A brief history of X-ray control methods is presented, and
the instrumentation requirements and physiological considerations
pertaining to an automatic X-ray control system are discussed.
The latter half of the thesis describes the design and operation
of a device which will permit medical radiographs to be taken
automatically and at...
This study was developed (1) to compare the durability and
comfort of stretch and nonstretch in certain selected denim and
gingham fabrics, (2) to test specific designs as to their self-help
features and (3) to test special features in the designs which might
be adapted easily to ready-made clothing for...
New teaching techniques are the products of a wide
spectrum of research. The final test of all teaching
techniques, however derived, is their application to
a given classroom situation. The purpose of this study
is to determine whether the "principle approach", a
relatively new teaching method in agriculture, has been...
This thesis investigated the methods of failure in the webs of
built up girders. The beams had rectangular holes five and one-half
inches wide and seven and one-half inches high with rounded corners
in a web fourteen inches deep between flanges. The longitudinal
position of the hole edge varied from...
B and C horizon samples from twenty four selected profiles along
a north-south transect in the Willamette Valley were examined for
possible correlation between shrinkage properties and kind of clay
minerals present.
Observations of linear shrinkage, weight loss from a condition
of maximum plasticity, and changing character of X-ray diffraction...
Water and methanol adsorption isotherms at 25° and 37° C.
were determined on a series of organo-bentonite clays. The clays
differed in the length of the carbon chain attached to the amine adsorbed
in the cation exchange position. The amines used had carbon
chains of 4, 6, 8, 10, 12,...
Ten experiments were conducted to determine the vitamin requirements
of coturnix quail (Coturnix coturnix japonica) to 2 weeks
of age using a glucose monohydrate-isolated soybean protein diet.
A preliminary study consisting of 2 separate experiments was
conducted to determine those vitamins essential to the growing
coturnix. This study revealed that...
During construction of the embankment at Blue River Dam
placement difficulties were occasionally experienced with the filter
zone sands. In the extreme condition construction equipment became
mired and part of the fill had to be removed and wasted. A
laboratory investigation was conducted on materials from the above
project to...
The Pacific Coast variety of Douglas-fir was investigated.
The samples were tested using both forced and free vibrations. Transverse
vibrations were introduced by excitations on the side of the
samples. Forced vibrations were applied from 5000 to 0 hertz by a
vibration generator, and free vibrations were initiated by a...
In situ salinity, turbidity and temperature were measured at discrete depths and water samples for radioanalysis were simultaneously collected in the Columbia River Estuary using a specially designed instrument package. Particulate radioactivity was concentrated by filtration and the dissolved radioactivity by evaporation or ferric oxide bulk precipitation. Radioanalysis was by...
The author shows that a necessary and sufficient condition
for a convex polyhedron to be representable as a finite vector sum
of line segments is that each of its faces possesses central symmetry.
The partitioning of body fluids in the Pacific hagfish was investigated
using several experimental techniques. Direct measurement
of the blood volume was obtained through the simultaneous use
of tagged red blood cells and plasma proteins labeled with Evan's
blue dye. Blood cells obtained from donor animals were incubated
with L-methionin-methyl-C¹⁴...
The purpose of this study was to determine the relative resistance
of genetic lines of hops, Humulus lupulus (Linn.) to the
two-spotted spider mite, Tetranychus urticae (Koch) in western
Oregon.
Approximately three-hundred genetic lines of hops were
screened under insectory conditions during the 1965 growing season
at Corvallis, Oregon. Reduction...
This study examines in detail a continuous drop-size distribution
recorder and selected data gathered with this recorder at
various locations on 6, 15, and 31 May 1966. The drop-size distribution
recorder consists of a self-contained, mobile unit able to
operate without electric power. This recorder utilizes "Ozalid 105
SZ" filter...
The extremely fast ionization process in semiconductors offers a means of generating pulses that have sub -nanosecond rise times and high peak powers. There are several important applications of these pulses which require the duration of the generated pulse to be variable. This thesis investigates three methods of producing variable...
