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

作者： Hyo-Seon Jeon Jonghee Han Won-Jin Yi BeomSeok Jeon Kwang Suk Park Interdisciplinary Program in Medical and Biological Engineering Graduate School Seoul National University South Korea Department of Oral and Maxillofacial Radiology College College of Dentistry Seoul National University South Korea Department of Neurology Seoul National University South Korea Department of Biomedical Engineering College of Medicine Seoul National University South Korea

The purpose of this paper is the classification of Spatial-Temporal Image of Plantar pressure (STIP) among normal step and the patients step of Parkinson disease. For this, we created a new image data, STIP, that have information of the change of plantar pressure during heel to toe motion (i.e., contain spatial and temporal information for plantar pressure). To get STIP, the walking of 21 patients with Parkinson disease and 17 age-matched healthy subjects were recorded and analyzed using in-shoe dynamic pressure measuring system with comfort walking. For feature extraction of gait, we applied Principal component analysis (PCA) to STIP and calculated weights of STIP on each principal components. Then, we build hard margin Support Vector Machine (SVM) classifier for gait recognition and test of generalization performance using normalized weights on PCs of STIP. SVM result indicated an overall accuracy of 91.73% by the RBF(Radial Basis Function) kernel function. These results demonstrate considerable potential in applying SVMs in gait classification for many applications.

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Activity energy expenditure assessment system based on activity classification using multi-site triaxial accelerometers

Activity energy expenditure assessment system based on activ...

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29th Annual International Conference of IEEE-EMBS, engineering in Medicine and Biology Society, EMBC'07

作者： Kim, Dongwoo Kim, Hee Chan Interdisciplinary Program Graduate School Seoul National University Seoul Korea Republic of Department of Biomedical Engineering College of Medicine Seoul National University Seoul Korea Republic of

ISBN: (纸本)1424407885

Wireless networked multisite triaxial accelerometry system was proposed to estimate activity energy expenditure during daily life. Proposed system used different estimation algorithms according to activity classification based on measured acceleration signals. The estimation results showed higher correlation (R2 = 0.98) and smaller standard errors of estimation (SEE = 0.66 kcal) than any other system in preceding reports. © 2007 IEEE.

关键词： biomedical engineering

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Implementation of the relay server for the Ubiquitous Integrated Biotelemetry System for Emergency Care (UIBSEC) based on 3.5G HSDPA technology

Implementation of the relay server for the Ubiquitous Integr...

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29th Annual International Conference of IEEE-EMBS, engineering in Medicine and Biology Society, EMBC'07

作者： Min, Yang Jung Jaemin, Kang Il, Hyung Shin Yoonseo, Koo Gil, Joon Suh Hee, Chan Kim Interdisciplinary Program Graduate School Seoul National University Seoul Korea Republic of Department of Emergency Medicine Seoul National University Seoul Korea Republic of Department of Biomedical Engineering Institute of Medical and Biological Engineering Seoul National University Seoul Korea Republic of

ISBN: (纸本)1424407885

When an emergent case occurs, to give proper and immediate emergency treatment to a patient is as important as to transfer him or her to the hospital as early as possible. For this circumstance where first aid usually happens in an ambulance, we developed the Ubiquitous Integrated Biotelemetry System for Emergency Care (UIBSEC) based on wireless 3.5G HSDPA module in order to provide more proper and active medical care to a patient. For this system we performed experimental tests on the HSDPA module to measure practical performance values with respect to throughput and RTT (round-trip-time) and compared the result with the theoretical specifications. In the course of developing this system we created the C#-based Network Solution Library (NSL) which helps drastically reducing the overhead. We applied this library to components of the UIBSEC - two kinds of clients and one central server - and confirmed that it works smoothly in wireless networks and it is useful in the future development process of network applications. © 2007 IEEE.

关键词： Servers

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Noninvasive heart rate variability analysis using loadcell-installed bed during sleep

Noninvasive heart rate variability analysis using loadcell-i...

