Shape Modeling Laboratory

Daming Wei Professor	Wenxi Chen Associate Professor	Xin Zhu Special Researcher	Zhang Bofeng Visiting Researcher

Recent research activities in the Shape Modeling Lab have been extended to more interdisciplinary fields with emphasis on information technology and healthcare. For Prof. Wei, AY 2006 is the second year of the Grand-in-Aid for Scientific Research (No. 17500194) aimed in developing a Virtual reality and computer simulation of catheter-base Electrophysiology Study. Other research topics of Prof. Wei included heart modeling and computer simulation and visualization based on medical images, telemonitoring for distant diagnosis and telehealth, biomedical data processing include the brain-computer interface. Prof. Chens research activity was focused on biomedical measurement and information processing with topics including Application of mobile phone in daily healthcare BREW implementation of a mobile phone based monitor for women healthcare Development of a mobile phone based beat-by-beat sphygmomanometer Development of a body temperature monitor based on near field communication technology (FeliCa) and a mobile phone Hidden Markov model based menstrual cycle estimation using body temperature measured during sleep An Internet-based system for automatic monitoring of heart/respiration rates during sleep Development of a pillow-type sensor unit for heart/respiration rates monitoring during sleep Development of a netbox for multiple vital signs collection via Internet Implementation of HRV analysis based on an Internet server

