes
ID - 24206
T2 - 10. Gemeinschaftskolloquium
TI - Ansatz zur sicheren Direktverschraubung additiv gefertigter Einschraubtuben
ER -
TY - JOUR
AU - Schöppner, Volker
AU - Dörner, M.
AU - Marschik, C.
AU - Roland, W.
AU - Schaufler, S.
AU - Steinbichler, G.
ID - 24207
IS - 12(9)
JF - Polymers
TI - Application of Network Analysis to Flow Systems with Alternating Wave Channels: Part B. (Superimposed Drag-Pressure Flows in Extrusion)
ER -
TY - CONF
AU - Moritzer, Elmar
AU - Wittke, M.
ID - 24213
T2 - Annual Technical Conference of the Society of Plastics Engineers (ANTEC) 2020
TI - CONTEXT OF FIBER LENGTH DISTRIBUTION, HOMOGENEITY AND MECHANICAL PROPERTIES IN DIRECT COMPOUNDING INJECTION MOLDING OF FIBER REINFORCED THERMOPLASTICS
ER -
TY - CONF
AU - Moritzer, Elmar
AU - Krassmann, Dimitri
ID - 24228
T2 - 73rd Annual Assembly of the International Institute of Welding (IIW)
TI - Development of a New Joining Technology for Hybrid Joints of Sheet Metal and Continuous Fiber-Reinforced Thermoplastics
ER -
TY - JOUR
AU - Schöppner, Volker
AU - Dörner, M.
AU - Marschik, C.
AU - Steinbichler, G.
ID - 24231
JF - Polymers
TI - Development of an Analytical Model to Describe the Disperse Melting in Wave-Dispersion Screws
ER -
TY - JOUR
AU - Moritzer, Elmar
AU - Jilg, J.
AU - Schilp, C.
AU - Krempl, N.
AU - Friesenbichler, W.
ID - 24232
JF - Kunststoffe
TI - Die Kunst der Entformung
ER -
TY - JOUR
AU - Moritzer, Elmar
AU - Hopp, Matthias
AU - Wittke, Marius
ID - 24233
JF - WAK Jahreszeitschrift
TI - EINSATZ VON MASCHINELLEM LERNEN FÜR DIE REZYKLAT-VERARBEITUNG
ER -
TY - JOUR
AU - Moritzer, Elmar
AU - Krassmann, Dimitri
ID - 24234
JF - Joining Plastics
TI - Entwicklung einer neuartigen Fügetechnik für Organoblech-Hybridverbindungen
ER -
TY - CONF
AU - Moritzer, Elmar
AU - Krassmann, Dimitri
AU - Brikmann, Johannes
ID - 24235
T2 - 10. Fügetechnisches Gemeinschaftskolloquium
TI - Entwicklung eines Spritzgießsonderverfahrens zur Herstellung von Hybridbauteilen aus faserverstärkten Thermoplasten und Metallblechen
ER -
TY - CONF
AU - Moritzer, Elmar
AU - Kartelmeyer, S.
AU - Hüttemann, M.
AU - Jaroschek, C.
ID - 24237
T2 - 78th Annual Technical Conference for Plastics Professionals (ANTEC)
TI - INJECTION MOLD COOLED WITH ADDITIVE MANUFACTURED HEAT PIPE CORE-ELEMENT
ER -
TY - CONF
AU - Moritzer, Elmar
AU - Mühlhoff, Frederik Marvin
ID - 24238
T2 - Annual Technical Conference of the Society of Plastics Engineers (ANTEC) 2020
TI - Inline Surface Activation in the multi Injection Molding Process
ER -
TY - JOUR
AU - Moritzer, Elmar
AU - Mühlhoff, Frederik Marvin
AU - Lochbaum, Ella
AU - Krampe, Erhard
ID - 24239
JF - KGK - Rubberpoint
TI - InMould-Plasma Technologie - Dauerhaft beständige 2K-Verbunde aus originär inkompatiblen Kunststoffen
ER -
TY - JOUR
AU - Rasche, David B.
AU - Tigges, Lena
AU - Schmid, Hans-Joachim
ID - 24240
JF - Review of Scientific Instruments
SN - 0034-6748
TI - An apparatus to synthesize ceramic nanoparticles with a precisely adjusted temperature history and a significant mass output
ER -
TY - JOUR
AB - For gas phase nanoparticle production, hot wall reactors are widely used. In this article, we will describe the fundamental design considerations for a hot wall reactor system able to produce oxide nanoparticles. The system is outstanding in its ability to produce mostly spherical nanoparticles at particle sizes of up to 100 nm and even larger at mass outputs in the order of grams per hour by being able to rapidly quench the aerosol. While high production rates or larger particle sizes are already easily obtained with hot wall reactors, it is very challenging to produce these spherical particles at high mass rates. We will show in this research that the temperature and the particle number concentration are the major aspects influencing the particle morphology at the end of the process. Investigation on the performance of the setup shows good control over the temperature and the particle production stability. A representative particle characterization using SEM and scanning mobility particle sizer showed that particles are mostly spherical, while the particle size distribution had a geometric standard deviation close to 1.5. In addition to the aspects mentioned above, a possibility to manipulate the aggregation downstream of the reactor is to be presented as well. We found that applying electrical charges to the aerosol particles (in opposite polarity) can significantly foster aggregation.
AU - Rasche, David B.
AU - Tigges, Lena
AU - Schmid, Hans-Joachim
ID - 24241
JF - Review of Scientific Instruments
TI - An Apparatus to Synthesize Ceramic Nanoparticles with a Precisely Adjusted Temperature History and a Significant Mass Output
VL - 91
ER -
TY - CONF
AU - Moritzer, Elmar
AU - Hirsch, André
AU - Dalmer, C.
