From the time when fluoroscopic screens were first used there
have been scattered references to reduction in their light output due
to age, use, etc. References are scarce and usually devoid of
quantitative data. A long-range program has been set up in an effort
to arrive at some meaningful information....
The objective of this study was to determine the relative speeds
of available medical x-ray films exposed directly to x-rays and exposed
in combination with various types of intensifying screens. The
information obtained from this sensitometric data was used to obtain
factors by which a radiographic exposure technique with one...
The relationship of x-ray tube housing temperature to duty
cycle was studied for a superficial therapy x-ray installation, a
dental radiographic installation, and a rotating-anode medical diagnostic
installation. Thermistors were used to measure the tube
housing temperature at points selected to be representative of
thermal conditions on the surface of...
Voltage calibration methods used with X-ray tubes are either
electrical procedures requiring direct electrical connection or
ionization techniques which require no electrical connection to the
generating system. One major restriction on the use of electrical
methods for measuring the voltage applied to X-ray tubes is that
special electrical adaptors are...
A design for an x-ray machine to be used as a visual aid for the
instruction of x-ray theory and x-ray machine operation has been
presented. From this design an x-ray machine was constructed and
Components used in an x-ray machine have been divided in
to three sections; a...
Much has been written concerning the establishment and improvement
of the athletic program in large high schools. However, much of that
which is applicable to large high schools is not applicable to the smaller
The chief purposes of this study were to explore the athletic equipment
problems of the...
It is generally assumed that multi-species fleets operate in a generalist
fashion, given diversity of gears employed. An analysis of gears, species
and spatial fishing effort allocation can give an indication if those patters
are indeed common in these types of fleets. In this paper we examine the
Published April 1982. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog