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 probable pollution distribution and flushing times have been
calculated for the Columbia River Estuary, a coastal plain estuary.
The pollution distribution was determined by the fresh water fraction
and by the diffusion equation. The flushing times were calculated by
the modified tidal prism method and by the fraction of...
Purpose of the Study The purpose of this study is to determine the direction of the
emerging role of the teacher aide in Oregon Public Schools and to
make recommendations on the basis of the findings of this study.
Securing and Treating Data
The data for this study were obtained...