Euphausiids constituted the major food of five co-occuring species of rockfishes (Sebastes spp.). Copepods, decapods, cephalopods, amphipods, fishes and other pelagic prey were also consumed but were
less important to the overall diet. Two species, S. flavidus and S. diploproa, were relatively euryphagous, utilizing a high number of prey taxa....
Most recent research on stream amphibians in the Pacific Northwest has focused on associations with reach-level or stand-level environmental features. Little is known about landscape-level distributions of these species or landscape-level aspects of their life-histories. I used a watershed-wide sample and logistic regression to develop models and maps of probability...
An important problem in molecular biology is to predict the secondary
structure of proteins from their primary structure. The primary structure of a
protein is the sequence of amino acid residues. The secondary structure is an
abstract description of the shape of the folded protein, with regions identified
as alpha...
With declining populations and low calf recruitment in northeastern Oregon, much interest has been generated to study the survival rates and causes of mortality of Rocky Mountain elk (Cervus elaphus nelsoni). I investigated the causes of elk calf mortality and the effects of predation risk on birth-site selection by cow...
This paper deals with finite abstract Witt rings in the case where
-1 = 1 in the square class group.
The results also apply to Witt rings
of quadratic forms over fields where √-1
is in the field.
The concept
of relative rigidity is studied in finite abstract Witt rings...
Past disasters such as mercury poisoning in Minimata, and new problems such as tributyltin impacts on shellfish have maintained public concern about problems caused by chronic discharges of hazardous materials into marine waters (Clark, 1986; U.S. Congress, 1987). However, hazardous chemical spills in coastal waters typically escape public attention. Unlike...
A publication containing advice on a wide range of gardening topics, including composting, container gardens, fall/winter gardens, fertilizing, insect pests, plant diseases, planting guidelines, raised beds, site selection, slugs, soil improvement, tilling, warm-season crops, watering, and weeds. Includes regional tips for various parts of Oregon.
The vast majority of U.S. farm bill spending goes to nutrition assistance, on the one hand, and farm safety net programs, on the other. Although these programs are a major part of federal government expenditures, controversial and governed by a common bill, they have rarely been quantitatively analyzed together. To...
The relationship between population and residential property taxes
is not well understood. This study is an attempt to discern the relationship.
The basic questions examined are: How does population affect tax
bills? What are the short-run and long-run relationships between population and taxes? What reasons lie behind the answers to...
This study was conducted to investigate the accumulation of dietary polychlorinated biphenyls (PCB's) by a Mt. Shasta strain of rainbow trout (Salmo gairdneri). A commercial mixture of PCB's (Aroclor 1254) was added to the diet at a level of 15 ppm on a dry weight basis. Accumulation of PCB's was...
A programming paradigm can be defined as a model or an approach employed in solving a problem. The results of the research described in this document demonstrate that it is possible to unite several different programming paradigms into a single linguistic framework. The imperative, procedural, applicative, lambda-free, relational, logic and...
Rural communities will continue to be disproportionately shocked by economic fluctuations. Market forces are likely to lead to the decline of many rural communities and they will need to be economically resilient to survive. This thesis draws on several social sciences and the natural sciences to develop ideas that communities...
Each NWR within the U.S. Fish and Wildlife Service (FWS) National Wildlife Refuge System (NWRS) provides landscapes that contribute to conservation of wildlife and the habitats they depend on at local, regional, and national levels. The Integrated Pest Management Plan (IPMP) for a given refuge is a guide to how...
The reaction of several primary amines with nitrite was investigated
with regard to the formation of N-nitrosamines. When reacted
in a low moisture system at 160°C with a 1:2 molar ratio of amine to
sodium nitrite, various primary amine hydrochloride salts were found
to give rise to heterocyclic nitrosamines. The...
Organoleptically, flavored yogurts appear to contain lower
levels of acetaldehyde than plain yogurt. This study was undertaken
to seek the reasons for this phenomenon by focusing on the analyses
of acetaldehyde production by yogurt culture bacteria in yogurt base
containing added sucrose and by performing other analyses such as
the...
The main objective of this research was to determine the professional
in-service development needs of fourth, fifth, and sixth grade
teachers in the metropolitan school districts of Portland and Seattle.
The primary objectives for conducting this research investigation were
as follows:
1. To determine the professional in-service development needs
of...
Provides information about complexity of watersheds. Outlines ways to form partnerships, to develop strategies for enhancing watershed resources, and to implement enhancement projects.
