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Comparison of maximum cross-correlation coefficient between blood pressure and heart rate with traditional index associated with baroreflex sensitivity

Comparison of maximum cross-correlation coefficient between ...

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Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)

作者： Norihiro Sugita Makoto Yoshizawa Makoto Abe Akira Tanaka Shigeru Chiba Tomoyuki Yambe Shin-ichi Nitta Department of Electrical and Communication Graduate School of Engineering Tohoku University Sendai Japan Research Division on Advanced Information Technology Cyberscience Center Tohoku University Sendai Japan Department of Human Support System Faculty of Symbiotic Systems Science Fukushima University Fukushima Japan Sharp Corporation Chiba Japan Institute of Development Aging and Cancer Tohoku University Sendai Japan

In general, it is difficult to compare biological reactions to some kind of stimulation among subjects on the basis of a single physiological parameter such as heart rate variability because there is a large individual variability in its values. A solution to this problem is to utilize the correlation between physiological parameters. In previous works, the maximum cross-correlation coefficient between heart rate and blood pressure variabilities changed when subjects were strongly affected by visual stimulation. In the present work, this index was compared with a traditional one associated with the arterial baroreflex gain to investigate the mechanism of the change in the index. Resting heart rate and continuous blood pressure of twenty-eight healthy adults were measured for five minutes and analyzed. The results showed that these two indices changed similarly to each other while there was little correlation in the mean value between them. Furthermore, the lag time from blood pressure variability to heart rate variability was inversely correlated with the traditional index.

关键词： Baroreflex Heart rate Blood pressure Correlation Indexes Physiology Sensitivity

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Stabilization of Nonlinear systems using Weak-Control-Lyapunov Functions

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IFAC Proceedings Volumes 2008年第2期41卷 6190-6195页

作者： Gou Nishida Takayuki Tsuzuki Hisakazu Nakamura Yuh Yamashita RIKEN(The Institute of Physical and Chemical Research) Bio-Mimetic Control Research Center Environment Adaptive Robotic Systems Lab. 2271-130 Anagahora Shimoshidami Moriyama-ku Nagoya Aichi 463-0003 Japan Department of Electronic and Control Systems Engineering Interdisciplinary Faculty of Science and Engineering Shimane University 1060 Nishikawatsu-cho Matsue-shi Shimane 690-8504 Japan Nara Institute of Science and Technology Systems and Control Lab. Graduate School of Information Science Takayama 8916-5 Ikoma Nara 630-0192 Japan Hokkaido University Graduate School of Information Science and Technology Division of Systems Science and Informatics Kita 13 Nishi 8 Kita-ku Sapporo 060-8628 Japan

This paper proposes a recursive method of constructing weak-control-Lyapunov functions for nonlinear systems. Lyapunov function is one of effective tools to study stability and stabilization in nonlinear system control design. However, a general way of finding Lyapunov functions has not been known yet. Our method is introduced by an explicit topological-geometric assumption for a state space manifold, called a Morse-Smale. The assumption indicates that there exists a sequence of inclusions of the manifold and its singular structures, called a weak-Lyapunov filtration. From this structure, we can construct a finite number of iterations to define weak-control-Lyapunov functions. As a result, the existence of the weak-control-Lyapunov functions can be specified by the investigation of property of manifolds.

关键词： Nonlinear systems Iterative modeling and control design

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State of the Climate in 2008

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BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY 2009年第8期90卷 S13-+页

