As the computer industry has grown in experience and application, there is an area which has received much attention; that is, the area of managing, organizing and storing data. Problems of reliability, security and timeliness with data have drawn almost every computer user's attention. Since the late 60's, there has been a growing interest in providing software which separates (at a cost) the manipulation aspect from usual organizational and accounting functions found in a normal program. Such...
Topics: DTIC Archive, Fisher,Paul S, KANSAS STATE UNIV MANHATTAN DEPT OF COMPUTER SCIENCE, *DATA BASES,...
For the past two decades optical data processing (ODP) has promised a vast increase in processing capacity and speed over conventional electronic techniques. This promise has never been fulfilled for several reasons, most notably because of the lack of a practical real-time image modulator, or light valve, and because optical techniques were almost exclusively limited to linear operations. These restrictions have been removed by the development of the liquid-crystal light valve (LCLV) by Hughes...
Topics: DTIC Archive, Soffer,B H, HUGHES RESEARCH LABS MALIBU CA, *OPTICAL DATA, *LIQUID CRYSTALS, *IMAGES,...
This report covers the work performed by General Electric Ordnance Systems Division pertaining to the electrical characterization and specification of interface types of microcircuits. The period of report is January 1980 to January 1981. The main thrust of this electrical characterization effort was directed at high military usage peripheral and core drivers and multiplying CMOS digital to analog converters. The following device types were evaluated: Peripheral Drivers - 55450 and 55460;...
Topics: DTIC Archive, Kulpinski,John S, GENERAL ELECTRIC CO PITTSFIELD MA ORDNANCE SYSTEMS, *MICROCIRCUITS,...
The survival of data in a memory through very high levels of transient ionizing radiation ( 10 to the 11th power rads(Si)/sec) has been a very difficult problem. This report describes the principles used in the design of a hardened memory, using CMOS/SOS technology. The design also provides high packing density (1024 bits in less than 16000 sq mils), high speed (cycle time or = 350 nsec), low power ( 50 mW) and ease of use (16 pin packaging with a single-chip enable clock). (Author)
Topics: DTIC Archive, Nielsen,Robert L, ROCKWELL INTERNATIONAL ANAHEIM CALIF, *MEMORY DEVICES,...
See AD-A049 813 for abstract.
Topics: DTIC Archive, Peters,L S, STANFORD RESEARCH INST MENLO PARK CALIF, *DATA PROCESSING, *MANAGEMENT...
The overall goal of this research project is to systematically investigate a number of the possible through which presynaptic modulation might influence the effectiveness of local synaptic interactions at the mammalian hippocampal mossy fiber synapse. The potential significance of this research has been dramatically highlighted by the events of this past year, in which several different laboratories conclusively demonstrated that long-term potentiation (LTP) in the mossy fiber-CA3 synapse...
Topics: DTIC Archive, Terrian, David M, EAST CAROLINA UNIV SCHOOL OF MEDICINE GREENVILLE NC, *FIBERS,...
This paper investigates individual differences in learning Pascal programming skills using an intelligent tutoring system for learning criterion task. Data were collected from 260 subjects in the following categories: (a) incoming general and domain-specific knowledge; (b) cognitive ability measures (working memory capacity and information processing speed); (c) learning process measures (declarative and procedural); (d) transfer measures (retention, application, and generalization). Casual...
Topics: DTIC Archive, Shute, Valerie J, AIR FORCE HUMAN RESOURCES LAB BROOKS AFB TX, *PERFORMANCE(HUMAN),...
The software system, TRAFFIC, was developed to provide technical information and literature on the physical effects of navigation traffic, particularly on selected riverine organisms. The TRAFFIC software program has been designed to run on an IBM-PR or compatible microcomputer with a minimum of 256 K of computer memory and type of video card and monitor. TRAFFIC is easy to use and requires no knowledge of computers. Depending upon the program selections made by the user, either a bibliographic...
Topics: DTIC Archive, Way, Carl M, ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS ENVIRONMENTAL...
