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Sensors, Cameras, and Systems for Industrial/Scientific Applications X

作者： Kim, Jiman Kong, Hyoun-Joong Park, Sangyun Noh, SeungWoo Lee, Seung-Rae Kim, Taejeong Kim, Hee Chan Interdisciplinary Program Graduate School Seoul National University Seoul Korea Republic of Department of Electrical Engineering and Computer Sciences 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

Authentication using finger vein pattern has substantial advantage than other biometrics. Because human vein patterns are hidden inside the skin and tissue, it is hard to forge vein structure. But conventional system using NIR LED array has two drawbacks. First, direct contact with LED array raise sanitary problem. Second, because of discreteness of LEDs, non-uniform illumination exists. We propose non-contact finger vein acquisition system using NIR laser and Laser line generator lens. Laser line generator lens makes evenly distributed line laser from focused laser light. Line laser is aimed on the finger longitudinally. NIR camera was used for image acquisition. 200 index finger vein images from 20 candidates are collected. Same finger vein pattern extraction algorithm was used to evaluate two sets of images. Acquired images from proposed non-contact system do not show any non-uniform illumination in contrary with conventional system. Also results of matching are comparable to conventional system. We developed Non-contact finger vein acquisition system. It can prevent potential cross contamination of skin diseases. Also the system can produce uniformly illuminated images unlike conventional system. With the benefit of non-contact, proposed system shows almost equivalent performance compared with conventional system. © 2009 SPIE-IS&T.

关键词： Biometrics

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Registration of finger vein image using skin surface information for authentication

Registration of finger vein image using skin surface informa...

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Image Processing: Machine Vision Applications II

作者： Noh, SeungWoo Kong, Hyoun-Joong Park, SangYun Kim, JiMan Lee, Seung-Rae Kim, Taejeong Kim, Hee Chan Interdisciplinary Program Bioengineering Major Graduate School Seoul National University Seoul Korea Republic of Interdisciplinary Program Biomedical Engineering Major Graduate School Seoul National University Seoul Korea Republic of Institute of Medical and Biological Engineering Medical Research Center Seoul National University Seoul Korea Republic of Department of Electrical Engineering and Computer Sciences Seoul National University Seoul Korea Republic of Department of Biomedical Engineering College of Medicine Seoul National University Seoul Korea Republic of

ISBN: (纸本)9780819475015

The finger vein image acquired with an acquisition system should be properly aligned to proceed with comparing algorithm. However it is not easy to find control the points since the images are naturally blurred with an inherent scattering property. To overcome this problem, we propose a novel finger vein registration method utilizing skin surface information (i.e. wrinkles and outlines). We assumed that finger crooking was insignificant. Images were sampled with intended translation and rotation. Each time, two images were acquired successively by switching the light source;one with infrared light and the other with white light. Degree of rotation and translation of sampled image were calculated using outline features in the white light image and then the infrared image was transformed according to the calculated data. To validate our method, correlation values were computed between identical subjects and different subjects. High correlation values were shown between identical subjects whereas low values were shown between different subjects. © 2009 SPIE.

关键词： Authentication

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Micro-fabricated fluorescence-activated cell sorter

Micro-fabricated fluorescence-activated cell sorter

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31st Annual International Conference of the IEEE engineering in Medicine and Biology Society: engineering the Future of Biomedicine, EMBC 2009

作者： Cho, Sung Hwan Chen, Chun H. Tsai, Frank S. Lo, Yu-Hwa Materials Science and Engineering Program University of California at San Diego San Diego CA 92093 United States Department of Bioengineering University of California at San Diego San Diego CA 92093 United States Electrical and Computer Engineering Department University of California at San Diego San Diego CA 92093 United States

ISBN: (纸本)9781424432967

We demonstrate a high sensitivity, high throughput microfabricated cell sorting device with the integrated piezoelectric actuator and optofluidic waveguide on a chip. For automated sorting, field-program.able-gate-array (FPGA) embedded real time control loop system is built. The sorting is performed under high flow rate (~10 cm/sec), and the sorting system can achieve a high throughput (> 1kHz) with high purity. Moreover, to enhance its sensitivity, Teflon AF coated liquid core waveguide (LCW) structure is demonstrated. Teflon AF has a lower refractive index (n=1.31) than water (n=1.33) and forms the cladding layer of the LCW. Incident light is confined and guided along the Teflon AF coated fluidic channel, and interact with samples flowing along the same channel. This enables flexible device design and gives high sensitivity to the fluorescence detection system. The preliminary results demonstrate sorting fluorescent beads at a sorting efficiency of ~70% with no false sorting. ©2009 IEEE.

