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作者： Ko, Sang-Jin Lee, Jun-Woo Choi, Byoung-Suk Lee, Ju-Jang Graduate School of Automobile Technology KAIST Daejeon Korea Republic of Robotics Program KAIST Daejeon Korea Republic of Department of Electrical Engineering and Computer Science KAIST Daejeon Korea Republic of

ISBN: (纸本)9784990288020

Unmanned vehicle is future vehicle technology. Lateral control technology and longitudinal control technology are needed for unmanned vehicle. Automatic steering system is lateral control technology. A automatic steering system automatically controls the steering to keep the vehicle in its land and also to follow the lane as it curves around. This paper proposes automatic steering system based on fuzzy logic. If the fuzzy rules are set properly, the fuzzy controller can control the objective system nicely. To design an automatic steering system, lateral error dynamics of a vehicle is derived. The proposed automatic steering system is evaluated by SIMULINK in MATLAB. The simulation results show that the proposed automatic steering system works satisfactorily for keeping the vehicle in its land and following the lane. ©ISAROB 2008.

关键词： Fuzzy control

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Prediction of protein secondary structures with a novel kernel density estimation based classifier

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BMC Research Notes 2008年第1期1卷 1-6页

作者： Chang, Darby Tien-Hao Ou, Yu-Yen Hung, Hao-Geng Yang, Meng-Han Chen, Chien-Yu Oyang, Yen-Jen Department of Electrical Engineering National Cheng Kung University Tainan 70101 Taiwan Graduate School of Biotechnology and Bioinformatics Yuan Ze University Chung-Li 320 Taiwan Department of Computer Science and Engineering Yuan Ze University Chung-Li 320 Taiwan Department of Computer Science and Information Engineering National Taiwan University Taipei 106 Taiwan Department of Bio-Industrial Mechatronics Engineering National Taiwan University Taipei 106 Taiwan Graduate Institute of Biomedical Electronics and Bioinformatics National Taiwan University Taipei 106 Taiwan Graduate Institute of Networking and Multimedia National Taiwan University Taipei 106 Taiwan Center for Systems Biology and Bioinformatics National Taiwan University Taipei 106 Taiwan

Background: Though prediction of protein secondary structures has been an active research issue in bioinformatics for quite a few years and many approaches have been proposed, a new challenge emerges as the sizes of contemporary protein structure databases continue to grow rapidly. The new challenge concerns how we can effectively exploit all the information implicitly deposited in the protein structure databases and deliver ever-improving prediction accuracy as the databases expand rapidly. Findings: The new challenge is addressed in this article by proposing a predictor designed with a novel kernel density estimation algorithm. One main distinctive feature of the kernel density estimation based approach is that the average execution time taken by the training process is in the order of O(nlogn), where n is the number of instances in the training dataset. In the experiments reported in this article, the proposed predictor delivered an average Q3(three-state prediction accuracy) score of 80.3% and an average SOV (segment overlap) score of 76.9% for a set of 27 benchmark protein chains extracted from the EVA server that are longer than 100 residues. Conclusion: The experimental results reported in this article reveal that we can continue to achieve higher prediction accuracy of protein secondary structures by effectively exploiting the structural information deposited in fast-growing protein structure databases. In this respect, the kernel density estimation based approach enjoys a distinctive advantage with its low time complexity for carrying out the training process. © 2008 Chang et al;licensee BioMed Central Ltd.

关键词： Training Dataset Kernel Density Testing Dataset Kernel Density Estimation Protein Chain

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Light scattering by white-emitting CdSe nanocrystals and traditional YAG:Ce3+ phosphor particles

Light scattering by white-emitting CdSe nanocrystals and tra...

