@article{BraunGeyerMottok, author = {Braun, J{\"u}rgen and Geyer, Dirk and Mottok, J{\"u}rgen}, title = {Alternative measure for safety related software}, series = {ATZelektronik}, journal = {ATZelektronik}, number = {04}, issn = {1862-1791}, pages = {40 -- 43}, abstract = {Wie kann die funktionale Sicherheit in Fahrzeugen zukunftssicher und effektiv gew{\"a}hrleistet werden? Und wie kann dies speziell in elektrifizierten Antrieben gelingen? Mit dieser Aufgabenstellung haben sich AVL in Kooperation mit dem LaS³ und der Universit{\"a}t der Bundeswehr M{\"u}nchen in einem Forschungsprojekt besch{\"a}ftigt. Die Antwort lautet: Die automatischen Speichertests in Zusammenspiel mit der Programmfluss-{\"U}berwachung und redundanter Hardware k{\"o}nnen besonders effektiv durch die „Codierte Verarbeitung" ersetzt werden. Denn hier wird die Diversit{\"a}t in Software erh{\"o}ht, um die aufwendigere und kostspielige Redundanz von Hardware zu reduzieren.}, language = {en} } @inproceedings{SchmidhuberDeubzerMottok, author = {Schmidhuber, Stefan and Deubzer, Michael and Mottok, J{\"u}rgen}, title = {Genetic optimization of real-time multicore systems with respect to communication-based metrics}, series = {2nd Applied Research Conference 2012 (ARC 2012) 25./26. June 2012, Nuremberg}, booktitle = {2nd Applied Research Conference 2012 (ARC 2012) 25./26. June 2012, Nuremberg}, editor = {Mottok, J{\"u}rgen and Ziemann, Olaf}, publisher = {Shaker}, address = {Aachen}, isbn = {978-3-8440-1093-0}, pages = {21 -- 25}, language = {en} } @inproceedings{SchmittnerScharfenbergMottoketal., author = {Schmittner, Christoph and Scharfenberg, Georg and Mottok, J{\"u}rgen and Strassmeier, Stefan and Limmer, Thomas}, title = {Analysis of the functional and electrical safety of charging stations}, series = {2nd Applied Research Conference 2012 (ARC 2012), 25./26. June 2012, Nuremberg}, booktitle = {2nd Applied Research Conference 2012 (ARC 2012), 25./26. June 2012, Nuremberg}, pages = {80 -- 85}, abstract = {The number of public charging stations for electric vehicles is rising. It's estimated that in 2014 more than 1.000.000 public charging stations will be installed worldwide. Currently there is no specific standard for Functional Safety and the standard for Electrical Safety is derived from standards for similar systems. The intent of this paper is to examine the existing safety architecture of mode 3 charging stations. First the standards for the charging process and the different modes are presented. Then a standard architecture for a mode 3 charging station, based on the IEC 61841, is described. After that a risk analysis of this model is performed and the electrical and Functional Safety of the architecture are analyzed. Both analyses are based on the general safety standards VDE 0100 and IEC 61508. After that possibilities for improvements and future challenges with Mode 4 charging are discussed.}, language = {en} } @inproceedings{HacklThielMottok, author = {Hackl, Magnus and Thiel, Patrik and Mottok, J{\"u}rgen}, title = {Not Only SQL - a comparison to traditional RDBMS}, series = {4th Applied Research Conference (ARC 2014), 5th July 2014, Ingolstadt}, booktitle = {4th Applied Research Conference (ARC 2014), 5th July 2014, Ingolstadt}, publisher = {Shaker}, address = {Aachen}, isbn = {978-3-8440-2875-1}, language = {en} } @inproceedings{SchreistetterHauserReuteretal., author = {Schreistetter, Stefan and Hauser, Florian and Reuter, Rebecca and Jahn, Sabrina and Mottok, J{\"u}rgen}, title = {Using Eye Tracking Data to analyze students' tasks solving behavior in classroom contexts}, series = {12th International Conference of Education, Research and Innovation (ICERI 2019), Conference Proceedings, 2019, Seville (Spain)}, booktitle = {12th International Conference of Education, Research and Innovation (ICERI 2019), Conference Proceedings, 2019, Seville (Spain)}, isbn = {978-84-09-14755-7}, issn = {2340-1095}, doi = {10.21125/iceri.2019.1473}, pages = {6087 -- 6096}, language = {en} } @inproceedings{MuellerJahnReuteretal., author = {M{\"u}ller, L. and Jahn, Sabrina and Reuter, Rebecca and Mottok, J{\"u}rgen}, title = {A Task Design Concept For A Virtual Classroom For Requirements Engineering Education}, series = {ICERI 2018 Proceedings, Seville, Spain}, booktitle = {ICERI 2018 Proceedings, Seville, Spain}, editor = {Chova, L. G. and Mart{\´i}nez, A. L. and Torres, I. C.}, doi = {10.21125/iceri.2018.1216}, pages = {911 -- 920}, language = {en} } @inproceedings{KnietzschMuckelbauerReuteretal., author = {Knietzsch, Marco and Muckelbauer, Daniel and Reuter, Rebecca and Mottok, J{\"u}rgen}, title = {Experimental Verification of Indicated Benefits Of Integrating Augmented Reality into Academic Software Engineering Classes}, series = {IATED, 11th International Conference of Education, Research and Innovation (ICERI 2018), 12-14 November 2018, Seville, Spain}, booktitle = {IATED, 11th International Conference of Education, Research and Innovation (ICERI 2018), 12-14 November 2018, Seville, Spain}, editor = {Chova, L. G. and Mart{\´i}nez, A. L. and Torres, I. C.}, isbn = {978-84-09-05948-5}, issn = {2340-1095}, doi = {10.21125/iceri.2018.1057}, pages = {243 -- 252}, language = {en} } @inproceedings{HutzlerHauserReuteretal., author = {Hutzler, Ivonne and Hauser, Florian and Reuter, Rebecca and Mottok, J{\"u}rgen and Gruber, Hans}, title = {Will the noun/verb analysis be used to generate class diagrams? An eye tracking study}, series = {IATED, 11th International Conference of Education, Research and Innovation (ICERI 2018), 12-14 November 2018, Seville, Spain}, booktitle = {IATED, 11th International Conference of Education, Research and Innovation (ICERI 2018), 12-14 November 2018, Seville, Spain}, doi = {10.21125/iceri.2018.1103}, pages = {505 -- 514}, language = {en} } @inproceedings{JahnGoldVeerkampReuteretal., author = {Jahn, Sabrina and Gold-Veerkamp, Carolin and Reuter, Rebecca and Mottok, J{\"u}rgen and Abke, J{\"o}rg}, title = {Secure Software Engineering in academic education: students' sreconceptions of it security}, series = {12th International Conference of Education, Research and Innovation (ICERI2019), 11-13 November 2019, Seville, Spain}, booktitle = {12th International Conference of Education, Research and Innovation (ICERI2019), 11-13 November 2019, Seville, Spain}, doi = {10.21125/iceri.2019.1624}, pages = {6825 -- 6834}, language = {en} } @inproceedings{SeebauerJahnMottok, author = {Seebauer, Stefan and Jahn, Sabrina and Mottok, J{\"u}rgen}, title = {Escape Rooms for teaching IT-Security}, series = {12th International Conference of Education, Research and Innovation (ICERI2019), 11-13 November 2019, Seville, Spain}, booktitle = {12th International Conference of Education, Research and Innovation (ICERI2019), 11-13 November 2019, Seville, Spain}, doi = {10.21125/iceri.2019.1623}, pages = {6815 -- 6824}, language = {en} } @misc{OPUS4-1378, title = {2nd Applied Research Conference 2012 (ARC 2012), 25./26. June 2012, Nuremberg}, editor = {Mottok, J{\"u}rgen and Ziemann, Olaf}, publisher = {Shaker Verlag}, address = {Aachen}, isbn = {978-3-8440-1093-0}, language = {en} } @inproceedings{BockMottokKoehler, author = {Bock, T. and Mottok, J{\"u}rgen and K{\"o}hler, Thorsten}, title = {A gesture-based human-machine interface using stereoscopic depth images}, series = {2nd Applied Research Conference 2012 (ARC 2012), 25./26. June 2012, Nuremberg}, booktitle = {2nd Applied Research Conference 2012 (ARC 2012), 25./26. June 2012, Nuremberg}, editor = {Mottok, J{\"u}rgen and Ziemann, Olaf}, publisher = {Shaker}, address = {Aachen}, pages = {166 -- 169}, abstract = {Reasonable integration of gesture-based automotive HMI-functionality offers potential safety benefits by reducing driver distractions and glance times to operate tertiary in-car devices. Stereo camera systems are a well investigated choice to perform the task of generating depth data for spatial gesture recognition. This paper describes the functionality of our stereo vision software, which is intended for application in a target system based on CMOS wafer-level cameras. The retrieved point cloud data was passed to a gesture-based sample application.}, language = {en} } @inproceedings{LandesSedelmaierPfeifferetal., author = {Landes, Dieter and Sedelmaier, Yvonne and Pfeiffer, Volkhard and Mottok, J{\"u}rgen and Hagel, Georg}, title = {Learning and teaching software process models}, series = {Proceedings of the 2012 IEEE Global Engineering Education Conference (EDUCON), 17-20 April 2012, Marrakech, Morocco}, booktitle = {Proceedings of the 2012 IEEE Global Engineering Education Conference (EDUCON), 17-20 April 2012, Marrakech, Morocco}, doi = {10.1109/EDUCON.2012.6201191}, abstract = {Software process models are fairly abstract tools for organizing large, complex software development projects. Since particularly undergraduate students commonly do not have any experience in being part of such a project, their understanding of the benefits and shortcomings of particular process models is very limited. Even more, frequently they are not aware of the need to follow a particular process model since their previous one-person software assignments were too small for requiring any such model at all.}, language = {en} } @inproceedings{Mottok, author = {Mottok, J{\"u}rgen}, title = {Dependable multicore scheduling}, series = {Continental Software Conference}, booktitle = {Continental Software Conference}, language = {en} } @inproceedings{NickSchorerMottok, author = {Nick, Matthias and Schorer, Michael and Mottok, J{\"u}rgen}, title = {Feasibility Study of a Build System Performing Automated Builds Based on Model-Based Build Descriptions}, series = {2nd Applied Research Conference 2012 (ARC 2012), 25./26. June 2012, Nuremberg}, booktitle = {2nd Applied Research Conference 2012 (ARC 2012), 25./26. June 2012, Nuremberg}, editor = {Mottok, J{\"u}rgen and Ziemann, Olaf}, publisher = {Shaker}, address = {Aachen}, pages = {71 -- 75}, language = {en} } @article{OstermeierMottokKnorretal., author = {Ostermeier, Daniel and Mottok, J{\"u}rgen and Knorr, Christine and Huber, Michael}, title = {Competence Atlas for Save and Green Road Vehicles in the Electro Mobility Cluster Regensburg}, series = {Applied Research Conference 2012 (ARC 2012) 25./26. June 2012, Nuremberg}, journal = {Applied Research Conference 2012 (ARC 2012) 25./26. June 2012, Nuremberg}, editor = {Mottok, J{\"u}rgen and Ziemann, Olaf}, pages = {86 -- 92}, language = {en} } @inproceedings{SteindlMottok, author = {Steindl, Michael and Mottok, J{\"u}rgen}, title = {Deriving an integration order in a component-based embedded system using simulated annealing}, series = {Proceedings of the 13. Mitteldeutschen Nachwuchswissenschaftlerkonferenz (NWK13), April 2012, Goerlitz, Germany}, booktitle = {Proceedings of the 13. Mitteldeutschen Nachwuchswissenschaftlerkonferenz (NWK13), April 2012, Goerlitz, Germany}, isbn = {978-3-86870-436-5}, language = {en} } @inproceedings{SteindlMottok, author = {Steindl, Michael and Mottok, J{\"u}rgen}, title = {Optimizing Software Integration Testing by Considering Integration Testability and Test Complexity}, series = {10th IEEE Workshop on Intelligent Solutions in Embedded Systems, 2012, Klagenfurt, Austria}, booktitle = {10th IEEE Workshop on Intelligent Solutions in Embedded Systems, 2012, Klagenfurt, Austria}, language = {en} } @inproceedings{SteindlMottok, author = {Steindl, Michael and Mottok, J{\"u}rgen}, title = {Considering Schedule Requirements of Software Integration in Component based Embedded System}, series = {International Conference on Applied Electronics, 2012, Pilsen, Czech Republic}, booktitle = {International Conference on Applied Electronics, 2012, Pilsen, Czech Republic}, language = {en} } @inproceedings{SoskaSchrollDeckerMottok, author = {Soska, Alexander and Schroll-Decker, Irmgard and Mottok, J{\"u}rgen}, title = {Implementation of Practical Exercises in Software Engineering Education to Improve the Acquirement of Functional and Non-Functional Competences}, series = {2014 International Conference on Interactive Collaborative Learning (ICL), 3-6 Dec. 2014, Dubai, UAE}, booktitle = {2014 International Conference on Interactive Collaborative Learning (ICL), 3-6 Dec. 2014, Dubai, UAE}, doi = {10.1109/ICL.2014.7017795}, abstract = {Software Engineering is a very volatile profession that requires a variety of theoretical as well as practical skills. In addition to expertise technical knowledge, graduates have to have a variety of social, methodical and personal competences. The acquirement of these non-functional competences are getting more and more important for a successful software engineer. To fulfill these requirements, it is necessarily important to prepare future professionals already during their college course of education. This paper presents exercises for a software engineering lecture with the goal to strengthen the students' practical experiences and to support the development of their non-functional competences. The developed exercises impart technical knowledge and encourage the students to improve their self-organized and lifelong learning. Thereby they are facing practical issues in all steps of the software engineering process while working on an inter semester project.}, language = {en} } @article{RaabKraemerMottok, author = {Raab, Peter and Kr{\"a}mer, Stefan and Mottok, J{\"u}rgen}, title = {Reliability of data processing and fault compensation in unreliable arithmetic processors, Microprocessors and Microsystems}, series = {Microprocessors and Microsystems}, volume = {40}, journal = {Microprocessors and Microsystems}, number = {Februar}, publisher = {Elsevier}, doi = {10.1016/j.micpro.2015.07.014}, pages = {102 -- 112}, abstract = {In logical circuits, like arithmetic operations in a processor system, arbitrary faults become a more tremendous aspect in future. Modern manufacturing processes lead to less reliability and higher vulnerability of software execution to soft-errors. The correctness of certain results is important especially for safety-critical applications whose reliability depends on the fault-free execution of each single instruction and the dependencies between them. The more complex a software is the more unreliable the outcome is. But, there is a contrary effect. If the probability for multiple faults increases, there is also the chance that two faults compensate each other and the result is correct again. This paper presents the basic ideas for such a reliability evaluation of a software's data flow with arbitrary soft-errors and the effect of fault compensation. Further, this evaluation provides a possibility to compare different implementations of a data flow with respect to the reliability. This is shown by the comparison of two different error codes as alternatives for coded data processing.}, language = {en} } @inproceedings{KraemerMottokRacek, author = {Kr{\"a}mer, Stefan and Mottok, J{\"u}rgen and Racek, Stanislav}, title = {Proportionate fair based multicore scheduling for fault tolerant multicore real-time systems}, series = {International Conference on Electrical and Information Technologies (ICEIT), 25-27 March 2015, Marakesch, Morocco}, booktitle = {International Conference on Electrical and Information Technologies (ICEIT), 25-27 March 2015, Marakesch, Morocco}, doi = {10.1109/EITech.2015.7162952}, pages = {88 -- 93}, abstract = {In this paper we present a scheduling approach for safety critical, fault tolerant, multicore real-time embedded systems. For this kind of systems, not only the correctness of a computed result but also the strict adherence to timing requirements of computation is essential to avoid any kind of damage. To react to unpredictable, arbitrary hardware faults suitable error detection mechanisms have to be applied. The caused error itself and the detection and correction have great impact on the system's timing behavior. To still keep the real-time requirements, the used scheduling algorithm has to ensure maximum flexibility to disturbances of the timing. The group of Proportionate Fair (Pfairness) multicore scheduling algorithms has been proven to create an optimal schedule in polynomial time. The contribution of this paper is a Pfair-based algorithm that uses tight coupling between the error detection mechanisms and the scheduler of the real-time operating system to establish a loop-back connection.}, language = {en} } @inproceedings{StudtWinterfeldtMottok, author = {Studt, Reimer and Winterfeldt, G{\"o}tz and Mottok, J{\"u}rgen}, title = {Measuring software engineering competencies}, series = {2015 IEEE Global Engineering Education Conference (EDUCON), 18-20 March 2015, Tallinn, Estonia}, booktitle = {2015 IEEE Global Engineering Education Conference (EDUCON), 18-20 March 2015, Tallinn, Estonia}, doi = {10.1109/EDUCON.2015.7096081}, abstract = {Measuring competencies may serve as a feedback mechanism as well as a judgment device for a lecturer. As measuring every competency from a catalogue of competencies is not very viable, the to-be-measured competencies are grouped in competency profiles. Further, assessment practices are shown and applied to a course in a study program. A discussion of useful practices concludes this contribution.}, language = {en} } @inproceedings{BraunMottok, author = {Braun, J{\"u}rgen and Mottok, J{\"u}rgen}, title = {The Myths of Coded Processing}, series = {IEEE International Conference on High Performance Computing and Communications (HPCC-ICESS-CSS 2015), 24-26 Aug. 2015, New York, USA}, booktitle = {IEEE International Conference on High Performance Computing and Communications (HPCC-ICESS-CSS 2015), 24-26 Aug. 2015, New York, USA}, doi = {10.1109/HPCC-CSS-ICESS.2015.24}, pages = {1637 -- 1644}, abstract = {Safety of embedded systems has the highest priority because it helps contribute to customer confidence and thereby ensures growth of the new markets, like electromobility. In series production fail-safe systems as well as fault-tolerant systems are realized with redundant hardware concepts like dual core microcontrollers running in lock-step-mode to reach highest safety requirements given by standards, like ISO 26262 or IEC 61508. In contrast to the hardware redundancy approach, there are also approaches available with information-, time-and/or software-redundancy since several years. One of them is known as coded processing or AN-codes. Coded processing is capable of reducing redundancy in hardware by adding diverse redundancy in software. But the breakthrough of coded processing never took place. One reason for this seem to be the myths which are widely propagated on this subject and the hereby associated uncertainties. In this paper some myths are busted, like the usage of prime numbers as transformation factor A, the myth that greater transformation factors are better or the myth about the residual error probability defined as 1/A. Some of them have been propagated since 1989. The aim of this paper is to provide more clarity and understanding for this technique, perhaps to pave the way for further functional safety concepts based on coded processing approaches.}, language = {en} } @inproceedings{MuchaMottokDeubzer, author = {Mucha, Matthias and Mottok, J{\"u}rgen and Deubzer, Michael}, title = {Probabilistic worst case response time estimation for multi-core real-time systems}, series = {2015 4th Mediterranean Conference on Embedded Computing (MECO), 14-18 June 2015, Budva, Montenegro}, booktitle = {2015 4th Mediterranean Conference on Embedded Computing (MECO), 14-18 June 2015, Budva, Montenegro}, pages = {31 -- 36}, abstract = {Traditional methods rely on Static Timing Analysis techniques to compute the Worst Case Response Time for tasks in real-time systems. Multi-Core real-time systems are faced up with concurrent task executions, semaphore accesses, and task migrations where it may be difficult to obtain the worst case upper bound. A new three staged probabilistic estimation concept is presented. Worst Case Response Times are estimated for tasksets which consist of tasks with multiple time bases. The concept involves data generation with sample classification and sample size equalization, model fit and Worst Case Response Time estimation on the basis of extreme value distribution models. A Generalized Pareto Distribution model fit method which includes threshold detection and parameter estimation is also presented. Sample classification in combination with the new Generalized Pareto Distribution model fit method allows to estimate Worst Case Response Times with low pessimism ranges compared to estimation methods that uses the Generalized Pareto or the Gumbel max distribution without sample classification.}, language = {en} } @inproceedings{MartinSailerDeubzeretal., author = {Martin, Felix and Sailer, Andreas and Deubzer, Michael and Mottok, J{\"u}rgen}, title = {Automation of a Closed Loop Model-Based Development Process}, series = {Applied Research Conference 2015 (ARC 2015), 3rd July 2015, N{\"u}rnberg}, booktitle = {Applied Research Conference 2015 (ARC 2015), 3rd July 2015, N{\"u}rnberg}, language = {en} } @inproceedings{KnorlSoskaSchrollDeckeretal., author = {Knorl, Susanne and Soska, Alexander and Schroll-Decker, Irmgard and Mottok, J{\"u}rgen}, title = {Reconstructing students' subjective theories on self-directed learning a qualitative research approach in Software Engineering education}, series = {2015 IEEE Global Engineering Education Conference (EDUCON), 18-20 March 2015, Tallinn, Estonia}, booktitle = {2015 IEEE Global Engineering Education Conference (EDUCON), 18-20 March 2015, Tallinn, Estonia}, doi = {10.1109/EDUCON.2015.7095990}, pages = {314 -- 317}, abstract = {Considering the claim of furthering self-directed learning in higher education in general and in Software Engineering education in particular, this paper deals with a new approach on understanding and facilitating self-directed learning. This approach involves the concept of subjective theories, which are expected to influence students' self-directed learning. Therefore this paper presents the intended qualitative research design for reconstructing these subjective theories and for developing ways of integrating them in didactical situations in higher education and especially in Software Engineering education.}, language = {en} } @inproceedings{SoskaMottokWolff, author = {Soska, Alexander and Mottok, J{\"u}rgen and Wolff, Christian}, title = {Playful learning in academic software engineering education}, series = {2015 IEEE Global Engineering Education Conference (EDUCON), 18-20 March 2015, Tallinn, Estonia}, booktitle = {2015 IEEE Global Engineering Education Conference (EDUCON), 18-20 March 2015, Tallinn, Estonia}, doi = {10.1109/EDUCON.2015.7095992}, pages = {324 -- 332}, abstract = {Within this thesis, we present our suggestions why playful learning in software engineering education is useful to mediate generic competences in academic teaching. Therefor we identified competences which are addressed by playful learning and mapped them to demanded generic competences in software engineering. Due to the well compliance, we analyzed current implementations of playful learning and their design regarding the mediation of required soft skills. Based on the lack of effective implementation, we close our paper with an exemplary design for playful learning.