Refereed Journal Papers

[dm-wei-01:2006]	Shuxue Ding, Jie Huang, Daming Wei, and Andrzej Cichocki. A Near Real-Time Approach for Convolutive Blind source Separation. IEEE Transactions on Circuits and Systems, 53(1):114-128, 2006.
[dm-wei-02:2006]	Hui Wang, Minyi Guo, and Daming Wei. Message Scheduling for Irregular Data Redistribution in Parallelizing Compilers. IEICE Transactions on Information and Systems, E89-D(2):418-424, 2006.
[dm-wei-03:2006]	Xin Zhu and Daming Wei. Computer simulation of intracardiac potential with whole-heart model. , Int. J. Bioinformatics Research and Applications, 3(1):100-122, 2007.
[dm-wei-04:2006]	Xin Zhu, Wenxi Chen, Tetsu Nemoto, Yumi Kanemitsu, Kei ichiro Kitamura, Ken ichi Yamakoshi, , and Daming Wei. Real-time monitoring of respiration rhythm and pulse rate during sleep. IEEE Transactions on Biomedical Engineering, 53(12):1553-1563, 2006.
[wenxi-01:2006]	Tatsuki Toda, Tomoko Okashita, Takeshi Maekawa, Bin Abdul Adzis Kee Alfian, Mohd Kushairi Mohd Rajuddin, Ryota Nakajima, Wenxi Chen, Kunio Takahashi, Bin Haji Ross Othman, and Makoto Terazaki. Community Structures of Coral Reefs around Peninsular Malaysia. Journal of Oceanography, 63(1):113-123, 2007.
	Coral community structures at eleven fringing reef sites were investigated along the coast of Peninsular Malaysia. Estimated coverage of coral communities is examined by applying quantitative digital image analysis to the line transect method. Four coral community types were characterized by dominant genera and lifeforms: Acropora branching community, Montipora- Acropora community, Porites massive community, and Heliopora community. Live coral coverage in all study sites ranged from 17.9% to 68.6%. Most reefs were in �hfair�h condition while some reefs were shown to be in �hpoor�h condition. Coral community structures among the study sites were divided into the west coast of Peninsular Malaysia with a dominant Porites massive lifeform, and the east coast with a variety of lifeform categories of Montipora and Acropora. Physical effects such as the monsoon wind regime and sedimentation are likely to influence the formation of dominant coral communities around Peninsular Malaysia.
[wenxi-02:2006]	Tetsu Nemoto Yumi Kanemitsu Keiichiro Kitamura Kenichi Yamakoshi Xin Zhu, Wenxi Chen and Daming Wei. Real-Time Monitoring of Respiration Rhythm and Pulse Rate During Sleep. IEEE Transaction on Biomedical Engineering, 53(12):2553-2563, 12 2006.
	A real-time noninvasive and unconstrained method is proposed to detect the respiration rhythm and pulse rate during sleeping. By employing the trous algorithm of the wavelet transformation (WT), the respiration rhythm and pulse rate can be monitored in real-time from a pressure signal acquired by a pressure sensor plated under a pillow. The waveform for respiration rhythm detection is derived from the WT 2(6) scale approximation, while the waveform for the pulse rate detection is synthesized by the combination of WT 2(4) and 2(5) scale details. In order to minimize the algorithmic latency in data processing and realize the highest real-time performance, the respiration rhythm and pulse rate estimations are performed by using the waveforms directly derived from the WT approximation and detail components without reconstruction procedures. This method is evaluated with about 24 hours�f data collected from 13 healthy male and female college students. By comparing with reference data from finger photoelectric plethysmogram for the pulse rate detection, the sensitivity and positive predictivity in average are 99.00% and 98.54%, respectively. Similar outcomes for the respiration rhythm are 95.45% and 95.13%, respectively. This study suggests that the proposed method is promising as a heart rate and respiration rhythm monitor during sleeping for the real-time monitoring of sleep apnea syndrome as well as sudden death syndrome.
[wenxi-03:2006]	Kenji Suzuki Hirokuni Iwasa Wenxi Chen Toshio Kobayashi Takuya Akaishi, Takayuki Nakagawa. Development of a Shape Evaluation Method and its Application for 4 Years in Chinese Yam using Image Analyses - Shape Succession in Vegetative Reproduction -. Journal of the Japanese Society for Horticultural Science, 5(3):325-329, 2006.
	Chinese Yam is produced by vegetative reproduction and the tubers inherit the genetic shape-traits of the seed tubers. Shape is an important factor affecting commercial classification and price, and is thus the target of breeding and culture selection. Since market prices are vigorously dependent on shape, easy and accurate analyzing systems have been developed using 3-D image analyses. A modified method of obtaining image data using the known cube model was carried out, and the accuracy of the values was calibrated. Consequently, simple and quantitative shape classification and evaluation methods using 4 different techniques were applied, and satisfactory results were obtained after comparison with logistic regression analyses.
[zhuxin-01:2006]	Xin Zhu, Wenxi Chen, Tetsu Nemoto, Yumi Kanemitsu, Kei ichiro Kitamura, Ken ich Yamakoshi, and Daming Wei. Real-time monitoring of respiration rhythm and pulse rate during sleep. IEEE Transactions on Biomedical Engineering, 53(12):2553-63, December 2006.
	A noninvasive and unconstrained real-time method to detect the respiration rhythm and pulse rate during sleep is presented. By employing the trous algorithm of the wavelet transformation (WT), the respiration rhythm and pulse rate can be monitored in real-time from a pressure signal acquired with a pressure sensor placed under a pillow. The waveform for respiration rhythm detection is derived from the 26 scale approximation, while that for pulse rate detection is synthesized by combining the 24 and 25 scale details. To minimize the latency in data processing and realize the highest real-time performance, the respiration rhythm and pulse rate are estimated by using waveforms directly derived from the WT approximation and detail components without the reconstruction procedure. This method is evaluated with data collected from 13 healthy subjects. By comparing with detections from finger photoelectric plethysmograms used for pulse rate detection, the sensitivity and positive predictivity were 99.17% and 98.53%, respectively. Similarly, for respiration rhythm, compared with detections from nasal thermistor signals, results were 95.63% and 95.42%, respectively. This study suggests that the proposed method is promising to be used in a respiration rhythm and pulse rate monitor for real-time monitoring of sleep-related diseases during sleep.
[zhuxin-02:2006]	Xin Zhu and Daming Wei. Computer simulation of intracardiac potential with whole-heart model. International Journal of Bioinformatics Research and Applications, 3(1):100-122, 2006.
	Computer simulation of intracardiac potentials was performed based on a whole-heart model, emphasising applications to lectrophysiology Study (EPS) and catheter ablation. A numerical method was proposed based on a volume conductor model with multiple interfaces and piecewise homogeneity. A model of normal heart and a model of Wolff-Parkinson-White (WPW)Syndrome with a right free-wall Accessory Pathway (AP) were employed to simulate intracardiac electrograms. The study was validated by comparing the simulated electrograms with those in catheter-based EPS and ablations.Applying whole-heart modelling to the EPS and ablation is regarded as a new direction of electrocardiologic forward problem.