The Gallium Arsenide Pilot Line for High Performance Components (Pilot Line III) is to develop a facility for the fabrication of GaAs logic and memory chips. We have completed the first thirty-six months of this contract, and this report covers the period from September 25, 1989, through March 25, 1990. All the elements of this program are now in place. HCAD, our 'User Friendly' CAD system, is complete; it was used to design two successful circuits- the Standard Cell Transversal Filter Chip...
Topics: DTIC Archive, Vehse, Robert C, AT AND T BELL LABS READING PA, *POWER SUPPLIES, *CHIPS(ELECTRONICS),...
The goal of the project is to define the mechanisms responsible for inducing, expressing, and stabilizing long-term synaptic potentiation (LTP), a form of physiological plasticity that is likely to be responsible for the encoding of memory in telencephalic networks. Studies in the past year defined the cellular changes likely to be responsible for expressions. The nootropic ('cognitive enhancing') drug aniracetam prolongs the open time of post-synaptic receptors mediating fast synaptic...
Topics: DTIC Archive, Lynch, Gary, CALIFORNIA UNIV IRVINE CENTER FOR THE NEUROBIOLOGY OF LEARNING AND...
A procedure to support parallel refinement and redistribution of two dimensional unstructured finite element meshes on distributed memory computers is presented. The procedure uses the mesh topological entity hierarchy as the underlying data structures to easily support the required adjacency information. Mesh refinement is done by employing links back to the geometric representation to place new nodes on the boundary of the domain directly on the curved geometry. The refined mesh is then...
Topics: DTIC Archive, Ozturan, C., RENSSELAER POLYTECHNIC INST TROY NY, *FINITE ELEMENT ANALYSIS, *PARALLEL...
A New positive electron resist (TI-313) has been implemented for fabrication of 256-bit bipolar RAMs. This TI-313 resist has allowed plasma etching at each oxide removal step in the process. The pinhole data on this resist after oxide etch is comparable with that measured on the best standard negative photoresists. Previous attempts at fabricating the 256-bit bipolar RAMs have failed due to the high number of defects in the oxide caused by an inherent problem with PBS electron resist during wet...
Topics: DTIC Archive, Varnell,Gilbert L, TEXAS INSTRUMENTS INC DALLAS, *INTEGRATED CIRCUITS, *ETCHING,...
While good gate level and register transfer level digital simulators exist, one can not easily integrate the two due to their inherent limitations. A given simulation can not be described partially in gate level and partially in a higher level. A solution is to create a functional level preprocessor and a library of functional device models linked to a gate level simulator's input language. This permits the mixing of behavioral models with gate level models in the same system structure. The...
Topics: DTIC Archive, Raeth,Peter G, AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING,...
The storage and retrieval pf patterns in a Hopfield-like Parallel Distributed Memory is investigated experimentally with a view toward increasing its storage capacity. The first two Chapters gives an overview of distributed memories and in particular the Hopfield distributed memory. This is followed by a Chapter which experimentally identifies the basic storage capacity of the original Hopfield memory when using text patterns. this discussion then experimentally investigates new and untested...
Topics: DTIC Archive, Potter, Terry W, BROWN UNIV PROVIDENCE RI CENTER FOR NEURAL SCIENCE, *DISTRIBUTED...
Integrated multicomputer systems consist a set of loosely coupled processors, each with its own local memory, into a single machine environment. In the distributed systems model, various user processes may run concurrently on different machines and possibly communicate to achieve a common goal. This form of concurrency encourages a programming style that uses large grain-size computation blocks. Such distributed programs consist of a set of execution entities (called threads or tasks) that...
Topics: DTIC Archive, Barak, Amnon, HEBREW UNIV JERUSALEM (ISRAEL) DEPT OF COMPUTER SCIENCE, *INTEGRATED...
Memory is an elusive human ability which both helps and hinders air traffic controllers' performance. This document was developed based on the ideas of controllers themselves when they were asked what they did to manage their memory resources. The guide is a job aide meant to help controllers think about what they do and about the little things they could use to help them reduce the possibilities for errors based on memory lapses. The material is presented in graphical cartoon format along with...
Topics: DTIC Archive, Stein, Earl S., FEDERAL AVIATION ADMINISTRATION TECHNICAL CENTER ATLANTIC CITY NJ,...
