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Documents authored by Engels, Gregor

Document
DOI: 10.4230/DagRep.9.7.40
Values in Computing (Dagstuhl Seminar 19291)

Authors: Christoph Becker, Gregor Engels, Andrew Feenberg, Maria Angela Ferrario, and Geraldine Fitzpatrick

Published in: Dagstuhl Reports, Volume 9, Issue 7 (2020)

Abstract
Values are deeply held principles guiding decisions of individuals, groups and organizations. Computing technologies are inevitably affected by values: through their design, values become embodied and enacted. However, some values are easier to quantify and articulate than others; for example, the financial value of a software product is easier to measure than its `fairness'. As a result, less measurable values are often dismissed in decision making processes as lacking evidence. This is particularly problematic since research shows that less measurable values tend to be more strongly associated with sustainable practices than easier to quantify ones; it also indicates that the systems we design are likely to be inadequate for tackling long-term complex societal problems such as environmental change and health-related challenges that so often computing technologies are asked to address. This seminar aims to examine the complex relations between values, computing technologies and society. It does so by bringing together practitioners and researchers from several areas within and beyond computer science, including human computer interaction, software engineering, computer ethics, moral philosophy, philosophy of technology, data science and critical data studies. The outcomes include concrete cases examined through diverse disciplinary perspectives and guidelines for values in computing research, development and education, which are expressed in this report.
Cite as

Christoph Becker, Gregor Engels, Andrew Feenberg, Maria Angela Ferrario, and Geraldine Fitzpatrick. Values in Computing (Dagstuhl Seminar 19291). In Dagstuhl Reports, Volume 9, Issue 7, pp. 40-77, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2019)

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@Article{becker_et_al:DagRep.9.7.40,
  author =	{Becker, Christoph and Engels, Gregor and Feenberg, Andrew and Ferrario, Maria Angela and Fitzpatrick, Geraldine},
  title =	{{Values in Computing (Dagstuhl Seminar 19291)}},
  pages =	{40--77},
  journal =	{Dagstuhl Reports},
  ISSN =	{2192-5283},
  year =	{2019},
  volume =	{9},
  number =	{7},
  editor =	{Becker, Christoph and Engels, Gregor and Feenberg, Andrew and Ferrario, Maria Angela and Fitzpatrick, Geraldine},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/DagRep.9.7.40},
  URN =		{urn:nbn:de:0030-drops-116358},
  doi =		{10.4230/DagRep.9.7.40},
  annote =	{Keywords: computing in society, responsible innovation, sustainability informatics computer ethics, philosophy of technology and moral philosophy}
}
Document
DOI: 10.4230/DagSemProc.10431.3
Software Engineering for Self-Adaptive Systems: A second Research Roadmap

Authors: Rogerio de Lemos, Holger Giese, Hausi Müller, Mary Shaw, Jesper Andersson, Luciano Baresi, Basil Becker, Nelly Bencomo, Yuriy Brun, Bojan Cikic, Ron Desmarais, Schahram Dustdar, Gregor Engels, Kurt Geihs, Karl M. Goeschka, Alessandra Gorla, Vincenzo Grassi, Poala Inverardi, Gabor Karsai, Jeff Kramer, Marin Litoiu, Antonia Lopes, Jeff Magee, Sam Malek, Serge Mankovskii, Raffaela Mirandola, John Mylopoulos, Oscar Nierstrasz, Mauro Pezzè, Christian Prehofer, Wilhelm Schäfer, Wilhelm Schlichting, Bradley Schmerl, Dennis B. Smith, Joao P. Sousa, Gabriel Tamura, Ladan Tahvildari, Norha M. Villegas, Thomas Vogel, Danny Weyns, Kenny Wong, and Jochen Wuttke

Published in: Dagstuhl Seminar Proceedings, Volume 10431, Software Engineering for Self-Adaptive Systems (2011)