Refereed Proceeding Papers

[dm-wei-06:2006]	Wenxi Chen, Daming Wei, Xin Zhu, M. Uchida, Shuxue Ding, Michael Cohen, S. Tokinoya, and N.Takeda. A mobile phone-based wearable vital signs monitoring system. In Ning Gu, D Wei, Z Xie, Hui Wang, S X Wang, and B Shi, editors, The Fifth International Conference on Computer and Information Technology, page 950' 955, Shanghai, China,, Sep. 2005. CIT 2005, The IEEE Computer Society.
[dm-wei-07:2006]	Jian Liu, Takehito Kanno, Masanori Akashi, Wenxi Chen, Daming Wei, and Gengfeng Wu. Patterns of Bipedal Walking on Triaxial Acceleration Signals and Their Use in Identifying Falling Risk of Older People. In Chang-Sung Jeong, Incheon Paik, Sunshin An, and Daming Wei, editors, IEEE Sixth International Conference on Computer and Information Technology, page CD room, Seoul, Korea, September 2006. IEEE CIT 2006, The IEEE Computer Society.
[dm-wei-08:2006]	Kazuaki Yamauchi, Wenxi Chen, and Daming Wei. An Intensive Survey of 3G Mobile Phone Technologies and Applications in Japan. In Chang-Sung Jeong, Incheon Paik, Sunshin An, and Daming Wei, editors, IEEE Sixth International Conference on Computer and Information Technology, page CD room, Seoul, Korea, September 2006. IEEE CIT 2006, The IEEE Computer Society.
[dm-wei-09:2006]	Toshiyuki Sakamoto, Hui Wang, and Daming Wei. Performance Evaluation of Twelve-Lead Electrocardiogram Telemonitor Utilizing 3G Cellular Phone. In Chang-Sung Jeong, Incheon Paik, Sunshin An, and Daming Wei, editors, IEEE Sixth International Conference on Computer and Information Technology, page CD room, Seoul, Korea, September 2006. IEEE CIT 2006, The IEEE Computer Society.
[dm-wei-10:2006]	Zhaomin Zhang and Daming Wei. A New ECG Identification Method Using Bayes theorem. In Proceedings of the 2006 IEEE Region 10 Conference, page CD room, Hongkong, China, November 2006. IEEE Region 10, IEEE.
[dm-wei-11:2006]	Motoki Sakai, Hiroyuki Ishita, Yuuki Ohshiba, Wenxi Chen, and Daming Wei. P300 Detection for Brain-Computer Interface from Electroencephalogram Contaminated by Electrooculogram. In Chang-Sung Jeong, Incheon Paik, Sunshin An, and Daming Wei, editors, IEEE Sixth International Conference on Computer and Information Technology, page CD room, Seoul, Korea, September 2006. IEEE CIT 2006, The IEEE Computer Society.
[wenxi-04:2006]	Yuuki Ohshiba Wenxi Chen Daining Wei Motoki Sakai, Hiroyuki Ishita. P300 Detection for Brain-Computer Interface from Electroencephalogram Contaminated by Electrooculogram. In Proc. of the 6th IEEE International Conference on Computer and Information Technology, 2006.
	This paper proposed a method to eliminate EOG artifact in order to detect P300 from measured EEG effectively. This method utilized an algorithm based-upon wavelet transformation and normalized averaging approach. It was verified using EEG collected from 6 healthy male students. The result showed that it was possible to estimate P300 from recovered EEG data which was contaminated by EOG in each trial. It suggested the effectiveness and possibility of applying the P300 derived from EEG data, even when it was contaminated by EOG during trials.
[wenxi-05:2006]	Daming Wei Kazuaki Yamauchi, Wenxi Chen. An Intensive Survey of 3G Mobile Phone Technologies and Applications in Japan. In Proc. of the 6th IEEE International Conference on Computer and Information Technology, 2006.
	In this paper, we review current innovative technologies and applications of 3G mobile phones in Japan. Mobile phones are the backbone of mobile communications and have experienced explosive growth. Generations of mobile phones are divided into three as of today, based on the communication system between mobile terminals and base stations. 3G mobiles provide a next generation mobile phone service that aims to offer high-speed data communication using high transmission efficiency in the higher frequency band. This offers a groundbreaking way to use mobile phones. Mobile phone service became ubiquitously available throughout Japan as 3G mobile phones offer major advantages for interactive video traffic. Applications of mobile phones have become diversified and driven by many services, such as music distribution, GPS auto-route guidance, electronic money, stock transactions, digital interactive TV, telemedicine and so forth. The proportion of 3G mobile phones overtook that of 2G mobile phones at the end of March 2006.
[wenxi-06:2006]	T. Nemoto K. Kitamura Y. Kanemitsu K. Yamakoshi W. Chen, X. Zhu. Involuntary Monitoring of Breath Rate and Heart Rate during Sleep. In Proc. of World Congress on Medical Physics and Biomedical Engineering, pages 102-105, Korea, Aug 2006.
	Invited talk in Joint Conference uHealthcare 2006
[wenxi-07:2006]	Masanori Akashi Wenxi Chen Daming Wei Gengfeng Wu Naotoshi Takeda Jian Liu, Takehito Kanno. Patterns of Bipedal Walking on Tri-axial Acceleration Signals and Their Use in Identifying Falling Risk of Older People. In Proc. of the 6th IEEE International Conference on Computer and Information Technology, 2006.
	Falls are the leading cause of injury-related death and hospitalization of aging people. To clarify this issue, temporal-spatial differences of gait between young people and the aging people with high falling risks are well investigated by many authors. Body acceleration is one of the measures receiving most interests, but major relevant literatures studied it only on one axis mainly vertical direction. In this paper, we study the triaxial acceleration signals during body moving and find some patterns inside. Based on the patterns, we propose a method to identify walking waveforms within the signal of body acceleration, and derive some measurements for assessing the rhythmicity in walking. The experiments show that our measurements are effective in identifying aging people with walking problems.
[zhuxin-03:2006]	Xin Zhu, Osamu Okazaki, and Daming Wei. The utility of wholeheart model for the computer simulation of intracardiac electrogram. In Transactions of the Japanese Society for Medical and Biological Engineering, volume 45, page 120. Japanese Society for Medical and Biological Engineering, Japanese Society for Medical and Biological Engineering, April 2007.

