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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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Evaluation of web based learning on student achievement in primary school computer courses

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Procedia - Social and Behavioral Sciences 2010年第2期2卷 5813-5819页

作者： Dilek Karahoca Adem Karahoca Ahmet Karaoglu Batuhan Gulluoglu Evren Arifoglu Software Engineering Department Bahcesehir University Turkey Information Technologies Graduate Program Bahçeşehir University Turkey

The purpose of this study is to investigate the effectiveness of web-based MS Power Point education on primary school students. Educational course material has been developed for web based learning environment. It has web based content of MS Power Point 2003 program. Also, quality of educational material is evaluated by taking into the account the ISO9241Usability of software standards. For this purpose, Xerox Usability Survey is conducted to the 83 primary school students. Statistical analysis shows that achievement of the students increased via the web based content.

关键词： Web based education web based learning usability software usability primary school education

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Partial response maximum likelihood sequence detector for a nonlinear magnetic recording channel

Partial response maximum likelihood sequence detector for a ...

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International Conference on System Science and engineering (ICSSE)

作者： Tsai-Sheng Kao Chiu-Hsiung Chen Sheng-Chih Chen Sheng-Yun Hou Yuan-Chang Chang Xsing-Bang Chou Department of Electronic Engineering Hwa-Hsia College of Technology and Commerce Taipei Taiwan Department of Computer Science and Information Engineering China University of Technology Hsinchu Taiwan Graduate Program of Digital Content and Technologies Chengchi University Taiwan

The nonlinear effects of partial erasure and transition shift, however, often limit the performance attained by the partial response maximum likelihood (PRML) detector because of model mismatch. Conventionally, the nonlinear effects are either ignored or approximated by linearization technique. In the article, a PRML detector for the PR4 model including the nonlinear effects has been developed to improve the detector performance. The new representation is more accurate and the corresponding PRML detector has better performance without increasing the realization complexity. Computer simulation results show that the new representation outperforms the conventional ones due to the enhanced modeling capability. The method is also expected to be applied in the high order partial response channel.

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A room modeling method for 3D video

A room modeling method for 3D video

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2008 International Conference on Parallel and Distributed Processing Techniques and Applications, PDPTA 2008

作者： Isshiki, Aya Sakamoto, Ryuuki Kitahara, Itaru Kogure, Kiyoshi Joe, Kazuki Information and Computer Sciences Department Nara Women's University Nara 630-8506 Japan Department of Computer and Communication Sciences Wakayama University Sakaedani 930 Wakayama Wakayama 640-8510 Japan Department of Intelligent Interaction Technologies Graduate School of Systems and Information Engineering University of Tsukuba Tennoudai 1-1-1 Tsukuba Ibaraki 305-8573 Japan ATR Knowledge Science Laboratories Hikaridai 2-2-2 Keihanna Science City Kyoto 619-0288 Japan

ISBN: (纸本)1601320841

This paper proposes a system to reconstruct the 3D shape model of background regions for generating 3D video easily. As the progress of computer vision technologies continues, many 3D video systems have been developed that tend to focus on automatic 3D reconstruction to capture target (foreground) objects. On the other hand, the 3D shapes of background regions such as walls and floors are generally made manually, for example, using 3D modeling software such as CAD. However, the operation is not easy for novices. Our system provides an easy background modeling method for such users. User operations include segmenting multiple background images into several boxes by indi cating their vertices and giving the correspondence of the boxes between multiple images. As a result, the 3D coordinates of the vertices are calculated using a stereo vision algorithm.

关键词： Stereo vision

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DLM: A distributed Large Memory System using remote memory swapping over cluster nodes

DLM: A distributed Large Memory System using remote memory s...

