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Context-awareness for service oriented systems

International Journal of computer Science Issues 2012年第5 5-2期9卷 95-104页

作者： Hafiddi, Hatim Baidouri, Hicham Nassar, Mahmoud Kriouile, Abdelaziz Mobile and Embedded Information Systems Lab. Models and Systems Engineering Team National Higher School for Computer Science and Systems Analysis Mohammed V Souissi University BP 713 Agdal Rabat Morocco

Today, service oriented systems need to be enhanced to sense and react to user's context in order to provide a better user experience. To meet this requirement, Context-Aware Services (CAS) have emerged as an underling design and development paradigm for the development of context-aware systems. The fundamental challenges for such systems development are context-awareness management and service adaptation to the user's context. To cope with such requirements, we propose a well designed architecture, named ACAS, to support the development of Context-Aware Service Oriented systems (CASOS). This architecture relies on a set of context-awareness and CAS specifications and metamodels to enhance a core service, in service oriented systems, to be context-aware. This enhancement is fulfilled by the Aspect Adaptations Weaver (A2W) which, based on the Aspect Paradigm (AP) concepts, considers the service's adaptations as aspects. © 2012 International Journal of computer Science Issues.

关键词： Information services

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Partial-LastZ: An optimized hybridization technique for 3D NoC architecture enabling adaptive inter-layer communication

Partial-LastZ: An optimized hybridization technique for 3D N...

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International SoC Design Conference, ISOCC

作者： Amir-Mohammad Rahmani Pasi Liljeberg Juha Plosila Ka Lok Man Youngmin Kim Hannu Tenhunen Embedded Computer and Electronic Systems Lab. University of Turku Finland Xi'an Jiaotong-Liverpool University China UNIST (Ulsan National Institute of Science and Technology) South Korea

Three-dimensional (3D) integration offers greater device integration, reduced signal delay and reduced interconnect power. It also provides greater design flexibility by allowing heterogeneous integration. Stacked mesh 3D NoC architecture was proposed to take advantage of the intrinsic capability of reducing the wire length in 3D ICs. However, this architecture still exacerbates the on-chip power density and router cost. In this paper, we propose a novel hybridization scheme for inter-layer communication using efficient 5-input routers to enhance the overall system power, performance, and area characteristics of the existing Hybrid NoC-Bus 3D mesh architecture. By defining a rule for routing algorithms called LastZ, the proposed area-efficient architecture decreases the overall average hop count of a NoC-based system compared to the existing architectures. We further improve this design by proposing partial-LastZ-based 3D NoC-bus hybrid architecture to provide adaptivity for implementing congestion-aware and fault-tolerant inter-layer routing algorithms. Extensive quantitative experiments demonstrate up to 16% performance improvement compared to the full LastZ-based 3D NoC-bus hybrid architecture and around 20% area reduction compared to the typical hybrid NoC-Bus 3D mesh architecture.

关键词： Routing computer architecture System-on-a-chip Educational institutions Algorithm design and analysis Power demand

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Statement of thesis research: Multi-robot sampling strategies for large-scale oceanographic experiments

Statement of thesis research: Multi-robot sampling strategie...

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22nd International Joint Conference on Artificial Intelligence, IJCAI 2011

作者： Das, Jnaneshwar Robotic Embedded Systems Lab. Department of Computer Science University of Southern California Los Angeles CA 90089 United States

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Obstacle Detection and Avoidance for an Autonomous Surface Vehicle using a Profiling Sonar

Obstacle Detection and Avoidance for an Autonomous Surface V...

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2011 IEEE International Conference on Robotics and Automation(2011年IEEE世界机器人与自动化大会 ICRA 2011)

作者： Hordur K. Heidarsson Gaurav S. Sukhatme Robotic Embedded Systems Lab and the Department of Electrical Engineering University of Southern Cal Robotic Embedded Systems Lab and the Department of Computer Science University of Southern Californi

We present an experimental study of a mechanically scanned profiling sonar for Autonomous Surface Vehicle (ASV) obstacle detection and avoidance. We extract potential obstacles from echo returns and suggest a scanning strategy for sonar in this application. We demonstrate with simulations (driven by data collected in the field) the potential for an ASV to rely solely on sonar data to navigate and avoid obstacles in a lake and harbor environment.