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29th Annual International Conference of IEEE-EMBS, engineering in Medicine and Biology Society, EMBC'07

作者： Chung, Gih Sung Choi, Byoung Hoon Jeong, Do-Un Park, Kwang Suk Interdisciplinary Program in Medical and Biological Engineering Seoul National University Graduate School Korea Republic of Dept. of Neuropsychiatry College of Medicine and Hospital Seoul National University Korea Republic of Department of Biomedical Engineering College of Medicine Seoul National University Korea Republic of

ISBN: (纸本)1424407885

Polysomnography is the standard method to score the sleep stages or to determine the quality of sleep. During all night examination, subjects must attach complicate and numerous electrodes on their body to acquire the biosignals. They can influence participants' sleep stage transition or sleep pattern, and the method seems intricate. In many researches, it is reported that autonomic nervous system (ANS) is varying with sleep stage transition and heart rate variability (HRV) is one of the indices which reflects the changes of autonomic nervous system. In this point of view, we can estimate the sleep quality by observing the HRV variation. In this study, to analyze the heart rate variability, we introduce a new system that can detect the heart beats of subjects during sleep by using bed installed load-cell sensors. The pressure to the sensor changes with the pulsation of the heart and we consider it as ballistocardiogram, the physical heart beat signal. To validate our system, we adopted this system for the 4 subjects with the polysomnography. The results show the LF/HF ratio of the heart rate, one of the reflection parameters of ANS, acquired from the system for each sleep stage. To validate the results, the HRV from electrocardiogram using Ag-AgCl electrodes will be compared. © 2007 IEEE.

关键词： biomedical engineering

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Segmentation of solid nodules in ultrasonographic breast image based on wavelet transform

Segmentation of solid nodules in ultrasonographic breast ima...

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29th Annual International Conference of IEEE-EMBS, engineering in Medicine and Biology Society, EMBC'07

作者： Park, Sangyun Kong, Hyoun-Joong Moon, Woo Kyoung Kim, Hee Chan Interdisciplinary Program Graduate School Seoul National University Seoul Korea Republic of Department of Radiology Seoul National University Seoul 110-744 Korea Republic of Department of Biomedical Engineering College of Medicine and Institute of Medical and Biological Engineering Seoul National University Seoul Korea Republic of

ISBN: (纸本)1424407885

An accurate segmentation of solid nodules in ultrasonographic (US) breast image is presented. 1-level 2-dimensional Discrete Wavelet Transform (DWT) is used to create features reflecting the texture information of the original image. Using these features, the texture classification is achieved. Finally, solid nodule region is segmented from the classified texture region. Proper threshold for texture classification is automatically decided. Empirically acquired information about the relationship between the texture characteristic of the original image and the optimal threshold is examined and used. Presented algorithm is applied to 284 malignant solid nodules and 300 benign solid nodules and the resulting images are presented. © 2007 IEEE.

关键词： Ultrasonography

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The relationship between HRV parameters and stressful driving situation in the real road

The relationship between HRV parameters and stressful drivin...

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IEEE EMBS International Conference on Information Technology Applications in Biomedicine (ITAB)

作者： Haet Bit Lee Jung Soo Kim Yun Seong Kim Hyun Jae Baek Myung Suk Ryu Kwang Suk Park Seoul National University South Korea Interdisciplinary Program in Medical and Biological Engineering Graduate School Republic of Korea Advanced Biometric Research Center Republic of Korea Department of Biomedical Engineering Seoul National University Republic of Korea

The aim of this paper is to find a relation between HRV parameters of ECG and stressful driving situation in the real road through various tests. First, we gave a stress to the subject by increasing the driving speed using driving simulator in the laboratory. Second, the subject drove the vehicle on the real road. Through let him drove in the busy narrow street, we evoked stress. ECG and PPG signal was recorded from steering wheel and back cushion each unconsciously. The driving experiment with simulator was not suitable to reproduce actual traffic condition because the adaptation was occurred. On the other hand, in real driving test, the results show that the heart rate is increase, and SDNN, RMSSD, pNN50 were decreased. The heart rate is the strongest indicator and other parameters tend to be changed depend on a personal. The blood pressure had no significant changes. Our results show the good possibility of that the time parameters of the HRV could be used as an instantaneous stress indicator.

