An algorithm is described for determining the vertices
and supporting planes (or lines) of the convex hull
of a given set of N distinct points in 3-space. The
method involves determining a finite sequence of convex
hulls, each successive convex hull being a better approximation
to the convex hull of...
A liquid-extraction procedure for the concentration of zinc in
sea water was developed. The metal ion in sea water was chelated
with sodium diethyldithiocarbamate and extracted into an organic
solvent, methylisobutylketone, at the normal pH of sea water. A
back-extraction into HCl followed, providing a concentration of 30X
for the...
The major purpose of this study was to determine if there was
relationship between the power of the influence techniques used by
teacher in a nursery school setting and the response of the children
to these techniques.
The subjects were sixteen nursery school children and two
trained nursery school teachers...
This investigation was undertaken to develop a procedure
by which the fatty acids could be separated from the
hydroxy fatty acids of bark waxes. The specific hexane-insoluble, benzene-soluble wax used in this research was obtained
from the bark of white fir, Abias concolor, (Lindl.
and Gord.).
The acids were removed...
The purpose of this study was to compare the quality of data
obtained from individual oral and group written administration of a
classroom simulation test. The individual oral procedure involved
one group of subjects taking the simulator test individually and responding
orally, while the group written procedure involved another
group...
The primary intent of this study was to clarify the role of the
endophyte in the Ceanothus symbiosis.
A technique utilizing a 20 percent solution of H₂O₂ was developed
which allowed the isolation of a Streptomyces sp. from the root
nodules of some Ceanothus species. Further characterization suggested
that the...