Approximately 700,000 U.S. servicemembers served in the Persian Gulf during some point from August 1990 to June 1991. According to DOD, the majority of these personnel returned from the war healthy and remain fit for duty today. However, many of these servicemembers are reporting a wide array of health complaints and disabling conditions, including fatigue, muscle and joint pain, memory loss, and severe headaches. in response to concerns about the servicemembers with these symptoms and the...
Topics: DTIC Archive, Schuster, Carol R., GENERAL ACCOUNTING OFFICE WASHINGTON DC NATIONAL SECURITY AND...
We report the results of Phase I efforts to realize reconfigurable photonic systems relying on optical bistability in microring and microdisk structures. These reconfigurable systems that can function as optical memory elements are expected to have applications in all-optical signal processors. Hybrid Photonics investigated optical bistable devices based on novel physical principles, which distinguish our efforts from all previously suggested approaches. Two configurations were studied: (i) two...
Topics: DTIC Archive, HYBRID PHOTONICS LLC ALBERTSON NY, *OPTICAL EQUIPMENT, *RESONATORS, *QUANTUM DOTS,...
While good gate level and register transfer level digital simulators exist, one can not easily integrate the two due to their inherent limitations. A given simulation can not be described partially in gate level and partially in a higher level. A solution is to create a functional level preprocessor and a library of functional device models linked to a gate level simulator's input language. This permits the mixing of behavioral models with gate level models in the same system structure. The...
Topics: DTIC Archive, Raeth,Peter G, AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING,...
This report documents the design definition, implementation, and test of a User Oriented MIL-STD-1750 Microcomputer and Monitor System. The system design incorporates several experimental features to enhance program development and measurement in an avionics integration laboratory environment, the most noteworthy of which is a monitor real time memory map function. (Author)
Topics: DTIC Archive, Stark, John W, SINGER CO WAYNE NJ, *MONITORING, *INPUT OUTPUT DEVICES,...
Activities in the following areas are summarized: Data systems (digital computers, computer components, psychology, computer systems); Radio physics (surveillance techniques); Radar (microwave components); Engineering (mechanical engineering, physical plant engineering, control systems); Solid state.
Topics: DTIC Archive, Frick, Frederick C, MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB, *RADIO...
The Simulated Warfare Environment Data Transfer (SWEDAT) is a shared memory interface currently managed by the Joint Integrated Mission Model (JIMM). It allows integrated operation of resources whereby the JIMM threat environment, stimulators virtual cockpits, systems under test, and other agents are combined within the same simulation exercise. The Air Combat Environment Test and Evaluation Facility (ACETEF), the Joint Strike Fighter (JSF) Program, and other agencies use it extensively for...
Topics: DTIC Archive, Mutschler, David W, NAVAL AIR SYSTEMS COMMAND PATUXENT RIVER MD, *SIMULATION,...
The Venus Operating System is an experimental multiprogramming system which supports five or six concurrent users on a small computer. The system is defined by a combination of microprograms and software. The paper describes the development of the system, with particular emphasis on the principles which guided the design.
Topics: DTIC Archive, Liskov, Barbara H, MITRE CORP BEDFORD MA, *DATA PROCESSING EQUIPMENT, MEMORY DEVICES,...
This report presents the current status of the Information Data Exchange Experimental Activities (IDEEA) Network. The Network is being developed at Frankford Arsenal for the U. S. Army Information Systems Office (CRDIS-O). A description is given of the IDEEA console equipment, internal signal flows, and the console as a systems element. Recommendations and conclusions concerning the IDEEA console and its equipment are also presented in this report.
Topics: DTIC Archive, Meenan, Robert J, FRANKFORD ARSENAL PHILADELPHIA PA, *CHEMISTRY, *INFORMATION...
Special equipment for measuring the computing power of a complex of computers in the DABS (Discrete Address Beacon System) is described. (Author)
Topics: DTIC Archive, Dumanian,John, Clapp,David, TRANSPORTATION SYSTEMS CENTER CAMBRIDGE MASS, *COMPUTER...
