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2011 International Conference on Electric and Electronics, EEIC 2011

作者： Nejad, Ebrahim Behrouzian Khademzadeh, Ahmad Badie, Kambiz Rahmani, Amir Masoud Nejad, Mohammad Behrouzian Zadeali, Ahmad Computer Engineering Department Shushtar Branch Islamic Azad University Shushtar Iran Iran Telecommunication Research Center Tehran Iran Computer Engineering Department Science and Research Branch Islamic Azad University Tehran Iran Computer Engineering Department Dezful Branch Islamic Azad University Dezful Iran

ISBN: (纸本)9783642216961

Network-on-Chip(NoC) has been proposed as a solution to provide better modularity, scalability, reliability and higher bandwidth compared to bus-based communication infrastructures. The performance of Network-on-Chip largely depends on the underlying routing techniques. A routing technique has two constituencies: output selection and input selection. this paper focuses on the improvement of input selection. Two traditional input selections have been used in NoC, First-Come-First-Served (FCFS) input selection and Round-Robin input selection. also, recently a contention-aware input selection (CAIS) technique has been presented for NOC, But there is some problem and defection in this technique. In this paper we improve the problems and defections of contention-aware input selection (CAIS) technique to develop a simple yet effective input selection technique named ICAIS. The simulation results with different traffic patterns show that ICAIS can achieves better performance than the FCFS and CAIS input selections, when combined with either deterministic or adaptive output selection. © 2011 Springer-Verlag Berlin Heidelberg.

关键词： Network-on-chip

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Microstructural and electrical properties of Ce_0.9Gd_0.1O1.95 thin film electrolyte in solid oxide fuel cells (vol 26, pg 854, 2011)

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JOURNAL OF MATERIALS RESEARCH 2011年第11期26卷 E1-E1页

作者： Cho, Sungmee Yoon, Jongsik Kim, Jung-Hyun Zhang, Xinghang Manthiram, Arumugam Wang, Haiyan Department of Electrical and Computer Engineering Texas A&M University College Station Texas 77843-3128 Electrochemical Energy Laboratory and Materials Science and Engineering Program University of Texas at Austin Austin Texas 78712 Department of Mechanical Engineering Texas A&M University College Station Texas 77843-3123

Microstructural and electrical properties of Gd-doped CeO2 (GDC; Ce0.9Gd0.1O1.95) thin films prepared by pulsed laser deposition as an electrolyte in solid-oxide fuel cells (SOFCs) were investigated. The GDC thin films were prepared on various substrates including single-crystal yttria-stabilized zirconia (YSZ) and magnesium oxide (MgO) substrates. The GDC thin-film electrolytes with different grain sizes and grain morphologies were prepared by varying the deposition parameters, such as substrate temperature, oxygen partial pressure, target repetition rate, and laser ablation energy. The microstructural properties of these films were examined using X-ray diffraction (XRD), transmission electron microscopy (TEM), and atomic force microscopy (AFM). Alternating-current (AC) and direct-current (DC) electrical measurements through in-plane method show that the electrical property of the GDC thin film strongly depends on grain size, e.g., the total conductivity of the films deposited at 700 °C (7.3 × 10−3 S/cm) is about 20 times higher than the ones deposited at room temperature (3.6 × 10−4 S/cm) at the measurement temperature of 600 °C.

关键词： Thin Film Electrical Properties Physical Vapor Deposition (PVD)

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Formation of a paper neural-fuzzy time scale in the eastern Asia

Formation of a paper neural-fuzzy time scale in the eastern ...

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5th Joint Conference of the 65th IEEE International Frequency Control Symposium, IFCS 2011 and 25th European Frequency and Time Forum, EFTF 2011

作者： Liao, Chia-Shu Chu, Fand-Dar Lin, Huang-Tien Huang, Yi-Jiun Tu, Kun-Yuan Chung, Yen-Wen Hsu, Wei-Chih National Time and Frequency Standard Laboratory Telecommunication Laboratories Chunghwa Telecom Taoyuan 326 Taiwan Department of Computer Science and Information Engineering Vanung University Taoyuan 320 Taiwan Department of Computer and Communication Engineering National Kaohsiung First University of Science and Technology Kaohsiung 811 Taiwan

ISBN: (纸本)9781612841106

This work presents a novel scheme to simulate a paper time scale by utilizing ensemble clock data of time laboratories in the eastern Asia-Pacific region. Based on integration of the above data with a neural-fuzzy prediction approach, the time difference with a local coordinated universal time is analyzed by a reference time scale devised in this work. Validity of the proposed scheme is investigated by undertaking a 250-day long neural-fuzzy predictor that is based on the calculated clock ensembles from Asian time laboratories. In the Asia-Pacific rim region, TWSTFT links from four laboratories, including the National Institute of Information and Communications Technology of Japan (NICT), the National Time Service Center of China (NTSC), the Korea Research Institute of Standards and science of Korea (KRISS), and the telecommunication Laboratories of Taiwan (TL), have formed a time transfer network based on use of multi-channel TWSTFT time transfer modems. Thus, a paper neural-fuzzy reference time scale by using the ensemble clock data among NICT, NTSC, KRISS, and TL in the Asia-Pacific region is simulated. Moreover, the performance of the proposed time scale is evaluated. © 2011 IEEE.

