Coupled experiment/finite element analysis on the mechanical response of porcine brain under high strain rates.

This paper presents a coupled experimental/modeling study of the mechanical response of porcine brain under high strain rate loading conditions. Essentially, the stress wave propagation through the brain tissue is quantified. A Split-Hopkinson Pressure Bar (SPHB) apparatus, using a polycarbonate (viscoelastic) striker bar was employed for inducing compression waves for strain rates ranging from 50 to 750 s(-1).

A minimum-interrupt digital interface for the Coulter S blood analyzer and IBM 1800 computer.

A computer interface for the fully automatic transfer of data from a Coulter model S blood analyzer to an IBM 1800 data acquisition and control system is described. The design objective was to eliminate manual handling of hematology data in order to enhance the reporting effectiveness of a computer-supported clinical pathology laboratory. Using integrated circuits and optical isolation techniques, the interface requires no modification of either the Coulter analyzer or the IBM computer.