关键词： Lakes Sonar measurements Collision avoidance Sensors Sonar navigation Sonar detection

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Safe automotive software

Safe automotive software

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Lecture Notes in computer Science

作者： Heckemann, Karl Gesell, Manuel Pfister, Thomas Berns, Karsten Schneider, Klaus Trapp, Mario Fraunhofer Institute for Experimental Software Engineering Fraunhofer-Platz 1 67663 Kaiserslautern Germany Embedded Systems Group Department of Computer Science University of Kaiserslautern Germany Robotics Research Lab. Department of Computer Science University of Kaiserslautern Germany

ISBN: (纸本)9783642238659

For automotive manufacturers and tier-1 suppliers, the upcoming safety standard ISO 26262 results in new requirements for the development of embedded electronics and software. In particular, the variety of driver assistance systems that autonomously influence the driving dynamics of a vehicle may have a high risk potential and require development in accordance with the normative guidelines. But especially for those systems whose function is typically not based solely on hardware but on complex software algorithms, safety certification can be very complex or even impossible. In this paper the problems of development of vehicle systems according to ISO 26262 are described. Finally an approach for a safety-oriented reference architecture is presented that introduces adaptive software safety cages. This architecture enables application of formal verification methods. Supported by multisensor data fusion this allows to reduce safety requirements for vehicle control systems. © 2011 Springer-Verlag.

关键词： Control system synthesis

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Radio Frequency Identification (RFID) enabling lean manufacturing

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International Journal of Manufacturing Research 2011年第4期6卷 321-336页

作者： Saygin, Can Sarangapani, Jagannathan Department of Mechanical Engineering Manufacturing Systems and Automation Lab University of Texas at San Antonio San Antonio TX 78249 United States Department of Electrical and Computer Engineering Embedded Systems and Networking Lab Missouri University of Science and Technology Rolla MO 65409 United States

A growing number of organisations are investigating the use of Radio Frequency Identification (RFID) as a tool to improve their business processes across the enterprise. When implemented properly, the benefits RFID brings to supply-chain management, logistics, and asset tracking are clearly understood. Yet many companies do not realise the value RFID can supply by providing data input into a company's Six Sigma and Lean applications by facilitating operational visibility. In this paper, a systematic approach that integrates the phases of business process reengineering, RFID data-based decision making, laboratory-level prototyping, and pilot implementation at industry site are discussed. Copyright © 2011 Inderscience Enterprises Ltd.

关键词： Lean production

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Persistent Ocean Monitoring with Underwater Gliders: Towards Accurate Reconstruction of Dynamic Ocean Processes

Persistent Ocean Monitoring with Underwater Gliders: Towards...

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2011 IEEE International Conference on Robotics and Automation(2011年IEEE世界机器人与自动化大会 ICRA 2011)

作者： Ryan N. Smith Mac Schwager Daniela Rus Stephen L. Smith Gaurav S. Sukhatme School of Engineering Systems at the Queensland University of Technology BrisbaneQLD4000 Australia GRASP Lab University of PennsylvaniaPhiladelphiaPA 19104USA Distributed Robotics Lab Computer Science and Artificial Intelligence LaboratoryMassachusetts Insti Robotic Embedded Systems Laboratory Department of Computer ScienceUniversity of Southern California

This paper proposes a path planning algorithm and a velocity control algorithm for underwater gliders to persistently monitor a patch of ocean. The algorithms address a pressing need among ocean scientists to collect high-value data for studying ocean events of scientific and environmental interest, such as the occurrence of harmful algal blooms. The path planner optimizes a cost function that blends two competing factors: it maximizes the information value of the path, while minimizing the deviation from the path due to ocean currents. The speed control algorithm then optimizes the speed along the planned path so that higher resolution samples are collected in areas of higher information value. The resulting paths are closed circuits that can be repeatedly traversed to collect long term ocean data in dynamic environments. The algorithms were tested during sea trials on an underwater glider operating off the coast of southern California over the course of several weeks. The results show significant improvements in data resolution and path reliability compared to a sampling path that is typically used in the region.

