Current reforms emphasize the development of scientific literacy as the
principal goal of science education. The nature of science is considered a critical
component of scientific literacy and is assumed to be an important factor in decision
making on science and technology based issues. However, little research exists that
delineates...
This dissertation consists of a set of three manuscripts exploring features of effective professional development (PD) for science teacher educators. Literature about context-specific PD for science teacher educators is sparse. The first manuscript, a literature review, outlines theoretical lenses through which PD can be understood, the features of effective PD,...
Recent state and national standards have increased the interest in engineering at the K-12 level. Science standards, in particular, have begun to make the case for including engineering throughout the K-12 scope of study. Despite the increased attention to engineering, the characteristics and uniqueness of the field of engineering are...
The primary goal of the study was to determine if and
how baseball players discriminate the rotational direction
of an approaching pitch during the first 200 milliseconds
of the flight of the ball. In addition, college-level
baseball coaches were surveyed to assess the level of
agreement between coaches relative to...
Research has been completed that evaluates two methods for the
extraction of polynuclear aromatic hydrocarbons (PNAH) from water.
The two methods compared were EPA Method 610, a liquid-liquid
extraction method, and a method involving PNAH adsorption on
commercially available short C₁₈ bonded phase columns, Sep-Paks,
in series with glass microfiber...
As the volume of genetic sequence data increases due to improved sequencing techniques and increased interest, the computational tools available to analyze the data are becoming inadequate. This thesis seeks to improve a few of the computational methods available to access and analyze data in the genetic sequence databases. The...
Many miles of roads are built in the Pacific Northwest Forests to provide access for logging and fire protection. Logging roads often cross steep mountainous terrain. Logging roads and the associated cut and fill slopes represent a discontinuity in the natural stress state in the soil mantle. These conditions result...
The objective of this thesis is to provide an initial demonstration of the feasibility of constructing highly transparent active electronic devices. Such a demonstration is successfully achieved in the fabrication of ZnO-based thin film transistors (TFTs) exhibiting transparency greater than ~90% in the visible portion of the electromagnetic spectrum and...
The Salmonella/mammalian-microsome mutagenicity test was used to evaluate Senecio jacobaea (SJ) plant, Pyrrolizidine alkaloids (PA) and metabolites in goat milk, to evaluate response differences with microsomes from several animal species and to compare SJ plant responses to other plants. Bioassessment experiments were conducted to evaluate PA toxicity changes associated with...
The purpose of the study was to assess county extension agents'
knowledge of geotextiles; to determine their current level of
information and their location on an adoption-diffusion curve; and to
determine the agents' attitudes toward the potential use of
geotextiles in agriculture, specifically in soil erosion control.
A questionnaire was...
The present study aims to examine the influence of early science experiences in kindergarten on children's growth in science performance in elementary grades. The data for this study came from the Early Childhood Longitudinal Study Kindergarten cohort (ECLS-K). A model illustrating the relationships between the early learning experiences and later...
MicroRNAs are a highly conserved class of small endogenous RNA, about ~22nt in length, involved in post-transcriptional gene silencing and have prominent roles in disease and development. Though the process of microRNA discovery was once an arduous task, the advent of high throughput sequencing technology has resulted in novel microRNAs...
Uninhabited aerial vehicles, also called UAVs are currently controller by a combination of a human pilot at a remote location, and autopilot systems similar to those found on commercial aircraft. As UAVs transition from remote piloting to fully autonomous operation, control laws must be developed for the tasks to be...
This history concerns the scientific contributions of Charles
Babbage (1791-1871) to mathematics, to the invention of calculating
machines, and machine tools, to the development of scientific ideas
through a wide variety of scientific investigations and his involvement
in several different scientific reforms. Babbage considered himself
a philosopher in the broadest...
Rhizopogon is a hypogeous fungal genus that forms ectomycorrhizae
with genera of the Pinaceae. The greatest number and species of
Rhizopogon are found in coniferous forests of the Pacific Northwestern
United States, where members of the Pinaceae are also concentrated.
Rhizopogon spp. are host-specific primarily with Pinus spp. and
Pseudotsuga...
A literature review and a computer study are conducted to identify
the requirements of finite element programs for the specific use of discrete
analyses of reinforced soil structures. The utility of six commercially
available programs are appraised with respect to the identified
requirements. The results of the study are directed...
The concept of placing high strength linear reinforcements in a
soil backfill to produce a vertical retaining structure is a recent idea
that has been applied with success at a number of locations. Rational
procedures have been developed for the design of these structures
when the reinforcements consist of long...
