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8th Annual Joint Conference of the IEEE computer and Communications Societies, INFOCOM'89

作者： Laih, Chi Sung Lee, Jau Yien Harn, Lein Chen, Chin Hsing Department of Electrical Engineering National Cheng Kung University Tainan Taiwan Computer Science Program University of Missouri Kansas City MO 64110 United States

ISBN: (纸本)0818619201

This paper proposes a new ID-based cryptographic scheme for implementing public-key cryptosystem and signature. Instead of generating and publishing a public key for each user, the ID-based scheme permits each user to choose his name or network address as his public key. This eliminates the needs of a large public-file and the exchange of private or public keys. The major advantage of the ID-based cryptosystem based on our scheme over other published ID-based crypto-systems is that the number of users can be extended to t *L users without degrading the system's security even when users cospire, where L is the number of the system's secrets and t is the number of factors in p-1. © 1989 IEEE.

关键词： Authentication

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A neural network approach to decomposing surface EMG signals

A neural network approach to decomposing surface EMG signals

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Midwest Symposium on Circuits and Systems (MWSCAS)

作者： D. Graupe R. Liu Department of Electrical Engineering and Computer Science and Department of Bioengineering University of Illinois Chicago USA Department of Electrical and Computer Engineering University of Notre Dame Notre Dame IN USA

A neural-network-based approach to decomposing surface EMG signals into a multitude of single muscle-fiber action potentials (SFAP) is presented. This decomposition is done to yield the signal forms of the SFAPs and to allow for localizing the particular SFAPs relative to the recording (surface) electrodes. The goal of this approach is to allow the physician or medical researcher to observe the waveforms of the electrical activity and to localize SFAPs below the surface of the skin in a noninvasive manner and without discomforting the patient, as is important for several neurological diagnostic purposes. The approach uses a Hopfield neural network in combination with a Kohonen network for discrimination and a conventional computer correlation algorithm.< >

关键词： Neural networks Electromyography Surface reconstruction Biomedical electrodes Medical diagnostic imaging Skin Hopfield neural networks Probability distribution Muscles Neurons

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Implementation of the conversion scheme in loosely coupled distributed computer systems

Implementation of the conversion scheme in loosely coupled d...

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International Conference on Distributed Computing Systems

作者： S.M. Yang K.H. Kim Computer Science Engineering Department University of Texas Arlington Arlington TX USA Computer Engineering Program Department of Electrical Engineering University of California Irvine CA USA

Several different approaches are discussed for implementing conversations in loosely coupled distributed computer systems (DCSs). Important implementation factors considered include the control of exits of processes on completion of their conversation tasks and the approach to execution of the conversation acceptance test. Two different exit control strategies, one in a synchronous manner and the other in an asynchronous manner, and three different approaches to execution of the conversation acceptance test, centralized, decentralized, and semi-centralized, are examined and compared in terms of system performance and implementation cost. The effectiveness of these execution approaches also depends on the way conversations are structured initially by program designers. Therefore, the two major types of conversation structures, name-linked recovery block and abstract data type conversations are examined to analyze which execution approaches are the most efficient for each conversation structure. These results provide guidelines for implementing conversations in loosely coupled DCSs.< >

关键词： Distributed computing Costs Distributed control System testing Contracts computer science Centralized control Control systems System performance Guidelines

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A new scheme for ID-based cryptosystem and signature

A new scheme for ID-based cryptosystem and signature

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IEEE Annual Joint Conference: INFOCOM, IEEE computer and Communications Societies

作者： C.S. Laih J.Y. Lee L. Harn C.H. Chen Department of Electrical Engineering National Cheng Kung University Tainan Taiwan Computer Science Program University of Missouri Kansas City MO USA

A novel ID-based cryptographic scheme for implementing a public-key cryptosystem and signature is proposed. Instead of generating and publishing a public key for each user, the ID-based scheme permits each user to choose his/her name or network address as his/her public key. This eliminates the needs of a large public field and the exchange of private or public keys. The major advantage of the ID-based cryptosystem based on this scheme over other published ID-based cryptosystems is that the number of users can be extended to t*L users without degrading the system's security even when users conspire, where L is the number of the system's secrets, and t is the number of factors in p-1, where p is a large prime number.< >

关键词： Identity-based encryption Public key cryptography Public key Information security Publishing Degradation Smart cards computer science Cities and towns

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Password authentication based on public-key distribution cryptosystem

Password authentication based on public-key distribution cry...

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International Conference on Data engineering

作者： L. Harn D. Huang C.-S. Laih Computer Science Program University of Missouri Kansas City Kansas City MO USA Department of Electrical Engineering National Cheng Kung University Tainan Taiwan

A password authentication mechanism based on the public-key distribution cryptosystem is proposed. The scheme uses an authentication table to replace the traditional password file. With this scheme, even if the authentication table is comprised, the system security is preserved. The user's password is effectively bound to the user's identification in a timely, efficient, and simple manner.< >

关键词： Authentication Public key Cryptography Protection Data security Information security Cities and towns Operating systems computer security computer networks

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Third-order optical susceptibility in short-period GaAs doping superlattices

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Journal of Applied Physics 1989年第9期66卷 4387-4392页

作者： Choquette, Kent D. McCaughan, Leon Misemer, D.K. Materials Science Program University of Wisconsin Madison WI 53706 United States Electrical and Computer Engineering Department University of Wisconsin Madison WI 53706 United States Basic Technologies/Corporate Research Laboratory 3M Company St. Paul MN 55144 United States

We propose that short-period doping superlattices are suitable for the enhancement of a third-order susceptibility arising from free carriers in nonparabolic energy subbands. The inherent advantage lies in the ability to simply engineer the superlattice potential profile, yielding control of miniband energy dispersion. We consider short-period GaAs doping superlattices composed of uniformly doped donor and acceptor layers, and planar-doped n- and p-type monolayers separated by intrinsic regions. Calculations of the electronic structure of compensated and n-type noncompensated n-i-p-i superlattices incorporating miniband dispersion at nonzero temperature are reported. We show that small modulations of the superlattice potential lead to large subband nonparabolicities and we calculate a twentyfold improvement in the third-order susceptibility over bulk GaAs at room temperature, comparable to that predicted for GaAs/AlGaAs compositional superlattices.