关键词： Heart rate variability Stress Electrocardiography Testing Heart rate Laboratories Road vehicles Wheels Traffic control Blood pressure

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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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Blank slate engineering at Florida Gulf Coast University - Innovative and multidisciplinary from the ground up

Blank slate engineering at Florida Gulf Coast University - I...

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113th Annual ASEE Conference and Exposition, 2006

作者： Blanchard, Susan Egiebor, Nosa Sweeney, James Zidek, Lisa Sechrist, Chalmers Hulbert, Sam Osborn, James O'Neill, Robert Florida Gulf Coast University United States FGCU School of Engineering Institute of Electrical and Electronics Engineers Biomedical Engineering Society American Institute for Medical and Biological Engineering United Kingdom Department of Environmental and Civil Engineering Arizona State University United States Department of Bioengineering Department of Bioengineering Arizona State University United States Flinn Foundation Funded Multi- and Interdisciplinary Graduate Training Program in Bioengineering Milwaukee School of Engineering United States Graduate Programs Industrial Engineering Program Department of Electrical and Computer Engineering Department of Engineering University of Illinois Urbana-Champaign United States Institute of Electrical and Electronics Engineers Rose-Hulman Institute for Technology School of Engineering FGCU School of Engineering's Advisory Board Roger Williams University United States Department of Civil Engineering Department of Engineering Roger Williams University United States

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Artificial neural network-based estimation of the eyeball position using the magnetic contact lens sensing technique

Artificial neural network-based estimation of the eyeball po...

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2005 27th Annual International Conference of the engineering in Medicine and Biology Society, IEEE-EMBS 2005

作者： Lee, Seung Yup Kim, Keun Young Kim, Hee Chan Interdisciplinary Program-Biomedical Engineering Major Graduate School Seoul National University Seoul Korea Republic of Department of Biomedical Engineering College of Medicine Seoul National University Seoul Korea Republic of

ISBN: (纸本)0780387406

We have created an artificial neural network based approach for measuring eye movement using a magnetic contact lens sensing technique. The sensor array is based on using four magnetoresistive sensors. A two-layer feed-forward artificial neural network was used and an artificial eyeball model was made for the test. The neural network is trained with sample data obtained from nine spots. After training, we compared the position calculated from the developed system with the real one. The result shows that there is a good linear relationship between them. This indicates the developed system is capable of recording the position of the eyeball with a high degree of accuracy. © 2005 IEEE.

关键词： Contact lenses

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An wearable energy expenditure analysis system based on the 15-channel whole-body segment acceleration measurement

An wearable energy expenditure analysis system based on the ...

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2005 27th Annual International Conference of the engineering in Medicine and Biology Society, IEEE-EMBS 2005

作者： Yongwon, Jang Jung, M.W. Jaemin, Kang Hee, Chan Kim Interdisciplinary Program Graduate School Seoul National University Seoul Korea Republic of Department of Biomedical Engineering College of Medicine Seoul National University Seoul Korea Republic of Institute of Medical and Biological Engineering Medical Research Center Seoul National University Seoul Korea Republic of

ISBN: (纸本)0780387406

The measurement of the amount of energy utilized during physical activity has generated considerable interests from various groups ranging from exercise physiologists to nutritionists and fitness center workers. To date, however, the existing energy expenditure estimation methods are not so reliable and compact. In this paper, we propose a new method for accurately and easily estimating energy expenditure during physical activity with a novel algorithm. This method involves acquiring acceleration signals through a 15-channel whole-body segment acceleration measurement system and then estimating the calories expended using a newly developed algorithm. The results of 3 subjects' experiments were compared with a commercially available mask type indirect calorimeter and a 9-axis accelerometry-based calorimeter. The results demonstrate that the proposed method provides a new and reliable way to estimate human energy expenditure during physical activity. © 2005 IEEE.

关键词： Nutrition

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