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IEEE International Conference on Cluster Computing

作者： Hiroko Midorikawa Motoyoshi Kurokawa Ryutaro Himeno Mitsuhisa Sato Department of Computer and Information Science Seikei University Musashino Tokyo Japan Graduate School of Systems and Information Engineering University of Tsukuba Tennodai Tsukuba Ibaraki Japan Advanced Center of Computing and Communication Wako Saitama Japan Research Program for Computational Science RIKEN Wako Saitama Japan

Emerging 64 bitOSpsilas supply a huge amount of memory address space that is essential for new applications using very large data. It is expected that the memory in connected nodes can be used to store swapped pages efficiently, especially in a dedicated cluster which has a high-speed network such as 10 GbE and Infiniband. In this paper, we propose the distributed large memory system (DLM), which provides very large virtual memory by using remote memory distributed over the nodes in a cluster. The performance of DLM programs using remote memory is compared to ordinary programs using local memory. The results of STREAM, NPB and Himeno benchmarks show that the DLM achieves better performance than other remote paging schemes using a block swap device to access remote memory. In addition to performance, DLM offers the advantages of easy availability and high portability, because it is a user-level software without the need for special hardware. To obtain high performance, the DLM can tune its parameters independently from kernel swap parameters. We also found that DLMpsilas independence of kernel swapping provides more stable behavior.

关键词： Kernel Arrays Memory management Servers Bandwidth Performance evaluation Benchmark testing

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Abstracts for the 6th Congress of Asian Sleep Research Society

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Sleep and Biological Rhythms 2009年第4期7卷 A1-A49页

作者： Seog Ju Kim In Kyoon Lyoo Yu-Jin Lee Do-Un Jeong Hirohiko Kanai Masanori Ookubo Atsushi Yoshimura Masako Okawa Noto Yamada Takeshi Munezawa Yoshitaka Kaneita Yoneatsu Osaki Hideyuki Kanda Tadahiro Ohtsu Masumi Minowa Kenji Suzuki Susumu Hijuchi Hiroyuki Suzuki Takashi Ohida Takashi Abe Yoko Komada Shoichi Asaoka Yuichi Inoue Jin-Seong Lee Sang-Yong Cho Deependra Kumar Hruda N. Mallick Velayudhan M. Kumar Mahesh K. Kaushik Akihiro Karashima Noiihiro Katayama Mitsuyuki Nakao Ravindra P. Nagendra Sathiamma Sulekha Sathyaprabha T. Narasappa Pradhan Nityanadan Bindu M. Kutty M. Nirmala P. N. Ravindra Basavaraj Ramappa Tubaki T. N. Sathyaprabha D. Sudhakar G. S. Lavekar C. R. Chandrashekar Kazuyoshi Kitaoka Mika Shimizu Sachiko Chikahisa Kazuo Yoshizaki Hiroyoshi Sei Jong-Won Kim Misa Takegami Shin Yamazaki Yasuaki Hayashino Rei Ono Koji Otani Miho Sekiguchi Shinichi Konno Shunichi Fukuhara Antonia J. Jakobson Paul Fitzgerald Russell Conduit Xin Shirley Li Siu Ping Joyce Lam Wai Man Mandy Yu Yun Kwok Wing Kazue