TY - CHAP A1 - Osinski, Lukas A1 - Mottok, Jürgen T1 - Das FORMUS³IC Forschungsvorhaben im Verbund – Vom Stand der Technik zu neuen Entwicklungen T2 - Embedded Software Engineering Kongress (ESE 2018), 3.-7.12.2018, Sindelfingen, Tagungsband Y1 - 2018 ER - TY - CHAP A1 - Reuter, Rebecca A1 - Hauser, Florian A1 - Gold-Veerkamp, Carolin A1 - Stark, Theresa A1 - Kis, Juliane A1 - Mottok, Jürgen A1 - Abke, Jörg A1 - Meyer, Dany T1 - Towards the construction of a questionnaire for the identification of learning obstacles T2 - 2018 IEEE Global Engineering Education Conference (EDUCON 2018), 17-20 April, 2018, Santa Cruz de Tenerife, Spain N2 - This paper deals with the identification of learning ob-stacles using the questionnaire method. Therefore, two iterations were proceeded: The first one was part of a survey that was carried out at four lo-cations at universities of applied sciences. We asked students about obstructive facts in general providing items for five learning ob-stacle dimensions that were set up before; emotional/motivational, epistemological/cognitive, didactical, resource-related and meta-cognitive learning obstacle dimensions. After the general part, we asked them to answer the same question, but in relation to the – in their opinion – most difficult learning content. With this question, we aim to get indications regarding to epistemological obstacles. In a second step, we used the “Motivated Strategies for Learning Questionnaire”, which was developed by Pintrich [1] as a basis to develop a questionnaire that extracts learning obstacles. In its original version, the “Motivated Strategies for Learning Question-naire” was intended to measure students’ learning strategies, but, as the obstacle dimensions were partly derived from learning strategy classification, we chose this already validated question-naire [2]. Within this iteration, we could confirm a five-factor structure of the questionnaire that could be mapped to the five be-fore set learning obstacle dimensions. Y1 - 2018 U6 - https://doi.org/10.1109/EDUCON.2018.8363266 SP - 457 EP - 466 ER - TY - CHAP A1 - Hauser, Florian A1 - Reuter, Rebecca A1 - Gruber, Hans A1 - Mottok, Jürgen T1 - Research competence: Modification of a questionnaire to measure research competence at universities of applied sciences T2 - IEEE Global Engineering Education Conference (EDUCON), 17-20 April 2018, Santa Cruz de Tenerife, Spain N2 - This paper deals with the validation and modification of the German questionnaire "F-Komp". In its original version, it was intended to measure university students' research competences. In the beginning of this study, there were only a few tools available which were reliable. For the purposes of this study, they were not suitable. At the same time, there was no validated version of the F-Komp available, which made the whole validation process for further usage necessary. This questionnaire is based on a structure, which consist of different skills and knowledge and is focused on measuring research competence in general. The validation and modification of the F-Komp is therefore the aim of our contribution as well as a revised version of the questionnaire. We proceeded an explorative factor and a reliability analysis to do a general evaluation of the tool. Some modifications were done in the questionnaire to make it more suitable to the requirements of technical oriented universities of applied sciences [5]. Our revised version is slightly longer and contains several items to gather data about the participants demographics. The modified questionnaire is based on a more appropriate factor structure. This structure is more practically oriented and pays attention to ethical issues. In future cases, this questionnaire will be used in research oriented courses to measure students' progress in acquiring the knowledge and methods which are necessary to perform as a scientist in different research areas. KW - research oriented teaching KW - research competence KW - competence model KW - modification of a questionnaire Y1 - 2018 U6 - https://doi.org/10.1109/EDUCON.2018.8363216 SP - 109 EP - 117 ER - TY - CHAP A1 - Schmid, Michael A1 - Mottok, Jürgen ED - Schoeberl, Martin ED - Hochberger, Christian ED - Uhrig, Sascha ED - Brehm, Jürgen ED - Pionteck, Thilo