作者： Peterson, T. C. Baringer, M. O. Thorne, P. W. Menne, M. J. Kennedy, J. J. Christy, J. Seidel, D. Mears, C. Haimberger, L. Wang, Junhong Zhang, L. Levinson, D. H. Hilburn, K. A. Kruk, M. C. Robinson, D. A. Foster, M. J. Ackerman, S. A. Bennartz, R. Heidinger, A. K. Maddux, B. C. Rossow, W. B. Macdonald, A. M. Fekete, B. M. Bowling, L. C. Lammers, R. B. Lawford, R. Allan, R. Wong, Takmeng Stackhouse, P. W., Jr. Kratz, D. P. Wilber, A. C. Schnell, R. C. Dlugokencky, E. J. Montzka, S. A. Elkins, J. W. Dutton, G. S. Haywood, J. Bellouin, N. Jones, A. Weber, M. Pelto, M. S. Belward, A. S. Bartholome, E. Achard, F. Brink, A. B. Gobron, N. Belward, A. S. Levy, J. M. Xue, Y. Reynolds, R. W. Johnson, G. C. Lyman, J. M. Willis, J. K. Levitus, S. Boyer, T. Antonov, J. Schmid, C. Goni, G. J. Yu, L. Weller, R. A. Goni, G. J. Knaff, J. A. Johnson, G. C. Lyman, J. M. Lumpkin, R. Goni, G. Dohan, K. Baringer, M. O. Meinen, C. S. Johnson, G. C. Kanzow, T. O. Cunningham, S. A. Johns, W. E. Beal, L. M. Hirschi, J. J. -M. Rayner, D. Longworth, H. R. Bryden, H. L. Marotzke, J. Merrifield, M. A. Nerem, R. S. Mitchum, G. T. Miller, L. Leuliette, E. Gill, S. Feely, R. A. Sabine, C. L. Feely, R. A. Wanninkhof, R. Takahashi, T. Behrenfeld, M. J. Siegel, D. A. O'Malley, R. T. Maritorena, S. Dickson, A. G. Feely, R. A. Dickson, A. G. Diamond, H. J. L'Heureux, M. Bell, G. Halpert, M. Bell, G. D. Blake, E. Goldenberg, S. B. Kimberlain, T. Landsea, C. W. Pasch, R. Schemm, J. Kruk, M. C. Levinson, D. H. Weyman, J. Camargo, S. J. Gleason, K. L. Kruk, M. C. Salinger, M. J. Trewin, B. Watkins, A. B. Luo, J. J. Richter-Menge, J. Overland, J. Wang, M. Walsh, J. Perovich, D. K. Meier, W. Nghiem, S. V. Walker, D. A. Bhatt, U. S. Raynolds, M. K. Comiso, J. E. Epstein, H. E. Jia, G. J. Romanovsky, V. Oberman, N. Drozdov, D. Malkova, G. Kholodov, A. Marchenko, S. Derksen, C. Brown, R. Wang, Lei Sharp, M. Wolken, G. Box, J. E. Bai, L. -S. Benson, R. Bhattacharya, I. Bromwich, D. H. Cappelen, J. Decker, D. DiGirolamo, N. Fettweis, X. Hall, D. Hanna, E. Mote, Universidad de Chile Santiago Chile Institute for Environment and Sustainability Joint Research Centre Ispra Italy Earth Sciences Centre University of Gothenburg Gothenburg Sweden Cimss University of Wisconsin-Madison Madison WI United States Center for Geophysical Research University of Costa Rica San José Costa Rica Met Office Hadley Centre Devon Exeter United Kingdom NOAA/NESDIS National Ocean Data Center Silver Spring MD United States Arctic and Antarctic Research Institute St. Petersburg Russian Federation Ministry of Agriculture and Land Reclamation Cairo Egypt DMH-DINAC/CTA-UCA Asunción Paraguay Byrd Polar Research Center Department of Geography The Ohio State University Columbus OH United States NOAA/NWS Honolulu HI United States NOAA/Atlantic Oceanographic and Meteorological Laboratory Physical Oceanography Division Miami FL United States Argentine Naval Hydrographic Service Buenos Aires Argentina Centro de Geofísica da Universidade de Lisboa Lisbon Portugal Rosenstiel School of Marine and Atmospheric Science Division of Meteorology and Physical Oceanography Miami FL United States Oregon State University Corvallis OR United States International Institute for Climate and Society Palisades NY United States Department of Atmospheric and Oceanic Sciences University of Wisconsin-Madison Madison WI United States Geophysical Institute University of Alaska-Fairbanks Fairbanks AK United States Instituto de Fisica Montevideo Uruguay German Meteorological Service Offenbach Germany NOAA/NWS/NCEP National Hurricane Center Miami FL United States Institute of Meteorology of Cuba La Habana Cuba Department of Agronomy Purdue University West Lafayette IN United States Climate Research Division Environment Canada Downsview ON Canada Ocean Observing and Climate Research Group National Oceanography Centre Southampton United Kingdom All-Russian Research Institute of Hydrological Information Obninsk Russian Federation Lamont Doherty Earth Observa

