TY - CHAP A1 - Diehl, Andreas A1 - Wolff, Lilli A1 - Fuhrmann, Thomas A1 - Niemetz, Michael A1 - Mörtlbauer, Stefanie A1 - Dirnberger, Sandra T1 - Compact Freshmen Welcome Seminar for Engineering Students T2 - Procedia - Social and Behavioral Sciences N2 - The Faculty of Electrical Engineering and Information Technology of the OTH Regensburg developed and implemented a compact freshmen seminar for the afternoon of the first day of study. The intention of this seminar is to help the freshmen during their transition between school and study without losing lecture time in the first semester. The concept was tested with one small study group at the beginning of the summer semester 2015. To rate the impact of the seminar and to find aspects for continuous improvement an evaluation method was developed and used. Due to the good student resonance during the first run, this introduction seminar was held again in the winter semester 2015/16. It is planned to integrate this seminar as a regular session for all freshmen of the faculty curriculum and monitor the long-term effects of student motivation and success. KW - Engineering Education KW - Freshmen Seminar Y1 - 2016 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-31034 N1 - Corresponding author: Thomas Fuhrmann IS - 228 SP - 45 EP - 52 PB - Elsevier ER - TY - RPRT A1 - Geiss, Florian A1 - Liedl, Lucia A1 - Thalhammer, Florian A1 - Mauderer, Johannes A1 - Meier, Maximilian A1 - Geitner, Florian A1 - Bindl, Jakob A1 - Belz, Reinhold ED - Meier, Hans ED - Niemetz, Michael ED - Fuhrmann, Thomas ED - Reindl, Andrea T1 - FMS-BERICHTE WINTERSEMESTER 2022/23 BT - Seminar zu aktuellen Themen der Elektro- und Informationstechnik N2 - Dieser Bericht entstand auf Initiative der Studierenden des Masterstudiengangs Elektro- und Informationstechnik (MEI)“, die an der Pflichtlehrveranstaltung „Forschungsmethoden und Seminar (FMS)“ im Wintersemester 2022/23 teilnahmen. Diese Lehrveranstaltung hat das Ziel, systematisch an das wissenschaftliche Arbeiten, speziell die Wissenschaftskommunikation, heranzuführen. Daher war geeignete Literatur zu einem individuellen Thema zu recherchieren, Veröffentlichungen auf ihre Relevanz hin zu beurteilen und letztendlich eine eigene Ausarbeitung basierend auf der Literaturrecherche zu erarbeiten und diese in einem Vortrag zu präsentieren. Parallel dazu erfolgte im Theorieteil die entsprechende Hinführung zu den verschiedenen Elementen der Wissenschaftskommunikation: • Bedeutung der Wissenschaftskommunikation für die Arbeit der Ingenieure in Forschung und Entwicklung • Literaturrecherche, Suchmaschinen, Sichtung und Analyse vorhandener Publikationen, Bewertung der Qualität aufgefundener Fachliteratur, Auswahl geeigneter Materialien für die eigene Arbeit • Aufbereitung und Darstellung der recherchierten technischer Inhalte in Form einer seitenanzahlbegrenzten wissenschaftlichen Ausarbeitung • Einhalten formaler Randbedingungen bzgl. Strukturierung, einschl. Bildnachweise und Zitationsstile • Peer-review-Prozess bei wertschätzender Beurteilung der Leistung anderer • Publikumsangepasstes Aufbereiten komplexer fachlicher Inhalte mit hochschulöffentlicher Präsentation der Ergebnisse • Führen mündlicher wissenschaftlicher Diskurse Nachdem die Masterstudierenden in der Regel über noch keine eigene wissenschaftliche Forschungserfahrung bzw. -inhalte verfügen, lag der wählbare Schwerpunkt der Literatursuche auf der Bearbeitung von vorgegeben aktuellen technischen oder gesellschaftspolitischen Forschungsthemen. T3 - Forschungsmethoden-Seminar - 5 KW - Elektrotechnik KW - Informationstechnik KW - Angewandte Wissenschaften KW - Literaturrecherche Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-60324 CY - Regensburg ER - TY - RPRT A1 - Emmert, Michael A1 - Glück, Sven A1 - Freilinger, Eva