The Experts below are selected from a list of 168 Experts worldwide ranked by ideXlab platform
Klaus Kronlof - One of the best experts on this subject based on the ideXlab platform.
-
UML 2.0 profile for embedded system design
Design Automation and Test in Europe, 2005Co-Authors: Petri Kukkala, Jouni Riihimaki, Marko Hannikainen, Timo D. Hamalainen, Klaus KronlofAbstract:The unified modeling language (UML) 2.0 is emerging in the area of embedded system design. This paper presents a new UML 2.0 profile - called TUT-profile - that introduces a set of stereotypes and design rules for an application, platform, and mapping. The profile classifies different application and platform Components, and enables their parameterization. The TUT-profile concentrates on the structure of an application and platform, and utilizes standard UML 2.0 for the behavioral modeling. The application is seen as a set of active classes with an internal behavior. Correspondingly, the platform is seen as a Component Library with a parameterized presentation in UML 2.0 for each Library Component.
-
UML 2.0 Profile for Embedded System Design
2005Co-Authors: Petri Kukkala, Jouni Riihimaki, Marko Hannikainen, Timo D. Hamalainen, Klaus KronlofAbstract:Unified Modeling Language (UML) 2.0 is emerging in the area of embedded system design. This paper presents a new UML 2.0 profile - called TUT-Profile - that introduces a set of stereotypes and design rules for an application, platform, and mapping. The profile classifies different application and platform Components, and enables their parameterization. TUT-Profile concentrates on the structure of an application and platform, and utilizes standard UML 2.0 for the behavioral modeling. The application is seen as a set of active classes with an internal behavior. Correspondingly, the platform is seen as a Component Library with a parameterized presentation in UML 2.0 for each Library Component.
-
DATE - UML 2.0 Profile for Embedded System Design
Design Automation and Test in Europe, 2005Co-Authors: Petri Kukkala, Jouni Riihimaki, Marko Hannikainen, Timo Hämäläinen, Klaus KronlofAbstract:The unified modeling language (UML) 2.0 is emerging in the area of embedded system design. This paper presents a new UML 2.0 profile - called TUT-profile - that introduces a set of stereotypes and design rules for an application, platform, and mapping. The profile classifies different application and platform Components, and enables their parameterization. The TUT-profile concentrates on the structure of an application and platform, and utilizes standard UML 2.0 for the behavioral modeling. The application is seen as a set of active classes with an internal behavior. Correspondingly, the platform is seen as a Component Library with a parameterized presentation in UML 2.0 for each Library Component.
Mickaël Raulet - One of the best experts on this subject based on the ideXlab platform.
-
LLVM-based and scalable MPEG-RVC decoder
Journal of Real-Time Image Processing, 2011Co-Authors: Jérôme Gorin, Matthieu Wipliez, Françoise Préteux, Mickaël RauletAbstract:MPEG reconfigurable video coding (RVC) is a new platform-independent specification methodology chosen by the MPEG community for describing coding standards. This methodology aims at producing abstract decoder models (ADMs) of MPEG decoders as programs described in a dataflow language namely "RVC-CAL Actor Language" (RVC-CAL). RVC-CAL naturally expresses potential parallelism between tasks of an application, which makes an ADM description suitable for implementation to a wide variety of platforms, from uniprocessor systems to FPGAs. MPEG RVC eases the development process of decoders by building decoders at a Library-Component level instead of using monolithic algorithms, and by providing a Library of coding tools standardized in MPEG. This paper presents new mechanisms based on the low level virtual machine that allow the conception of a decoder able to dynamically instantiate several RVC decoder descriptions. This decoder, unlike static decoders generated by RVC tools, keeps de facto the features of an RVC description namely portability, scalability and reconfigurability.
-
An LLVM-based decoder for MPEG Reconfigurable Video Coding
2010Co-Authors: Jérôme Gorin, Matthieu Wipliez, Jonathan Piat, Françoise Préteux, Mickaël RauletAbstract:MPEG Reconfigurable Video Coding(RVC) is a new platform-independent specification methodology chosen by the MPEG community for describing coding standards. This methodology aims at producing Abstract Decoder Models (ADMs) of MPEG decoders as dataflow programs described in RVC-CAL Actor Language (RVC-CAL). RVC-CAL naturally expresses potential parallelism between tasks of an application, which makes an ADM description suitable for implementation to a wide variety of platform, from uniprocessor systems to FPGAs. MPEG RVC eases the conception process of decoders by describing decoders at a Library Component level instead of using monilithic algorithms, and by providing a Library of coding tools standardized in MPEG. This paper presents new mechanisms based on the Low Level Virtual Machine (LLVM) capacities that allow the conception of the first decoder able to dynamically instantiate an RVC decoder description. This decoder, unlike static decoders generated by RVC tools, keeps de facto the features of an RVC description namely portability, scalability and reconfiguration ability.
