Discretization of the time variable by A-stable linear multistep methods in nonlinear evolution equations is considered. Stability and convergence results are presented, which can be applied to multistep-Galerkin procedures for nonlinear initial boundary value problems.

As computing hardware gets cheaper, and labor gets more expensive, the economics of developing relatively limited distribution software such as continuous-system simulation languages for minicomputers (compared to Fortrans and other system software) changes. A philosophy of low-cost software is...

This paper gives a brief overview of some of the present problems and achievements in cardiovascular modeling. Typical of most of the simulations described is a level of complexity such that all-analog simulation often requires too much equipment and all-digital simulation is often too slow....

A two-variables function generator is described, which works on the principle of the cathode ray tube and photo-multiplier. The spot coordinates on the screen are done proportional to the input variables. An optical system projects the spot on a flat function plate and the photomultiplier picks...

The purpose of this paper is to describe an analog simulation of the problem of the dynamic behavior of stressed thin ferromagnetic films and to compare the solution obtained with the results of a digital solution already available and with a digital computer study performed by the authors for...

The electrical analogue provides a useful approach to the solution of Partial Differential Equations. A general purpose analogue for PDEs would be a useful peripheral for a small digital computer, enabling it to handle quickly, cheaply and with reasonable accuracy problems which otherwise...

The accuracy and time required to inseri initial conditions in hybrid computers are important considerations in multiplexing methods. Circuit diagrams are presented that increase the accuracy or reduce the time required to insert the initial conditions in current analog computers. The...