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Context-aware multimedia service composition using quality assessment

Context-aware multimedia service composition using quality a...

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2011 12th IEEE International Conference on Multimedia and Expo, ICME 2011

作者： Gonzalez, Alberto J. Alcober, Jesus De Pozuelo, Ramon Martin Pinyol, Francesc Ghafoor, Kayhan Zrar Technical University of Catalonia/i2CAT Foundation Department of Telematic Engineering Esteve Terradas 7 08860 Castelldefels Spain La Salle-Ramon Llull University GTM Media Technologies Research Group Quatre Camins 2 08022 Barcelona Spain Universiti Teknologi Malaysia Faculty of Computer Sc. and Inf. Systems 81310 Skudai Johor D. T. Malaysia

ISBN: (纸本)9781612843490

With the proliferation of multimedia capable devices, media services have to deal with heterogeneous environments where very different types of terminals wish to receive content anywhere and anytime. This situation motivates the appearance of multimedia services that adapt contents to the specific context of users. However, current Internet architecture is based on a rigid layered model, which makes difficult to introduce new functionalities efficiently. To solve this, Service Oriented Architectures (SOA) appear with the goal of proposing new architectures based on services that can be invoked when and where necessary. This work introduces how SOA paradigm can be applied to context-aware multimedia communications. In addition, a scoring function for selecting different service implementations is presented and particularized for a case of selecting transcoding functions taking into account different quality assessment metrics. © 2011 IEEE.

关键词： Multimedia services

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"Omni-Winker": The device to express locomotive behavior of omnidirectional vehicles for interactive collision avoidance

"Omni-Winker": The device to express locomotive behavior of ...

引用

International Workshop on Advanced Computational Intelligence and Intelligent inf.rmatics, IWACIII 2011

作者： Yamazaki, Yoichi Hayashi, Kei Kadokura, Nozomi Motoki, Makoto Hashimoto, Takuya Tadakuma, Kenjiro Hirota, Kaoru Dept. Electr. Electron. and Inf. Eng. Kanto Gakuin University 1-50-1 Mutsuura-higashi Kanazawa-ku Yokohama 236-8501 Japan Department of Mechanical Engineering Tokyo University of Science 1-14-6 Kudankita Chiyoda-ku Tokyo 102-0073 Japan Department of Mechanical Engineering Osaka University 2-1 Yamadaoka Suita Osaka 565-0871 Japan Department of C.I. and S.S. Tokyo Institute of Technology G3-49 4259 Nagatsuta Midori-ku Yokohama 226-8502 Japan

Omnidirectional vehicles acting in human environment need to express their actions, because it is difficult for human to predict actions of the vehicles due to the loss of changes in posture. Omni-Winker is proposed as an indicator for omnidirectional vehicles, where the Omni-Winker expresses locomotive behavior such as the direction and speed of the vehicle to all human around the vehicles. Two type of Omni-Winker are developed and evaluated in Human-Robot Interaction situations. The proposed Omni-Winker leads to interactive collision avoidance, where the winker encourages human-driven collision avoidance in addition to existing intelligent sensing technology.

关键词： Human robot interaction

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A security testing approach for WSN protocols based on object-oriented attack model

A security testing approach for WSN protocols based on objec...

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International Conference on Computational Intelligence and Security

作者： Yue Qi Qingqi Pei Yong Zeng Chao Yang Shu-po Bu State Key Laboratory of Integrated Service Networks Xidian University Xi'an China Key Laboratory of Computer Networks and Information Security of Ministry of Education China Key Lab. of Comput. Networks & Inf. Security Minist. of Educ. Guangzhou China Department of Electronic Engineering Suzhou Institute of Industrial Technology Suzhou China

In this paper, we propose an object-oriented attack model to represent a protocol attack in WSN detailedly. The model describes multiple attributes of an attack, including its principle, impact, interdependent relationships with other attacks, etc. Then, on the basis of the attack model and the FSM description method, we present a security testing approach for WSN protocols, in order to evaluate the security of the tested protocols. Finally, we take the TinyPK protocol and Sybil attack for example to implement our design, and the Protocol Security Testing Report shows as expected that the TinyPK cannot resist the Sybil attack. Thus, the security testing approach proposed is feasible.

关键词： Protocols Wireless sensor networks Object oriented modeling Testing Authentication Availability

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Research and exploration on network public sentiment monitoring for financial securities based on ontology

Research and exploration on network public sentiment monitor...