Nonlinear large deflection finite element analyses of a fabric
reinforced embankment on muskeg were performed to predict fabric
tension and the effect of fabric stiffness on embankment deflections.
The predicted fabric tensions were compared with the results of a
sliding block analysis, and show this simple analysis requires further
correlation...
The effect of geotextile permeability on the stability of
rubble shore protection structures was investigated by conducting
large-scale wave tank tests on a revetment. Pore pressure within
the sandy gravel core of the revetment were measured in one phase
of the experiment, and stability of armor units on the structure...
The failure of cutbanks is a major problem encountered by those
who construct low-cost roads in naturally forested residual soils.
Attempts have been made to lessen the severity of failures by classifying
certain soil areas as to their susceptibility to failure, in
addition to bringing past design experience into play...
An evaluation of fabric reinforcement of the roadway
structure is made. The study includes a parametric analy
sis using layered elastic theory and a series of large
scale model tests.
The parametric. study analyzes the stresses and
strains of roadway structures with a fabric layer between
tna surface layer and...
The research undertaken consisted of the study of three topics
affecting the performance of asphalt concrete mixtures, that is, mixing
moisture, oxidative aging and higher tire pressures and axle loads.
This thesis presents the findings of the research comprising these
three topics.
In the first study, the effects of mixing...
The geologic processes at work in American Samoa have long been a point of scientific debate. Of its numerous volcanic formations, few breach sea level, leaving an enormous proportion of their mass unavailable to traditional observation. This study aims to describe the deep sea geomorphology of American Samoa through compilation,...
This dissertation focuses on the life of Dixy Lee Ray as it examines important developments in marine biology and biological oceanography during the mid twentieth century. In addition, Ray's key involvement in the public understanding of science movement of the 1950s and 1960s provides a larger social and cultural context...
A quantitative comparison was made of the incorporation of 14, C¹⁴ lipid compounds into Lee influenza virus. The compounds tested were either lipids reported to be present in the virus or precursors to virus lipid components. Infected chorioallantoic tissues were incubated in medium containing the C¹⁴ metabolites. The virus was...
This study was conducted to observe the manner in which three local
public interest organizations participated in a local, environmentallyoriented
decision process. The study period began in December, 1978,
with the passage of a revised solid waste ordinance (Ord. 78-102) for
the City of Corvallis, OR. The main forum for...
This research explores the consequences and effects for men
enrolled in introductory Women Studies courses at Oregon State
University. Men are enrolling in the feminist classroom in larger
numbers due to institutional changes allowing Women Studies to
provide credit for baccalaureate core curriculum. The intention of
this study is to...
Empowering pedagogy (also know as “transgressive,” “emancipatory,” or “democratic” forms of education) seeks to challenge the historically oppressive tendencies of traditional education. As a student of Social Justice and International Studies, I approach the topic of empowering pedagogy through a case study. My research explored this non-traditional educational philosophy and...
Old women face a unique set of obstacles in their
quest for empowerment. In this study the concept of
empowerment is explored by politicizing issues of personal
safety. The most significant factors that impede an old
woman's sense of safety and control include oppression,
primarily ageism and sexism, along with...
Since its introduction in the early 1990s, the quick growth of the World Wide Web
(WWW) traffic raises the question of whether past Local Area Network (LAN) packet
traces still reflect the current situation or whether they have become obsolete. For this
thesis, several LAN packet traces were obtained by...
The azalea lace bug (Stephanitis pyrioides Scott) is a recently detected invasive pest to the Pacific Northwest and has become a major concern in Oregon. It feeds on azaleas as well as rhododendrons causing stippling on the top side of leaves. The damage is aesthetically displeasing and affects plant vigor...
The increasingly corporatized and privatized public university has resulted in significant role changes for students and faculty. Among these changes includes the development of online education and its proliferation among various disciplines to not only increase educational access, but to sustain budgetary program needs. Such processes are occurring in women's...
This field investigation was designed to further
the understanding of the significant influence which
parent population density, as well as dispersion, have
on the dynamics of enclosed populations of the montane
vole, Microtus montanus (Peale). The study was conducted
in Klamath County, Oregon from June, 1963 to February,
1964. The...
Books and literature help children and young adults develop language, cognitive, and social skills. Additionally children's literature enables individuals to develop a deeper appreciation for their own, and others' cultures and histories. This thesis analyzes the young adult historical fiction series Dear America, published by Scholastic press, and examines how...