}, language = {en} } @inproceedings{BeslmeislSchrollDeckerMottok, author = {Beslmeisl, Magdalena and Schroll-Decker, Irmgard and Mottok, J{\"u}rgen}, title = {Turning to adaption through exploration in the education of Software Engineering}, series = {Proceedings of the Exploring Teaching for Active Learning in Engineering Education (ETALEE), 11 - 12 November 2015, Copenhagen}, booktitle = {Proceedings of the Exploring Teaching for Active Learning in Engineering Education (ETALEE), 11 - 12 November 2015, Copenhagen}, language = {en} } @inproceedings{YeTaoGuozhuLiuMottoketal., author = {Ye Tao, and Guozhu Liu, and Mottok, J{\"u}rgen and Hackenberg, Rudolf and Hagel, Georg}, title = {Just-in-Time-Teaching experience in a Software Design Pattern course}, series = {2015 IEEE Global Engineering Education Conference (EDUCON), 18-20 March 2015, Tallinn, Estonia}, booktitle = {2015 IEEE Global Engineering Education Conference (EDUCON), 18-20 March 2015, Tallinn, Estonia}, pages = {915 -- 919}, language = {en} } @inproceedings{NivalaHauserMottoketal., author = {Nivala, Markus and Hauser, Florian and Mottok, J{\"u}rgen and Gruber, Hans}, title = {Developing visual expertise in software engineering: An eye tracking study}, series = {IEEE Global Engineering Education Conference (EDUCON), 10-13 April 2016, Abu Dhabi, UAE}, booktitle = {IEEE Global Engineering Education Conference (EDUCON), 10-13 April 2016, Abu Dhabi, UAE}, doi = {10.1109/EDUCON.2016.7474614}, pages = {613 -- 620}, abstract = {Program comprehension and the ability to find program errors are key skills of software engineering. The aim of this pilot study was to examine the visual processes of novice and advanced programmers in authentic tasks. Fifteen novices and eight advanced programmers were given eight short pieces of code. Their task was to either identify an error or give the output of the code. Eye movements and keyboard activity were recorded. On average, the novices spent more time reading the code than composing the response, whereas the more advanced programmers started composing the response sooner and spent more time on it. In general, the advanced programmers had shorter fixations and saccades. The results suggest that the advanced programmers are quicker to grasp the essence of the code and able to see more details in it. The advanced programmers had shorter fixations and saccade lengths during the second phase which might indicate the process of chunking.}, language = {en} } @inproceedings{BeslmeislSchrollDeckerMottok, author = {Beslmeisl, Magdalena and Schroll-Decker, Irmgard and Mottok, J{\"u}rgen}, title = {Application of a Reflective Learning Approach in Software Engineering. Circularity as a relevant characteristic of a reflective teaching and learning approach}, series = {European Conference of Software Engineering Education (ECSEE2016), 30 June and 1 July 2016 in Seeon Monastery, Germany}, booktitle = {European Conference of Software Engineering Education (ECSEE2016), 30 June and 1 July 2016 in Seeon Monastery, Germany}, publisher = {Shaker}, address = {Aachen}, pages = {19 -- 33}, abstract = {The pedagogic motivation of this contribution is to develop, to adapt and to examine a specific tertiary teaching-learning situation and its changes due to a constant reflection. Within the scope of the BMBF fostered project " EVELIN " the learning teaching-Arrangement (TLA) " The Online Learning Journal (OLJ) - a tool complementing the software engineering lecture " is realized a second time at the OTH Regensburg. This further development is examined from a pedagogic perspective. This paper deals with issues concerning the conscious modification of specific teaching actions, therefore the changes of the teachers' attitude as well as the reaction of the students regarding this teaching actions. Two important findings are: (1) The teaching staff is able to adapt their teaching-actions on given conditions because of the awareness of their own teaching-attitude. (2) Due to a reflective teaching practice, there is a great potential for goal oriented learning in the context of higher education.}, language = {en} } @inproceedings{SoskaMottokWolff, author = {Soska, Alexander and Mottok, J{\"u}rgen and Wolff, Christian}, title = {An experimental card game for software testing: Development, design and evaluation of a physical card game to deepen the knowledge of students in academic software testing education}, series = {IEEE Global Engineering Education Conference (EDUCON), 10-13 April 2016, Abu Dhabi, UAE}, booktitle = {IEEE Global Engineering Education Conference (EDUCON), 10-13 April 2016, Abu Dhabi, UAE}, doi = {10.1109/EDUCON.2016.7474609}, pages = {576 -- 584}, abstract = {Teaching software testing is a challenging task. Especially if you want to impart more in-depth and practical knowledge to the students. Therefore, most lectures still teach in a classic lecture format despite the fact that this way of instruction is in any case the optimal way of instruction for today's requirements anymore. In this paper we present our implementation of an active learning method to deepen the knowledge in academic software test education. We describe a card game for advanced learning that promotes students' collaboration and knowledge exchange in a playful and competitive manner. The design of the game is based on constructive and cooperative theories. A subsequent evaluation shows that the use of this card game for teaching software testing is a suitable method.}, language = {en} } @inproceedings{SoskaMottokWolff, author = {Soska, Alexander and Mottok, J{\"u}rgen and Wolff, Christian}, title = {A Study on Cognitive Decits in Learning to Program}, series = {European Conference of Software Engineering Education (ECSEE2016), 30 June and 1 July 2016 in Seeon Monastery, Germany}, booktitle = {European Conference of Software Engineering Education (ECSEE2016), 30 June and 1 July 2016 in Seeon Monastery, Germany}, publisher = {Shaker}, address = {Aachen}, pages = {209 -- 214}, abstract = {For many students learning to program is a crucial task. In this research, we took a glance into the current literature and identified most ocurring cognitive deficits. Thereby we identified three elements that apear most significant throughout the study. We think that these deficits are fundamental basics for learning how to program. The stu-dents' education of cognitive abilities in programming needs revision and should receive far more training. In future research we want to establish a guideline for promoting these deficits through adequate teaching and learning arrangements in pre-programming education.}, language = {en} } @inproceedings{BeslmeislReuterMottok, author = {Beslmeisl, Magdalena and Reuter, Rebecca and Mottok, J{\"u}rgen}, title = {Importance of Writing in Software Engineering Education}, series = {Interactive Collaborative Learning, ICL 2016, proceedings of the 19th ICL Conference, Volume 1}, booktitle = {Interactive Collaborative Learning, ICL 2016, proceedings of the 19th ICL Conference, Volume 1}, editor = {Auer, M. and Guralnick, D. and Uhomoibhi, J.}, doi = {10.1007/978-3-319-50337-0_29}, pages = {315 -- 321}, abstract = {In this paper we present our first steps in defining the type, scope and relevance of writing in higher education of software engineering. We aim to identify lacks of scientific research and raise a new and necessary research interest to push research in this area. First we clarify the relevance of writing in higher education in general. In a second step we highlight the relevance of writing in the domain of software engineering in particular. Soft skills to be taught to students of engineering professions and especially to software engineering students are highly discussed. We discuss the skill of writing from a theoretical view as well as reasons for the high relevance of this skill for future engineers. An obligation of teaching writing in the higher education is formulated.}, language = {en} } @inproceedings{WaegemannLangerMottoketal., author = {Waegemann, Tobias and Langer, Tobias and Mottok, J{\"u}rgen and Osinski, Lukas and Stappert, Friedhelm and Tayakoli Kolagari, Ramin}, title = {Models for Dependable Heterogenous Multi- and Many-Core System Software Design Revisited}, series = {ARCS 2016, 29th International Conference on Architecture of Computing Systems, 4-7 April 2016, Nuremberg, Germany}, booktitle = {ARCS 2016, 29th International Conference on Architecture of Computing Systems, 4-7 April 2016, Nuremberg, Germany}, abstract = {Modelling approaches have to satisfy certain criteria in order to sufficiently encompass the characteristics of dependable heterogenous multi- and many-core system architectures. This work-in-progress paper gives an overview of modern modelling approaches and their related research projects, particularly those regarding domain specific architecture description languages, as well as of the specific challenges of dependable systems and heterogenous multi- and many-core designs, i.e. scheduling techniques for real-time requirements and concerns regarding functional safety. Furthermore, an ongoing research effort in order to identify a set of criteria for evaluating the eligibility of modelling approaches for the task of adequately representing these systems and their specific characteristics is presented.}, language = {en} } @inproceedings{SailerDeubzerLuettgenetal., author = {Sailer, Andreas and Deubzer, Michael and L{\"u}ttgen, Gerald and Mottok, J{\"u}rgen}, title = {CoreTAna: A Trace Analyzer for Reverse Engineering Real-Time Software}, series = {IEEE 23rd International Conference on Software Analysis, Evolution, and Reengineering (SANER), March 14 to March 18 2016, Suita, Osaka, Japan}, booktitle = {IEEE 23rd International Conference on Software Analysis, Evolution, and Reengineering (SANER), March 14 to March 18 2016, Suita, Osaka, Japan}, doi = {10.1109/SANER.2016.36}, abstract = {With the availability of the AUTOSAR standard, model-driven methodologies are becoming established in theautomotive domain. However, the process of creating models ofexisting system components is often difficult and time consuming, especially when legacy code has to be re-used or informationabout the exact timing behavior is needed. In order to tackle thisreverse engineering problem, we present CoreTAna, a novel toolthat derives an AUTOSAR compliant model of a real-time systemfrom a dynamic analysis of its trace recordings. This paper givesan overview of CoreTAna's current features and discusses itsbenefits for reverse engineering.}, language = {en} } @inproceedings{MottokMerkFalter, author = {Mottok, J{\"u}rgen and Merk, Josef and Falter, Thomas}, title = {A multi dimensional view of the Graves value systems model on teaching and learning leading to a students-centered learning: Graves model revisited}, series = {IEEE Global Engineering Education Conference (EDUCON), 10-13 April 2016, Abu Dhabi, UAE}, booktitle = {IEEE Global Engineering Education Conference (EDUCON), 10-13 April 2016, Abu Dhabi, UAE}, doi = {10.1109/EDUCON.2016.7474600}, pages = {503 -- 512}, abstract = {A cultural change at the university eco-system is possible with diverse learning approaches in faculties. Diverse learning offers will cope with the diversity of students regarding their value systems. Currently teaching at universities is dominated by "teacher-centered teaching", also there are approaches to use different methods to accelerate and intensify the teaching and learning process. Nevertheless these approaches do often not show the desired impact with all students. This paper is offering insights how that comes using the Graves value systems model and is proposing a set of methods which fits to different value systems of students.}, language = {en} } @inproceedings{TaoLiuMottoketal., author = {Tao, Ye and Liu, Guozhu and Mottok, J{\"u}rgen and Hackenberg, Rudolf and Hagel, Georg}, title = {Ranking task activity in teaching software engineering}, series = {IEEE Global Engineering Education Conference (EDUCON), 10-13 April 2016, Abu Dhabi, UAE}, booktitle = {IEEE Global Engineering Education Conference (EDUCON), 10-13 April 2016, Abu Dhabi, UAE}, doi = {10.1109/EDUCON.2016.7474678}, pages = {1023 -- 1027}, abstract = {In this research, we investigate the possibility of applying ranking task activity in teaching and learning software engineering courses. We introduce three types of ranking tasks, conceptual-, contextual- and sequential ranking questions, which cover most core topics such as requirement analysis, architecture design and quality validation in the course. We have also done experiments on a group of students to see if ranking tasks could increase their conceptual knowledge in specific areas. Assessments were given in order to evaluate the effectiveness of this activity, showing an obvious increase in complex conceptual understanding.