Search results for "Hartmut Ehrig"
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Formal Methods in Software and Systems Modeling
By presenting state-of-the-art research results on various aspects of formal and visual modeling of software and systems, this book commemorates the 60th birthday of Hartmut Ehrig.The 24 invited reviewed papers are written by students and collaborators of Hartmut Ehrig who are established researchers in their fields. Reflecting the scientific interest and work of Hartmut Ehrig, the papers fall into three main parts on graph transformation, algebraic specification and logic, and formal and visual modeling.
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Graph Transformation, Specifications, and Nets
This volume pays tribute to the scientific achievements of Hartmut Ehrig, who passed away in March 2016.The contributions represent a selection from a symposium, held in October 2016 at TU Berlin, commemorating Hartmut’ s life and work as well as other invited papers in the areas he was active in. These areas include Graph Transformation, Model Transformation, Concurrency Theory, in particular Petri Nets, Algebraic Specification, and Category Theory in Computer Science.
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Graph and Model Transformation
This book is a comprehensive explanation of graph and model transformation. It contains a detailed introduction, including basic results and applications of the algebraic theory of graph transformations, and references to the historical context. Then in the main part the book contains detailed chapters on M-adhesive categories, M-adhesive transformation systems, and multi-amalgamated transformations, and model transformation based on triple graph grammars. In the final part of the book the authors examine application of the techniques in various domains, including chapters on case studies and tool support. The book will be of interest to researchers and practitioners in the areas of theoretical computer science, software engineering, concurrent and distributed systems, and visual modelling.
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Graph Transformation
This book constitutes the refereed proceedings of the 9th International Conference on Graph Transformation, ICGT 2016, held as part of STAF 2016, in Vienna, Austria, in July 2016. The 14 papers presented in this were carefully reviewed and selected from 33 submissions. They were organized in topical sections named: foundations, tools and algorithms, queries, and applications. The book also contains one keynote paper in full paper length. The book is dedicated to Hartmut Ehrig, one of the fathers and most productive members of the Graph Transformation community, who passed away in 2016. An obituary is included in the front matter of the volume.
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Mathematisch-Strukturelle Grundlagen Der Informatik
In fünf sorgfältig aufeinander abgestimmten Teilen behandelt das Buch die wesentlichen mathematischen Elemente der formalen Spezifikation von Systemen und der Aussagen- und Prädikatenlogik, die für das Verständnis des formalisierten Problemlösens entscheidend und damit für Informatiker unerläßlich sind. Eine Einführung in die intuitive Mengentheorie vermittelt zunächst notwendige mathematische Grundlagen. Motiviert durch das Konzept von Datenstrukturen und abstrakten Datentypen werden dann algebraische Strukturen in der Informatik behandelt. Danach werden Aussagen- und Prädikatenlogik aus der Sicht der Mathematik und Informatik dargestellt. Schließlich führt die Kategorientheorie für Informatiker in die Welt der abstrakten Behandlung mathematischer Strukturen ein.Die Neuauflage wurde erweitert um Darstellungen zur Modellalgebra und zur Implementierung. Übungsaufgaben wurden ergänzt.
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Fundamentals of Algebraic Graph Transformation
This is the first textbook treatment of the algebraic approach to graph transformation, based on algebraic structures and category theory. It contains an introduction to classical graphs. Basic and advanced results are first shown for an abstract form of replacement systems and are then instantiated to several forms of graph and Petri net transformation systems. The book develops typed attributed graph transformation and contains a practical case study.
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Fundamentals of Algebraic Specification 2
Since the early seventies concepts of specification have become central in the whole area of computer science. Especially algebraic specification techniques for abstract data types and software systems have gained considerable importance in recent years. They have not only played a central role in the theory of data type specification, but meanwhile have had a remarkable influence on programming language design, system architectures, arid software tools and environments. The fundamentals of algebraic specification lay a basis for teaching, research, and development in all those fields of computer science where algebraic techniques are the subject or are used with advantage on a conceptual level. Such a basis, however, we do not regard to be a synopsis of all the different approaches and achievements but rather a consistently developed theory. Such a theory should mainly emphasize elaboration of basic concepts from one point of view and, in a rigorous way, reach the state of the art in the field. We understand fundamentals in this context as: 1. Fundamentals in the sense of a carefully motivated introduction to algebraic specification, which is understandable for computer scientists and mathematicians. 2. Fundamentals in the sense of mathematical theories which are the basis for precise definitions, constructions, results, and correctness proofs. 3. Fundamentals in the sense of concepts from computer science, which are introduced on a conceptual level and formalized in mathematical terms.