关键词： Laboratories

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Propositional dynamic logic with storing, recovering and parallel composition

Propositional dynamic logic with storing, recovering and par...

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作者： Benevides, Mario R.F. De Freitas, Renata Petrucio, Viana Computer Science Department Systems and Computer Engineering Program Federal University of Rio de Janeiro Brazil Institute of Mathematics Fluminense Federal University Brazil

This work extends Propositional Dynamic Logic (PDL) with parallel composition operator and four atomic programs which formalize the storing and recovering of elements in data structures. A generalization of Kripke semantics is proposed that instead of using set of possible states it uses structured sets of possible states. This new semantics allows for representing data structures and using the five new operator one is capable of reasoning about the manipulation of these data structures. The use of the new language (PRSPDL) is illustrated with some examples. We present sound and complete set of axiom schemata and inference rules to prove all the valid formulas for a restricted fragment called RSPDLo. © 2011 Elsevier B.V. All rights reserved.

关键词： Data structures

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Extracting regions of interest based on visual attention model

Extracting regions of interest based on visual attention mod...

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2nd International Conference on Multimedia Technology, ICMT 2011

作者： Lin, Qing Xu, Xiaogang Zhan, Yongzhao Liao, Dingan School of Computer Science and Telecommunication Engineering Jiangsu University Zhenjiang Jiangsu China School of Computer Science and Technology Nanjing University of Science and Technology Nanjing Jiangsu China Department of Information Technology Changzhou Textile Garment Institute Changzhou Jiangsu China

ISBN: (纸本)9781612847740

This paper proposed a new approach of extracting regions of interest based on visual attention model, which segmented image regions with the region growing algorithm. According to the physiological characteristics of Human Visual System (HVS), image features were extracted by non-uniform sampling of image and computing "center-surround", which were used to simulate the human visual receptive field properties. Features became multi-scale conspicuity maps, which were combined into a saliency map. The focus of attention (FOA) as seeds of the region growing algorithm was obtained by the "winner-take-all" (WTA) competition. Then the regions of interest were extracted by using the region growing algorithm. The experiment results show that this approach can select suitable seeds automatically and the extraction of regions of interest can be consistent with human visual attention mechanism. © 2011 IEEE.

关键词： Behavioral research

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Performance analysis for truncated ARQ based DSFBC-CO-OFDM communication scheme

Performance analysis for truncated ARQ based DSFBC-CO-OFDM c...

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24th International Conference on computer Applications in Industry and engineering, CAINE 2011

作者： Ahmed, Irfan Aljahdali, Sultan Hundewale, Nisar Mohamed, Amr Shah, Syed Ismail College of Computers and Information Technology Taif University Taif Saudi Arabia Department of Computer Science and Engineering Qatar University Doha Qatar School of Telecommunication Engineering Iqra University Islamabad Pakistan

ISBN: (纸本)9781880843833

We develop and analyze an ARQ (Automatic Repeat reQuest) based distributed space-frequency block code-orthogonal frequency division multiplexing protocol for cooperative communications (DSFBC-CO-OFDM). At PHY layer, space frequency block codes (SFBC) are spread over OFDM subcarriers instead of OFDM symbols to compensate for the small coherence time. Medium access control (MAC) layer packet retransmission limit has been used as an actuator for transmit cooperative diversity initialization. Transmit diversity is provided by the relays in close proximity to source node. Closed form expressions are obtained for packet error rate (PER) and average delay for the proposed scheme in Nakagami-m fading channels. This cooperative scheme achieves lower signal-to-noise ratio (SNR) values for desired packet error rate and markedly improves the average delay per packet compared to the direct transmissions at low SNR regime. Finally, the results of computer simulations are included to demonstrate the efficacy of the proposed scheme and to verify the accuracy of analytical expressions.