}, language = {en} } @inproceedings{HaasMottok, author = {Haas, Kerstin and Mottok, J{\"u}rgen}, title = {Evaluation of the Research-oriented Learning Environment in a Research Association}, series = {9th International Conference on Education and New Learning Technologies, EDULEARN2017, 3-5 July 2017, Barcelona, Spain, Proceedings}, booktitle = {9th International Conference on Education and New Learning Technologies, EDULEARN2017, 3-5 July 2017, Barcelona, Spain, Proceedings}, doi = {10.21125/edulearn.2017.0872}, language = {en} } @inproceedings{HaasMottok, author = {Haas, Kerstin and Mottok, J{\"u}rgen}, title = {Research oriented learning in a research association - Evaluated in a maturity model}, series = {Teaching and Learning in a Digital World, Proceedings of the 20th International Conference on Interactive Collaborative Learning (ICL), September 27 to 29, 2017, in Budapest, Hungary - Volume 1}, booktitle = {Teaching and Learning in a Digital World, Proceedings of the 20th International Conference on Interactive Collaborative Learning (ICL), September 27 to 29, 2017, in Budapest, Hungary - Volume 1}, doi = {10.1007/978-3-319-73210-7_81}, pages = {695 -- 701}, abstract = {Research-oriented learning provides students the opportunity to develop their research competences by experiencing research practice, this often happens in the surrounding of research associations with different universities and companies. This paper introduces a two-step approach to evaluate the research-oriented learning within a research association. First we conduct the evaluation of the research environment with the instrument of the adapted Collaboration Maturity Model (Col-MM) to see whether the collaboration network and the management is able to support the students in their learning process. Additionally, we take into account the evaluation of the students' research competence. This approach targets the assessment of the starting conditions of the students and to compare their performance level until the end of the research association project phase. These two evaluation phases provide the potential to create an ideal research environment and consequently enable the students to develop and improve their research competence.}, language = {en} } @inproceedings{SailerDeubzerLuettgenetal., author = {Sailer, Andreas and Deubzer, Michael and L{\"u}ttgen, Gerald and Mottok, J{\"u}rgen}, title = {Comparing Trace Recordings of Automotive Realtime Software}, series = {RTNS '17: Proceedings of the 25th International Conference on Real-Time Networks and Systems, Grenoble, France, IEEE}, booktitle = {RTNS '17: Proceedings of the 25th International Conference on Real-Time Networks and Systems, Grenoble, France, IEEE}, doi = {10.1145/3139258.3139265}, pages = {118 -- 127}, abstract = {The process of engineering models of existing real-time system components is often difficult and time consuming, especially when legacy code has to be re-used or information about the exact timing behaviour is needed. In order to tackle this reverse engineering problem, we have developed the tool CoreTAna. CoreTAna derives an AUTOSAR compliant model of a real-time system by conducting dynamic analysis using trace recordings. Motivated by the challenge of assessing the quality of reverse engineered models of real-time software, we present a novel mathematical measure for comparing trace recordings from embedded real-time systems regarding their temporal behaviour. We also introduce a benchmark framework based on this measure, for evaluating reverse engineering tools such as CoreTAna. This considers common system architectures and also includes randomly generated systems and three systems of industrial automotive projects. Finally, an industrial case study demonstrates other use cases of our measure, such as impact analysis.}, language = {en} } @inproceedings{HauserReissNivalaetal., author = {Hauser, Florian and Reiß, Markus and Nivala, Markus and Mottok, J{\"u}rgen and Gruber, Hans}, title = {Eye tracking applied: Visual expertise in code reviews}, series = {9th International Conference on Education and New Learning Technologies, EDULEARN17, 3-5 July, 2017, Barcelona, Spain, Proceedings}, booktitle = {9th International Conference on Education and New Learning Technologies, EDULEARN17, 3-5 July, 2017, Barcelona, Spain, Proceedings}, doi = {10.21125/edulearn.2017.1084}, pages = {379 -- 389}, language = {en} } @inproceedings{NivalaHauserJossbergeretal., author = {Nivala, Markus and Hauser, Florian and Jossberger, Helen and Reiß, Markus and Mottok, J{\"u}rgen and Gruber, Hans}, title = {Detecting errors in program flow diagrams: Comparing novices and advanced programmers}, series = {EARLI Biennial Conference 2017, 17th European Association for Research on Learning and Instruction, 29 August - 2 September, 2017 - University of Tampere, Finland}, booktitle = {EARLI Biennial Conference 2017, 17th European Association for Research on Learning and Instruction, 29 August - 2 September, 2017 - University of Tampere, Finland}, language = {en} } @inproceedings{ReuterHauserGoldVeerkampetal., author = {Reuter, Rebecca and Hauser, Florian and Gold-Veerkamp, Carolin and Mottok, J{\"u}rgen and Abke, J{\"o}rg}, title = {Towards a Definition and Identification of Learning Obstacles in Higher Software Engineering Education}, series = {EDULEARN17 Proceedings, 9th International Conference on Education and New Learning Technologies, 3-5 July, 2017, Barcelona, Spain}, booktitle = {EDULEARN17 Proceedings, 9th International Conference on Education and New Learning Technologies, 3-5 July, 2017, Barcelona, Spain}, isbn = {978-84-697-3777-4}, issn = {2340-1117}, doi = {10.21125/edulearn.2017.0943}, pages = {10259 -- 10267}, subject = {Hochschuldidaktik}, language = {en} } @inproceedings{ReuterKuhnMottok, author = {Reuter, Rebecca and Kuhn, Martina and Mottok, J{\"u}rgen}, title = {A Two-Sided Approach of Applying Software Engineering Perspectives in Higher Education}, series = {Teaching and Learning in a Digital World, ICL 2017, Proceedings of the 20th International Conference on Interactive Collaborative Learning - Volume 1}, booktitle = {Teaching and Learning in a Digital World, ICL 2017, Proceedings of the 20th International Conference on Interactive Collaborative Learning - Volume 1}, pages = {460 -- 467}, language = {en} } @inproceedings{ReuterBeslmeislMottok, author = {Reuter, Rebecca and Beslmeisl, Magdalena and Mottok, J{\"u}rgen}, title = {Work in Progress: Teaching-Obstacles in Higher Software Engineering Education}, series = {8th IEEE Global Engineering Education Conference (EDUCON 2017), Athens, Greece}, booktitle = {8th IEEE Global Engineering Education Conference (EDUCON 2017), Athens, Greece}, doi = {10.1109/EDUCON.2017.7943067}, pages = {1631 -- 1635}, abstract = {Software Engineering is very abstract and complex by nature. Teaching Software Engineering in higher education is therefore still a big challenge. Although we implemented inductive teaching and learning methods in our courses for several years, we do not have a panacea. This paper aims to identify the remaining teaching obstacles in our Software Engineering courses with regard to the concrete teaching content. We present first ideas on how to overcome these teaching obstacles by the application of Augmented and/or Virtual Reality techniques with regard to the identified obstacles.}, language = {en} } @inproceedings{LangerOsinskiMottok, author = {Langer, Tobias and Osinski, Lukas and Mottok, J{\"u}rgen}, title = {A Survey of Parallel Hard-Real Time Scheduling on Task Models and Scheduling Approaches}, series = {ARCS 2017; 30th International Conference on Architecture of Computing Systems, 3-6 April 2017, Vienna, Austria}, booktitle = {ARCS 2017; 30th International Conference on Architecture of Computing Systems, 3-6 April 2017, Vienna, Austria}, abstract = {The trend towards multi-core systems becomes increasinglyomnipresentandhasalreadyreachedhardreal-time systems. In the recent years more and more researchers tackle the problem of scheduling parallel tasks with real-time constraints. We present a discussion of these recent approaches to hard real-time scheduling tasks consisting of multiple threads. We identify categories in scheduling mechanisms and task systems and discuss their features, as well as the research already achieved in their ???elds. In the domain of task models we identi???ed the gang constrained task model, the order constrained task model and the unconstrained task model. These task models differ regardingtheamountandtypeofthreadexecutionconstraints, which can be expressed using the model. Regarding scheduling algorithms, we identi???ed transformation based and nontransformation based scheduling schemes. The former rely on off-line task transformation, whereas the latter doesn???t require any prior information about task structures. The presented classi???cations show, that applied scheduling algorithms mostly are not restricted to certain task models, but that they are applied quite independently.}, language = {en} } @inproceedings{SoskaMottokWolff, author = {Soska, Alexander and Mottok, J{\"u}rgen and Wolff, Christian}, title = {Pattern oriented card game development: SOFTTY - A card game for academic learning of software testing}, series = {IEEE Global Engineering Education Conference (EDUCON), 25-28 April 2017, Athens, Greece}, booktitle = {IEEE Global Engineering Education Conference (EDUCON), 25-28 April 2017, Athens, Greece}, doi = {10.1109/EDUCON.2017.7942996}, abstract = {One of the biggest problems of educational games is the adequate integration of learning content into the game environment. Thereby the main challenge is to create a balance between gameplay and learning objectives and the correct transfer of learning principles into the game design. A useful approach is to identify game components and their specific learning constraints and the relationship between each other. By mapping learning elements to Game Design Pattern, we elaborate fundamentals for the concrete game design, focusing on card games. A shared description and an understanding of how the game design aligns with learning content facilitates the development of high quality educational games. A short illustration of our further developed implementation summarizes our experiences and shows an exemplary realization.}, language = {en} } @inproceedings{TomerHagelMottoketal., author = {Tomer, Amir and Hagel, Georg and Mottok, J{\"u}rgen and Alt, Dorit and Barak, Miriam I. and Hadar, Irit}, title = {CAPELLA: A conceptual framework for adaptive life-long learning}, series = {IEEE Global Engineering Education Conference (EDUCON), 25-28 April 2017, Athens, Greece}, booktitle = {IEEE Global Engineering Education Conference (EDUCON), 25-28 April 2017, Athens, Greece}, doi = {10.1109/EDUCON.2017.7943041}, pages = {1463 -- 1472}, abstract = {In this paper we describe a proposed framework for Cooperative Adaptive Personalized Education for Life-long Learning and Activation (CAPELLA). CAPELLA comprises four models: A Knowledge Organization Model, a Learning Process Model, a Community Collaboration Model and a Gaming Model. The underlying pedagogical approach is based on the four pillars of learning: Learning to know, learning to do, learning to collaborate and learning to be. Based on these models and principles, CAPELLA provides a theoretical framework that may assist IT developers to develop state-of-the-art educational platforms and advanced learning applications. Using an example of a UML Diagramming Workshop we demonstrate how CAPELLA incorporates the principles of Adaptive Learning.