This paper describes the performance optimization in software and hardware solutions for a cognitive computing model called Brain State in a Box (BSB). This BSB model is implemented using two different configurations of the proposed architecture. The first implementation is a software only approach using the Cell Broadband Engine. The other implementation is a hybrid configurable computing platform which uses Field Programmable Gate Array (FPGA) for implementing the computation. To compensate...
Topics: DTIC Archive, AIR FORCE RESEARCH LAB ROME NY INFORMATION DIRECTORATE, *NEURAL NETS, *MEMORY...
Previous research has validated the concept of Embedded Training (ET) by installing a powerful, machine transportable Computer Assisted Instructional (CAI) authoring language and software system known as PLANIT (Programming LANguage for Interactive Teaching) on the Field Artillery's Tactical Fire Direction Computer System (TACFIRE). Subsequent research demonstrated that the same hardware and software could be used for the administration of an embedded Skill Qualification Test (SQT). The purpose...
Topics: DTIC Archive, Frye, Charles H, BATTELLE COLUMBUS LABS RESEARCH TRIANGLE PARK NC, *ADAPTIVE...
A programmable maintenance processor concept applicable to multiprocessing systems has been developed at the NASA Ames Research Center's Dryden Flight Research Facility. This stand-alone-processor is intended to provide support for system and application software testing as well as hardware diagnostics. An initial machanization has been incorporated into the extended aircraft interrogation and display system (XAIDS) which is multiprocessing general-purpose ground support equipment. The XAIDS...
Topics: NASA Technical Reports Server (NTRS), APPLICATIONS PROGRAMS (COMPUTERS), COMPUTER PROGRAMMING,...
Kolence's theory of the performance of computing systems is restated. In this development, the basic subsystems are reduced to two: logical subconfigurations and software units. These and the three fundamental variables, work, time and storage occupancy are all defined using as a basis a single logical construct, the set of instantaneous descriptions of instruction executions. Basic results are given for time relationships (utilizations and concurrency levels), work relationships (distribution...
Topics: DTIC Archive, Kovach,R P, INSTITUTE FOR SOFTWARE ENGINEERING PALO ALTO CA, *MATHEMATICAL MODELS,...
A memory management scheme which incorporates an additional level of memory into the traditional primary-secondary storage hierarchy is proposed for utilization in distributed data base management systems. In this scheme, the memory of the back-end processor is used as an additional memory buffer. An optimal three-level memory management algorithm is presented along with an analysis of its cost in terms of page replacement. The expected performance improvement over the optimal algorithm for a...
Topics: DTIC Archive, Maryanski,Fred J, KANSAS STATE UNIV MANHATTAN DEPT OF COMPUTER SCIENCE, *DATA...
The Operational Test and Evaluation Support Tool (OPS TEST) is an automated repository of training and evaluation test items and tests that was developed by the United States Air Force Academy's Institute for Information Technology Applications (IITA). It is made freely available to Department of Defense and other US Government agencies. This volume of OPS TEST documentation provides information on using OPS TEST for taking tests on-line. Specific testtaking functions provided are: Ability of...
Topics: DTIC Archive, Hadfield, Steven M, AIR FORCE ACADEMY COLORADO SPRINGS CO INST FOR INFORMATION...
This paper describes the measurement and analysis of hard CPU and memory errors, and system activity at the Stanford Linear Accelerator Center computational facility. Nearly 25 percent of the errors were estimated to be permanent. The occurrence of a failure was found to be strongly correlated with the level and type of workload prior to the occurrence of the failure. For example, it is shown that the risk of a permanent error increases in a non-linear fashion with the amount of interactive...
Topics: DTIC Archive, Iyer,Ravishankar K, STANFORD UNIV CA CENTER FOR RELIABLE COMPUTING, *Systems...
Three studies of temporal pattern perception were conducted. The listener's task was to determine whether or not two arrhythmic, tonal sequences formed the same temporal pattern. The first study tested the Pattern Correlation model. According to this model, the listener estimates the correlation between the pattern of time intervals marked by the tones in each sequence. Listener performance was characterized by an internal noise that is dependent on the average time between marker tones. The...
Topics: DTIC Archive, Sorkin, Robert D, FLORIDA UNIV GAINESVILLE DEPT OF PSYCHOLOGY, *MEMORY DEVICES,...