A1 - Brandl, Dominik A1 - Schindler, Sebastian A1 - Kaul, Nicolas A1 - Rasp, Franziska A1 - Akstaller, Monika A1 - Wetzel, Daniel A1 - Jupke, Michael A1 - Bodensteiner, Michael A1 - Hohlfeld, Philipp A1 - Böhm, Kevin A1 - Brem, Theresa A1 - Hammer, Pascal A1 - Singer, Thomas A1 - Karing, Maria A1 - Schneider, Viola A1 - Ostermeier, Tobias ED - Meier, Hans ED - Niemetz, Michael ED - Reindl, Andrea T1 - FMS-Berichte (Mai 2021) BT - Seminar zu aktuellen Themen der Elektro- und Informationstechnik N2 - Dieser Bericht entstand auf Initiative der Studierenden des 2020 neu gegründeten Masterstudiengangs „Elektro- und Informationstechnik (MEI)“, die an der Pflichtlehrveranstaltung „Forschungsmethoden und Seminar (FMS)“ im Wintersemester 2020/21 teilnahmen. Diese Lehrveranstaltung hat das Ziel, systematisch an das wissenschaftliche Arbeiten, speziell die Wissenschaftskommunikation, heranzuführen. Daher war geeignete Literatur zu einem individuellen Thema zu recherchieren, Veröffentlichungen auf ihre Relevanz hin zu beurteilen und letztendlich eine eigene Ausarbeitung basierend auf der Literaturrecherche zu erarbeiten und diese in einem Vortrag zu präsentieren. Parallel dazu erfolgte im Theorieteil die entsprechende Hinführung zu den verschiedenen Elementen der Wissenschaftskommunikation: • Bedeutung der Wissenschaftskommunikation für die Arbeit der Ingenieure in Forschung und Entwicklung • Literaturrecherche, Suchmaschinen, Sichtung und Analyse vorhandener Publikationen, Bewertung der Qualität aufgefundener Fachliteratur, Auswahl geeigneter Materialien für die eigene Arbeit • Aufbereitung und Darstellung der recherchierten technischer Inhalte in Form einer seitenanzahlbegrenzten wissenschaftlichen Ausarbeitung • Einhalten formaler Randbedingungen bzgl. Strukturierung, einschl. Bildnachweise und Zitationsstile • Peer-review-Prozess bei wertschätzender Beurteilung der Leistung anderer • Publikumsangepasstes Aufbereiten komplexer fachlicher Inhalte mit hochschulöffentlicher Präsentation der Ergebnisse • Führen mündlicher wissenschaftlicher Diskurse Nachdem die Masterstudierenden in der Regel über noch keine eigene wissenschaftliche Forschungserfahrung bzw. -inhalte verfügen, lag der wählbare Schwerpunkt der Literatursuche auf der Bearbeitung von vorgegeben aktuellen technischen oder gesellschaftspolitischen Forschungsthemen. T3 - Forschungsmethoden-Seminar - 1 Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-19155 CY - Regensburg ER - TY - CHAP A1 - Soska, Alexander A1 - Schumm, Michael A1 - Joseph, Saskia A1 - Reschke, Michael A1 - Mottok, Jürgen A1 - Niemetz, Michael A1 - Schroll-Decker, Irmgard T1 - Comparison of Frontal Lecture and Workshop Learning Arrangements in a Software Engineering Education Project T2 - 2014 IEEE Global Engineering Education Conference (EDUCON), Istanbul, Turkey N2 - The increase in complexity of software and its creation over the last decades requires an increase in the quality of the education of software engineering professionals. The number of Universities which answer this call by replacing or extending lectures with simulated software projects is constantly rising. However, the question how to best transfer new technological knowledge needed to be successful within this projects to the students remains open. Therefore this paper will present a comparison between the classical frontal lecture and a modern workshop learning arrangement used within these projects. By the use of workshops not only the knowledge transfer but also the acquisition of personal and social competences will be facilitated. Furthermore positive experiences with workshops at university level will support life-long learning. Y1 - 2014 U6 - https://doi.org/10.1109/EDUCON.2014.6826162 SP - 653 EP - 658 ER - TY - CHAP A1 - Fuhrmann, Thomas A1 - Farmbauer, Michael A1 - Niemetz, Michael T1 - Integrating GNU Radio into a Virtual Course about Communication Systems T2 - 44th International Convention on Information, Communication and Electronic Technology (MIPRO): 27.09. - 01.10.2021, Opatija, Croatia N2 - Due to the COVID-19 pandemic, the course Communication Systems was transferred from presence to a virtual lecture. No hands-on lab experiments were possible. Therefore, a GNU Radio practical part was integrated into the lecture. A tutorial was written to guide students through the first steps with GNU Radio to decrease initial problems and increase student motivation. Several examples were given regarding digital signal processing, analogue and digital modulation and demodulation. Software Defined Radio receivers were set up in the amateur radio lab of the university and connected to the internet so that students were able to get real radio data to be analyzed and demodulated with their own GNU Radio models. This enables a knowledge transfer from simulated signal processing to the analysis and demodulation of real live signals. Students showed medium to high interest in practical examples during the lectures and tried their own GNU Radio simulations. Overall, the integration of GNU Radio and Software Defined Radio receivers into this virtual lecture gave additional benefits for the students to deal with signal processing and demodulation experiments. It is planned to use GNU Radio in the future for complementary practical examples to the hands-on experiments in the lab. KW - Communication engineering education KW - Communication systems KW - Data models KW - Digital modulation KW - Digital signal processing KW - GNU Radio KW - Pandemics KW - radio communication KW - Receivers KW - Software Defined Radio Y1 - 2021 SN - 978-953-233-101-1 U6 - https://doi.org/10.23919/MIPRO52101.2021.9596700 SP - 1565 EP - 1570 PB - IEEE ER - TY - CHAP A1 - Deubzer, Michael A1 - Hobelsberger, Martin A1 - Mottok, Jürgen A1 - Schiller, Frank A1 - Dumke, Reiner A1 - Siegle, Markus A1 - Margull, Ulrich A1 - Niemetz, Michael A1 - Wirrer, Gerhard T1 - Modeling and Simulation of Embedded Real-Time Multi-Core Systems T2 - Proceedings of the 3rd Embedded Software Engineering Congress, 7. bis 9. Dezember 2010, Sindelfingen KW - Real-Time Systems KW - Multicore KW - Model-Driven Development KW - Architecture Description Language KW - Simulation Y1 - 2010 UR - https://www.unibw.de/technische-informatik/mitarbeiter/professoren/siegle/publikationen/ese2010_muco_modsim.pdf ER - TY - CHAP A1 - Hobelsberger, Martin A1 - Dumke, Reiner A1 - Mottok, Jürgen A1 - Niemetz, Michael A1 - Wirrer, Gerhard T1 - An Experience-Based Repository of Reusable Components for an Component-Based Automotive Software System T2 - Applied Software Measurement, proceedings of the joined International Conferences on Software Measurement IWSM/MetriKon/Mensura 2010, 10.-12. November 2010, Stuttgart, Germany Y1 - 2010 SP - 218 EP - 240 ER - TY - CHAP A1 - Deubzer, Michael A1 - Margull, Ulrich A1 - Mottok, Jürgen A1 - Niemetz, Michael A1 - Wirrer, Gerhard T1 - Partitionierungs-Scheduling von Automotive Restricted Tasksystemen auf Multiprozessorplattformen T2 - Proceedings of the 2nd Embedded Software Engineering Congress, 8. bis 10. Dezember 2009, Sindelfingen Y1 - 2009 SP - 536 EP - 542 ER - TY - JOUR A1 - Deubzer, Michael A1 - Mottok, Jürgen A1 - Margull, Ulrich A1 - Niemetz, Michael A1 - Wirrer, Gerhard T1 - Efficient Scheduling of Reliable Automotive Multi-core Systems with PD² by Weakening ERfair Task System Requirements JF - Automotive Safety and Security N2 - Partly Proportionate fair (Partly-Pfair) scheduling, which allows task migration at runtime and assigns each task processing time with regard to its weight, makes it possible to build highly