TY - CONF
AB - Embedded systems require a high energy efficiency in combination with an optimized performance. As such, Bit Manipulation Instructions (BMIs) were introduced for x86 and ARMv8 to improve the runtime efficiency and power dissipation of the compiled software for various applications. Though the RISC-V platform is meanwhile widely accepted for embedded systems application, its instruction set architecture (ISA) currently still supports only two basic BMIs.We introduce ten advanced BMIs for the RISC-V ISA and implemented them on Berkeley's Rocket CPU [1], which we synthesized for the Artix-7 FPGA and the TSMC 65nm cell library. Our RISC-V BMI definitions are based on an analysis and combination of existing x86 and ARMv8 BMIs. Our Rocket CPU hardware extensions show that RISC-V BMI extensions have no negative impact on the critical path of the execution pipeline. Our software evaluations show that we can, for example, expect a significant impact for time and power consuming cryptographic applications.
AU - Koppelmann, Bastian
AU - Adelt, Peer
AU - Müller, Wolfgang
AU - Scheytt, Christoph
ID - 24058
T2 - 29th International Symposium on Power and Timing Modeling, Optimization and Simulation (PATMOS)
TI - RISC-V Extensions for Bit Manipulation Instructions
ER -
TY - CONF
AB - We present a complete Visible Light Communication (VLC) system for experimental Vehicular VLC (V-VLC) research activities. Visible light is becoming an important technology complementing existing Radio Frequency (RF) technologies such as Cellular V2X (C-V2X) and Dedicated Short Range Communication (DSRC). In this scope, first works helped introducing new simulation models to explore V-VLC capabilities, technologies, and algorithms. Yet, experimental prototypes are still in an early phase. We aim bridging this gap with our system, which integrates a custom-made driver hardware, commercial vehicle light modules, and an Open Source signal processing implementation in GNU Radio, which explicitly offers rapid prototyping. Our system supports OFDM with a variety of Modulation and Coding Schemes (MCS) and is compliant to IEEE 802.11; this is in line with the upcoming IEEE 802.11 LC standard as well. In an extensive series of experiments, we assessed the communication performance by looking at realistic inter vehicle distances. Our results clearly show that our system supports even higher order MCS with very low error rates over long distances.
AU - Amjad, Muhammad Sohaib
AU - Tebruegge, Claas
AU - Memedi, Agon
AU - Kruse, Stephan
AU - Kress, Christian
AU - Scheytt, Christoph
AU - Dressler, Falko
ID - 24059
T2 - IEEE International Conference on Communications (ICC)
TI - An IEEE 802.11 Compliant SDR-Based System for Vehicular Visible Light Communications
ER -
TY - CONF
AB - In diesem Artikel stellen wir eine Methode zur nicht-invasiven dynamischen Speicher- und IO-Analyse mit QEMU für sicherheitskritische eingebettete Software für die RISC-V Befehlssatzarchitektur vor. Die Implementierung basiert auf einer Erweiterung des Tiny Code Generator (TCG) des quelloffenen CPU-Emulators QEMU um die dynamische Identifikation von Zugriffen auf Datenspeicher sowie auf an die CPU angeschlossene IO-Geräte. Wir demonstrieren die Funktionalität der Methode anhand eines Versuchsaufbaus, bei dem eine Schließsystemkontrolle mittels serieller UART-Schnittstelle an einen RISC-V-Prozessor angebunden ist. Dieses Szenario zeigt, dass ein unberechtigter Zugriff auf die UART-Schnittstelle frühzeitig aufgedeckt und ein Angriff auf eine Zugangskontrolle somit endeckt werden kann.