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THE AEGIS DATA BUS EXPERIMENT

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NAVAL ENGINEERS JOURNAL 1989年第5期101卷 53-58页

作者： FRINK, JG VERVEN, DM John G. Frink is an assistant group supervisor in the Fleet Systems Department of The Johns Hopkins University Applied Physics Laboratory. He received his B.S. degree in physics from Michigan State University in 1968 and the M.S. degree in computer science from the University of Maryland in 1971. Mr. Frink worked at the Naval Surface Weapons Center White Oak Laboratory on a variety of weapons systems before joining the Applied Physics Laboratory in 1978. Mr. Frink has supervised the development of a large scale battle group simulation that successfully employs the receiver selection paradigm described herein on a hardware suite composed of an extensible number of (currently 15) processors. David M. Verven is a senior electrical engineer in the Fleet Systems Department of The Johns Hopkins University Applied Physics Laboratory. He received the B.S. degree in electrical engineering from the University of Maryland College Park in 1979 and the M. S. degree in the same discipline from The Johns Hopkins University in 1984. Mr. Verven joined the Applied Physics Laboratory in 1979 and initially worked on analysis of Navy sensor systems. In 1981 he was the AN/SPS-49 test team leader for the New Threat Upgrade (NTU) combat system land-based test. In 1982 he became involved in the development of the BBWRS system. Currently he is involved in real-time computer program development for the CEP project.

This paper documents an experiment performed by The Johns Hopkins University Applied Physics Laboratory to measure the effect of inserting a data bus into a combat system. The experiment was conducted at the Aegis computer Center located at the Naval Surface Weapons Center in Dahlgren, Virginia (NSWC/DL). The purpose of the experiment was to determine whether or not the Aegis Weapon System (the core of the Aegis Combat System) could be operated with a portion of its point-to-point interelement cables replaced by a data bus. The data bus chosen for the experiment employs message broadcasting with receiver selection. A primary goal of the experiment was to minimize the amount of Aegis computer program changes required to accommodate the data bus. The results presented in this paper will show that the experiment was a success. Key certification tests were passed with no computer program changes to the tactical elements and minimal changes in the Aegis tactical executive (ATES) program (less than 110 words changed).

关键词： Data Transmission Equipment

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DETERMINATION OF electrical ADMITTANCES OF BIOLOGICAL CELLS

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JOURNAL OF ELECTROSTATICS 1988年第2-3期21卷 225-244页

作者： TAKASHIMA, S ASAMI, K YANTORNO, RE Department of Bioengineering University of Pennsylavania Philadelphia PA 19104-6392 U.S.A. Department of Electrical Engineering College of Engineering Computer Science and Architecture Temple University Philadelphia PA 19122 U.S.A.

The methods of impedance or admittance measurements are discussed for a variety of biological cells. The aim of this paper is the description of the techniques of measurements and the analysis of systematic errors arising from electrode arrangements and measuring systems. Detailed discussion on the nature of membrane admittance of biological cells can be found elsewhere.

关键词： BIOLOGICAL MATERIALS

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Modification operations in data base machines: Where are they? 88

Modification operations in data base machines: Where are the...

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16th ACM Annual Conference on computer science, CSC 1988

作者： Hurson, A.R. Miller, L.L. Department of Electrical Engineering Computer Engineering Program Pennsylvania State University University ParkPA16802 United States Department of Computer Science Iowa State University AmesIA50011 United States

ISBN: (纸本)0897912608

Advances in technology coupled with the inefficiency of the conventional von-Neumann type architecture in handling database systems have motivated the design and implementation of the so called database machines. Unfortunately, a majority of the proposed database machines have neglected to address proper procedures for modification operations. This negligence is partially due to the complexity of the operations and low performance of the database architectures in handling modification operations. First, the implementation of the modification operations in some database machines is overviewed. Second, we will address the mechanisms in which the relational database machine ASLM handles the modification operations. Finally, our approach is compared against the other proposed approaches in the literature. © 1988 ACM.

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Applications of signal and image processing to medicine

Applications of signal and image processing to medicine

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IEEE International Symposium on Circuits and Systems (ISCAS)

作者： D. Graupe Department of Electrical Engineering & Computer Science and Department of Bioengineering University of Illinois Chicago USA

A tutorial is presented on the applications of signal and image processing to medicine that covers both one- and multidimensional signals, such as EEG, ECG, IR, ultrasound signals, etc., and two- and three-dimensional images, such as CAT scanners, MRI magnetic resonance imaging, ultrasound images, holographic images, etc. The analysis problems covered range from the inverse scattering problem through signal/image enhancement in noise and filtering, parameter identification, pattern discrimination and recognition, coding, and data reduction to visualization and 3-D manipulation.< >

关键词： Signal processing Image processing Biomedical imaging Ultrasonic imaging Magnetic resonance imaging Multidimensional signal processing Electroencephalography Electrocardiography X-ray tomography Holography

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