The purpose of this study has been to develop
insight into the aims and goals of public library service by
considering one particular type of library activity--work
with adult groups.
To determine the influence of historical events on
such service, consideration has been given to group work of
the past...
Lithia-silica compositions between lithium disilicate and pure
silica were explored theoretically and experimentally, with special
emphasis on structural miscibility. Diffusion couples of vitreous
materials were prepared and annealed. Best success in preparation
was achieved by using electron-bombardment heating in vacuum to
melt the less refractory glass and let it solidify...
A two-dimensional perturbation theory computer code,
PERT-IV, has been developed that will calculate reactivity
coefficients, the delayed neutron fraction, and the neutron
generation time.
The program uses the output flux and adjoint
flux from either a diffusion theory or transport theory program.
A discussion and derivation of the perturbation equation...
Because of the complicated form of the diffusion equation,
approximations are necessary to treat the energy dependence for
practical problems. The standard model is the few group approximation.
A second approximate form, the overlapping group or modal
method, is examined and more fully developed in this work to provide
an...
The work in this thesis involves the development of specimen preparation techniques for the observation with an electron microscope of alpha
particle tracks in cellulose nitrate plastic.
Both direct observation
using thin films and replica production techniques were investigated.
Direct observation of the alpha tracks was accomplished by cutting
thin...
A method of treating resonance captures for few energy group
calculations is developed using the Narrow Resonance-Infinite
Absorber approximation to the resonance integral. The application
of this method is not restricted to this approximation, however,
as other approximations to the resonance integral could also be
used.
The approach presented defines...
Growth and replacement patterns of four successionally important
species occurring on Douglas fir clear-cuts were investigated
from September 1964 to June 1967. The study was carried out
on the Marys Peak watershed located near Corvallis, Oregon.
Species used in the study include Holcus lanatus, Senecio
jacobaea, Lotus crassifolius var. subglaber,...
Seven sites of uniform topography and soil were selected within
a self perpetuating ponderosa pine forest found on the eastern
flank of the central Oregon Cascades. These plots were located along
a vegetational gradient caused mainly by an orographic rain shadow.
Data gathered included density, frequency, and cover for all...
Twenty sites of uniform topography and soil were select ed in the
montane forest found on the East flank of the Central Oregon Cascades.
These sites were located along a vegetational gradient composed of
five plant communities: Abies/Pachistima, Pinus/Ceanothus, Pinus
Arctostaphylos-Purshia, Pinus/Purshia/Festuca, and Juniperus
Festuca. An attempt was made to...
Research cruises were made between August 28, 1967, and June 19, 1968, to study the vertical distribution and movements of pink shrimp, Pandalus jordani, off Tillamook Head in 68-80 fathoms. Shrimp traps suspended from surface to bottom, midwater trawl, and bottom shrimp trawl nets were used. Results are discussed in...
“During the report period, two survey cruises were completed off Oregon; 96 tows were made in the fall of 1966 and 173 in the spring of 1967. Cruise reports were written for each cruise. In addition, logs showing tow location, length, catch, and other data were distributed to interested fishermen...
The object of the present study was to investigate the stimulatory
or inhibitory effects of barium, boron, bromine, cadmium,
chromium, cobalt, copper, fluorine, iodine, iron, manganese,
molybdenum, nickel, rubidium, selenium, strontium, vanadium, and
zinc upon in vitro rumen microbial activity as measured by the amount
of cellulose digested. Washed suspensions...
The purpose of the present study was to investigate the effect
of a number of physical and chemical attributes upon muskmelon
texture as described by sensory evaluation. Measurements of turgor
pressure, percent moisture, total sugars, alcohol-insoluble-solids,
three pectic fractions, total pectic materials, starch and cellulose
were performed on 50 melons....
The infrared spectra of liquid and solid films of
formaldehyde were taken over the range of 35 to 4,000 cm⁻¹
using Beckman IR 7 and IR 11 spectrometers. A new overtone
band and a new combination band were found as well as three
fundamental peaks due to lattice vibrations and...
This study was conducted to investigate the production and processing technology of common ryegrass screenings and to determine
the nutritive value of these screenings for sheep. The animal response
to them was assessed when the sheep were fed on the screenings
alone and in combination with other feedstuffs.
Four in...
Experiments were performed to determine whether a direct
correlation exists between the growth rates of tall and dwarf peas
grown either in the light or in the dark and endogenous gibberellin
(GA) content. Three separate but related experimental approaches
were utilized: (1) the determination of possible qualitative and /or
quantitative...
The purpose of this study was to compare the effectiveness of
teaching high school health by team teaching and traditional teaching
methods. For this study 114 second-semester sophomore health
students from Centennial High School in Gresham, Oregon were
used, distributed in three health classes as a control group, utilizing
traditional...