AU - Adelt, Peer
AU - Koppelmann, Bastian
AU - Müller, Wolfgang
AU - Scheytt, Christoph
ID - 24060
SN - 978-3-8007-4945-4
T2 - MBMV 2019-22.Workshop Methoden und Beschreibungssprachen zur Modellierung und Verifikation von Schaltungen und Systemen (MBMV 2019)
TI - Analyse sicherheitskritischer Software für RISC-V Prozessoren
ER -
TY - CONF
AU - Adelt, Peer
AU - Koppelmann, Bastian
AU - Müller, Wolfgang
AU - Scheytt, Christoph
AU - Driessen, Benedikt
ID - 24061
T2 - 2nd International Workshop on Embedded Software for Industrial IoT in conjunction with DATE 2019
TI - QEMU for Dynamic Memory Analysis of Security Sensitive Software
ER -
TY - JOUR
AB - It its current Version 3.1.0 QEMU supports RISC-V RV32GC and RV64GC software emulation in user and full system mode. We will first give an overview of the current state of the QEMU RISC-V implementation. Thereafter, we will present the DecodeTree tool, which will be available with the next QEMU release. DecodeTree is a code generator included in QEMU that can generate the program logic for extracting and decoding opcodes and operands from a formal instruction list of the target architecture. This enables the structured implementation of just-in-time compilations to guarantee that the QEMU implementation meets the ISA specification. As such, we completely replaced the existing RISC-V RV32GC and RV64GC implementations by DecodeTree generations in the next official QEMU release, which is expected in spring 2019. We will demonstrate the DecodeTree applications by the example of RISC-V ISA subset configurations.
AU - Adelt, Peer
AU - Koppelmann, Bastian
AU - Müller, Wolfgang
AU - Scheytt, Christoph
ID - 24063
JF - 2nd International Workshop on RISC-V Research Activities
TI - QEMU Support for RISC-V: Current State and Future Releases
VL - (Presentation)
ER -
TY - CHAP
AU - Hoyer, Kay-Peter
AU - Schaper, Mirko
ID - 24097
SN - 2367-1181
T2 - TMS 2019 148th Annual Meeting & Exhibition Supplemental Proceedings
TI - Alloy Design for Biomedical Applications in Additive Manufacturing
ER -
TY - CHAP
AU - Tasche, Lennart
AU - Hoyer, Kay-Peter
AU - Zhuravlev, Evgeny
AU - Grundmeier, Guido
AU - Schaper, Mirko
AU - Keßler, Olaf
ID - 24098
SN - 2367-1181
T2 - TMS 2019 148th Annual Meeting & Exhibition Supplemental Proceedings
TI - Surface Inoculation of Aluminium Powders for Additive Manufacturing Guided by Differential Fast Scanning Calorimetry
ER -
TY - GEN
ED - Eiber, Marion
ID - 24102
SN - 2509-8772
TI - Einfluss von Eigenspannungen und Oberflächenrauheit additiv gefertigter Komponenten aus 316L auf die Beschichtbarkeit und Ermüdungsfestigkeit,
ER -
TY - GEN
ED - Azarmi, Fardad
ID - 24103
SN - 9781510888005
TI - Adhesion of HVOF sprayed WC-Co coatings on additively processed 316L
ER -
TY - JOUR
AU - Inguva, Venkatesh
AU - Graceffa, Rita
AU - Schulz, Joachim
AU - Bilsel, Osman
AU - Perot, Blair J.
ID - 24122
JF - Journal of Mechanical Science and Technology
SN - 1738-494X
TI - Creating round focused micro-jets from rectangular nozzles
ER -
TY - CONF
AU - König, Jonas
AU - Malberg, Simon
AU - Martens, Martin
AU - Niehaus, Sebastian
AU - Krohn-Grimberghe, Artus
AU - Ramaswamy, Arunselvan
ID - 24141
T2 - Science and Information Conference
TI - Multi-stage reinforcement learning for object detection
ER -
TY - JOUR
AU - Knoke, Torben
AU - Kronberg, Alexander
AU - Glushenkov, Maxim
AU - Kenig, Eugeny
ID - 24272
IS - 5
JF - Applied Thermal Engineering
SN - 1359-4311
TI - On the design of heat exchanger equipment for novel-type isobaric expansion engines
VL - 167
ER -
TY - CONF
AU - Malatyali, Hatice
AU - Schöppner, Volker
ID - 24319
T2 - 27. Fachtagung Technomer
TI - Untersuchung des Dosierverhaltens von Carbonfaserrezyklaten für den Einsatz im gleichläufigen Doppel-schneckenextruder
ER -
TY - CONF
AU - Malatyali, Hatice
AU - Schöppner, Volker
AU - Tillmann, Wolfgang
AU - Kokalj, David
ID - 24322
T2 - SPE ANTEC
TI - Deveploment of thin film sensors: The influence of layer variation on the measurement quality for inline melt temperature measurements
ER -
TY - CONF
AU - Vogtschmidt, Sascha
AU - Schöppner, Volker
ID - 24326
TI - Vibration welding of components with angled areas in the direction of vibration
