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 -