Abstract
The goal of this roadmap paper is to summarize the state of-the-art and identify research challenges when developing, deploying and managing self-adaptive software systems. Instead of dealing with a wide range of topics associated with the field, we focus on four essential topics of self-adaptation: design space for adaptive solutions, processes, from centralized to decentralized control, and practical run-time verification and validation. For each topic, we present an overview, suggest future directions, and focus on selected challenges. This paper complements and extends a previous roadmap on software engineering for self-adaptive systems published in 2009 covering a different set of topics, and reflecting in part on the previous paper. This roadmap is one of the many results of the Dagstuhl Seminar 10431 on Software Engineering for Self-Adaptive Systems, which took place in October 2010.
Cite as

Rogerio de Lemos, Holger Giese, Hausi Müller, Mary Shaw, Jesper Andersson, Luciano Baresi, Basil Becker, Nelly Bencomo, Yuriy Brun, Bojan Cikic, Ron Desmarais, Schahram Dustdar, Gregor Engels, Kurt Geihs, Karl M. Goeschka, Alessandra Gorla, Vincenzo Grassi, Poala Inverardi, Gabor Karsai, Jeff Kramer, Marin Litoiu, Antonia Lopes, Jeff Magee, Sam Malek, Serge Mankovskii, Raffaela Mirandola, John Mylopoulos, Oscar Nierstrasz, Mauro Pezzè, Christian Prehofer, Wilhelm Schäfer, Wilhelm Schlichting, Bradley Schmerl, Dennis B. Smith, Joao P. Sousa, Gabriel Tamura, Ladan Tahvildari, Norha M. Villegas, Thomas Vogel, Danny Weyns, Kenny Wong, and Jochen Wuttke. Software Engineering for Self-Adaptive Systems: A second Research Roadmap. In Software Engineering for Self-Adaptive Systems. Dagstuhl Seminar Proceedings, Volume 10431, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2011)

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@InProceedings{delemos_et_al:DagSemProc.10431.3,
  author =	{de Lemos, Rogerio and Giese, Holger and M\"{u}ller, Hausi and Shaw, Mary and Andersson, Jesper and Baresi, Luciano and Becker, Basil and Bencomo, Nelly and Brun, Yuriy and Cikic, Bojan and Desmarais, Ron and Dustdar, Schahram and Engels, Gregor and Geihs, Kurt and Goeschka, Karl M. and Gorla, Alessandra and Grassi, Vincenzo and Inverardi, Poala and Karsai, Gabor and Kramer, Jeff and Litoiu, Marin and Lopes, Antonia and Magee, Jeff and Malek, Sam and Mankovskii, Serge and Mirandola, Raffaela and Mylopoulos, John and Nierstrasz, Oscar and Pezz\`{e}, Mauro and Prehofer, Christian and Sch\"{a}fer, Wilhelm and Schlichting, Wilhelm and Schmerl, Bradley and Smith, Dennis B. and Sousa, Joao P. and Tamura, Gabriel and Tahvildari, Ladan and Villegas, Norha M. and Vogel, Thomas and Weyns, Danny and Wong, Kenny and Wuttke, Jochen},
  title =	{{Software Engineering for Self-Adaptive Systems:  A second Research Roadmap}},
  booktitle =	{Software Engineering for Self-Adaptive Systems},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2011},
  volume =	{10431},
  editor =	{Rogerio de Lemos and Holger Giese and Hausi M\"{u}ller and Mary Shaw},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/DagSemProc.10431.3},
  URN =		{urn:nbn:de:0030-drops-31561},
  doi =		{10.4230/DagSemProc.10431.3},
  annote =	{Keywords: }
}
Document
DOI: 10.4230/DagSemProc.07081.1
07081 Abstracts Collection --- End-User Software Engineering

Authors: Margaret M. Burnett, Gregor Engels, Brad A. Myers, and Gregg Rothermel

Published in: Dagstuhl Seminar Proceedings, Volume 7081, End-User Software Engineering (2007)

Abstract
From 18.01.07 to 23.02.07, the Dagstuhl Seminar 07081 ``End-User Software Engineering'' was held in the International Conference and Research Center (IBFI), Schloss Dagstuhl. During the seminar, several participants presented their current research, and ongoing work and open problems were discussed. Abstracts of the presentations given during the seminar as well as abstracts of seminar results and ideas are put together in this paper. The first section describes the seminar topics and goals in general. Links to extended abstracts or full papers are provided, if available.
Cite as

