At the university level, introductory science courses usually have high student to teacher ratios which increases the challenge to meaningfully connect with students. Various curricula have been developed in physics education to actively engage students in learning through social interactions with peers and instructors in class. This learning environment demands...
Onsite wastewater treatment systems (OWTS; septic systems, compost toilets, etc.) used to treat wastewater in rural areas have the potential to contaminate groundwater (that is used as a water source) with nitrate. There have been decades of scientific and political conflicts concerning the issue of nitrate from OWTS (NOWTS, pronounced...
Using research on student motivation as well as Project-Based Learning as a theoretical framework, this thesis outlines the creation process for a set of curricula. These curricula were designed to address topics of markedly low student motivation in the first term of an introductory physics with calculus course (PH 211)...
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Dedra Demaree
Using research on student motivation as well as Project-Based
Learning as a
An investigation was made to determine teacher facilitation techniques in large lecture physics classrooms that foster small group discussion. Video recordings of an introductory calculus-based physics class were taken for the 2008-2009 academic year at Oregon State University. These videos were analyzed to determine student participation in small group discussion...
This dissertation explores the engineering of carbon nanotube electronic devices using atomic force microscopy (AFM) based techniques. A possible application for such devices is an electronic interface with individual biological molecules. This single molecule biosensing application is explored both experimentally and with computational modeling.
Scanning probe microscopy techniques, such as...
The primary objective of Leg 138 was to provide detailed information about the ocean's response to global climate change
during the Neogene. Two north south transects were drilled (95° and 110°W) within the region of equatorial divergence driven
upwelling (and thus high accumulation rates and resolution) and spanning the major...
Over the past twenty years, the national three-year graduation rate for community college students has ranged from 44% to roughly 31% in 2013 (NCES, 2013). As a way to address such low graduation rates, colleges have implemented a myriad of services and programs (i.e., tutoring, mentoring, etc.). Another intervention is...
In regions where soil temperatures limit plant growth, artificial
soil warming may be an economically feasible practice. This hypothesis
was evaluated in a soil warming experiment near Corvallis, Oregon.
This experiment was prompted by the observation that multiple
use of waste heat discharged in the condenser cooling water of thermal...
Oregon is one of several states to implement a new and innovative minimum wage policy. The Oregon policy defines three regions with each having a separate initial minimum wage and a different set of incremental increases over the next seven years. This paper explores how this policy change may impact...
Involvement has been defined and researched by many student affairs professionals and theorists over the past 40 plus years. While many studies have researched the relationship between involvement and a student's academic success, little research has been done that explores what involvement means to them, and the motivations and factors...
The purpose of this study is to examine the role of a Filipino American college student organization at a Predominantly White Institution, and uncover elements of the organization that influence or limit the development of critical consciousness of its members. This study focuses on the aspect of critical consciousness that...
This literature seeks to broadly examine historical literature and information pertaining to developmental education in the community colleges and its relationship with the college success. Contextually, the review will examine factors that affect student perception to academic success while being required to participate in remedial course work. Although issues surrounding...
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Larry D. Roper
This literature review seeks to broadly examine historical literature and
Freeze/thaw cycles are numerous in agricultural soils of the Pacific Northwest. Potential loss of soil by erosion is high whenever a soil thaws from the surface creating a saturated soil overlying an impermeable frozen layer. Field studies were conducted to investigate the effect of surface residue on soil freezing. Residue...
The continuum theory provides a framework in which the growth
of a plant root as a dynamic process involving interactions among
transport of water and solute, cell division, and the subsequent cell
elongation can be described. A plant root is modeled as a one-dimensional,
multi-phase, mathematical continuum. The network of...
The purpose of this study was to determine the concerns of past participants of the Summer Agriculture Institute regarding the use of agriculture as a context for teaching and to determine how they implement curriculum integration. The study used the Concerns-Based Adoption Model as a theoretical framework, which resulted in...
To facilitate the selection of drill sites for Leg 138, a site survey
program was conducted on board the Scripps Institution of
Oceanography's research vessel Thomas Washington (Cruise Venture
1). During this cruise, which departed San Diego on 30 August 1989
and arrived in Manzanillo, Mexico, on 4 October 1989,...
