TY - GEN A1 - Krämer, Stefan T1 - Effects of Arbitrary Hardware Faults on Multicore Scheduling in Safety-critical Applications – Evaluation by enhanced Markov models and discrete event simulation T2 - 2014 PESW - The 2nd Prague Embedded Systems Workshop, June 2014 Y1 - 2014 UR - https://pesw.fit.cvut.cz/2014/presentations/pesw2014_Kramer.pdf ER - TY - JOUR A1 - Joblin, Mitchell A1 - Apel, Sven A1 - Mauerer, Wolfgang T1 - Evolutionary trends of developer coordination: a network approach JF - Empirical Software Engineering N2 - Software evolution is a fundamental process that transcends the realm of technical artifacts and permeates the entire organizational structure of a software project. By means of a longitudinal empirical study of 18 large open-source projects, we examine and discuss the evolutionary principles that govern the coordination of developers. By applying a network-analytic approach, we found that the implicit and self-organizing structure of developer coordination is ubiquitously described by non-random organizational principles that defy conventional software-engineering wisdom. In particular, we found that: (a) developers form scale-free networks, in which the majority of coordination requirements arise among an extremely small number of developers, (b) developers tend to accumulate coordination requirements with more and more developers over time, presumably limited by an upper bound, and (c) initially developers are hierarchically arranged, but over time, form a hybrid structure, in which core developers are hierarchically arranged and peripheral developers are not. Our results suggest that the organizational structure of large projects is constrained to evolve towards a state that balances the costs and benefits of developer coordination, and the mechanisms used to achieve this state depend on the project’s scale. KW - Developer coordination KW - Developer networks KW - Software evolution Y1 - 2016 U6 - https://doi.org/10.1007/s10664-016-9478-9 VL - 22 IS - 4 SP - 2050 EP - 2094 PB - Springer ER - TY - CHAP A1 - Bauer, Gregor A1 - Grossmann, Benjamin A1 - Schlegl, Thomas A1 - Kobayashi, Hiroshi T1 - Modeling, identification and control of an antagonistically actuated joint for telerobotic systems T2 - IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society, 9-12 Nov. 2015, Yokohama, Japan N2 - Within this paper a modeling, identification and control technique for an antagonistically actuated joint consisting of two pneumatically actuated muscles is presented. The antagonistically actuated joint acts as a test bench for control architectures which are going to be used to control an exoskeleton within a telerobotic system. A static and dynamic model of the muscle and the joint is derived and the parameters of the models are identified using a least-squares algorithm. The control architecture, consisting of a inner pressure and an outer position controller is presented. The pressure controller is evaluated using switching valves compared against proportional valves. KW - DYNAMICS KW - FORCE KW - Muscles KW - Telerobotics KW - Torque KW - Valves Y1 - 2015 U6 - https://doi.org/10.1109/IECON.2015.7392676 SP - 3696 EP - 3701 PB - IEEE ER - TY - CHAP A1 - Ramsauer, Ralf A1 - Kiszka, Jan A1 - Lohmann, Daniel A1 - Mauerer, Wolfgang T1 - Look Mum, no VM Exits! (Almost) T2 - Proceedings of the 13th Annual Workshop on Operating Systems Platforms for Embedded Real-Time Applications (OSPERT '17) N2 - Multi-core CPUs are a standard component in many modern embedded systems. Their virtualisation extensions enable the isolation of services, and gain popularity to implement mixed-criticality or otherwise split systems. We present Jailhouse, a Linux-based, OS-agnostic partitioning hypervisor that uses novel architectural approaches to combine Linux, a powerful general-purpose system, with strictly isolated special-purpose components. Our design goals favour simplicity over features, establish a minimal code base, and minimise hypervisor activity. Direct assignment of hardware to guests, together with a deferred initialisation scheme, offloads any complex hardware handling and bootstrapping issues from the hypervisor to the general purpose OS. The hypervisor establishes isolated domains that directly access physical resources without the need for emulation or paravirtualisation. This retains, with negligible system overhead, Linux's feature-richness in uncritical parts, while frugal safety and real-time critical workloads execute in isolated, safe domains. KW - FOS: Computer and information sciences KW - Operating Systems (cs.OS) Y1 - 2017 UR - https://ospert2017.uni.lu/ U6 - https://doi.org/10.48550/arXiv.1705.06932 ER - TY - CHAP A1 - Picha, Petr A1 - Brada, Premek A1 - Ramsauer, Ralf A1 - Mauerer, Wolfgang T1 - Towards Architect’s Activity Detection through a Common Model for Project Pattern Analysis T2 - First International Workshop on the Social and Organization Dimensions of Software, 5-7 April 2017, Gothenburg, Sweden N2 - Software development projects leave a large amount of data in repositories of Application Lifecycle Management (ALM) tools. These data contain detailed histories of their respective projects, their results and decisions made along the way. Analysis of such data helps uncover various interesting facts about projects, e.g. their socio-technical structures and the actual (vs. purported) roles of team members. Based on experiences with tools supporting our research we are convinced that it is feasible to consolidate data from different ALM tools, tapping into the situation common in real-life projects. In this paper we report on our work towards a shared common data model and tool integration aimed at improved project analysis. We discuss how this can help in the identification of architects in the project organizational structures, their activity patterns and collaboration with other team roles. KW - data analysis KW - Data Models KW - project management KW - Software Architecture KW - software tools KW - team working Y1 - 2017 U6 - https://doi.org/10.1109/ICSAW.2017.46 SP - 175 EP - 178 PB - IEEE ER - TY - CHAP A1 - Ramsauer, Ralf A1 - Lohmann, Daniel A1 - Mauerer, Wolfgang ED - Wassermann, Tony T1 - Observing Custom Software Modifications: A Quantitative Approach of Tracking the Evolution of Patch Stacks T2 - Proceedings of the 12th International Symposium on Open Collaboration (OpenSym '16) N2 - Modifications to open-source software (OSS) are often provided in the form of "patch stacks" -- sets of changes (patches) that modify a given body of source code. Maintaining patch stacks over extended periods of time is problematic when the underlying base project changes frequently. This necessitates a continuous and engineering-intensive adaptation of the stack. Nonetheless, long-term maintenance is an important problem for changes that are not integrated into projects, for instance when they are controversial or only of value to a limited group of users. We present and implement a methodology to