Research shows that women's lives are disproportionately impacted by the effects of climate change. While the topic of women is largely absent from climate discourse overall, the representations of women that occur reveal underlying structures of power rooted in imperialism and colonial dominance. This thesis presents an analysis of the...
Some elementary teachers want to be more child-centered in their
teaching. They are trying to consider the needs of the students
before the coverage of curriculum. Much of the inspiration for this
educational approach has come from the British primary schools.
The purpose of this study was to see if...
Traditional approaches to streaming H.264 video over a network typically rely on a single method of transport (i.e., reliable or unreliable) and/or use static values for parameters that can have a significant negative impact on the perceptual quality of the received video. This dissertation presents a dynamic method for wireless...
Within the U.S. there is a growing interest in the case of female adolescents being coerced into the sex industry (Bernstein, 2010; Estes & Weiner, 2001; Soderlund, 2010; Williams and Frederick, 2009). This interest, which emerged due to U.S. involvement in the international trafficking phenomena and grassroots organizing, has resulted...
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Janet Lee
Within the U.S. there is a growing interest in the case of female adolescents
Quantitative assessments of post-fire effects are key to improving our understanding of ecosystem resilience. While remote sensing technology has allowed us to assess post-fire landscape effects, we are often limited by the lack of information related to pre-fire forest attributes. As a result, our ability to interpret fire effects in...
Highway capacity has traditionally been treated as deterministic. In reality, however, capacity can vary from time to time and location to location due to inclement weather, various driving behavior, traffic incident, bottleneck and workzone. This thesis aims to characterize the stochastic variations of highway capacity, and explore its applications.
The...
There has been much discussion in the conservation and policy realms of COVID-19 as a zoonotic disease, or a disease transmitted from wildlife to humans. However, wildlife consumption in China is not only a potential source of disease but also a practice embedded in complex beliefs about health. This paper...
Three trends are occurring today in the United States which inspired this research. First, America is growing increasingly urbanized. Today, more Americans are living in cities than in rural environments, and this pattern is predicted to continue for the foreseeable future. Urban living has benefits, but there are also challenges...
Natural resource data are typically non-linear and complex, yet modeling methods often utilize statistical analysis techniques, such as regression, that are insufficient for use on such data. This research proposes an innovative modeling method based on pattern recognition techniques borrowed from the field of machine learning. These techniques make no...
Forest growth models in the Pacific Northwest are predominantly empirical. Predictions of yield under alternative silvicultural regimes cannot rely completely on field trials; yet empirical growth models are often inadequate for extrapolating untested regimes and genotypes. The limitations of current models include (1) long time-steps (e.g. 5-10 years); (2) insufficient...
The Klamath Basin of Oregon and California has been the scene of extensive ecosystem restoration activities in recent years. The need for restoration is based on changes in land use that have adversely affected water quality and wildlife habitat. Many different kinds of restoration projects are occurring at many different...
The purpose of this study was to develop a programmed learning
booklet concerned with the care of groups of young children. The
instructional material was designed to be used in homemaking and
occupational programs. The criteria for developing the program were
(a) that it be geared to the student with...
Aerobic heterotrophic bacteria associated with oyster larvae feed
algae Isochrysis galbana, Monochrysis lutheri and Pseudoisochrysis
paradoxa were isolated and enumerated. The bacterial numbers ranged
from 7.8x10³ to 3.9x10⁶ CFU per ml. The bacteria associated with
Pseudoisochrysis sp. were identified and the majority of isolates
belonged to genera Leucothrix (51%). Also...
Trimethylamine-N-oxide (TMA-0) reductase activity of resting cells
of Escherichia coli was inhibited by tetrasodium ethylenediaminetetraacetate
(Na₄EDTA), benzoic acid (BA), and methylparaben (MP). The 50% inhibitory
concentrations of Na₄EDTA, BA, and MP were 20.2, 1.2, and 32.4 mM,
respectively. BA at pH 6.5 or below most effectively inhibited the TMA-0
reductase....
Sterile fish muscle homogenate was prepared from the individually
line caught black rockfish (Sebastes melanops) and inoculated
with the pure culture of Pseudomonas putrefaciens strain 17. The
inoculated homogenate was incubated at 5°C and the growth and production
of volatile sulfur compounds determined by a combined gas-liquid
chromatography and mass...
