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作者： Liao, Chien-Hsing Woo, Tai-Kuo Yang, Wan-Shing Degree Program of Infornation Technology Fooyin University Taiwan Department of Information Management National Defense Management College Taiwan Department of Computer and Communication Engineering De-Lin Institute of Technology Taiwan

In this paper, in order to capture the spectrum holes with temporal, spatial and frequency variations in sophisticated FHSS radio environments and avoid interference to the existing primary users, a cognitive radio unit (CRU) model with a uniform scanning (U-scanning) technique and cognitive probability ratio (CPR) metric for cognitive communications has been proposed. In this model, real-time spectrum sensing characteristics are coordinated together with system parameters in temporal and frequency domains, e.g., scanning rate and framing processing time, for evaluating the performance of the cognitive radio communications under an elliptic operation scenario. The CPR value is inverse to the hopping rate, and a high CPR value means high spectrum awareness but low coexistence. Moreover, many intriguing numerical results are also illustrated to examine their interrelationships.

关键词： Cognitive radio

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Correlation functions for storage data and nonreturn-to-zero-inverted modulated data of a high-density magnetic recording channel with partial erasure effect

Correlation functions for storage data and nonreturn-to-zero...

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2010 International Conference on computer Modeling and Simulation, ICCMS 2010

作者： Kao, Tsai-Sheng Chen, Chiu-Hsiung Chen, Sheng-Chih Chang, Yuan-Chang Wang, Shun-Te Department of Electronic Engineering Hwa-Hsia Institute of Technology Taipei Taiwan Department of Computer Science and Information Engineering China University of Technology Hsinchu Taiwan Graduate Program of Digital Contens and Technologies ChengChi University Taipei Taiwan

ISBN: (纸本)9780769539416

As magnetic recording densities grow, the nonlinear distortions, known as transition shift and partial erasure, arise and limit the performance of the detector. Despite that the transition shift can be compensated by a write current technique, the effect of partial erasure complicates the evaluation of the correlation functions for the storage data and the nonreturn-to-zero- inverted modulated data. In this article, we observe the dependence between the partial erasure effect and storage data, and derive the correlation functions for storage data and nonreturn-to-zero-inverted modulated data in a high density magnetic recording channel. The closed-form of the correlation functions are obtained, these results are applied to verify the timing function of the Muller & Mueller's phase detector in a partial response class IV channel via computer simulations. © 2010 IEEE.

关键词： Signal detection

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3-3 Multimedia information hiding

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Journal of the National Institute of Information and Communications technology 2011年第1-2期58卷 183-194页

作者： Takizawa, Osamu Sonoda, Kotaro Yoshioka, Katsunari Suzuki, Jouji Disaster Management and Mitigation Group Japan Security Fundamentals Group Information Security Research Center Japan Computer and Information Science Program Faculty of Engineering Nagasaki University Japan Disaster Management and Mitigation Group Information Security Research Center Japan Interdisciplinary Research Center Yokohama National University Japan Network Security Incident Response Group Information Security Research Center Japan Technology Transfer Promotion Office Outcome Promotion Department Japan Graduate School Research Institute of Environment and Information Sciences Yokohama National University Japan

We research the multimedia information hiding (MIH) which is a technology to overlay digital information on multimedia contents such as picture, sound, document, etc. As application to disaster management of MIH, we have developed a new technology called "PAIH" (Public Address Information Hiding) which is a technology to overlay information such as position or destination on siren sound of urgent vehicles. Siren sound is allowed to degrade of sound quality, but PAIH is required to decode correct information from siren sound with pitch shift (Doppler effect) or under noisy environment.

关键词： Disasters

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CALE: A context-aware living environment based on Zigbee sensor network

CALE: A context-aware living environment based on Zigbee sen...

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International Conference on Mobile Ad-hoc and Sensor Networks

作者： Yu, Kun-Ming Liou, Jian-Yuan Yeh, Bo-Han Yu, Chang Wu Tien, Ching-Cheng Wang, Chih-Hu Wang, Ping-Yu Department of Computer Science and Information Engineering Chung Hua University Taiwan Ph.D. Program of Technology Management Chung Hua University Taiwan Department of Electrical Engineering Chung Hua University Taiwan

ISBN: (纸本)9780769543154

The paper employed some independently developed sensors based on the Octopus X platform to build a Zigbee-based Sensor Networks. Also, we implemented a Location-aware living environment by deploying the developed Zigee-based sensor. Besides, through the created window console interface, the sensed data can be transmitted and transformed to the database for further utilized. Moreover, by the devised Web interface, the update request data can be observed efficiently and responded effectively to any situations. © 2010 IEEE.