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Fundamentals of Algebraic Graph Transformation
This is the first textbook treatment of the algebraic approach to graph transformation, based on algebraic structures and category theory. It contains an introduction to classical graphs. Basic and advanced results are first shown for an abstract form of replacement systems and are then instantiated to several forms of graph and Petri net transformation systems. The book develops typed attributed graph transformation and contains a practical case study.
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Recent Trends in Data Type Specification
The algebraic specification of abstract data types is now awell establishedresearch topic in computer science. Thisarea influences both applications and theoreticalfoundations of methodologies which support the design andformal development of reliable software.The Seventh Workshop on Specification of Abstract Data Typestook place in Wusterhausen/Dosse, April17-20, 1990, and wasorganized in cooperation with the ESPRIT Basic ResearchWorking Group COMPASS. The main topics covered by theworkshop were:- Modularization- Object orientation- Higher-order types anddependent types- Inductive completion- Algebraic high-level nets.
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Graph Transformation
This book constitutes the proceedings of the 6th International Conference on Graph Transformations, ICGT 2012, held in Bremen, Germany, in September 2012. The 30 papers and 3 invited papers presented were carefully reviewed and selected from numerous submissions. The papers are organized in topical sections on behavioural analysis, high-level graph transformation, revisited approaches, general transformation models, structuring and verification, graph transformations in use, (meta-)model evolution and incremental approaches.
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Petri Net Technology for Communication-Based Systems
This volume, "Petri Net Technology for Communication-Based Systems," is a state-of-the-artreportin the seriesAdvances in Petri Nets. It showshowvarious well-established and new Petri net notions and techniques can be used for m- elingcommunication-basedsystems,withspecialfocusonwork?owmanagement and business processes. In the last 6 years this topic has been studied by the DFG Forschergruppe Petri Net Technology in Berlin in close cooperation with the international c- munity. The main results of this cooperation were presented at the 1st and 2nd InternationalColloquiaonPetriNetTechnologiesforModelingCommunication- Based Systems, held in Berlin in 1999 and 2001,respectively. A careful selection of contributions by members of the DFG Forschergruppe and by international experts in this ?eld are presented in this volume. Taking into account the fru- ful discussions during the two colloquia and the cross-refereeing process for the accepted papers, a high degree of common understanding was achieved, leading to a highly comprehensive presentation in this volume. The topics of the papers in this volume can be roughly classi?ed into the following two areas: - Petri net technology and - application to communication-based systems.Since most papers comprise aspects of both areas, we chose an alphabetic order. However, in the following we give a rough overview of the contributions in both areas according to the main focus of the corresponding papers.
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Integration of Software Specification Techniques for Applications in Engineering
This volume is a documentation of the main results in the research area "In- gration of Software Speci?cation Techniques for Applications in Engineering". On one hand it is based on the Priority Program "Integration von Techniken der Softwarespezi?kation fur .. ingenieurwissenschaftliche Anwendungen", short Soft- Spez,oftheGermanResearchCouncil(DFG). Ontheotherhanditcontainsnew contributions of international experts in this research area, some of which were presented at the third international workshop INT 2004 on "Integration of Sp- i?cation Techniques for Applications in Engineering". INT 2004 was launched as a satellite event of ETAPS in Barcelona, the "European Joint Conferences on Theory and Practice of Software". The Priority Program SoftSpez was initiated by W. Brauer, M. Broy, H. Ehrig, H. J. Kreowski, H. Reichel, and H. Weber concerning di?erent aspects from computer science, and by E. Schnieder and E. Westk. amper concerning two main application areas in engineering, namely "Tra?c Control Systems" and "Production Automation". After acceptance of SoftSpez by the German Research Council for the period of 1998-2004 a call for speci?c projects within this priority program was launched, where 11 projects from about 75 project proposals were accepted for a period of two years.Since 1998 each year the main research proposals and results of the projects have been presented at an annual colloquium of the priority program, and every two years the projects have been evaluated by an independent group of referees appointed by the G- man Research Council. At this point we would like to thank A.
