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Articles 56371 - 56400 of 57960

Full-Text Articles in Physical Sciences and Mathematics

Attribute Relationships: An Impediment In Automating Schema Integration, Amit P. Sheth, Sunit K. Gala Dec 1989

Attribute Relationships: An Impediment In Automating Schema Integration, Amit P. Sheth, Sunit K. Gala

Kno.e.sis Publications

Success in schema integration depends on understanding the semantics of schema components (e.g., entity sets, relationship sets, attributes), and the ability to capture and reason about these semantics. An important objective of our work on schema integration is to automate the reasoning as much as possible, and when not possible, depend on the human input and guidance. A key results of comparing the semantics associated with schema objects is that of determining attribute relationship. Once attribute relationships are determined, the task of object class(e.g., entity sets and relationship sets) integration becomes simpler and can e automated to a great extent. …


Data Base Design For Research In Comparative Zapotec, Anita C. Bickford Dec 1989

Data Base Design For Research In Comparative Zapotec, Anita C. Bickford

Theses and Dissertations

This thesis explores the nature and content of a comparative data base for the Zapotec languages of Mexico that may be produced. Many questions are discussed: how to sub-divide and list the Zapotec languages and dialects; what data format will be most accessible to researchers as well as to field workers with data to add; computer software considerations (designing computational tools); how to handle non-cognates with shared meanings, non-overlap of glosses (i.e., one Zapotec gloss covers several Spanish words, or vice versa), semantic shifts and secondary meanings, and other problems such as special characters, free variation, elisions, etc.; whether to …


Computer Vandalism And The Law, Eugene H. Spafford Nov 1989

Computer Vandalism And The Law, Eugene H. Spafford

Department of Computer Science Technical Reports

No abstract provided.


On The Analysis Of The Tail Queue Length And Waiting Time Distributions Of A Gi/Gi/C Queue, John S. Sadowsky, Wojciech Szpankowski Nov 1989

On The Analysis Of The Tail Queue Length And Waiting Time Distributions Of A Gi/Gi/C Queue, John S. Sadowsky, Wojciech Szpankowski

Department of Computer Science Technical Reports

No abstract provided.


A Workload Partitioning Strategy For Pdes By A Generalized Neural Network, Elias N. Houstis, S. K. Kortesis, H. Byun Nov 1989

A Workload Partitioning Strategy For Pdes By A Generalized Neural Network, Elias N. Houstis, S. K. Kortesis, H. Byun

Department of Computer Science Technical Reports

No abstract provided.


A Computer Virus Primer, Eugene H. Spafford, Kathleen A. Heaphy, David J. Ferbrache Nov 1989

A Computer Virus Primer, Eugene H. Spafford, Kathleen A. Heaphy, David J. Ferbrache

Department of Computer Science Technical Reports

No abstract provided.


The Internet Worm Incident, Eugene H. Spafford Nov 1989

The Internet Worm Incident, Eugene H. Spafford

Department of Computer Science Technical Reports

No abstract provided.


Fast Parallel Lyndon Factorization With Applications, Alberto Aposiolico, Maxime Crochemore Nov 1989

Fast Parallel Lyndon Factorization With Applications, Alberto Aposiolico, Maxime Crochemore

Department of Computer Science Technical Reports

No abstract provided.


Experimental Facility For Kernel Extensions To Support Distributed Database Systems, Bharat Bhargava, Enrique Mafla, John Riedl Nov 1989

Experimental Facility For Kernel Extensions To Support Distributed Database Systems, Bharat Bhargava, Enrique Mafla, John Riedl

Department of Computer Science Technical Reports

No abstract provided.


On The Convergence Of The Modified Accelerated Overrelaxation (Maor) Method, A. Hadjidimos, A. Psimarni, A. K. Yeyios Nov 1989

On The Convergence Of The Modified Accelerated Overrelaxation (Maor) Method, A. Hadjidimos, A. Psimarni, A. K. Yeyios

Department of Computer Science Technical Reports

No abstract provided.