T1 - Asynchronous Critical Sections in Real-Time Multiprocessor Systems T2 - Architecture of Computing Systems - ARCS 2019, 32nd International Conference, Copenhagen, Denmark, May 20-23, 2019, Proceedings N2 - Sharing data across multiple tasks in multiprocessor systems has intensively been studied in the past decades. Various synchronization protocols, the most well-known being the Priority Inheritance Protocol or the Priority Ceiling Protocol, have been established and analyzed so that blocking times of tasks waiting to access a shared resource can be upper bounded. To the best of our knowledge, all of these protocols share one commonality: Tasks that want to enter a critical section, that is already being executed by another task, immediately get blocked. In this paper, we introduce the Asynchronous Priority Ceiling Protocol (A-PCP), which makes use of aperiodic servers to execute the critical sections asynchronously, while the calling task can continue its work on non-critical section code. For this protocol, we provide a worst-case response time analysis of the asynchronous computations, as well as necessary and sufficient conditions for a feasibility analysis of a set of periodic tasks using the proposed synchronization model on a system that preemptively schedules the tasks under the rate-monotonic priority assignment. Y1 - 2019 U6 - https://doi.org/10.1007/978-3-030-18656-2_5 SP - 56 EP - 67 PB - Springer CY - Cham ER - TY - BOOK A1 - Weilkiens, Tim A1 - Huwaldt, Alexander A1 - Mottok, Jürgen A1 - Roth, Stephan A1 - Willert, Andreas T1 - Modellbasierte Softwareentwicklung für eingebettete Systeme verstehen und anwenden N2 - Die Beherrschung von Komplexität ist eine der größten Engineering-Herausforderungen des 21. Jahrhunderts. Themen wie das „Internet der Dinge“ (IoT) und „Industrie 4.0“ beschleunigen diesen Trend. Die modellgetriebene Entwicklung leistet einen entscheidenden Beitrag, um diesen Herausforderungen erfolgreich begegnen zu können. Die Autoren geben einen fundierten Einstieg und praxisorientierten Überblick über die Modellierung von Software für eingebettete Systeme von den Anforderungen über die Architektur bis zum Design, der Codegenerierung und dem Testen. Für jede Phase werden Paradigmen, Methoden, Techniken und Werkzeuge beschrieben und ihre praktische Anwendung in den Vordergrund gestellt. Darüber hinaus wird auf die Integration von Werkzeugen, funktionale Sicherheit und Metamodellierung eingegangen sowie die Einführung eines modellbasierten Ansatzes in einer Organisation und die Notwendigkeit zum lebenslangen Lernen erläutert. Der Leser erfährt in diesem Buch, wie ein modellbasiertes Vorgehen nutzbringend in der Praxis für die Softwareentwicklung eingesetzt wird. Das Vorgehen wird unabhängig von Modellierungswerkzeugen vorgestellt. Zahlreiche Beispiele – exemplarisch auch auf Basis konkreter Werkzeuge – helfen bei der praktischen Umsetzung. Y1 - 2018 SN - 978-3-86490-524-7 PB - dpunkt.Verlag CY - Heidelberg ER - TY - CHAP A1 - Renner, Sebastian A1 - Pozzobon, Enrico A1 - Mottok, Jürgen A1 - Hackenberg, Rudolf T1 - Benchmarking Software Implementations of 1st Round Candidates of the NIST LWC Project on Microcontrollers T2 - 3rd Lightweight Cryptography Workshop at NIST, Gaithersburg, USA N2 - This paper introduces a custom framework for benchmarking software implementations from the National Institute of Standards and Technology (NIST) Lightweight Cryptography (LWC) project on embedded devices. We present the design and core functions of the framework and apply it to various NIST LWC authenticated encryption with associated data (AEAD) ciphers. Altogether, we evaluate the speed of 213 submitted algorithm vari-ants on four different microcontroller units (MCUs), including 32 bit ARM and 8 bit AVR architectures. To allow a more meaningful comparison, we also conduct code size tests on all four boards and RAM utilization tests on one test platform. Y1 - 2019 UR - https://csrc.nist.gov/CSRC/media/Events/lightweight-cryptography-workshop-2019/documents/papers/benchmarking-software-implementations-lwc2019.pdf ER - TY - CHAP A1 - Hauser, Florian A1 - Gegenfurtner, Andreas A1 - Hutzler, Ivonne A1 - Reuter, Rebecca A1 - Mottok, Jürgen T1 - Eye movement patterns in source code review T2 - EARLI