ER -
TY - CONF
AB - Liquid atomization is expected to be a key process in Flame Spray Pyrolysis, as it determines the primary droplet size and velocity distribution, which represent initial conditions for flame shape and temperature field. A well-defined manipulation of atomization may be achieved by variation of nozzle geometry, injection parameter or fluid properties. However, change of fluid properties, e.g. varying solvents or increasing the precursor concentration, also influences the final particle properties. In this work, the influence of precursor concentration on fluid properties, spray and particle formation in Flame Spray Pyrolysis is experimentally investigated. High-speed shadowgraphy and Phase-Doppler measurements are conducted in a semi-closed combustion chamber with a well-defined burner geometry (SpraySyn burner) that is based on a coaxial atomization principle. By adding precursor to the flammable solvent, resulting spray characteristics, flame shape and appearance are changed in color, shape and mean droplet size distribution. Compared to resulting mean droplet sizes of pure solvent mixtures (D32, 22 μm), mean droplet sizes in the center of the precursor flame at 30 mm above the burner are generally smaller (D32, 18 μm). Persisting high share of small droplets in the droplet size distribution are presented, that presumably origin from an accumulation of metal organic precursor at the droplet surface during combustion, that acts as a diffusive barrier for high volatility solvent and thus reduces droplet evaporation. Sufficiently high above the nozzle exit, increasing the precursor concentration does not affect the radial distribution of mean droplet sizes but leads to increased mean particle sizes. More precursor presumably leads to higher concentrations of prime particles in the flame, thus probability of particle collusion and agglomeration. High-speed imaging at nozzle exit revealed random fluctuations of initial jet diameter, paired with jet axis shifting around 1000 Hz. These superposed fluctuations determine the initial conditions for atomization, induce pulsations in the flame and thus initiate the entire chain of the particle synthesis process.
AU - Bieber, M.
AU - Tischendorf, R.
AU - Reddemann, M.
AU - Schmid, H.-J.
AU - Kneer, R.
ID - 24502
KW - FSP
KW - nanoparticle synthesis
KW - in situ measurements
TI - Influence of precursor concentration on spray and particle formation in flame spray pyrolysis
ER -
TY - GEN
AU - Menge, Dennis
AU - Walter, Rolf
AU - Schmid, Hans-Joachim
AU - Breuer, Ulf Paul
ID - 24628
TI - FVA-Nr. 813 I - Generative Verfahren zur Herstellung von Polymerbauteilen
VL - 1338
ER -
TY - JOUR
AB - Prerequisite for an efficient cooling energy system is the knowledge and optimal combination of different operating conditions of individual compression and free cooling chillers. The performance of cooling systems depends on their part-load performance and their condensing temperature, which are often not continuously measured. Recorded energy data remain unused, and manufacturers’ data differ from the real performance. For this purpose, manufacturer and real data are combined and continuously adapted to form part-load chiller models. This study applied a predictive optimization algorithm to calculate the optimal operating conditions of multiple chillers. A sprinkler tank offers the opportunity to store cold-water for later utilization. This potential is used to show the load shifting potential of the cooling system by using a variable electricity price as an input variable to the optimization. The set points from the optimization have been continuously adjusted throughout a dynamic simulation. A case study of a plastic processing company evaluates different scenarios against the status quo. Applying an optimal chiller sequencing and charging strategy of a sprinkler tank leads to electrical energy savings of up to 43%. Purchasing electricity on the EPEX SPOT market leads to additional costs savings of up to 17%. The total energy savings highly depend on the weather conditions and the prediction horizon.