Birds affected the community structure of an Oregon rocky shore by
preying upon mussels (Mytilus spp.) and limpets (Collisella spp.). The
impact of such predation is potentially great, as mussels are the
competitively dominant mid-intertidal space-occupiers, and limpets are
important herbivores in this community.
Prey selection by birds reflects differences...
The objectives of this dissertation were to describe the complex oceanographic conditions around the Galápagos Archipelago (eastern equatorial Pacific), their seasonal variability, and their effects on patterns of cetacean occurrence. The physical and ecological factors leading to a plume of high phytoplankton biomass in the wake of the Galápagos were...
A hydrodynamic model incorporating a self‐consistent treatment of ocean self‐attraction and loading (SAL), and a physically based parameterization of internal tide (IT) drag, is used to assess how accurately barotropic tides can be modeled without benefit of data, and to explore tidal energetics in the last glacial maximum (LGM). M2...
In an effort to identify seasonal distribution patterns and habitat requirements of coastal cutthroat trout Oncorhynchus clarki clarki, movement of tagged and marked individuals (35 radio-tagged, 753 PIT-tagged, and 5,322 fin-clipped) was monitored over a 14-month period in an isolated watershed in southwestern Oregon. Emigration out of the basin was...
The purpose of this study is to illuminate the presence
and rhetorical effect of anecdotes in President Clinton's
major health care address. It is the health care debate that
shows most clearly how Clinton tries to direct a multi-level
campaign that attempts to identify his interests (passage of
the Health...
Sufficiently large lake loads provide a means of probing rheological stratification of the crust and upper mantle. Lake Minchin was the largest of the late Pleistocene pluvial lakes in the central Andes. Prominent shorelines, which formed during temporary still‐stands in the climatically driven lake level history, preserve records of lateral...
California's Central Valley agricultural landscapes provide several important wintering regions for Pacific Flyway sandhill crane (Grus canadensis) populations; however, the value of those regions is being compromised by urban expansion, other developments, and conversions to incompatible crop types. Greater (G. c. tabida) and lesser sandhill cranes (G. c. canadensis) both...
A considerable amount of research and literature exists that attempt to explain the policymaking processes of central banks and, in particular, the Federal Reserve Bank (FRB). As with those studies, the purpose of this study is to explain FRB policymaking in order to understand FRB policy shifts during financial crises....
Changes in federal forest management, enactment of environmental policies, recessions and a shift to a global economy dramatically impacted counties between the 1980s and 1990s. In the 1990s, counties began experiencing a shift away from traditional natural resource extraction activities – amidst changing demographics resulting from rural restructuring taking place...
Most research on U.S. hunger and food insecurity is at the household level, where it occurs. Because policy to address food insecurity is created and implemented at the national and state level, hunger research at the state level provides important contextual information. By including weather data with state level economic...
Reprinted March 1977. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
I present a new heuristic search approach to compute approximate answers for the probability query in belief nets. This approach can compute the 'best' bounds for a query in a period of any given time (if time permitted, it will get an exact value). It inherits the essence of Symbolic...
This report summarizes the results of a field study of a population
of the Pacific mountain beaver, Aplodontia rufa pacifica, from
August 1965 through August 1967. The study site consisted of a 13. 5-
acre grid on a logged over area in the Coast Range Mountains of
Benton County, Oregon....
Body size explains much of the interspecific variation in the physiology, behavior, and morphology of birds, such as metabolic rate, diet selection, intake rate, gut size, and bill size. Based on mass-specific metabolic requirements and relative energetic costs of activities, being a certain body size has both advantages and disadvantages....
The lack of cost-effective, reliable sampling methods for many wetland
characteristics hinders efforts to describe the structural and functional
properties of wetlands. This study evaluated techniques for sampling the
subsurface hydrology and invertebrates of freshwater wetlands. The depth of
rusting on mild steel rods was compared with water well measurements...
The widespread introduction of trout to naturally fishless mountain lakes in the western United States has been accompanied by little research. The ecological role of trout populations occurring in 91 lakes of the central Selway Bitterroot Wilderness, Idaho, was examined with respect to 1) the sampling variability of biological and...
Hardrock mining is associated with severe environmental and economic costs. Of particular concern is acid mine drainage which has contaminated several thousand kilometers of streams across the United States representing a formidable danger to watershed health. Given the high risks of this activity, ensuring high regulatory standards may be an...
State parks in Oregon provide important sites for visitor recreation and natural resource education. With the increasing number of visitors to Oregon coastal parks, tide pools and beach areas, there is growing need for site-specific marine education to enhance stewardship, interpretation and safety knowledge. The Oregon Sea Grant Program and...