efficient embedded multi-core systems. Due to its non-work-conserving behavior, which might leave the CPU idle even when tasks are ready to execute, tasks finish only shortly before their deadlines are reached. Benefits are lower task jitter, but additional workload, e.g. through interrupts, can lead to deadline violations. In this paper we present a work-conserving extension of Partly-Pfair scheduling, called PERfair scheduling and the algorithm P-ERfair-PD2 which applies Pfair modifications used for Partly-Pfair on the concept of ERfairness and PD2 policies. With a simulation based schedulability examination we show for multiple time base (MTB) task sets that P-ERfair- PD2 has the same performance as Partly-Pfair-PD2. Additionally, we show that P-ERfair- PD2 has a much higher robustness against perturbations, and therefore it is well suited for embedded domains, especially for the Automotive domain. Y1 - 2010 UR - https://www.researchgate.net/publication/287883010_Efficient_scheduling_of_reliable_automotive_multi-core_systems_with_pd2_by_weakening_erfair_tasksystem_requirements SP - 53 EP - 67 ER - TY - JOUR A1 - Deubzer, Michael A1 - Schiller, Frank A1 - Mottok, Jürgen A1 - Niemetz, Michael A1 - Margull, Ulrich T1 - Effizientes Multicore-Scheduling in Eingebetteten Systemen – Teil 1: Algorithmen für zuverlässige Echtzeitsysteme JF - atp - Automatisierungstechnische Praxis N2 - Eingebettete Systeme unterliegen neben den funktionalen Anforderungen besonders nicht funktionalen Qualitätsanforderungen wie Effizienz, Zuverlässigkeit und Echtzeitfähigkeit. Mit steigendem Bedarf an Rechenkapazität können bisherige Konzepte zur Leistungssteigerung von Singlecore-Systemen jedoch nicht mehr eingesetzt werden – der Umstieg auf Multicore-Systeme wird erforderlich. Im ersten Teil dieser Arbeit werden eine mögliche Prozessorarchitektur für zukünftige Automotive Multicore-Systeme und die Abstraktion der Software für diese Systeme vorgestellt. Nach einer Klassifkation von Multicore-Scheduling-Algorithmen präsentieren wir exemplarisch einen Algorithmus mit statischer Taskallokation und einen Algorithmus mit dynamischer Taskallokation. Bei beiden Algorithmen handelt es sich um eine Überführung theoretisch behandelter Algorithmen auf Automotive Systeme. Y1 - 2010 UR - https://docplayer.org/4474533-Effizienter-einsatz-von-multicore-systemen.html IS - 9 SP - 60 EP - 67 ER - TY - JOUR A1 - Deubzer, Michael A1 - Schiller, Frank A1 - Mottok, Jürgen A1 - Niemetz, Michael A1 - Margull, Ulrich T1 - Effizientes Multicore-Scheduling in Eingebetteten Systemen – Teil 2: Ein simulationsbasierter Ansatz zum Vergleich von Scheduling-Algorithmen JF - atp - Automatisierungstechnische Praxis N2 - Eingebettete Systeme unterliegen neben den funktionalen Anforderungen besonders nichtfunktionalen Qualitätsanforderungen wie Effizienz, Zuverlässigkeit und Echtzeitfähigkeit. Mit steigendem Bedarf an Rechenkapazität können bisherige Konzepte zur Leistungssteigerung von Singlecore-Systemen jedoch nicht mehr eingesetzt werden - der Umstieg auf Multicore-Systeme wird erforderlich. Im zweiten Teil dieser Arbeit wird ein simulationsbasierter Ansatz zum Vergleich von Multicore-Scheduling-Algorithmen vorgestellt, mit dem Algorithmen für Multicore-Systeme mit voller Migration und dynamischer Task-Priorität untersucht werden. Wir erweitern diesen Ansatz um ein Verfahren zur Untersuchung einer Tasksetmenge mit stochastisch beschriebenen Eigenschaften und vergleichen ihn mit den im Teil 1 beschriebenen Algorithmen BinPacking-EDF und P-ERfair-PD² für eine Gruppe von Automotive Powertrain Systemen. Y1 - 2010 VL - 52 IS - 10 ER - TY - CHAP A1 - Deubzer, Michael A1 - Margull, Ulrich A1 - Mottok, Jürgen A1 - Niemetz, Michael A1 - Wirrer, Gerhard T1 - Partly Proportionate Fair Multiprocessor Scheduling