AU - Peesel, Ron-Hendrik
AU - Schlosser, Florian
AU - Meschede, Henning
AU - Dunkelberg, Heiko
AU - Walmsley, Timothy
ID - 24632
JF - Energies
SN - 1996-1073
TI - Optimization of Cooling Utility System with Continuous Self-Learning Performance Models
ER -
TY - JOUR
AU - Schlosser, Florian
AU - Seevers, Jan-Peter
AU - Peesel, Ron-Hendrik
AU - Walmsley, Timothy Gordon
ID - 24633
JF - Energy
SN - 0360-5442
TI - System efficient integration of standby control and heat pump storage systems in manufacturing processes
ER -
TY - JOUR
AB - For increased total site heat integration, the optimal sizing and robust operation of a heat recovery loop (HRL) are prerequisites for economic efficiency. However, sizing based on one representative time series, not considering the variability of process streams due to their discontinuous operation, often leads to oversizing. The sensitive evaluation of the performance of an HRL by Monte Carlo (MC) simulation requires sufficient historical data and performance models. Stochastic time series are generated by distribution functions of measured data. With these inputs, one can then model and reliably assess the benefits of installing a new HRL. A key element of the HRL is a stratified heat storage tank. Validation tests of a stratified tank (ST) showed sufficient accuracy with acceptable simulation time for the variable layer height (VLH) multi-node (MN) modelling approach. The results of the MC simulation of the HRL system show only minor yield losses in terms of heat recovery rate (HRR) for smaller tanks. In this way, costs due to oversizing equipment can be reduced by better understanding the energy-capital trade-off.
AU - Schlosser, Florian
AU - Peesel, Ron-Hendrik
AU - Meschede, Henning
AU - Philipp, Matthias
AU - Walmsley, Timothy
AU - Walmsley, Michael
AU - Atkins, Martin
ID - 24634
JF - Energies
SN - 1996-1073
TI - Design of Robust Total Site Heat Recovery Loops via Monte Carlo Simulation
ER -
TY - CONF
AU - Schlosser, Florian
AU - Arpagaus, Cordin
AU - Walmsley, Timothy G.
ID - 24638
T2 - Chemical Engineering Transactions
TI - Heat Pump Integration by Pinch Analysis for Industrial Applications: A Review
VL - 76
ER -
TY - CONF
AU - Seevers, Jan-Peter
AU - Schlosser, Florian
ID - 24639
T2 - Chemical Engineering Transactions
TI - Integration of Heat Pump Storage Systems in Manufacturing Systems via Data Farming and Monte Carlo Simulation
VL - 76
ER -
TY - CONF
AU - Selleneit, Volker
AU - Stockl, Martin
AU - Philipp, Matthias
AU - Mast, Tanja
AU - Schlosser, Florian
ID - 24640
T2 - Chemical Engineering Transactions
TI - System Efficiency Rating of Industrial Utilities in Electricity Grids with a high share of Variable Renewable Energies
VL - 76
ER -
TY - CONF
AU - Moritzer, Elmar
AU - Mühlhoff, Frederik Marvin
AU - Nordmeyer, T.
AU - Böhnke, Birte
AU - Krampe, Erhard
AU - Asad, Salman
ID - 25638
T2 - Eröffnung Plasma-Campus bei Plasmatreat GmbH
TI - InMould-Plasma
ER -
TY - JOUR
AU - Moritzer, Elmar
AU - Jilg, J.
AU - Sibbe, N.
ID - 25639
JF - PU MAGAZIN - International
TI - Investigation of the bond strength between injection moulded TPU and a reactive, castable polyurethane mass (PU)
ER -
TY - JOUR
AU - Moritzer, Elmar
AU - Jilg, J.
AU - Sibbe, N.
ID - 25640
IS - 4
JF - TPE Magazine international
TI - Investigation of the bond strength between injection moulded TPU and a reactive, castable polyurethane mass (PU)
ER -
TY - CONF
AU - Moritzer, Elmar
AU - Hüttner, Matthias
AU - Krassmann, Dimitri
AU - Wittke, Marius
ID - 25689
T2 - Werkstoffwoche
TI - Lebensdauer von Composites und Composite-Metall-Hybridverbindungen
ER -
TY - BOOK
AU - Tobias Jenert, Gabi Reinmann, Tobias Schmohl
ID - 25734
KW - Hochschulbildung
KW - Bildungsforschung
KW - Hochschuldidaktik
KW - Hochschulbildung
KW - Hochschuldidaktik
KW - Forschung
KW - Lehren
KW - Hochschule
KW - Lehre
KW - Lernen
SN - 978-3-658-20309-2
TI - Hochschulbildungsforschung. Theoretische, methodologische und methodische Denkanstöße für die Hochschuldidaktik
ER -
TY - JOUR
AU - Brahm, T.
