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Documents authored by Kowalewski, Stefan

Document
DOI: 10.4230/OASIcs.ASD.2020.4
Agile Requirement Engineering for a Cloud System for Automated and Networked Vehicles

Authors: Armin Mokhtarian, Alexandru Kampmann, Bassam Alrifaee, Stefan Kowalewski, Bastian Lampe, and Lutz Eckstein

Published in: OASIcs, Volume 79, 2nd International Workshop on Autonomous Systems Design (ASD 2020)

Abstract
This paper presents a methodology for the agile development of a cloud system in a multi-partner project centered around automated vehicles. Besides providing an external environment model as an additional input to the automation, the cloud system is also the main gateway for users to interact with automated vehicles through applications on mobile devices. Multiple factors are posing a challenge in our context. Coordination becomes especially challenging, as stakeholders are spread among different locations with backgrounds from various domains. Furthermore, automated vehicles for different applications, such as delivery or taxi services, give rise to a large number of use cases that our cloud system has to support. For our agile development process, we use standardized templates for the description of use-cases, which are initialized from storyboards and iteratively refined by stakeholders. These use-case templates are subsequently transformed into machine-readable specifications, which allows for generation of REST APIs for our cloud system.
Cite as

Armin Mokhtarian, Alexandru Kampmann, Bassam Alrifaee, Stefan Kowalewski, Bastian Lampe, and Lutz Eckstein. Agile Requirement Engineering for a Cloud System for Automated and Networked Vehicles. In 2nd International Workshop on Autonomous Systems Design (ASD 2020). Open Access Series in Informatics (OASIcs), Volume 79, pp. 4:1-4:8, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2020)

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@InProceedings{mokhtarian_et_al:OASIcs.ASD.2020.4,
  author =	{Mokhtarian, Armin and Kampmann, Alexandru and Alrifaee, Bassam and Kowalewski, Stefan and Lampe, Bastian and Eckstein, Lutz},
  title =	{{Agile Requirement Engineering for a Cloud System for Automated and Networked Vehicles}},
  booktitle =	{2nd International Workshop on Autonomous Systems Design (ASD 2020)},
  pages =	{4:1--4:8},
  series =	{Open Access Series in Informatics (OASIcs)},
  ISBN =	{978-3-95977-141-2},
  ISSN =	{2190-6807},
  year =	{2020},
  volume =	{79},
  editor =	{Steinhorst, Sebastian and Deshmukh, Jyotirmoy V.},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/OASIcs.ASD.2020.4},
  URN =		{urn:nbn:de:0030-drops-125983},
  doi =		{10.4230/OASIcs.ASD.2020.4},
  annote =	{Keywords: agile requirements engineering, cloud architecture, automated vehicles}
}
Document
DOI: 10.4230/OASIcs.SSV.2011.32
Adaptable Value-Set Analysis for Low-Level Code

Authors: Jörg Brauer, René Rydhof Hansen, Stefan Kowalewski, Kim G. Larsen, and Mads Chr. Olesen

Published in: OASIcs, Volume 24, 6th International Workshop on Systems Software Verification (2012)

Abstract
This paper presents a framework for binary code analysis that uses only SAT-based algorithms. Within the framework, incremental SAT solving is used to perform a form of weakly relational value-set analysis in a novel way, connecting the expressiveness of the value sets to computational complexity. Another key feature of our framework is that it translates the semantics of binary code into an intermediate representation. This allows for a straightforward translation of the program semantics into Boolean logic and eases the implementation efforts, too. We show that leveraging the efficiency of contemporary SAT solvers allows us to prove interesting properties about medium-sized microcontroller programs.
Cite as

Jörg Brauer, René Rydhof Hansen, Stefan Kowalewski, Kim G. Larsen, and Mads Chr. Olesen. Adaptable Value-Set Analysis for Low-Level Code. In 6th International Workshop on Systems Software Verification. Open Access Series in Informatics (OASIcs), Volume 24, pp. 32-43, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2012)

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@InProceedings{brauer_et_al:OASIcs.SSV.2011.32,
  author =	{Brauer, J\"{o}rg and Hansen, Ren\'{e} Rydhof and Kowalewski, Stefan and Larsen, Kim G. and Olesen, Mads Chr.},
  title =	{{Adaptable Value-Set Analysis for Low-Level Code}},
  booktitle =	{6th International Workshop on Systems Software Verification},
  pages =	{32--43},
  series =	{Open Access Series in Informatics (OASIcs)},
  ISBN =	{978-3-939897-36-1},
  ISSN =	{2190-6807},
  year =	{2012},
  volume =	{24},
  editor =	{Brauer, J\"{o}rg and Roveri, Marco and Tews, Hendrik},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/OASIcs.SSV.2011.32},
  URN =		{urn:nbn:de:0030-drops-35884},
  doi =		{10.4230/OASIcs.SSV.2011.32},
  annote =	{Keywords: Abstract interpretation, SAT solving, embedded systems}
}
Document
DOI: 10.4230/OASIcs.SSV.2011.71
Automatic Derivation of Abstract Semantics From Instruction Set Descriptions