关键词： Cooperative communication

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When social networking meets the next generation network

When social networking meets the next generation network

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13th Asia-Pacific Network Operations and Management Symposium: Managing Clouds, Smart Networks and Services, APNOMS 2011

作者： Chen, Rebecca Tsai, Meng-Hsun Wrobel, Tony Chen, Jui-Ming Wang, Sih-Han Ku, Shu-Shan Jung, Jen-Huei Jeng, Jeu-Yih IBM Taipei Taiwan Department of Computer Science and Information Engineering National Cheng Kung University Tainan Taiwan IBM United States Networked Communications Program Taipei Taiwan Department of Computer Science National Chiao Tung University Hsinchu Taiwan Telecommunication Laboratories Chunghwa Telecom. Co. Ltd. Taipei Taiwan

ISBN: (纸本)9781457716706

As mobile technologies evolved, the mobile networks provided users not only high mobility, but also high data rates and flexible services. Meanwhile, Internet services had been very successful from 1970s to date. However, the Internet and the mobile telecommunications evolved separately and were not compatible until 3GPP proposed the IP Multimedia Subsystem (IMS). In this paper, we first introduce mobile Web 2.0 application creation in the next generation IMS network. Then we propose a proof-of-concept service called "JoinMe" on the IBM-NCTU IMS network to study how a social networking service can be created for mobile networks. © 2011 IEEE.

关键词： Web services

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A novel and optimal video replication technique for video-on-demand systems 11

A novel and optimal video replication technique for video-on...

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Proceedings of the International Conference & Workshop on Emerging Trends in Technology

作者： Vinay, A. Prakash, Abhinav Kiran Kumar, D.S. Nagabhushan, K. Anitha, T.N. Department of Information Science and Engineering P E S Institute of Technology Bangalore Karnataka India Department of Telecommunication Engineering P E S Institute of Technology Bangalore Karnataka India Department of Computer Science and Engineering S J C Institute of Technology Chikkabalapura Karnataka India

ISBN: (纸本)9781450304498

With the advances in Information, Networking and Communication technologies, the Multimedia services are gaining high popularity. Especially applications like Video-On-Demand (VoD) systems are becoming inherently popular. VoD is a data-intensive application because clients frequently retrieve data stored on high end servers. As the numbers of users are exponentially growing from thousands to millions severing such large request is a great challenge to the multimedia companies. Hence VoD service providers are intensely interested in high QoS services to users by using efficient algorithms or strategies or architectures. Numerous solutions in terms of algorithms or architectures are available to reduce response times. Among these an efficient techniques for replication, storage and retrieval/streaming has attracted much attention from researchers due to its effectiveness and low cost. This paper focuses on proposing an optimal video replication, storage and retrieval strategies for VoD systems. Copyright © 2011 ACM.

关键词： Video on demand

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A multithreaded based load balancing framework for video-on-demand systems 11

A multithreaded based load balancing framework for video-on-...

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Proceedings of the International Conference & Workshop on Emerging Trends in Technology

ISBN: (纸本)9781450304498

Advancements in computing and networking have paved a path for the growth of the multimedia industry. Today, multimedia has a number of applications that can significantly attract a wide range of customers towards it. Applications such as digital libraries and Video-on-Demand (VoD) services are becoming more popular in the current era. Thus, online access to multimedia information has become possible and cost efficient. As the number of customers increase, the load on the server(s) also increases and may future lead to degradation of the performance of the system as well as the QoS being offered. This is mainly due to some of the effects of heavy load on the servers. Thus, load balancing is becoming more a trivial issue in the design of VoD systems. This paper focuses on proposing a multithreaded dynamic load balancing strategy for Video-on-Demand (VoD) systems. Copyright © 2011 ACM.

关键词： Quality of service

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Porantim-opt: Optimizing the combined selection of model-based testing techniques

Porantim-opt: Optimizing the combined selection of model-bas...

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Workshop on Requirements and Validation, Verification, and Testing

作者： Neto, Arilo Claudio Dias De Freitas Rodrigues, Rosiane Travassos, Guilherme Horta Post-graduation Program In Informatics Computer Science Department Federal University of Amazonas Manaus AM Brazil Systems Engineering and Computer Science Program COPPE Federal University of Rio De Janeiro Rio De Janeiro RJ Brazil

ISBN: (纸本)9780769543451

The combination of testing techniques is considered an effective strategy to evaluate a software product. However, the selection of which techniques to combine in a software project has been an interesting challenge in the Software engineering field. This paper presents a proposal extending an approach developed to support the combined selection of model-based testing (MBT) techniques, named Porantim, applying Multiobjective Combinatorial Optimization strategy by determining the smallest dominating set in a bipartite and weighted graph. Thus, a local search strategy algorithm is proposed generating solutions aiming at maximizing the coverage of software project characteristics and skills required by the testing team to use the techniques and minimizing the eventual effort to construct models used for test cases generation. A preliminary evaluation analyzes this new approach when compared to the Porantim's original version, and the results indicate improvements in the MBT techniques selection. © 2011 IEEE.

关键词： Software testing

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