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2010 International Conference on computer Application and System Modeling, ICCASM 2010

作者： Zhu, Jiang Wang, Shi-Min Dept. of Computer Science and Inf. Engineering Beijing Technology and Business University BTBU Beijing 100048 China

ISBN: (纸本)9781424472369

According to the application research in the inf.rmation system and the rules of construction on domain ontology, this paper proposed the conception of adding the financial domain ontology to the existing public sentiment monitoring system for financial securities and built the system architecture based on ontology to resolve the problems such as the integration of heterogeneous data, domain inf.rmation sharing, the communication among netizens by using different terminology, the intelligence of providing public sentiment and the phenomenon of noise, which laid the foundation of realizing the artificial intelligence technology. With the help of the existing system, the paper focused on introducing the construction and formation of domain ontology and describing the integration between domain ontology and system, based on which a semantic system would be formed and the final result would be predicted. © 2010 IEEE.

关键词： Semantics

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Class based availability considerations in GMPLS networks

Class based availability considerations in GMPLS networks

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15th IEEE Symposium on computers and Communications, ISCC 2010

作者： Sancak, Adnan Kantarci, Burak Oktug, Sema Computer Engineering Department Istanbul Technical University Istanbul Turkey School of Inf. Tech. and Engineering University of Ottawa ON Canada

ISBN: (纸本)9781424477555

Extended use of MPLS technology in transport networks which improves routing performance introduced some more sophisticated requirements like Advanced Network Management, Quality of Service (QoS) and Resource Optimization. Generalized Multiprotocol Label Switching (GMPLS) architecture mostly meet these requirements however, connection and network availability needs to be considered. In this paper, we propose a new survivable connection provisioning scheme based on Spare Capacity Allocation (SCA) to maximize resource utilization while guaranteeing availability requirement defined in Service Level Agreement (SLA). We also present two additional class-based heuristic methods, namely Least Reliable Path (LRP) and Exchange Method (EM) in order to minimize blocking probability of incoming connection requests. We compare the performance of the optimization-based model and the proposed heuristics by simulation. The simulation results show that the LRP method leads to the least blocking probability while the SCA-based connection provisioning and the EM demonstrates the same blocking probability level. Furthermore, it is also shown that the heuristics do not introduce additional resource overbuild to the network when compared to the SCAbased model for different load levels. © 2010 IEEE.

关键词： Blocking probability

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Using interactive GA for requirements prioritization

Using interactive GA for requirements prioritization

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2nd International Symposium on Search Based Software engineering, SSBSE 2010

作者： Tonella, Paolo Susi, Angelo Palma, Francis Fondazione Bruno Kessler Software Engineering Research Unit Trento Italy University of Trento Department of Inf. Eng. and Computer Science Trento Italy

ISBN: (纸本)9780769541952

The order in which requirements are implemented in a system affects the value delivered to the final users in the successive releases of the system. Requirements prioritization aims at ranking the requirements so as to trade off user priorities and implementation constraints, such as technical dependencies among requirements and necessarily limited resources allocated to the project. Requirement analysts possess relevant knowledge about the relative importance of requirements. We use an Interactive Genetic Algorithm to produce a requirement ordering which complies with the existing priorities, satisfies the technical constraints and takes into account the relative preferences elicited from the user. On a real case study, we show that this approach improves non interactive optimization, ignoring the elicited preferences, and that it can handle a number of requirements which is otherwise problematic for state of the art techniques. © 2010 IEEE.

关键词： Software engineering

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An RST-tolerant shape descriptor for object detection

An RST-tolerant shape descriptor for object detection

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International Conference on Pattern Recognition

作者： Su, Chih-Wen Liao, Hong-Yuan Mark Liang, Yu-Ming Tyan, Hsiao-Rong Institute of Information Science Academia Sinica Taiwan Institutes of Computer Science and Engineering National Chiao Tung University Taiwan Department of Computer Science and Information Engineering Aletheia University Dept. Inf. and Comput. Eng. Chung Yuan Christian University Taiwan

ISBN: (纸本)9780769541099

In this paper, we propose a new object detection method that does not need a learning mechanism. Given a hand-drawn model as a query, we can detect and locate objects that are similar to the query model in cluttered images. To ensure the invariance with respect to rotation, scaling, and translation (RST), high curvature points (HCPs) on edges are detected first .Each pair of HCPs is then used to determine a circular region and all edge pixels covered by the circular region are transformed into a polar histogram. Finally, we use these local descriptors to detect and locate similar objects within any images. The experiment results show that the proposed method outperforms the existing state-of-the-art work. © 2010 IEEE.