The global mean temperature in 2008 was slightly cooler than that in 2007; however, it still ranks within the 10 warmest years on record. Annual mean temperatures were generally well above average in South America, northern and southern Africa, Iceland, Europe, Russia, South Asia, and Australia. In contrast, an exceptional cold outbreak occurred during January across Eurasia and over southern European Russia and southern western Siberia. There has been a general increase in land-surface temperatures and in permafrost temperatures during the last several decades throughout the Arctic region, including increases of 1° to 2°C in the last 30 to 35 years in Russia. Record setting warm summer (JJA) air temperatures were observed throughout *** year 2008 was also characterized by heavy precipitation in a number of regions of northern South America, Africa, and South Asia. In contrast, a prolonged and intense drought occurred during most of 2008 in northern Argentina, Paraguay, Uruguay, and southern Brazil, causing severe impacts to agriculture and affecting many *** year began with a strong La Niña episode that ended in June. Eastward surface current anomalies in the tropical Pacific Ocean in early 2008 played a major role in adjusting the basin from strong La Niña conditions to ENSO-neutral conditions by July–August, followed by a return to La Niña conditions late in December. The La Niña conditions resulted in far-reaching anomalies such as a cooling in the central tropical Pacific, Arctic Ocean, and the regions extending from the Gulf of Alaska to the west coast of North America; changes in the sea surface salinity and heat content anomalies in the tropics; and total column water vapor, cloud cover, tropospheric temperature, and precipitation patterns typical of a La Niña. Anomalously salty ocean surface salinity values in climatologically drier locations and anomalously fresh values in rainier locations observed in recent years generally persisted

关键词： Storms

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Computer-Human Interaction - 8th Asia-Pacific Conference, APCHI 2008, Proceedings: Preface

Computer-Human Interaction - 8th Asia-Pacific Conference, AP...

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8th Asia-Pacific Conference on Computer-Human Interaction, APCHI 2008

作者： Lee, Seongil Choo, Hyunseung Ha, Sungdo Shin, In Chul Sungkyunkwan University Department of Systems Management Engineering 300 Chunchun-Dong Jangan-Gu Suwon 440-746 Korea Republic of Sungkyunkwan University School of Information and Communication Engineering 300 Chunchun-Dong Jangan-Gu Suwon 440-746 Korea Republic of Korea Institute of Science and Technology Intelligent System Research Division 39-1 Hawolgok-Dong Seongbuk-Gu Seoul 136-791 Korea Republic of Korea Agency for Digital Opportunity and Promotion Office of Digital Access Promotion 188 Gonghang-ro Gangseo-gu Seoul 157-715 Korea Republic of

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ISBN: (纸本)3540705848

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Preface: Marine and coastal applications in landscape ecology

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Landscape Ecology 2008年第SUPPL. 1期23卷 1-5页

作者： Hinchey, Elizabeth K. Nicholson, Matthew C. Zajac, Roman N. Irlandi, Elizabeth A. U.S. Environmental Protection Agency National Health and Environmental Effects Research Laboratory Atlantic Ecology Division Narragansett RI 02882 27 Tarzwell Dr United States Illinois-Indiana Sea Grant College Program Purdue University Chicago IL 60604 77 West Jackson Blvd. (G-17J) United States U.S. Environmental Protection Agency Environmental Information and Analysis Branch Environmental Assessment and Innovation Division Philadelphia PA 19103-2029 1650 Arch Street United States Graduate Program in Environmental Science Department of Biology and Environmental Science University of New Haven West Haven CT 06516 300 Boston Post Road United States Department of Marine and Environmental Systems Florida Institute of Technology Melbourne FL 32901 150 West University Boulevard United States