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Categorical Methods in Computer Science
This volume contains selected papers of the International Workshop on "Categorical Methods in Computer Science - with Aspects from Topology" and of the "6th International Data Type Workshop" held in August/September 1988 in Berlin. The 23 papers of this volume are grouped into three parts: Part 1 includes papers on categorical foundations and fundamental concepts from category theory in computer science. Part 2 presents applications of categorical methods to algebraic specification languages and techniques, data types, data bases, programming, and process specifications. Part 3 comprises papers on categorial aspects from topology which mainly concentrate on special adjoint situations like cartesian closeness, Galois connections, reflections, and coreflections which are of growing interest in categorical topology and computer science.
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Graph-Grammars and Their Application to Computer Science
The generic term "graph-grammars" refers to a variety of methods for specifying (possibly infinite) sets of graphs or sets of maps. The area of graph-grammars originated in the late 60s motivated by considerations concerning pattern recognition - since then the list of areas which have interacted with the development of graph-grammars has grown quite impressively. It includes pattern recognition, software specification and development, VLSI layout schemes, data bases, lambda-calculus, analysis of concurrent systems, massively parallel computer architectures, incremental compilers, computer animation, complexity theory, developmental biology, music composition, representation of physical solids, and many others. This volume is based on the contributions presented at the third international workshop on graph-grammars and their applications, held in Warrenton, Virginia, USA in December 1986. Aiming at the best possible representation of the field not all of the papers presented at the meeting appear in this volume and some of the papers from this volume were not presented at the workshop. The volume consists of two parts: Part I presents tutorial introductions to a number of basic graph and map rewriting mechanisms. Part II contains technical contributions. This collection of papers provides the reader with an up-to-date overview of current trends in graph-grammars.
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Unifying Petri Nets
Since their introduction nearly 40 years ago, research on Petri nets has diverged in many different directions. Various classes of Petri net, motivated either by theory or applications, with its own specific features and methods of analysis, have been proposed and studies in depth.These successful developments have led to a very heterogeneous landscape of diverse models, and this, in turn, has stimulated research on concepts and approaches that contribute to unifying and structuring the diverse landscape. This state-of-the-art survey presents the most relevant approaches to unifying Petri nets in a systematic and coherent way. The 14 chapters written by leading researchers are organized in topical sections on application-oriented approaches, unifying frameworks, and theoretical approaches.
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Graph Transformations
ICGT 2004 was the 2nd International Conference on Graph Transformation, following the ?rst one in Barcelona (2002), and a series of six international workshops on graph grammars with applications in computer science between 1978 and 1998. ICGT 2004 was held in Rome (Italy), Sept. 29-Oct. 1, 2004 under the auspices of the European Association for Theoretical Computer S- ence (EATCS), the European Association of Software Science and Technology (EASST), and the IFIP WG 1.3, Foundations of Systems Speci?cation. The scope of the conference concerned graphical structures of various kinds (like graphs, diagrams, visual sentences and others) that are useful when - scribing complex structures and systems in a direct and intuitive way. These structures are often augmented with formalisms that add to the static descr- tion a further dimension, allowing for the modelling of the evolution of systems via all kinds of transformations of such graphical structures. The ?eld of graph transformation is concerned with the theory, applications, and implementation issues of such formalisms.The theory is strongly related to areas such as graph theory and graph - gorithms, formal language and parsing theory, the theory of concurrent and distributed systems, formal speci?cation and veri?cation, logic, and semantics. The application areas include all those ?elds of computer science, information processing,engineering,andthe naturalsciences wherestatic anddynamicm- elling using graphical structures and graph transformations, respectively, play important roles. In many of these areas tools based on graph transformation technology have been implemented and used.