AU - Jenert, T.
ID - 25735
IS - 4
JF - Journal of Management Education
TI - Untangling Faculty Misinformation From an Educational Perspective: Rejoinder to ?The Menace of Misinformation: Faculty Misstatements in Management Education and Their Consequences?
VL - 43
ER -
TY - CONF
AU - Schöppner, Volker
AU - Bayazian, H.
AU - Yadegari, Ali
ID - 25736
T2 - 77th Annual Technical Conference of the Society of Plastics Engineers (ANTEC)
TI - Morphology Development in LLDPE Stretch Films Prepared with Different Cast Film Process Parameters
ER -
TY - CONF
AU - Schöppner, Volker
AU - Sporkmann, F.
AU - Heide, Alexander
ID - 25737
T2 - 35th International Conference of the Polymer Processing Society (PPS)
TI - New Analytical Approach to Calculate the Melt Flow within The Co-Rotating Twin Screw Extruder by Using the Performance Mapping Method
ER -
TY - CONF
AU - Moritzer, Elmar
AU - Budde, Christopher
AU - Hüttner, Matthias
AU - Krassmann, Dimitri
ID - 25738
T2 - 9. Fügetechnisches Gemeinschaftskolloquium
TI - Nieten im Spritzgießprozess zur Verbindung von Hybridbauteilen aus Organoblechen und Metallen
ER -
TY - CONF
AU - Moritzer, Elmar
AU - Hirsch, André
ID - 25745
T2 - DGM-Seminar für Fortgeschrittene
TI - Oberflächennachbearbeitung und Kleben von FDM-Bauteilen
ER -
TY - CONF
AU - Schöppner, Volker
AU - Bayazian, H.
AU - Yadegari, Ali
AU - Haddad, Hoda
ID - 25746
T2 - 35th PPS
TI - Orientation in LLDPE Cast Films Manufactured under Different Processing Parameters
ER -
TY - CONF
AU - Moritzer, Elmar
AU - Westhues, T.
ID - 25747
T2 - 35th PPS
TI - Plant Design, Stress-Strain Characteristics in Compression and Lifecycle Description of Coiled Filament Mats Based on Production According to Fitzer
ER -
TY - JOUR
AU - Moritzer, Elmar
AU - Hirsch, André
AU - Heim, H.-P.
AU - Cherif, C.
AU - Truemper, W.
ID - 25748
JF - Welding in the World
SN - 1878-6669
TI - Plastic droplet welding: bond strength between plastic freeforming structures and continuous fiber-reinforced thermoplastic composites
ER -
TY - CONF
AU - Schöppner, Volker
AU - Sporkmann, F.
ID - 25750
T2 - VDI Wissensforum
TI - Scale up von Doppelschneckenmaschinen
ER -
TY - BOOK
AU - Schöppner, Volker
AU - Meilwes, P.
AU - Westhues, K.
ID - 25751
SN - 978-3-939382-14-0
TI - Schmelzefilter
ER -
TY - JOUR
AU - Schöppner, Volker
AU - Sporkmann, F.
ID - 25753
JF - Compounding World
SN - 2053-7174
TI - Simulation aids compounding success
ER -
TY - JOUR
AU - Schöppner, Volker
AU - Brüning, Florian
ID - 25754
JF - WAK Jahresmagazin
SN - 1618-8357
TI - Simulation der Feststoffförderung im Einschneckenextruder
ER -
TY - CONF
AU - Moritzer, Elmar
AU - Wittke, M.
ID - 25755
T2 - 77th Annual Technical Conference of the Society of Plastics Engineers (ANTEC)
TI - Simulation-based Optimization of Advanced Mixing Elements on Single Screw Extruders
ER -
TY - CONF
AU - Moritzer, Elmar
AU - Kartelmeyer, S.
AU - Hüttemann, B.
AU - Jaroschek, C.
ID - 25756
T2 - 26. Fachtagung über Verarbeitung und Anwendung von Polymeren
TI - Spritzgießwerkzeuge mit Heatpipe-Temperierung
ER -
TY - JOUR
AU - Moritzer, Elmar
AU - Jilg, J.
AU - Sibbe, N.
