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An Ada-Based Framework For An Idef0 Case Tool Using The X Window System, Jay-Evan J. Tevis Ii Dec 1990

An Ada-Based Framework For An Idef0 Case Tool Using The X Window System, Jay-Evan J. Tevis Ii

Theses and Dissertations

This thesis documents the design strategy, implementation methodology, testing, and evaluation used in developing an Ada-based framework for SAtool II using the X Window System. SAtool II is an IDEF0 graphical project editor and data dictionary editor. An Ada-Based Framework for an IDEF0 Case Tool Using the X Window System is the ICAM Definition Method Zero graphical notation language adopted by the U.S. Air Force to produce a function model of a manufacturing system or environment (23:1-1). The Air Force Institute of Technology is conducting on-going research in the use of IDEF0 in the requirements analysis phase …

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A Remote Visual Interface Tool For Simulation Control And Display, William J. Derouchey Dec 1990

A Remote Visual Interface Tool For Simulation Control And Display, William J. Derouchey

Theses and Dissertations

This thesis discusses the design and development of the Visual Interactive Simulation Interface Tool (VISIT). VISIT was designed to provide the graphical representation and user interface for a simulation that is running on another processor utilizing internet communications. The system provides support for various input devices to control the simulation display and environment. Simulation objects are displayed using either a three-dimensional wireframe representation or a Gouraud shaded representation. Viewer interaction to the simulation is provided by a collection of commands that allow the viewer to initialize, start, stop, abort, and restart the simulations. The viewer also has the ability to …

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An Evaluation Of An Ada Implementation Of The Rete Algorithm For Embedded Flight Processors, F. Jesse Fanning Dec 1990

An Evaluation Of An Ada Implementation Of The Rete Algorithm For Embedded Flight Processors, F. Jesse Fanning

Theses and Dissertations

The purpose of this thesis was to design and develop an expert system shell in Ada, and to evaluate the shell's execution and size performance to determine its suitability for real-time operation on the MIL-STD-1750A embedded flight processor. The expert system shell uses the CLIPS/Ada inference engine, a forward-chaining Ada implementation of Rete. The expert system shell design is presented along with an overview of the target environment--the MIL-STD-1750A VHSIC Avionic Modular Processor (VAMP) running under the Ada Avionics Real-Time Software (AARTS) Operating System. Theoretical and empirical complexity analyses of the inference engine are presented and discussed in view of …

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Optical Image Segmentation Using Wavelet Filtering Techniques, Christopher P. Veronin Dec 1990

Optical Image Segmentation Using Wavelet Filtering Techniques, Christopher P. Veronin

Theses and Dissertations

This research effort successfully implemented an automatic, optically based image segmentation scheme for locating potential targets in a cluttered FLIR image. Such a design is critical to achieve real-time segmentation and classification for machine vision applications. The segmentation scheme used in this research was based on texture discrimination and employs orientation specific, bandpass spatial filters as its main component. The orientation specific, bandpass spatial filters designed during this research include symmetrically located circular apertures implemented on heavy, black aluminum foil; cosine and sine Gabor filters implemented with detour-phase computer generated holography photoreduced onto glass slides; and symmetrically located circular apertures …

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Using Error Detection And Correction Coding For A Turbulent Atmospheric Optical Communications Link, Mark A. Cloutier Dec 1990

Using Error Detection And Correction Coding For A Turbulent Atmospheric Optical Communications Link, Mark A. Cloutier

Theses and Dissertations

Probability of bit error (Pb) performance for a turbulent, atmospheric, optical, communications link with convolutional error detection and correction coding was investigated. The codes investigated were all rate 1/2 codes with constraint lengths ranging from 3 to 7. It was assumed that the coded data stream was sufficiently interleaved so that the turbulent channel could be considered memoryless. A theoretical bound on Pb, given by Viterbi for a memoryless channel, was used to plot curves of Pb versus the signal intensity of last transmitter. These curves were plotted for three different levels of atmospheric turbulence and three …

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A Comparison Of Human-Computer Interfaces In Air Force Organizations, Michael G. Morris Dec 1990

A Comparison Of Human-Computer Interfaces In Air Force Organizations, Michael G. Morris

Theses and Dissertations

This thesis investigated differences in organizational efficiency and effectiveness for users of graphical user interfaces and text-based interfaces on personal computers in Air Forces offices. Areas of interest included amount of time required to learn the basic system, amount of time required to learn new application, users' ratings of user-friendliness, users' perceptions of the extent that their system help them perform in their job, the number of software packages used on the job by users of each system, user satisfaction, responsible authorities' ratings of quality of output, and the relationship between user job experience level and interface used on the …

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A Performance Predication Model For Parallel Compilers, Ko-Yang Wang Nov 1990

A Performance Predication Model For Parallel Compilers, Ko-Yang Wang

Department of Computer Science Technical Reports

No abstract provided.