关键词： Object recognition

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Combustible gases and early fire detection: An autonomous system for wireless sensor networks 10

Combustible gases and early fire detection: An autonomous sy...

引用

1st International Conference on Energy-Efficient Computing and Networking, e-Energy 2010

作者： Somov, A. Spirjakin, D. Ivanov, M. Khromushin, I. Passerone, R. Baranov, A. Savkin, A. Dept. of Inf. Engineering and Computer Science University of Trento Italy Dept. of High Tech. Radio-Electronics Moscow State Aviation Technological University Russia

ISBN: (纸本)9781450300421

Fires or toxic gas leakages may have grave consequences like significant pecuniary loss or even lead to human victims. In this paper we present an autonomous wireless sensor system for early fire and gas leak detection. The system consists of two modules: a gas sensor module and a power management module. The operation of the gas sensor module is based on the pyrolysis product detection which makes it possible to detect fire before inf.ammation. In addition, the on board gas sensor can identify the type of leaking gas. A generic energy scavenging module, able to handle both alternating current and direct current based ambient energy sources, provides the power supply for the gas sensor module. The harvested energy is stored in two energy buffers of different kind, and is delivered to the sensor node in accordance to an efficient energy supply switching algorithm. At the end of the paper we demonstrate the experimental results on gas detection, energy consumption evaluation, and show how to ensure the system autonomous operation. © 2010 ACM.

关键词： Energy efficiency

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Accelerating HMMER on GPUs by implementing hybrid data and task parallelism 10

Accelerating HMMER on GPUs by implementing hybrid data and t...

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Proceedings of the First ACM International Conference on Bioinf.rmatics and Computational Biology

作者： Ganesan, Narayan Chamberlain, Roger D. Buhler, Jeremy Taufer, Michela University of Delaware Dept. of Computer and Inf. Sciences Newark DE 19716 United States Washington University in St. Louis Computer Science and Engineering St. Louis MO 63130 United States

ISBN: (纸本)9781450304382

Many biologically motivated problems are expressed as dynamic programming recurrences and are difficult to parallelize due to the intrinsic data dependencies in their algorithms. Therefore their solutions have been sped up using task level parallelism only. Emerging platforms such as GPUs are appealing parallel architectures for high-performance;at the same time they are a motivation to rethink the algorithms associated with these problems, to extract finergrained parallelism such as data parallelism. In this paper, we consider the hmmersearch program as a representative of these problems and we re-design its computational algorithm to extract data parallelism for a more efficient execution on emerging platforms, despite the fact that hmmersearch has data dependencies. Our approach outperforms other existing methods when searching a very large database of unsorted sequences on GPUs. Copyright © 2010 ACM.

关键词： Dynamic programming

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Data-Driven Foreground Object Detection from a Non-stationary Camera

Data-Driven Foreground Object Detection from a Non-stationar...

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International Conference on Pattern Recognition

作者： Shih-Wei Sun Fay Huang Hong-Yuan Mark Liao Institute of Information Science Academia Sinica Taipei Taiwan Institute of Computer Science and Inf. Engineering National I-Lan University Yilan Taiwan Department Computer Science and Inf. Engineering National Chiao Tung University Hsinchu Taiwan

ISBN: (纸本)9781424475421

In this paper, we propose a data-driven foreground object detection technique which can detect foreground objects from a moving camera. We propose to build a data-driven consensus foreground object template (CFOT) and then detect the foreground object region in each frame. The proposed foreground object detection technique is equipped with the following functions: (1) the ability to detect the foreground object captured by a fast moving camera ; (2) the ability to detect a low contrast (spatially/temporally) foreground object; and (3) the ability to detect a foreground object from a dynamic background. There are three contributions of our method: (1) a newly proposed data-driven foreground region decision process for generating the CFOT has been shown robust and efficient; (2) a foreground object probability is proposed for properly dealing with the imperfect initial foreground region estimations; and (3) a CFOT is generated for precise foreground object detection.

关键词： Cameras Feature extraction Object detection Estimation Object recognition Pixel Robustness

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