关键词： Field program.able gate arrays (FPGA)

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He ion irradiation damage in Al/Nb multilayers

He ion irradiation damage in Al/Nb multilayers

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作者： Li, Nan Martin, M.S. Anderoglu, O. Misra, A. Shao, L. Wang, H. Zhang, X. Department of Mechanical Engineering Materials Science and Engineering Program Texas A and M University College Station TX 77843-3123 United States Department of Nuclear Engineering Texas A and M University College Station TX 77843-3133 United States Materials Physics and Application Division Los Alamos National Laboratory Los Alamos NM 87545 United States Department of Electrical and Computer Engineering Texas A and M University College Station TX 77843-3128 United States

We investigate the evolution of microstructure and mechanical properties of sputter-deposited Al/Nb multilayers with miscible fcc/bcc type interface and individual layer thickness, h, of 1-200 nm, subjected to helium ion irradiations: 100 keV He+ ions and a fluence of 6 10 16/cm2. Helium bubbles, 1-2 nm in diameter, are observed. When h is greater than 25 nm, hardnesses of irradiated multilayers barely change, whereas radiation hardening is more significant at smaller h. Transmission electron microscopy and scanning transmission electron microscopy studies reveal the formation of a thin layer of Nb3 Al intermetallic phase along the Al/Nb interface as a consequence of radiation induced intermixing. The dependence of radiation hardening on h is interpreted by using a composite model considering the formation of the hard Nb3 Al intermetallic layer. © 2009 American Institute of Physics.

关键词： High resolution transmission electron microscopy

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Gait recognition system tailored for Arab costume of the Gulf region

Gait recognition system tailored for Arab costume of the Gul...

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IEEE International Symposium on Signal Processing and Information Technology (ISSPIT)

作者： Tamer Shanableh Khaled Assaleh Layla Al - Hajjaj AbdulWahab Kabani Department of computer science and Engineering American University of Sharjah UAE Department of Electrical Engineering American University of Sharjah UAE Computer Science program American university of Sharjah UAE

Existing work on gait recognition is focused on casual (western) customs hence not suitable for the gulf region where long gowns are used for both men and women. This paper proposes a gait recognition solution that is suitable for both gulf customs and casual customs. The solution is based on computing an adaptive image prediction between consecutive images. The resultant predictions are then accumulated into one image and transformed using either discrete cosine transformation (DCT) or Radon transformation. The feature vectors of the gait are computed from such transformed images. Feature modeling based on polynomial networks follows. The proposed solution is tested on a dataset with around 100 participants with mixed genders and mixed customs. The proposed system yields an impressive classification rates approaching 100% accuracy.

关键词： Least squares approximation Electrocardiography Computational complexity Noise cancellation Computational modeling Adaptive filters Steady-state Educational institutions Signal to noise ratio Vectors

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A digitally program.able voltage-mode multifunction filter using CCDVCCs

A digitally programmable voltage-mode multifunction filter u...

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2009 9th International Symposium on Communications and Information Technology, ISCIT 2009

作者： Chanapromma, Chaiyan Jaikla, Winai Siripruchyanun, Montree Computer Engineering Program Faculty of Industrial Technology Uttaradit Rajabhat University Muang Uttaradit 53000 Thailand Electric and Electronic Program Faculty of Industrial Technology Suan Sunandha Rajabhat University Dusit Bangkok 10300 Thailand Department of Teacher Training in Electrical Engineering Faculty of Technical Education King Mongkut's University of Technology North Bangkok Bangkok 10800 Thailand

ISBN: (纸本)9781424445219

This article presents a voltage-mode multi-function filter performing completely standard functions: low-pass, high-pass, band-pass, band-reject and all-pass functions, current controlled differential voltage current conveyors (CCDVCCs). The features of the circuit are that: the quality factor and pole frequency can be tuned independently via the input bias currents: the circuit description is very simple, consisting of merely 2 CCDVCCs, 1 resistor and 2 capacitors. Only one external resistor and without any component matching conditions, the proposed circuit is very appropriate to further develop into an integrated circuit. Additionally, each function response can be selected by suitably selecting input signals with digital method. The PSPICE simulation results are depicted. The given results agree well with the theoretical anticipation. ©2009 IEEE.

