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Electro-Optic Computer Peripherals technology

作者： Lean, Eric G. Yorktown Heights NY USA

ISBN: (纸本)0819410160

Information storage in DASDs is a key part of a computer system. The worldwide revenue opportunity for DASD products is more than $50 billion. In order to meet the ever-increasing demand in capacity, performance, and cost-savings, rapid technological advances in magnetic recording have been carried out in laboratories around the world. The recent development for laptop and notepad PCs further demands the need for low power and smaller files. The technology trends in magnetic recording in terms of areal density, volumetric efficiency, and material advances based on published data are reviewed. optical storage including read-only, write-once, and read/write drives becomes an emerging technology with a removability feature, which may complement magnetic recording DASDs. The recent advances in optical storage media and drives and their comparisons with magnetic recording technology are discussed.

关键词： data recording

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Network attached peripherals in a high-performance file-serving environment

Network attached peripherals in a high-performance file-serv...

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Enabling Technologies for High-Bandwidth Applications

作者： McClain, Fred W. General Atomics San Diego CA USA

ISBN: (纸本)0819409642

Among the many advances in computer technology in recent years, one significant development has been the use of networks as a means of sharing resources among multiple computer systems. Despite the considerable successes achieved on this front, limitations have become apparent in the current generation of network-based resource sharing technology. The recent introduction of gigabit-per-second local area networking and high-performance storage device technologies now provide the basis for a new class of networked system. Our recent efforts have involved realizing a system which supports resource sharing among computer systems in a very high performance network- based environment. Developments range from integration of the HIPPI-based networked systems to new protocols for data transport to the incorporation of the UniTree system as the coordinating entity for system-wide storage and file management. This paper presents an overview of considerations for this style of network-based resource sharing.

关键词： optical data processing

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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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The Department of Energy's Ground Penetrating Radar (GPR), an FM-CW system

The Department of Energy's Ground Penetrating Radar (GPR), a...

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Underground and Obscured Object Imaging and Detection 1993

作者： Koppenjan, Steven Bashforth, Michael Special Technologies Laboratory 5520 Ekwill Street Santa BarbaraCA93111 United States

The United States Department of Energy's Special Technologies Laboratory (STL) has been actively involved with ground penetrating radar technology since 1968. Throughout this time period, a variety of technical approaches have been evaluated to detect and image subsurface objects. The ground penetrating radar concept differs significantly from a conventional radar primarily because of the short range of the targets and the lossy propagation media. A ground penetrating radar will utilize the reflective properties of various dielectric interfaces and nonhomogeneous materials in the soil to obtain target information. The production of total site characterization data will require implementation of advanced imaging techniques and data fusion. The success of these innovative methods will require highly accurate detection and delineation of subsurface objects. To meet these new technical requirements for high resolution data, STL is moving forward with advances to GPR technology with development of a stepped FM-CW Ground Penetrating Radar. This unit operates over a frequency range of 196 MHz to 708 MHz and produces phase-coherent data. It has a real-time display of data, saves the data to floppy discs and can also produce hard copies in the field. This system has successfully detected targets ranging from 60 mm projectiles to 500 pound bombs up to 15 feet deep. Additional field deployment of the GPR produced successful results on other metallic and nonmetallic targets. This paper outlines the theory of operation of a Stepped Frequency Modulated, Continuous-Wave (FM-CW) Ground Penetrating Radar, provides a technical description of the unit, data display format and presents some sample data sets. © 1993 SPIE. All rights reserved.

关键词： Floppy disk storage

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Shaping the distributed end-system for global distributed applications

Shaping the distributed end-system for global distributed ap...

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Proceedings of the Global data Networking

作者： S. Covaci R. Popescu-Zeletin GMD-Fokus De Te Berkom TU Berlin Berlin Germany

advances in optical networking technology provide the network with unique storage capabilities enabling the creation of a physical shared memory in a wide area distributed system. This has implications on the overall systems' architecture as well as on the host. From the user perspective the end-system will be shaped by the application and become a global distributed shared-memory multiprocessor. In this paper we propose a memory building block based on optical networking technology that we further use in devising a multiprocessor host architecture. A hierarchical memory architecture that ensures scalability and allows multiple copies of a shared object is adopted. The architecture favours hardware solutions for enforcing cache coherence by exploiting the intrinsic broadcast capability of the new memory module. The interprocess communication system suitable for such an environment is analysed in order to achieve functional transparency for applications ported from a multicomputer to a multiprocessor, and issues related to performance transparency when dealing with long light-propagation latency are addressed. With this processing-communication paradigm, the host-network interface simply provides a direct path between the host-memory and the external network-memory.< >

