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IEEE/NLM Life science Systems and Applications Workshop

作者： Stephan T. Koev Michael A. Powers Vlad Badilita Hyunmin Yi William E. Bentley Gregory F. Payne Gary W. Rubloff Reza Ghodssi Institute for Systems Research ISR University of Maryland College Park MD USA University System of Maryland Adelphi MD US Department of Materials Science and Engineering University of Maryland College Park MD USA Department of Chemical Engineering University of Maryland College Park MD 20742 University of Maryland Biotechnology Institute (UMBI) University of Maryland College Park MD 20742 Bioengineering Graduate Program University of Maryland College Park MD 20742 University of Maryland College Park MD USA University of Maryland Biotechnology Institute College Park MD USA Institute for Systems Research (ISR) University of Maryland College Park MD 20742 Department of Materials Science and Engineering University of Maryland College Park MD 20742 Department of Electrical and Computer Engineering University of Maryland College Park MD 20742 Institute for Systems Research (ISR) University of Maryland College Park MD 20742

ISBN: (纸本)1424402778

We present the use of the polysaccharide chitosan for immobilizing biomolecules on microfabricated device surfaces. The main advantages of chitosan are its abundance of primary amine groups and its ability to be electrodeposited. Biomolecules are easily attached to chitosan 's amines by standard glutaraldehyde chemistry. The electrodeposition of chitosan allows accurate spatial and temporal control of biomolecule placement. We have demonstrated this biofunctionalization method for two different bioMEMS devices: a biophotonic sensor and a micromechanical biosensor. We have successfully assembled probe DNA on each of them and detected hybridization with target DNA as a demonstration of sensor operation. Here, we briefly present the fabrication procedure and testing results for both of these bioMEMS sensing devices

关键词： DNA Biosensors Molecular biophysics Probes Micromechanical devices Optical sensors Optical surface waves Optical interferometry Assembly Biomedical optical imaging

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Global academy'-remote network applications connecting Japan and Chile over GEMnet2 and R&E networks

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NTT Technical Review 2006年第5期4卷 28-38页

作者： Uose, Hisao Oinuma, Morihide Noguchi, Kazuto Sakai, Yoshihisa Tatematsu, Ken'ichi Vera, Eduardo S. Baloian, Nelson Pulgar, Hernán Ramos, Manuel Mujica, Luis Felipe NTT Advanced Technology Corporation Musashino-shi 180-858 Japan NTT Service Integration Laboratories NTT Photonics Laboratories of Japan IEEE IEICE ALMA-J Project Office National Astronomical Observatory of Japan Nagova University Nobeyama Radio Observatory University of Texas Austin Electrical Engineering and Computer Science Departments University of Chile AccessNova Program University of Tokyo Computer Science Department University of Chile Waseda University Japan Astronomy Department University of Chile ALMA Project Office Santiago Mining Section Andina Division CODELCO Andina Division Photonics Network Project IM2 Chile IM2

This article describes two demonstrations at the NTT Group Communication EXPO held at the Tokyo International Forum in December 2005. These showed visitors two of our trials on the feasibility of remotely operating instruments in Chile from Japan: an optical telescope and rock hammers in an underground copper mine. These applications use a relatively high bandwidth of around 100 Mbit/s and require short delay times for smooth interactive operation. To satisfy these requirements we used NTT's experimental research network GEMnet2 in collaboration with partner R&E (research and education) networks in North and South America. The demonstrations showed that Internet-based networks can handle interactive network applications with sufficient quality between two sites separated by almost the maximum possible distance on the Earth as long as the bandwidth and the route are carefully managed.

