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6th Annual Meeting of the IEEE Lasers-and-Electro-Optics-Society (LEOS 93)

作者： NORDIN, RA AT&T BELL LABS NAPERVILLE IL 60566 USA

ISBN: (纸本)0780312635

Demands for increased interconnection density and higher bandwidth, coupled with stringent cost constrains of advanced wide bandwidth telecommunication switching and high throughput computer architectures, are exhausting conventional electrical interconnection techniques. The requirement for greater interconnection performance, spawned in part by the advances in integrated circuit technologies and the need for enhanced digital services (such as multi media), dictate that technology advancement must occur in traditional electronic packaging and/or interconnection schemes. Presently, a `bottle-neck' occurs at the board-to-board level of the interconnection hierarchy. Therefore, an opportunity exists for the development of new parallel optical interconnection techniques which can be incorporated into system designs beginning at this interconnection level and beyond.

关键词： optical interconnects

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DECORATIVE HARD COATINGS - advances IN optical CHARACTERIZATION TECHNIQUES

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THIN SOLID FILMS 1993年第1-2期236卷 184-190页

作者： BECK, U REINERS, G WITT, K FED INST MAT RES & TESTING DEPT OPT PROPERTIES MAT & COLOUR METR 54D-12205 BERLINGERMANY

Transition metal compounds are finding increasing use in decorative coatings, combining intense colour, high wear resistance and good corrosion resistance. From the decorative point of view, colour and gloss are the most important features. The physiological colour impression is well described by the CIE-L*a*b colour space. Integrating sphere measurement (ISM) and goniospectroscopy (GS) derive colours from a measurement of the spectral reflectance factor R(lambda) relative to a white reference. Spectroscopic ellipsometry (SE) is a reference-free technique for measuring amplitude ratios and phase changes of polarized light upon specular reflectance. ISMs of (Zr,Y)N coatings are presented, which show considerable yellow and red values at intermediate lightnesses. The effect of the surface roughness is discussed for TiN coatings. The angular dependence of L*a*b* and the behaviour of R(lambda) are shown by means of GS for these TiN coatings in off-specular directions. These results of ISM and GS are compared with the SE data. The high sensitivity of SE to changes in stoichiometry as well as the capability of separating additional interference effects are demonstrated for (Zr,Cr)N and (Zr,Al)N coatings. However, it is shown especially in the case of rough surfaces that each technique is helpful in distinguishing features of physical and physiological interest.

关键词： Coatings

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Natl. storage Lab.: a collaborative research project

Natl. Storage Lab.: a collaborative research project

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Enabling Technologies for High-Bandwidth Applications

作者： Coyne, Robert A. Hulen, Harry Watson, Richard IBM Federal Systems Co. Houston TX USA

ISBN: (纸本)0819409642

The grand challenges of science and industry that are driving computing and communications have created corresponding challenges in information storage and retrieval. An industry-led collaborative project has been organized to investigate technology for storage systems that will be the future repositories of national information assets. Industry participants are IBM Federal Systems Company, Ampex Recording Systems Corporation, General Atomics DISCOS Division, IBM ADSTAR, Maximum Strategy Corporation, Network Systems Corporation, and Zitel Corporation. Industry members of the collaborative project are funding their own participation. Lawrence Livermore National Laboratory through its National Energy Research Supercomputer Center (NERSC) will participate in the project as the operational site and provider of applications. The expected result is the creation of a National storage Laboratory to serve as a prototype and demonstration facility. It is expected that this prototype will represent a significant advance in the technology for distributed storage systems capable of handling gigabyte-class files at gigabit-per-second data rates. Specifically, the collaboration expects to make significant advances in hardware, software, and systems technology in four areas of need, (1) network-attached high performance storage;(2) multiple, dynamic, distributed storage hierarchies;(3) layered access to storage system services;and (4) storage system management.

关键词： Information retrieval systems

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A SOFTWARE FRAMEWORK FOR AN APPLICATION-DRIVEN INTERACTIVE PARALLEL IMAGE-PROCESSING AND DISPLAY SYSTEM (PIPADS)

A SOFTWARE FRAMEWORK FOR AN APPLICATION-DRIVEN INTERACTIVE P...

