During the summers of 1970 and 1971 a total of 95 sea otter (Enhydra lutris) were shipped to Oregon from Amchitka Island, Alaska. The 1970 shipment consisted of 31 otter which were to be released on the southern Oregon Coast near the town of Port Orford. Two of these animals...
Calling of captive and free-living band-tailed pigeons (Columba fasciata, Say) was studied between June, 1965, and June, 1967, in western Oregon. Vocalizations of captive band-tails were observed during mornings and afternoons in 1965 and 1966; calling of free-living band-tails was observed in mornings during call-counts and point observations in 1966....
The production of crop-milk in band-tailed pigeons was investigated
to estimate losses of squabs that occur from hunting
pigeons during September.¹ Living birds held captive were examined
with a cystos cope and pigeons killed by hunters were examined in the
field to determine changes in gross appearance of crops and...
Plumage development and growth were studied in young whooping
cranes (Grus americana) from hatching until 450 days of age. The
downy stage of the young cranes lasted about six weeks; the development
of the juvenal plumage took until 100 days of age, and the molt
to the adult or all...
This thesis examines three newspapers in Corvallis and Salem,
Oregon: the Corvallis Gazette-Times, the Oregonstatesman (Salem)
and the Community Press (Salem). It examines the histories of the
Gazette-Times and the Oregon Statesman as family-owned papers, and their current status as properties of newspaper chains. Based
on interviews of key staff...
In order to investigate potential climate impacts on landscape-scale ecosystem processes, I implemented a dynamic general vegetation model (DGVM) over a large domain in northern California and western Nevada on a rectangular grid of ca. 800-meter spatial resolution. I used 100 years of observed, monthly climate and nine future climate...
For management purposes, it would be useful to be able to predict streamflow response to forest practices in small, unmonitored basins. The primary objective of this study is to investigate the influence of early successional vegetation on summer streamflow levels. The long-term data records from watershed 1 at the H.J....
Pectic substances in the cell wall have long thought to
be responsible for the textural changes in fruit during
ripening and senescence. Compositional variation within
the pectic macromolecules could affect the external
characteristics of the fruit. Strawberries undergo adverse
quality changes such as softening and juice loss after
freezing and...
Obesity affects one out of every four Americans and represents a
serious health hazard in the United States. Serious chronic diseases
associated with obesity include heart disease, cancer, and adult-onset
diabetes mellitus. There has been a rapid expansion in the number of
weight control centers since the 1970s, yet there...
The relationships between zinc, iron, and phosphorus in sweet
corn were investigated under field and greenhouse conditions. The
soils used in this study (both acid and calcareous) were low in available
zinc and phosphorus.
The experiments received standard, uniform rates of nitrogen
potassium, magnesium, and sulphur. Corn was used as...
The purpose of this study was to compare two progressive weight training programs-- functional isometric and dynamic-- to determine their effects on dynamic and static strength. Sixteen health male college subjects were randomly divided into two training groups. Group A utilized the progressive dynamic weigh training program, and group B...
The objective of this study was to ascertain the magnitude and
distribution of rainfall over coastal waters of the northwestern United
States and to compare values with those at nearby land stations.
Precipitation was measured with gauges at Totem, rainfall amounts
were assessed from weather reports at lightships off the...
Atrazine is an asymmetrical s-triazine herbicide used pre-
and post emergence for weed control in many crops. Triazine herbicides
have been used in the Pacific-Northwest for weed control in
orchard crops. Under certain conditions where trees were grown
in nutrient deficient areas, it was noted that toxic symptoms due to...
Previous research has shown that activated carbon is effective
in inactivating certain herbicides applied as a preemergence treatment.
Studies were conducted in the greenhouse to determine the
influence of various factors on the ability of activated carbon to
inactivate herbicides applied after carbon application. Field studies
were conducted to determine...
The bark beetle Dendroctonus ponderosae Hopkins (Coleoptera:
Scolytidae) has caused severe mortality in recent decades to young
stands of ponderosa pine in the western United States. Insect parasites
and predators, believed to be of importance in the population
dynamics of the beetle, were the subject of the thesis research, conducted...