The vapor pressures of propylene carbonate and iso-propyl
benzoate were measured by the comparative ebulliometric method.
The range of vapor pressures were from 24.8 mm Hg to 620 mm Hg
for propylene carbonate and from 56.2 mm Hg to 760 mm Hg for
iso-propyl benzoate. To correlate the experimental data...
The
experimental
procedure
for
evaporating
silicon
monoxide
together
with
the
methods
for
measuring
the film
thickness
have
been
investigated.
The
effects
of
various
process
parameters
on
the
rate
of
deposition,
such
as
source
temperature
and
source-substrate
distance,
have
been
studied.
The
uniformity
of
silicon
monoxide
films
deposited
by
this
particular...
The enactment of the Vocational Education Act of 1963,
plus the Manpower Development and Training Act of 1962 and the
Economic Opportunity Act of 1964 have stimulated renewed vigor
into the nation's vocational education programs. As a direct
result of these acts, new and revised programs are being developed
to...
The use of petroleum oil prevented, to varying degrees: the
transmission of three stylet-borne viruses in three different crops.
The use of oils resulted in a marked improvement in the number of
lily bulbs harvested from treated plots as compared to the number of
lily bulbs harvested from untreated plots....
The biological preparation of aflatoxins was accomplished by
culturing the mold Aspergillus flavus on various media. Aflatoxin
was isolated by chloroform extraction of the culture, and purified
by column fractionation and crystallization. Rice, wheat, soya bean,
peanut and YES media were found to give high yields of aflatoxin. It
was...
In this paper, we are concerned with the very general notion of
a universal algebra. A universal algebra essentially consists of a set
A together with a possibly infinite set of finitary operations on. A.
Generally, these operations are related by means of equations, yielding
different algebraic structures such as...
In the study of uniform convergence, one is led naturally to
the question of how uniform convergence on subsets relates to uniform convergence on the whole space. This paper develops theorems on how pointwise convergence relates to uniform convergence
on finite sets, how uniform convergence on finite subsets relates to...
Unifications among agricultural cooperatives are becoming increasingly commonplace. This process is prompted by the desire to achieve economies of size, to reduce operating costs, to achieve product diversification, to improve the quality of offered services, to eliminate overlapping memberships, and to achieve marketing and/or bargaining power. Historical data indicate that...
The seeds of Douglas fir, a representative of the gymnosperm
flora, were studied at six stages of germination to discern the structures
of food reserves and to study ultrastructural changes occurring
during germination in the embryo and resulting seedlings.
The materials were fixed in three fixatives, dehydrated with
ethanol series,...
Two-stage sulfite pulping conditions were determined which
produced a high-yield high-hemicellulose pulp from red alder (Alnus
rubra Bong.). Those cooks with a bisulfite first-stage and an alkaline
second-stage produced pulps with the highest hemicellulose
content and the highest strength properties.
The major hemicellulose in red alder is 0-acetyl-(4-0-
methylglucurono)xylan. Removal...
This thesis discusses the design and evaluation of an instrument
that can detect known signals in noise. This detector uses
two integrators to sense a difference in the received signal between
half-cycles of the known signal.
The detector is useful for sensing signals in the approximate
frequency range of 100...
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...
Heat transfer from the inner wall of an annulus to subcooled
water in turbulent parallel flow was studied. The inner core of the
annulus consisted of wires varying from 0.0019 to 0.0197 inch in
diameter. The outer tube consisted of a 1.01 inch diameter glass
tube 24 inches long. Diameter...
The purpose of this study was to discover what the present trends,
practices and beliefs of home economics educators were concerning
the teaching of the undergraduate special home economics methods
courses. In order to accomplish this purpose it was believed desirable
to discover what was being done and what home...
An evaluation of the service time of an activated carbon adsorption
column and the organic carbon removal efficiency treating activated
sludge process effluent was completed at aerator detention
times of three, five, and ten hours. Parameters used for evaluation
of treatment were biochemical oxygen demand, chemical oxygen
demand, total organic...
