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Aug 2, 2010
08/10
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Mineck, Raymond Edwar
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A comprehensive set of experimental and analytical investigations have been conducted to assess the potential aerodynamic benefits from spanwise blowing at the tip of a moderate aspect ratio, swept wing. An analytical model has been developed to simulate a jet exhausting from the wing tip. An experimental study of a subsonic jet exhausting from the wing tip was conducted to investigate the effect of spanwise blowing from the tip on the aerodynamic characteristics of a moderate aspect ratio,...
Topics: BUFFER STORAGE, FAST FOURIER TRANSFORMATIONS, MEMORY (COMPUTERS), SIGNAL PROCESSING, ALGORITHMS,...
Topics: DTIC Archive, Wise, R C, SYSTEM DEVELOPMENT CORP SANTA MONICA CA, *COMPUTER PROGRAMMING, *INPUT...
Reports that the function of SRDTRK (Read Bird Buffer 1604 Transfer Tape) is to read specific information from the 160A-1604 transfer tape. Also reports that this specific information is Tracking messages, or Vehicle time messages, and is related to a particular station, vehicle and revolution.
Topics: DTIC Archive, Wise, R C, SYSTEM DEVELOPMENT CORP SANTA MONICA CA, *COMPUTER PROGRAMMING, *BUFFER...
The Indian Ocean Station (IOS) Buffer System is a CDC 160C computer system which provides a vehicle-oriented link between a remote tracking station, a 1604 computer and the Data Analy sis/Technical Advisor, Data Presentation, and Multi-Ops complexes. The program system will process prepass and telemetry data for one vehicle and site each time it is operated. The IOSB is a modification of the existing Bird Buffer System. Although the system is primarily intended to support IOS, it can support...
Topics: DTIC Archive, Wise, R C, SYSTEM DEVELOPMENT CORP SANTA MONICA CA, *SPACE SURVEILLANCE,...
This report describes a research investigation directed toward more efficient utilization of channel capacity for speech communication. This objective was pursued by a program (1) to theoretically analyze the benefits realized by 'predictive encoding' of vocoded speech sources, (2) to propose and analytically design a model of a typical processing system utilizing predictive coding, and (3) to evaluate the performance characteristics of such a system by simulation with vocoded speech samples on...
Topics: DTIC Archive, Aitken, A R, TEXAS INSTRUMENTS INC DALLAS, *SPEECH, *VOICE COMMUNICATIONS, REAL TIME,...
The paper gives an overview of commonly used synchronization primitives and literature, and presents a new form of primitive expressing conditional critical regions. A new solution is presented to the problem of readers and writers, utilizing the proposed synchronization primitive. The solution is simpler and shorter than other known algorithms. The first sections of the paper give a tutorial introduction into established methods, in order to provide a suitable background for the remaining...
Topics: DTIC Archive, Pettersen, Odd, STANFORD UNIV CA DEPT OF COMPUTER SCIENCE, *ARTIFICIAL INTELLIGENCE,...
The ARPA Computer Network is a packet-switching store-and-forward communications system designed for use by computers and computer terminals. This Quarterly Technical Report briefly describes various aspects of network operation and maintenance, including IMP software modifications to permit more than 63 IMPs on the net and more than 4 Host computers on an IMP, and shipment of the first Private Line Interface to the field; and discusses in some detail the new TIP software to be released...
Topics: DTIC Archive, Heart, Frank, BOLT BERANEK AND NEWMAN INC CAMBRIDGE MA, *MESSAGE PROCESSING,...
An adaptive transform coding algorithm based on a recursive procedure in the transform domain has been developed. Both the quantization parameters and bit assignment are dynamically determined and thus are closely matched to the actual image structure. Overhead requirements are minimal.
Topics: DTIC Archive, Tescher, Andrew G, AEROSPACE CORP EL SEGUNDO CA ENGINEERING SCIENCE OPERATIONS,...