Lycopodium alkaloids have generated enormous amounts of interest from the scientific community, both as synthetic targets and for their medicinal properties. Herein is described work towards a unifying approach to large segments of the Lycopodium family. An organocatalyzed intramolecular heteroatom Michael reaction method, for the construction of piperidine and piperizine...
Northern sea lions (Eumetopias lubatus) were studied at three sites (Rogue Reef, Oregon, Marmot Island, Alaska, and T.Ugamak Island,
Alaska) during the 1982, 1983, 1985, and 1986 breeding seasons. Data were collected on female activity budgets, attendance patterns, births, copulations, population structure, and patterns of seasonal and daily abundance. Females...
Summary plankton and whole RA species collection and processing data for all samples other then OTB,MT,VM,EMPS. Only smooth data, samples from dip net, or others given from other locations. Date of coverage: 1965-1971.
Date of coverage: 1965-1972. Sample numbers, weights of ashed tested samples, dates samples went into detector. End of book has Atomic absorption record for Zn.
Sample numbers, weights of ashed tested samples, dates samples went into detector. End of book has Atomic absorption record for Mn. Date of coverage: 1966.
The free fatty acids of Cheddar cheese are important components
in the over-all flavor and aroma of the cheese. Although the
more volatile fatty acids probably contribute most, there is reason
to believe that the higher fatty acids may contribute, to some extent,
in imparting typical flavor characteristics. Before the...
The goals of this dissertation are centered on understanding changes in Earth surface and climate systems through the use of geologic proxies as records of past changes in these systems. Specifically, this dissertation (1) establishes a new chronology for retreat of the Ross Sea sector of the West Antarctic Ice...
During the course of ripening, Cheddar cheese frequently develops
a flavor defect described as fruity. Recent work has indicated
that the use of certain starter cultures ultimately results in the
development of the defect as the cheese ages. The flavor compounds
responsible for the defect, however, have not been elaborated....
The statistical correlations between habitual diet and plasma
risk factors for coronary heart disease CHD were analyzed using
multiple regression. Thirty-one male subjects between 30-56 years
kept complete dietary records for 7 days. Daily means of nutrient
consumption were calculated using a computerized data base.
Fourteen independent variables (total kilocalories,...
This dissertation centers on development of two web-based, in class learning tools, the AIChE Concept Warehouse (CW) and the Web-based Interactive Science and Engineering Learning Tool (WISE), and describes the investigation of student learning through their use. The intent of these tools is to promote deeper conceptual understanding in students...
The purpose of this study was to investigate the development of an interactive
aquarium design motivated by the employment of an innovative technology used in
scientific research. The study was informed by research on free-choice learning
describing the effects of interactive devices on visitor learning, engagement, and
attitudes. The researcher...
The Oregon chub. Oregonichthys crameri. one of
Oregon's endemic freshwater fishes. is restricted to the
Willamette and Umpqua rivers and their tributaries.
Specimens from the two rivers have traditionally been
considered the same species. The goal of this study was to
re-examine that assumption and determine if the Willamette
Oregon...
Data from the southern Cascade Mountains of
Oregon has been collected for application in computer
analysis of snowfields. Vegetation type, canopy
cover, slope, aspect, insolation, and snowfield
ground truth delineation are given consideration.
In addition, a procedure for transferral of data
onto Landsat imagery was derived.
Full Text:
EXTENT; SOUTHERN CASCADE MOUNTAINS, OREGON
by
DAVID BILL PARKER
A RESE;RCH PAPER
suiitted to
THE
The three important methods of approximation; interpolation,
least- squares, and Chebyshev, are extended into bivariate approximations.
A method of obtaining polynomial approximations for very
general classes of bivariate samples is developed. Bivariate least -
square approximations are reviewed and a method of developing bibariate
orthogonal sequence is derived. A method...
We survey the use of genetic algorithms in function optimization. We find that there are two distinct camps. Holland's camp seems to be interested in artificial intelligence uses of genetic algorithms and seems to have made only a few attempts at function optimization. Rechenberg's camp has concentrated on the optimization...
Extensive use of wilderness campsites has caused resource deterioration in numerous backcountry locations. Resource managers are responsible for maintaining natural wilderness-like conditions in these areas and providing opportunities for the public to use and enjoy them. This requires that realistic standards for resource impacts be determined and that publicly supported...
Hayes, in his Naive Physics Manifesto, identified two alternate ontologies for reasoning about liquids, an ontology based on the notion of a contained substance and one based on the notion of a molecular collection. Qualitative Process theory, proposed by Forbus, lends itself easily to encoding the contained substance ontology. It...