The Display And Manipulation Of Temporal Information, Steve B. Cousins, Michael G. Kahn Washington University In St. Louis, Mark E. Frisse Washington University In St. Louis Nov 1989

The Display And Manipulation Of Temporal Information, Steve B. Cousins, Michael G. Kahn Washington University In St. Louis, Mark E. Frisse Washington University In St. Louis

All Computer Science and Engineering Research

Because medical data have complex temporal features, special techniques are required for storing, retrieving, and displaying clinical data from electronic databases. One significant problem caused by the temporal nature of medical data has been called the temporal granularity problem. The temporal granularity problem is said to occur when the set of facts relevant to a specific problem changes as the time scale changes. We argue that what is needed to deal with changes in the relevant time scale are temporal granularity heuristics. One heuristic that we have explored is that, for any level of problem abstraction, and for each type …


An Extended Transaction Model For Multidatabase Systems, Yungho Leu, Ahmed K. Elmagarmid, Marek Rusinkiewicz Nov 1989

An Extended Transaction Model For Multidatabase Systems, Yungho Leu, Ahmed K. Elmagarmid, Marek Rusinkiewicz

Department of Computer Science Technical Reports

No abstract provided.


Efficient Geometric Algorithms In The Erew-Pram, Danny Z. Chen Nov 1989

Efficient Geometric Algorithms In The Erew-Pram, Danny Z. Chen

Department of Computer Science Technical Reports

No abstract provided.


On The Optimality Of The Counter Scheme For Dynamic Linear Lists, Micha Hofri, Hadas Shachnai Nov 1989

On The Optimality Of The Counter Scheme For Dynamic Linear Lists, Micha Hofri, Hadas Shachnai

Department of Computer Science Technical Reports

No abstract provided.


Wright State University College Of Engineering And Computer Science Bits And Pcs Newsletter, November 1989, College Of Engineering And Computer Science, Wright State University Nov 1989

Wright State University College Of Engineering And Computer Science Bits And Pcs Newsletter, November 1989, College Of Engineering And Computer Science, Wright State University

BITs and PCs Newsletter

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


On The Height Of Digital Trees And Related Problems, Wojciech Szpankowski Nov 1989

On The Height Of Digital Trees And Related Problems, Wojciech Szpankowski

Department of Computer Science Technical Reports

No abstract provided.


Ua66/3/2 Computer Science Alumni Newsletter, Vol. 5, Wku Computer Science Nov 1989

Ua66/3/2 Computer Science Alumni Newsletter, Vol. 5, Wku Computer Science

WKU Archives Records

Newsletter created by WKU Computer Science for the alumni of the program.


Transaction Accessibility And Integrity Issues In Heterogeneous Distributed Database Systems, Weimin Du, Ahmed K. Elmagarmid, Marek Rusinkiewicz Oct 1989

Transaction Accessibility And Integrity Issues In Heterogeneous Distributed Database Systems, Weimin Du, Ahmed K. Elmagarmid, Marek Rusinkiewicz

Department of Computer Science Technical Reports

No abstract provided.


Protosolid: An Inside Look, George Vanecek Oct 1989

Protosolid: An Inside Look, George Vanecek

Department of Computer Science Technical Reports

No abstract provided.


Obtaining Boundaries With Respect: A Simple Approach To Performing Set Operations On Polyhedra, George Vanecek Oct 1989

Obtaining Boundaries With Respect: A Simple Approach To Performing Set Operations On Polyhedra, George Vanecek

Department of Computer Science Technical Reports

No abstract provided.


A Hierarchical Approach To Concurrency Control For Multidatabases, Ahmed K. Elmagarmid, Yunhho Leu Oct 1989

A Hierarchical Approach To Concurrency Control For Multidatabases, Ahmed K. Elmagarmid, Yunhho Leu

Department of Computer Science Technical Reports

No abstract provided.