Margaret M. Burnett, Gregor Engels, Brad A. Myers, and Gregg Rothermel. 07081 Abstracts Collection --- End-User Software Engineering. In End-User Software Engineering. Dagstuhl Seminar Proceedings, Volume 7081, pp. 1-12, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2007)

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@InProceedings{burnett_et_al:DagSemProc.07081.1,
  author =	{Burnett, Margaret M. and Engels, Gregor and Myers, Brad A. and Rothermel, Gregg},
  title =	{{07081 Abstracts Collection --- End-User Software Engineering}},
  booktitle =	{End-User Software Engineering},
  pages =	{1--12},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2007},
  volume =	{7081},
  editor =	{Margaret H. Burnett and Gregor Engels and Brad A. Myers and Gregg Rothermel},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/DagSemProc.07081.1},
  URN =		{urn:nbn:de:0030-drops-11000},
  doi =		{10.4230/DagSemProc.07081.1},
  annote =	{Keywords: End user software engineering, end-user programming, human-computer interaction, programming language design}
}
Document
DOI: 10.4230/DagSemProc.07081.2
07081 Executive Summary – End-User Software Engineering

Authors: Margaret M. Burnett, Gregor Engels, Brad A. Myers, and Gregg Rothermel

Published in: Dagstuhl Seminar Proceedings, Volume 7081, End-User Software Engineering (2007)

Abstract
From 18.01.07 to 23.02.07, the Dagstuhl Seminar 07081, "End-User Software Engineering'', was held in the International Conference and Research Center (IBFI), Schloss Dagstuhl. During the seminar, several participants presented their current research, and ongoing work and open problems were discussed. This document summarizes the event.
Cite as

Margaret M. Burnett, Gregor Engels, Brad A. Myers, and Gregg Rothermel. 07081 Executive Summary – End-User Software Engineering. In End-User Software Engineering. Dagstuhl Seminar Proceedings, Volume 7081, pp. 1-2, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2007)

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@InProceedings{burnett_et_al:DagSemProc.07081.2,
  author =	{Burnett, Margaret M. and Engels, Gregor and Myers, Brad A. and Rothermel, Gregg},
  title =	{{07081 Executive Summary – End-User Software Engineering}},
  booktitle =	{End-User Software Engineering},
  pages =	{1--2},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2007},
  volume =	{7081},
  editor =	{Margaret H. Burnett and Gregor Engels and Brad A. Myers and Gregg Rothermel},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/DagSemProc.07081.2},
  URN =		{urn:nbn:de:0030-drops-10983},
  doi =		{10.4230/DagSemProc.07081.2},
  annote =	{Keywords: End user software engineering, end-user programming, human-computer interaction, programming language design}
}
Document
DOI: 10.4230/DagSemProc.07081.22
Model-Driven Development for End-Users, too!?

Authors: Gregor Engels

Published in: Dagstuhl Seminar Proceedings, Volume 7081, End-User Software Engineering (2007)

Abstract
Elicitating the requirements and creating a model of a software system are standard activities in the development process of professional software development. The talk discusses whether these two development phases are also present in end-user software development and how they could look like. It is argued that one has to distinguish between at least two types of end-user software developers. Those, who are not professional software developers, but work in an engineering domain and follow stepwise development processes. They are used to have requirements specifications as well as models, too. But, non-professional, non-engineering end-users, e.g. spreadsheet developers, don't and would not like to distinguish between different steps in the development process. Therefore, we propose to hide the distinction between these different steps by closely interconnecting requirements specification, models and code, and by putting them into one development box. By offering appropriate interface functions like create, adapt, refine, etc. to the box, the end-user is supported in developing software without being aware that he is undergoing a stepwise refinement process from requirements specifications towards concrete code.
Cite as

Gregor Engels. Model-Driven Development for End-Users, too!?. In End-User Software Engineering. Dagstuhl Seminar Proceedings, Volume 7081, pp. 1-2, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2007)