关键词： Oceans Heuristic algorithms Vehicles Monitoring Sea measurements Vehicle dynamics Read only memory

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QoS-enabled group communication in integrated VANET-LTE heterogeneous wireless networks

QoS-enabled group communication in integrated VANET-LTE hete...

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IEEE International Conference on Wireless and Mobile Computing, Networking And Communications (WiMob)

作者： Rajarajan Sivaraj Aravind Kota Gopalakrishna M. Girish Chandra P. Balamuralidhar Embedded Systems Innovation Laboratory Tata Consultancy Services Bangalore India TCS Innovation lab Bangalore India Computer Science at the University of California Davis USA Eindhoven University of Technology The Netherlands

Ubiquitous integration of high-speed WLANs with wide-range 3GPP systems results in the service extension of the backbone cellular network. This paper envisions such heterogeneous wireless network architecture by integrating IEEE 802.11p VANETs with 3GPP LTE to achieve seamless data connectivity for uninterrupted multimedia sessions amongst spatially-apart vehicular clusters. Issues on cluster head-based multicasting and QoS are explored in this paper. An adaptive multi-metric Cluster Head (CH) election mechanism is proposed to manage the VANET sub-clusters. In addition to this, construction of a 2-hop virtual overlay mesh-based shared multicast tree for lower-level multicasting within VANETs is discussed. Following this, the process of VANET-LTE upper-level communication is detailed, addressing the issues of CH and gateway handover, and resource allocation of the LTE eNB. The envisioned architecture enables the LTE to effectively schedule multimedia sessions based on the service requirements of the VANET gateways, thus satisfying QoS. Requisite simulation results are presented to evaluate the integrated network.

关键词： Vehicles Nominations and elections Measurement Logic gates Vehicle dynamics Quality of service Technological innovation

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The model checking view to clock gating and operand isolation

The model checking view to clock gating and operand isolatio...

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10th International Conference on Application of Concurrency to System Design, ACSD 2010

作者： Brandt, Jens Schneider, Klaus Ahuja, Sumit Shukla, Sandeep K. Embedded Systems Group Department of Computer Science University of Kaiserslautern Germany FERMAT Lab Electrical and Computer Engineering Virginia Tech Blackburg VA United States

ISBN: (纸本)9780769540665

Clock gating and operand isolation are two techniques to reduce the power consumption in state-of-the-art hardware designs. Both approaches basically follow a two-step procedure: first, they statically analyze a hardware circuit to determine irrelevant computations. Second, all parts which are responsible for these computations are replaced by others that consume less power in the average case, either by dynamically gating clocks or by isolating operands. This paper focuses on the first phase, i. e. the computation of irrelevant computation. The core of our contribution is the definition of so-called passiveness conditions for each signal x, which indicate that the value currently carried by x does not contribute to the final result of the system. After showing how our theory can be generally used in the context of clock gating and operand isolation, we classify many state-of-the-art approaches and show that they are in fact conservative approximations of our general setting. Thereby, it defines the theoretical basis for adoption of these approaches in their entirety. © 2010 IEEE.

关键词： Model checking

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Side-channel resistance evaluation of a neural network based lightweight cryptography scheme

Side-channel resistance evaluation of a neural network based...

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International Workshop on Wireless Network Algorithm and Theory

作者： Stottinger, Marc Huss, Sorin A. Mühlbach, Sascha Koch, Andreas Integrated Circuits and Systems Lab. Dept. of Computer Science Technische Universitat Darmstadt Germany Germany Embedded Systems and Applications Dept. of Computer Science Technische Universität Darmstadt Germany

ISBN: (纸本)9780769543222

Side-channel attacks have changed the design of secure cryptographic systems dramatically. Several published attacks on implementations of well known algorithms such as, e.g., AES, show the need to consider these aspects to build more resistant cryptographic systems. On the other hand, with the increasing use of cryptography in embedded systems a significant demand exists for cryptographic algorithms that are both resource- and power-efficient. These can be either modified existing or completely new ones. One of the candidates for such a new algorithm is the Tree Parity Machine Public Key Exchange, an algorithm based on artificial neural networks. While it has been evaluated in a number of practical applications in the past, its side-channel resistance has not been examined yet. We would like to close this gap and present a side-channel attack strategy as well as results gathered from measurements made on a real implementation. © 2010 IEEE.

关键词： Side channel attack

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