systematically examine the temporal evolution of patch stacks, track non-functional properties like integrability and maintainability, and estimate the eventual economic and engineering effort required to successfully develop and maintain patch stacks. Our results provide a basis for quantitative research on patch stacks, including statistical analyses and other methods that lead to actionable advice on the construction and long-term maintenance of custom extensions to OSS. KW - CADOS KW - collaboration KW - Linux KW - maintenance KW - patch stacks Y1 - 2016 U6 - https://doi.org/10.1145/2957792.2957810 SP - 1 EP - 4 PB - ACM CY - New York ER - TY - CHAP A1 - Joblin, Mitchell A1 - Mauerer, Wolfgang A1 - Apel, Sven A1 - Siegmund, Janet A1 - Riehle, Dirk T1 - From Developer Networks to Verified Communities: A Fine-Grained Approach T2 - 2015 IEEE/ACM 37th IEEE International Conference on Software Engineering, 16-24 May 2015, Florence, Italy N2 - Effective software engineering demands a coordinated effort. Unfortunately, a comprehensive view on developer coordination is rarely available to support software-engineering decisions, despite the significant implications on software quality, software architecture, and developer productivity. We present a fine-grained, verifiable, and fully automated approach to capture a view on developer coordination, based on commit information and source-code structure, mined from version-control systems. We apply methodology from network analysis and machine learning to identify developer communities automatically. Compared to previous work, our approach is fine-grained, and identifies statistically significant communities using order-statistics and a community-verification technique based on graph conductance. To demonstrate the scalability and generality of our approach, we analyze ten open-source projects with complex and active histories, written in various programming languages. By surveying 53 open-source developers from the ten projects, we validate the authenticity of inferred community structure with respect to reality. Our results indicate that developers of open-source projects form statistically significant community structures and this particular view on collaboration largely coincides with developers' perceptions of real-world collaboration. KW - collaboration KW - Computer languages KW - Measurement KW - Open Source Software KW - Software systems KW - Standards Y1 - 2015 SN - 978-1-4799-1934-5 U6 - https://doi.org/10.1109/icse.2015.73 SP - 563 EP - 573 PB - IEEE ER - TY - GEN A1 - Mauerer, Wolfgang T1 - Open Source in Research and Reality T2 - Open Source Summit North America and Embedded Linux Conference North America 2020 Y1 - 2020 UR - https://www.youtube.com/watch?v=L2iubyD1e7U ER - TY - VIDEO A1 - Mauerer, Wolfgang A1 - Wagner, Daniel T1 - Cyclic Tests Unleashed: Large-Scale RT Analysis with Jitterdebugger T2 - Open Source Summit, North America, 17.07.2019 Y1 - 2019 UR - https://www.youtube.com/watch?v=wNQ24TFjzCw ER - TY - GEN A1 - Ramsauer, Ralf A1 - Duda, Sebastian A1 - Mauerer, Wolfgang A1 - Bulwahn, Lukas T1 - The list is our process: An analysis of the kernel’s email-based development process T2 - Linux Plumbers Conference, Lisbon September 9, 2019 Y1 - 2019 UR - https://www.youtube.com/watch?v=QG1YDQ1HOKE ER - TY - VIDEO A1 - Mauerer, Wolfgang A1 - Ramsauer, Ralf T1 - Torturing Git for Fun and Profit T2 - Microsoft Developer Meetup Regensburg 02.04.2019 N2 - In diesem Talk blicken Prof. Dr. Wolfgang Mauerer und Ralf Ramsauer unter die Haube des verteilten Versionskontrollsystems Git. Neben einer genauen Beschreibung der Strukturen und Plumbing APIs, mit denen Git intern Commits erzeugt und verknüpft, gehen die Vortragenden auch auf nützliche Features und Standards ein, welche die Kollaborition in großen Open-Source Projekten erleichtern. Y1 - 2019 UR - https://www.youtube.com/watch?v=CrUwmO4tvLI ER - TY - CHAP A1 - Mauerer, Wolfgang T1 - Are any big brothers watching you, and if yes, what can they tell about Debian T2 - DebConf18 Hsinchu, Taiwan N2 - Debian, as a collection of software packages and components, is known to be one of the largest software projects in the history of mankind. Combined with a traceable history over many years, the artefacts created by Debian developers and users make it one of science’s favourite targets to quantitatively or qualitatively understand how real-world software development works (or does not), how people collaborate, and many other other related questions. Unfortunately, while scientists make ample use of the resources and artefacts created by FLOSS and friends, the exchange of insights and ideas does not seem to extend in both directions: Developers, users and integrators are often unaware of results obtained in science. This talk will introduce the Debian community to a selection the most important results obtained by scientific (software engineering) research, with a special focus on large-scale socio-technical analysis of projects like Debian, and the possible implications and improvements these may bring to Debian development itself. Y1 - 2018 UR - https://meetings-archive.debian.net/pub/debian-meetings/2018/DebConf18/2018-08-03/are-any-big-brothers-watching-you-and-if.webm ER - TY - GEN A1 - Mauerer, Wolfgang T1 - Embedded Linux Quality Assurance: How to Not Lie with Statistics T2 - Embedded Linux Conference North America ; OpenIoTSummit North America N2 - Embedded Linux drives an every-increasing number of appliances in many domains and applications, some even real-time and/or safety critical. Traditional quality assurance of such systems is based on testing and formal verification, but the huge amount of code and the rapid dynamics of the Linux ecosystem, as well as fundamental limitations of formal methods make these approaches unsatisfactory. Statistical quality assurance for reliability, error rates, maximal latencies etc. is needed. We will discuss current best practises, how to design and run automated statistical tests that capture relevant information, and how to properly evaluate the resulting data. Practical real-world examples and recipes are played through using the open source R language. Most importantly, we identify common mistakes in (over-)interpreting statistical results and predictions that may eventually harm people. Y1 - 2018 UR - https://www.youtube.com/watch?v=8671RYrsAj4 ER - TY - GEN A1 - Ramsauer, Ralf A1 - Kiszka, Jan A1 - Mauerer, Wolfgang T1 - Spectre and Meltdown vs. Real-Time: How Much do Mitigations Cost? T2 - Embedded Linux Conference Europe 2018, October 22 - 24, 2018, Edinburgh, UK Y1 - 2018 UR - https://www.youtube.com/watch?v=nqU4j2M_Ul4 ER - TY - GEN A1 - Ramsauer, Ralf A1 - Kiszka, Jan A1 - Mauerer, Wolfgang T1 - Building Mixed Criticality Linux Systems with the Jailhouse Hypervisor T2 - Embedded Lunux Conference + OpenIoTSummit, Portland, OR, 21.-23.02.2017 N2 - The partitioning hypervisor Jaihouse allows us to run safety critical and uncritical applications in parallel on a single SoC. We present our experiences when porting a safety and real-time critical existing application as a Jailhouse guest. It shows a novel and promising approach for implementing mixed-criticality applications with real-time requirement while not loosing the benefits of Linux. This is done by static partitioning of hardware resources; guests do not interfere. We will present a multicopter platform running the real-time critical flight stack in an isolated Jailhouse guest. This proves the practicability of Jailhouse as well as the suitability for real-time safety critical systems by porting an existing application to a Jailhouse cell. We stress its concept and show up current hardware limitations, like undesired behaviour and present possible workarounds and solutions. Y1 - 2017 UR - https://www.youtube.com/watch?v=pvs0fv-gnvw ER - TY - CHAP A1 - Murr, Florian A1 - Mauerer, Wolfgang T1 - McFSM: Globally Taming Complex Systems T2 - 2017 IEEE/ACM 3rd International Workshop on Software Engineering for Smart Cyber-Physical Systems (SEsCPS), 21-21 May 2017, Buenos Aires, Argentina N2 - Industrial computing devices, in particular cyber-physical, real-time and safety-critical systems, focus on reacting to external events and the need to cooperate with other devices to create a functional system. They are often implemented with languages that focus on a simple, local description of how a component reacts to external input data and stimuli. Despite the trend in modern software architectures to structure systems into largely independent components, the remaining interdependencies still create rich behavioural dynamics even for small systems. Standard and industrial programming approaches do usually not model or extensively describe the global properties of an entire system. Although a large number of approaches to solve this dilemma have been suggested, it remains a hard and error-prone task to implement systems with complex interdependencies correctly. We introduce multiple coupled finite state machines (McFSMs), a novel mechanism that allows us to model and manage such interdependencies. It is based on a consistent, well-structured and simple global description. A sound theoretical foundation is provided, and associated tools allow us to generate efficient low-level code in various programming languages using model-driven techniques. We also present a domain specific language to express McFSMs and their connections to other systems, to model their dynamic behaviour, and to investigate their efficiency and correctness at compile-time. Y1 - 2017 U6 - https://doi.org/10.1109/SEsCPS.2017.7 SP - 26 EP - 29 PB - IEEE ER - TY - GEN A1 - Mauerer, Wolfgang T1 - Safety, Security, Quality: Artificial Intelligence versus Common Sense T2 - Open Source Summit North America and Embedded Linux Conference North America 2020 Y1 - 2020 UR - https://www.youtube.com/watch?v=Ow_tMneQlH4 UR - https://elinux.org/images/7/7d/Wolfgang_Mauerer.pdf ER - TY - GEN A1 - Mauerer, Wolfgang A1 - Wagner, Daniel T1 - Cyclic Tests Unleashed: Large-Scale RT Analysis with Jitterdebugger T2 - Open Source Summit Japan (Tokio) and OSSNA 17.07.2019 Y1 - 2019 UR - https://events19.linuxfoundation.org/wp-content/uploads/2018/07/talk.pdf ER - TY - GEN A1 - Ramsauer, Ralf A1 - Duda, Sebastian A1 - Bulwahn, Lukas A1 - Mauerer, Wolfgang T1 - The list is our process! An analysis of the kernel’s email-based development process T2 - Embedded Linux Conference Europe, Lyon 28.10.2019 Y1 - 2019 UR - https://elinux.org/images/0/09/Pasta-elce19.pdf ER - TY - GEN A1 - Ramsauer, Ralf A1 - Kiszka, Jan A1 - Lohmann, Daniel A1 - Mauerer, Wolfgang T1 - Implementierung gemischt kritischer Systeme durch statische Hardwarepartitionierung T2 - Frühjahrstreffen der Fachgruppen Betriebssysteme, Hannover, 2. März 2018 Y1 - 2018 UR - https://www.betriebssysteme.org/wp-content/uploads/2018/04/fgbs18-169.pdf ER - TY - GEN A1 - Ramsauer, Ralf A1 - Lohmann, Daniel A1 - Mauerer, Wolfgang T1 - Quantifying Upstream Integration with PaStA T2 - LTSI Workshop @ ELC17 Y1 - 2017 ER - TY - GEN A1 - Mauerer, Wolfgang T1 - Socio-Technical Aspects of Long Term Embedded Systems Maintenance T2 - Embedded Linux Conference, April 4-6, 2016, San Diego Y1 - 2016 ER - TY - GEN A1 - Mauerer, Wolfgang T1 - Approaches to Ultra Long-Term System Maintenance T2 - Embedded Linux Conference Europe (Berlin), 2016 Y1 - 2016 UR - https://www.youtube.com/watch?v=SAbrQqSC61M ER - TY - CHAP A1 - Mauerer, Wolfgang T1 - A Virtual Computing Platform for the Internet of Things T2 - Embedded Linux Conference (San Diego), 2016 Y1 - 2016 ER - TY - GEN A1 - Mauerer, Wolfgang T1 - OSS Community, Health and Ecosystem Research: Theory and, or Theory versus Practice? T2 - 2nd International Workshop on Software Health (SoHEAL@ICSE, Montréal), 2019 Y1 - 2019 ER - TY - CHAP A1 - Lang, Jonas A1 - Schlegl, Thomas ED - Kubota, Naoyuki ED - Kiguchi, Kazuo ED - Liu, Honghai ED - Obo, Takenori T1 - Camera-Projector Calibration - Methods, Influencing Factors and Evaluation Using a Robot and Structured-Light 3D Reconstruction T2 - Intelligent Robotics and Applications N2 - As camera and projector hardware gets more and more affordable and software algorithms more sophisticated, the area of application for camera-projector configurations widens its scope. Unlike for sole camera calibration, only few comparative surveys for projector calibration methods exist. Therefore, in this paper, two readily available algorithms for the calibration of those arrays are studied and methods for the evaluation of the results are proposed. Additionally, statistical evaluations under consideration of different influencing factors like the hardware arrangement, the number of input images or the calibration target characteristics on the accuracy of the calibration results are performed. Ground truth comparison data is realized through a robotic system and structured light 3D scanning. KW - 3D scanning KW - Evaluation methods KW - Extrinsic error KW - Projector-camera calibration KW - Reconstruction error KW - Reprojection error KW - Robotic measurement KW - Structured light Y1 - 2016 SN - 978-3-319-43517-6 U6 - https://doi.org/10.1007/978-3-319-43518-3_40 VL - 9835 SP - 413 EP - 427 PB - Springer CY - Cham ER - TY - CHAP A1 - Rösel, Birgit T1 - Erfahrungen mit einem Konzept für eine Kombination aus Vorlesung, Übung und Praktikum unter Verwendung aktivierender Lehrmethoden BT - Tagungsband zum Forum der Lehre an der TH Ingolstadt, 16. April 2018 T2 - Forum der Lehre : Digitale Akzente setzen N2 - Im Beitrag wird das Konzept mit JiTT-Einheiten, klassischen Vorlesungen, Übungen und dem Praktikum vorgestellt. Insbesondere erfolgt eine Beschreibung der Struktur der Lehrtexte und der zugehörenden Fragen. Nachfolgend werden Herausforderungen bei der Umsetzung des Konzeptes dargestellt. Betrachtet wird hier die Entscheidung über Anzahl der Lehrtexte sowie die Erstellung derselben durch die Autorin sowie die Umsetzung des gesamten Konzeptes auf einer Online-Plattform. Abschließend werden