关键词： Zigbee

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Selection decode-and-forward relay networks with rectangular QAM in Nakagami-m fading channels

Selection decode-and-forward relay networks with rectangular...

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IEEE Wireless Communications and Networking Conference 2010, WCNC 2010

作者： Al-Qahtani, Fawaz S. Duong, Trung Q. Gurung, Arun K. Bao, Vo Nguyen Quoc National Satellite Technology Program Saudi Arabia Radio Communication Group Blekinge Institute of Technology Sweden School of Electrical and Computer Engineering RMIT University Melbourne VIC Australia Department of Electrical Engineering University of Ulsan Korea Republic of

ISBN: (纸本)9781424463985

In this paper, we investigate the average symbol error probability (SEP) of fixed decode-and-forward relay networks over independent but not identically distributed Nakagami-m fading channels. We have derived closed form expression of SEP for general rectangular quadrature amplitude modulation (QAM) under relay selection scheme where only the best relay forwards message from the source to the destination. The expressions are in terms of hypergeometric series which can be efficiently numerically evaluated. The numerical results are validated with Monte-Carlo simulations. ©2010 IEEE.

关键词： Quadrature amplitude modulation

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One Day Smart Grid Supersession - Analytics and Integration

One Day Smart Grid Supersession - Analytics and Integration

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IEEE Power and Energy Society General Meeting

作者： W. H. Edwin Liu Stephen McArthur Jay Giri Karen Miu Rob Pratt Jun Wen Bob Uluski Luther Dow Gerard Labut Pacific Gas & Electric Company USA Bechtel Institute for Energy and Environment British Energy Advanced Diagnostics Centre University of Strathclyde UK Power Systems Technology and Strategic Initiatives ALSTOM Grid Redmond WA USA Electrical and Computer Engineering Department Drexel University USA Smart Grid Research and Development Pacific Northwest National Laboratory's (PNNL's) USA Transmission and Interconnection Planning Group Southern California Edison (SCE) Company USA EPRI's Power USA West Coast Operations Quanta Technology USA SmartCurrentssm Program Strategy DTE Energy Detroit MI USA

ISBN: (纸本)9781457710001

The effort of "Smart Grid" is to modernize grid infrastructure and build-in intelligence to power grids and delivery systems, and their interfaces to customer premises. However, the perspectives range from an emphasis on infrastructure to an emphasis on new paradigm-shifting applications. Alternatively, the smart grid can be thought of as the advanced information technologies that enable the desired analytical applications. As a general understanding, we believe that Smart Grid needs to integrate power system analysis, computing and economics to enhance grid reliability, efficiency, and security, and contributes to the climate change strategic goal. In this Supersession, the analytics that empowers smart grid applications is discussed;and the practical implementation and integration challenges will be presented.

关键词： Smart grid Analytical applications System integration Smart grids Systems Integration Power system analysis computing information technology DNA Integration integration INFRASTRUCTURE

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Applying systems thinking for realizing the mission of technology-based social ventures in Africa

Applying systems thinking for realizing the mission of techn...

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2010 ASEE Annual Conference and Exposition

作者： Stepler, Renee Garguilo, Steve Mehta, Khanjan Bilen, Sven College of Information Sciences and Technology Penn State University United States Information Technology Leadership Development Program Johnson and Johnson Inc. United States Electronic and Computer Services Department College of Engineering Penn State United States Department of Engineering Design Electrical Engineering and Aerospace Engineering School of Engineering Design Technology and Professional Programs Penn State United States

There are many university initiatives that focus on technology-based solutions to address the needs of marginalized communities. The technology-based solutions are intended to be economically and socially sustainable. These endeavors are usually well-meaning, creatively designed, and enthusiastically deployed, but do not achieve the sustainable impact envisioned at the outset of the projects. To addresses these shortcomings, at The Pennsylvania State University we are applying three key tenets of systems thinking to our humanitarian engineering and social entrepreneurial ventures: 1) employing regulation via feedback to ensure that the system is actually working;2) defining systems by their interactions and their parts;and 3) understanding that systems exhibit multi-finality. The concept of multi-finality refers to (designing) a system where the individual actors (inputs), the subsystems, and their interactions, all meet their own goals while the system as a whole also meets its goals. In this paper, we lay the framework for the application of specific systems thinking concepts to increase the probability of success of global development ventures. We provide simple yet compelling examples from two different ventures to illustrate the power of systems thinking to train innovative problem-solvers and increase the probability of success of technology-based social entrepreneurial ventures in Africa. © American Society for engineering Education, 2010.