}, language = {en} } @inproceedings{OsinskiLangerMottok, author = {Osinski, Lukas and Langer, Tobias and Mottok, J{\"u}rgen}, title = {A Survey of Fault Tolerance Approaches at Different Architecture Levels}, series = {30th International Conference on Architecture of Computing Systems, ARCS 2017, 3-6 April 2017, Vienna, Austria}, booktitle = {30th International Conference on Architecture of Computing Systems, ARCS 2017, 3-6 April 2017, Vienna, Austria}, pages = {1 -- 9}, abstract = {In the recent years the development trends for computing platforms moved to multicore systems. Associated with this trend, feature sizes decreased with each new hardware generation and consequently led to a rise of transient and permanent error frequency in memory and CPUs. In this context, researchers presented several approaches which exploit the inherent redundancy of multicore platforms to provide fault tolerance. We present a discussion of fault tolerance approaches based on redundancy at different levels of architecture regarding theirsphereofreplication,performanceaswellaserrordetection and recovery capability.}, language = {en} } @inproceedings{ReuterHauserMuckelbaueretal., author = {Reuter, Rebecca and Hauser, Florian and Muckelbauer, Daniel and Stark, Theresa and Antoni, Erika and Mottok, J{\"u}rgen and Wolff, Christian}, title = {Using augmented reality in software engineering education? First insights to a comparative study of 2D and AR UML modeling}, series = {Proceedings of the 52nd Hawaii International Conference on System Sciences (HICSS) and 31st Conference on Software Engineering Education and Training (CSEE\&T), January 8 - 11, 2019 Grand Wailea, Hawaii}, booktitle = {Proceedings of the 52nd Hawaii International Conference on System Sciences (HICSS) and 31st Conference on Software Engineering Education and Training (CSEE\&T), January 8 - 11, 2019 Grand Wailea, Hawaii}, doi = {10.24251/HICSS.2019.938}, pages = {7798 -- 7807}, abstract = {Although there has been much speculation about the potential of Augmented Reality (AR) in teaching for learning material, there is a significant lack of empirical proof about its effectiveness and implementation in higher education. We describe a software to integrate AR using the Microsoft Hololens into UML (Unified Modeling Language) teaching. Its user interface is laid out to overcome problems of existing software. We discuss the design of the tool and report a first evaluation study. The study is based upon effectiveness as a metric for students performance and components of motivation. The study was designed as control group experiment with two groups. The experimental group had to solve tasks with the help of the AR modeling tool and the control group used a classic PC software. We identified tendencies that participants of the experimental group showed more motivation than the control group. Both groups performed equally well}, language = {en} } @inproceedings{SchmidLangerOsinskietal., author = {Schmid, Michael and Langer, Tobias and Osinski, Lukas and Mottok, J{\"u}rgen}, title = {Parallel Active Object Pattern}, series = {31th International Conference on Architecture of Computing Systems, ARCS Workshop 2018,9-12 April 2018, Braunschweig, Germany}, booktitle = {31th International Conference on Architecture of Computing Systems, ARCS Workshop 2018,9-12 April 2018, Braunschweig, Germany}, isbn = {978-3-8007-4559-3}, abstract = {With parallel applications becoming more and more popular even in real-time systems, the demand for safe and easyto- use software libraries and frameworks for parallel and concurrent computations is growing immensely. These frameworks usually provide an implementation for different sets of software patterns. A very well known software pattern for concurrency is the Active Object pattern, that allows various threads to have synchronized access to an object in question. This paper presents the Parallel Active Object pattern, which extends the common Active Object pattern to support the use of objects, whose computations are profoundly enhanced by a parallel execution. Furthermore, a C++ software framework is introduced, which implements the Parallel Active Object pattern and thus provides the possibility of using task or data parallel patterns, for example Map, Reduce and Divide-and-Conquer, on the active object's calculations. The proposed framework is evaluated against two other popular libraries, namely OpenMP and Intel Threading Building Blocks. Through utilization of the C++11 standard and template classes a simple user interface is provided, which abstracts the distribution of workloads among the worker threads. By making use of the C++ Standard Template Library the framework can easily be ported to embedded systems and by extending the pattern through real-time capabilities, which ensure a timely and reliable execution of the method requests, the intention of providing the framework for time critical environments is also targeted in the future.}, language = {en} } @inproceedings{KampmannMottok, author = {Kampmann, Matthias and Mottok, J{\"u}rgen}, title = {A 'laboratory' as an approach to foster writing skills at software engineering studies learning software engineering is easier when writing courses are directly dpplied to lecture's content and the problems and examples enrolled in}, series = {2018 IEEE Global Engineering Education Conference, EDUCON 2018, Santa Cruz de Teneriffe, Spanien}, booktitle = {2018 IEEE Global Engineering Education Conference, EDUCON 2018, Santa Cruz de Teneriffe, Spanien}, doi = {10.1109/EDUCON.2018.8363326}, pages = {900 -- 908}, abstract = {Writing, with no doubt, is besides reading a core competency which allows us to "exploit" knowledge in general. It also makes possible the exploration of software engineering's core issues. Especially within this context it is necessary to master the reading of complex texts as well as to be able to write in an appropriate academic expression. With regard to studies in software engineering this seems to be obvious, but in fact the opposite is the reality. Therefore measures to improve these skills seemed to be necessarily applied. At the Ostbayerische Technische Hochschule (OTH, University of Applied Sciences, Regensburg) a new format, the so called c*lab, was installed during the winter semester 2017. This was a course which followed the principle of "Writing Across the Curriculum" (WAC). Organized parallel to a lecture of learning how to program the language C, and addressing students of the first semester, the course was a complete voluntary offer in addition to the general standard courses and lectures of the faculty. Students who participated not only reflected on C and its principles, nor only on writing as a self purpose, but they also learned to express technical thoughts and ideas by the use of didactic methods. The idea to transfer also basic LTeX concepts to write a paper based on the IEEE bare_conf.tex-template were also planned. The course followed the idea of student's-centred learning. This paper presents the main structure, goals, and means of the c*lab, and the theory behind. It also embeds the course within the horizon of experiences of teaching writing skills at the Laboratory for Safe and Secure Systems (LaS 3 ) at the faculty of electronic and information engineering at the OTH Regensburg. First experiences have shown that participants increase writing skills and their idea of the importance of writing.}, language = {en} } @inproceedings{ReuterJahnFigasetal., author = {Reuter, Rebecca and Jahn, Sabrina and Figas, Paula and Bartel, Alexander and Mottok, J{\"u}rgen and Hagel, Georg}, title = {Learning Tasks for Software Engineering Education: An exemplary development of learning tasks for software engineering based on didactic function and knowledge type}, series = {Proceedings of the 3rd European Conference of Software Engineering Education (ECSEE'18), JUne 2018, Seeon, Bavaria, Germany}, booktitle = {Proceedings of the 3rd European Conference of Software Engineering Education (ECSEE'18), JUne 2018, Seeon, Bavaria, Germany}, doi = {10.1145/3209087.3209097}, pages = {1 -- 7}, abstract = {Learning tasks play an important role in education and especially in higher education. However, there is a significant lack in research regarding these in higher education. A learning task shows several characteristics, whereas the didactic function of a task is mostly considered. Two characteristics of learning tasks are focused in this paper: The didactic function and the type knowledge. Existing types of learning tasks are presented as well as a proposal for learning tasks in software engineering education that considers didactic functions, like elaboration, training or application and types of knowledge, i.e. factual, conceptual, procedural and metacognitive knowledge. This paper aims to serve as a guidance for lecturers who have the purpose to create learning tasks that address both characteristics -- the didactic function and the type of knowledge.}, language = {en} } @inproceedings{LaloWeberSaileretal., author = {Lalo, Erjola and Weber, Raphael and Sailer, Andreas and Mottok, J{\"u}rgen and Siemers, Christian}, title = {On Solving Task Allocation and Schedule Generation for Time-Triggered LET Systems using Constraint Programming}, series = {32nd International Conference on Architecture of Computing Systems, ARCS Workshop 2019, 20-21 May 2019, Copenhagen, Denmark}, booktitle = {32nd International Conference on Architecture of Computing Systems, ARCS Workshop 2019, 20-21 May 2019, Copenhagen, Denmark}, pages = {1 -- 8}, abstract = {The amount of safety-critical embedded systems in automotive development is heavily growing. Ensuring their reliability not only increases the complexity of functions but also requires determinism at design and execution time, which is considerably challenging to fulfill and verify for multi-core processors. The Logical Execution Time (LET) is recently recognized in automotive industry as an approach for ensuring deterministic functional behavior. However, to decrease the manual design effort and time for deploying such complex systems to multi-core platforms and for ensuring their strict timing and safety requirements, automatic solutions are needed. This work presents a solution for allocating tasks to multi-core processors and generating a time-triggered schedule for embedded systems considering safety, timing, and LET semantics. The approach we propose solves both challenges by defining them as a Constraint Satisfaction Problem (CSP). To examine our CSP formulation, we use MiniZinc, which is a solver-independent constraint modeling language that can employ a variety of solvers. In a case study, we explore optimizations of an industrial system that are enabled by scheduling and task allocation design decisions. Further, the performance of the proposed solutions is evaluated based on large set of synthetically generated system models.