Authors: Dominique Gückel and Stefan Kowalewski

Published in: OASIcs, Volume 24, 6th International Workshop on Systems Software Verification (2012)

Abstract
Abstracted semantics of instructions of processor-based architectures are an invaluable asset for several formal verification techniques, such as software model checking and static analysis. In the field of model checking, abstract versions of instructions can help counter the state explosion problem, for instance by replacing explicit values by symbolic representations of sets of values. Similar to this, static analyses often operate on an abstract domain in order to reduce complexity, guarantee termination, or both. Hence, for a given microcontroller, the task at hand is to find such abstractions. Due to the large number of available microcontrollers, some of which are even created for specific applications, it is impracticable to rely on human developers to perform this step. Therefore, we propose a technique that starts from imperative descriptions of instructions, which allows to automate most of the process.
Cite as

Dominique Gückel and Stefan Kowalewski. Automatic Derivation of Abstract Semantics From Instruction Set Descriptions. In 6th International Workshop on Systems Software Verification. Open Access Series in Informatics (OASIcs), Volume 24, pp. 71-83, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2012)

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@InProceedings{guckel_et_al:OASIcs.SSV.2011.71,
  author =	{G\"{u}ckel, Dominique and Kowalewski, Stefan},
  title =	{{Automatic Derivation of Abstract Semantics From Instruction Set Descriptions}},
  booktitle =	{6th International Workshop on Systems Software Verification},
  pages =	{71--83},
  series =	{Open Access Series in Informatics (OASIcs)},
  ISBN =	{978-3-939897-36-1},
  ISSN =	{2190-6807},
  year =	{2012},
  volume =	{24},
  editor =	{Brauer, J\"{o}rg and Roveri, Marco and Tews, Hendrik},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/OASIcs.SSV.2011.71},
  URN =		{urn:nbn:de:0030-drops-35919},
  doi =		{10.4230/OASIcs.SSV.2011.71},
  annote =	{Keywords: Model Checking, Static Analysis, Hardware Description Languages}
}
Document
DOI: 10.4230/OASIcs.MEMICS.2010.101
Test-Case Generation for Embedded Binary Code Using Abstract Interpretation

Authors: Thomas Reinbacher, Jörg Brauer, Martin Horauer, Andreas Steininger, and Stefan Kowalewski

Published in: OASIcs, Volume 16, Sixth Doctoral Workshop on Mathematical and Engineering Methods in Computer Science (MEMICS'10) -- Selected Papers (2011)

Abstract
This paper describes a framework for test-case generation for microcontroller binary programs using abstract interpretation techniques. The key idea of our approach is to derive program invariants a priori, and then use backward analysis to obtain test vectors that are executed on the target microcontroller. Due to the structure of binary code, the abstract interpretation framework is based on propositional encodings of the program semantics and SAT solving.
Cite as

Thomas Reinbacher, Jörg Brauer, Martin Horauer, Andreas Steininger, and Stefan Kowalewski. Test-Case Generation for Embedded Binary Code Using Abstract Interpretation. In Sixth Doctoral Workshop on Mathematical and Engineering Methods in Computer Science (MEMICS'10) -- Selected Papers. Open Access Series in Informatics (OASIcs), Volume 16, pp. 101-108, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2011)

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@InProceedings{reinbacher_et_al:OASIcs.MEMICS.2010.101,
  author =	{Reinbacher, Thomas and Brauer, J\"{o}rg and Horauer, Martin and Steininger, Andreas and Kowalewski, Stefan},
  title =	{{Test-Case Generation for Embedded Binary Code Using Abstract Interpretation}},
  booktitle =	{Sixth Doctoral Workshop on Mathematical and Engineering Methods in Computer Science (MEMICS'10) -- Selected Papers},
  pages =	{101--108},
  series =	{Open Access Series in Informatics (OASIcs)},
  ISBN =	{978-3-939897-22-4},
  ISSN =	{2190-6807},
  year =	{2011},
  volume =	{16},
  editor =	{Matyska, Ludek and Kozubek, Michal and Vojnar, Tomas and Zemcik, Pavel and Antos, David},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/OASIcs.MEMICS.2010.101},
  URN =		{urn:nbn:de:0030-drops-30586},
  doi =		{10.4230/OASIcs.MEMICS.2010.101},
  annote =	{Keywords: Test-Case Generation, Embedded Binary Code, Abstract Interpretation}
}
Document
DOI: 10.4230/DagSemProc.05402.1
Dagstuhl-Manifest zur Strategischen Bedeutung des Software Engineering in Deutschland