Multiple use of waste heat from power plants may become an
important consideration in the development, siting, and certification
of these plants. A multiple use system of components that can
beneficially utilize waste heat may include home heating and cooling,
greenhouses, animal enclosures, open basins for single cell protein
production...
The purpose of this study was to develop a valid and reliable
instrument to measure the organizational climate of the community
college as perceived by community college administrators, faculty, and
classified staff.
There were three phases in this study. The first was to develop a
pool of test items based...
Forest soils with low bulk densities are often considered less
susceptible to compaction than soils with higher bulk densities. The
objective of this study was to determine if soil strength controlled the
compression of soils with low bulk density. Four soils were selected
for this evaluation. Three of these were...
Candidatus Pelagibacter ubique is the first cultured representative of the SAR11 clade, a clade that is found throughout the oceans and accounts for approximately 25% of all bacterial cells [1]. It has a streamlined genome that is the smallest of any known free-living organism. In this study the complete genome...
Globally intermittent turbulence is characterized by sudden switching from significant turbulence to weak turbulence and back on time scales ranging from seconds to tens of minutes as opposed to microscale intermittency, which is due to organization of small scale gradients by individual eddies on scales as small as the Kolmogorov...
This qualitative study informed by a phenomenological approach explored the experiences of students when deciding to disclose bias-related incidents. Through an individual interview and follow-up focus group, eight participants shared their experience with bias-related incidents, decision to disclose or not to disclose, and perception of university resources. Five themes emerged...
The influence of soil moisture stress and soil temperature on
transpiration has never been determined explicitly. This relationship
has been neglected mainly because of the lack of a satisfactory method
to control soil moisture stress.
A technique was developed to evaluate this relationship by
controlling soil moisture stress with osmotic...
A two-scale approach for the turbulent mixing of momentum in an unstable stratified boundary layer is proposed in an attempt to eliminate existing inconsistencies between parameterized mixing of heat and momentum. The parameterization of the large eddy stress is suitable for simple boundary layer models where computational efficiency is important....
This study concentrates on analysis of LongEZ aircraft data taken offshore of the Atlantic Coast of the United States. Due to the land structure of the region, it was possible to isolate the effect of narrow land on air as it flows offshore. The narrow land (Outer Banks) separates inland...
The purpose of this study was to determine if there were common
factors influencing student decisions to terminate course work at the
College of San Mateo, San Mateo, California.
The following six null hypotheses were tested:
1. There will be no significant difference in responses
among those enrolled in transfer...
The proceeding work is a culminating representation of the practitioner competencies for the field of student affairs. It is a mixed-medium arts-based zine.
As student affairs practitioners, we are uniquely positioned to influence and impact the students we serve. And the ways in which we influence and impact our students...
The goal of this research project is to better understand the impacts and
difficulties of offering gender-focused social programs through micro-lending banks.
Previous research has demonstrated not only the importance of micro-lending, and the
benefits of lending to women, but also the value of offering social programs specifically
designed to...
For a certain class of Z²-actions, we provide a proof of a conjecture that the ratio of the Perron eigenvalues of the transfer matrices of the free boundary restrictions converge to the entropy of that action. Also, a novel method for computing the entropy of Z²-actions is conjectured.
A simple matrix method for the analysis of protein circular dichroism (CD) spectra is presented and used to compute the secondary structure of globular proteins in their native and denatured states. The method uses singular value decomposition and generalized inverse algorithms, and a basis set of CD spectra for proteins...
Two problems involving high-resolution reconstruction from nonuniformly sampled data in x-ray computed tomography are addressed. A technique based on the theorem for sampling on unions of shifted lattices is introduced which exploits the symmetry property in two-dimensional fan beam computed tomography and permits the reconstruction of images with twice the...
An information processing model of the problem-solving
performance of mechanical designers is presented for four design
tasks: conceptual assembly design, layout component design, detail
component design, and catalog selection. These tasks are organized
into six kinds of segments called episodes, which describe the goal
structure of the designer while performing...
This study investigates how teachers develop and extend their understanding and knowledge of teaching and learning with digital technologies in a primarily online Master of Science program. The investigation focuses on exploring the relationship between developing an online community of learners and the construction of technological pedagogical and content knowledge...