Unrefereed Papers

[dm-wei-05:2006]

Jin�fei Watanabe, Yuuki Ooshiba, Motoki Sakai, Wenxi Chen, and Daming Wei. A Feasibility Study on ƒ¿ Waves in Electroencephalogram as a Brain-Computer Interface Classifier. The Journal of Three Dimensional Images, 20(3):118-123, 2006.

Book

[dm-wei-12:2006]

Chang-Sung Jeong, Incheon Paik, Sunshin An, , and Daming Wei. The Proceedings of the IEEE Sixth International Conference on Computer and Information Technology. Proceedings of IEEE CIT. The IEEE Computer Society, Los Alamitos, 2006.

Grants

[dm-wei-13:2006]

Osama Okazaki Daming Wei, Wenxi Chen. Ministry of Education Scientific Research Fund, 2005-2006.

Academic Activities

[dm-wei-14:2006]	Daming Wei, Sep. 2006. General Co-Chair, IEEE 6th CIT
[wenxi-08:2006]	Wenxi Chen, Sept 2006. PC member of the 6th International Conference on Computer and Information Technology, Seoul, Korea
[wenxi-09:2006]	Wenxi Chen, 2006. General Biomedical Signal Processing & Control Computer Methods and Programs in Biomedicine Engineering in Medicine and Biology Magazine IEEE Transactions on Biomedical Engineering IEEE Transactions on Information Technology in Biomedicine International Journal of Computers and Applications International Journal of Pervasive Computing and Communications Medical & Biological Engineering & Computing The Open Biomedical Engineering Journal Transactions of the Japanese Society for Medical and Biological Engineering
[wenxi-10:2006]	Wenxi Chen, Aug 2006. Invited talk in Joint Conference uHealthcare and WC2006, Seoul, Korea

Others

[dm-wei-27:2006]	Fukushima Minpo. News article: Aizu IT award Grand Prix to QRS corporation (CEO: Prof. Daming Wei), a venture company of Aizu Univerisity for a new technique of derived 12-lead ECG telemornitor, Fukushima Minpo, 2006/1/18
[dm-wei-28:2006]	Fukushima Minpo. News article: Prof. Wei�fs success on development of derived 12-lead ECG, Fukushima Minpo, 2006/1/5
[dm-wei-29:2006]	Fukushima Minyu. News article: Aizu IT award Grand Prix to QRS corporation (CEO: Prof. Daming Wei), a venture company of Aizu Univerisity for a new technique of derived 12-lead ECG telemornitor, Fukushima Minyu, 2006/1/18
[wenxi-11:2006]	Wenxi Chen. Development of Wearable Sensor for Women Health Information System, 2006. Cooperative researcher in a joint project with QOL Corp. (http://www.qol21.com/) funded by JST from 2005 to 2007 fiscal year.

2008 THE UNIVERSITY OF AIZU ALL RIGHTS RESERVED