In this paper a processor utilization model for a simplified multi-processor computer system is developed using a G/M/s/N queueing system model. The mathematical model is based on the busy period analysis, and two utilization measures are derived: (1) Processor utilization (the fraction of processor occupation time during a busy cycle), and (2) System utilization (the fraction of actual utilization time for all processors). Experimentation with the computational model reveals the sensitivity of...
Topics: DTIC Archive, Bhat,U Narayan, Nance,Richard E, SOUTHERN METHODIST UNIV DALLAS TEX DEPT OF...
The result of this investigation is a design for an interface system which can be used to interface a Digital Electronic Corporation PDP-11/05 minicomputer with electron beam control electronics (EBCE). The EBCE is part of a deformable thermoplastic phase plate brassboard used for optical phase modulation in the Air Force Avionics Laboratory (AFAL/DHO). The interface is a modular design made up of a unibus interface, buffer, input control, output control, master control, and a digital to analog...
Topics: DTIC Archive, Crowder,James R, AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF...
This research deals with the specification, analysis and evaluation of some routing and topology design procedures for large store and forward packet switched computer communication networks. The procedures studied are an extension of present techniques and rely on a hierarchical clustering of the network nodes. Hierarchical adaptive routing schemes are investigated in the context of large networks. A hierarchical design methodology is also presented as a solution for the reduction of the...
Topics: DTIC Archive, Kleinrock,Leonard, CALIFORNIA UNIV LOS ANGELES DEPT OF COMPUTER SCIENCE, *COMPUTER...
Detailed input/output (I/O) specifications were compiled for the three interface channels that currently exist in the STARAN associative processing computer at RADC: (1) buffered I/O (BIO), (2) direct memory access (DMA), and (3) external function (EXF). The availability and location of port connections for these channels are included within the I/O specifications. A comprehensive philosophy was developed that provides an interface between various external devices and the parallel input/output...
Topics: DTIC Archive, Kroeger,Michael J, GOODYEAR AEROSPACE CORP AKRON OHIO, *INPUT OUTPUT PROCESSING,...
The database computer (DBC) is a specialized back-end computer which is capable of managing data of 10 to the 9th power -10 to the 10th power bytes in size and supporting known data models such as relational, network, hierarchical and attribute-based models. In addition to its intended purpose of handling large databases and interfacing with various data models, the DBC is one of the first database machines which have built-in protection mechanisms for access control and clustering mechanisms...
Topics: DTIC Archive, Hsiao,David K, Kannan,Krishnamurthi, OHIO STATE UNIV COLUMBUS COMPUTER AND...
A Package of subroutines is offered for use on the ICL 1904S computer, to output characters on paper tape which can then be used to drive a CIL Plotter via a tape reader. Their use in FORTRAN and ALGOL is demonstrated. A means is available of using the same tapes on plotters attached to PDP computers. The routines are implemented on an ICL 1904S computer based in the Computing division, A.U.W.E., Portland. (Author)
Topics: DTIC Archive, Butterworth,W J, ADMIRALTY UNDERWATER WEAPONS ESTABLISHMENT PORTLAND (ENGLAND),...
Three Input Buffer designs which provide intermediate storage between the Analog to Digital Converters and the Digital Matched Filter of a Radar Signal Processor are presented. All desings use a basic all-ECL buffer module. Prototype hardware experiments indicate that with 8:1 input data multiplexing, ECL 10K technology will yield input rates up to 142 Ms/s per channel, and output rates of 45 Ms/s per convolver rail. (Author)
Topics: DTIC Archive, Huntoon,Albert H, MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB, *SIGNAL...
This document details the Command Center Information System (DDIS), a new architectural concept for Navy Information Storage and retrieval (ISAR). The system consists of a query (user) processor, connected to a data processor by a 1200-baud communication line, a buffer memory, an interface processor, and bulk storage.
Topics: DTIC Archive, Small,D L, Christy,D O, NAVAL ELECTRONICS LAB CENTER SAN DIEGO CALIF, *INFORMATION...
The purpose of this project is to provide seismic data storage and retrieval services.
Topics: DTIC Archive, COMPUTER CORP OF AMERICA CAMBRIDGE MA, *DATA STORAGE SYSTEMS, *INFORMATION RETRIEVAL,...