The recent development of the laser has made possible
communications with a beam of coherent light.
Since coherent light offers great advantages over radio
in the areas of beam directivity and information capacity,
optical communication systems have been proposed
for many uses.
The first section of this thesis gives a...
A method of locating electric transmission line towers using
ground survey data in a digital computer program is presented in this
thesis. The towers are located for maximum spacing subject to the
constraints of available tower heights, forbidden ground areas, minimum
ground clearance, and specified conductor tensions. The digital
method...
A knowledge of the time rates for intermediate reactions
during the photolysis of nitrogen dioxide enables one to deduce the
possible intermediate reactions which are responsible. An experiment has been devised and constructed which will measure the time
rates for photochemical reactions occurring in ranges of one micro
second to...
The purpose of this study was to determine if personality
traits relevant to creativity in adults are measurable in four year
old nursery school children. Instruments and scoring techniques
were developed to measure six specific traits. These traits are
the intellectual aptitude abilities of figural fluency, elaboration,
originality and penetration...
In this study of toxigenic and non-toxigenic strains of Clostridium
botulinum type E, attempts were made to induce toxin production
in non-toxigenic cultures by exposure to mutagenic agents
and to differentiate the organisms by immunodiffusion. First, cultures
of non-toxic Cl. botulinum type E were exposed to various
mutagenic agents in...
The variation in fatty acid composition between the "bound" and
"free" lipid in stored anchovy meal was determined using gas-liquid
chromatographic analysis. A model system of fresh anchovy oil on
powdered lactalbumin was also studied to determine the changes in
extractability and fatty acid composition which occur during oxidation.
All...
Creep in wood has been observed since 1833 but only recently
has it been studied quantitatively. The aim of this paper is to study
the time-dependent deflections of Douglas fir, Coast Region beams
in bending and shear modes. The general method of approach used is
that of large scale observation....
Hens were artificially inseminated at 8:00 a.m., 4:00 p.m.
and 11:50 p.m. Fertility was found to be significantly lower after
8:00 a.m. inseminations than after 4:00 p.m. or 11:50 p.m. inseminations
for 2 to 6 days, 2 to 9 days and 10 to 17 days following inseminations.
Slightly higher fertility...
A tidal and sea level survey was begun in Yaquina Bay, Oregon,
on 8 May, 1964. A continuous recording tide gage was installed at
the pier of the Oregon State University Marine Science Center.
An harmonic analysis of the observed data was made, and the
major tidal constants were compared...
The study is based on a frame of reference for comparing characteristics
of ordered pairs of members of small groups ("relators" in relation to "co-relatives"). An attempt is made to replicate selected
findings from a study of the acquaintance process reported by
Theodore Newcomb. The effectiveness of three measures of...
Vibrio marinus MP-1, an obligate psychrophilic marine
bacterium, was severely damaged when heat-shocked in the presence
of nutrients. Thermally induced leakage materials from cells tested
for in the medium were 260 mμ absorbing material (nucleic acids),
orcinol reacting material (RNA), ninhydrin reacting material (amino
acids), protein, malic dehydrogenase, and glucose-6-phosphate...
Twelve Acrilan acrylic, twelve Orlon acrylic, and twelve wool
blankets were studied to determine the effect of laundering on thermal
insulation value. The thirty-six blankets used in this study
were selected and purchased by Florence Petzel for use in the study
of the effects of maintenance on wool and acrylic...
Some important factors that affect the dimensional
control of oxide films on silicon were studied. Both N- and
P-type silicon with resistivities in the range of
0.014 to 200 ohm-cm and a (111) surface orientation
were employed in this experiment. The etching rates of
silicon dioxide in hydrofluoric acid (111)...
This thesis presents and discusses a method for comparing
the neutron flux of some calculational model with the actual
flux of a critical system. Both the theoretical and experimental
aspects of this method are investigated in this report.
Experiments were performed to find neutron energy dependent
data. These involved the...