关键词： optical fiber networks High speed optical techniques Broadcasting Delay Tellurium Scalability Performance analysis data processing data communication Memory architecture

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Researchers look to optics to move computer technology forward

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Computers in physics 1992年第6期6卷 594-602页

作者： McAulay, Alastair D. Lehigh Univ United States

Recent advances have made optical data links reality and point the way toward broader optics applications in the computers of the future. Researchers have investigated both analog and digital computing devices and reported wide-ranging progress, particularly in the areas of communication and secondary data storage such as fiber links and CR ROMs. The author summarizes progress in this field.

关键词： optical data processing

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Advanced magneto-optic spatial light modulator device development update

Advanced magneto-optic spatial light modulator device develo...

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advances in optical Information Processing V

作者： Ross, William E. Cho, Jaekyong Farmer, Alan Lambeth, David N. Le, Tan Santhanam, Suresh Stancil, Daniel D. Litton Data Systems Van Nuys CA USA

ISBN: (纸本)0819408697

The advanced development and characteristics of a new high resolution, high frame rate, reflected mode MOSLM is reported. This effort is aimed at the production of Miniature Ruggedized optical Correlators. The device research and process development is being performed at Carnegie Mellon University NSF data storage System Center (formerly Magnetic technology Center) under contract from Litton data Systems. Pixel size is under one mil center to center, one third the dimension of present transmission mode evaluation devices. This development includes optimization of the optical and functional characteristics of the MOSLM for Mil Spec Systems.

关键词： Light modulators

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CHARACTERIZATION OF HIGH-SPEED VIDEO SYSTEMS - TESTS AND ANALYSES

CHARACTERIZATION OF HIGH-SPEED VIDEO SYSTEMS - TESTS AND ANA...

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CONF ON ULTRAHIGH-SPEED AND HIGH-SPEED PHOTOGRAPHY, VIDEOGRAPHY, AND PHOTONICS

作者： CARLTON, PN CHENETTE, ER ROWE, WJ SNYDER, DR Sverdrup Technology Inc. (United States) Wright Lab. (United States)

ISBN: (纸本)0819406678

The current method of munitions systems testing uses film cameras to record airborne events such as store separation. After film exposure, much time is spent in developing the film and analyzing the images. If the analysis uses digital methods, additional time is required to digitize the images preparatory to the analysis phase. Because airborne equipment parameters such as exposure time cannot be adjusted in flight, images often suffer as a result of changing lighting conditions. Image degradation from other sources may occur in the film development process, and during digitizing. advances in the design of charge-coupled device (CCD) cameras and mass storage devices, coupled with sophisticated data compression and transmission systems, provide the means to overcome these shortcomings. A system can be developed where the image sensor provides an analog electronic signal and, consequently, images can be digitized and stored using digital mass storage devices or transmitted to a ground station for immediate viewing and analysis. All electronic imaging and processing offers the potential for improved data quality, rapid response time and closed loop operation. This paper examines high speed, high resolution imaging system design issues assuming an electronic image sensor will be used. Experimental data and analyses are presented on the resolution capability of current film and digital image processing technology. Electrical power dissipation in a high speed, high resolution CCD array is also analyzed.

关键词： Clocks Staring arrays Modulation transfer functions Imaging systems Cameras Image resolution Spatial frequencies optical filters High speed photography Video

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optical recording drives diode-laser technology

Laser Focus (Littleton, Massachusetts)

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Laser Focus (Littleton, Massachusetts) 1992年第7期28卷

作者： Carlin, Donald B. David Sarnoff Research Cent Princeton United States

Compact-disk players and writable optical data-storage systems demand improved diode-laser technology. Technical advances will enhance data-recording systems.

关键词： Semiconductor Lasers

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advances IN HOLOGRAPHIC LITHOGRAPHY

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SOLID STATE technology 1991年第9期34卷 89-93页

作者： OMAR, BA CLUBE, F HAMIDI, M STRUCHEN, D GRAY, S Holtronic Technologies Ltd Neuchatel Switzerland

Total internal reflection holography has been demonstrated as a technique for submicrometer lithography: A prototype system is described which is capable of printing 0.3-mu-m features over a very large field. Applicat... 详细信息

关键词： Lithography

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