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2008 MRS Fall Meeting

作者： Gosnell, Jonathan D. Weiss, Sharon M. Interdisciplinary Graduate Program in Materials Science Vanderbilt University Station B 350106 Nashville TN 37235 United States Department of Electrical Engineering and Computer Science Vanderbilt University Station B 351824 Nashville TN 37235 United States

ISBN: (纸本)9781615677740

In order for solid state lighting technology to become a mainstream technology, one of the major challenges to overcome is increasing the efficiency of these devices while maintaining a proper color balance. A significant source of efficiency loss in commercial phosphor-based white light-emitting diodes (LEDs) is light scattering off large, micron-sized phosphor particles. The use of recently reported single-size CdSe white-light nanocrystals in place of traditional phosphors, such as YAG:Ce3+, could lead to lower scattering losses and higher device efficiencies as a result of the extremely small CdSe core diameter of approximately 1.5 nm. This work theoretically and experimentally investigates the absorption, scattering, and extinction coefficients and cross sections of CdSe white-light nanocrystals in comparison to YAG:Ce3+ phosphor particles. Calculations were performed based on the Rayleigh approximation and Mie theory of scattering. Experiments were carried out using thin films of encapsulated nanocrystals. By measuring the absorbance and thickness of the films, in addition to the concentration of the nanocrystals, extinction coefficients and cross sections were determined using the Beer-Lambert law. A reasonable agreement was obtained between theoretical and experimental data showing that the size of the particle has a significant impact on the extinction, absorption, and scattering properties of thin films. The considerably reduced scattering from the nanocrystals compared to traditional phosphors, along with their inherent high quality white light emission, makes them a promising candidate for future solid state lighting applications. © 2009 Materials Research Society.

关键词： Cadmium compounds

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Intelligent Pillow Type Wireless Charger for Fully Implantable Middle Ear Hearing Device with a Function of Electromagnetic Emission Reduction

Intelligent Pillow Type Wireless Charger for Fully Implantab...

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International Symposium on Intelligent Information Technology Application, IITA

作者： Hyung-Gyu Lim Dong-Wook Kim Myoung-Won Lee Jang-Woo Lee Sang-Hyo Woo Min-Woo Kim Eui-Sung Jung Ki-Woong Seong Jyung-Hyun Lee Jin-Ho Cho Graduate School of Electrical Engineering and Computer Science Kyungpook National University Daegu South Korea Department of Biomedical Engineering Kyungpook National University Daegu South Korea

Recently, implantable middle ear hearing devices have been developed as full implant by several countries for hearing impaired people. These devices will be surgically implanted in human temporal bone, a rechargeable battery is employed for long-term implant. To charge the battery, a pillow type wireless charger using electromagnetic coupling has been developed in South Korea. In the previous device, several primary coils are used, which can surround head considering head's movement in sleep. However, this device should unnecessarily consume power to drive the uncoupled primary coil. Especially, users must expose themselves to electromagnetic field generated from all primary coils during the charge process. In order to solve these problems, an intelligent pillow type wireless charger, which can recognize the implanted coilpsilas position using hall effect sensors and which can drive the only primary coil among primary coil's array, has been proposed to reduce potential risks from the electromagnetic field emission.

关键词： Ear Auditory system Electromagnetic devices Coils Batteries Electromagnetic fields Sensor arrays Auditory implants Surgery Humans

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A newborn screening system based on Service-Oriented Architecture embedded Support Vector Machine

A newborn screening system based on Service-Oriented Archite...

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4th IEEE International Symposium on Service-Oriented System engineering, SOSE 2008

作者： Hsieh, Sung-Huai Hsieh, Sheau-Ling Chien, Yin-Hsiu Wang, Zhenyu Weng, Yung-Ching Lai, Feipei Information Systems Office National Taiwan University Hospital Taipei Taiwan Department of Computer Science and Information Engineering National Taiwan University Taipei Taiwan Department of Electrical Engineering National Taiwan University Taipei Taiwan Network and Computer Centre National Chiao Tung University Hsin Chu Taiwan Graduate Institute of Biomedical Electronics and Bioinformatics National Taiwan University Taiwan Department of Medical Genetics National Taiwan University Hospital Taiwan Computing Laboratory Oxford University Oxford United Kingdom

ISBN: (纸本)9780769534992

The clinical symptoms of metabolic disorders are rarely apparent during the neonatal period, and if they are not treated early, irreversible damage, such as mental retardation, or even death, may occur. Therefore, the practice of newborn screening is important to the prevention of permanent disabilities in newborns. In this paper, we propose a newborn screening system that uses Support Vector Machine (SVM) classification techniques to evaluate raw data on the concentrations of metabolic substances obtained from tandem mass spectrometry (MS/MS) to determine if a newborn has a metabolic disorder. As per the concept of Service-Oriented Architecture (SOA), we designed the system using web services techniques, which are suitable for integrating heterogeneous platforms, protocols, and applications. It can be integrated seamlessly into National Taiwan University Hospital Information Systems (HIS) or other related HIS. © 2008 IEEE.

