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Xinu On The Transputer, Douglas E. Comer, Victor Norman Sep 1990

Xinu On The Transputer, Douglas E. Comer, Victor Norman

Department of Computer Science Technical Reports

No abstract provided.


Another Unified Approach To Some Bottleneck And Capacity Optimization Problems, Wojciech Szpankowski Sep 1990

Another Unified Approach To Some Bottleneck And Capacity Optimization Problems, Wojciech Szpankowski

Department of Computer Science Technical Reports

No abstract provided.


Parallel Techniques For Computational Geometry, Mikhail J. Atallah Sep 1990

Parallel Techniques For Computational Geometry, Mikhail J. Atallah

Department of Computer Science Technical Reports

No abstract provided.


Global Concurrency Control In Heterogeneous Distributed Database Systems, Ahmed K. Elmagarmid, Weimin Du, Yungho Leu Sep 1990

Global Concurrency Control In Heterogeneous Distributed Database Systems, Ahmed K. Elmagarmid, Weimin Du, Yungho Leu

Department of Computer Science Technical Reports

No abstract provided.


On High Level Characterization Of Parallelism, Dan C. Marinescu, John R. Rice Aug 1990

On High Level Characterization Of Parallelism, Dan C. Marinescu, John R. Rice

Department of Computer Science Technical Reports

No abstract provided.


Multisearch Techniques Of Hierarchical Dags On Mesh-Connected Computers, With Applications, Jyh-Jong Tsay, Mikhail J. Atallah Aug 1990

Multisearch Techniques Of Hierarchical Dags On Mesh-Connected Computers, With Applications, Jyh-Jong Tsay, Mikhail J. Atallah

Department of Computer Science Technical Reports

No abstract provided.


Synchronization And Load Imbalance Effects In Distributed Memory Multiprocessor Systems, Dan C. Marinescu, John R. Rice Jul 1990

Synchronization And Load Imbalance Effects In Distributed Memory Multiprocessor Systems, Dan C. Marinescu, John R. Rice

Department of Computer Science Technical Reports

No abstract provided.


Application Of The E/T Performance Modeling Methodology To A Computation On A 128 Processor Ncube, Dan C. Marinescu, John R. Rice Jul 1990

Application Of The E/T Performance Modeling Methodology To A Computation On A 128 Processor Ncube, Dan C. Marinescu, John R. Rice

Department of Computer Science Technical Reports

No abstract provided.


The Cops Security Checker System, Daniel Farmer, Eugene H. Spafford Jul 1990

The Cops Security Checker System, Daniel Farmer, Eugene H. Spafford

Department of Computer Science Technical Reports

No abstract provided.


A New Organization Of Sparse Gauss Elimination For Solving Pdes, Mo Mu, John R. Rice Jul 1990

A New Organization Of Sparse Gauss Elimination For Solving Pdes, Mo Mu, John R. Rice

Department of Computer Science Technical Reports

No abstract provided.


Typed Token Approach For Database Processing During Network Partitioning, Bharat Bhargava, Shy-Renn Lian Jun 1990

Typed Token Approach For Database Processing During Network Partitioning, Bharat Bhargava, Shy-Renn Lian

Department of Computer Science Technical Reports

No abstract provided.


Computer Viruses--A Form Of Artificial Life?, Eugene H. Spafford Jun 1990

Computer Viruses--A Form Of Artificial Life?, Eugene H. Spafford

Department of Computer Science Technical Reports

No abstract provided.


Communication And Control In Spmd Parallel Numerical Computations, Dan C. Marinescu, John R. Rice, E. A. Vavalis May 1990

Communication And Control In Spmd Parallel Numerical Computations, Dan C. Marinescu, John R. Rice, E. A. Vavalis

Department of Computer Science Technical Reports

No abstract provided.