-
Validation of bitstream syntax and synthesis of parsers in the MPEG Reconfigurable Video Coding framework
2008 IEEE Workshop on Signal Processing Systems, 2008Co-Authors: Mickaël Raulet, Jonathan Piat, Christophe Lucarz, Marco MattavelliAbstract:Video coding technology has evolved in the past years into a variety of different and complex algorithms. So far the specification of such standard algorithms has been done case by case providing monolithic textual and reference SW specifications, but without any attention on commonalities and the possibility of incremental improvements or modifications of such monolithic standards. The MPEG Reconfigurable Video Coding (RVC) framework is a new ISO standard, currently under development aiming at providing video codec specifications at the level of Library functions instead of monolithic algorithms. The possibility to select a subset of standard coding algorithms to specify a decoder that satisfies application specific constraints is very attractive. However, such possibility to reconfigure codecs requires systematic procedures and tools capable of describing the new bitstream syntaxes of such new codecs. Moreover, it is also necessary to generate the associated parsers which are capable to parse the new bitstreams because they are not available ldquoa priorirdquo in the RVC Library. This paper further explains the problem and describes the technologies used to describe new bitstream syntaxes within RVC. In addition, the paper describes the methodology and the tools for the validation of bitstream syntaxes descriptions as well as an example of systematic procedures for the direct synthesis of parsers in the same data flow formalism in which the RVC Library Component are implemented.
Petri Kukkala - One of the best experts on this subject based on the ideXlab platform.
-
UML 2.0 profile for embedded system design
Design Automation and Test in Europe, 2005Co-Authors: Petri Kukkala, Jouni Riihimaki, Marko Hannikainen, Timo D. Hamalainen, Klaus KronlofAbstract:The unified modeling language (UML) 2.0 is emerging in the area of embedded system design. This paper presents a new UML 2.0 profile - called TUT-profile - that introduces a set of stereotypes and design rules for an application, platform, and mapping. The profile classifies different application and platform Components, and enables their parameterization. The TUT-profile concentrates on the structure of an application and platform, and utilizes standard UML 2.0 for the behavioral modeling. The application is seen as a set of active classes with an internal behavior. Correspondingly, the platform is seen as a Component Library with a parameterized presentation in UML 2.0 for each Library Component.
-
UML 2.0 Profile for Embedded System Design
2005Co-Authors: Petri Kukkala, Jouni Riihimaki, Marko Hannikainen, Timo D. Hamalainen, Klaus KronlofAbstract:Unified Modeling Language (UML) 2.0 is emerging in the area of embedded system design. This paper presents a new UML 2.0 profile - called TUT-Profile - that introduces a set of stereotypes and design rules for an application, platform, and mapping. The profile classifies different application and platform Components, and enables their parameterization. TUT-Profile concentrates on the structure of an application and platform, and utilizes standard UML 2.0 for the behavioral modeling. The application is seen as a set of active classes with an internal behavior. Correspondingly, the platform is seen as a Component Library with a parameterized presentation in UML 2.0 for each Library Component.
-
DATE - UML 2.0 Profile for Embedded System Design
Design Automation and Test in Europe, 2005Co-Authors: Petri Kukkala, Jouni Riihimaki, Marko Hannikainen, Timo Hämäläinen, Klaus KronlofAbstract:The unified modeling language (UML) 2.0 is emerging in the area of embedded system design. This paper presents a new UML 2.0 profile - called TUT-profile - that introduces a set of stereotypes and design rules for an application, platform, and mapping. The profile classifies different application and platform Components, and enables their parameterization. The TUT-profile concentrates on the structure of an application and platform, and utilizes standard UML 2.0 for the behavioral modeling. The application is seen as a set of active classes with an internal behavior. Correspondingly, the platform is seen as a Component Library with a parameterized presentation in UML 2.0 for each Library Component.
Sebastiano Panichella - One of the best experts on this subject based on the ideXlab platform.
-
How the Apache community upgrades dependencies: an evolutionary study
Empirical Software Engineering, 2015Co-Authors: Gabriele Bavota, Gerardo Canfora, Massimiliano Di Penta, Rocco Oliveto, Sebastiano PanichellaAbstract:Software ecosystems consist of multiple software projects, often interrelated by means of dependency relations. When one project undergoes changes, other projects may decide to upgrade their dependency. For example, a project could use a new version of a Component from another project because the latter has been enhanced or subject to some bug-fixing activities. In this paper we study the evolution of dependencies between projects in the Java subset of the Apache ecosystem, consisting of 147 projects, for a period of 14 years, resulting in 1,964 releases. Specifically, we investigate (i) how dependencies between projects evolve over time when the ecosystem grows, (ii) what are the product and process factors that can likely trigger dependency upgrades, (iii) how developers discuss the needs and risks of such upgrades, and (iv) what is the likely impact of upgrades on client projects. The study results—qualitatively confirmed by observations made by analyzing the developers’ discussion—indicate that when a new release of a project is issued, it triggers an upgrade when the new release includes major changes (e.g., new features/services) as well as large amount of bug fixes. Instead, developers are reluctant to perform an upgrade when some APIs are removed. The impact of upgrades is generally low, unless it is related to frameworks/libraries used in crosscutting concerns. Results of this study can support the understanding of the of Library/Component upgrade phenomenon, and provide the basis for a new family of recommenders aimed at supporting developers in the complex (and risky) activity of managing Library/Component upgrade within their software projects.