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conference on Recent advances in Sensors, Radiometric Calibration, and Processing of Remotely Sensed data

作者： KEIGHTLEY, D KRAVIS, S LILLEYMAN, J TSUI, K MOORE, K CSIRO DIV INFORMAT TECHNOLCANBERRAACT 2601AUSTRALIA

ISBN: (纸本)0819411744

PIPADS is a vertically integrated parallel image processing and display system designed for interactive visualisation and processing of large geosdentific data sets arising from remote sensing or computational modelling. Applications include perspective views of digital terrain models and other image surfaces, interactive image warping, volume visualisation and seismic data processing. The PIPADS system consists of a layered object oriented software framework resident on a Unix workstation host and a high-performance modular hardware sub-system. The design was driven by the requirements of interactive visualisation and image processing using a class of highly parallel and regular image-space algorithms, known as scan-line algorithms. The software control structure allows both asynchronous and synchronous communications from the host application to the compute/display server and allows tuning for minimal latency between the user-interaction and the resulting change in data view. © 1993 SPIE. All rights reserved.

关键词： data handling

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Procedure for minimum distortion and minimum storage needs for digitized random analog data

Procedure for minimum distortion and minimum storage needs f...

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Fifth International conference on Laser Anemometry

作者： Bessem, J.M. van Maanen, H.R.E. Univ of Technology Delft Netherlands

The acquisition and digital storage of analog turbulent signals is optimized with respect to minimal data handling. A best anti-aliasing filter and optimum settings of the A/D converter are found by simulating a turbu... 详细信息

ISBN: (纸本)0819413119

关键词： Analog to digital conversion

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MODELS FOR FIBER RELIABILITY

MODELS FOR FIBER RELIABILITY

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conference on Passive Fiber Optic Components and Their Reliability

作者： MATTHEWSON, MJ RUTGERS STATE UNIV DEPT CERAM SCI & ENGNFIBER OPT MAT RES PROGRAMPISCATAWAYNJ 08855

ISBN: (纸本)0819412198

Current models for optical fiber reliability are mostly based upon power law growth kinetics of sharp, stress-free cracks. The physical basis of these models is critically examined and is found to have limitations in describing the behavior of both high strength `pristine' fiber and weak fiber. In particular, the models do not account for the abrupt strength loss sometimes observed in harsh environments for both types of fiber. Recent advances in understanding the behavior of such fibers are discussed. In particular the addition of colloidal silica particles to the coating material is shown to dramatically improve reliability.

关键词： Reliability Coating Silica Particles Liquids optical fibers Mathematical modeling Fiber coatings data modeling Nitrogen

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Authoring tool for hypermedia medical record 1

Authoring tool for hypermedia medical record

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1st International conference on Multi-Media Modeling, MMM 1993

作者： Ip, Horace H. S. Chan, Siu Lok Law, Ken C. K. Image Computing Group Department of Computer Science City Polytechnic of Hong Kong 83 Tat Chee Avenue Kowloon Hong Kong

ISBN: (纸本)9810215185

A medical record consists of heterogeneous types of data generated from different diagnostic and monitoring modalities. advances in multimedia technology have made possible the capturing, storage and visualisation of such multimedia documents. By incorporating hypermedia concept into the structure of the document, the physician is able to retrieve and view relevant information non-linearly via the hyperlinks embedded within the document To computerize such documents requires not only the design of a good storage and presentation mechanism but also a suitable way to convert various media data into a hypermedia document architecture. This paper presents the authoring tools for a medical document system, HyCard, which had been implemented on a PC window-based platform. The authoring tool is flexible and easy-to-use for non-technical users. © Proceedings of the 1st International conference on Multi-Media Modeling, MMM 1993. All rights reserved.

关键词： Digital storage

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SCANNING CAPACITANCE DETECTION AND CHARGE TRAPPING IN NOS 2

SCANNING CAPACITANCE DETECTION AND CHARGE TRAPPING IN NOS

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conference on Scanning Probe Microscopies II