Polygon Nesting And Robustness, Chanderjit Bajaj, Tamai Dey Oct 1989

Polygon Nesting And Robustness, Chanderjit Bajaj, Tamai Dey

Department of Computer Science Technical Reports

No abstract provided.


Proof Of A Mutual Exclusion Algorithm-- A `Class'ic Example, Micha Hofri Oct 1989

Proof Of A Mutual Exclusion Algorithm-- A `Class'ic Example, Micha Hofri

Department of Computer Science Technical Reports

No abstract provided.


Parallel (//) Ellpack Pde Solving System, Elias N. Houstis, John R. Rice, N. P. Chrisochoides, H. C. Karathansis, P. N. Papachiou, E. A. Vavalis, K. Wang Oct 1989

Parallel (//) Ellpack Pde Solving System, Elias N. Houstis, John R. Rice, N. P. Chrisochoides, H. C. Karathansis, P. N. Papachiou, E. A. Vavalis, K. Wang

Department of Computer Science Technical Reports

No abstract provided.


Efficient Heap Implementation With A Fixed-Size Linear Systolic Array, Jyh-Jong Tsay Oct 1989

Efficient Heap Implementation With A Fixed-Size Linear Systolic Array, Jyh-Jong Tsay

Department of Computer Science Technical Reports

No abstract provided.


Wright State University College Of Engineering And Computer Science Bits And Pcs Newsletter, October 1989, College Of Engineering And Computer Science, Wright State University Oct 1989

Wright State University College Of Engineering And Computer Science Bits And Pcs Newsletter, October 1989, College Of Engineering And Computer Science, Wright State University

BITs and PCs Newsletter

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


Optical Machine Recognition Of Lower-Case Greek Characters Of Any Size, Ivan X. D. D'Cunha Oct 1989

Optical Machine Recognition Of Lower-Case Greek Characters Of Any Size, Ivan X. D. D'Cunha

Electrical & Computer Engineering Theses & Dissertations

An algorithm utilizing a syntactic approach and a criterion based on normalized moments is defined for the reliable, automatic, machine recognition of handwritten and printed Greek characters of any size and font. In this approach a binary image of the character in question is obtained initially; its skeleton is then produced by utilizing a standard thinning algorithm. The classification process then incorporates the topological features of the characters such as existence of closed curves, number of intersections, number and location of free ends, axial symmetry, and the criteria derived from normalized moments to uniquely identify each pattern. Experiments conducted demonstrated …


High Rate Concatenated Coding Systems Using Multidimensional Bandwidth Efficient Inner Codes, Robert H. Deng, Daniel J. Jr. Costello Oct 1989

High Rate Concatenated Coding Systems Using Multidimensional Bandwidth Efficient Inner Codes, Robert H. Deng, Daniel J. Jr. Costello

Research Collection School Of Computing and Information Systems

A concatenated coding system using two-dimensional trellis-coded MPSK inner codes and Reed-Solomon outer codes for application in high-speed satellite communication systems was proposed previously by the authors (ibid., vol.37, no.5, p.420-7, May 1989). The authors extend their results to systems using symbol-oriented, multidimensional, trellis-coded MPSK inner codes. The concatenated coding systems are divided into two classes according to their achievable effective information rates. The first class uses multidimensional trellis-coded 8-PSK inner codes and achieves effective information rates around 1 b/dimension (spectral efficiency 2 b/s/Hz). The second class employs multidimensional trellis-coded 16-PSK inner codes and provides effective information rates around 1.5 …


Design Considerations For Distributed Scientific Software Systems, Paul E. Buis Sep 1989

Design Considerations For Distributed Scientific Software Systems, Paul E. Buis

Department of Computer Science Technical Reports

No abstract provided.


Simple Performance Models For Computationally Intense Remote Procedure Calls, Paul E. Buis Sep 1989

Simple Performance Models For Computationally Intense Remote Procedure Calls, Paul E. Buis

Department of Computer Science Technical Reports

No abstract provided.