关键词： Remote control

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An efficient decryption method for RSA cryptosystem

An efficient decryption method for RSA cryptosystem

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19th International Conference on Advanced Information Networking and Applications, AINA 2005

作者： Hwang, Ren-Junn Su, Feng-Fu Yeh, Yi-Shiung Chen, Chia-Yao Department of Computer Science and Information Engineering TamKang University Tamsui Taipei 251 Taiwan Degree Program of Electrical Engineering and Computer Science National Chiao Tung University Hsinchu 300 Taiwan

ISBN: (纸本)0769522491

This paper proposes an efficient method to implement RSA decryption algorithm. RSA cryptosystem is the most attractive and popular security technique for many applications, such as electronic commerce and secure internet access. It has to perform modular exponentiation with large exponent and modulus for security consideration. The RSA cryptosystem takes great computational cost. In many RSA applications, user uses a small public key to speed up the encryption operation. However, the decryption operation has to take more computational cost to perform modular exponentiation by this case. This paper proposes an efficient decryption method not only based on Chinese Remainder Theorem (CRT) but also the strong prime of RSA criterion. The proposed decryption method only takes 10% computational costs of the traditional decryption method. It also reduces 66% computational costs than that of decryption methods based on CRT only. In a word, the speed of our proposed method is almost 2.9 times faster than the decryption method based on CRT only. The proposed method enhances the performance of the RSA decryption operation. © 2005 IEEE.

关键词： Cryptography

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MEG adaptive noise suppression using Fast LMS

MEG adaptive noise suppression using Fast LMS

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2nd International IEEE EMBS Conference on Neural engineering, 2005

作者： Ahmar, Nayef E. Simon, Jonathan Z. Department of Electrical and Computer Engineering University of Maryland College Park United States Department of Biology University of Maryland College Park United States Bioengineering Program University of Maryland College Park United States

Magnetoencephalography (MEG) measures magnetic fields generated by electric currents in the brain, non-invasively and with millisecond temporal resolution. Typical signals are 10-13 T, so noise contamination due to external magnetic fields is a serious concern. Digital signal processing is typically required in addition to magnetic shielding. Using three reference channels, displaced from the head, to measure the noise, we apply adaptive filtering to subtract out estimates of the noise, via the Block Least-Mean-Square ("Fast LMS") method. The algorithm is tested by its effects on the number and distribution of channels which have statistically significant signals (distinguishable from background noise at a specified false-positive rate). We show that Fast LMS both increases the number significant channels and reduces the variance of false positives. © 2005 IEEE.

关键词： Magnetoencephalography

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On-line system identification using context discernment

On-line system identification using context discernment

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International Joint Conference on Neural Networks, IJCNN 2005

作者： Holmstrom, Lars Santiago, Roberto Lendaris, George G. NW Computational Intelligence Laboratory Portland State University Portland OR 97201 Systems Science Ph.D. Program Department of Systems Science and Electrical and Computer Engineering

ISBN: (纸本)0780390482

Mathematical models are often used in system identification applications. The dynamics of most systems, however, change over time and the sources of these changes cannot always be directly determined or measured. To maintain model accuracy, it is desirable to design system identifiers that can adapt to these dynamical shifts. We use reinforcement learning to train an agent to recognize dynamical changes in a modeled system and to estimate new parameter values for the model. The subsequent actions of this agent are characterized as "moving" the parameterized model on an optimal trajectory in model parameter space. It is found that this method is capable of quickly and accurately discerning the correct parameter values. © 2005 IEEE.

关键词： Identification (control systems)

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Near-field inverse scattering: The current state of theory and experiment

Near-field inverse scattering: The current state of theory a...

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Computational Optical Sensing and Imaging, COSI 2005

作者： Carney, P. Scott Schotland, John C. Department of Electrical and Computer Engineering Beckman Institute for Advanced Science and Technology University of Illinois at Urbana-Champaign Urbana IL United States Department Bioengineering University of Pennsylvania Philadelphia PA United States

We will discuss the forward problem and recent progress in the theory of inverse scattering for various modalities of near-field optics. Experimental demonstration will be presented and ongoing efforts in experimental... 详细信息

ISBN: (纸本)155752789X

关键词： Forward scattering

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Complex valued equivalent-current dipole fits for MEG responses

Complex valued equivalent-current dipole fits for MEG respon...

