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19th International Symposium on software Reliability engineering, ISSRE 2008

作者： Kläs, Michael Nakao, Haruka Elberzhager, Frank Münch, Jürgen Fraunhofer Institute for Experimental Software Engineering Germany Safety and Product Assurance Dept. Japan Manned Space Systems Corporation Japan

ISBN: (纸本)9780769534053

Planning quality assurance (QA) activities in a systematic way and controlling their execution are challenging tasks for companies that develop software or software-intensive systems. Both require estimation capabilities regarding the effectiveness of the applied QA techniques and the defect content of the checked artifacts. Existing approaches for these purposes need extensive measurement data from historical projects. Due to the fact that many companies do not collect enough data for applying these approaches (especially for the early project lifecycle), they typically base their QA planning and controlling solely on expert opinion. This article presents a hybrid method that combines commonly available measurement data and context-specific expert knowledge. To evaluate the method's applicability and usefulness, we conducted a case study in the context of independent verification and validation activities for critical software in the space domain. A hybrid defect content and effectiveness model was developed for the software requirements analysis phase and evaluated with available legacy data. One major result is that the hybrid model provides improved estimation accuracy when compared to applicable models based solely on data. The mean magnitude of relative error (MMRE) determined by crossvalidation is 29.6% compared to 76.5% obtained by the most accurate data-based model. © 2008 IEEE.

关键词： Quality assurance

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Predicting Defect Content and Quality Assurance Effectiveness by Combining Expert Judgment and Defect Data - A Case Study

Predicting Defect Content and Quality Assurance Effectivenes...

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International Symposium on software Reliability engineering (ISSRE)

作者： Michael Kläs Haruka Nakao Frank Elberzhager Jürgen Münch Fraunhofer Institute of Experimental Software Engineering (IESE) Germany Safety & Product Assurance Department Japan Manned Space Systems Corporation Japan

Planning quality assurance (QA) activities in a systematic way and controlling their execution are challenging tasks for companies that develop software or software-intensive systems. Both require estimation capabilities regarding the effectiveness of the applied QA techniques and the defect content of the checked artifacts. Existing approaches for these purposes need extensive measurement data from his-torical projects. Due to the fact that many companies do not collect enough data for applying these approaches (es-pecially for the early project lifecycle), they typically base their QA planning and controlling solely on expert opinion. This article presents a hybrid method that combines commonly available measurement data and context-specific expert knowledge. To evaluate the methodpsilas applicability and usefulness, we conducted a case study in the context of independent verification and validation activities for critical software in the space domain. A hybrid defect content and effectiveness model was developed for the software requirements analysis phase and evaluated with available legacy data. One major result is that the hybrid model provides improved estimation accuracy when compared to applicable models based solely on data. The mean magni-tude of relative error (MMRE) determined by cross-validation is 29.6% compared to 76.5% obtained by the most accurate data-based model.

关键词： Quality assurance software quality software engineering software reliability Data engineering Reliability engineering Product safety software safety Control systems software systems

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Modelling automated service orchestration for IT-based homeservices

Modelling automated service orchestration for IT-based homes...

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IEEE International Conference on Service Operations and Logistics, and Informatics, SOLI

作者： Jochen Meis Jorg Draeger Fraunhofer Institute of Software and Systems Engineering (ISST) Dortmund Germany

The main focus for housing industries is to ensure their asset of tenants. The economic process is a result of the demographical factor - population declines and the averaged age of people rises in the industrial countries. The consequence of the demographic factor is that housing industries become more and more competitors in a limited market. One option for housing industries is to offer specific, flexible and individual IT-based homeservices to tenants. Homeservices are assigned to health care, comfort and entertainment, security and facility management. The fact: people living in smart home environments open a new option for service providers. Their services will be integrated together into a huge service portal, designed regionally. A service platform offers various services and orchestrates them individually for every customer. In this szenario the customers are tenants from housing industry. The service platform considers of customers individual requirements and has got meta-information about the catalogue of IT-based homeservices, profiles of tenants and the service providers. Because of the defined service and provider parameters - like region, time and specialization - the service platform is in a position to orchestrate and manage various offered homeservices. Basic requirements, providing IT-based home-services, are a specific hardware, software and network infrastructure. These infrastructures are used to deliver basic information to the service platform. The service platform is flexible, scalable, configurable and personalised. Moreover the use and control has to be possible with mobile devices.

关键词： Smart homes Security Home automation software systems systems engineering and theory Medical services Automatic control Application software Microelectronics Computer industry

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A Middleware Supporting Context-Aware Services Based on Context Business Objects

A Middleware Supporting Context-Aware Services Based on Cont...

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International Conference on Grid and Cooperative Computing (GCC)

作者： Jinhua Xiong Manfred Wojciechowski Academy of Sciences Graduate School Chinese Fraunhofer Institute for Software-and Systems Engineering Germany

Although the demand for context-aware applications seems very high, not many applications are in real use. Besides the strenuosity, their insufficient adaptability to changing environment is a major reason. To address the issue, we proposed a VINCA-cc approach and a context middleware to support business-level dynamic configuration of context-aware service. In our approach, all kinds of context information are abstracted to standardized context business objects (CBO), registered in the context middleware. The business-level context model, CBO, represents a set of business-level properties and abstract unified operations that are applicable to all context information. Based on the visual business-level service composition language-VINCA and CBO model, context-aware services can be visually (re-)configured at the business-level. The paper focuses on the context middleware, CBO model and its application.