Authors: Manfred Broy, Matthias Jarke, Manfred Nagl, Hans Dieter Rombach, Armin B. Cremers, Jürgen Ebert, Sabine Glesner, Martin Glinz, Michael Goedicke, Gerhard Goos, Volker Gruhn, Wilhelm Hasselbring, Stefan Jähnichen, Stefan Kowalewski, Bernd J. Krämer, Stefan Leue, Claus Lewerentz, Peter Liggesmeyer, Christoph Lüth, Barbara Paech, Helmut A. Partsch, Ilka Philippow, Lutz Prechelt, Andreas Rausch, Willem-Paul de Roever, Bernhard Rumpe, Gudula Rünger, Wilhelm Schäfer, Kurt Schneider, Andy Schürr, Walter F. Tichy, Bernhard Westfechtel, Wolf Zimmermann, and Albert Zündorf

Published in: Dagstuhl Seminar Proceedings, Volume 5402, Perspectives Workshop (2006)

Abstract
Im Rahmen des Dagstuhl Perspektiven Workshop 05402 "Challenges for Software Engineering Research" haben führende Software Engineering Professoren den derzeitigen Stand der Softwaretechnik in Deutschland charakterisiert und Handlungsempfehlungen für Wirtschaft, Forschung und Politik abgeleitet. Das Manifest fasst die diese Empfehlungen und die Bedeutung und Entwicklung des Fachgebiets prägnant zusammen.
Cite as

Manfred Broy, Matthias Jarke, Manfred Nagl, Hans Dieter Rombach, Armin B. Cremers, Jürgen Ebert, Sabine Glesner, Martin Glinz, Michael Goedicke, Gerhard Goos, Volker Gruhn, Wilhelm Hasselbring, Stefan Jähnichen, Stefan Kowalewski, Bernd J. Krämer, Stefan Leue, Claus Lewerentz, Peter Liggesmeyer, Christoph Lüth, Barbara Paech, Helmut A. Partsch, Ilka Philippow, Lutz Prechelt, Andreas Rausch, Willem-Paul de Roever, Bernhard Rumpe, Gudula Rünger, Wilhelm Schäfer, Kurt Schneider, Andy Schürr, Walter F. Tichy, Bernhard Westfechtel, Wolf Zimmermann, and Albert Zündorf. Dagstuhl-Manifest zur Strategischen Bedeutung des Software Engineering in Deutschland. In Perspectives Workshop. Dagstuhl Seminar Proceedings, Volume 5402, pp. 1-16, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2006)

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@InProceedings{broy_et_al:DagSemProc.05402.1,
  author =	{Broy, Manfred and Jarke, Matthias and Nagl, Manfred and Rombach, Hans Dieter and Cremers, Armin B. and Ebert, J\"{u}rgen and Glesner, Sabine and Glinz, Martin and Goedicke, Michael and Goos, Gerhard and Gruhn, Volker and Hasselbring, Wilhelm and J\"{a}hnichen, Stefan and Kowalewski, Stefan and Kr\"{a}mer, Bernd J. and Leue, Stefan and Lewerentz, Claus and Liggesmeyer, Peter and L\"{u}th, Christoph and Paech, Barbara and Partsch, Helmut A. and Philippow, Ilka and Prechelt, Lutz and Rausch, Andreas and de Roever, Willem-Paul and Rumpe, Bernhard and R\"{u}nger, Gudula and Sch\"{a}fer, Wilhelm and Schneider, Kurt and Sch\"{u}rr, Andy and Tichy, Walter F. and Westfechtel, Bernhard and Zimmermann, Wolf and Z\"{u}ndorf, Albert},
  title =	{{Dagstuhl-Manifest zur Strategischen Bedeutung des Software Engineering in Deutschland}},
  booktitle =	{Perspectives Workshop},
  pages =	{1--16},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2006},
  volume =	{5402},
  editor =	{Manfred Broy and Manfred Nagl and Hans Dieter Rombach and Matthias Jarke},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DagSemProc.05402.1},
  URN =		{urn:nbn:de:0030-drops-5853},
  doi =		{10.4230/DagSemProc.05402.1},
  annote =	{Keywords: Software Engineering, Software Technik, Strategie}
}
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