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Browsing Computer Science Technical Reports by Issue Date
Now showing items 1-20 of 1036
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Lpl: A Generalized List Processing Language
(Department of Computer Science, Virginia Polytechnic Institute & State University, 1973), CS73009-RThe paper describes LFL, a generalized list processing language. LFL allows the user to define multiple cell structures and cell sizes at runtime, thereby allowing nonhomogeneous list structures. The paper examines the ... -
Dynamic Quantum Allocation and Swap-Time Variability in Time-Sharing Operating Systems
(Department of Computer Science, Virginia Polytechnic Institute & State University, 1973), CS73001-RNo abstract available. -
Functionally Complete Machines
(Department of Computer Science, Virginia Polytechnic Institute & State University, 1973), CS73005-RThis paper defines a functionally complete machine as a machine which is capable of evaluating every two place function over its data space. Necessary conditions on memory size for completeness are developed. These conditions ... -
Fol: A Language for Implementing File Organizations for Information Storage And Retrieval Systems
(Department of Computer Science, Virginia Polytechnic Institute & State University, 1973), CS73008-RThe language FOL is described. FOL facilitates the implementation of file organizations for IS & R systems. FOL is implemented in a list processing language LPL. Files in FOL are interepreted as a list of records, where ... -
A Complete Horizontal Microlanguage
(Department of Computer Science, Virginia Polytechnic Institute & State University, 1973), CS73002-RThis paper defines a data space whose points are trees with leaves which are [name,value] pairs. Over this space a substitution operator S (meaning informally "in x for y put z") is formally defined. Taken together with ... -
A Topological Model of the Data Space for a Block Structured Language
(Department of Computer Science, Virginia Polytechnic Institute & State University, 1973), CS73004-RA space X is defined, the points of which are trees which possess a unique name property. A topology is defined for X based upon partial order. The topology is shown to be reasonably natural relative to the rationals. The ... -
Microprogrammable Cellular Automata
(Department of Computer Science, Virginia Polytechnic Institute & State University, 1973), CS73006-RThis paper reports research into cellular automata with two binary inputs, two binary outputs, and an octal control variable. A set of control variables is chosen and it is shown that any function of three variables can ... -
Generalized Structured Programming
(Department of Computer Science, Virginia Polytechnic Institute & State University, 1973), CS73003-RIn an effort to eliminate some inconveniences connected with Dijkstra's method of Structured Programming, a generalized set of basic flow graphs for structuring programs is suggested. These structures generate the set of ... -
The Dynamic Creation And Modification of Heuristics in a Learning Program
(Department of Computer Science, Virginia Polytechnic Institute & State University, 1973), CS73007-RPOLY FACT is a learning program that attempts to factor multivariable polynomials. The program has been successful in factoring polynomials (in simplified form) with a maximum of 84 terms, each term consisting of as many ... -
On Making Bairstow's Method Work
(Department of Computer Science, Virginia Polytechnic Institute & State University, 1974), CS74003-RNo abstract available. -
An Artificial Intelligence Approach to the Symbolic Factorization of Multivariable Polynomials
(Department of Computer Science, Virginia Polytechnic Institute & State University, 1974), CS74019-RA new heuristic factorization scheme that uses learning to improve the efficiency of determining the symbolic factorization of multivariable polynomials with integer coefficients and an arbitrary number of variables and ... -
Principle of Optimal Page Replacement and the LRU Stack Model
(Department of Computer Science, Virginia Polytechnic Institute & State University, 1974), CS74023-RProgram reference strings generated by the LRU stack model are considered, and expressions for the expected times to next reference for all pages occupying different LRU stack positions are derived. Using these expressions, ... -
The Role of Automatic Digitizers in Computer Aided-design
(Department of Computer Science, Virginia Polytechnic Institute & State University, 1974), CS74026-RThe incorporation of facilities for automatically digitizing documents can considerably enhance the power of computer graphics in computer-aided-design. A hardware-software process is described which rapidly and economically ... -
Definability of Boolean Function Over Many-value Boolean Algebra
(Department of Computer Science, Virginia Polytechnic Institute & State University, 1974), CS74007-RIn this paper, the definability of functions over B_s is first briefly discussed. We then give necessary and sufficient conditions on the definable functions over B_2, boolean algebra of four values. An efficient algorithm ... -
A File Definition Facility for File Structures
(Department of Computer Science, Virginia Polytechnic Institute & State University, 1974), CS74001-RThis paper describes a file definition facility (FDF) for defining files as graph structures. The structure of the file is explicitly declared in the file definition. Primitive functions(from graph theory), operators, and ... -
Three Papers on the Completeness Properties of Abelian Semi groups and Groups
(Department of Computer Science, Virginia Polytechnic Institute & State University, 1974), CS74008-RThe three papers presented here all arise from recent research into sets of operators which are sufficient to define a horizontal microlanguage for a computer and which are (in some undefined sense) natural for human ... -
A Process for Producing Tactually Perceptible Images of Line Drawings for Use by the Blind
(Department of Computer Science, Virginia Polytechnic Institute & State University, 1974), CS74031-RA working prototype computer controlled process is described for automatically converting line drawings into raised line images perceptible to the touch. The process uses an automatic digitizer for input and a milling ... -
A Total Algorithm for Polynomial Roots Based Upon Bairstow's Method
(Department of Computer Science, Virginia Polytechnic Institute & State University, 1974), CS74002-RThis program uses Bairstow's method to find the real and complex roots of a polynomial with real coefficients. There are several reasons for developing a routine based upon Bairstow's method. It is sometimes the case ... -
Some Experimental Observations on the Behavior of Composite Random Number Generators
(Department of Computer Science, Virginia Polytechnic Institute & State University, 1974), CS74014-RA series of experiments with composite random number generators utilizing shuffling tables is described. The factors investigated are: (1) the magnitude of the modulus (equivalently, the word-size of the machine), (2) ... -
The Mixed Method of Random Number Generation: A Tutorial
(Department of Computer Science, Virginia Polytechnic Institute & State University, 1974), CS74013-RSeveral motivations are recognized for user-defined random number generators in preference to built-in generators. The mixed method of random number generation is discussed) and the conditions for achieving full period ...