die Reaktionen und Rückmeldungen der Studierenden zu dem neuen Lehrkonzept dargestellt. Basis sind hierbei die Auswertung der Beantwortung der Fragen in den JiTT-Einheiten sowie Befragungen der Studierenden mit verschiedenen Fragebögen. Y1 - 2018 SP - 33 EP - 41 ER - TY - GEN A1 - Schildgen, Johannes T1 - Sprachkurs Java BT - Das Hörbuch über objektorientierte Programmierung N2 - Java ist eine der populärsten Programmiersprachen überhaupt. Lerne in diesem Hörbuch die Sprache Java und die Konzepte der objektorientierten Programmierung kennen, egal ob bei der Autofahrt, beim Putzen oder Kochen. Wir beginnen mit den Grundlagen übers Programmieren im Allgemeinen. Ein Vorwissen in einer Programmiersprache ist zwar hilfreich, aber absolut nicht notwendig. Du lernst, was Variablen, Schleifen, Klassen und Methoden sind und wie du sie verwendest. Eines der wichtigsten Konzepte der objektorientierten Programmierung nennt sich Vererbung. Daher wirst du alles dazu lernen, was du wissen musst. Auch den Umgang mit Exceptions und mit Dateien will ich dir ans Herz legen. Du lernst zudem die verschiedenen Collection-Types, Generics und Lambda-Ausdrücke kennen. Außerdem gibt's am Ende noch einen Ausblick, der zeigt, was du mit Java alles programmieren kannst: Android-Apps, GUI-Anwendungen, Web-Apps und vieles mehr. Programmieren lernen mit einem Hörbuch ist ein innovatives Format und bietet interaktive Möglichkeiten der Lernkontrolle in Form von Quiz-Fragen, bei denen du als Hörer aktiv mitmachen kannst. Y1 - 2022 SN - 9783944787404 N1 - MP3 Audio CD PB - oomoxx media e.K. CY - Cuxhafen ET - 1. Aufl. ER - TY - CHAP A1 - Weiss, Nils A1 - Schrötter, Markus A1 - Hackenberg, Rudolf ED - Hof, Hans-Joachim ED - Fritz, Mario ED - Krauß, Christoph ED - Wasenmüller, Oliver T1 - On Threat Analysis and Risk Estimation of Automotive Ransomware T2 - ACM Computer Science in Cars Symposium : [CSCS '19) 08.10.2019, Kaiserslautern, Germany Y1 - 2019 SN - 9781450370042 U6 - https://doi.org/10.1145/3359999.3360492 SP - 1 EP - 9 PB - ACM CY - New York, NY, USA ER - TY - JOUR A1 - Borg, Leise A1 - Frikel, Jürgen A1 - Jorgensen, Jakob Sauer A1 - Quinto, Eric Todd T1 - Analyzing Reconstruction Artifacts from Arbitrary Incomplete X-ray CT Data JF - SIAM Journal on Imaging Sciences N2 - This article provides a mathematical analysis of singular (nonsmooth) artifacts added to reconstructions by filtered backprojection (FBP) type algorithms for X-ray computed tomography (CT) with arbitrary incomplete data. We prove that these singular artifacts arise from points at the boundary of the data set. Our results show that, depending on the geometry of this boundary, two types of artifacts can arise: object-dependent and object-independent artifacts. Object-dependent artifacts are generated by singularities of the object being scanned, and these artifacts can extend along lines. They generalize the streak artifacts observed in limited-angle tomography. Object-independent artifacts, on the other hand, are essentially independent of the object and take one of two forms: streaks on lines if the boundary of the data set is not smooth at a point and curved artifacts if the boundary is smooth locally. We prove that these streak and curve artifacts are the only singular artifacts that can occur for FBP in the continuous case. In addition to the geometric description of artifacts, the article provides characterizations of their strength in Sobolev scale in certain cases. The results of this article apply to the well-known incomplete data problems, including limited-angle and regionof-interest tomography, as well as to unconventional X-ray CT imaging setups that arise in new practical applications. Reconstructions from simulated and real data are analyzed to illustrate our theorems, including the reconstruction that motivated this work a synchrotron data set in which artifacts appear on lines that have no relation to the object. KW - DATA TOMOGRAPHY KW - Fourier integral operators KW - GENERALIZED RADON-TRANSFORM KW - IMAGE-RECONSTRUCTION KW - incomplete data tomography KW - limited-angle tomography KW - METAL ARTIFACTS KW - microlocal analysis KW - PROJECTIONS KW - reconstruction artifact KW - region-of-interest tomography KW - SINGULARITIES KW - wavefront set KW - X-ray tomography Y1 - 2018 U6 - https://doi.org/10.1137/18M1166833 VL - 11 IS - 4 SP - 2786 EP - 2814 PB - SIAM PUBLICATIONS ER - TY - JOUR A1 - Kuypers, Friedhelm A1 - Ucke, Christian T1 - Bierdeckelsalto JF - Physik in unserer Zeit N2 - Ein beliebtes Spiel besteht darin, einen auf einer Tischkante liegenden Bierdeckel von unten mit den ausgestreckten Fingern hochzuschnellen und dann nach einem oder mehreren Saltos zwischen Finger und Daumen wieder aufzufangen. Physikalisch gesehen, übt man einen Stoß auf den Bierdeckel aus. Die Anwendung von Impuls- und Drehimpulssatz führt zu einfachen Abschätzungen zur Mechanik des Bierdeckelsaltos. Mit Physik-Simulationsprogrammen lässt sich dieses Experiment nachvollziehen. Highspeed-Videos ergänzen Theorie und Simulation. Y1 - 2015 U6 - https://doi.org/10.1002/piuz.201401395 VL - 46 IS - 4 SP - 194 EP - 198 PB - Wiley ER - TY - JOUR A1 - Raulf, Nicole A1 - Stein, Oliver T1 - A TRACE FORMULA FOR HECKE OPERATORS ON VECTOR-VALUED MODULAR FORMS JF - GLASGOW MATHEMATICAL JOURNAL N2 - We present a ready to compute trace formula for Hecke operators on vector-valued modular forms of integral weight for SL2(Z) transforming under the Weil representation. As a corollary, we obtain a ready to compute dimension formula for the corresponding space of vector-valued cusp forms, which is more general than the dimension formulae previously published in the vector-valued setting. Y1 - 2017 U6 - https://doi.org/10.1017/S0017089516000094 VL - 59 IS - 1 SP - 143 EP - 165 PB - Cambridge University Press ER - TY - JOUR A1 - Niedersteiner, Sascha A1 - Lang, Jonas A1 - Pohlt, Clemens A1 - Schlegl, Thomas T1 - Klassifikation des Arbeitsfortschritts BT - Support-Vector-Machine-Ansatz für intelligente Arbeitsplätze JF - atp magazin N2 - Steigende Anforderungen an die Qualität von zum Teil manuell gefertigten Produkten führen dazu, dass Handarbeitsplätze mit Assistenzsystemen für die Unterstützung der am Arbeitsplatz arbeitenden Mitarbeiterinnen und Mitarbeiter ausgestattet werden. Der Beitrag beschreibt einen neuen Ansatz, um mittels Verfahren des maschinellen Lernens die Objekterkennung sowie die Transitionen eines, den Arbeitsprozess repräsentierenden Zustandsautomaten eines solchen Systems einzulernen. Hierfür werden nach einer Vorverarbeitung Daten aus einer Tiefenkamera in drei Stufen durch Support Vector Machines (SVM) klassifiziert und das Ergebnis mit dem Zustandsautomaten verknüpft. Das Konzept wird an einem industriellen Montageprozess überschaubarer Komplexität evaluiert; es zeigt gute Ergebnisse hinsichtlich der Robustheit gegenüber Fehlern bei der Objektklassifikation. KW - assistierender Arbeitsplatz KW - Maschinelles Lernen KW - Mensch-Maschine-Interaktion KW - robuste Erkennung des Arbeitsfortschritts