April 1965 - Vol. 8 No. 4
Features
This paper gives the considerations of Task Group X3.3.4 in the area of transparent-mode data communication control philosophy. The appearance of this paper was forecast…
CLP-the Cornell list processor
Presented in this paper are the highlights of CLP, a teaching language which has been employed at Cornell University and was constructed to serve as a means of…
The use of FORTRAN in subroutines with COBOL main programs
By using the proper COBOL coding techniques and accounting for differences in storage allocation and library routines between the two languages, it is possible to write…
Data input by question and answer
A data input scheme for a time-sharing computer is described in this paper. Instead of using format statements to determine the input, the computer asks the user for the…
Numerical integration of a differential-difference equation with a decreasing time-lag
Systems in which variable time-lags are present are of common occurrence in biology. Variable flow rates are a common cause of these variable lags. At present no…
Use of a conditional base number system for encoding sequences of correlated characters
A procedure is described for the relatively efficient encoding of sequences of characters which have predecessor-successor selection rules. The procedure is shown to…
Wengert’s numerical method for partial derivatives, orbit determination and quasilinearization
In a recent article in the Communications of the ACM, R. Wengert suggested a technique for machine evaluation of the partial derivatives of a function given in analytical…
The use of COBOL subroutines in FORTRAN main programs
If a problem requires both complicated calculations and edited output printing, then the computing part can be efficiently handled in FORTRAN and the editing part, e.g.…
Still another use for FORTRAN II chaining
This is to report a further use of the FORTRAN II Chain System. We, at Sandia, have modified the Chain subroutine to allow for picking up chains from the disk instead of…
A method for the numerical solution of the n-point boundary value problem for homogeneous linear ordinary differential equations is developed. The method requires two…
A modified form of Romberg quadrature is described, which is less sensitive to the accumulation of rounding errors than the customary one.
Expanding the editing function in language data processing
In automatic abstracting, citation indexing, mechanical translation and other such procedures, editing is required whenever the automatic method leaves something to be…
Secondary key retrieval using an IBM 7090-1301 system
The secondary key retrieval method involves the preparation of secondary storage lists from primary data records. Search requests are satisfied by logical operations on…