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ScholarsArchive at Oregon State University
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The spectrum of the interior transmission problem is related to the unique
determination of the acoustic properties of a body in thermoacoustic imaging.
Under a non-trapping hypothesis, we show that sparsity of the interior transmission spectrum...
2013-10 (iso8601)
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Exogenous and indigenous inclusions are defined and described
with respect to their origins and effects in cast steel. Means of
minimizing exogenous inclusions thru prevention of their formation
as well as entrapment in the mold filling system are...
1971-04-20 (iso8601)
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This thesis is an experimental study of an acoustic
surface wave delay line using a Lithium Niobate crystal.
A brief theory of operation of the interdigital transducer
with its advantages over the other methods of exciting and
detecting acoustic...
1971-01-15 (iso8601)
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Transdisciplinary approaches and innovative combinations of social and ecological theory are required to deal with complexity and change in fisheries and other human-ecological systems. This paper examines the interplay and complementarities that...
2012 (iso8601)
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Environmental swabs and meat samples from two of three seafood
processing plants sampled on the Oregon Coast were found to
contain Salmonella. Although these enteropathogens were not isolated
from the finished products, the danger of contamination...
1970-12-18 (iso8601)
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Microsclerotia (MS) production by two isolates of Lecanicillium lecanii on various culture media is described, and the efficacy of MS against western flower thrips is evaluated. High concentrations of MS (2.9-3.1×10⁵•mL⁻¹) were produced in media...
2013-02-01 (iso8601)
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Climate change is set to have far-reaching ecological and economic consequences for the African continent and globally. Developing countries are particularly vulnerable to climate change, not only as a consequence of resource and technology...
2012 (iso8601)
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Marine mammals and sea turtles are protected from commercial fishery interactions under the U.S. Marine Mammal Protection Act and Endangered Species Act . By design, enforcing area closures is generally less problematic than gear modifications...
2012 (iso8601)
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The thesis area consists of 44 square miles in southeast Harney
County, Oregon. The Pueblo Mountains are located in the northwest
part of the Basin and Range structural province, and are characterized
by normal faults of large displacement that...
1971-06-24 (iso8601)
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Race identification of stripe rust (Puccinia striiformis West. )
is influenced by environment, pathogen variability and host age.
Isolates of stripe rust were collected in the Pacific Northwest and
characterized on two sets of differential...
1971-08-20 (iso8601)
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The pulmonary function scores of 250 male cigarette smokers
were compared with 406 lifetime nonsmokers. A Stead-Wells spirometer
was used to obtain forced vital capacity, forced expiratory
flow, forced mid-expiratory flow, and forced expiratory...
1971-11-24 (iso8601)
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School systems have an important responsibility to continuously
examine and review their educational programs to determine if the
programs satisfy the needs of the youth they serve. Systematically
collected data derived from former and present...
1971-09-28 (iso8601)
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In the last 30 years, birdsfoot trefoil (Lotus corniculatus L. )
has been recognized as a great potential source of forage. Since the
1930's, many studies have been reported in relation to birdsfoot
trefoil characteristics, including some directly...
1970-08-06 (iso8601)
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Under adverse soil moisture conditions a critical water stress
or water potential develops in the plant and productivity is reduced,
or in extreme cases, terminated. Research to determine the soil
moisture status for maximum production of specific...
1971-05-06 (iso8601)
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Some of the problems concerning the present educational programs
which confront the institutions of higher education are, reviewed.
Resources allocation is at the root of the issue.
Budgeting orientations are presented with special emphasis on...
1970-08-14 (iso8601)
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The reaction between 4- chloro- 6- methoxy- 5-nitropyrimidine
and methylamine was investigated. The reaction product was identified
as 4-methoxy-6-methylamino-5-nitropyrimidine from synthesis
of the product via...
1970-06-09 (iso8601)
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The study was undertaken for the purpose of investigating the
relationship between clothing behavior and sex, Japanese and American
cultures, feminine or masculine personality types, and sex-role
concepts. The aspects of clothing behavior included...
1970-10-22 (iso8601)
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The extent of the competitive effect of wild oats on winter wheat
yield was estimated in field studies on three commercial wheat farms in
the Willamette Valley. The morphological development of the wild oat
plants was also documented.
Wild oats...
1970-11-20 (iso8601)
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In the study of gas chromatography a model is presented to simulate
a capillary gas chromatographic system. The model was developed
to study the concentrations of sample gas as a function of time and
space as it travels through the capillary...
1970-07-15 (iso8601)
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In the first part of this thesis,
two new classes of rational approximations to the ideal delay function
based on the Khovanskii continued fraction expansion of e[superscript]x
are studied in detail in both the frequency domain and the time domain...
1970-06-23 (iso8601)
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This thesis is concerned with the design of the high speed tape
read-out and tape feed control circuits and interface to the PDP-8/L
Computer system, The system was designed to operate under the
programmed data transfer mode of the computer, and...
1971-04-16 (iso8601)
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Six polycyclic aliphatic hydrocarbons were reacted with the
trichloromethyl radical photolytically generated from bromotrichloromethane
at 40°. Relative rates of reaction were correlated
with a computer analysis of the change in strain energy in...
1970-08-21 (iso8601)
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The effects of zinc and phosphorus treatments on five different
plant species were investigated in a greenhouse experiment. A
second greenhouse experiment extended these investigations in sweet
corn over a broad range of phosphorus treatments with...
1970-07-10 (iso8601)
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An experimental underwater acoustic imaging system has been
designed and built. Operating at 650 KHz, real time acoustic images
are obtainable. Using both geometrical optics and Fourier optics,
the theory of image formation and resolution is...
1970-06-03 (iso8601)
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