Maintaining the structural integrity of cell walls
largely determines the texture of fruit products during
freezing processes. Strawberries undergo major textural
changes when frozen, and varietal differences in quality
after thawing are not readily predicted from mechanical
and sensory testing of the fresh fruit. The objectives of
this study were...
Juniper is a native species to Oregon and confers ecological benefits to wildlife when it is at savannah and transitional densities. Its range and extent have fluctuated with climatic change, but the current range expansion is unprecedented in its extent. The range expansion has been associated with the degradation of...
The reliability and sensitivity of enzyme-linked immunosorbent
assay (ELISA) in the detection of ilarvirus (isometric labile ringspot
virus) subgroup B and prune dwarf virus (PDV) isolates in Prunus and
Malus species has been well established. To use this technique in
large scale virus indexing programs more information was required on...
This study was undertaken to determine both the amount and the
spatial variability of sand, silt, clay, and six fractions of coarse
fragments in soils representing harsh sites for reforestation. Particle size data were collected because of their direct relationship to
water holding capacity and the plantability and survivability of...
Studies were conducted in 1969 and 1970 to evaluate the
effectiveness of an experimental herbicide, SD 30053 (alanine,
N-benzoyl-N-(3, 4-dichlorophenyl)-, ethyl ester), for wild oat
(Avena fatua L.) control in winter cereals.
The 1969 field studies showed that postemergence applications
of SD 30053 were effective in controlling wild oats. Wild...
While individual portfolio diversity analysis is a well-studied problem in visualization, the visual analysis of individual or groups of portfolios, over time, has received little attention. Such analysis, however, is important to researchers who are interested in better understanding portfolio management behavior of experts as well as novices. We conducted...
Full dynamic control of physically simulated characters is the holy grail of video
games and other interactive applications. Recent advances in the field have
presented controllers that can handle the balance and fall response after a
collision. This thesis addresses the development of a controller that handles the
response before...
Spreadsheets are a widely used end-user programming tool. Field audits have found that 80-90% of spreadsheets created by end users contain textual and formula errors in spreadsheets. Such errors may have severe negative consequences for users in terms of productivity, credibility, or profits. To solve the problem of spreadsheet errors,...
The U.S Pacific Northwest contains a wide variety of ecosystems, all subject to relatively dry summers and wet winters. As has been shown with paleoclimatic and paleoecological data, the region is vulnerable to changes in climate. We assessed the sensitivities of vegetation distributions, carbon stocks, and fire regimes to 21st...
Six standard coyote scent station index lines and one scentless control line were repeatedly sampled from May through October, 1974, on a 400 square mile study area in Central Oregon. The scent station index remained relatively constant at a mean value of 0.025 from May through mid-August; increased to a...
Virtual environments and simulations are being used increasingly to both visualize and understand data as well as to create scenarios for training and analysis purposes. In this paper, we are interested in the use of simulation and visualization of interactive virtual agents to create realistic motions for training scenarios. We...
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Ronald A Metoyer
Virtual environments and simulations are being used increasingly to
Sperm mobility is defined as the net movement of a sperm population against resistance. Previous research demonstrated that the cell-permeant Ca2+ indicator rhod-2 AM gave a fluorescent signal predominantly in the head region of fowl sperm that differed between sperm mobility phenotypes. This thesis served to explore the role of...
Equipment for strip-till planting is under development in wheat-fallow
rotations in the Columbia Basin of Oregon. This involves the
absence of tillage during the fallow season. At planting time, the
strip-till planter creates a narrow band into which the wheat seed is
placed. The area between the rows is undisturbed...
Several studies were conducted to determine the effect of weed
density on herbicide efficacy. Diuron [3-(3, 4- dichlorophenyl) -1, 1-
dimethylurea] was tested on various densities of Italian ryegrass
(Lolium multiflorum Lam. ) under greenhouse and field conditions.
Cycloate (S-ethyl N-ethylthiocyclohexanecarbamate) was tested on
green foxtail (Setaria viridis (L. )...