关键词： Context-aware services Middleware Application software Context modeling systems engineering and theory software engineering Ubiquitous computing Computer industry Mobile handsets Pervasive computing

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SHAPES - A scalable parallel HW/SW architecture applied to wave field synthesis

Proceedings of the AES International Conference

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Proceedings of the AES International Conference 2007年

作者： Sporer, Thomas Beckinger, Michael Franck, Andreas Bacivarov, Iuliana Wolfgang, Haid Kai, Huang Thiele, Lothar Paolucci, Pier S. Bazzana, Piergiovanni Vicini, Piero Jianjiang, Ceng Kraemer, Stefan Leupers, Rainer Fraunhofer Institut fuer Digitale Medientechnologie Ilmenau 98693 Germany Swiss Federal Institute of Technology Zurich Computer Engineering and Networks Laboratory Zurich CH-8092 Switzerland ATMEL Roma Roma Italy INFN Dip. Fisica Univ. Roma La Sapienza Roma 00185 Italy Institute for Software for Systems on Silicon RWTH Aachen University Aachen 52056 Germany

The usage of advanced audio processing algorithms in products has always been limited by the available processing power. For powerful concepts like the wave field synthesis (WFS) the performance is limited by the execution speed. In the past it was possible to increase the performance of digital signal processors by increasing the clock rate. The next generation will be highly parallel heterogeneous multi-processor systems. This paper presents a now parallel processor architecture and the first stops towards an adequate optimization of WFS. A software development environment which assists in creating scalable programs for highly parallel hardware will be further explained. An enhanced WFS convolution structure is presented which use position dependent filtering and improve the interpolation necessary for moving sound sources.

关键词： Digital signal processors

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Towards ontology-based requirements management in automotive electronics

Towards ontology-based requirements management in automotive...

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作者： Sandkuhl, Kurt Billig, Andreas School of Engineering Jönköping University Sweden Fraunhofer-Institute for Software and Systems Engineering ISST Berlin Germany

ISBN: (纸本)9783902661043

The paper presents work in progress in integrated management of artifacts in automotive electronics with focus on requirements. A case study on industrial requirements management was performed in a Swedish automotive supplier of software-intensive systems. Based on this case study, a frame concept for integrated model management is proposed. One core element in implementing this frame concept is an ontology-based domain repository. Concepts, architecture and realization of a domain-repository are introduced. The domain repository is based on RDF, RDFS and TRIPLE and includes extensions supporting navigation in the artifact net and derivation of new knowledge: Modlets, Actlets and Spot Views. Copyright © 2006 IFAC.

关键词： Ontology

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Implementing the pragmatic web: Practical approaches 1

Implementing the pragmatic web: Practical approaches

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1st International Conference on the Pragmatic Web, PragWeb 2006

作者： Kamphusmann, Thomas Fraunhofer–Institute for Systems– and Software Engineering Dortmund Germany

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TOWARDS ONTOLOGY-BASED REQUIREMENTS MANAGEMENT IN AUTOMOTIVE ELECTRONICS

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IFAC Proceedings Volumes 2006年第3期39卷 715-720页

作者： Kurt Sandkuhl Andreas Billig School of Engineering at Jönköping University Sweden Fraunhofer-Institute for Software and Systems Engineering ISST Berlin Germany

关键词： information modelling requirements analysis software tool

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Smart food: Mobile guidance for food-allergic people

Smart food: Mobile guidance for food-allergic people

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7th IEEE International Conference on E-Commerce Technology/1st IEEE International Workshop on Service Oriented Solutions for Cooperative Organizations/IEEE International Workshop on Business Transformation

作者： Gassner, K Vollmer, G Prehn, M Fiedler, M Ssmoller, S Fraunhofer Institute for Software and Systems Engineering (ISST) Germany

ISBN: (纸本)0769522777

Food-allergic people need comprehensible, complete, reliable, and personalized information about food products. Today, such integrated information is not available mainly because of different interests of the stakeholders in the food value chain. Within this paper we introduce an approach to providing mobile assistance for product-specific on-site advice in a supermarket. A revenue-model is discussed and finally a prototype is introduced.

关键词： Food products

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Service roaming in mobile applications

Service roaming in mobile applications

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IEEE International Conference on Services Computing

作者： Gartmann, R Holtkamp, B Weissenberg, N Li, G Fraunhofer Institute for Software and Systems Engineering (ISST) Germany Institute of Computing Technology (ICT) China

ISBN: (纸本)0769524087

The evolution of wireless network technology has led to an increasing number of applications for mobile use. In addition, the paradigm of service-oriented architectures allows a composition of applications based on distributed web services. By using registries it becomes possible to choose the appropriate services at runtime. It needs to be considered that services for mobile use may have different scopes. For instance, routing or weather services may be dedicated to a specific region so that they may be useless if a user's area of interest does not match the service's scope. It is hence necessary to identify and use those services with a scope that corresponds to the relevant context such as a user's location. Moreover, if the context changes, it is desirable to automatically switch between different equivalent service instances to provide a user with a continuous connection to a desired service. We denote this mechanism as service roaming. This paper presents the major concepts needed for service roaming as well as a roaming model based on n-dimensional context spaces.

关键词： Mobile telecommunication systems

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