Warm, high pressure systems are measured from a weather station on a high elevation peak in the Oregon Coast range during the winter months. Temperature observations on Mary’s Peak show abnormally warm air in relation to the surrounding areas. The goal of this study was to characterize the frequency and...
Since 1935, France has introduced a set of strict national wine rules and regulations, the Appellation d’Origine Contrôlée (AOC). The AOC limits fraud and oversees quality control by basing the rules on terroir. High quality from terroir comes has both physical and cultural factors. Before 1935, France produced a variety...
The stability of steady-state solutions of the equations governing two-dimensional,
homogeneous, incompressible fluid flow are analyzed in the context
of shear-flow in a channel. Both the linear and nonlinear theories are
reviewed and compared. In proving nonlinear stability of an equilibrium,
emphasis is placed on using the stability algorithm developed...
Prior research has noted the changing demographics of higher education since the Civil Rights Movement and the expanded need for multicultural education. Armando Hernandez Morales (2003) wrote that, “A multiculturally competent person is aware of and knowledgeable about cultural differences, their own cultural identity, and the history and contemporary struggles...
Leaf elongation is a major indicator of plant growth. It is
controlled by complex interactions of many factors including light
intensity, photoperiod, water availability, atmospheric conditions,
and plant water stress. In this study, the response of leaf elongation
to length of photoperiod and to plant water stress as indicated by...
Post-secondary education institutions across the United States are increasingly allocating resources to promote international education exchange programs as a pedagogical praxis to develop students into global citizens. Underlying such notions of global citizenship is the assumption that students will also develop a stronger post-national or cosmopolitan identity as a result...
Rates of germination and emergence of corn were measured as
influenced by soil physical parameters using blotter paper and a sandy
loam soil as growth media. The corn seeds used were a hybrid of
Funk's (DJ7xLH93).
Experimental conditions were soil temperature of 20°C, 25°C,
30°C, and 35°C, soil water potential...
This case study of leadership in crisis at Meadow View
Community College (fictitious name) was undertaken to add to
the practical and theoretical knowledge and understanding of
presidential leadership issues that actually occur in
American community colleges. The college under study
one of nearly one-third of the community colleges in...
The purpose of this study was to use computer analysis of soil and rainfall data to predict the possible occurrence of soil erosion in Central Tunisia. Analysis was done with the program OR-NATURE (M.Ungs et al, 1985) . Central Tunisia was subdivided into northern, central, and southern subzones. Data about...
Experimental Drainfields: Standard subsurface sewage disposal systems, gravity loaded and 60 cm deep on slopes above 15% did not show signs of effluent surfacing after 14 months of operation. However, subsurface signs of failure were found on both the experimental sites and on older drainfields established in identical soils. Evidence...
The effect of soil temperature and plant water stress on nitrogen
uptake, growth rate and transpiration rate of wheat (Triticum aestivum
VILL. , Host) seedlings was studied. A special apparatus for the control
of plant water stress and root temperature was used.
Leaf area was measured by the air flow...
Community colleges today are experiencing monumental shifts in their operating
environments. Some of these changes are known, but many of them are not. They
include shifts in curriculum, funding, and societal expectation to name a few. Through
the constructs of high quality work environment and organizational fluidity theory, this
research...
Sod-seeding techniques offer graziers a convenient way to introduce superior grass cultivars into underproductive permanent pastures. Production loss and erosion are minimized. In conjunction with improved grazing management and fertilization, renovation can significantly improve yield and quality of pastures. Existent vegetation must be suppressed prior to introducing new cultivars. This...
The focus of this study was to examine the administrative legacy of two African American women administrators, Maxine Buie Mimms and Wintonnette Joye Hardiman, who administrated The Evergreen State College-Tacoma, Washington (TESC-T) campus for more than three decades. TESC-T is nationally known for its community-based curriculum and pedagogy, high retention...
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...
Wave dispersion and fracture are phenomena that involve. mechanisms triggered at the scale of a material's internal structure. Experiments were performed with a candidate material to judge the hypothesis that wave dispersion measurements can be used to nondestructively predict fracture strength. Wood-based particleboard was chosen as the candidate material because...