关键词： Systems thinking

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Dynamical analysis of grasping with hand model for high quality product design

Dynamical analysis of grasping with hand model for high qual...

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作者： Hashimoto, Hiroshi Murakoshi, Hideki Sasaki, Akinori Ohyama, Yasuhiro Makino, Koji Yokota, Sho Master Program of Innovation for Design and Engineering Advanced Institute of Industrial Technology Tokyo Japan School of Computer Science Tokyo University of Technology Tokyo Japan Department of Mechanical Engineering Setsunan University Osaka Japan

ISBN: (纸本)9784907764364

Product design is an important process in industry whereas it has been usually performed based on aesthetics and static strength rather than on dynamical features of the product in use, or more specifically, in grasping. In this paper, dynamical analysis of grasping is to be discussed. Because it is difficult to deal with an actual hand dynamically interacting with an object, a hand model in dynamical simulation environment is used for the analysis. The hand model moves corresponding to a hand wearing a data glove. In the simulation, contact force vectors are calculated for each contact point between the hand model and the object to be grasped. © 2010 SICE.

关键词： Product design

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An efficient ICA approach based on neural network framework for biomedical applications

An efficient ICA approach based on neural network framework ...

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2010 6th IEEE World Congress on Computational Intelligence, WCCI 2010 - 2010 International Joint Conference on Neural Networks, IJCNN 2010

作者： Lin, Yue-Der Hsu, Chih-Yu Chen, Hung-Yun Tseng, Kuo-Kun Department of Automatic Control Engineering Master Program of Biomedical Informatics and Biomedical Engineering Feng Chia University Taichung Taiwan Department of Information and Communication Engineering Chaoyang University of Technology Wufeng Taichung County Taiwan Department of Automatic Control Engineering Feng Chia University Taichung Taiwan Department of Computer Science and Engineering HungKuang University Taichung Taiwan

ISBN: (纸本)9781424469178

The paper developed a block-wise approach for ICA algorithms which can improve the computational efficiency of ICA without the degradation of performance for the separation of biomedical signals. Source signals including electrocardiogram (ECG), electromyogram (EMG) and 60-Hz sinusoid are linearly mixed for experimental tests. The mean-square errors (MSE) between the original sources and the separated signals are calculated for the evaluation of separation performance. These results demonstrated that the proposed block-wise approach can achieve the desired separation performance of signals in a more efficient way. © 2010 IEEE.

关键词： Independent component analysis

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The effect of gender on support and self-efficacy in undergraduate engineering programs

The effect of gender on support and self-efficacy in undergr...

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2010 ASEE Annual Conference and Exposition

作者： Reisberg, Rachelle Bailey, Margaret Burger, Carol Hamann, Jerry Raelin, Joe Whitman, David Women in Engineering Program Northeastern University United States WE RIT Kate Gleason College of Engineering Rochester Institute of Technology United States Department of Computer Science University of Wyoming United States Program for Women and Girls HRD Division NSF United States College of Business Administration Department of Practice-Oriented Education Northeastern University United States Electrical and Computer Engineering Department University of Wyoming United States

This study is part of a larger research project, supported by a National Science Foundation Research on Gender in Science and engineering program grant, designed to determine the effect of self-efficacy and other factors on the retention of women in undergraduate engineering programs. These data represent the first wave of the study completed in the 2008-2009 academic year of sophomores in the colleges of engineering from four participating universities: Northeastern University, Rochester Institute of technology, Virginia Polytechnic Institute, and the University of Wyoming. The study examines the effect of gender on a range of contextual supports to explain three dimensions of self-efficacy: work, career, and academic within undergraduate engineering. Contextual support is defined as the institutional support provided to students through a number of mechanisms, such as financial aid, mentorship, and participation in living/learning communities. The analyses revealed some significant differences by gender. With the exception of academic self-efficacy, which is significantly higher among males, every other significant difference favors the female population. As freshmen, women are not as confident as men in their likelihood of achieving success in their engineering major. However, they were found to have higher career self-efficacy, in contrast to what has been reported in the literature, and benefit far more from mentorship. They also exceed the scores of their male counterparts in five support dimensions: they report receiving more support from professional clubs and associations;they are more involved in campus life;they take more advantage of living/learning communities;and they report that they not only receive more support from their friends but that their friends really matter to them. © American Society for engineering Education, 2010.

关键词： Professional aspects

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