Okamoto-Mizuno Koh Mizuno Mituaki Yamamoto Shuichiro Shirakawa Hirokazu Doi Mikako Kato Kazuyuki Shinohara Masako Tamaki Shiori Matsuda Katsuo Yamazaki Tadao Hori Keiko Ogawa Kazumi Takahashi Kunio Kitahama Katuo Yamazaki Yoshimasa Koyama Kohei Shioda Yugo Ueda Yukiko Nakamura Clara Inoue Kazushige Goto Sunao Uchida Yuko Morita Yoshiko Honda Tohru Kodama Mari Hagihara Toru Nakajima Masato Saito Yoshihiko Koga Shinichiro Tanaka Hiroshi Yamadera Madoka Takahara Sachiko Suwa Minoru Onozuka Sadao Sato Fumiharu Togo Taiki Komatsu Takeshi Mitani Jongbae Choi Bin Zhang Taeko Sasai Hiromi Mitsubayashi Mitsuhiro Ohtsu Isao Hasegawa Tatsuya Ishii Akira Komori Asami Suzuki Yue Nakahara Mitsuyasu Hiroki Mariko Nakauma Nobuo Someya Tomomasa Ochiai Shouhei Komori Rayleigh Ping-Ying Chiang Zai-Ting Yeh Seong T. Kim Seung H. Yoon Jeong S. Kwon Jong H. Choi Hyung J. Ahn Youngsoo Kim Bolortuya Yunren Lichao Chen Radhika Basheer Robert W. Mccarley Robert E. Strecker Makoto Honda Tetsuaki Arai Miyuki Fukazawa Yutaka Honda Kuniaki T Department of Psychiatry Gachon University of Medicine and Science Incheon Republic of Korea Department of Psychiatry Seoul National University Seoul Republic of Korea Department of Neuropsychiatry and Center for Sleep and Chronobiology Seoul National University Hospital Seoul Republic of Korea Department of Neuropsychiatry Seoul National University Hospital Seoul Republic of Korea Seoul National University Hospital Seoul Republic of Korea Department of Psychiatry Shiga University of Medical Science Otsu Japan Division of Public Health Department of Social Medicine Nihon University School of Medicine Tokyo Japan Department of Public Health Nihon University School of Medicine Tokyo Japan Division of Environmental and Preventive Medicine Department of Social Medicine Faculty of Medicine Tottori University Yonago Japan Department of Hygiene and Preventive Medicine Fukushima Medical University Fukushima Japan Department of Public Health Showa University School of Medicine Tokyo Japan Faculty of Humanities Seitoku University Matsudo Japan Section on Behavioral Science Division of Clinical Research National Hospital Organization Kurihama Alcoholism Center Yokosuka Japan Department of Otolaryngology Second Hospital Fujita Health University Nagoya Japan National Hospital Organization Kurihama Alcoholism Center Kanagawa Japan Metropolitan Police Department Criminal Investigation Laboratory Tokyo Japan Japan Somnology Center Neuropsychiatrie Research Institute Tokyo Japan Department of Somnology Tokyo Medical University Tokyo Japan Japan Somnology Center Neuropsychiatric Research Institute Tokyo Japan Department of Somnology Tokyo Medical and Dental University Tokyo Japan Center for Sleep and Chronobiology Department of Psychiatry and Behavioral Science Seoul National University College of Medicine Seoul Republic of Korea Department of Psychiatry and Behavioral Science Center for Sleep and Chronobiology Seoul Republic of Korea Department of Physiology Al

