| 1. |
- Binotto, Alécio P. D., et al.
(författare)
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Towards task dynamic reconfiguration over asymmetric computing platforms for UAVs surveillance systems
- 2009
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Ingår i: Scalable computing. - Timisoara : Universitatea de Vest din Timisoara / West University of Timisoara. - 1895-1767. ; 10:3, s. 277-289
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Tidskriftsartikel (refereegranskat)abstract
- High-performance platforms are required by modern applications that make use of massive calculations. Actually, low-cost and high-performance specific hardware (e.g. GPU) can be a good alternative along with CPUs, which turned to multiple cores, forming powerful heterogeneous desktop execution platforms. Therefore, self-adaptive computing is a promising paradigm as it can provide flexibility to explore different computing resources, on which heterogeneous cluster can be created to improve performance on different execution scenarios. One approach is to explore run-time tasks migration among node's hardware towards an optimal system load-balancing aiming at performance gains. This way, time requirements and its crosscutting behavior play an important role for task (re)allocation decisions. This paper presents a self-rescheduling task strategy that makes use of aspect-oriented paradigms to address non-functional application timing constraints from earlier design phases. A case study exploring Radar Image Processing tasks is presented to demonstrate the proposed approach. Simulations results for this case study are provided in the context of a surveillance system based on Unmanned Aerial Vehicles (UAVs). © 2009 SCPE.
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| 2. |
- de Freitas, Edison Pignaton, et al.
(författare)
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Supporting platform for heterogeneous sensor network operation based on unmanned vehicles systems and wireless sensor nodes
- 2009
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Ingår i: 2009 IEEE Intelligent Vehicles Symposium, Volumes 1 and 2. - New York : IEEE Press. - 9781424435036 ; , s. 786-791
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Konferensbidrag (refereegranskat)abstract
- Advances in vehicle intelligence technology is enabling the development of systems composed of unmanned vehicles, which are able to interact with devices spread on the environment in order to take decisions related to their movements. Sensor networks represent an area that can profit a lot of this new possibilities, as autonomous vehicles can be used to carry sensor devices, which interacting with static sensor nodes can enhance the results provided by the overall system. However, some problems arise in applications' development in such systems due to the network nodes heterogeneity, and also the dynamicity of the environment in which they are deployed, which changes constantly. Thus, new platform solutions are necessary to handle the heterogeneous nodes capabilities in order to facilitate coordination and integration among them. This paper proposes a supporting infrastructure to address these problems composed of an adaptive middleware and a customizable sensor node platform. The goal is to support cooperation in heterogeneous sensor networks, which are composed by static and mobile nodes with different capabilities. The middleware adapts itself in order to manage the very distinct computing resources of the nodes, and also changes in the environment and in the application demands. The customizable sensor node platform allows optimizations in hw/sw modules to meet specific application requirements, allowing the creation of low-end and resource rich nodes that work in an integrated network. In order to illustrate the proposed approach, a system for military surveillance applications is presented as case study.
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| 3. |
- Wehrmeister, Marco A., et al.
(författare)
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A Case Study to Evaluate Pros/Cons of Aspect- and Object-Oriented Paradigms to Model Distributed Embedded Real-Time Systems
- 2008
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Ingår i: 5th International Workshop on Model-based Methodologies for Pervasive and Embedded Software, 2008. MOMPES 2008. - Los Alamitos, California : IEEE Computer Society. - 9780769531045 ; , s. 44-54
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Konferensbidrag (refereegranskat)abstract
- The growing design complexity of today's embedded real-time systems requires new techniques aiming the raising of the abstraction level since earlier stages of design in order to deal with such complexity in a suitable way. This paper reports a case study, which provides an assessment of two well-know high- level paradigms, namely aspect- (AO) and object- oriented (00) paradigms. Concepts of both paradigms were applied at modeling phase of a distributed embedded real-time system (DERTS). The handling of DERTS' functional and non-functional requirements (at modeling level) using AO and 00 concepts is discussed. Both paradigms are compared using of a set of software engineering metrics, which were adapted to be applied at modeling level. The presented results show the suitability of each paradigm for DERTS specification in terms of reusability quality of model elements.
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| 4. |
- Wehrmeister, Marco A., et al.
(författare)
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An Infrastructure for UML-Based Code Generation Tools
- 2009
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Ingår i: Analysis, architectures and modelling of embedded systems. - New York : Springer-Verlag New York. - 9783642042836 ; , s. 32-43
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Konferensbidrag (refereegranskat)abstract
- The use of Model-Driven Engineering (MDE) techniques in the domain of distributed embedded real-time systems are gain importance in order to cope with the increasing design complexity of such systems. This paper discusses an infrastructure created to build GenERTiCA, a flexible tool that supports a MDE approach, which uses aspect-oriented concepts to handle nonfunctional requirements from embedded and real-time systems domain. GenERTiCA generates source code from UML models, and also performs weaving of aspects, which have been specified within the UML model. Additionally, this paper discusses the Distributed Embedded Real-Time Compact Specification (DERCS), a PIM created to support UML-based code generation tools. Some heuristics to transform UML models into DERCS, which have been implemented in GenERTiCA, are also discussed.
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| 5. |
- Wehrmeister, Marco A., et al.
(författare)
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Using GenERTiCA to generation code from RT-UML : A case study
- 2009
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Ingår i: Elsevier IFAC Publications / IFAC Proceedings series. - Frankfurt : Elsevier. - 1474-6670. ; 13:PART 1, s. 674-679
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Tidskriftsartikel (refereegranskat)abstract
- Tool support is essential to allow the use of Model-Driven Engineering (MDE) in the design of distributed embedded real-time systems. GenERTiCA is a flexible tool that supports a MDE approach, which uses concepts of Aspect-Oriented Development (AOD) to handle non-functional requirements from real-time and embedded systems domain. This paper presents a comprehensive case study that illustrates GenERTiCA usage to generate source code from UML models. GenERTiCA also performs aspects weaving using aspect’s information specified in UML models. Results regarding source code generation for a Java platform based on the Real-Time Specification for Java (RTSJ) are presented. Additionally, this paper discusses the implementation of some aspects of a high-level aspects framework, named DERAF, using the mentioned platform. © 2009 IFAC.
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