关键词： Resistors

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Duty cycle dependent pulsed IV simulation and thermal time constant model fitting for LDMOS transistors

Duty cycle dependent pulsed IV simulation and thermal time c...

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74th ARFTG Microwave Measurement Conference - System Modeling and Measurement for High Accuracy Verification

作者： Meena, Sivalingam Somasundaram Baylis, Charles Dunleavy, Lawrence Marbell, Marvin Center for Wireless and Microwave Information Systems Department of Electrical Engineering University of South Florida Tampa FL United States Modelithics Inc. Tampa FL United States Wireless and Microwave Circuits and Systems Program Department of Electrical and Computer Engineering Baylor University Waco TX United States Modelithics Inc. United States Infineon Technologies Morgan Hill CA United States

ISBN: (纸本)9781424457137

A pulsed simulation approach is demonstrated for prediction of duty-cycle dependent thermal effects in transistors. Also a novel method is shown for fitting and/or validating electro-thermal models using pulsed IV measurements and pulsed IV simulations. A commercial LDMOS device is used to demonstrate the new methods. After extracting the thermal time constant, good agreement is achieved between measured and simulated pulsed IV results under a wide range of different pulse conditions including DC, very short (

关键词： Equivalent circuits

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Determination of Thermal Parameters of Nanostructures Exhibiting One-Dimensional Heat Flow Through a Thermal Transient Method

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MRS Online Proceedings Library 2009年第1期1172卷 54-59页

作者： Arriagada, Anton Yu, Edward T. Bandaru, Prabhakar R. Deparment of Electrical and Computer Engineering University of California at San Diego La Jolla USA Materials Science Program Mechanical Engineering Department University of California at San Diego La Jolla USA

We present an improved methodology for a thermal transient method enabling simultaneous measurement of thermal conductivity and specific heat of nanoscale structures with one-dimensional heat flow. The temporal response of a sample to finite duration heat pulse inputs for both short (1 ns) and long (5μs) pulses is analyzed and exploited to deduce the thermal properties. Excellent agreement has been obtained between the recovered physical parameters and computational simulations.

关键词： thermal conductivity nanoscale simulation

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Achievable Capacity of a Spectrum Sharing System over Hyper Fading Channels

Achievable Capacity of a Spectrum Sharing System over Hyper ...

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GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference

作者： Sabit Ekin Ferkan Yilmaz Hasari Celebi Khalid A. Qaraqe Mohamed-Slim Alouini Erchin Serpedin Department of Electrical and Computer Engineering Texas A and M University Qatar Doha Qatar Electrical Engineering Program King Abdullah University for Science and Technology Thuwal Saudi Arabia

Cognitive radio with spectrum sharing feature is a promising technique to address the spectrum under-utilization problem in dynamically changing environments. In this paper, achievable capacity gain of spectrum sharing systems over dynamic fading environments is studied. For the analysis, a theoretical fading model called hyper fading model that is suitable to the dynamic nature of cognitive radio channel is proposed. Closed-form expression of probability density function (PDF) and cumulative density function (CDF) of the signal-to-noise ratio (SNR) for secondary users in spectrum sharing systems are derived. In addition, the capacity gains achievable with spectrum sharing systems in high and low power regions are obtained. Numerical simulations are performed to study the effects of different fading figures, average powers, interference temperature, and number of secondary users on the achievable capacity.

关键词： Fading Power system modeling Rayleigh channels Temperature Cognitive radio Interference constraints Random variables computer science education Educational program. Systems engineering education

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Serendipitous discoveries in microarray analysis

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BMC Bioinformatics 2010年第4期11卷 1-1页

作者： Sally R Ellingson Charles A Phillips Michael A Langston Randy Glenn Douglas Swanson Thomas Ha Daniel Goldowitz Genome Science and Technology Program University of Tennessee Knoxville TN 37996 USA Department of Electrical Engineering and Computer Science University of Tennessee Knoxville TN 37996 USA Centre for Molecular Medicine and Therapeutics University of British Columbia Vancouver BC V5Z 4H4 Canada

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