of Heterogeneous Task Systems T2 - 5th Embedded Real Time Software and Systems Conference, May 2010 N2 - Proportionate fair (Pfair) scheduling, which allows task migration at runtime and assigns each task processing time with regard to its weight, is one of the most efficient group of SMP multiprocessor scheduling algorithms known up to now. Drawbacks are tight requirements to the task system, namely the restriction to periodic task systems with synchronized task activation, quantized task execution time, and implicit task deadline. Most likely, a typical embedded real-time system does not fulfill these requirements. In this paper we address violations of these requirements. For heterogeneous task systems, we define the multiple time base (MTB) task system, which is a less pessimistic model than sporadic task systems and is used for automotive systems. We apply the concept of Pfair scheduling to MTB task systems, called partly proportionate fair (Partly-Pfair) scheduling. The restrictions on MTB task systems required for Partly-Pfair ness are weaker than restrictions on periodic task systems required for Pfair ness. In a simulation based study we examined the performance of Partly-Pfair-PD and found it capable to schedule feasible MTB task sets causing a load of up to 100% of the system capacity. Y1 - 2010 ER - TY - CHAP A1 - Altmann, Andreas A1 - Birkner, Wolfgang A1 - Häckl, Franz-Xaver A1 - Hanner, Christopher A1 - Liebhart, Peter A1 - Metschl, Samuel A1 - Weck, Florian A1 - Farmbauer, Michael A1 - Heiß, Manfred A1 - Cuno, H.-H. A1 - Fuhrmann, Thomas A1 - Mandl, Roland A1 - Mottok, Jürgen A1 - Niemetz, Michael T1 - Payload development and launch of a stratosphere balloon mission T2 - IEEE Global Engineering Education Conference (EDUCON 2014), 3-5 April 2014, Istanbul, Turkey N2 - During a student project a stratosphere balloon was developed and launched. This project included the definition of the balloon parameters and the scientific instruments for performing atmospheric measurements, the development of all mechanical and electronic parts, the administration of the project as well as the management tasks related to the balloon launch. The main challenge for the students was the high complexity of the project due to tasks involving many different knowledge domains and the long project duration from the initial definition to the launch. Y1 - 2014 U6 - https://doi.org/10.1109/EDUCON.2014.6826065 ER - TY - CHAP A1 - Schmidhuber, Stefan A1 - Deubzer, Michael A1 - Mader, Ralph A1 - Niemetz, Michael A1 - Mottok, Jürgen T1 - Towards the Derivation of Guidelines for the Deployment of Real-Time Tasks on a Multicore Processor T2 - 4th International Symposium on Model-Based Safety and Assessment (IMBSA 2014), Munich, Germany, October 27-29, 2014, Proceedings N2 - The deployment of automotive software on a multicore processor includes the task of mapping executables to cores. Given the number of possible solutions, integrators have to solve a complex problem. Considering multiple, often conflicting goals like minimizing task response times and memory consumption, complexity further increased with the advent of multicore processors. We present a model-based approach for deriving design rules supporting integrators with statically mapping tasks to a multicore ECU. First, an evolutionary algorithm is used to sample the design space. For each sample, a model-based analysis is performed, resulting in the required fitness values according to the system metric objectives. Finally, subsets of the sample population are used to derive deployment guidelines by evaluating similarities between highly ranked solutions. This reduces the number of solutions to be considered by the integrators by orders of magnitude. In a case-study, we demonstrate the developed