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An Interactive Symbolic-Numeric Interface To Parallel Ellpack For Building General Pde Solvers, S. Weerawarana, Elias N. Houstis, John R. Rice Nov 1990

An Interactive Symbolic-Numeric Interface To Parallel Ellpack For Building General Pde Solvers, S. Weerawarana, Elias N. Houstis, John R. Rice

Department of Computer Science Technical Reports

No abstract provided.

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Implementation And Performance Of A Communication Facility For Distributed Transaction Processing, Enrique Mafla, Bharat Bhargava Nov 1990

Implementation And Performance Of A Communication Facility For Distributed Transaction Processing, Enrique Mafla, Bharat Bhargava

Department of Computer Science Technical Reports

No abstract provided.

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Experiences With Parallelizing A Distributed Database System, Bharat Bhargava, Janche Sang, Yin-He Jiant Nov 1990

Experiences With Parallelizing A Distributed Database System, Bharat Bhargava, Janche Sang, Yin-He Jiant

Department of Computer Science Technical Reports

No abstract provided.

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Managing Data Synchronization Automatically For Distributed-Memory Architectures, Ko-Yang Wang Nov 1990

Managing Data Synchronization Automatically For Distributed-Memory Architectures, Ko-Yang Wang

Department of Computer Science Technical Reports

No abstract provided.

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A Perspective On The Cypress Internetworking Technology, Thomas Narten, Douglas E. Comer, Rajendra Yavatkar Nov 1990

A Perspective On The Cypress Internetworking Technology, Thomas Narten, Douglas E. Comer, Rajendra Yavatkar

Department of Computer Science Technical Reports

No abstract provided.

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Compiling Programs For Nonshared Memory Machines, Charles Koelbel Nov 1990

Compiling Programs For Nonshared Memory Machines, Charles Koelbel

Department of Computer Science Technical Reports

No abstract provided.

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Segment Streaming For Efficient Pipelined Televisualization, Fengmin Gong Nov 1990

Segment Streaming For Efficient Pipelined Televisualization, Fengmin Gong

All Computer Science and Engineering Research

The importance of scientific visualization for both science and engineering endeavors has been well recognized. Televisualization becomes necessary because of the physical distribution of data, computation resources, and users involved in the visualization process. However, televisualization poses a number of challenges to the designers of communication protocols. A pipelined televisualization (PTV) model is proposed for efficient implementation of a class of visualization applications. Central to the proposed research is the development of a segment of streaming IPC (interprocess communication) mechanism in support of efficient pipelining across very high speed internetworks. This requires exploration of special issues arising from extending a …

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Hypercube Algorithms For Operations On Quadtrees, Ravi V. Shankar, Sanjay Ranka Nov 1990

Hypercube Algorithms For Operations On Quadtrees, Ravi V. Shankar, Sanjay Ranka

Electrical Engineering and Computer Science - Technical Reports

This paper describes parallel algorithms for the following operations on quadtrees - boolean operations (union, intersection, complement), collapsing a quadtree, and neighbor finding in an image represented by a quadtree. The architecture assumed in this paper is a hypercube with one processing element (PE) per hypercube node. We assume that the architecture is SIMD, i.e., all PEs work under the control of a single control unit.

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Management Of Interdependent Data: Specifying Dependency And Consistency Requirements, Amit P. Sheth, Marek Rusinkiewicz Nov 1990

Management Of Interdependent Data: Specifying Dependency And Consistency Requirements, Amit P. Sheth, Marek Rusinkiewicz

Kno.e.sis Publications

Multiple databases that serve the needs of various application systems are considered. One of the significant problems in managing these databases is to maintain the related data items consistent to the required degree. This problem is frequently referred to as `redundant data management'. Since the term `redundancy' tends to imply that the data is unwanted or superfluous, the authors use the more general term `management of interdependent data'. Some preliminary ideas in this area are discussed. The problem of managing interdependent data is characterized, and some important types of interdatabase dependency are identified.

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Wright State University College Of Engineering And Computer Science Bits And Pcs Newsletter, November 1990, College Of Engineering And Computer Science, Wright State University Nov 1990

Wright State University College Of Engineering And Computer Science Bits And Pcs Newsletter, November 1990, College Of Engineering And Computer Science, Wright State University

BITs and PCs Newsletter

A ten page newsletter created by the Wright State University College of Engineering and Computer Science that addresses the current affairs of the college.

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A Graphical Knowledge Level Approach For User-Database Interaction, K. Tan, H. Chan, Keng Siau Nov 1990

A Graphical Knowledge Level Approach For User-Database Interaction, K. Tan, H. Chan, Keng Siau

Research Collection School Of Computing and Information Systems

The authors propose a novel user interface, the Graphical Knowledge Level interface, for user-database interaction. This interface addresses two of the current research problems: the semantic inadequacy of the relational model and the logical data dependence of the relational languages. The interface is more user-friendly than the SOL interface and the Universal Relation interface, as it employs the graphical approach. The semantic inadequacy problem is alleviated by using an enhanced entity-relationship model. This data model includes abstraction concepts such as aggregation, generalization, and categorization. A formal, high-level Graphical Knowledge Level Query Language, GKQL, which provides for both logical and physical …

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Fiber Distributed Data Interface, Piyush Kulshreshiha Oct 1990

Fiber Distributed Data Interface, Piyush Kulshreshiha

Department of Computer Science Technical Reports

No abstract provided.