关键词： Web services

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Enhancement of information transmission with stochastic resonance in hippocampal CA1 neuron network

Enhancement of information transmission with stochastic reso...

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

作者： Minato Kawaguchi Hiroyuki Mino Dominique M. Durand Graduate School of Human Sciences Waseda University Tokorozawa Japan Department of Electrical and Computer Engineering Kanto Gakuin University Yokohama Japan Neural Engineering Center Department of Biomedical Engineering Case Western Reserve University Cleveland OH USA

Stochastic resonance (SR) has been shown to improve the detection of subthreshold neural signals in uncorrelated noise. It is yet unclear if and how interactions within a population of neurons can improve information processing in neural networks. In this paper, we investigate the effect of the number of neurons on information transmission in an array of hippocampal CA1 neuron models, i.e., array-enhanced SR (AESR). In computer simulations, the sub-threshold synaptic current (signal) generated by a filtered homogeneous Poisson process was applied to a distal position in each of the apical dendrites, while the background synaptic currents (uncorrelated noise) were presented to a proximal or middle point in each of the dendrites. The transmembrane potentials were recorded at one of the somas in the array of CA1 neuron models, in order to find spike firings and likewise to estimate the total and noise entropies calculated from those spike firing times. The results show that the information rate estimated at the population of the CA1 neuron models is maximized at a specific amplitude of uncorrelated noise, implying AESR. The results further show that the maximum information rate is increased as the number of neurons is increased. It is concluded that AESR can be an important role in information processing is neural systems and that the AESR is modulated by the number of neurons within the network.

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Web Services based newborn screening system with Support Vector Machines

Web Services based newborn screening system with Support Vec...

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5th International Conference on Information Technology and Applications, ICITA 2008

作者： Hsieh, Sung-Huai Hsieh, Sheau-Ling Weng, Yung-Ching Chien, Yin-Hsiu Wang, Zhenyu Chen, Po-Hao Chang, Hsing-Yu Lai, Feipei Hwu, Wu-Liang Information Systems Office National Taiwan University Hospital Taipei Taiwan Department of Computer Science and Information Engineering National Taiwan University Taipei Taiwan Department of Electrical Engineering National Taiwan University Taipei Taiwan Network and Computer Centre National Chiao Tung University Hsin Chu Taiwan Graduate Institute of Biomedical Electronics and Bioinformatics National Taiwan University Taiwan Department of Information Management National Taiwan University Taipei Taiwan Department of Medical Genetics National Taiwan University Hospital Taiwan Computing Laboratory Oxford University Oxford United Kingdom

ISBN: (纸本)9780980326727

The clinical symptoms of metabolic disorders during neonatal periods are often not apparent. If not treated earlier, irreversible damages such as mental retardation or even death may occur. Therefore, practicing the newborn screening is essential to prevent newborns from these damages. In the paper, we propose a newborn screening system using Support Vector Machines (SVM) classification techniques to evaluate, interpret, and determine whether a newborn has metabolic disorder diseases. The raw data, i.e., substances concentrations, were collected from the Tandem Mass Spectrometry (MS/MS). In addition, based on the concept of Service-Oriented Architecture (SOA), we design the system under Web Services .NET environment. The system provides features including heterogeneous platforms, protocols, as well as applications. It can be integrated seamlessly into National Taiwan University Hospital Information Systems later.

关键词： Web services

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Fitting System Based on Base-Etation and Fitting Software for Fully Implantable Middle Hearing Device

Fitting System Based on Base-Etation and Fitting Software fo...