Topics: DTIC Archive, COMPUTER CORP OF AMERICA CAMBRIDGE MA, *DATA STORAGE SYSTEMS, *INFORMATION RETRIEVAL,...
A detailed description of the programmable signal processor developed for use in the US Army Missile Command experimental array radar is presented in this report. The programmable signal processor has quadrature channel, moving target indicators followed by post detection integration. The moving target indicators can be programmed to have any desired frequency response and can be adapted as a function of antenna beam position, range bin sector, or time. The processor also contains a high speed...
Topics: DTIC Archive, Owen,L B, ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA...
A pipeline as defined here is a collection of segments of hardware which can operate simultaneously. A task flows synchronously from segment to segment for its execution. Each task follows one of several distinct task flow patterns which are assumed to be fixed and known in advance. It is characteristic of pipelines that a task can be initiated in the pipeline before an earlier initiated task has completed its execution. A problem arises when two or more tasks try to use the same segment at the...
Topics: DTIC Archive, Patel,Janek H, ILLINOIS UNIV AT URBANA-CHAMPAIGN COORDINATED SCIENCE LAB, *PARALLEL...
This report describes the hardware and software related concepts of SAWIS-280. A simplified description of the Surface and Air Weapons Control System is presented in the Introduction showing a need for a computer based performance monitoring/analysis system. Technical details of the relevant portions of the WM-22/6 Fire Control System are described as a base point for the design of two system interfaces. Also described in detail are the following: Fire Control Computer Interface, Auxiliary...
Topics: DTIC Archive, Mickeal,J F, DEFENCE RESEARCH ESTABLISHMENT SUFFIELD RALSTON (ALBERTA), *FIRE CONTROL...
This report shows the capability of the database computer (DBC) for supporting hierarchical data models and systems. Since IBM's Information Management System (IMS) is the most widely used data management system which supports a hierarchical view of data, we intend to show that the DBC can support IMS databases and IMS application programs. Furthermore, this study provides us with a case for comparing the merits of using a conventional general-purpose computer versus a special-purpose database...
Topics: DTIC Archive, Hsiao,David K, OHIO STATE UNIV COLUMBUS COMPUTER AND INFORMATION SCIENCE RESEARCH...
Topics: DTIC Archive, Lipinski,Jerzy, FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO, *MINICOMPUTERS,...
A tape recording system was assembled to record scientific data on board a research vessel. Digital data equivalent to a single serial bit stream with a clock rate of 10.6 mHz were multiplexed onto six serial pulse-code-modulation channels of a Bell and Howell VR-3700B high-density digital tape recording system. The Bell and Howell enhanced-non-return-to-zero (ENRZ) code was used with a tape speed of 120 inches per second and a packing density of 16,500 bits per inch. Auxiliary data including...
Topics: DTIC Archive, Black,M R, DEFENCE RESEARCH ESTABLISHMENT PACIFIC VICTORIA (BRITISH COLUMBIA),...
Repeaters in the radio network need to be initialized by the station; namely, to receive a so-called label which enables addressing specific devices during packet transportation. It is assumed that a priori the station is not informed of the existance and location of specific repeaters. Hence, the initialization process involves sending special control packets, called Repeater On Packets (ROP's) from repeaters to the station to inform existance and location, the transmission of labels by the...
Topics: DTIC Archive, Frank, Howard, NETWORK ANALYSIS CORP GREAT NECK NY, *COMMUNICATION SWITCHING CENTERS,...
The goals established at the onset of this program were fivefold: (1) design and fabricate a spherical electron, (2) design and fabricate a planar ion sensor, (3) design and fabricate a multioutput low voltage power converter, (4) design and fabricate digital interface electronics incorporating a nine bit successive approximation analog to digital converter, and (5) design and build suitable ground support equipment for the thorough testing and characterization of the DMSP SS/IE plasma...
Topics: DTIC Archive, Zukauskis,John W, SPACETAC INC BEDFORD MASS, *SPACE FLIGHT, *ANALOG TO DIGITAL...