Landscape ecology traditionally has been limited to the study of terrestrial systems;however, the questions and methods defining the science are equally relevant for marine and coastal systems. The reciprocal relationship between spatial pattern and ecological processes and the overarching effect of scale on this relationship was being explored in some marine and coastal settings as the general discipline of landscape ecology was evolving throughout the latter two decades of the last century. As with all components of the biosphere, an understanding of these relationships is critical for successful management of marine and coastal systems. In these systems, widely dispersed field or ship-based observations and lack of broad scale data have historically precluded quantification of large-scale patterns and processes and hindered management efforts. However, relatively recent advances in geographic information systems, remote sensing and computer technologies have begun to address these issues and are now permitting assessments of pattern and process in oceans. The intent of this special issue is to highlight research that is adapting the tools of landscape ecology to answer ecological questions within marine and coastal systems, to address the unique challenges faced in these landscapes, and to stimulate an exchange of ideas and solutions to common problems. Inspiration for this special issue of Landscape Ecology began with a special session on "Marine and Coastal Applications in Landscape Ecology" that was held at the 19th Annual Symposium of the United States Regional Association of the International Association for Landscape Ecology, March 31-April 2, 2004 in Las Vegas, Nevada. © 2007 Springer science+Business Media B.V.

关键词： Benthic landscapes Habitat fragmentation Landscape ecology Larval dispersal Marine coral reef reserves Polychaete species diversity Reef fish communities Seagrass landscape pattern Sediment metal concentrations

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Extended dominance condition for schur stability of real polynomials

IEEJ Transactions on Electronics, Information and Systems

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IEEJ Transactions on Electronics, information and systems 2007年第8期127卷 1270-1271页

作者： Mori, Takehiro Kokame, Ideki Division of Information Science Kyoto Institute of Technology Matsugasaki Kyoto 606-8585 Japan Department of Electrical and Information Systems Osaka Prefecture University Gakuencho Sakai 599-8531 Japan

A known sufficient condition called "dominance condition" for Schur stability of real polynomials is extended in such a way that the equality is allowed in the inequality relation of the original condition. It is pointed out that two extra inequalities are needed for the extended condition to remain intact, being still a simple sufficient condition for stability of the polynomials. Some cases where the original dominance condition is also a necessary one are identified.

关键词： Polynomials

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Uppsala center for wireless sensor networks (WISENET)

Uppsala center for wireless sensor networks (WISENET)

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Smart systems Integration 2007 - European Conference and Exhibition on Integration Issues of Miniaturized systems: MEMS, MOEMS, ICs and Electronic Components, SSI 2007

作者： Ahlen, Anders Ahlgren, Bengt Gronroos, Roland Gunningberg, Per Hjort, Klas Katardjiev, Ilia Rohner, Christian Rydberg, Anders Voigt, Thiemo Division Signals and Systems Uppsala University Kista Sweden Department of Information Technology Uppsala University Kista Sweden Division Materials Science Uppsala University Kista Sweden Division Solid State Electronics Uppsala University Kista Sweden SICS Swedish Institute of Computer Science Kista Sweden

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A master-worker type eigensolver for molecular orbital computations

A master-worker type eigensolver for molecular orbital compu...