ID - 25757
JF - PU MAGAZIN
TI - Untersuchung der Verbundhaftung zwischen spritzgegossenen TPUs und einer reaktiven, gießfähigen Polyurethanmasse
ER -
TY - CONF
AU - Schöppner, Volker
AU - Westhues, K.
ID - 25759
T2 - VDI Wissensforum
TI - Vortrag „Aufschmelzen“ Optimierter Betrieb und Scale-up von Doppelschnecken-Extrudern
ER -
TY - CONF
AU - Moritzer, Elmar
AU - Jilg, J.
ID - 25760
SN - 978-3-939382-14-0
T2 - 26. Fachtagung über Verarbeitung und Anwendung von Polymeren
TI - Zur Wirkung dehnströmungsinduzierender Spritzgießdüsen für glasfaserverstärktes Polypropylen im Sonderverfahren der Spritzgießdirektcompoundierung (SGDC)
ER -
TY - JOUR
AU - Büchel, Daniel
AU - Jakobsmeyer, Rasmus
AU - Döring, Michael
AU - Adams, Michael
AU - Rückert, Ulrich
AU - Baumeister, Jochen
ID - 26015
JF - International Journal of Performance Analysis in Sport
SN - 2474-8668
TI - Effect of playing position and time on-court on activity profiles in german elite team handball
ER -
TY - CHAP
AB - Since, in the presence of humidity the inter-particle processes are dominated by capillary forces, a fundamental understanding of the water adsorption and the capillary bridge formation is very important. However, the adsorbed water structure and thus the capillary bridge formation is influenced by various parameters like the particle morphology (e.g. particle size, roughness) as well as the surface chemistry (surface energy, adsorbate structure) and therefore needs to be analyzed on a submicroscopic or even molecular basis. A multi-scale approach ranging from experiments on an individual particle level (AFM and liquid bridge simulation) and investigations on small particle ensembles (combined QCM-D/FTIR) up to macroscopic description of bulk behavior is presented in this chapter. In this context, the combined in situ QCM-D/FTIR experiments are bridging the gap between experiments on an individual particle level and macroscopic bulk behavior. Variation of surface chemistry by means of adsorption of functional organic molecules allows for the correlation of macroscopic particle behavior to nanoscopic effects like the presence and structure of adsorbate layers as well as the formation of capillary bridges while keeping the disperse properties constant. Besides extensive experimental work, simulations of capillary bridges formed by condensation from humid air are presented. It is clearly shown that well known approximations which have been introduced for micron-sized particles are not valid any more for nano-scaled particles. The forces between nanoparticles by static liquid bridges and their dependency on particle size, contact angle, humidity and interparticle distance are discussed in detail. Furthermore, capillary forces during separation of particles are studied thoroughly and a constitutive law based on a contact stiffness allows the transfer to DEM simulations of wet powders. Finally, it is demonstrated by comparison to Molecular Dynamics simulations, that the used continuum approach to simulate capillary bridges might even be used down to particle sizes of a few nanometers, if some additional effects are considered correctly.
AU - Schmid, Hans-Joachim
AU - Grundmeier, Guido
AU - Dörmann, Michael
AU - Orive, Alejandro González
AU - de los Arcos, Teresa
AU - Torun, Boray
ID - 26098
T2 - Particles in Contact
TI - Understanding and Manipulation of Nanoparticle Contact Forces by Capillary Bridges
ER -
TY - JOUR
AU - Santandrea, Matteo
AU - Stefszky, Michael
AU - Roeland, Ganaël
AU - Silberhorn, Christine
ID - 26224
JF - New Journal of Physics
SN - 1367-2630
TI - Characterisation of fabrication inhomogeneities in Ti:LiNbO3 waveguides
ER -
TY - JOUR
AU - Santandrea, Matteo
AU - Stefszky, Michael
AU - Silberhorn, Christine
ID - 26225
JF - Optics Letters
SN - 0146-9592
TI - General framework for the analysis of imperfections in nonlinear systems
ER -
TY - JOUR
AU - Santandrea, Matteo
AU - Stefszky, Michael
AU - Ansari, Vahid
AU - Silberhorn, Christine
ID - 26226
JF - New Journal of Physics
SN - 1367-2630
TI - Fabrication limits of waveguides in nonlinear crystals and their impact on quantum optics applications
ER -