A 140 bed community hospital was the setting where the development
and evaluation of a computer aided patient profile review system took
place. This clinically oriented system involved the review of patient's
drug regimen, diet, allergies, and laboratory tests for well documented
contraindications or interactions. The pharmacist was involved in...
This study was undertaken to determine if the structured observation of student teaching affects student teacher performance. A Structured Observation Scale (SOS), as an instrument for student teaching classroom observation, and a Satisfaction Scale (SS), to assess the satisfaction of cooperating teachers, student teachers, and university supervisors with the observation...
Evidence suggests that western juniper
(Juniperus occidentalis) in Central Oregon affects
understory production and composition. As trees
increase in size and density, understory production is
reduced and composition changes. This study was
designed to identify the relationship between
production and composition of understory vegetation
and various tree canopy sizes of...
In this dissertation, a series of studies in the field of terahertz (THz) science are presented, specifically using nonlinear THz spectroscopy. We exploit huge field enhancement and subwavelength confinement in plasmonic structures. There are three distinct projects which will be discussed: nonlinear THz spectroscopy using plasmonic induced transparency (PIT), THz-triggered...
Pacific shrimp (Pandalus jordani) was washed repeatedly and the
eluted bacteria were enumerated and identified. Selected isolates
were tested for their adhesive properties.
Washing reduced the microbial load by 3.84 to 42.04%. The bacteria
which most resisted wash-off were Staphylococcus and Pseudomonas
spp. The easiest to wash off was Flavobacterium...
Settlement of structures built on geologically recent compressible alluvium is a common cause of concern during design. Total settlement results from a combination of: 1) initial elastic settlement, 2) primary consolidation, and 3) secondary compression. The reliability of prediction of total settlement is affected by an understanding of these components...
The purpose of the study was to develop a resource guide
1. to introduce high school students to ways in which
intellectual development can be taught in early childhood
education programs.
2. to give early childhood educators additional ways of
teaching intellectual concepts to preschool children.
To achieve this purpose,...
Considerable research has been done on women and leadership styles, and while most have found very little to no difference in leadership style between men and women, there has been conflict with individual gender roles and organizational roles (Eagly & Johnson, 1990; Eddy & Cox, 2008; Kanter, 1997). These studies...
STATEMENT OF THE PROBLEM
Document-based educational information systems require systematic
acquisition efforts that must be conscientiously undertaken to build an
information system and to keep it current. These acquisition efforts
can be influenced by several variables. The major thrust of this
research was to investigate one of these variables, namely...
In this work sample, a student teacher implemented ESOL standards and
strategies on a unit covering chemical compositions in a high school chemistry
classroom. The ELD program at this high school has two types of ELD classes. ELD 1/2
classes have a grammar-based curriculum focused on the English Language, while...
The Purpose of the Study: The major purpose of this study was to determine if there were differences among the opinions of participating employers, previous participating employers, and non- participating employers concerning cooperative vocational education,. The hypothesis that there is no significant difference among the mean scores for the three...
Purpose of the Study The purpose of the study was to determine if differences existed in commitment to teacher collective bargaining associations among vocational teachers. The objectives were: (1) to determine the degree of commitment among secondary vocational teachers to the teachers' collective bargaining association; and (2) to determine the...
Vegetation diversity in the Wyoming big sagebrush/Thurber needlegrass (Artemisia tridentata Nutt. ssp. wyomingensis Beetle & Young/Achnatherum thurberianum (Piper) Barkworth. syn. Stipa thurberiana Piper) plant association was studied across a condition class gradient in southeastern Oregon. All observable vascular plant species were counted during 6 seasons and 2 years and diversity...
Approximately 600,000 individuals will be eventually released from the prison system and millions will be released from jails across the United States each year (Mukamal et al., 2015). Some of these individuals will make their way to a local community college to make a better life for themselves. There is...
Published March 1979. 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
Thermal distress in asphalt concrete pavements is a widespread problem around
the world. Thermal cracking can be divided into two modes of distress: low
temperature cracking and thermal fatigue cracking. Low temperature cracking results
from extremely cold temperatures; thermal fatigue cracking results from daily
temperature cycles.
Low temperature cracking is...
Short-term freeway traffic speed prediction is essential to improving mobility and safety. It has been a challenging, yet unresolved issue. Traffic speed prediction can be applied to enhance the intelligent freeway traffic management and control for applications as operational and regulation planning. For example, with more reliable traffic speed prediction,...