approach on an artificial automotive engine management system. KW - Real-time systems KW - embedded multicore systems KW - runnable partitioning KW - task-to-core mapping KW - software integration KW - design space exploration KW - evolutionary algorithm Y1 - 2014 SN - 978-3-319-12213-7 U6 - https://doi.org/10.1007/978-3-319-12214-4_12 SP - 152 EP - 165 PB - Springer CY - Munich ER - TY - CHAP A1 - Alfranseder, Martin A1 - Krapf, Tobias A1 - Mader, Ralph A1 - Niemetz, Michael A1 - Mottok, Jürgen A1 - Siemers, Christian T1 - An Efficient Partitioning Strategy for Runnables in Weakly Dependent Tasks on Embedded Multi-Core Systems T2 - Embedded real-time software and systems (ERTS² 2014), Feb 2014, Toulouse, France N2 - With multi-core controllers entering the area of automotive control ECUs, strategies for parallelizing the control- algorithms come into focus. This paper deals with a special part of automotive powertrain software, called state transitions. Since dependencies between runnables executed there are weak, the transitions provide a good basis for parallelization. We present a strategy of how to distribute efficiently the execution of runnables to different cores while taking care of inner and outer dependencies. The strategy is accompanied by two case studies demonstrating the performance of the concept. The first one is carried out to find the most efficient strategies of parallelize state transitions based on randomly generated, simulated state transitions. In the second one, the developed partitioning strategies are applied to a real software project for an automotive powertrain system. Y1 - 2014 ER - TY - CHAP A1 - Alfranseder, Martin A1 - Mucha, Matthias A1 - Schmidhuber, Stefan A1 - Sailer, Andreas A1 - Niemetz, Michael A1 - Mottok, Jürgen T1 - A modified synchronization model for dead-lock free concurrent execution of strongly interacting task sets in embedded systems T2 - 2013 International Conference on Applied Electronics (AE 2013), IEEE, 10-12 September 2013, Pilsen, Czech Republic N2 - Global scheduling algorithms are very promising for application in embedded real-time systems using multi-core controllers. In this paper we want to make a first step forward to apply such scheduling methods on real existing systems. Especially a new resource model is necessary to avoid deadlocks, as this goal can not be achieved by using the standard OSEK Priority Ceiling Protocol when shared global resources are in use. We also introduce the new metric mean Normalized Blocking Time in order to be able to compare locking mechanisms according to the timing effects of their blocking behavior. Finally we give a simulative application example of the new metric by the use of two different kinds of semaphore models and an example task set typical for existing embedded real-time systems in the automotive powertrain environment. Y1 - 2013 VL - 18 SP - 13 EP - 18 ER - TY - CHAP A1 - Schumm, Michael A1 - Joseph, Saskia A1 - Mottok, Jürgen A1 - Niemetz, Michael A1 - Schroll-Decker, Irmgard T1 - Lernarrangements im software engineering und deren evaluation – neue konzepte für hochschule und lebenslanges Lernen T2 - Tagungsband 5th Embedded Software Engineering Kongress, 3. bis 7. Dezember 2012, Sindelfingen Y1 - 2012 ER - TY - CHAP A1 - Jupke, Michael A1 - Reindl, Andrea A1 - Meier, Hans A1 - Niemetz, Michael ED - Pinker, Jiří T1 - Bidirectional DC-DC Converter with Digital Droop Parameterization T2 - 26th 2021 International Conference on Applied Electronics (AE): 7-8 Sept. 2021 Pilsen, Czech Republic N2 - The key for decentralized battery systems is a robust and communication-less control strategy for autonomous power sharing of parallel-connected DC-DC converters. Battery systems improve the reliability and quality of power supply in renewable energy