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8th International Workshop on Applied Parallel Computing, PARA 2006

作者： Sakurai, Tetsuya Kodaki, Yoshihisa Tadano, Hiroto Umeda, Hiroaki Inadomi, Yuichi Watanabe, Toshio Nagashima, Umpei Department of Computer Science University of Tsukuba Tsukuba 305-8573 Japan Graduate School of Systems and Information Engineering University of Tsukuba Tsukuba 305-8573 Japan Core Research for Evolutional Science and Technology Japan Science and Technology Agency Japan Computational Science Research Division National Institute of Advanced Industrial Science and Technology Computing and Communications Center Kyushu University Fukuoka 812-8581 Japan

ISBN: (纸本)9783540757542

We consider a parallel method for solving generalized eigen-value problems that arise from molecular orbital computations. We use a moment-based method that finds several eigenvalues and their corresponding eigenvectors in a given domain, which is suitable for master-worker type parallel programming models. The computation of eigen-values using explicit moments is sometimes numerically unstable. We show that a Rayleigh-Ritz procedure can be used to avoid the use of explicit moments. As a test problem, we use the matrices that arise in the calculation of molecular orbitals. We report the performance of the application of the proposed method with several PC clusters connected through a hybrid MPI and GridRPC system. © Springer-Verlag Berlin Heidelberg 2007.

关键词： Computation theory

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Evaluation of guidance system for visually disabled

Evaluation of guidance system for visually disabled

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14th World Congress on Intelligent Transport systems, ITS 2007

作者： Fukasawa, Noriko Mizukami, Naoki Railway Technical Research Institute Passenger Information Systems Transport Information Technology Division 2-8-38 Hikari-cho Kokubunji-shi Tokyo 185-8540 Japan Railway Technical Research Institute Ergonomics Human Science Division 2-8-38 Hikari-cho Kokubunji-shi Tokyo 185-8540 Japan

ISBN: (纸本)9781617387777

We are carrying our researches on various guidance systems to be used by aged and/ordisabled passengers when they utilize railways. This paper describes the design and implementation of a guidance system for visually disabled, which is one of the materialized solutions based on our study result. We have carried out a field test to evaluate the system at some stations in urban area. The results of the test have shown that the system is effective enough to be able to support visually disabled with absolutely no vision even when they walk in places where they have never been before.

关键词： Remote control

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IMPROVED CONTINUATION METHOD CONTROLLER FOR PWM systems: AN EXPERIMENTAL CASE STUDY

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Asian Journal of Control 2008年第1期1卷

作者： T. Iwata M. Yamakita K. Furuta Dept. of Mechanical and Environment Informatics Tokyo Institute of Technology. Takaaki Iwata received the BE degrees in Mechanical Engineering in 1990 from Waseda University Japan. From 1990 to 1996 he jointed NOK Co. Ltd. In 1996 he received his ME degrees in Mechanical and Environmental Informatics from Tokyo Institute of Technology. He is currently a PhD student of Tokyo Institute of Technology. He is a member of SICE RSJ JSME and IEEE. Dept. of Control and Systems Engineering Tokyo Institute of Technology. Masaki Yamakita received Be ME and PhD from Tokyo Institute of Technology in 1984 1986 and 1989 respectively. From 1989 he was a Research Associate in the Department of Control Engineering of Tokyo Institute of Technology and from 1993 he was a Lecturer at Tokyohashi University of Technology. He is currently an Associate Professor in the Department of Control and Systems Engineering of Tokyo Institute of Technology. His research interests include robotics learning control robust control and non-linear control. Katsuhisa Furuta was born in Tokyo Japan in 1940. He received his B.S. M.S. and Ph.D. degrees in Chemical Engineering from Tokyo Institute of Technology in 1962 1964 and 1967 respectively. Since 1967 he has been a teaching staff of Tokyo Institute of Technology where he is currently a Professor of Graduate School of Information Science and Engineering. He is a fellow of IEEE and SICE. He is now a member of Science Council of Japan the secretary of the engineering division a council member of IFAC and the President of SICE in 1999.

In this paper, an improved version of online continuation method controller for PWM systems is presented. The online continuation method controller solves the PWM-type deadbeat control problem numerically. By using this algorithm, iterations for solving the set of nonlinear equations always start from a good solution candidate and therefore it can be used online. The original continuation method is modified so that it is applicable to real systems. The validity of the proposed control method is demonstrated by a laboratory-scale flexible arm manipulator.

关键词： PWM continuation method homotopy deadbeat GPC

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