Two populations of the pine needle scale, Phenacaspis pinifoliae
(Fitch), were studied. One population was located in Corvallis,
Oregon, and the other population was located near Santiam Pass,
Oregon. Both populations were feeding on Pinus contorta.
The Corvallis population was unisexual, univoltine, and over
wintered as both eggs and adult...
This thesis is a case study of the Warner Valley Stock Company,
a large eastern Oregon Stock Ranch, which utilizes over
680,000 acres of government grazing land. The purpose is to examine
the background growth, and forces affecting the ranch. The
relationship of man to land can be understood by...
The effects of different nitrogen sources on the primary and secondary pathways of Azotobacter vinelandii cells were studied by means of the radiorespirometric method. C¹⁴ labeled glucose and several key amino acids related to the tricarboxylic acid cycle, such as glutamic acid, aspartic acid, alanine, serine and glycine were used...
There is a lack of available information concerning availability,
usability and utilization of school-owned land in western Oregon,
southwestern Washington and northwestern California. It would be
helpful to know if land is available for agricultural use, how it is used,
and ways that it can be used to give experience...
The purpose of this study was to test Siegel's utility model of
choice behavior under conditions of verbal reinforcement, in a nursery
school population of both sexes. Two major hypotheses were
tested: The ordinal hypothesis stated that under conditions of increased
value of the payoff subjects' stable-state strategies will
occur...
The purpose of the study was to find out how a group of
faculty wives with children used their time and to investigate some
factors in housing and equipment which might influence how they
used their time. A comparison was made between homemakers
with two pre-school age children and homemakers...
In an attempt to improve the mid-season forecast of filbert
production, objective measure techniques were started in 1955 on an
experimental basis. In the following years an adjusted ratio estimate
was used to forecast the filbert production. The purpose of this
study was to review the different assumptions and consider...
This study uses a dynamic linear program to determine the optimum cropping pattern which should be followed by a specific San Joaquin Valley, California, farm in order to maximize returns to fixed factors of production. The study combines as much pertinent information as could be gained from personal interviews with...
A comparative study was made on the effect of urea denaturation
of bovine serum albumin (BSA), polyglycyl BSA and poly-L-phenylalanyl
BSA. The denaturation process was followed by ultraviolet
spectrophotometry and optical rotation.
A blue shift in the absorption maximum at 278 mμ was observed
in urea denatured proteins, In 7M...
The derivation of coefficients for the transfer functions of maximally flat time-delay networks generally begins from an infinite
series approximation of the ideal transfer function. This thesis presents two alternative methods that are particularly suited to cases
involving an unequal number of poles and zeroes in the transfer function. The...
A quality problem that frequently occurs with frozen green beans
is the sloughing of the skin (epidermal tissues) of the cooked, ready-to-
serve bean pods. It was found that by giving the beans a pre-blanch
(relatively mild heat treatment) prior to the blanch treatment normally
used for frozen green beans,...
Classification based on metathoracic wing venation does not
coincide with the existing higher classification of the family Scutelleridae.
The wings of the genera in the Scutellerinae possess a
similar general pattern of venation which is quite distinct from that
of Eurygasterinae, Odontoscelinae, Odontotarsinae, and Pachycorinae.
The Scutellerinae wings possess three...
The possibility of synthesizing 1, 8-naphthyridines by the Doebner reaction has appeared in many reports. The method involves the introduction of electron releasing groups in the 6-position of 2-amino pyridine to activate the C-3 position. Previously Lewis used 6-methyl-2-amino pyridine with benzaldehyde and pyruvic acid, in an attempt to prepare...
3-Methyl-2,4-dioxabicyclo [3.3.1] nonane and 7-hydroxy-3-methyl-2, 4-dioxabicyclo [3.3.1] nonane were synthesized by the
method of Croxall, Glavis and Neher, although in low yields.
The structure of both compounds was proven by analytical
methods and analysis of their spectral properties.
Tentative configuration of C-3 in both compounds was
assigned on the assumption...