Science inquiry is central to the science education reform efforts that began in the early 1990's. It is both a topic of instruction and a process to be experienced. Student engagement in the process of scientific inquiry was the focus of this study. The process of scientific inquiry can be...
Different racial/ethnic groups often perceive the realities of the campus environment differently: This difference in perspective and the attendant reactions can be a factor in student satisfaction or dissatisfaction. A quantitative survey administered in 1996 and 1999 revealed that African-American students on the campus of a diverse two-year community college...
This qualitative thesis explored the experiences of self-identified Master-level graduate students who worked four or more years in higher education before enrolling into a student affairs graduate program. The researcher utilized a sample of six semi-structured student interviews along with a review of relevant literature. The data analysis yielded five...
In many areas of the Western U.S., diffuse knapweed (Centaurea diffusa Lam.)
has invaded into plant communities dominated by bluebunch wheatgrass
(Pseudomegnaria spicata [Pursh] A. Love). The objectives of this study were to compare
growth response of both species when grown under altered moisture and temperature
regimes while in the...
College campuses are becoming more diverse now than ever before. Campuses, however, are not as prepared as they should be for the new students that are arriving. Changes need to be made to status quo processes and procedures, event planning, and classroom education in order to best serve current students....
Ranchers and resource managers have become concerned about the
role and spread of Cardaria draba (L.) Desv. (whitetop) in the sagebrush
steppe of Northeastern Oregon. This area is an important natural resource
for livestock production and big game winter range.
An area near Keating, Oregon was selected to study the...
The rotating flighted cylinder (RFC) was investigated
as a potential wastewater treatment deVice. A RFC is a
rigid tube with a helically-wound fin attached to the interior
surface and operates by flowing wastewater through
the tube as it rotates.
An 8-inch and 24-inch
diameter RFC was tested for
solids-liquid
separation,...
This analysis is the study of Oregon's wildlife resources from
the period prior to white settlement up to the present time, including
critical projections, based on present trends and expected conditions
for both human and wildlife populations in the state up to the year 2010.
Prior to white settlement Oregon...
The purpose of this study was to look at how Latinx fraternities and sororities influence a Latinx student’s identity development, academics, and their sense of belonging at a historically white university. A qualitative narrative study was utilized to understand the experiences of the four participants and their responses to the...
The purpose of this study was to determine the importance and
the frequency of use of certain communication skills to job-entrylevel
mechanics as assessed by employers, educators at various levels,
and entry-level industrial mechanics. The study was conducted in
Lane County, Oregon. Communication skills investigated for importance
and for frequency...
Sudden changes occur where the mean values associated with two adjacent non-overlapping
windows of data are anomalously different, and the transition between the
window means occurs over a scale that is small relative to the scale of the windows.
Positions of sudden changes can be economically retrieved. The sudden change...
The main focus of this study was to determine how community college
administrators used certain personality traits (cues) in judging the
success potential of female and male administrative applicants.
The following hypotheses were tested:
1. There will be no significant difference in the weights
attached to the following cues when...
In this dissertation, we investigate three numerical methods for inverting the Laplace transform. These methods are all based on the trapezoidal-type approximations to the Bromwich integral. The first method is the direct integration method: It is a straightforward application of the trapezoidal rule to the Bromwich integral, followed by convergence...
The effect of a static quadrupole interaction on the 133-482 Kev
gamma-gamma angular correlation in Ta-181 has been studied by the
delayed coincidence method. Using a source of Hf-181 in polycrystalline
hafnium metal, the anisotropy was measured as a function of
time between the formation and decay of the 482...
Petroleum mulch applied on the soil surface over a row of
planted seeds promotes a more rapid and a more uniform germination
of seeds, enhances elongation of seedlings and in some cases increases
the yield of the crop. The beneficial effects of petroleum
mulch have usually been attributed to increased...
The effect of soil water suction and soil temperature on rates
of transpiration, photosynthesis, respiration and nitrogen fixation of
soybean (Glycine max. Merrill, var. Chippewa 64) seedlings was
studied. A special apparatus was developed in which the soil water
suction of several cells with soybeans growing in them could be...
The very stable boundary layer is a region of the atmosphere typified by large
vertical gradients of temperature and momentum. Analysis of very stable atmospheric
flows is complicated by the presence of nonlinear interactions among gravity waves, shear-driven
overturning circulations, two-dimensional vortical modes and intermittent turbulence
in various stages of...