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Graph Transformations
This book constitutes the refereed proceedings of the 4th International Conference on Graph Transformations, ICGT 2008, held in Leicester, UK, in September 2008. The 27 revised full papers presented together with 5 tutorial and workshop papers and 3 invited lectures were carefully selected from 57 submissions. All current aspects in graph drawing are addressed including hypergraphs and termgraph rewriting, applications of graph transformation, execution of graph transformations, compositional systems, validation and verification, graph languages and special transformation concepts, as well as patterns and model transformations. In addition the volume contains 17 short papers of the ICGT 2008 Doctoral Symposium.
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Geschlechtsspezifisches Dialogverhalten in den Artusepen Hartmanns von Aue?
Der Band geht der Frage nach, inwiefern in den Artusepen Hartmanns von Aue geschlechtsspezifisches Dialogverhalten realisiert ist. Das eigens entwickelte dialoganalytische Modell adaptiert und verknüpft Illokutionslogik, Sprechaktsequenzanalyse, Dialogtypologie, Dialogmusterbeschreibung sowie kommunikativ-pragmatisches Kategorieninventar. Es zeigt sich, dass geschlechtsspezifisch markierte Illokutionen innerhalb des 'Erec' und des 'Iwein' die Ausnahme bilden, während der Handlungsverlauf sowie die Charakterisierung, die Motive und die Beziehungen der Figuren größeren Einfluss auf die Auswahl und Ausgestaltung der jeweiligen Illokutionskraft nehmen. Die durch die 'unmittelbar' lehrhafte Literatur definierten Sprachhandlungsnormen, welche in Auswahl systematisiert werden, können innerhalb der fiktionalen Literatur folglich überschritten werden, wobei auch die Verschiebung von gender-Grenzen möglich wird. Eine Sonderrolle nehmen 'versprechen', 'schwören' und 'einen Eid ablegen' in jenen Situationen des 'Iwein' ein, in denen ihnen rechts- und stabilitätssichernde Funktion zukommt, was die Relevanz der Einhaltung jener teilweise (proto-)rechtlichen Charakter tragenden Sprechakte vor Augen führt.
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Problematik von Schuld und Läuterung in der Epik Hartmanns von Aue
Alle Protagonisten Hartmanns von Aue - Erec, Gregorius, Heinrich und Iwein - ereilt in seiner Epik ein ähnliches Schicksal. Auf dem (vorläufigen) Höhepunkt ihres Ruhms angekommen, verstricken sie sich in Schuld und müssen auf einem Weg der Läuterung ihrer Verfehlung Rechnung tragen. Die Arbeit versucht die Elemente der Schuld und Läuterung der vier hartmannschen Protagonisten herauszustellen und sie danach auf Gemeinsamkeiten und Unterschiede hin zu untersuchen. Abschließend soll ein Abgleich mit der theologischen Lehre und anderen geistigen Strömungen in der höfischen Blütezeit erfolgen, um den geistigen Standort Hartmanns aufzuzeigen.
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"Erec" Hartmanns von Aue
Hartmann von Aue war der erste deutsche Dichter, der in seinem Versroman „Erec“ von König Artus und der Tafelrunde erzählt hat. Die Einführung gibt zunächst eine ausführliche Inhaltsanalyse, in der auf Eigenheiten der Figurendarstellung, der Erzählhaltung und des Verhältnisses zu der französischen Vorlage eingegangen wird. Weitere Kapitel behandeln den Überlieferungsbefund, die Bauform und die Poetik des Romans, den Erzählstil, Stoff und Quellen sowie die Wirkungsgeschichte. Anliegen der Darstellung ist es, den Stand der Forschung sichtbar zu machen und zugleich durch neue Fragen zur Beschäftigung mit dem Text anzuregen.