作者： TERRIS, BD BARRETT, RC MAMIN, HJ IBM CORP DIV RESALMADEN RES CTRSAN JOSECA 95120

ISBN: (纸本)0819410810

Charge trapping in thin films of silicon nitride has long been studied for use as a non-volatile semiconductor memory. Recently, this technology has been combined with scanned probe technologies with the sharp probe tip serving as the upper electrode in a Si₃N₄- SiO₂Si (NOS) structure. By applying a voltage pulse between the tip and silicon substrate, charge carriers can be made to tunnel through the oxide and be trapped in the nitride. This trapped charge causes a shift in the capacitance-voltage curve along the voltage axis; the voltage at which depletion occurs is increased. It has been proposed that such a system could be used as a high density data storage device. We have begun to explore some of the issues related to such an application, including data lifetime and data rates. In thermally accelerated life tests, no sign of charge spreading was seen after 100 days at 150 degree(s)C and from the rate of charge decay we would predict room temperature lifetimes in excess of 1 million years. We have also used an air-bearing spindle to conduct high speed measurements on a spinning NOS sample and obtained data rates as high as 500 kHz with carrier-to-noise ratios of approximately 60 dB in a 3 kHz bandwidth.

关键词： Silicon Capacitance Electrodes data storage Spindles Oxides Scanners Sensors Signal detection Thin films

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IMPLEMENTING NEURAL NETS ON NONIDEAL ANALOG HARDWARE

IMPLEMENTING NEURAL NETS ON NONIDEAL ANALOG HARDWARE

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conference on Photonics for Processors, Neural Networks, and Memories

作者： NEIBERG, L CASASENT, DP CARNEGIE MELLON UNIV CTR EXCELLENCE OPT DATA PROCDEPT ELECT & COMP ENGNPITTSBURGHPA 15213

ISBN: (纸本)0819412759

We consider the implementation of high capacity Ho-Kashyap associative processors on non- ideal optical and analog VLSI systems. Processor non-idealities considered include quantization, non-uniform beam illumination, and nonlinear device characteristics. New training-out techniques to overcome these non-idealities are advanced. We obtain optimal performance in the presence of stochastic noise by proper selection of the processor parameter (sigma) _syn. We derive important results that allow us to a priori determine the optimal value of (sigma) _syn and the expected recall accuracy P'_c without having to simulate the specific processor. We present a new algorithm that allow us to achieve storage near the theoretical maximum capacity (2N, where N is the dimensionality of the input vector) with excellent recall accuracy. optical laboratory results are included. We achieved storage of 1.5 N with recall accuracy P'_c >= 95% with input noise of standard deviation (omega) ₁ equals 0.02 present and with optical analog components with 5 bit input accuracy and 8 bit memory matrix accuracy. With higher accuracy analog VLSI components (10 bit input accuracy and 11 bit weight accuracy), we achieve storage of 1.75 N with P'_c equals 96.43%.

关键词： Analog electronics Very large scale integration Quantization Error analysis Neurons Stochastic processes Neural networks optical components Computer simulations Nonlinear optics

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MODELING SPECTRALONS BIDIRECTIONAL REFLECTANCE FOR IN-FLIGHT CALIBRATION OF EARTH-ORBITING SENSORS

MODELING SPECTRALONS BIDIRECTIONAL REFLECTANCE FOR IN-FLIGHT...

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conference on Recent advances in Sensors, Radiometric Calibration, and Processing of Remotely Sensed data

作者： FLASSE, SP VERSTRAETE, MM PINTY, B BRUEGGE, CJ CEC JOINT RES CTR INST REMOTE SENSING APPLICATI-21020 ISPRAITALY

ISBN: (纸本)0819411744

The in-flight calibration of the EOS Multi-angle Imaging SpectroRadiometer (MISR) will be achieved, in part, by observing deployable Spectralon panels. This material reflects light diffusely, and allows all cameras to view a near constant radiance field. This is particularly true when a panel is illuminated near the surface normal. To meet the challenging MISR calibration requirements, however, very accurate knowledge of the panel reflectance must be known for all utilized angles of illumination, and for all camera and monitoring photodiode view angles. It is believed that model predictions of the panels bidirectional reflectance distribution function (BRDF) can be used in conjunction with a measurements program to provide the required characterization. This paper describes the results of a model inversion which was conducted using measured Spectralon BRDF data at several illumination angles. Four physical parameters of the material were retrieved, and are available for use with the model to predict reflectance for any arbitrary illumination or view angle. With these data the root mean square difference between the model and the observations is currently of the order of the noise in the data, at about +/- 1%. With this success the model will now be used in a variety of future studies, including the development of a measurements test plan, the validation of these data, and the prediction of a new BRDF profile, should the material degrade in space.

关键词： data modeling Reflectivity Bidirectional reflectance transmission function Calibration Cameras Diodes Sensors Polarization Anisotropy Sensor calibration

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