A Simple Vector Language And Its Portable Implementation, Anar Jhaveri, Hank Dietz May 1990

A Simple Vector Language And Its Portable Implementation, Anar Jhaveri, Hank Dietz

Department of Electrical and Computer Engineering Technical Reports

Many explicitly parallel languages have been proposed and implemented, but most such languages are complex and are targeted to specific parallel machines. The goal of this project was to design a very simple, explicitly parallel, programming language which could easily be implemented and ported to a wide variety of machines. The result was AJL, a structured language with deterministic vector-oriented parallelism. AJL programs are first compiled into assembly language instructions for an idealized parallel machine, then these assembly language instructions are macro expanded into C code which implements them for the actual target machine. Finally, the target machine’s “ native” …


Importance Sampling Simulation Of The Stack Algorithm With Application To Sequential Decoding, Khaled Ben Letaief May 1990

Importance Sampling Simulation Of The Stack Algorithm With Application To Sequential Decoding, Khaled Ben Letaief

Department of Electrical and Computer Engineering Technical Reports

Importance sampling is a Monte Carlo variance reduction technique which in many applications has resulted in a significant reduction in computational cost required to obtain accurate Monte Carlo estimates. The basic idea is to generate the random inputs using a biased simulation distribution. That is, one that differs from the true underlying probability model. Simulation data is then weighted by an appropriate likelihood ratio in order to obtain an unbiased estimate of the desired parameter. This thesis presents new importance sampling techniques for the simulation of systems that employ the stack algorithm. The stack algorithm is primarily used in digital …


Directory Based Cache Coherency Protocols For Shared Memory Multiprocessors, Craig Warner May 1990

Directory Based Cache Coherency Protocols For Shared Memory Multiprocessors, Craig Warner

Department of Electrical and Computer Engineering Technical Reports

Directory based cache coherency protocols can be used to build large scale, weakly ordered, shared memory multiprocessors. The salient feature of these protocols is that they are interconnection network independent, making them more scaleable than snoopy bus protocols. The major criticisms of previously defined directory protocols point to the size of memory heeded to store the directory and the amount of communication across the interconnection network required to maintain coherence. This thesis tries solving these problems by changing the entry format of the global table, altering the architecture of the global table, and developing new protocols. Some alternative directory entry …


Parallel Sparse: Data Structure And Organization, Mo Mu, John R. Rice May 1990

Parallel Sparse: Data Structure And Organization, Mo Mu, John R. Rice

Department of Computer Science Technical Reports

No abstract provided.


The Structure Of Parallel Sparse Matrix Algorithms For Solving Partial Differential Equations On Hypercubes, Mo Mu, John R. Rice Apr 1990

The Structure Of Parallel Sparse Matrix Algorithms For Solving Partial Differential Equations On Hypercubes, Mo Mu, John R. Rice

Department of Computer Science Technical Reports

No abstract provided.


A New Design For Distributed Systems: The Remote Memory Model, Douglas E. Comer, James Griffioen Apr 1990

A New Design For Distributed Systems: The Remote Memory Model, Douglas E. Comer, James Griffioen

Department of Computer Science Technical Reports

No abstract provided.


Information Systems And The Erosion Of Personal Privacy, Scott D. Sterner Apr 1990

Information Systems And The Erosion Of Personal Privacy, Scott D. Sterner

Department of Computer Science Technical Reports

No abstract provided.


Adaptability Experiments In The Raid Distributed Database System, Bharat Bhargava, Karl Friesen, Abdelsalam Helal, John Riedl Apr 1990

Adaptability Experiments In The Raid Distributed Database System, Bharat Bhargava, Karl Friesen, Abdelsalam Helal, John Riedl

Department of Computer Science Technical Reports

No abstract provided.