Hydraulic dredging is and most certainly will remain a primary
means of maintaining and improving ship channels and for land
reclamation in near-shore water. The study of which this thesis
describes a part is intended to develop a method of predetermining the
immediate disposition of sand spoils from hydraulic dredging...
This thesis provides a comparison of advanced econometric frameworks to account for unobserved factors in crash reported data (also referred to as unobserved heterogeneity) while identifying contributing factors by roadway classification for heavy vehicle injury severity and crash rates. The presented thesis provides two manuscripts that expand the literature regarding...
Moisture damage has long been recognized as one of the most
critical factors influencing the performance of asphalt concrete (AC)
pavements. This moistureinduced damage occurs from either the
physical separation of the asphalt film from the aggregate or the
softening of the asphalt binder within the AC mixture in the...
Pedestrian distraction at roadway crossings has been correlated with a higher risk of pedestrian-vehicle collisions due to the pedestrian's cognitive, visual, and motor attention being drawn to a wide variety of secondary tasks.
This study is different from previous field studies of pedestrian midblock crossings in that the geometric layout...
Seedlings of Pseudotsuga menziesii (Mirb.) Franco and Betula papyrifera Marsh. were grown in the greenhouse in monoculture and dual culture in soils collected from a young mixed species plantation in the southern interior of British Columbia. The objectives of the study were (i) to evaluate the ability of P. menziesii...
Background: Although both transgender adults and adults living with disabilities struggle to access healthcare, both populations are underserved and understudied. Existing research either examines transgender adults and adults with disabilities as separate groups or frames disability as a health outcome a transgender person may experience. Health care utilization and health...
Low temperature cracking is attributed to tensile stresses induced in an
asphalt concrete pavement that develop when the pavement is subjected to a cold
temperature. Cracking results in poor ride quality and a reduction in service life of
the pavement. Low temperature cracking has been predicted by regression
equations, mechanistic...
During a 13-month period starting in October of 1976, adult
male rough-skinned newts (Taricha granulosa) were collected periodically
to study seasonal changes in reproductive status. Plasma
androgen concentration, measured by radioimmunoassay, is elevated
during autumn and spring (about 50 ng/ml). Winter and summer levels
are considerably lower (less than 10...
A. W. N. Pugin was a driving force in the Gothic Revival movement in England during the first half of the nineteenth century. He was an architect and a writer who expounded on the virtues of reviving Gothic architecture, not only for its reflection of the sacred mystery of ancient...
A qualitative evaluation was made of the adherence between
borosilicate glass and the ceramics, steatite and alumina. Three
basic adherence studies were performed.
(1) A comparison between the x-ray diffraction patterns of
the ceramic and the fused glass-ceramic powder mixture was made
to determine if any new compounds were formed...
The metabolism of pyrrolizidine alkaloids and other
drugs was studied with regard to nutritional status and
species differences. Pyrrolizidine alkaloids which are biotransformed
to severely toxic metabolites were isolated
from tansy ragwort (Senecio jacobaea). Semi-purified alkaloid
crystals containing five alkaloids (senecionine, seneciophylline,
jacobine, jacoline, and jacozine) were prepared
and found...
The effect of gadolinia particles on the assembly criticality
of a light water reactor was investigated using two 2-group
models. The particle effect was calculated by comparing the
criticalities of two fuel assemblies, each containing one
gadolinia-poisoned rod. For purposes of comparison, both rods
contained an equal quantity of gadolinia,...
The mathematical and physical connections between three different ways of quantifying linear predictability in geophysical fluid systems are studied in a series of analytical and numerical models. Normal modes, as they are traditionally formulated in the instabilities theories of geophysical fluid dynamics, characterize the asymptotic development of disturbances to stationary...
High rates and high costs of adolescent pregnancy and school dropout have resulted in the development of many prevention programs; however, little is known about the long-range effectiveness of efforts. Empirical research is needed to document behavioral outcomes over extended periods of time. I interviewed eight young white women who...
Porchless Staircase is a collection of poetry investigating a wide range of themes: consumerism, death, sexuality, alcoholism, religion, writing, family, and, most frequently, isolation. At times toying with notions of the sublime and surrealism, the confessional and the imagistic, these poems vary in form, process, and style, but are loosely...
The purpose of this study was to assess changes in attitudes
toward behavioral understanding, marital role expectations, and self
concept in a selected group of high school girls. These subjects
were enrolled in a one semester child development course which
included observation and participation experiences with young children.
The subjects...