ID - 24242
T2 - Additive Manufacturing in Products and Applications (AMPA)
TI - Investigation of Plastic Freeformed, Open-Pored Structures with Regard to Producibility, Reproducibility and Liquid Permeability
ER -
TY - JOUR
AU - Moritzer, Elmar
AU - Mühlhoff, Frederik Marvin
AU - Krampe, Erhard
ID - 24246
IS - 5
JF - Kunststoff + Verarbeitung
TI - Kostensenkung beim Mehrkomponenten-Spritzgießen
ER -
TY - JOUR
AU - Moritzer, Elmar
AU - Mühlhoff, Frederik Marvin
AU - Krampe, Erhard
AU - Böhnke, Birte
ID - 24248
JF - Kunststoffe
TI - Mehr Materialkombinationen, weniger Kosten
ER -
TY - JOUR
AU - Moritzer, Elmar
AU - Wittke, M.
ID - 24249
JF - MNWP Magazin
TI - Metallsubstitution durch Spritzgießtechnik gerät allmählich in Reichweite
ER -
TY - JOUR
AU - Moritzer, Elmar
AU - Mühlhoff, Frederik Marvin
AU - Krampe, Erhard
AU - Böhnke, Birte
ID - 24250
JF - Kunststoffe international
TI - More Material Combinations, Lower Costs
ER -
TY - CONF
AU - Moritzer, Elmar
AU - Krassmann, Dimitri
ID - 24251
T2 - DVS Congress 2020
TI - Neuartige Fügetechnik für Organoblech-Hybridverbindungen
ER -
TY - JOUR
AU - Moritzer, Elmar
AU - Wittke, M.
ID - 24252
JF - Plastverarbeiter
TI - Neue Maßstäbe in puncto Festigkeit und Faserlänge
ER -
TY - JOUR
AU - Moritzer, Elmar
AU - Mühlhoff, Frederik Marvin
AU - Krampe, Erhard
AU - Böhnke, Birte
ID - 24253
JF - adhesion ADHESIVES + SEALANTS
TI - Plasma technology rationalizes 2-component processes
ER -
TY - JOUR
AU - Moritzer, Elmar
AU - Mühlhoff, Frederik Marvin
AU - Krampe, Erhard
AU - Böhnke, Birte
ID - 24256
IS - 10
JF - adhäsion KLEBEN & DICHTEN
TI - Plasma-Technologie zur Rationalisierung von 2K-Prozessen
ER -
TY - GEN
ED - Moritzer, Elmar
ED - Budde, Christopher
ED - Hüttner, Matthias
ED - Krassmann, Dimitri
ID - 24259
TI - Spritznieten als neue Organoblech-Metall-Hybridfügetechnik
ER -
TY - CONF
AU - Moritzer, Elmar
AU - Schumacher, C.
ID - 24260
T2 - 4th International Conference Progress on Polymers and Composites Products and Manufacturing Technologies (POLCOM)
TI - Stainless steel parts produced by Fused Deposition Modeling and a sintering process compared to components manufactured in Selective Laser Melting
ER -
TY - JOUR
AU - Vogtschmidt, Sascha
AU - Fiebig, Isabel
AU - Schöppner, Volker
ID - 24312
IS - 3-4
JF - Joining Plastics
TI - Wechseldehnungsschweißen - Entwicklung einer Fügetechnologie für 3D-Geometrien
ER -
TY - CONF
AU - Malatyali, Hatice
AU - Schöppner, Volker
AU - Behrendt, Alexander
AU - Hoemann, Theresa
AU - Sporkmann, Frederick
AU - Hanselle, Felix
ID - 24317
T2 - SPE ANTEC
TI - Differences between the recycled carbon fibers especially regarding the product quality,
ER -
TY - CONF
AU - Vogtschmidt, Sascha
AU - Schöppner, Volker
ID - 24318
T2 - DVS CONGRESS 2020 - Große Schweißtechnische Tagung
TI - Wechseldehnungsschweißen - Entwicklung einer Fügetechnologie für 3D-Geometrien
VL - 365
ER -
TY - JOUR
AU - Vogtschmidt, Sascha
AU - Schöppner, Volker
ID - 24321
JF - Welding in the World
TI - Vibration welding of components with angled areas in the direction of vibration
VL - 64
ER -
TY - JOUR
AU - Vogtschmidt, Sascha
AU - Schöppner, Volker
ID - 24324
IS - 3-4
JF - Joining Plastics
TI - Schweißnahtkennwerte für die lebensdaueroptimierte Bauteilauslegung von hochtemperaturbeständigen Thermoplasten
ER -
TY - CONF
AU - Krebs, Benjamin
ID - 24373
IS - 21233
T2 - Academy of Management Proceedings
TI - Antecedents and Performance Consequences of High-Potential Scheme Use
VL - 1
ER -
TY - GEN
AU - Arndt, Theresa
AU - Schöppner, Volker
ID - 24385
T2 - Joining Plastics
TI - Kunststofftechnik Paderborn: Entwicklung von Scale-Up-Regeln für das quasisimultane Laserdurchstrahlschweißen von Thermoplasten
ER -
TY - GEN
AU - Arndt, Theresa
AU - Schöppner, Volker
ID - 24386
T2 - K-Zeitung
TI - Wenn Regeln Potenziale freisetzen
ER -
TY - GEN
AU - Arndt, Theresa
AU - Schöppner, Volker
ID - 24387
T2 - PhotonicsViews
TI - Quasi-Simultaneous Laser Transmission Welding
ER -