A direct, real time, video to digital data recording system has been developed to record 10 micrometers thermal imagery in conjunction with an AGA 680 LW camera. This device is now being used to study the thermal characteristics of various types of natural terrain for the purpose of developing tactical target acquisition techniques. This data recording system consists of an analog to digital interface, NOVA 2/10 minicomputer, and magnetic tape transport and is designed to record 16 frames per...
Topics: DTIC Archive, Cordova, Ronald J, MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB, *DIGITAL...
A television camera input and display output buffer system has been designed and partially constructed as of January 1977. The system consists of a controller for selecting either of two camera inputs, a storage memory, a system controller, and a run-length encoder. The memory is easily expandable and currently consists of 4096 8-bit words. The system controller selects a rectangular section from any portion of a 512 x 512 digitized image. The section may be of any size from 512 x 8 to 1 x 1 to...
Topics: DTIC Archive, England,J N, NORTH CAROLINA STATE UNIV RALEIGH SIGNAL PROCESSING LAB, *IMAGE...
The telegram problem was initially proposed as a programming exercise suitable for beginning students. A number of solutions have been published, all containing errors. In this paper the trouble is traced to the original specification and offer a new version. The most significant difference is the use of a grammatical notation for some parts of the specification. The new specification is then followed to a new solution. The concusion is that the new specification is of higher quality, but not...
Topics: DTIC Archive, McKeeman,W M, CALIFORNIA UNIV SANTA CRUZ, *COMPUTER PROGRAMS, *COMPUTER PROGRAMMING,...
The object of this research is to develop a flexible semiconductor memory organization for parallel-pipelined processors and investigate the effect of memory interference on the system performance for a variety of module characteristics, processor orders and memory configurations.
Topics: DTIC Archive, Briggs,Faye Alaye, ILLINOIS UNIV AT URBANA-CHAMPAIGN COORDINATED SCIENCE LAB, *MEMORY...
The UNIX operating system for the PDP-11 series of minicomputers has gained wide popularity in academic and government circles. This report considers interprocess communication (IPC) facilities with the goal of developing an improved IPC capability for UNIX. An outline of the major issues involved in providing IPC is developed based on a survey of the literature, and UNIX IPC facilities are described in terms of this outline. By considering new applications being developed under UNIX, several...
Topics: DTIC Archive, Sunshine,Carl A, RAND CORP SANTA MONICA CALIF, *DATA TRANSMISSION SYSTEMS,...
The UNIX operating system for the PDP-11 series of minicomputers has gained wide popularity in academic and government circles. This report considers interprocess communication (IPC) facilities with the goal of developing an improved IPC capability for UNIX. A companion report outlines the major issues involved in providing IPC, describes the standard UNIX IPC facilities, and points out several of their weaknesses. The present report describes the 'port' mechanism developed at Rand to overcome...
Topics: DTIC Archive, Zucker,Steven, RAND CORP SANTA MONICA CALIF, *DATA TRANSMISSION SYSTEMS,...
Pipelining, parallel processing and memory organization techniques to improve the capability of computer systems are investigated. In pipelining, results obtained pertain to the modelling, sequencing control, design methods and resource allocation problems of generalized pipeline systems. In parallel processing, language constructs which would constraint the programmer to write parallel programs more amenable to analysis and efficient execution are proposed and a scheme to detect and control...
Topics: DTIC Archive, Ramamoorthy,C V, CALIFORNIA UNIV BERKELEY ELECTRONICS RESEARCH LAB, *COMPUTER...
A high-speed, special-purpose preprocessor has been designed for the GEODSS (Ground-based Electro-Optical Deep Space Surveillance) system during the experimental test and evaluation phase of this program. The preprocessor is part of snapshot MTI technique presently being tested and evaluated at the GEODSS experimental Test Site (ETS). The preprocessor provides the interface between a low light level TV sensor and the MITRE multi-minicomputer processor. The primary functions performed by the...
Topics: DTIC Archive, Bungard, D. R., MITRE CORP BEDFORD MA, *SPACE SURVEILLANCE, *PREPROCESSING, *MOVING...