KW - Tiefenkamera Y1 - 2017 U6 - https://doi.org/10.17560/atp.v59i11.1911 VL - 59 IS - 11 SP - 58 EP - 66 PB - Vulkan-Verlag ER - TY - JOUR A1 - Niedersteiner, Sascha A1 - Lang, Jonas A1 - Pohlt, Clemens A1 - Schlegl, Thomas T1 - Tracking work task completion - A support vector machine approach for assisting workbenches JF - atp edition N2 - Tightening quality requirements of industrial products involving manual assembly lead to the development of assisting workbenches with integrated functions to support workers performing these manual tasks. This contribution discusses a new approach to learning transitions of a finite state automaton representing the sequence of work tasks based on the video stream of a 3D depth camera. Preprocessed video data is fed into a three-stage classification scheme based on support vector machines. The results of the classification are then related to the state automation to trigger state transitions indicating the completion of a specific work task and the start of the next one. The proposed approach has been evaluated at an industrial assembly process of moderate complexity and shows very robust results with respect to disturbances caused by inaccurate object classification. N2 - Steigende Anforderungen an die Qualität von zum Teil manuell gefertigten Produkten führen dazu, dass Handarbeitsplätze mit Assistenzsystemen für die Unterstützung der am Arbeitsplatz arbeitenden Mitarbeiterinnen und Mitarbeiter ausgestattet werden. Der Beitrag beschreibt einen neuen Ansatz, um mittels Verfahren des maschinellen Lernens die Objekterkennung sowie die Transitionen eines, den Arbeitsprozess repräsentierenden Zustandsautomaten eines solchen Systems einzulernen. Hierfür werden nach einer Vorverarbeitung Daten aus einer Tiefenkamera in drei Stufen durch Support Vector Machines (SVM) klassifiziert und das Ergebnis mit dem Zustandsautomaten verknüpft. Das Konzept wird an einem industriellen Montageprozess überschaubarer Komplexität evaluiert; es zeigt gute Ergebnisse hinsichtlich der Robustheit gegenüber Fehlern bei der Objektklassifikation. T2 - Klassifikation des Arbeitsfortschritts - Support-Vector-Machine-Ansatz für intelligente Arbeitsplätze KW - 3D depth camera KW - assisting workbench KW - human-machine interaction KW - Machine learning KW - robust tracking of task completion KW - SYSTEM Y1 - 2017 U6 - https://doi.org/10.17560/atp.v59i11.1911 IS - 11 SP - 58 EP - 66 PB - DIV Deutscher Industrieverl. ER - TY - CHAP A1 - Gabor, Thomas A1 - Zielinski, Sebastian A1 - Feld, Sebastian A1 - Roch, Christoph A1 - Seidel, Christian A1 - Neukart, Florian A1 - Galter, Isabella A1 - Mauerer, Wolfgang A1 - Linnhoff-Popien, Claudia ED - Feld, Sebastian ED - Linnhoff-Popien, Claudia T1 - Assessing Solution Quality of 3SAT on a Quantum Annealing Platform T2 - Quantum Technology and Optimization Problems : First International Workshop, QTOP 2019, Munich, Germany, March 18, 2019, Proceedings Y1 - 2019 SN - 978-3-030-14081-6 U6 - https://doi.org/10.1007/978-3-030-14082-3_3 VL - 11413 SP - 23 EP - 35 PB - Springer International Publishing CY - Cham ER - TY - JOUR A1 - Sonar, Arne A1 - Weber, Karsten T1 - KI gestern und heute : Einsichten aus der Frühgeschichte der KI für aktuelle ethische Überlegungen zum Einsatz von KI in der Medizin JF - Arbeit N2 - Der Einzug Künstlicher Intelligenz (KI) in die Medizin scheint angesichts der Nutzenpotenziale unvermeidlich. Durch den Agentencharakter KI-basierter Systeme ergeben sich teils neuartige normative An- und Herausforderungen. Für den hochgradig sensiblen Anwendungsbereich der Medizin erscheint es daher notwendig, den KI-Einsatz mit ethischen Leitlinien einzuhegen. Dies wirft die Frage auf, auf welche Erfahrungsbasis eine ethische Fundierung des Einsatzes KI-basierter Technik gestellt werden könnte. Damit ist kein Schluss vom Sein auf das Sollen gemeint, sondern die Berücksichtigung bereits geführter normativer Debatten. Eine Möglichkeit, sich der normativen Landschaft der KI anzunähern, liegt in der Auseinandersetzung mit der Entwicklungsgeschichte der KI und den damit verbundenen Debatten um ethische und soziale Aspekte. Mit diesem explorativen Ansatz können relevante Problemfelder identifiziert, vorläufige Gestaltungs- und Einsatzempfehlungen für KI-Systeme in der Praxis formuliert und Vorschläge zu deren Einbettung in existierende Organisationsstrukturen generiert werden. KW - KI-Historie KW - Medizin KW - diagnostische Unterstützung KW - ethische Leitlinie Y1 - 2020 U6 - https://doi.org/10.1515/arbeit-2020-0009 VL - 29 IS - 2 SP - 105 EP - 122 ER - TY - RPRT A1 - Bresinsky, Markus A1 - Schroeder, Johanna A1 - Viscardi, Valerio T1 - Strategic Forecasting with Machine Learning for Regional Geopolitical Analysis Y1 - 2020 UR - https://www.oth-regensburg.de/fileadmin/media/presse/pressedownload/pressematerial/pdf/2020/OTH_RCAI_DinA0_KI_Bresinsky_Web.pdf ER - TY - CHAP A1 - Neubauer, Katrin A1 - Fischer, Sebastian A1 - Hackenberg, Rudolf T1 - Risk Analysis of the Cloud Infrastructure of Smart Grid and Internet of Things T2 - The Tenth International Conference on Cloud Computing, GRIDs, and Virtualization, (CLOUD COMPUTING 2019), 10th Mai 2019, Venice, Italy N2 - Cloud Computing (CC), Internet of Thing (IoT) and Smart Grid (SG) are separate technologies. The digital transformation of the energy industry and the increasing digitalization in the private sector connect these technologies. At the moment, CC is used as a service provider for IoT. Currently in Germany, the SG is under construction and a cloud connection to the infrastructure has not been implemented yet. To build the SG cloud, the new laws for privacy must be implemented and therefore it’s important to know which data can be stored and distributed over a cloud. In order to be able to use future innovative services, SG and IoT must be combined. For this, in the next step we connect the SG infrastructure with the IoT. A potential insecure device and network (IoT) should be able to transfer data to and from a critical infrastructure (SG). In detail, we focus on two different connections: the communication between the smart meter switching box and the IoT device and the data transferred between the IoT and SG cloud. In our example, a connected charging station with cloud services is connected with a SG infrastructure. To create a really smart service, the charging station needs a connection to the SG to get the current amount of renewable energy in the grid. Private data, such as name, address and payment details, should not be transferred to the IoT cloud. With these two connections, new threads emerge. In this case, availability, confidentiality and integrity must be ensured. A risk analysis over all the cloud connections, including the vulnerability and the ability of an attacker and the resulting risk are developed in this paper. KW - Smart Grid KW - Internet of Things KW - security analysis KW - cloud computing KW - safety-critical infrastructure Y1 - 2019 UR - https://www.thinkmind.org/articles/cloud_computing_2019_6_20_28013.pdf