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Cooperative Management Of Embedded Resources In A Distributed Environment, Douglas E. Comer, James Griffioen Oct 1990

Cooperative Management Of Embedded Resources In A Distributed Environment, Douglas E. Comer, James Griffioen

Department of Computer Science Technical Reports

No abstract provided.

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Parallel Heuristics For Determining Steiner Trees In Images, Susanne E. Hambrusch, Lynn Tewinkel Oct 1990

Parallel Heuristics For Determining Steiner Trees In Images, Susanne E. Hambrusch, Lynn Tewinkel

Department of Computer Science Technical Reports

No abstract provided.

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The Effects Of Communication Latency Upon Synchronization And Dynamic Load Balance On A Hypercube, Dan C. Marinescu, John R. Rice Oct 1990

The Effects Of Communication Latency Upon Synchronization And Dynamic Load Balance On A Hypercube, Dan C. Marinescu, John R. Rice

Department of Computer Science Technical Reports

No abstract provided.

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A Parallel Logic Language For Transaction Specification In Multidatabase Systems, Eva Kuhn, Ahmed K. Elmagarmid, Yungho Leu, Nourreddine Boudriga Oct 1990

A Parallel Logic Language For Transaction Specification In Multidatabase Systems, Eva Kuhn, Ahmed K. Elmagarmid, Yungho Leu, Nourreddine Boudriga

Department of Computer Science Technical Reports

No abstract provided.

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Eclipse: A System For High Performance Concurrent Simulation, V. S. Sunderam, Vernon J. Rego Oct 1990

Eclipse: A System For High Performance Concurrent Simulation, V. S. Sunderam, Vernon J. Rego

Department of Computer Science Technical Reports

No abstract provided.

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An Overview Of The Virtual Memory Xinu Project, Douglas E. Comer, James Griffioen Oct 1990

An Overview Of The Virtual Memory Xinu Project, Douglas E. Comer, James Griffioen

Department of Computer Science Technical Reports

No abstract provided.

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Software Performance Evaluation Papers In Toms, Volumes 1-15, John R. Rice Oct 1990

Software Performance Evaluation Papers In Toms, Volumes 1-15, John R. Rice

Department of Computer Science Technical Reports

No abstract provided.

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Optimal Parallel Solutions To The Neighbor Localization Problem And Integer Sorting: A Fine Grained Approach, Ramachandran Vaidyanathan, Carlos R.P. Hartmann, Pramod K. Varshney Oct 1990

Optimal Parallel Solutions To The Neighbor Localization Problem And Integer Sorting: A Fine Grained Approach, Ramachandran Vaidyanathan, Carlos R.P. Hartmann, Pramod K. Varshney

Electrical Engineering and Computer Science - Technical Reports

In this report, a fine-grained decomposition approach is used to obtain an optimal parallel solution to the Neighbor Localization Problem, which in turn is œ used to sort n θ(log n)-bit numbers optimally on an EREW model. The model of computation used is the EREW Reconfigurable PRAM (R-PRAM) that permits the use of “very small” processors. The main result of this report is a parallel EREW R-PRAM algorithm that sorts n θ(log n)-bit numbers in θ(log n) time with θ(n log n) “work”. The proposed algorithm is asymptotically optimal in time and efficiency. If a weaker variant of the R-PRAM …

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A Software Design Tool For Predictable Performance In Real-Time, Data Flow Architectures, Brij Mohan V. Mandala Oct 1990

A Software Design Tool For Predictable Performance In Real-Time, Data Flow Architectures, Brij Mohan V. Mandala

Electrical & Computer Engineering Theses & Dissertations

A software design tool which aids in the performance evaluation and selection of operating points for an algorithm implemented in ATAMM defined data flow architectures is presented in this thesis. ATAMM (Algorithm To Architecture Mapping Model) is a new graph theoretic model developed by researchers at Old Dominion University and the NASA-Langley Research Center. ATAMM is capable of modeling the execution of large-grained algorithms on distributed data flow architectures. A software tool is required for predicting the performance, determining the resource requirements and for selecting suitable operating points for an ATAMM based system. The ATAMM Design Tool presented in this …

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A Framework For Intelligent Parallel Compilers, Ko-Yang Wang Sep 1990

A Framework For Intelligent Parallel Compilers, Ko-Yang Wang

Department of Computer Science Technical Reports

No abstract provided.

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Domain Decomposer: A Software Tool For Mapping Pde Computations To Parallel Architectures, N. P. Chrisochoides, C. E. Houstis, Elias N. Houstis, P. N. Papachiou, S. K. Kortesis Sep 1990

Domain Decomposer: A Software Tool For Mapping Pde Computations To Parallel Architectures, N. P. Chrisochoides, C. E. Houstis, Elias N. Houstis, P. N. Papachiou, S. K. Kortesis

Department of Computer Science Technical Reports

No abstract provided.

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