-
ICSM - The Evolution of Project Inter-dependencies in a Software Ecosystem: The Case of Apache
2013 IEEE International Conference on Software Maintenance, 2013Co-Authors: Gabriele Bavota, Gerardo Canfora, Massimiliano Di Penta, Rocco Oliveto, Sebastiano PanichellaAbstract:Software ecosystems consist of multiple software projects, often interrelated each other by means of dependency relations. When one project undergoes changes, other projects may decide to upgrade the dependency. For example, a project could use a new version of another project because the latter has been enhanced or subject to some bug-fixing activities. This paper reports an exploratory study aimed at observing the evolution of the Java subset of the Apache ecosystem, consisting of 147 projects, for a period of 14 years, and resulting in 1,964 releases. Specifically, we analyze (i) how dependencies change over time, (ii) whether a dependency upgrade is due to different kinds of factors, such as different kinds of API changes or licensing issues, and (iii) how an upgrade impacts on a related project. Results of this study help to comprehend the phenomenon of Library/Component upgrade, and provides the basis for a new family of recommenders aimed at supporting developers in the complex (and risky) activity of managing Library/Component upgrade within their software projects.
-
The Evolution of Project Inter-dependencies in a Software Ecosystem: The Case of Apache
2013 IEEE International Conference on Software Maintenance, 2013Co-Authors: Gabriele Bavota, Gerardo Canfora, Massimiliano Di Penta, Rocco Oliveto, Sebastiano PanichellaAbstract:Software ecosystems consist of multiple software projects, often interrelated each other by means of dependency relations. When one project undergoes changes, other projects may decide to upgrade the dependency. For example, a project could use a new version of another project because the latter has been enhanced or subject to some bug-fixing activities. This paper reports an exploratory study aimed at observing the evolution of the Java subset of the Apache ecosystem, consisting of 147 projects, for a period of 14 years, and resulting in 1,964 releases. Specifically, we analyze (i) how dependencies change over time, (ii) whether a dependency upgrade is due to different kinds of factors, such as different kinds of API changes or licensing issues, and (iii) how an upgrade impacts on a related project. Results of this study help to comprehend the phenomenon of Library/Component upgrade, and provides the basis for a new family of recommenders aimed at supporting developers in the complex (and risky) activity of managing Library/Component upgrade within their software projects.
Marko Hannikainen - One of the best experts on this subject based on the ideXlab platform.
-
UML 2.0 profile for embedded system design
Design Automation and Test in Europe, 2005Co-Authors: Petri Kukkala, Jouni Riihimaki, Marko Hannikainen, Timo D. Hamalainen, Klaus KronlofAbstract:The unified modeling language (UML) 2.0 is emerging in the area of embedded system design. This paper presents a new UML 2.0 profile - called TUT-profile - that introduces a set of stereotypes and design rules for an application, platform, and mapping. The profile classifies different application and platform Components, and enables their parameterization. The TUT-profile concentrates on the structure of an application and platform, and utilizes standard UML 2.0 for the behavioral modeling. The application is seen as a set of active classes with an internal behavior. Correspondingly, the platform is seen as a Component Library with a parameterized presentation in UML 2.0 for each Library Component.
-
UML 2.0 Profile for Embedded System Design
2005Co-Authors: Petri Kukkala, Jouni Riihimaki, Marko Hannikainen, Timo D. Hamalainen, Klaus KronlofAbstract:Unified Modeling Language (UML) 2.0 is emerging in the area of embedded system design. This paper presents a new UML 2.0 profile - called TUT-Profile - that introduces a set of stereotypes and design rules for an application, platform, and mapping. The profile classifies different application and platform Components, and enables their parameterization. TUT-Profile concentrates on the structure of an application and platform, and utilizes standard UML 2.0 for the behavioral modeling. The application is seen as a set of active classes with an internal behavior. Correspondingly, the platform is seen as a Component Library with a parameterized presentation in UML 2.0 for each Library Component.
-
DATE - UML 2.0 Profile for Embedded System Design
Design Automation and Test in Europe, 2005Co-Authors: Petri Kukkala, Jouni Riihimaki, Marko Hannikainen, Timo Hämäläinen, Klaus KronlofAbstract:The unified modeling language (UML) 2.0 is emerging in the area of embedded system design. This paper presents a new UML 2.0 profile - called TUT-profile - that introduces a set of stereotypes and design rules for an application, platform, and mapping. The profile classifies different application and platform Components, and enables their parameterization. The TUT-profile concentrates on the structure of an application and platform, and utilizes standard UML 2.0 for the behavioral modeling. The application is seen as a set of active classes with an internal behavior. Correspondingly, the platform is seen as a Component Library with a parameterized presentation in UML 2.0 for each Library Component.