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IEEE Annual Computer Software and Applications Conference Workshops (COMPSACW)

作者： Tiziana Margaria Barry D. Floyd Bernhard Steffen Chair Service and Software Engineering Universität Potsdam Germany Orfalea College of Business California Polytechnic State University San Luis Obispo CA USA Chair of Programming Systems TU Dortmund University Germany

The central challenge in resource constrained systems is indeed that there is often a dramatic problem of resources: little memory, no display (i.e., mediated control and interaction), and weak processors. These constraints are due to various reasons, including cost (in economies of scale little amounts can make a big difference) and constraints mandated by the host environment such as limitations on weight, size, bandwidth, or power consumption. In addition to structural issues, that already force designers to stretch and squeeze pushing the design to the limit, other problems may affect the design process itself, e.g. when developers must program for a system that is itself still under design: such concurrent development includes easily critical unknown unknowns. Design efforts under these conditions are difficult at best, and it is not clear how much of these constraints and pressures are really unavoidable. We believe that a perspective of designing for simplicity would frame the situation in a more favorable way, leading to systems that better use available resources, are more robust, and easier to maintain and use. In the course of the ITSy project, we interviewed IT experts and industry practitioners about their perspectives on simplicity principles within their research and practice, collecting insights and anecdotal evidence on some phenomena, as well as suggestions for possible principles. In this paper, we apply initial results from this empirical understanding of simplicity to the domain of resource constrained system design. We identify some recurring themes from the outcome of the interviews, and match these understandings for one specific embedded system case study.

关键词： Mathematical model Embedded systems Unified modeling language Complexity theory Testing Educational institutions

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Extracting Component-Oriented Behaviour for Self-Healing Enabling

Extracting Component-Oriented Behaviour for Self-Healing Ena...

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IEEE Workshop on Engineering of Autonomic and Autonomous systems (EASE)

作者： Marco Bakera Christian Wagner Tiziana Margaria Emil Vassev Mike Hinchey Bernhard Steffen Chair Service and Software Engineering Universitat Potsdam Potsdam Germany University College Dublin Ireland University of Limerick Ireland Chair Programming Systems Technische Universität Dortmund Dortmund Germany

Rich and multifaceted domain specific specification languages like the Autonomic System Specification Language (ASSL) help to design reliable systems with self-healing capabilities. The GEAR game-based Model Checker has been used successfully to investigate in depth properties of the ESA ExoMars Rover. We show here how to enable GEAR's game-based verification techniques for ASSL via systematic model extraction from a behavioral subset of the language, and illustrate it on a description of the Voyager II space mission. This way, we close the gap between the design-time and the run-time techniques provided in the SHADOWS platform for self-healing of concurrency, performance, and functional issues.

关键词： Gears Specification languages Runtime Concurrent computing Software systems Aerospace industry Aerospace electronics Conferences Design engineering Software engineering

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Dynamic testing via automata learning

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International Journal on Software Tools for Technology Transfer 2009年第4期11卷 307-324页

作者： Raffelt, Harald Merten, Maik Steffen, Bernhard Margaria, Tiziana TU Dortmund Chair of Programming Systems University of Dortmund Dortmund Germany Chair of Service and Software Engineering Universität Potsdam Potsdam Germany

This paper presents dynamic testing, a method that exploits automata learning to systematically test (black box) systems almost without prerequisites. Based on interface descriptions and optional sample test cases, our method successively explores the system under test (SUT), in order to extrapolate a behavioural model. This is in turn used to steer the further exploration process. Due to the applied learning technique, our method is optimal in the sense that the extrapolated models are most concise (i.e. state minimal) in consistently representing all the information gathered during the exploration. Using the LearnLib, our framework for automata learning, our method can be elegantly combined with numerous optimisations of the learning procedure, with various choices of model structures, and with the option of dynamically/interactively enlarging the alphabet underlying the learning process. The latter is important in the Web context, where totally new situations may arise when following links. All these features are illustrated using as a case study the web application Mantis, a bug tracking system widely used in practice. In addition, we present another case study that demonstrates the scalability of the approach. We show how the dynamic testing procedure works and how behavioural models arise that concisely summarize the current testing effort. It turns out that these models reveal the system structure from a user perspective. Besides steering the automatic exploration process, they are ideal for user guidance and to support analyses to improve the system understanding, as they reveal the system structure from a user perspective.