SN - 978-1-61208-703-0 SN - 2308-4294 SP - 82 EP - 87 PB - IARIA ER - TY - CHAP A1 - Neubauer, Katrin A1 - Fischer, Sebastian A1 - Hackenberg, Rudolf ED - Trinitis, Carsten ED - Pionteck, Thilo T1 - Work in Progress: Security Analysis for Safety-critical Systems BT - Smart Grid and IoT T2 - ARCS Workshop 2019; 32nd International Conference on Architecture of Computing Systems, May 2019, Copenhagen, Denmark, Workshop FORMUS³IC N2 - Internet of Thing (IoT) and Smart Grid (SG) are separate technologies. The digital transformation of the energy industry and the increasing digitalization in the private sector connect these technologies. Currently in Germany, the SG is under construction. In order to use future innovative services, SG and IoT must be combined. For this, we connect the SG Infrastructure with the IoT. A potential insecure device and network (IoT) should be able to transfer data to and from a critical infrastructure (SG). Open research question in this context are the security requirements architecture SG and IoT and the mechanism for authentication and authorisation in future application (SG and IoT). Due to the increasing networking of the systems (SG and IoT) new threats and attack vectors arise. The attacks to the architecture influence the target of authenticity, security and privacy. For the security analysis we focus on two communication points: the communication between the smart meter gateway, and the IoT device. In our example, a connected charging station with cloud services is connected with a SG infrastructure. To create a really smart service, the charging station needs a connection to the SG to get the current amount of renewable energy in the grid. With this two connections, new threats emerge. A security analysis over all the connections, including the vulnerability and the ability of an attacker, is developed in this paper. The analysis shows us challenges of the communication between IoT and SG. For this, we defined technical and organizational requirements for authentication and authorization. Current authentication and authorization mechanisms are no longer sufficient for the defined requirements. We present the Role-based trust model for Safety-critical Systems for these defined requirements. The new trust model is integrated into a role-based access control model. It defines data classes, which separate the sensitive and non-sensitive information. KW - smart grid KW - Internet of Things (IoT) KW - security analysis; KW - safety-critical infrastructure KW - trust model Y1 - 2019 SN - 978-3-8007-4957-7 SP - 101 EP - 106 PB - VDE Verlag GmbH CY - Berlin ER - TY - CHAP A1 - Pozzobon, Enrico A1 - Weiss, Nils A1 - Renner, Sebastian A1 - Hackenberg, Rudolf T1 - A Survey on Media Access Solutions for CAN Penetration Testing T2 - ACM Computer Science in Cars Symposium (CSCS), 2nd, 2018, Munich, Germany N2 - Controller Area Network (CAN) is still the most used network technology in today's connected cars. Now and in the near future, penetration tests in the area of automotive security will still require tools for CAN media access. More and more open source automotive penetration tools and frameworks are presented by researchers on various conferences, all with different properties in terms of usability, features and supported use-cases. Choosing a proper tool for security investigations in automotive network poses a challenge, since lots of different solutions are available. This paper compares currently available CAN media access solutions and gives advice on competitive hard-and software tools for automotive penetration testing. KW - CAN KW - Penetration Testing KW - Benchmarks Y1 - 2018 UR - https://cscs.mpi-inf.mpg.de/files/2018/09/05-A-Survey-on-Media-Access-Solutions-for-CAN-Penetration-Testing.pdf // 10.1145/3273946.3273949 ER - TY - GEN A1 - Weiss, Nils A1 - Pozzobon, Enrico T1 - IOT Backdoors in Cars T2 - IT Security Conference Troopers19, 2019, Heidelberg, Germany N2 - Connecting cheap IoT devices to the safety-critical network of a car can be an extremely bad idea, but at least it allows us to hack together our own automotive gadget. This talk explains the complete procedure involved in transforming a cheap OBD GSM dongle designed for fleet management into a open source automotive hacking tool. First, the hardware reverse engineering is demonstrated, showing how each component is interconnected and working together. With this knowledge, it was possible to capture the communication of the GSM module and understand the OTA protocol used by this dongle, which can be used to extract the firmware. A quick reverse engineering of the software will show that no cryptographic authentication is used for the OTA updates, and therefore a pirate GSM BTS can be used to obtain remote code execution. After that, a new open source firmware is written for the device, which can easily be extended and controlled remotely with the LUA scripting language. Examples on how hacking this dongle remotely can affect the safety of the driver will be also given. Y1 - 2019 UR - https://troopers.de/troopers19/agenda/mud7fn/ ER - TY - INPR A1 - Borg, Leise A1 - Frikel, Jürgen A1 - Jørgensen, Jakob A1 - Quinto, Eric Todd T1 - Theorems that Characterize Artifacts for Arbitrary Limited X-ray CT Data N2 - This article provides a mathematical classification of artifacts from arbitrary incom-plete X-ray tomography data when using the classical filtered backprojection algorithm. Usingmicrolocal analysis, we prove that all artifacts arise from points at the boundary of the data set.Our results show that, depending on the geometry of the data set boundary, two types of artifactscan arise: object-dependent and object-independent artifacts. The object-dependent artifacts aregenerated by singularities of the object being scanned and these artifacts can extend all along lines.This is a generalization of the streak artifacts observed in limited angle CT. The article also char-acterizes two new phenomena: the object-independent artifacts are caused only by the geometryof the data set boundary; they occur along lines if the boundary of the data set is not smooth andalong curves if the boundary of the data set is smooth. In addition to the geometric descriptionof artifacts, the article also provides characterizations of their strength in Sobolev scale in certaincases. Moreover, numerical reconstructions from simulated and real data are presented illustratingour theorems.This work is motivated by a reconstruction we present from a synchrotron data set in whichartifacts along lines appeared that were independent of the object.The results of this article apply to a wide range of well-known incomplete data problems, in-cluding limited angle CT and region of interest tomography, as well as to unconventional x-ray CTimaging setups. Some of those problems are explicitly addressed in this article, theoretically and numerically. Y1 - 2017 UR - https://www.researchgate.net/publication/318360078_Theorems_that_Characterize_Artifacts_for_Arbitrary_Limited_X-ray_CT_Data