July 1967 - Vol. 10 No. 7
Features
The simulation of time sharing systems
The development of new large scale time-sharing systems has raised a number of problems for computation center management. Not only is it necessary to develop an…
A user-oriented time-shared online system
An existing system and planned additions within the Data Processing Laboratory of the Brain Research Institute at UCLA is described. The system represents an attempt to…
The internal organization of string processing systems is discussed. Six techniques for data structures are presented and evaluated on the basis of: (1) creation of…
Implementing phrase-structure productions in PL/I
A method is described for implementing the productions of a context-free phrase structure grammar in a PL/I procedure whose structure and statements parallel the…
Plotting a function of three independent variables
A method is developed for constructing an approximate plot of a function of three independent variables. The plot is similar to a conventional contour map except that…
On the representation of symmetric polynomials
Relations are given between certain symmetric polynomials in the light of the theory of the symmetric group. Such an approach unifies earlier work and lends insight to…
Optimal starting values for Newton-Raphson calculation of x1 2
The problem of obtaining starting values for the Newton-Raphson calculation of √x on a digital computer is considered. It is shown that the conventionally used best…
A language independent macro processor
The problem of obtaining starting values for the Newton-Raphson calculation of √x on a digital computer is considered. It is shown that the conventionally used best…
Description of basic algorithm DETAB/65 preprocessor
The basic algorithm for the conversion of decision tables into COBOL code is contained in the generator portion of the DETAB/65 preprocessor. The generator analyzes a…
A method for finding Hamilton paths and Knight’s tours
The use of Warnsdorff's rule for finding a knight's tour is generalized and applied to the problem of finding a Hamilton path in a graph. A graph-theoretic justification…
Changes in government procurement policies
Several years ago there was an attempt in Washington to place the selection of government computers in a central, highly placed office. Individual government agencies,…