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LTL Guided Planning: Revisiting Automatic Tool Composition in ETI

LTL Guided Planning: Revisiting Automatic Tool Composition i...

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Annual IEEE/ NASA Goddard Workshop on Software Engineering

作者： Tiziana Margaria Bernhard Steffen Chair of Service and Software Engineering University of Potsdam Potsdam Germany Chair of Programming Systems University of Dortmund Dortmund Germany

We revisit the automatic tool composition feature of the electronic tool integration platform under the perspective of planning. It turns out that in todays terminology, ETIs temporal logic-based synthesis of tool sequences is a form of planning-based automated orchestration. In contrast to Al-based planning approaches, our synthesis approach is not restricted to compute one solution, but it may compute all (shortest/minimal) solutions, with the intent to provide maximum insight into the potential design space.

关键词： Terminology Specification languages Software engineering Automatic programming Prototypes Animation Ontologies Taxonomy Hypertext systems Search engines

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An Approach to Discovery with miAamics and jABC

An Approach to Discovery with miAamics and jABC

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Web Intelligence and Intelligent Agent Technology Workshops (WI-IAT)

作者： Christian Kubczak Tiziana Margaria Christian Winkler Bernhard Steffen Chair of Software Engineering Universität Dortmund Germany Chair of Service and Software Engineering Universität Postdam Germany Chair of Programming Systems Universität Dortmund Germany

We address the discovery scenario using miAamics, a framework for rule-based evaluation originally developed for efficient and scalable personalization purposes, as a reasoning engine. The discovery service is impleme... 详细信息

关键词： Software engineering Engines Ontologies Taxonomy Packaging Databases Intelligent agent Context awareness Concrete Conferences

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Continuous engineering of embedded systems 1

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5th IFIP TC 10 Working Conference on Distributed and Parallel Embedded systems, DIPES 2006

作者： Steffen, Bernhard Margaria, Tiziana Chair of Programming Systems Universität Dortmund Germany Chair of Service and Software Engineering Universität Potsdam Germany

ISBN: (数字)9780387393629

ISBN: (纸本)9780387393612

We investigate the late phases of the embedded systems’ life cycles, in particular the treatment of change requests, the integration of legacy components, and the problem of emerging platforms. We propose to tackle these issues in a model-driven design paradigm, on the behavioral models, and to employ techniques from automata theory, model checking and automata learning. The main practical impact of our approach is its support of the systematic completion and update of user/customer requirements, which by their nature are quite partial and concentrate on the most prominent scenarios. Our technique generalizes these typical requirement skeletons by extrapolation and it indicates via automatically generated traces where the requirement specification is too loose and additional information is required. This works in the initial phases of system development, but also in case of change requests, where our technique hints at possible problems with their realization (feature interactions), and helps to keep the requirement model in synchrony along the chain of new releases. © 2006 by International Federation for Information Processing.

关键词： Embedded systems

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A Web-Based Runtime-Reconfigurable Role Management Service

A Web-Based Runtime-Reconfigurable Role Management Service

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International Workshop on Automated Specification and Verification of Web systems, WWV

作者： Martin Karusseit Tiziana Margaria Chair of Programming Systems Universität Dortmund Germany Chair of Service and Software Engineering Universität Postdam Germany

Today Web-based applications are very complex and provide several hundred users with access to sensible data. Adequate access control mechanisms that prevent unauthorized access and gives policy-compliant access to users depending on their status are thus central. The online conference service (OCS) is a system of services which collectively provide all necessary workflows and functionalities an online decision support service needs. Here we describe its flexible role-based access control mechanism and introduce the embedded role management service, which is extensible, modifiable and reconfigurable online, during the service operations. We also discuss a first version of the personalized role management service as used in the OJS, the journal member of the product line initiated by the OCS

关键词： Conference management Access control Logic design Collaboration Switches Engineering management Software engineering Application software Computer science Control system synthesis

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Model-based design of distributed collaborative bioinformatics processes in the jABC

Model-based design of distributed collaborative bioinformati...