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Verilog Coding Style for Efficient Synthesis in FPGA

Verilog Coding Style for Efficient Synthesis in FPGA

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2005 International Conference on Computer Design, CDES'05

作者： Thapliyal, Himanshu Srinivas, M.B. Rao, Rameshwar Arabnia, Hamid R. Center for VLSI and Embedded System Technologies International Institute of Information Technology Hyderabad-500019 India Department of Electronics and Communication Engineering Osmania University Hyderabad 500 007 India University of Georgia Department of Computer Science 415 Graduate Studies Research Center Athens GA 30602-7404 United States

ISBN: (纸本)9781932415544

In this paper, we discuss efficient coding and design styles using Verilog from synthesis point of view. These techniques can be greatly helpful for any digital designer writing designs having speed and area considerations in his mind. Different important techniques have been addressed to enable the designer to write synthesizable codes. Apart from the synthesis, techniques are also discussed to improve the speed and area of netlist generated from the RTL codes. The prominent problem faced by the designer related to synthesis of Division and Modulus operator in FPGA has been discussed and an efficient solution has been provided.

关键词： Field programmable gate arrays (FPGA)

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Cinematized reality: Cinematographic camera controlling 3D free-viewpoint video

Cinematized reality: Cinematographic camera controlling 3D f...

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Visual Media Production, 2005. CVMP 2005. The 2nd IEE European Conference on

作者： Kitahara Sakamoto Satomi Tanaka Kogure ATR Intelligent Robotics and Communication Laboratories Keihanna Science City Kyoto Japan Department of Ingelligent Intaraction Technologies Graduate School of Systems and Information Engineering University of Tsukuba Tsukuba Ibaraki Japan Department of Knowledge Science Japan Advanced Institute of Science and Technology Nomi Ishikawa Japan

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The Social Affordances of the Internet for Networked Individualism

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Journal of Computer-Mediated communication 2006年第3期8卷

作者： Barry Wellman Anabel Quan-Haase Jeffrey Boase Wenhong Chen Keith Hampton Isabel Díaz Kakuko Miyata In 1965 moved from his Bronx High School of Science slide rule to IBM cards and an 029 keypunch in the bowels of Harvard University. Since then he's been primarily interested in the interplay between large-scale social processes and how people use technology to be connected at work and in the community. His NetLab research network is trying to get a handle on how the Internet fits into everyday life. Wellman founded the International Network for Social Network Analysis in 1976. He is a recent Chair of the Community section of the American Sociological Association has been nominated for the Chair of the Communication and Information Technology section of the ASA the Virtual Community focus area leader for SIGGROUP/ACM and a Executive Cmmittee member of the Association for Internet Researchers. Wellman's (co)edited books are: Social Structures: A Network Approach (2d ed CSPI 2003) Networks in the Global Village (Westview Press 1999) and The Internet in Everyday Life (Blackwell Publishers 2002). Address:Centre for Urban & Community Studies University of Toronto 455 Spadina Avenue Toronto Canada M5S 2G8. Fax: +1-416-978-7162 Address:Centre for Urban & Community Studies University of Toronto 455 Spadina Avenue Toronto M5S 2G8 Canada. Address:Massachusetts Institute of Technology 77 Mass. Ave. Room 9-522 Cambridge MA 02139. Address:IN3 Av. Tibidabo 47 08035 Barcelona Spain. Phone: +*** Fax: +***. Address:Department of Sociology Meiji Gakuin University 1-2-37 Shirokanedai Minato-ku Tokyo 108-8636 JAPAN. Phone: +81-3-5421-5565 Fax: +81-3-5421-5697. Doctoral student at the Faculty of Information Studies University of Toronto. She has been a Fellow of the Knowledge Media Design Institute and the McLuhan Program in Culture and Technology. Her articles address the nature of Internet-related social change for social integration and information flow. Her articles have examined the implications of these changes for communities and her thesis focuses on organizations. University of Toronto doctoral

We review the evidence from a number of surveys in which our NetLab has been involved about the extent to which the Internet is transforming or enhancing community. The studies show that the Internet is used for connectivity locally as well as globally, although the nature of its use varies in different countries. Internet use is adding on to other forms of communication, rather than replacing them. Internet use is reinforcing the pre-existing turn to societies in the developed world that are organized around networked individualism rather than group or local solidarities. The result has important implications for civic involvement.

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DCT and wavelet based image compression in satellite images

DCT and wavelet based image compression in satellite images

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International Conference on Recent Advances in Space technologies, RAST 2003

作者： Hacihaliloglul, Llker Karta, Mesut Satellite Communication and Remote Sensing Graduate Program Advanced Technologies in Engineering Informatics Institute Istanbul Technical University Maslak Istanbul34469 Turkey Electronic and Communication Department Faculty of Electrical and Electronic Engineering Istanbul Technical University Maslak Istanbul34469 Turkey

ISBN: (纸本)0780381424

Synthetic aperture radar (SAR) and SPOT images are becoming increasingly important and abundant in a variety of remote sensing and tactical applications. Thus, there is a strong interest in developing data encoding and decoding algorithms that can obtain higher compression ratios while keeping image quality to an acceptable level. This study aims to compare most of the well-known compression techniques namely discrete cosine transform and discrete wavelet transform. It investigates RADARSAT and SPOT images of different regions of different characteristics. RADARSAT-I fine and standard beam mode images of the different regions in Istanbul are used to test the performance of the compression algorithms. The regions, which have been investigated, were sea areas, forest areas, built environment - residential and industrial areas which define different patterns of urban land use. The studies showed that homogeneous areas like forest and sea gave better compression results compared to heterogeneous areas like industrial and environmental. The second purpose of this study is to compare the two compression algorithms. The discrete wavelet based algorithm gave much better results compared to the discrete cosine transform based algorithm. The results changed according to the quantization process and the transform coding algorithm. © 2003 IEEE.

关键词： Discrete wavelet transforms

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