This program is an attempt at a large scale, multi-level general circulation model of the atmosphere. The original conception was to implement a very flexible program. The major programs are: INITE (Since a typical problem will require more storage than can be accomodated, this program parcels the data and codes information as to how it is partitioned.); GEX (A solution program to step the fields ahead in time.); and DISPLY (This program displays the various fields which have been saved from...
Topics: DTIC Archive, Leonard,Thomas J, REGIS COLL WESTON MASS, *COMPUTER PROGRAMS, *ATMOSPHERIC MOTION,...
A programmable symbol generator, in-raster buffer refresh memory and software development station was designed, fabricated and tested. The system was developed to meet the Navy's needs for improved reliability vertical situation displays for advanced weapon systems. This report documents the last phase of a four phase study and development program sponsored by NADC. Also included in this report is a discussion of color requirements and a survey of color display technology. (Author)
Topics: DTIC Archive, Wolfson,G, HUGHES AIRCRAFT CO CULVER CITY CALIF DISPLAY SYSTEMS LAB, *DISPLAY...
The Multimode Information Distribution System (MIDS) is an advanced, local area communication system capable of simultaneously handling audio, video, and digital data traffic for a large number of subscribers. The MIDS configuration utilizes a broadband coaxial cable transmission medium such as that used by the CATV industry. The prototype MIDS serves to demonstrate proof of concepts for flag-for-service signaling and supervision as well as an adaptive data rate transmission scheme.
Topics: DTIC Archive, Delaney, G. T., MITRE CORP BEDFORD MA, *INFORMATION EXCHANGE, *COMMUNICATIONS...
The primary objective of this effort was to: expand the existing STARAN cartographic raster processing capability from 4-mil in/out processing to 4-mil input with 4-mil output, 2-mil input with 2-mil output, and 1-mil input with 1-mil output; expand the I/O capabilities to include processing of ETL run-length-coded data and DMA run-length-coded data; and perform some initial investigation of contour tagging techniques. These modifications were based on the processing of map overlays up to 19 x...
Topics: DTIC Archive, Adams,N J, GOODYEAR AEROSPACE CORP AKRON OHIO, *ELECTRONIC SCANNERS, *MAPPING,...
An emulation of the IBM System/360 architecture is presented - the EMMY/360. Problem state code which executes correctly on an IBM 360 will also execute correctly on the EMMY/360. Code producing execution exceptions will, in most cases, produce the same results on the two systems. Certain exceptions occurring on the IBM 360 cannot occur on the EMMY/360, such as address specification exceptions for main store operands, and certain precise interrupts on IBM 360 will be imprecise on the EMMY/360,...
Topics: DTIC Archive, Wallach,Walter A, STANFORD UNIV CALIF STANFORD ELECTRONICS LABS, *COMPUTER...
Asynchronous time division multiplexers (ATDM's) typically produce large phase excursions as a result of bit stuffing operations. Analog phase locked loops (PLL) are normally employed to smooth these excursions to levels which can be accepted by various sink equipments. For ATDM's which cover a broad range of rates, such as the AN/GSC-24, it is difficult to provide a high level of smoothing across the entire range due to noise and frequency limitations. This project investigated a digital PLL...
Topics: DTIC Archive, Wortley,David L, ROME AIR DEVELOPMENT CENTER GRIFFISS AFB N Y, *TIME DIVISION...
An algorithm is given to find a prefix condition code that minimizes the value of the moment generating function of its codeword length distribution for a given positive argument. This algorithm is used in an iterative way to yield a code that maximizes the rate of decay of the probability of buffer length increases. (Author)
Topics: DTIC Archive, Humblet,Pierre A, MASSACHUSETTS INST OF TECH CAMBRIDGE ELECTRONIC SYSTEMS LAB, *DATA...
The mathematical study of buffering and flow control is based on a gradual input queueing model. The gradual input model has been used previously to study data multiplexors. Here it is extended to an entire message switched communication network. A probability of buffer overflow analysis is developed and used to determine buffer requirements. A delay analysis is also developed. The results obtained using the gradual input queue are compared to the commonly used M/M/1 queue model for message...