}, language = {en} } @inproceedings{NagengastOsinskiMottok, author = {Nagengast, Christian and Osinski, Lukas and Mottok, J{\"u}rgen}, title = {Synchronization Techniques for Parallel Redundant Execution of Applications}, series = {32nd International Conference on Architecture of Computing Systems, ARCS Workshop 2019, 20-21 May 2019, Copenhagen, Denmark}, booktitle = {32nd International Conference on Architecture of Computing Systems, ARCS Workshop 2019, 20-21 May 2019, Copenhagen, Denmark}, publisher = {IEEE}, pages = {1 -- 8}, abstract = {In fault tolerant systems, applications are replicated and executed to enable error detection and recovery. If one replica application fails, another is able to take its place and provide the correct results. This concept can benefit from parallel execution on separate execution units. The rise of multicore platforms supports the development of parallel software, by providing the adequate hardware. However, this raises challenges regarding the synchronization of the redundant strings of execution. Replica determinism means that given the same input, identical programs provide the same output. To ensure replica determinism, requirements regarding the synchronization can be split in two domains: data and time. This paper examines the state of the art of synchronization techniques for parallel replicated execution in the context of fault tolerant systems. We analyze the requirements regarding synchronization within the time and data domain and compare different concepts of hardware (multicore, multiprocessor and multi-PCB) and software (processes, threads).}, language = {en} } @inproceedings{WeihererOsinskiMottok, author = {Weiherer, Kerstin and Osinski, Lukas and Mottok, J{\"u}rgen}, title = {Software-Based Triple Modular Redundancy with Fault-Tolerant Replicated Voters}, series = {32nd International Conference on Architecture of Computing Systems, ARCS Workshop 2019, 20-21 May 2019, Copenhagen, Denmark}, booktitle = {32nd International Conference on Architecture of Computing Systems, ARCS Workshop 2019, 20-21 May 2019, Copenhagen, Denmark}, pages = {1 -- 8}, abstract = {New computing-intensive applications such as assisted or highly automated driving are rapidly expanding the domain of safety-critical embedded systems, driven by the vision of the driverless car. This development makes it necessary to use high performance multi-core systems which are commercially available and provide more parallelism in terms of redundant execution units, however, at the cost of being less reliable. With the continuous down-scaling of semiconductor technology, computing hardware exhibits an increasing vulnerability against random hardware faults. Since these high-performance controller provide less or no hardware redundancy to ensure a safe execution of the application, software-only fault tolerance approaches are under current investigation. Our Scalable Software Support for Dependable Embedded Systems (S3DES) approach achieves fault tolerance by utilizing software-based triple modular redundancy for computational and optimized arithmetic encoded voter processes to ensure fault detection and error handling on application level. In S3DES voters are replicated to allow the compensation of voting failures. However, new challenges with regard to error propagation and multiple voting result outputs are introduced by this extension. We describe how mutual voter monitoring and threshold value checks could be used to establish a hierarchy among the replicated voters without re-introducing a reliability bottleneck in the sense of a single point of failure and resolve the aforementioned challenges.}, language = {en} } @inproceedings{OsinskiMottok, author = {Osinski, Lukas and Mottok, J{\"u}rgen}, title = {Control Flow Errors: A Discussion of Different Injection Strategies}, series = {32nd International Conference on Architecture of Computing Systems, ARCS Workshop 2019, 20-21 May 2019, Copenhagen, Denmark}, booktitle = {32nd International Conference on Architecture of Computing Systems, ARCS Workshop 2019, 20-21 May 2019, Copenhagen, Denmark}, pages = {1 -- 7}, abstract = {Among the available dependability assessment techniques, fault injection (FI) is widely adopted and strongly recommended by safety standards for the validation that functional and technical safety mechanisms are implemented correctly and effectively. The main challenge in fault injection assessments is the increasing complexity of system-on-chips as well as the increasing size of memory, which leads to enormous efforts to test every possible fault introduced to the system. Therefore, a number of publicly available fault injection frameworks utilize fault space pruning techniques to reduce the overall fault space and consequently the overall experiment duration. Most of the fault space pruning techniques mainly discuss the reduction of the number of data errors which have to be injected into registers and memory locations. However, control flow errors represent a further domain of possible errors on the application level. Usually for the evaluation of effectiveness of fault tolerance mechanisms against data errors, a single fault assumption at microarchitectural level (e.g. bit-flips) is assumed. In most cases, this assumption is equivalently applied to the program counter to investigate possible control flow errors. Due to this approach, the error space is consciously or unconsciously reduced to the possible erroneous jump targets that can be reached by a specific set of bit-flips in the program counter at a specified time during the program execution. This approach is considered valid regarding the corresponding fault assumption, but leads to negative effects on the significance of the injection and the resulting effectiveness of the tested fault tolerance mechanism. In this paper, we discuss different strategies for the analysis and injection of control flow errors and the resulting differences by considering the single fault assumption at microarchitectural and application level.}, language = {en} } @inproceedings{MottokReichenberger, author = {Mottok, J{\"u}rgen and Reichenberger, Marcus}, title = {Use of Static Analysis and Coding Guidelines in embedded Systems Software}, series = {1st Applied Research Conference, ARC 2019, 8 July 2019, Regensburg}, booktitle = {1st Applied Research Conference, ARC 2019, 8 July 2019, Regensburg}, publisher = {Pro BUSINESS}, isbn = {978-3-96409-182-6}, pages = {571 -- 578}, language = {en} } @inproceedings{OsinskiMottok, author = {Osinski, Lukas and Mottok, J{\"u}rgen}, title = {A Multicore Fault Tolerance Approach Based on Coded Processing}, series = {Embedded Real-Time Software and Systems Conference (ERST²), Jan 2018, Toulouse/France}, booktitle = {Embedded Real-Time Software and Systems Conference (ERST²), Jan 2018, Toulouse/France}, abstract = {Development trends for computing platforms moved from increasing the frequency of a single processor to increasing the parallelism with multiple cores on the same die. Multiple cores have strong potential to support cost-efficient fault tolerance due to their inherent spatial redundancy. This work makes a step towards software-only fault tolerance in the presence of permanent and transient hardware faults. Our approach utilizes software-based spatial triple modular redundancy and coded processing on a shared memory multi-core controller. We evaluate our approach on an Infineon AURIX TriBoard TC277 and provide experimental evidence for error resistance by fault injection campaigns with an iSystem iC5000 On-chip Analyzer.}, language = {en} } @inproceedings{RudolphVogetMottok, author = {Rudolph, Alexander and Voget, Stefan and Mottok, J{\"u}rgen}, title = {A consistent safety case argumentation for artificial intelligence in safety related automotive systems - An Evaluation of a New Conceptual Functional Safety Approach}, series = {Embedded Real-Time Software and Systems Conference (ERST²), Jan 2018, Toulouse/France}, booktitle = {Embedded Real-Time Software and Systems Conference (ERST²), Jan 2018, Toulouse/France}, abstract = {Regarding the actual automotive safety norms the use of artificial intelligence (AI) in safety critical environments like autonomous driving is not possible. This paper introduces a new conceptual safety modelling approach and a safety argumentation to certify AI algorithms in a safety related context. Therefore, a model of an AI-system is presented first. Afterwards, methods and safety argumentation are applied to the model, whereas it is limited to a specific subset of AI-systems, i.e. off-board learning deterministic neural networks in this case. Other cases are left over for future research. The result is a consistent safety analysis approach that applies state of the art safety argumentations from other domains to the automotive domain. This will enforce the adaptation of the functional safety norm ISO26262 to enable general AI methods in safety critical systems in future.}, language = {en} } @inproceedings{SchmidMottok, author = {Schmid, Michael and Mottok, J{\"u}rgen}, title = {Asynchronous Critical Sections in Real-Time Multiprocessor Systems}, series = {Architecture of Computing Systems - ARCS 2019, 32nd International Conference, Copenhagen, Denmark, May 20-23, 2019, Proceedings}, booktitle = {Architecture of Computing Systems - ARCS 2019, 32nd International Conference, Copenhagen, Denmark, May 20-23, 2019, Proceedings}, editor = {Schoeberl, Martin and Hochberger, Christian and Uhrig, Sascha and Brehm, J{\"u}rgen and Pionteck, Thilo}, publisher = {Springer}, address = {Cham}, doi = {10.1007/978-3-030-18656-2_5}, pages = {56 -- 67}, abstract = {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.}, language = {en} } @inproceedings{RennerPozzobonMottoketal., author = {Renner, Sebastian and Pozzobon, Enrico and Mottok, J{\"u}rgen and Hackenberg, Rudolf}, title = {Benchmarking Software Implementations of 1st Round Candidates of the NIST LWC Project on Microcontrollers}, series = {3rd Lightweight Cryptography Workshop at NIST, Gaithersburg, USA}, booktitle = {3rd Lightweight Cryptography Workshop at NIST, Gaithersburg, USA}, abstract = {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.}, language = {en} } @inproceedings{OsinskiMottok, author = {Osinski, Lukas and Mottok, J{\"u}rgen}, title = {S 3DES - Scalable Software Support for Dependable Embedded Systems}, series = {Architecture of Computing Systems - ARCS 2019, 32nd International Conference, Copenhagen, Denmark, May 20-23, 2019, Proceedings}, booktitle = {Architecture of Computing Systems - ARCS 2019, 32nd International Conference, Copenhagen, Denmark, May 20-23, 2019, Proceedings}, editor = {Schoeberl, Martin and Hochberger, Christian and Uhrig, Sascha and Brehm, J{\"u}rgen and Pionteck, Thilo}, publisher = {Springer}, address = {Cham}, doi = {10.1007/978-3-030-18656-2_2}, pages = {15 -- 27}, abstract = {Scalable Software Support for Dependable Embedded Systems (S3DES) achieves fault tolerance by utilizing spatial software-based triple modular redundancy for computational and voter processes on application level. Due to the parallel execution of the replicas on distinct CPU cores it makes a step towards software-based fault tolerance against transient and permanent random hardware errors. Additionally, the compliance with real-time requirements in terms of response time is enhanced compared to similar approaches. The replicated voters, the introduced mutual voter monitoring and the optimized arithmetic encoding allow the detection and compensation of voter failures without the utilization of backward recovery. Fault injection experiments on real hardware reveal that S3DES can detect and mask all injected data and program flow errors under a single fault assumption, whereas an uncoded voting scheme yields approx. 12\% silent data corruptions in a similar experiment.}, language = {en} } @inproceedings{HauserReuterGruberetal., author = {Hauser, Florian and Reuter, Rebecca and Gruber, Hans and Mottok, J{\"u}rgen}, title = {Research competence: Modification of a questionnaire to measure research competence at universities of applied sciences}, series = {IEEE Global Engineering Education Conference (EDUCON), 17-20 April 2018, Santa Cruz de Tenerife, Spain}, booktitle = {IEEE Global Engineering Education Conference (EDUCON), 17-20 April 2018, Santa Cruz de Tenerife, Spain}, doi = {10.1109/EDUCON.2018.8363216}, pages = {109 -- 117}, abstract = {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.