SIG 17 and 25 Biennial Conference 2018, Cambridge, United Kingdom N2 - This study is based on the work of Uwano, Nakamura, Monden and Matsumoto (2006) who tried to identify programmers’ eye movements in source code reviews by using eye tracking technology. The researchers were able to identify certain eye movement patterns but due to the technical limitations of earlier eye tracking systems and a small sample they could not find a valid proof for their existence. Now, twelve years later, the eye tracking technology has made significant improvements and is able to capture programmers’ reading behavior in an unobtrusive and precise way. Now the goal is to verify the described patterns by using eye tracking data from expert and novice programmers. In the experiment they have to detect errors in six different codes and take part in a retrospective interview. At the moment, data collections are ongoing. At the time of the conference, we will present the results of our analyses. Y1 - 2018 ER - TY - CHAP A1 - Hutzler, Ivonne A1 - Hauser, Florian A1 - Reuter, Rebecca A1 - Mottok, Jürgen A1 - Gruber, Hans T1 - Will the noun/verb analysis be used to generate class diagrams? An eye tracking study T2 - IATED, 11th International Conference of Education, Research and Innovation (ICERI 2018), 12-14 November 2018, Seville, Spain Y1 - 2018 U6 - https://doi.org/10.21125/iceri.2018.1103 SP - 505 EP - 514 ER - TY - CHAP A1 - Hauser, Florian A1 - Mottok, Jürgen A1 - Reuter, Rebecca A1 - Hutzler, Ivonne A1 - Gruber, Hans T1 - Eye movement patterns in software engineering – What differs the expert from the novice? T2 - IATED, 11th International Conference of Education, Research and Innovation (ICERI 2018), 12-14 November 2018, Seville, Spain Y1 - 2018 U6 - https://doi.org/10.21125/iceri.2018.1129 ER - TY - RPRT A1 - Hauser, Florian A1 - Mottok, Jürgen ED - Baier, Wolfgang T1 - Eye movement patterns im Software Engineering T2 - Forschung 2018 / Ostbayerische Technische Hochschule Regensburg Y1 - 2018 UR - https://doi.org/10.35096/othr/pub-1382 SP - 48 EP - 49 ER - TY - CHAP A1 - Osinski, Lukas A1 - Langer, Tobias A1 - Schmid, Michael A1 - Mottok, Jürgen T1 - PyFI – Fault Injection Plattform for Real Hardware T2 - 31th International Conference on Architecture of Computing Systems, ARCS Workshop 9-12 April 2018, Braunschweig, Germany N2 - Today, due to the rapidly evolving technology within the automotive industry, the automation level of cars is continuously increasing. As a consequence, the software code base implementing the automated driving functionality is growing in both, complexity and size. Simultaneously, the semiconductor industry continues with structure and voltage downscaling due to diminishing design margins and stringent power constraints. This trend leads to highly integrated hardware on the one hand, whilst provoking an increase in sensitivity against external causes for hardware faults, e.g., radiation effects or electromagnetic interference. Among the available dependability assessment techniques, fault injection (FI) is widely adopted and ISO 26262 strongly recommends applying it to validate, that functional and technical safety mechanisms are implemented correctly and effectively. We present PyFI (Python backend for Fault Injection), a fault injection backend for the Infineon Aurix TriCore which utilizes an iSystem On-chip Analyzer to inject faults into the application data or instructions that are visible at the assembly level. PyFI allows the injection of bit flips and stuck-at faults in memory and register cells of the hardware which trigger our error symptoms on application level. Furthermore, it implements fault collapsing algorithms to reduce the number of faults and the duration for single experiments by gathering statistics about the static and dynamic application execution. Y1 - 2018 UR - https://ieeexplore.ieee.org/document/8385427 SP - 1 EP - 7 ER - TY - CHAP A1 - Langer, Tobias A1 - Osinski, Lukas A1 - Schmid, Michael A1 - Mottok, Jürgen T1 - Work-in-Progress: Real-Time Scheduling of Parallel Applications with Gang Scheduling T2 - International Conference on Architecture of Computing Systems (ARCS) Workshop, 9-12 April 2018, Braunschweig, Germany N2 - Future embedded systems demand increasingly more computation