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2nd International IEEE EMBS Conference on Neural engineering, 2005

作者： Wang, Yadong Ahmar, Nayef E. Xiang, Juanjuan Ma, Ling Poeppel, David Simon, Jonathan Z. Cognitive Neuroscience of Language Laboratory University of Maryland College Park Department of Electrical and Computer Engineering University of Maryland College Park Bioengineering Program University of Maryland College Park Department of Biology University of Maryland College Park

Complex numbers appear naturally in biological systems in the context of the Fourier transform. In particular, physiological magnetic field data from whole head magneto-encephalography (MEG) is complex after a Fourier transform. The whole-head MEG Steady State Response (SSR) to a stationary modulated stimulus results in a complex magnetic field for each MEG channel, from the frequency corresponding to that of the stimulus modulation. This complex data set is used to estimate the neural current sources generating the magnetic field, naturally leading to complex current sources. We show that standard inverse methods of estimating the current sources, such as the single equivalent-current dipole, generalize to complex sources in a useful and straightforward manner. The usage and utility of the complex magnetic field and the complex neural current source are demonstrated using examples from auditory SSR experiments. © 2005 IEEE.

关键词： Equivalent circuits

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Monolith or mosaic: Using demographics and detailed surveys to understand the many and varied dimensions of first-year female engineering students

Monolith or mosaic: Using demographics and detailed surveys ...

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2005 ASEE Annual Conference and Exposition: The Changing Landscape of engineering and Technology Education in a Global World

作者： Pieronek, Catherine McWilliams, Leo H. Silliman, Stephen E. Uhran, John J. Gunty, Mark Graf, Carrie University of Notre Dame United States Women's Engineering Program University of Notre Dame United States Department of Computer Science and Engineering Department of Electrical Engineering College of Engineering University of Notre Dame United States

The use of demographic data to establish baseline characteristics of first-year female engineering students is discussed. A series of three surveys conducted during the two-course sequence has provided a wealth of information that further informs the significance of the demographic and results-oriented data. Longitudinal comparison of the data helps to identify the different key differences from one year to another. Knowledge of the differences among groups of female engineering students has proven crucial to improve the retention of women.

关键词： engineering education

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Stochastic inverse consistent registration

Stochastic inverse consistent registration

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

作者： Sai, Kit Yeung Pengcheng, Shi Department of Electrical and Electronic Engineering Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong Bioengineering Program Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong

ISBN: (纸本)0780387406

An essential goal in medical image registration is, the forward and reverse mapping matrices should be inverse to each other, i.e., inverse consistent. Conventional approaches enforce such consistency in deterministic fashions, either through incorporation of sub-objective cost function to impose consistent property during the registration process or by construction of consistent mapping on predetermined landmarks sets. Assuming that the initial forward and reverse matching matrices have been computed and used as the inputs to our system, this paper presents a stochastic framework which yields perfect consistent registration. During the optimization process to reach the perfect consistency, we model the errors of the registration matrices and the imperfectness of the consistent constraint as stochastic processes. An iterative generalized total least square (GTLS) strategy has been developed so that consistency is optimally imposed. © 2005 IEEE.

关键词： Image reconstruction

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Stochastic inverse consistency in medical image registration

Stochastic inverse consistency in medical image registration

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8th International Conference on Medical Image Computing and computer-Assisted Intervention - MICCAI 2005

作者： Yeung, Sai Kit Shi, Pengcheng Bioengineering Program Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong Department of Electrical and Electronic Engineering Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong

ISBN: (纸本)3540293264

An essential goal in medical image registration is, the forward and reverse mapping matrices should be inverse to each other, i.e., inverse consistency. Conventional approaches enforce consistency in deterministic fashions, through incorporation of sub-objective cost function to impose source-destination symmetric property during the registration process. Assuming that the initial forward and reverse matching matrices have been computed and used as the inputs to our system, this paper presents a stochastic framework which yields perfect inverse consistency with the simultaneous considerations of the errors underneath the registration matrices and the imperfectness of the consistent constraint. An iterative generalized total least square (GTLS) strategy has been developed such that the inverse consistency is optimally imposed. © Springer-Verlag Berlin Heidelberg 2005.

关键词： Medical imaging

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