}, language = {en} } @inproceedings{ReuterHauserGoldVeerkampetal., author = {Reuter, Rebecca and Hauser, Florian and Gold-Veerkamp, Carolin and Stark, Theresa and Kis, Juliane and Mottok, J{\"u}rgen and Abke, J{\"o}rg and Meyer, Dany}, title = {Towards the construction of a questionnaire for the identification of learning obstacles}, series = {2018 IEEE Global Engineering Education Conference (EDUCON 2018), 17-20 April, 2018, Santa Cruz de Tenerife, Spain}, booktitle = {2018 IEEE Global Engineering Education Conference (EDUCON 2018), 17-20 April, 2018, Santa Cruz de Tenerife, Spain}, doi = {10.1109/EDUCON.2018.8363266}, pages = {457 -- 466}, abstract = {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.}, language = {en} } @inproceedings{HauserMottokReuteretal., author = {Hauser, Florian and Mottok, J{\"u}rgen and Reuter, Rebecca and Hutzler, Ivonne and Gruber, Hans}, title = {Eye movement patterns in software engineering - What differs the expert from the novice?}, series = {IATED, 11th International Conference of Education, Research and Innovation (ICERI 2018), 12-14 November 2018, Seville, Spain}, booktitle = {IATED, 11th International Conference of Education, Research and Innovation (ICERI 2018), 12-14 November 2018, Seville, Spain}, doi = {10.21125/iceri.2018.1129}, language = {en} } @inproceedings{ReuterKnietzschHauseretal., author = {Reuter, Rebecca and Knietzsch, Marco and Hauser, Florian and Mottok, J{\"u}rgen}, title = {Supporting Abstraction Skills Using Augmented Reality?}, series = {ITiCSE '19, Proceedings of the 2019 ACM Conference on Innovation and Technology in Computer Science Education, July 2019, Aberdeen Scotland UK}, booktitle = {ITiCSE '19, Proceedings of the 2019 ACM Conference on Innovation and Technology in Computer Science Education, July 2019, Aberdeen Scotland UK}, doi = {10.1145/3304221.3325562}, abstract = {We investigated the potential of augmented reality (AR) to enable visualization of abstract concepts and present the first iteration of a teaching experiment that evaluates the use of AR as support for abstraction skills. Students were confronted with the task to present and explain information to different groups of stakeholders at the example of a coffee machine. Results show that students find it helpful to have a visual app-prototype and especially one that can be disassembled in different levels. The main goal was to sensitize students for the need to think about and to abstract information for certain roles and perspectives.}, language = {en} } @inproceedings{HauserGegenfurtnerHutzleretal., author = {Hauser, Florian and Gegenfurtner, Andreas and Hutzler, Ivonne and Reuter, Rebecca and Mottok, J{\"u}rgen}, title = {Eye movement patterns in source code review}, series = {EARLI SIG 17 and 25 Biennial Conference 2018, Cambridge, United Kingdom}, booktitle = {EARLI SIG 17 and 25 Biennial Conference 2018, Cambridge, United Kingdom}, abstract = {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.}, language = {en} } @inproceedings{OsinskiLangerSchmidetal., author = {Osinski, Lukas and Langer, Tobias and Schmid, Michael and Mottok, J{\"u}rgen}, title = {PyFI - Fault Injection Plattform for Real Hardware}, series = {31th International Conference on Architecture of Computing Systems, ARCS Workshop 9-12 April 2018, Braunschweig, Germany}, booktitle = {31th International Conference on Architecture of Computing Systems, ARCS Workshop 9-12 April 2018, Braunschweig, Germany}, pages = {1 -- 7}, abstract = {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.}, language = {en} } @inproceedings{OsinskiLangerMaderetal., author = {Osinski, Lukas and Langer, Tobias and Mader, Ralph and Mottok, J{\"u}rgen}, title = {Challenges and Opportunities with Embedded Multicore Platforms}, series = {9th European Congress Embedded Real Time Software and Systems (ERTS 2018), January 31st to Febraury 2nd 2018, Toulouse, France}, booktitle = {9th European Congress Embedded Real Time Software and Systems (ERTS 2018), January 31st to Febraury 2nd 2018, Toulouse, France}, language = {en} } @inproceedings{LangerOsinskiSchmidetal., author = {Langer, Tobias and Osinski, Lukas and Schmid, Michael and Mottok, J{\"u}rgen}, title = {Work-in-Progress: Real-Time Scheduling of Parallel Applications with Gang Scheduling}, series = {International Conference on Architecture of Computing Systems (ARCS) Workshop, 9-12 April 2018, Braunschweig, Germany}, booktitle = {International Conference on Architecture of Computing Systems (ARCS) Workshop, 9-12 April 2018, Braunschweig, Germany}, abstract = {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.}, language = {en} } @inproceedings{SoskaMottok, author = {Soska, Alexander and Mottok, J{\"u}rgen}, title = {An Integrated Puzzle Game for Learning Programming Based on Students Syntactical Errors}, series = {11th European Conference on Game-Based Learning, Oct 5 - Oct 6, 2017, Graz}, booktitle = {11th European Conference on Game-Based Learning, Oct 5 - Oct 6, 2017, Graz}, editor = {Pivec, M. and Gr{\"u}ndler, J.}, publisher = {Academic Conferences and Publishing International}, abstract = {Practical implementations are important for understanding the concepts and principles of programming. Self-employed coding encourages learners to acquire learning content and fosters the theory-practice transfer. Thereby, the earners face various difficulties and obstacles. Misconceptions and faults accompany the learners' coding process and result in non-executable coding artefacts. The integrated compiler of programming environments provides information concerning error messages that indicate incorrect coding constructs. Usually due to unspecific and generic formulation, learners find it hard to understand these error messages. Yet these observable errors give valuable information about the learner's coding behaviour and indicate current problems. These provide a link for adopted and appropriate learning assistance during the coding process. In this work in progress paper, we present first assumptions in assisting learners' understanding and correction of programming errors by a game-based learning method. Our first approach focuses on the integration of a puzzle game into a programming environment. The game content adjusts to the error messages based on the analysis of the learner's log file. We suggest that the integration of this approach rises the learner's motivation to self-employed error handling and the quality of learning programming.}, language = {en} } @inproceedings{HauserReuterGegenfurtneretal., author = {Hauser, Florian and Reuter, Rebecca and Gegenfurtner, Andreas and Gruber, Hans and Mottok, J{\"u}rgen}, title = {Eye movements in software modelling - what do they tell us about heuristics}, series = {12th International Conference of Education, Research and Innovation (ICERI 2019), Conference Proceedings, 2019, Seville (Spain)}, booktitle = {12th International Conference of Education, Research and Innovation (ICERI 2019), Conference Proceedings, 2019, Seville (Spain)}, isbn = {978-84-09-14755-7}, doi = {10.21125/iceri.2019.1469}, pages = {6064 -- 6070}, language = {en} } @inproceedings{SeidlKraemerMottok, author = {Seidl, M. and Kr{\"a}mer, Stefan and Mottok, J{\"u}rgen}, title = {Improving the reliability of an embedded real-time system by applying coded processing}, series = {4th Applied Research Conference, 5th July 2014, Ingolstadt}, booktitle = {4th Applied Research Conference, 5th July 2014, Ingolstadt}, publisher = {Shaker}, address = {Aachen}, isbn = {978-3-8440-2875-1}, pages = {70 -- 74}, language = {en} } @inproceedings{HanschStaudteGerhageretal., author = {Hansch, G. and Staudte, Ch. and Gerhager, S. and Hackenberg, Rudolf and Mottok, J{\"u}rgen}, title = {Migration path for secure and economic smart power grid devices with transitional smart metering support}, series = {Applied Research Conference 2012 (ARC 2012), 25./26. June 2012 Nuremberg}, booktitle = {Applied Research Conference 2012 (ARC 2012), 25./26. June 2012 Nuremberg}, editor = {Mottok, J{\"u}rgen and Ziemann, Olaf}, publisher = {Shaker}, address = {Aachen}, isbn = {2012 978-3-8440-1093-0}, pages = {63 -- 69}, language = {en} } @inproceedings{Mottok, author = {Mottok, J{\"u}rgen}, title = {General purpose computing on graphics processing unit by using cuda}, series = {Applied Research Conference 2011 (ARC 2011), 6. April, Regensburg}, booktitle = {Applied Research Conference 2011 (ARC 2011), 6. April, Regensburg}, language = {en} } @article{RaabKraemerMottoketal., author = {Raab, Peter and Kr{\"a}mer, Stefan and Mottok, J{\"u}rgen and Vavricka, Vlastimil}, title = {Isomorphism between Linear Codes and Arithmetic Codes for Safe Data Processing in Embedded Software Systems}, series = {Computing and Informatics (CAI)}, volume = {33}, journal = {Computing and Informatics (CAI)}, pages = {721 -- 734}, abstract = {We present a transformation rule to convert linear codes into arithmetic codes. Linear codes are usually used for error detection and correction in broadcast and storage systems. In contrast, arithmetic codes are very suitable for protection of software processing in computer systems. This paper shows how to transform linear codes protecting the data stored in a computer system into arithmetic codes safeguarding the operations built on this data. Combination of the advantages of both coding mechanisms will increase the error detection capability in safety critical applications for embedded systems by detection and correction of arbitrary hardware faults.}, language = {en} } @inproceedings{MottokGardeia, author = {Mottok, J{\"u}rgen and Gardeia, Armin}, title = {The regensburg concept of p-seminars - how to organize the interface between secondary school and university education to create a didactic cooperation between teaching and learning of software engineering with lego mindstorms nxt embedded robot systems}, series = {2011 IEEE Global Engineering Education Conference (EDUCON), Amman, Jordan, 2011}, booktitle = {2011 IEEE Global Engineering Education Conference (EDUCON), Amman, Jordan, 2011}, doi = {10.1109/EDUCON.2011.5773255}, pages = {917 -- 920}, abstract = {This paper describes the background and the theory of the learning arrangement "The Regensburg Concept of P 1 - Seminars" and its potential fields of application. This conception was designed to meet the various requirements caused by the Bologna Accords and the restructuring of the senior years of German secondary school education. At the same time it aims at finding solutions for a severe problem topical in Germany: the lack of students qualifying in MINT (the fields of mathematics, informatics, natural sciences and techniques.) The focus of this conception is on the cooperation between universities and schools hence a draft of the P-Seminar has already been realized and evaluated during a pilot phase at a local secondary school. These experiences serve as a solid basis for the development of a concrete plan that makes it possible to transfer the concept to similar projects in future. In the following paragraphs keywords that are applied to the lexical field of the Regensburg Concept are elaborated e.g. "practive learning", an interaction of practical and active learning.}, language = {en} } @inproceedings{BraunMottokMiedletal., author = {Braun, J{\"u}rgen and Mottok, J{\"u}rgen and Miedl, Christian and Geyer, Dirk and Minas, Mark}, title = {Overview and Evaluation of Fail-Safe and Fault-Tolerant Mechanisms for the Electromobility according to ISO26262}, series = {1st International Electromobility Congress, 12. - 13. 5. 2011, Prague}, booktitle = {1st International Electromobility Congress, 12. - 13. 5. 