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Theory and Application of Graph Transformations
Theareaofgraphtransformationoriginatedinthelate1960sunderthename “graph grammars” – the main motivation came from practical considerations concerning pattern recognition and compiler construction. Since then, the list of areas which have interacted with the development of graph transformation has grown impressively. The areas include: software speci?cation and development, VLSI layout schemes, database design, modeling of concurrent systems, m- sively parallel computer architectures, logic programming, computer animation, developmentalbiology,musiccomposition,distributedsystems,speci?cationl- guages, software and web engineering, and visual languages. As a matter of fact, graph transformation is now accepted as a fundamental computation paradigm where computation includes speci?cation, programming, and implementation. Over the last three decades the area of graph transfor- tion has developed at a steady pace into a theoretically attractive research ?eld, important for applications. Thisvolume consistsofpapersselectedfromcontributionsto the Sixth Int- national Workshop on Theory and Applications of Graph Transformation that took place in Paderborn, Germany, November 16-20, 1998. The papers und- went an additional refereeing process which yielded 33 papers presented here (out of 55 papers presented at the workshop). This collection of papers provides a very broad snapshot of the state of the art of the whole ?eld today. They are grouped into nine sections representing most active research areas. Theworkshopwasthe sixth in a seriesof internationalworkshopswhich take place every four years. Previous workshops were called “Graph Grammars and Their Application to Computer Science”. The new name of the Sixth Workshop re?ectsmoreaccuratelythecurrentsituation,whereboththeoryandapplication play an equally central role.
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Graph Grammars and Their Application to Computer Science
This volume contains papers selected from the contributionsto the 4th International Workshop on Graph Grammars andTheir Application to Computer Science. It is intended toprovide a rich source of information on the stateof the artand newest trends to researchers active in the area and forscientists who would like to know more about graph grammars.The topics of the papers range from foundations throughalgorithmic and implemental aspects to various issues thatarise in application areas like concurrent computing,functional and logic programming, software engineering,computer graphics, artificial intelligence and biology. Thecontributing authors are F.-J. Brandenburg, H. Bunke, T.C.Chen, M. Chytil, B. Courcelle, J. Engelfriet, H. G|ttler, A.Habel, D. Janssens, C. Lautemann, B. Mayoh, U. Montanari,M. Nagl, F. Parisi-Presicci, A. Paz, P. Prusinkiewics, M.R.Sleep, A. Rosenfeld, J. Winkowski and others.
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Graph Transformations
Graphs are among the simplest and most universal models for a variety of s- tems, not just in computer science, but throughout engineering and the life sciences. When systems evolve we are interested in the way they change, to p- dict, support, or react to their evolution. Graph transformation combines the idea of graphs as a universal modelling paradigm with a rule-based approach to specify their evolution. The area is concerned with both the theory of graph transformation and their application to a variety of domains. The biannual International Conferences on Graph Transformation aim at bringingtogetherresearchersandpractitionersinterestedin the foundations and applicationsof graphtransformation.The ?fth conference,ICGT 2010,was held at the University of Twente (The Netherlands) in September/October 2010, alongwith severalsatellite events.It continuedthe line ofconferences previously held in Barcelona (Spain) in 2002, Rome (Italy) 2004, Natal (Brazil) in 2006 and Leicester (UK) in 2008, as well as a series of six International Workshops on Graph Transformation with Applications in Computer Science from 1978 to 1998. Also, ICGT alternates with the workshop series on Application of Graph Transformation with Industrial Relevance (AGTIVE). The conference was held under the auspices of EATCS and EASST.
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Mythos, Religion, Ideologie
Dieser Essay-Band analysiert und kommentiert variierende Problemstellungen in der westlichen Zivilisation, die auf mythische, religiöse und/oder ideologische Grundmuster im Denken und Handeln der Menschen zurückzuführen sind. Bei Anwendung einer psychohistorischen Methode der Analyse und Kritik lassen sich Konstellationen in Kultur, Gesellschaft und Politik aufdecken, deren tiefenstrukturelle Merkmale bereits vor Jahrhunderten, wenn nicht Jahrtausenden, angelegt wurden. Sie stellen schwer abzutragende Hypotheken dar und belasten das aufgeklärte Denken. Ressentiments, Rivalitäten, Konflikte und Kriege entwickeln sich selten spontan an der Oberfläche der Gesellschaftsgeschichte, sondern sind in den meisten Fällen vorgeprägt und zum Teil uralt. Sie zu erkennen und zu entlarven ist eine vorrangige Aufgabe der Kulturkritik.
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