The influence of illumination and annealing on thin films of amorphous As2Se3 and As2S3 has been studied through their effects on the structure and optical properties. It is shown that the dominant photostructural change in evaporated films is the polymerization of the as-deposited molecular (As4S6 or As4Se6) glass through either illumination or heating. This irreversible polymerization gives rise to a large absorption edge shift to smaller energy and to an appreciable index of refraction...
Topics: DTIC Archive, DeNeufville, John P, ENERGY CONVERSION DEVICES INC TROY MI, *SEMICONDUCTORS,...
This report describes the implementation of a recursive, stochastic algorithm, the Least-Mean-Square (LMS) Error algorithm, in a 16-tap weight CCD monolithic analog adaptive filter with electrically-reprogrammable MOS analog conductance weights. The analog and digital peripheral MOS on-chip circuits are provided with CMOS technology. (Author)
Topics: DTIC Archive, White,Marvin H, WESTINGHOUSE DEFENSE AND ELECTRONIC SYSTEMS CENTER BALTIMORE MD...
The goal of this project is to examine the consequences of observer motion for visual function. The research has focussed on two issues: One issue is how a grossly time-varying retinal input (because of eye, head, and body notion) results in the perception of a continuous and directionally stable visual world. A second issue concerns how the information in successive views is related, and the nature of the visual information retained from previous views. Understanding these processes is...
Topics: DTIC Archive, Hayhoe, Mary M., ROCHESTER UNIV NY CENTER FOR VISUAL SCIENCE, *FRAMES, *VISION,...
Most specifications of garbage collectors concentrate on the low-level algorithmic details of how to find and preserve accessible objects. Often, they focus on bit-level manipulations such as 'scanning stack frames,' 'marking objects,' 'tagging data,' etc. While these details are important in some contexts, they often obscure the more fundamental aspects of memory management: what objects are garbage and why? We develop a series of calculi that are just low-level enough that we can express...
Topics: DTIC Archive, Morrisett, Greg, CARNEGIE-MELLON UNIV PITTSBURGH PA DEPT OF COMPUTER SCIENCE, *DATA...
This thesis describes the third phase of the development and testing for a flexible message processor designed for computer communications network applications. This message processor is microcomputer based and is called a Universal Network Interface Device (UNID). The thesis describes the upgrading of the two system monitors, the design of two memory boards, the development of a test plan for testing the device, and the results of the testing that was performed. The device employs two...
Topics: DTIC Archive, Baker,Lee R, AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING,...
Topics: DTIC Archive, LESER, TADEUSZ, ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD, *DIGITAL...
We develop an O(K(sq)n + nlogn) algorithm to obtain a preemptive schedule that minimizes L sub max when n jobs with given memory requirements are to be scheduled on m processors (n or = m) of given memory sizes. k is the number of distinct due dates. The value of the minimum L sub max can itself be found in O(kn + nlogn) time. (Author)
Topics: DTIC Archive, Lai, Ten Hwang, MINNESOTA UNIV MINNEAPOLIS DEPT OF COMPUTER SCIENCE, *SCHEDULING,...
DATA PROCESSINGMAGNETIC DRUMS, AVIONICSA method is described for developing a consistent framework for comparing the request handling capabilities of various drum memories. The method permits one to estimate the request capacity of a drum, given its physical characteristics together with a number of assumptions regarding such factors as data organization, blocking average quantity of data transferred per request, and effective latency time. The method developed is used to compare the capability...
Topics: DTIC Archive, Sutherland, Norman B, MITRE CORP BEDFORD MA, *MEMORY DEVICES, AIRBORNE, DATA...
Several different approaches have been used in the past to assess the vulnerability of microprocessors to SEU. In this report we discuss the advantages and disadvantages of each of these test methods, and address the question of how the microprocessor test results can be used to estimate upset rate in space. Finally, as an application of the above techniques, we present the test results and predicted upset rates in synchronous orbit for a selected group of microprocessors.
Topics: DTIC Archive, Koga,Rokutaro, AEROSPACE CORP EL SEGUNDO CA SPACE SCIENCES LAB, *MICROPROCESSORS,...