2011, Prague}, pages = {5}, language = {en} } @inproceedings{StappertJonssonMottoketal., author = {Stappert, Friedhelm and Jonsson, Jan and Mottok, J{\"u}rgen and Johansson, Rolf}, title = {A Design Framework for End-to-End Timing Constrained Automotive}, series = {5th Embedded Real Time Software and Systems Conference (ERTS2 2010), May 2010, Toulouse, France}, booktitle = {5th Embedded Real Time Software and Systems Conference (ERTS2 2010), May 2010, Toulouse, France}, language = {en} } @inproceedings{DeubzerMargullMottoketal., author = {Deubzer, Michael and Margull, Ulrich and Mottok, J{\"u}rgen and Niemetz, Michael and Wirrer, Gerhard}, title = {Partly Proportionate Fair Multiprocessor Scheduling of Heterogeneous Task Systems}, series = {5th Embedded Real Time Software and Systems Conference, May 2010}, booktitle = {5th Embedded Real Time Software and Systems Conference, May 2010}, abstract = {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.}, language = {en} } @inproceedings{RaabKraemerMottoketal., author = {Raab, Peter and Kr{\"a}mer, Stefan and Mottok, J{\"u}rgen and Meier, Hans and Racek, Stanislav}, title = {Safe software processing by concurrent execution in a real-time operating system}, series = {16th International Conference on Applied Electronics (AE 2011), 2011, Pilsen, Czech Republic}, booktitle = {16th International Conference on Applied Electronics (AE 2011), 2011, Pilsen, Czech Republic}, pages = {315 -- 319}, abstract = {The requirements for safety-related software systems increases rapidly. To detect arbitrary hardware faults, there are applicable coding mechanism, that add redundancy to the software. In this way it is possible to replace conventional multi-channel hardware and so reduce costs. Arithmetic codes are one possibility of coded processing and are used in this approach. A further approach to increase fault tolerance is the multiple execution of certain critical parts of software. This kind of time redundancy is easily realized by the parallel processing in an operating system. Faults in the program flow can be monitored. No special compilers, that insert additional generated code into the existing program, are required. The usage of multi-core processors would further increase the performance of such multi-channel software systems. In this paper we present the approach of program flow monitoring combined with coded processing, which is encapsulated in a library of coded data types. The program flow monitoring is indirectly realized by means of an operating system.}, language = {en} } @inproceedings{Mottok, author = {Mottok, J{\"u}rgen}, title = {Ses and the iso 26262}, series = {Applied Research Conference 2011 (ARC 2011), 6. April, Regensburg}, booktitle = {Applied Research Conference 2011 (ARC 2011), 6. April, Regensburg}, language = {en} } @inproceedings{RaabKraemerMottok, author = {Raab, Peter and Kr{\"a}mer, Stefan and Mottok, J{\"u}rgen}, title = {Cyclic codes and error detection during data processing in embedded software systems}, series = {Proceedings of the 4rd Embedded Software Engineering Congress (ESE), 5.-9. Dezember 2011, Sindelfingen}, booktitle = {Proceedings of the 4rd Embedded Software Engineering Congress (ESE), 5.-9. Dezember 2011, Sindelfingen}, pages = {577 -- 590}, language = {en} } @inproceedings{SteindlMottokMeieretal., author = {Steindl, Michael and Mottok, J{\"u}rgen and Meier, Hans and Schiller, Frank and Fr{\"u}chtl, M.}, title = {Safeguarded Processing of Sensor Data}, series = {5th Embedded Real Time Software and Systems Conference (ERTS2 2010), May 2010, Toulouse, France}, booktitle = {5th Embedded Real Time Software and Systems Conference (ERTS2 2010), May 2010, Toulouse, France}, language = {en} } @article{KraemerMottokMeier, author = {Kr{\"a}mer, Stefan and Mottok, J{\"u}rgen and Meier, Hans}, title = {Multi-Core Scheduling in Embedded Systemen, Teil 3}, series = {Hanser Automotive}, journal = {Hanser Automotive}, number = {5-6}, pages = {14 -- 16}, language = {en} } @article{KraemerMottokMeier, author = {Kr{\"a}mer, Stefan and Mottok, J{\"u}rgen and Meier, Hans}, title = {Multi-Core Scheduling in Embedded Systemen, Teil 1}, series = {Hanser Automotive}, journal = {Hanser Automotive}, number = {1-2}, pages = {18 -- 22}, language = {en} } @article{KraemerMottokMeier, author = {Kr{\"a}mer, Stefan and Mottok, J{\"u}rgen and Meier, Hans}, title = {Multi-Core Scheduling in Embedded Systemen, Teil 2}, series = {Hanser Automotive}, journal = {Hanser Automotive}, number = {3-4}, pages = {23 -- 25}, language = {en} } @inproceedings{BaerwaldHauffMottok, author = {B{\"a}rwald, Andreas and Hauff, Harald and Mottok, J{\"u}rgen}, title = {Qualification and Certification of Development Tools for Safety-Critical Applications}, series = {Automotive Safety \& Security}, booktitle = {Automotive Safety \& Security}, pages = {135 -- 149}, abstract = {This paper presents an overview on qualification and certification of tools used in the phases of the safety lifecycle for safety-critical applications, either for development or for verification and validation. Software development tools are widely used in the development of safety-critical software systems. More verification and validation procedures will be automated by software tools to reduce time consuming manual testing. The impact of software tools on functional safety is discussed. Based on normative regulations like IEC 61508 and ISO DIS 26262 different approaches for tool qualification and certification are presented.}, language = {en} } @article{DeubzerMottokMargulletal., author = {Deubzer, Michael and Mottok, J{\"u}rgen and Margull, Ulrich and Niemetz, Michael and Wirrer, Gerhard}, title = {Efficient Scheduling of Reliable Automotive Multi-core Systems with PD² by Weakening ERfair Task System Requirements}, series = {Automotive Safety and Security}, journal = {Automotive Safety and Security}, pages = {53 -- 67}, abstract = {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.}, language = {en} } @article{BaerwaldHauffMottok, author = {B{\"a}rwald, Andreas and Hauff, Harald and Mottok, J{\"u}rgen}, title = {Certification of safety relevant systems - Benefits of using pre-certified components}, series = {Automotive Safety and Security}, journal = {Automotive Safety and Security}, language = {en} } @inproceedings{SteindlMottokMeier, author = {Steindl, Michael and Mottok, J{\"u}rgen and Meier, Hans}, title = {SES-based Framework for Fault-tolerant Systems}, series = {8th IEEE Workshop on Intelligent Solutions in Embedded Systems, Heraklion, Greece, July 2010}, booktitle = {8th IEEE Workshop on Intelligent Solutions in Embedded Systems, Heraklion, Greece, July 2010}, doi = {10.1109/WISES.2010.5548427}, pages = {12 -- 16}, abstract = {Embedded real-time systems are often used in harsh environments, for example engine control systems in automotive vehicles. In such ECUs (Engine Control Unit) faults can lead to serious accidents. In this paper we propose a safety embedded architecture based on coded processing. This framework only needs two channels to provide fault tolerance and allows the detection and identification of permanent and transient faults. Once a fault is detected by an observer unit the SES guard makes it visible and initiates a suitable failure reaction.}, language = {en} } @inproceedings{SchorerKuntzMottok, author = {Schorer, Michael and Kuntz, Stefan and Mottok, J{\"u}rgen}, title = {Verification of Behavioral Compatibility in the Virtual Integration Methodology}, series = {8th IEEE Workshop on Intelligent Solutions in Embedded Systems,Heraklion, Greece, July 2010}, booktitle = {8th IEEE Workshop on Intelligent Solutions in Embedded Systems,Heraklion, Greece, July 2010}, doi = {10.1109/WISES.2010.5548424}, pages = {35 -- 42}, abstract = {The advantages of component-based systems include reuse of generic components as well as adaption through variants. However, they bare a high risk of containing incompatibilities between components, due to the lack of control over the integration-relevant aspects of their components. Current development processes are able to detect incompatibilities between components only at very late stages of system development. The Virtual Integration methodology is an approach to detect and to solve compatibility issues during early stages of system design. The methodology supports developers with a set of measures to reduce the risk of incompatibilities to a minimum at each abstraction layer of their system architecture. Realtime requirements of embedded systems make it necessary to support the methodology with a formal model, which can describe dynamic properties of these systems. In our approach, we use interface automata because they offer a lightweight formalism to describe the behavior of components and to verify their compatibility based on these descriptions. In a feasibility study we show, to which extend interface automata are adequate for the foresaid purpose in the automotive application field.}, language = {en} } @inproceedings{HobelsbergerDumkeMottoketal., author = {Hobelsberger, Martin and Dumke, Reiner and Mottok, J{\"u}rgen and Niemetz, Michael and Wirrer, Gerhard}, title = {An Experience-Based Repository of Reusable Components for an Component-Based Automotive Software System}, series = {Applied Software Measurement, proceedings of the joined International Conferences on Software Measurement IWSM/MetriKon/Mensura 2010, 10.-12. November 2010, Stuttgart, Germany}, booktitle = {Applied Software Measurement, proceedings of the joined International Conferences on Software Measurement IWSM/MetriKon/Mensura 2010, 10.-12. November 2010, Stuttgart, Germany}, pages = {218 -- 240}, language = {en} } @inproceedings{DeubzerHobelsbergerMottoketal., author = {Deubzer, Michael and Hobelsberger, Martin and Mottok, J{\"u}rgen and Schiller, Frank and Dumke, Reiner and Siegle, Markus and Margull, Ulrich and Niemetz, Michael and Wirrer, Gerhard}, title = {Modeling and Simulation of Embedded Real-Time Multi-Core Systems}, series = {Proceedings of the 3rd Embedded Software Engineering Congress, 7. bis 9. Dezember 2010, Sindelfingen}, booktitle = {Proceedings of the 3rd Embedded Software Engineering Congress, 7. bis 9. Dezember 2010, Sindelfingen}, language = {en} } @inproceedings{BraunMottokMiedletal., author = {Braun, J{\"u}rgen and Mottok, J{\"u}rgen and Miedl, Christian and Greyer, D. and Minas, Mark}, title = {Fail-Safe und Fault-Tolerant Mechanismen}, series = {Proceedings of the 3rd Embedded Software Engineering Congress, 7. bis 9. Dezember 2010, Sindelfingen}, booktitle = {Proceedings of the 3rd Embedded Software Engineering Congress, 7. bis 9. Dezember 2010, Sindelfingen}, pages = {378 -- 386}, language = {en} } @inproceedings{SteindlMottokMeieretal., author = {Steindl, Michael and Mottok, J{\"u}rgen and Meier, Hans and Schiller, Frank and Fr{\"u}chtl, M.}, title = {Safeguarded Processing of Sensor Data}, series = {IT-SecurityArea (IT-SA 2009) vom 13.-15. Oktober 2009, N{\"u}rnberg}, booktitle = {IT-SecurityArea (IT-SA 2009) vom 13.-15. Oktober 2009, N{\"u}rnberg}, pages = {8}, abstract = {The spectrum of software tasks no longer includes only rare function controlling tasks for sensor actuator chains in reactive embedded systems. However, more and more responsible challenges like safety-critical scenarios are tackled. Therefore sensor data have to be safeguarded by several mechanism. An obvious and widely used approach is the use of two redundant hardware controllers, but this comes along with an additional cost, space and energy factor. Another way to fulfill certain safety properties is to implement a second diverse software channel in a single micro-controller architecture according the Safely Embedded Software (SES) approach. However, a lack of performance occurs by implementing this diverse channel for complex computations e.g. floating-point operations. This paper gives an approach for transferring the SES into a coprocessor and to migrate SES to a flexible and powerful FPGA architecture.}, language = {en} } @inproceedings{SteindlMottokMeieretal., author = {Steindl, Michael and Mottok, J{\"u}rgen and Meier, Hans and Schiller, Frank and Fr{\"u}chtl, M.}, title = {Migration of SES to FPGA Based Architectural Concepts}, series = {Proceedings of the Workshop 'Safely embedded software'}, booktitle = {Proceedings of the Workshop 'Safely embedded software'}, language = {en} }