ET - version 6 ER - TY - JOUR A1 - Jost, Felix A1 - Kudruss, Manuel A1 - Koerkel, Stefan A1 - Walter, Sebastian F. T1 - A computational method for key-performance-indicator-based parameter identification of industrial manipulators JF - Journal of mathematics in Industry N2 - We present a novel derivative-based parameter identification method to improve the precision at the tool center point of an industrial manipulator. The tool center point is directly considered in the optimization as part of the problem formulation as a key performance indicator. Additionally, our proposed method takes collision avoidance as special nonlinear constraints into account and is therefore suitable for industrial use. The performed numerical experiments show that the optimum experimental designs considering key performance indicators during optimization achieve a significant improvement in comparison to other methods. An improvement in terms of precision at the tool center point of 40% to 44% was achieved in experiments with three KUKA robots and 90 notional manipulator models compared to the heuristic experimental designs chosen by an experimenter as well as 10% to 19% compared to an existing state-of-the-art method. KW - ACCURACY KW - collision avoidance KW - CONFIGURATIONS KW - industrial manipulators KW - key performance indicator KW - optimum experimental design KW - parameter identification KW - quantity of interest KW - ROBOT CALIBRATION Y1 - 2017 U6 - https://doi.org/10.1186/s13362-017-0039-7 VL - 7 IS - 9 PB - Springer Nature ER - TY - JOUR A1 - Pereira, Clayton R. A1 - Pereira, Danilo R. A1 - Silva, Francisco A. A1 - Masieiro, Joao P. A1 - Weber, Silke A. T. A1 - Hook, Christian A1 - Papa, João Paulo T1 - A new computer vision-based approach to aid the diagnosis of Parkinson's disease JF - Computer Methods and Programs in Biomedicine N2 - Background and Objective: Even today, pointing out an exam that can diagnose a patient with Parkinson's disease (PD) accurately enough is not an easy task. Although a number of techniques have been used in search for a more precise method, detecting such illness and measuring its level of severity early enough to postpone its side effects are not straightforward. In this work, after reviewing a considerable number of works, we conclude that only a few techniques address the problem of PD recognition by means of micrography using computer vision techniques. Therefore, we consider the problem of aiding automatic PD diagnosis by means of spirals and meanders filled out in forms, which are then compared with the template for feature extraction. Methods: In our work, both the template and the drawings are identified and separated automatically using image processing techniques, thus needing no user intervention. Since we have no registered images, the idea is to obtain a suitable representation of both template and drawings using the very same approach for all images in a fast and accurate approach. Results: The results have shown that we can obtain very reasonable recognition rates (around approximate to 67%), with the most accurate class being the one represented by the patients, which outnumbered the control individuals in the proposed dataset. Conclusions: The proposed approach seemed to be suitable for aiding in automatic PD diagnosis by means of computer vision and machine learning techniques. Also, meander images play an important role, leading to higher accuracies than spiral images. We also observed that the main problem in detecting PD is the patients in the early stages, who can draw near-perfect objects, which are very similar to the ones made by control patients. (C) 2016 Elsevier Ireland Ltd. All rights reserved. KW - CLASSIFICATION KW - Micrography KW - Parkinson's disease KW - Pattern recognition KW - SPEECH Y1 - 2016 U6 - https://doi.org/10.1016/j.cmpb.2016.08.005 VL - 136 SP - 79 EP - 88 PB - Elsevier ER - TY - CHAP A1 - Pereira, Clayton R. A1 - Passos, Leandro A. A1 - Lopes, Ricardo R. A1 - Weber, Silke A. T. A1 - Hook, Christian A1 - Papa, Joao Paulo T1 - Parkinson’s Disease Identification Using Restricted Boltzmann Machines T2 - Computer Analysis of Images and Patterns, 17th International Conference, CAIP 2017, Ystad, Sweden, August 22-24, 2017, Proceedings, Part II N2 - Currently, Parkinson’s Disease (PD) has no cure or accurate diagnosis, reaching approximately 60, 000 new cases yearly and worldwide, being more often in the elderly population. Its main symptoms can not be easily uncorrelated with other illness, being way more difficult to be identified at the early stages. As such, computer-aided tools have been recently used to assist in this task, but the challenge in the automatic identification of Parkinson’s Disease still persists. In order to cope with this problem, we propose to employ Restricted Boltzmann Machines (RBMs) to learn features in an unsupervised fashion by analyzing images from handwriting exams, which aim at assessing the writing skills of potential individuals. These are one of the main symptoms of PD-prone people, since such kind of ability ends up being severely affected. We show that RBMs can learn proper features that help supervised classifiers in the task of automatic identification of PD patients, as well as one can obtain a more compact representation of the exam for the sake of storage and computational load purposes. KW - Bevölkerung KW - Handschrift KW - maschinelles Lernen Y1 - 2017 SN - 978-3-319-64697-8 U6 - https://doi.org/10.1007/978-3-319-64698-5_7 VL - 10425 SP - 70 EP - 80 PB - Springer ER - TY - JOUR A1 - Wein, Simon A1 - Tomé, Ana Maria A1 - Goldhacker, Markus A1 - Greenlee, Mark W. A1 - Lang, Elmar Wolfgang T1 - A Constrained ICA-EMD Model for Group Level fMRI Analysis JF - Frontiers in Neuroscience N2 - Independent component analysis (ICA), being a data-driven method, has been shown to be a powerful tool for functional magnetic resonance imaging (fMRI) data analysis. One drawback of this multivariate approach is that it is not, in general, compatible with the analysis of group data. Various techniques have been proposed to overcome this limitation of ICA. In this paper, a novel ICA-based workflow for extracting resting-state networks from fMRI group studies is proposed. An empirical mode decomposition (EMD) is used, in a data-driven manner, to generate reference signals that can be incorporated into a constrained version of ICA (cICA), thereby eliminating the inherent ambiguities of ICA. The results of the proposed workflow are then compared to those obtained by a widely used group ICA approach for fMRI analysis. In this study, we demonstrate that intrinsic modes, extracted by EMD, are suitable to serve as references for cICA. This approach yields typical resting-state patterns that are consistent over subjects. By introducing these reference signals into the ICA, our processing pipeline yields comparable activity patterns across subjects in a mathematically transparent manner. Our approach