Topics: DTIC Archive, Wunderlich, Eberhard F, MASSACHUSETTS INST OF TECH CAMBRIDGE ELECTRONIC SYSTEMS LAB,...
Communication concentrators perform the basic network function of merging many input flows into a single output flow. This requires formating the data and encoding side information about when messages start, what their lengths are and what their origins and destinations are. This thesis examines efficient ways of performing these functions, the objective being to minimize the average message delay, or some other queueing theoretic quantity, like the probability of buffer overflow. The work is...
Topics: DTIC Archive, Humblet, Pierre A, MASSACHUSETTS INST OF TECH CAMBRIDGE ELECTRONIC SYSTEMS LAB,...
A virtual addressing technique for expanding the address space of the EMMY/360 to 2 million bytes is presented. The scheme uses a translation table of 512 words of EMMY control store, addressed using bits 20:12 of the logical (virtual) program address. The page table entry reflects status of the referenced page i.e. available, or written to. The semantic pointer for each instruction controls whether a logical address is to be translated, or the execution routine is to use the logical address....
Topics: DTIC Archive, Wallach,Walter A, STANFORD UNIV CALIF DIGITAL SYSTEMS LAB, *COMPUTER PROGRAMMING,...
B-K Dynamics activities during the first quarter (28 October 1974 to 15 January 1975) have been focused on two major areas: STINGER simulation preparation and PDDAIOS installation. This report summarizes the work performed by BKD during the above period and outlines accomplishments and plans for the next quarter. No attempt has been made to document software generated during the period since all programs described are being continually upgraded. Current listings, flow charts and program decks...
Topics: DTIC Archive, B-K DYNAMICS INC ROCKVILLE MD, *COMPUTERIZED SIMULATION, *ANTIAIRCRAFT MISSILES,...
Synchronization code is necessary to control shared access of an abstract data object in a parallel-processing environment. This thesis explores an approach in which a synchronization property can be specified in a high-level nonprocedural language, and an implementation for the specified property can be synthesized algorithmically. A problem specification language is introduced in which synchronization properties can be expressed in a structured but natural manner. A method is then presented...
Topics: DTIC Archive, Laventhal,Mark Steven, MASSACHUSETTS INST OF TECH CAMBRIDGE LAB FOR COMPUTER SCIENCE,...
The Digital Avionics Information System (DAIS) Test Facility requires a means for exercising the serial output and input interface devices of the remote terminal. This report describes the design and operation of the unit needed to perform this function. (Author)
Topics: DTIC Archive, Caffrey,James C, AIR FORCE AVIONICS LAB WRIGHT-PATTERSON AFB OHIO, *INPUT OUTPUT...
A tool for developing microprocessor based pattern recognizers is presented. A two segment system of programs is implemented. One segment is a subsystem consisting of a generalized pattern classifier program and utility routines for an INTEL SBC 80/20 microprocessor system. The other segment is a subsystem of four interactive programs. These four programs support feature selection, pattern class definition and performance evaluation using procedures fitted to the classifier algorithm. This...
Topics: DTIC Archive, Leary,John R, AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING,...
This paper summarizes the first twenty years of concurrent programming and identifies the major development phases as an initial hardware challenge followed by a software crisis, a conceptual innovation, and language development which in turn led to formal understanding and hardware refinement. The paper draws a parallel between this development and the present challenge of distributed computing. (Author)
Topics: DTIC Archive, Hansen,Per Brinch, UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES DEPT OF COMPUTER...
An inventory of physical goods or storage space (in a communications system buffer, for instance) often experiences 'all or nothing' demand: if a demand of random size D can be immediately and entirely filled from stock it is satisfied, but otherwise it vanishes. Probabilistic properties of the resulting inventory level are discussed analytically, both for the single buffer and for multiple buffer problems. Numerical results are presented. (Author)
Topics: DTIC Archive, Gaver,D P, NAVAL POSTGRADUATE SCHOOL MONTEREY CA, *BUFFER STORAGE, STOCHASTIC...