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IEEE International Conference on Engineering of Complex Computer systems

作者： T. Margaria C. Kubczak M. Njoku B. Steffen Chair Servce and Software Engineering University of Potsdam Potsdam Germany Chair of Programming Systems University of Dortmund Dortmund Germany Chair of Service Engineering for Distributed Systems University of Göttingen Gottingen Germany

Our approach to the model-driven collaborative design of workflows for bioinformatic applications uses the jABC for model driven mediation and choreography to complement a Web service-based elementary service provision. jABC is a framework for service development based on lightweight process coordination. Users (product developers and system/software designers) develop services and applications by composing reusable building-blocks into (flow-)graph structures that can be animated, analyzed, simulated, verified, executed, and compiled. This way of handling the collaborative design of complex processes has proven to be effective and adequate for the cooperation of non-programmers (in this case biologists) and technical people, and it is now being rolled out in the operative practice

关键词： Collaboration Bioinformatics Collaborative work Application software Mediation Software reusability Software systems Software design Animation Biological system modeling

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Biological LC/MS Preprocessing and Analysis with jABC, jETI and xcms

Biological LC/MS Preprocessing and Analysis with jABC, jETI ...

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International Symposium on Leveraging Applications of Formal Methods, Verification and Validation ( ISoLA)

作者： Christian Kubczak Tiziana Margaria Arno Fritsch Bernhard Steffen Chair of Software Engineering University of Dortmund Germany Chair of Service and Software Engineering University of Potsdam Germany Chair of Mathematical Statistics and Biometric Applications University of Dortmund Germany Chair of Programming Systems University of Dortmund Germany

LC/MS is a successful analysis technique for the statistical analysis used in several branches of biology. It requires an intense screening and combination of the raw data, which is usually done with programs and libraries invoked by scripts in the domain-specific statistics language S or R. We show here how to model and implement this complex workflow in a service-oriented fashion, using the jABC service definition environment and jETI for remote service integration and execution.

关键词： Statistical analysis Biological system modeling Proteins Mice Mass spectroscopy Proteomics Application software Software engineering Performance analysis Biometrics

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The FMICS-jETI Platform: Status and Perspectives

The FMICS-jETI Platform: Status and Perspectives

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International Symposium on Leveraging Applications of Formal Methods, Verification and Validation ( ISoLA)

作者： Tiziana Margaria Christian Kubczak Bernhard Steffen Stefan Naujokat Chair of Service and Software Engineering Universität Postdam Potsdam Germany Chair of Software Engineering Universität Dortmund Dortmund Germany Chair of Programming Systems Universität Dortmund Dortmund Germany

One of the goals of FMICS, the ERCIM Working Group on Formal Methods for Industrial Critical systems (FMICS) [8], is to transfer and promote the use formal methods technology in industry. The ongoing Verified Software Repository Grand Challenge [11] offers a great opportunity to reach this goal, resulting in a more robust and solid software industry in Europe. We demonstrate here the current status of the FMICS-jETIplatform1, a collaborative demonstrator based on the jETI technology2, that provides as repository a collection of verification tools stemming from the activities of the FMICS working group and facilities to orchestrate them in a remote and simple way. At the same time FMICS-jETI itself is a contribution to the VSR repository and thus to the Grand Challenge.

关键词： Software tools Application software Computer industry Testing Software engineering Collaborative tools Collaborative software Robustness Solids Europe

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