systems and enable power supply for off-grid, mobile applications, including islanded grids, home storage, and electric vehicles. In many cases, components with different electrical properties require different voltage levels. An adaptation is consequently essential and is normally implemented in DC grids for the batteries via bidirectional DC-DC converters. The power flow in both directions can thus be ensured. To achieve a power distribution in parallel connected DC-DC converters, a droop control in the form of a virtual internal resistor can be used. This paper presents a novel approach of a DC-DC converter with a digitally parameterizable droop resistor, whose voltage regulation is based on an analog operational amplifier circuit to ensure low delays and robustness. The droop resistor is adjusted with a microcontroller, which offers the possibility to apply a higher-level control for load sharing via an interface. Mathematical correlations are used to clearly define the parameters of the control. Furthermore, the circuit was completely simulated and tested in the hardware setup. The shown results verify the functionality and indicate only minor deviations. Therefore, this circuit is important for future use in distributed battery systems. KW - battery storage plants KW - DC-DC power convertors KW - power convertors KW - distributed power generation KW - microcontrollers KW - voltage regulators KW - voltage control KW - power generation control KW - power grids Y1 - 2021 SN - 978-80-261-0972-3 U6 - https://doi.org/10.23919/AE51540.2021.9542920 SP - 1 EP - 6 PB - Institute of Electrical and Electronics Engineers ER - TY - CHAP A1 - Reindl, Andrea A1 - Meier, Hans A1 - Niemetz, Michael ED - Brinkmann, André ED - Karl, Wolfgang ED - Lankes, Stefan ED - Tomforde, Sven ED - Pionteck, Thilo ED - Trinitis, Carsten T1 - Scalable, Decentralized Battery Management System Based on Self-organizing Nodes T2 - Architecture of computing systems - ARCS 2020: 33rd international conference, Aachen, Germany, May 25-28, 2020, proceedings N2 - Due to the transition to renewable energy sources and the increasing share of electric vehicles and smart grids, batteries are gaining in importance. Battery management systems (BMSs) are required for optimal, reliable operation. In this paper, existing BMS topologies are presented and evaluated in terms of reliability, scalability and flexibility. The decentralisation of BMSs and associated advantages are shown. A scalable, reconfigurable BMS based on a distributed architecture of self-organized, locally controlled nodes is proposed. For distributed system control, producers, batteries and consumers each are equipped with a local microcontroller based control unit, which monitors and controls the local parameters with its own computing and communication resources. Features, advantages and challenges to overcome of the proposed approach are described. KW - Availability Decentralized control KW - Battery management systems KW - Controller Area Network KW - distributed management KW - fault tolerant control KW - Multi-microcomputer system KW - Reconfigurable architectures KW - Renewable energy sources KW - Scalability KW - Topology Y1 - 2020 SN - 978-3-030-52793-8 U6 - https://doi.org/10.1007/978-3-030-52794-5_13 VL - 12155 SP - 171 EP - 184 PB - Springer International Publishing CY - Cham ER - TY - CHAP A1 - Herbold, Florian A1 - Reindl, Andrea A1 - Meier, Hans A1 - Niemetz, Michael A1 - Krämer, Stefan ED - Kubátová, Hana ED - Fišer, Petr ED - Borecký, Jaroslav T1 - Secure Software Updates: Challenges and Solutions for Embedded IoT Systems T2 - Proceedings of the 9th Embedded Systems Workshop: July 1-3, 2021 Horomerice, Czech Republic N2 - The invention of the internet made the development of intelligent networking of millions