This research examined the grammar structure of descriptive English captions on multimedia data. The research was composed of three phases. The first phase was to investigate the grammar structure of example descriptive captions from a variety of subject domains. The second phase was to develop a set of domain independent binary grammar rules to be used in the Caption-Based Interface (CBI) which is a natural language interface for the Multimedia Database System. The third phase of the research...
Topics: DTIC Archive, Dulle, John D, NAVAL POSTGRADUATE SCHOOL MONTEREY CA, *DATA BASES, PROGRAMMING...
The evaluation of polynomials at equi-spaced arguments is a recurring task that arises in many applications. When a k-th order polynomial is written in nested form, its evaluation generally requires k additions and k multiplications at each argument of interest. For a set of equi-spaced arguments, it is demonstrated that the multiplications can be entirely circumvented (except during initialization) and that a recursive procedure employing only k additions per stage will suffice to generate the...
Topics: DTIC Archive, Nuttall,Albert H, NAVAL UNDERWATER SYSTEMS CENTER NEW LONDON CT NEW LONDON LAB,...
This research addressed extent to which the processing of items with well-learned names differs from that of items without well-learned names. To address this question, a new paradigm was created that does not require items to have names and does not require a naming response. In many short term visual memory paradigms, a bar marker designates a display location and the task is to name the item in that location. In the new paradigm the marker is replaced by a comparison item positioned above a...
Topics: DTIC Archive, Turock, David L, PENNSYLVANIA UNIV PHILADELPHIA, *MEMORY(PSYCHOLOGY), *VISUAL...
While general-purpose processor based systems are built to enforce memory protection to prevent the unintended sharing of data between processes, current systems built around reconfigurable hardware typically offer no such protection. Several reconfigurable cores are often integrated onto a single chip where they share external resources such as memory. While this enables small form factor and low cost designs, it opens up the opportunity for modules to intercept or even interfere with the...
Topics: DTIC Archive, NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF COMPUTER SCIENCE, *COMPUTER ACCESS...
The new concept of an unbalanced, hierarchically-divided cache memory system is introduced and analyzed. This approach generalizes existing cache structures by allowing different memory references (e.g. as possibly unevenly divided within an address-space) to be subject to various levels of caching as well as varied amounts of cache at each level. Under the assumption that the total cache size at a particular level is fixed, it is easily shown that at least one divided cache structure exists...
Topics: DTIC Archive, ARMY CECOM RESEARCH DEVELOPMENT AND ENGINEERING CENTER FORT MONMOUTH NJ, *CENTRAL...
Evaporated tungsten interface dopant, oxide-nitride interface and nitride bulk traps in MNOS structures were examined using charge centroid and thermally stimulated current (TSC) techniques. Trapping in dopant traps occurred at low injected charge levels. Above a 'saturation' level trapping occurred in the nitride, and the charge centroid penetrated into the nitride. TSC measurements were made on MNS, MNOS, and interface doped MNOS devices. Analysis of TSC spectra yielded trap depths for the...
Topics: DTIC Archive, Sutton, William Gardner, AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF...
The Image Retrieval and Processing System (IRPS) is a software package developed at Washington University and used by the NASA Regional Planetary Image Facilities (RPIF's). The IRPS combines data base management and image processing components to allow the user to examine catalogs of image data, locate the data of interest, and perform radiometric and geometric calibration of the data in preparation for analysis. Version 1.0 of IRPS was completed in Aug. 1989 and was installed at several...
Topics: NASA Technical Reports Server (NTRS), ASTRONOMICAL CATALOGS, COMPUTER PROGRAMS, DATA BASE...
Kolence's theory of the performance of computing systems is restated. In this development, the basic subsystems are reduced to two: logical subconfigurations and software units. These and the three fundamental variables, work, time and storage occupancy are all defined using as a basis a single logical construct, the set of instantaneous descriptions of instruction executions. Basic results are given for time relationships (utilizations and concurrency levels), work relationships (distribution...
Topics: DTIC Archive, Kovach,R P, INSTITUTE FOR SOFTWARE ENGINEERING PALO ALTO CA, *MATHEMATICAL MODELS,...
