September 1968 - Vol. 11 No. 9
Features
The “peekaboo” idea from punched card information retrieval methods has been mated with the idea of superimposed punching to produce a programming technique…
Experimental evaluation of information retrieval through a teletypewriter
Experiments designed to evaluate the capabilities of mechanized information retrieval systems, with emphasis on interactive (man-machine) language and on some of the…
Operating Systems: A statistical model for console behavior in multiuser computers
The ability of a computer system to communicate with the outside world efficiently is as important as its ability to perform computations efficiently. It is quite…
Computational Linguistics: Graphical input/output of nonstandard characters
A system developed at Harvard for graphically inputting and outputting nonstandard characters on a computer is printed. In principle, the system can deal with any…
An algorithm for identifying the ergodic subchains and transient states of a stochastic matrix is presented. Applications in Markov renewal programming and in the…
PLEXUS—an on-line system for modeling neural networks
A description is presented of PLEXUS, a system which enables a user to construct and specify a neural network, to analyze the output data produced by the network, and to…
Programming Techniques: An algorithm for the probability of the union of a large number of events
An algorithm is presented which efficiently evaluates the probability for the union of n independent and not mutually exclusive events. The problem is that of evaluating…
Programming Languages: GPL, a truly general purpose language
A truly general purpose programming language, GPL, is described which contains facilities for constructing (within the language) new data types as well as facilities for…
Numerical Analysis: Numerical solution of a thin plate heat transfer problem
The numerical solution of a system of linear equations resulting from a discrete approximation to a thin plate heat transfer problem is considered. The slow convergence…
A comparison of the correlational behavior of random number generators for the IBM 360
Hutchinson states that the “new” (prime modulo) multiplicative congruential pseudorandom generator, attributed to D.H. Lehmer, has passed the usual…