This thesis presents an examination of the nearshore wave bottom boundary layer
under conditions of significant sediment response. Using both field observations and
simple models, the response of the bottom boundary layer to random waves is shown to
have a complex behavior. First, the linearized wave bottom boundary layer governing...
Excavations performed at the historic Smith House (ORYA3) located in
Dayton, Yamhill County, Oregon, recovered a large collection of artifacts. Categories
of artifacts previously analyzed include flat glass, nails, glass containers, ceramic
hollowware and flatware, brick, bone, metal containers, illumination devices,
currency, footwear, tobacco, and lead balls, shot, and cartridge...
The Wetland Reserve Program (WRP) is one conservation tool that mitigates national wetland loss and a primary goal for the program includes optimizing wildlife habitat by restoring wetland functions and values. Few studies have evaluated the WRP, which limits our understanding of its impact on wildlife populations. I assessed the...
:
________________________________________________________________________
Bruce D. Dugger
Abstract
The Wetland Reserve Program (WRP) is one conservation tool that
Wildfire management has grown increasingly complex in recent years,
particularly in the West and in the Wildland-Urban Interface (WUI) where a steady
population growth has resulted in greater risk to people and property. Recent trends
suggest the process of recovering from large fires (>100,000 acres) will become
increasingly important to...
Field survivals of strawberry (Fragaria x ananassa) runner plants
dug from December to April in both 1979 and 1980 were above 9C% when
planted about May 1. When plants from the same digging dates were
planted in early June, survival of March-dug 'Olympus' declined to
88% and survival of late-April-dug...
This paper describes a study of two-phase gas-liquid vertical
annular climbing film flow. Using a high speed Fastax movie camera,
motion was slowed sufficiently to facilitate detailed analysis of the
climbing film structure, based on single frame projections. The
dynamic characteristics of the liquid film could likewise be obtained,
though...
If informed and rational judgments are to be made concerning
proposed large scale interbasin water diversions, it is imperative
that competent positive analysis be undertaken by scientists of relevant
disciplines. It is the primary purpose of this thesis to pull together
into a single interrelated package, the economic theory needed...
The study of aldehydes in diesel exhaust is important because
of their relationship to diesel odor, to air pollution, and to the development
of a theory of combustion. Therefore, a study is made
of the low order aliphatic aldehydes using gas chromatography in
conjunction with standard wet chemical tests.
The...
Dental disease is a very prevalent and costly disease in which the symptoms, not the disease, are currently being treated. The disease is caused by pathogenic oral bacteria, many of which are a part of the Mutans Streptococci. The objective of this thesis was to find a natural substance that...
Gradients of physical disturbance are central to
theories of community organization yet rarely are studies
performed in which physical factors are experimentally
manipulated. Pothole tidepool algal communities exhibit
distinct zonation patterns from top to bottom that result
from scouring by rocks and other debris in the pools.
Scouring is easily...
Ninety-one species of birds were surveyed in grass/forb, early and late shrub/sapling, pole, and medium sawtimber stages of young-growth Douglas-fir in northwestern California; patterns of bird distribution and abundance were related to habitat conditions and even-age silvicultural treatments. Seven species (band-tailed pigeon, western wood pewee, dusky flycatcher, western bluebird, fox...
In 2016, the state of Oregon passed landmark legislation that doubles the state’s Renewable Portfolio Standard and eliminates the use of coal-fired electricity for the state’s two major electric utilities by 2030. The legislation was the first of its kind in the country to outright ban the use of a...
A water-soluble complex containing ergosterol together with
a component of yeast has been isolated. The complex can be isolated
from commercial yeast extract to which ergosterol has been
added or directly from whole yeast cells. The complexing agent
from yeast extract is also capable of solubilizing cholesterol and
a long...
The Community Action Partnership of Oregon (CAPO) approached Oregon State University to assist in developing statewide indicators which help local agencies better utilize data for continuous improvement. The project was expanded to include Washington and Idaho. This report summarizes the project's findings.
This thesis focuses on the nesting ecology and marine space use of Marbled Murrelets (Brachyramphus marmoratus) during the 2007 and 2008 nesting seasons in and around Port Snettisham, a remote mainland fjord in Southeast Alaska. Marbled Murrelets (murrelets) are a declining species throughout most of their range, and their conservation...
Cross-seasonal effects, where conditions in one season can have consequences in a following season, can have population-level implications for migratory species. To assess the presence of cross-seasonal effects on a migratory dabbling duck population, we examined the relative importance of habitat conditions in multiple seasons on the subsequent productivity of...