Malolactic fermentation (MLF) is an important step in the production of wines and is commonly performed in red or cool climate wines to reduce acidity. In this study the impact of MLF on red wine color and the ability of Oenococcus oeni to degrade compounds important to the development of...
The effects of alfaxalone (A-HPCD), propofol (P), ketamine-diazepam (KD) and tiletamine-zolazepam (TZ) administered IV in dogs on cardiovascular and respiratory systems, acid-base balance and electrolytes have been reported in the literature, but a study that compares IV TZ to the other induction protocols (IP) is needed. Six dogs enrolled in...
Fresh ripe, cantaloupes were processed into juice and
juice concentrate. Processing trials were conducted on
fresh and frozen fruits with and without rind. The effects
of maceration enzymes and fining agents on yield and quality
were investigated. Compositional measurement included
°Brix, pH, titratable acidity, formol values, ascorbic acid
content, total...
Thermal decomposition of several di-p-toluenesulfonylhydrazones
was studied. It was found that the carbene decomposition
of tetramethyl-1,3-cyclobutanedione, di-p-toluenesulfonylhydrazone
gave two products resulting from
rearrangement. One was identified as 2,5-dimethyl-1,3,4-hexatriene. A tentative structure for the second was
proposed. During the course of the study, a more convenient
procedure for thermal decompositions was...
This study examined the effects of pH, temperature,
washing, and post-hydration drying on germination of
Anisogramma anomala ascopores. Spores germinate most
readily in the temperature range of 5 to 15 degrees C, with
an optimal temperature of 10 degrees (1 sd=0.05). Growth
was best in the pH range of 5...
Different concentrations of various browning inhibitors and a firming agent were evaluated to prevent browning and softening of Bartlett, Bosc and Anjou pear slices during cold storage at 2-4°C. Browning inhibition effect of Semperfresh, Snow Fresh and cysteine were compared with that of 4-hexylresorcinol (4-HR). The effect of ripeness on...
Red radish anthocyanin extract (RAE) was investigated for coloring brined
cherries as an alternative to FD&C Red No. 40. Red radish (Raphanus sativus L.)
anthocyanins were extracted from liquid nitrogen powdered epidermal tissue using
acetone, partitioned with chloroform, and isolated using C-18 resin. The monomeric
anthocyanin content was determined by...
In recent years, considerable attention has been focused on the application of
orthogonal expansions to system analysis, parameter identification, model reduction
and control system design. However, little research has been done in applying their
useful properties to Power System analysis and control. This research attempts to
make some inroads in...
Landscape positions have been used to determine soil properties. My soil study in Monteverde on the Pacific slope of Costa Rica was designed to examine soil-landscape relationships for sites with various land use histories and management. Soil pits were dug at Nacimiento y Vida, Crandell, Curi-cancha, La Calandria, and Finca...
This thesis introduces a technique for approximating to a desired
degree of accuracy a linear parabolic equation of two spatial
dimensions with given initial data and prescribed boundary conditions.
The technique is generalized to non-linear parabolic equations.
It is stable for all mesh ratios, and it is second order accurate...
Two experiments involving 33 Holstein cows were conducted
for the primary purpose of studying the effects of flumethasone (a
synthetic glucocorticoid) on milk and milk constituent yields. The
secondary purpose was to compare udder health, reproductive performance,
and body weight changes of cows on flumethasone therapy.
Nine Holstein cows were...
Because of competition from abroad, the U. S. Steel
industry has begun research into the processes involved
with electric arc steelmaking. This paper addresses the
mathematical background of these furnaces and the electro-magneto-
hydrodynamical effects used to melt the large
quantities of steel. A classical approach to the
derivation of...
In this thesis, problems arising in pumping fluids
from the ground are treated. The mathematical theory is
derived for both the time dependent and independent cases.
A numerical method is developed to solve these problems.
Some particular examples are presented and computer plots
are drawn to illustrate the movement of...
Since the early twentieth century, manufacturers of toxic products have attempted
to discredit research linking their product with disease. At the same time they have manufactured their own science designed to minimize risks associated with their products. Much of this activity has been conducted by or through corporate attorneys, endeavors...