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International Symposium on Intelligent Information Technology Application, IITA

作者： Jang-Woo Lee Eui-Sung Jung Hyung-Gyu Lim Myoung-Won Lee Dong-Wook Kim Min-Woo Kim Ki-Woong Seong Sang-Hyo Woo Jyung-Hyun Lee Jin-Ho Cho Graduate School of Electrical Engineering and Computer Science Kyungpook National University Daegu South Korea Department of Biomedical Engineering Kyungpook National University Daegu South Korea Kyungpook National University Daegu Daegu KR

We announced that fully implantable middle ear hearing device (F-IMEHD) has been researched in several papers. The F-IMEHD requires proper fitting process reflected properties of each device like other hearing aids. The F-IMEHD uses vibration transducer attached on ossicles for a sound transmission to human's inner ear. The F-IMEHD is implanted under the skin. Therefore, the fitting process for F-IMEHD has to consider properties of the microphone and transducer. In this paper, fitting system which consist of basestation and fitting software, have been designed and implemented for fitting and control of F-IMEHD. We calculate proper parameters according to hearing threshold level of each patient using the fitting software, and the parameters are transmitted to implanted system from the base-station. The base-station has all control function for F-IMEHD using a wireless communication. Moreover the base-station is a relay station which fitting parameters send to implanted system from fitting software on a PC.

关键词： Auditory system Ear Acoustic transducers Communication system control Hearing aids Skin Microphones Software design Control systems Wireless communication

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Nanoscale porous silicon waveguides for biosensing applications

Nanoscale porous silicon waveguides for biosensing applicati...

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21st Annual Meeting of the IEEE Lasers and Electro-Optics Society, LEOS 2008

作者： Rong, G. Wei, X. Kang, C. Liscidini, M. Sipe, J.E. Mernaugh, R.L. Weiss, S.M. Department of Electrical Engineering and Computer Science Vanderbilt University Nashville TN 37235 United States Interdisciplinary Graduate Program in Materials Science Vanderbilt University Nashville TN 37235 United States Department of Physics Institute for Optical Sciences University of Toronto Toronto ON M5S 1A7 Canada Department of Biochemistry Vanderbilt University Nashville TN 37235 United States

Nanoscale porous silicon waveguides, both on silicon substrates and free-standing membranes, are explored for biosensing applications. Measured detection limits in the nanomolar range are reported for DNA sensing. ... 详细信息

ISBN: (纸本)9781424419326

关键词： Porous silicon

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Study of equilibrium sense improvement displaying visual information

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Key engineering Materials 2008年 381-382卷 369-372页

作者： Kim, G.B. Jeong, S.H. Chong, W.S. Kang, H.S. Kim, S.J. Kim, M.H. Hwang, J.W. Hong, C.U. Education Program for 21st Century Chonbuk National University Research Institute of Clinical Medicine Duckjin-Dong Jeonju Chonbuk 561-756 Korea Republic of Department of Computer Engineering Graduate School Chonbuk National University Duckjin-Dong Jeonju Chonbuk 561-756 Korea Republic of Department of Biomedical Engineering Graduate School Chonbuk National University Duckjin-Dong Jeonju Chonbuk 561-756 Korea Republic of Department of Pharmacology College of Veterinary Medicine Chonbuk National University Duckjin-Dong Jeonju Chonbuk 561-756 Korea Republic of Department of Bio and Applied Chemistry Iksan National College Ma-Dong Iksan Chonbuk 570-752 Korea Republic of Department of Thoracic and Cardiovascular Surgery Chonbuk National University Medical Schools Duckjin-Dong Jeonju Chonbuk 561-756 Korea Republic of Collage of Engineering Chonbuk National University Duckjin-Dong Jeonju Chonbuk 561-756 Korea Republic of Division of Bionics and Bioinformatics Collage of Engineering Chonbuk National University Duckjin-Dong Jeonju Chonbuk 561-756 Korea Republic of

The effectiveness of the visual feedback to improve ability with the sense and muscular strength of human in our bicycle system was quantitatively verified in our study. Experiments were performed to find the factors related to the training of equilibrium sense. The subjects consisted of young and the aged and the group of young people was compared against the group of the aged. We investigated three different training modes, non-visual feedback (NVF), visual feedback of the weight (VFW), and visual feedback of the center of pressure (VFC) and measured the riding time and speed, the weight shift, and the center of pressure (COP) for twenties and seventies. The results showed that the running capability of the young and the aged became much better after repeated training. In addition, it was found out that the ability to control postural balance and the capability of equilibrium sense were improved with the presentation of the visual feedback information. These results will be effective in the diagnosis of equilibrium sense and vestibular function with the aged.

关键词： Feedback

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