Data Layout Optimization And Code Transformation For Paged Memory Systems, Lung-Yu Chang, Henry G. Dietz Apr 1990

Data Layout Optimization And Code Transformation For Paged Memory Systems, Lung-Yu Chang, Henry G. Dietz

Department of Electrical and Computer Engineering Technical Reports

Supercomputers need not only to have fast functional units, but also to have rapid access to massive quantities of data. Virtual memory paging and physically distributed memory systems both attempt to provide this large data space, but performance of a computer system using either memory organization is highly dependent on the page reference pattern and the number of pages available locally. Despite this, surprisingly little work has been done toward using the compiler to optimize memory system performance. In this paper, we introduce compiler techniques which use a combination of data layout and code transformation to improve paging performance for …


User's Guide For The Nihongo Tutorial System, Kei Wai Leung, Anthony A. Maciejewski Apr 1990

User's Guide For The Nihongo Tutorial System, Kei Wai Leung, Anthony A. Maciejewski

Department of Electrical and Computer Engineering Technical Reports

No abstract provided.


Source Code For The Nihongo Tutor, Kei Wai Leung, Anthony A. Maciejewski Apr 1990

Source Code For The Nihongo Tutor, Kei Wai Leung, Anthony A. Maciejewski

Department of Electrical and Computer Engineering Technical Reports

This document contains a listing of the Pascal source code for the Nihongo Tutor program. This code is designed to be executed on Macintosh computers under the Kanjitalk operating system. It was written by Kei Wai Leung under the supervision of Anthony A. Maciejewski as part of the Nihongo Tutorial System, a set of programs designed to assist scientists and engineers acquire a reading knowledge of technical Japanese. As this is an ongoing project, portions of this code are under revision. This project is funded by the National Science Foundation under Grant No. INT-8818039. The government has certain rights in …


Technical Specifications Of The Nihongo Tutorial System, Kei Wai Leung, Anthony A. Maciejewski Apr 1990

Technical Specifications Of The Nihongo Tutorial System, Kei Wai Leung, Anthony A. Maciejewski

Department of Electrical and Computer Engineering Technical Reports

The Nihongo tutorial system presented here is an intelligent tutorial system designed to use a computer to assist scientists and engineers in developing reading competence in technical Japanese. It is comprised of three applications: the Nihongo Tutor, the Parse Tree Editor and the Administrator. The Nihongo Tutor provides useful information about an article such as an English translation, syntax, and pronunciation to help the student to comprehend the text of a personalized lesson. It also records the student's performance into his personal database which reflects his current Japanese language proficiency. The Administrator uses the personal data of a student to …


Maintaining Quasi Serializability In Hddbss, Weimin Du, Ahmed K. Elmagarmid, Won Kim Mar 1990

Maintaining Quasi Serializability In Hddbss, Weimin Du, Ahmed K. Elmagarmid, Won Kim

Department of Computer Science Technical Reports

No abstract provided.


Critical Issues In Multidatabase Systems, Ahmed K. Elmagarmid, Marek Rusinkiewicz Mar 1990

Critical Issues In Multidatabase Systems, Ahmed K. Elmagarmid, Marek Rusinkiewicz

Department of Computer Science Technical Reports

No abstract provided.


A Multidatabase Transaction Model For Interbase, Ahmed Elmagarmid, Y. Leu, W. Litwin, Marek Rusinkiewicz Mar 1990

A Multidatabase Transaction Model For Interbase, Ahmed Elmagarmid, Y. Leu, W. Litwin, Marek Rusinkiewicz

Department of Computer Science Technical Reports

No abstract provided.


Hybrid Value/Event Representation Of Replicated Objects, Bharat Bhargava, Shirley Browne Mar 1990

Hybrid Value/Event Representation Of Replicated Objects, Bharat Bhargava, Shirley Browne

Department of Computer Science Technical Reports

No abstract provided.


The Second International Conference On Expert Systems For Numerical Computing, John R. Rice, Robert Vichnevetsky, Elias N. Houstis Mar 1990

The Second International Conference On Expert Systems For Numerical Computing, John R. Rice, Robert Vichnevetsky, Elias N. Houstis

Department of Computer Science Technical Reports

No abstract provided.