performance, which can only be provided by exploiting parallelism in real-time applications. Due to scheduling and scalability issues, parallelism still is an open issue especially in hard real-time systems. In this work-in-progress paper, we describe and discuss a hierarchical gang-scheduling based approach to address the scalability issue. We use gang scheduling to schedule tasks consisting of multiple kernel level threads. The execution budget provided by the kernel level threads is used for scheduling of user level threads using a lightweight threading library running in user space. Further, the first steps towards an implementation in the realtime operating system kernel Erika OS are described and possible benefits and risks of this approach are shown. Y1 - 2018 ER - TY - CHAP A1 - Bartel, Alexander A1 - Soska, Alexander A1 - Wolff, Christian A1 - Hagel, Georg A1 - Mottok, Jürgen ED - Burghardt, M. ED - Wimmer, R. ED - Wolff, Christian ED - Womser-Hacker, C. T1 - Entwicklung eines Manifests für spielifizierte Hochschullehre T2 - Mensch und Computer 2017, Tagungsband N2 - In dieser Veröffentlichung präsentieren die Autoren erste Ergebnisse Ihrer Forschungsarbeit an einem Manifest für spielifizierte Hochschullehre. Ausgehend von einer Literaturrecherche über den aktuellen Forschungsstand werden erste Auszüge der aktuellen Arbeit dargestellt, auf deren Basis ein aktiver wissenschaftlicher Diskurs angeregt werden soll. Y1 - 2017 U6 - https://doi.org/10.18420/muc2017-mci-0277 SP - 299 EP - 304 CY - Regensburg ER - TY - CHAP A1 - Knietzsch, Marco A1 - Muckelbauer, Daniel A1 - Reuter, Rebecca A1 - Mottok, Jürgen ED - Chova, L. G. ED - Martínez, A. L. ED - Torres, I. C. T1 - Experimental Verification of Indicated Benefits Of Integrating Augmented Reality into Academic Software Engineering Classes T2 - IATED, 11th International Conference of Education, Research and Innovation (ICERI 2018), 12-14 November 2018, Seville, Spain Y1 - 2018 SN - 978-84-09-05948-5 U6 - https://doi.org/10.21125/iceri.2018.1057 SN - 2340-1095 SP - 243 EP - 252 ER - TY - CHAP A1 - Seidl, M. A1 - Krämer, Stefan A1 - Mottok, Jürgen T1 - Improving the reliability of an embedded real-time system by applying coded processing T2 - 4th Applied Research Conference, 5th July 2014, Ingolstadt Y1 - 2014 SN - 978-3-8440-2875-1 SP - 70 EP - 74 PB - Shaker CY - Aachen ER - TY - CHAP A1 - Hansch, G. A1 - Staudte, Ch. A1 - Gerhager, S. A1 - Hackenberg, Rudolf A1 - Mottok, Jürgen ED - Mottok, Jürgen ED - Ziemann, Olaf T1 - Migration path for secure and economic smart power grid devices with transitional smart metering support T2 - Applied Research Conference 2012 (ARC 2012), 25./26. June 2012 Nuremberg Y1 - 2012 SN - 2012 978-3-8440-1093-0 SP - 63 EP - 69 PB - Shaker CY - Aachen ER - TY - GEN ED - Mottok, Jürgen ED - Ziemann, Olaf T1 - 2nd Applied Research Conference 2012 (ARC 2012), 25./26. June 2012, Nuremberg Y1 - 2012 SN - 978-3-8440-1093-0 PB - Shaker Verlag CY - Aachen ER - TY - CHAP A1 - Renner, Sebastian A1 - Mottok, Jürgen ED - Trinitis, Carsten ED - Pionteck, Thilo T1 - Towards Key Management Challenges in the Smart Grid T2 - ARCS Workshop 2019 - 32nd International Conference on Architecture of Computing Systems, 20-21 May 2019, Copenhagen, Denmark N2 - The used technology in the power system is subject of great change. Through the use of smart devices, the systems in the power grid get interconnected between each other and remote networks. Especially the remote access to the critical smart grid environment involves new challenges in the area of security. To ensure the transmitted data and the access to the system is secured, cryptographic mechanisms have to be implemented. One critical part in this task is the management of cryptographic keys. This paper explains and defines a set of basic requirements for cryptographic key management in the smart grid. These requirements are derived from challenges present in common corporate environments. Then, basic approaches in the field of key management are stated and evaluated for the applicability in the power system. Different protocols for the implementation of key management strategies are shown and an assessment regarding their suitability for the defined requirements is conducted. KW - Cryptographic key