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@InProceedings{engels:DagSemProc.07081.22,
  author =	{Engels, Gregor},
  title =	{{Model-Driven Development for End-Users, too!?}},
  booktitle =	{End-User Software Engineering},
  pages =	{1--2},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2007},
  volume =	{7081},
  editor =	{Margaret H. Burnett and Gregor Engels and Brad A. Myers and Gregg Rothermel},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/DagSemProc.07081.22},
  URN =		{urn:nbn:de:0030-drops-10855},
  doi =		{10.4230/DagSemProc.07081.22},
  annote =	{Keywords: End-User Modeling}
}
Document
DOI: 10.4230/DagSemRep.337
Concurrency and Dynamic Behaviour Modelling: Pragmatics & Semantics (Dagstuhl Seminar 02111)

Authors: Gregor Engels, Ursula Goltz, and Rob van Glabeek

Published in: Dagstuhl Seminar Reports. Dagstuhl Seminar Reports, Volume 1 (2021)

Abstract
Cite as

Gregor Engels, Ursula Goltz, and Rob van Glabeek. Concurrency and Dynamic Behaviour Modelling: Pragmatics & Semantics (Dagstuhl Seminar 02111). Dagstuhl Seminar Report 337, pp. 1-28, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2002)

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@TechReport{engels_et_al:DagSemRep.337,
  author =	{Engels, Gregor and Goltz, Ursula and van Glabeek, Rob},
  title =	{{Concurrency and Dynamic Behaviour Modelling: Pragmatics \& Semantics (Dagstuhl Seminar 02111)}},
  pages =	{1--28},
  ISSN =	{1619-0203},
  year =	{2002},
  type = 	{Dagstuhl Seminar Report},
  number =	{337},
  institution =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/DagSemRep.337},
  URN =		{urn:nbn:de:0030-drops-152194},
  doi =		{10.4230/DagSemRep.337},
}
Document
DOI: 10.4230/DagSemRep.288
Semi-Formal and Formal Specification Techniques for Software Systems (Dagstuhl Seminar 00411)

Authors: Hartmut Ehrig, Gregor Engels, Fernando Orejas, and Martin Wirsing

Published in: Dagstuhl Seminar Reports. Dagstuhl Seminar Reports, Volume 1 (2021)

Abstract
Cite as

Hartmut Ehrig, Gregor Engels, Fernando Orejas, and Martin Wirsing. Semi-Formal and Formal Specification Techniques for Software Systems (Dagstuhl Seminar 00411). Dagstuhl Seminar Report 288, pp. 1-36, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2001)

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@TechReport{ehrig_et_al:DagSemRep.288,
  author =	{Ehrig, Hartmut and Engels, Gregor and Orejas, Fernando and Wirsing, Martin},
  title =	{{Semi-Formal and Formal Specification Techniques for Software Systems (Dagstuhl Seminar 00411)}},
  pages =	{1--36},
  ISSN =	{1619-0203},
  year =	{2001},
  type = 	{Dagstuhl Seminar Report},
  number =	{288},
  institution =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/DagSemRep.288},
  URN =		{urn:nbn:de:0030-drops-151724},
  doi =		{10.4230/DagSemRep.288},
}
Document
DOI: 10.4230/DagSemRep.95
Fundamentals of Object-Oriented Languages, Systems, and Methods (Dagstuhl Seminar 9434)

Authors: Hans-Dieter Ehrich, Gregor Engels, Jan Paredaens, and Peter Wegner

Published in: Dagstuhl Seminar Reports. Dagstuhl Seminar Reports, Volume 1 (2021)

Abstract
Cite as

Hans-Dieter Ehrich, Gregor Engels, Jan Paredaens, and Peter Wegner. Fundamentals of Object-Oriented Languages, Systems, and Methods (Dagstuhl Seminar 9434). Dagstuhl Seminar Report 95, pp. 1-47, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (1994)

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@TechReport{ehrich_et_al:DagSemRep.95,
  author =	{Ehrich, Hans-Dieter and Engels, Gregor and Paredaens, Jan and Wegner, Peter},
  title =	{{Fundamentals of Object-Oriented Languages, Systems, and Methods (Dagstuhl Seminar 9434)}},
  pages =	{1--47},
  ISSN =	{1619-0203},
  year =	{1994},
  type = 	{Dagstuhl Seminar Report},
  number =	{95},
  institution =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/DagSemRep.95},
  URN =		{urn:nbn:de:0030-drops-149838},
  doi =		{10.4230/DagSemRep.95},
}
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