of embedded systems possible. This enabled smart buildings, power grids and cities as well as applications in the fields of health, agriculture and industry. These systems frequently perform safety-critical applications and operations. This makes it urgent to protect these sensible systems as effectively as possible. Especially firmware updates are often the weak point in the systems. If unauthorised persons gain access to the system during the update, malware can be injected or sensitive data can be read and stolen. This paper describes the challenges of secure firmware updates. To protect an embedded system from potential attackers, the concepts integrity, authenticity and confidentiality have to be adhered during the update process. Otherwise, there is an increased risk of modifying or reverse engineering the firmware image. Likewise, inadequately protected software can enable the installation of third-party firmware as well as the installation of firmware on a third-party system. Threat prevention is presented with solutions derived from functional safety and IT security. Aspects of protection against errors in the transmission of updates and against attacks aiming to compromise the system are explained. Finally, a possible sequence of a secure update process is examined in detail for a real embedded system implementation. For this purpose, the preparation, transmission and installation of a firmware update in the bootloader are discussed KW - Bootloader KW - Cryptograph KW - Embedded systems KW - Firmware Update KW - IoT KW - Safety, Security KW - Software Protection Y1 - 2021 UR - https://www.researchgate.net/publication/354995594_Secure_Software_Updates_Challenges_and_Solutions_for_Embedded_IoT_Systems SN - 978-80-01-06858-8 SP - 5 EP - 13 ER - TY - CHAP A1 - Schumm, Michael A1 - Joseph, Saskia A1 - Schroll-Decker, Irmgard A1 - Niemetz, Michael A1 - Mottok, Jürgen T1 - Required competences in software engineering – pair programming as an instrument for facilitating life-long learning T2 - 15th International Conference on Interactive Collaborative Learning and 41st International Conference on Engineering Pedagogy, Villach N2 - The professional requirements in software engineering have become highly volatile due to the complexities of project development and rapid and innovative changes occurring in the field. Therefore, the development of inter-personal and social competences has gained central importance in the training of software developers. The following text will present a concept allowing to acquire competences by using Pair Programming as an instrument. Moreover, arrangements for learning and teaching will be presented facilitating the acquisition of these competences. By approaching the issue of competence acquisition on a technical as well as on an educational and social level, lifelong learning is facilitated and supported. Y1 - 2012 U6 - https://doi.org/10.1109/ICL.2012.6402229 ER - TY - CHAP A1 - Abke, Jörg A1 - Brune, Philipp A1 - Haupt, Wolfram A1 - Hagel, Georg A1 - Landes, Dieter A1 - Mottok, Jürgen A1 - Niemetz, Michael A1 - Pfeiffer, Volkhard A1 - Studt, Reimer A1 - Schroll-Decker, Irmgard A1 - Sedelmaier, Yvonne T1 - Evelin – ein Forschungsprojekt zur systematischen Verbesserung des Lernens von Software Engineering T2 - Tagungsband 5th Embedded Software Engineering Kongress, 3. bis 7. Dezember 2012, Sindelfingen Y1 - 2012 SN - 978-3-8343-2407-8 SP - 653 EP - 658 ER - TY - CHAP A1 - Joseph, Saskia A1 - Schumm, Michael A1 - Schroll-Decker, Irmgard A1 - Niemetz, Michael A1 - Mottok, Jürgen T1 - Anmerkungen zur Kompetenz-Performanz-Relation: Software Engineering im Spannungsfeld der beruflichen Anforderungen T2 - Tagungsband 5th Embedded Software Engineering Kongress, 3. bis 7. Dezember 2012, Sindelfingen Y1 - 2012 ER -