management KW - smart grid security KW - post-quantum cryptography Y1 - 2019 UR - https://ieeexplore.ieee.org/document/8836205 SN - 978-3-8007-4957-7 PB - VDE-Verlag CY - Berlin ER - TY - CHAP A1 - De, Sangita A1 - Mottok, Jürgen A1 - Brada, Premek ED - Pinker, Jiří T1 - Design Approach to Platform Agnostic Service API Modeling for Interoperability of Cross-enterprise Vehicle Applications T2 - 26th 2021 International Conference on Applied Electronics (AE): 7-8 September 2021, University of West Bohemia, Pilsen, Czech Republik N2 - In the last few years, the collaboration of services between the service-oriented, cross-enterprise vehicle application frameworks has gradually increased to generate novel and more complicated vehicle services for the automotive industry. In these service collaboration scenarios, where heterogeneous application frameworks participate to realize complex vehicle services, a source of discord that emerges is that the service providers must always check, before the service deployment, whether the clients or service consumers on the other side of the communication link are compatible with a given service's API (Application Program Interface). While using standardized templates like ontologies for API's semantic specifications are crucial for a service discovery and semantic interoperability, nevertheless, accessing these service APIs' semantic data using a standardized and understandable syntactical specification template is also equally substantial to ease services interoperability. In fact, such complex service collaboration scenarios motivate this research work which proposes a design approach towards standardized, domain-specific, platform-agnostic semantic and syntactic specification of vehicle services API models. This paper also uses a typical vehicle domain case study to illustrate the design approach and a reference mapping between the platform-agnostic semantics specifications of a vehicle service API ontological model and its corresponding language-neutral, syntactic representation using the OpenAPI standard. KW - interoperability KW - Semantic Web KW - API KW - RESTful KW - ontology Y1 - 2021 SN - 978-80-261-0973-0 U6 - https://doi.org/10.23919/AE51540.2021.9542890 SP - 1 EP - 6 PB - IEEE ER - TY - CHAP A1 - De, Sangita A1 - Niklas, Michael A1 - Mottok, Jürgen A1 - Brada, Přemek T1 - A Semantic Analysis of Interface Description Models of Heterogeneous Vehicle Application Frameworks: An Approach Towards Synergy Exploration T2 - MODELSWARD 2019: Proceedings of the 7th International Conference on Model-Driven Engineering and Software Development, 20.02.2019 - 22.02.2019, Prague, Czech Republic N2 - As the world is getting more connected, the demands of services in automotive industry are increasing with the requirements such as IoT (Internet of Things) in cars, automated driving, etc. Eventually, the automotive industry has evolved to a complex network of servi ces, where each organization depends on the other organizations, to satisfy its service requirements in different phases of the vehicle life cycle. Because of these heterogeneous and complex development environments, most of the vehicle component interface models need to be specified in various manifest ations to satisfy the semantic and syntactic requirements, specific to different application development environments or frameworks. This paperdescribes an approach to semantic analysis of components interfaces description models of heterogeneous frameworks, that are used for vehicle applications. The proposed approach intends to ensure that interface description models of different service-based vehicle frameworks can be compared, correlated and re-used based on semantic synergies, across different vehicle platforms, development environments and organizations. The approach to semantic synergy exploration could further provide the knowledge base for the increase in interoperability, overall efficiency and development of an automotive domain specific general software solutions, by facilitating coexistence of components of heterogeneous frameworks in the same high-performance ECU for future vehicle software. KW - Application: Framework KW - IDL KW - Semantic: Mapping Y1 - 2019 SN - 978-989-758-358-2 SP - 394 EP - 401 PB - SCITEPRESS ER -