Automatic Logarithmic Recorder for Frequency Response Measurements

Automatic fraction collectors and a conductivity recorder.

In recent years a variety of designs of automatic fraction collectors have appeared (Brimley & Snow, 1949; Cuckow, Harris & Speed, 1949; Edman, 1948; Phillips, 1949; Stein & Moore, 1948). The collectors described here possess the advantages that they are simple and cheap to construct and have given reliable service over long periods. The three machines all operate on the same principle, involvi...

A semi-automatic blood pressure recorder.

IN the recent past a number of blood pressure recorders for clinical use, and especially during anaesthesia, have been described (Molyneux and Pask, 1953; Simpson, 1956). It seemed, however, that these recorders had several disadvantages and that there was a place for an instrument that was cheap, simple and not a possible source of an explosion when used in the vicinity of explosive anaestheti...

The Remler M2000 semi-automatic blood pressure recorder.

Semi-analytical response of acoustic logging measurements in frequency domain

This work proposes a semi-analytical method for simulation of the acoustic response of multipole eccentered sources in a fluid-filled borehole. Assuming a geometry that is invariant with respect to the azimuthal and vertical directions, the solution in frequency domain is expressed in terms of a Fourier series and a Fourier integral. The proposed semi-analytical method builds upon the idea of s...

Identiication in H 1 with Nonuniformly Spaced Frequency Response Measurements

In this paper, the problem of \system identi cation in H 1 " is investigated in the case when the given frequency response data is not necessarily on a uniformly spaced grid of frequencies. A large class of robustly convergent identi cation algorithms are derived. A particular algorithm is further examined and explicit worst case error bounds (in the H 1 norm) are derived for both discrete-time...