provides a user-friendly tool to adjust the trade-off between a high similarity across subjects and preserving individual subject features of the independent components. Y1 - 2020 U6 - https://doi.org/10.3389/fnins.2020.00221 SN - 1662-453X SN - 1662-4548 VL - 14 SP - 1 EP - 10 PB - frontiers ER - TY - JOUR A1 - Sen, Abhijit A1 - Falter, Sandro A1 - Mayer, Nicolas T1 - Using DevOps paradigm to deploy web applications JF - Issues of Information Systems N2 - DevOps paradigm is widely used in industry to develop software faster, deploy high quality frequent releases of features by integrating and harmonizing the Development and IT Operations activities. Industries are taking strategic decisions to remove the barriers that existed between Development and Operational teams by encouraging collaborations among these teams throughout System Development Life Cycle (SDLC). These strategic decisions to implement DevOps paradigm resulted in the development and emergence of large arrays of tool chains to support, monitor, and automate activities of various SDLC stages. In this paper authors attempt to give practical insights on how the using of DevOps can speed up the management, development and deployment process of a simple web application. Widely used DevOps model consisting of eight stages is used to implement the example application. A toolchain consisting of state of arts tools is used at various DevOps stages. A detailed explanation of each tool, including details to their implementation and a short evaluation concludes the study. The results revealed that the usage of DevOps enables to accelerate the development process of web applications, as most steps during the build and testing process can be automated. Especially the outsourcing of operational overhead to an external cloud provider can lead to economic advantages, which will impact the future of software development. KW - KPIs KW - SDLC KW - DevOps KW - Continuous Monitoring KW - Continuous integration KW - Continuous Deployment KW - Continuous delivery Y1 - 2022 U6 - https://doi.org/10.48009/4_iis_2022_113 VL - 23 IS - 4 SP - 142 EP - 156 PB - IACIS ER - TY - JOUR A1 - Feld, Sebastian A1 - Roch, Christoph A1 - Gabor, Thomas A1 - Seidel, Christian A1 - Neukart, Florian A1 - Galter, Isabella A1 - Mauerer, Wolfgang A1 - Linnhoff-Popien, Claudia T1 - A Hybrid Solution Method for the Capacitated Vehicle Routing Problem Using a Quantum Annealer JF - Frontiers in ICT N2 - he Capacitated Vehicle Routing Problem (CVRP) is an NP-optimization problem (NPO) that has been of great interest for decades for both, science and industry. The CVRP is a variant of the vehicle routing problem characterized by capacity constrained vehicles. The aim is to plan tours for vehicles to supply a given number of customers as efficiently as possible. The problem is the combinatorial explosion of possible solutions, which increases superexponentially with the number of customers. Classical solutions provide good approximations to the globally optimal solution. D-Wave's quantum annealer is a machine designed to solve optimization problems. This machine uses quantum effects to speed up computation time compared to classic computers. The problem on solving the CVRP on the quantum annealer is the particular formulation of the optimization problem. For this, it has to be mapped onto a quadratic unconstrained binary optimization (QUBO) problem. Complex optimization problems such as the CVRP can be translated to smaller subproblems and thus enable a sequential solution of the partitioned problem. This work presents a quantum-classic hybrid solution method for the CVRP. It clarifies whether the implementation of such a method pays off in comparison to existing classical solution methods regarding computation time and solution quality. Several approaches to solving the CVRP are elaborated, the arising problems are discussed, and the results are evaluated in terms of solution quality and computation time. Y1 - 2019 U6 - https://doi.org/10.3389/fict.2019.00013 VL - 6 SP - 1 EP - 13 PB - Frontiers ER - TY - JOUR A1 - Pereira, Clayton R. A1 - Pereira, Danilo R. A1 - Rosa, Gustavo H. A1 - Albuquerque, Victor Hugo C. A1 - Weber, Silke A. T. A1 - Hook, Christian A1 - Papa, João Paulo T1 - Handwritten dynamics assessment through convolutional neural networks BT - An application to Parkinson’s disease identification JF - Artificial Intelligence in Medicine N2 - Background and objective Parkinson’s disease (PD) is considered a degenerative disorder that affects the motor system, which may cause tremors, micrography, and the freezing of gait. Although PD is related to the lack of dopamine, the triggering process of its development is not fully understood yet. Methods In this work, we introduce convolutional neural networks to learn features from images produced by handwritten dynamics, which capture different information during the individual’s assessment. Additionally, we make available a dataset composed of images and signal-based data to foster the research related to computer-aided PD diagnosis. Results The proposed approach was compared against raw data and texture-based descriptors, showing suitable results, mainly in the context of early stage detection, with results nearly to 95%. Conclusions The analysis of handwritten dynamics using deep learning techniques showed to be useful for automatic Parkinson’s disease identification, as well as it can outperform handcrafted features. KW - Convolutional neural networks KW - Handwritten dynamics KW - Parkinson’s disease Y1 - 2018 U6 - https://doi.org/10.1016/j.artmed.2018.04.001 VL - 37 IS - May SP - 67 EP - 77 PB - Elsevier ER - TY - JOUR A1 - Galka, Stefan A1 - Follath, Alexander A1 - Bross, Florian ED - Bauer, Wilhelm ED - Volk, Wolfram ED - Zäh, Michael T1 - Vorgehensmodell zur Erstellung Digitaler Zwillinge für Produktion und Logistik JF - Zeitschrift für wirtschaftlichen Fabrikbetrieb N2 - Der Digitale Zwilling (DZ) ist ein wichtiger Bestandteil der Industrie 4.0 und ermöglicht Anwendungen wie Predictive Maintenance, virtuelles Prototyping oder die Steuerung von Produktions- und Logistikprozessen. Herausforderungen bei der Entwicklung des Digitalen Zwillings entstehen durch fehlende Struktur und Standards. Mit diesem Beitrag soll ein Vorgehensmodell für die Erstellung eines Digitalen Zwillings im Bereich der Produktion und Logistik aufgezeigt werden. Das Vorgehensmodell hilft bei der Einordnung, für welche Anwendungsfälle ein Digitaler Zwilling entwickelt werden kann, welche Schritte bei einer Umsetzung erfolgen müssen, und gibt einen Überblick über die Voraussetzungen und Komplexität bei der Entwicklung. Das zentrale Element bildet dabei die zielgerichtete Aufbereitung und Analyse der zugrunde liegenden Daten mittels des in der Industrie etablierten Vorgehensmodell CRISP-DM. KW - Digitale Zwillinge KW - Simulation KW - Logistik KW - Produktion Y1 - 2022 U6 - https://doi.org/10.1515/zwf-2022-1127 VL - 117 IS - 11 SP - 691 EP - 696 PB - De Gruyter CY - Berlin ER -