The statistics describing variations of turbulent motions within the so called inertial range of length scales depend on the scale over which the motions are varying and the "average" rate at which the turbulent kinetic energy is being dissipated on the molecular scale. This hypothesis stemmed from the similarity arguments...
At present the adsorption kinetic of ions by soil particles is considered to be a surface reaction. When the transport of solutes in soils is described using the one-dimensional flow equation, it becomes a serious problem that lateral diffusion of ions from the bulk solution towards the soil surfaces is...
The purpose of this study was to understand the experiences of first-generation persons of color attending and persisting at a community technical college. Students of color continue to be an increasing population in our higher education system. Many of these persons of color are choosing to attend two-year institutions. A...
A number of investigators have proposed equations to predict
the permeability of porous media. Most of their equations are based
on the distributions of the sizes of the various contributing pores in
the medium. Presently the pore size distributions of agricultural
soils are most commonly obtained from soil water release...
The use of efficient basis functions to model and represent flows with
internal sharp velocity gradients, such as shocks or eddy microfronts, are
investigated. This is achieved by analysing artificial data, observed atmospheric
turbulence data and by the use of a Burgers' equation based spectral
model. The concept of an...
This thesis examines how two grass seed industries
respond to changes in the production environment. Two sets
of factors are necessary to understand what adjustments
would be made. First, it is necessary to know the nature of
the markets and whether market power is being exerted.
Second we need to...
This study explored how students navigate the technological landscape of a public, land-grant institution. Through online surveys and semi-structured, one-on-one interviews, the study operated through an anticipatory/participatory lens to research with the intent of understanding students' experiences with technology at a research institution. Using this methodology and Triandis and Triandis'...
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Larry D. Roper
This study explored how students navigate the technological landscape of a
Laboratory experiments were used to investigate the mechanism
of plant response to water stress by determining the sensitivity of leaf
elongation, photosynthesis and transpiration in young corn plants to a
decrease in leaf water potential.
In initial experiments, 9 day old corn plants were grown at soil
water potentials of...
This mixed methods qualitative thesis examined the relationships between co-mentors in the Faculty Student Mentor Program at Oregon State University through the reported experiences/perceptions of peer mentors. The researcher gathered information for this study utilizing data from two focus groups, a survey of peer mentors, and a review of relevant...
The contemporary student veteran population is growing rapidly as service members who served in the Afghanistan and Iraq conflicts take advantage of the Post 9/11 Veteran Educational Assistance Act of 2008 to receive educational benefits to attend college (Cook & Kim, 2009). However, student veterans entering college today have a...
The principles of continuum mechanics provide a consistent
framework for the derivation of mathematical statements describing
transport of water and solute, and growth in plant tissue. These
derivations are based upon the explicit consideration of the tissue as
a mathematical continuum composed of a cell wall matrix, water, and
solute...
Historically the national market for forest products has greatly
influenced the economies of Oregon and its regions because of the high
dependence of these economies on the forest products industry. With the
possibility of decreased timber production in the area and the high
probability of increasing demand for forest products...
The National Research Council has aggregated research evidence on the pedagogy of science teaching and learning (NRC, 2012), culminating in the Next Generation Science Standards (NGSS). These standards support emphasis on eight scientific practices as an important component for teaching science as inquiry to K-12 students. This latest framework for...
In a recent survey, it was observed that many woody plant species grown in Pacific Northwest nurseries exhibited disease symptoms typical of a bacterial infection and Pseudomonas syringae was commonly isolated from these tissues. The distribution of the ice nucleation phenotype among P. syringae strains recovered from these infected woody...
Experiments were conducted to study the effect of pore size
distribution on the diffusion of 2, 4-Dichlorophenoxyacetic acid (carbon-
14) through water saturated porous media. Eight size fractions of
glass beads were used representing the porous media. It was found
that as the average particle radius, and hence pore radius,...
In conversations about social change, community-based coalitions can be identified
as one of the driving factors in multi-level changes. Coalitions can be defined as
groups of people, organizations, countries, etc. united for a common goal. Coalitions
initially form to complete a common purpose, but also to build lasting connections for...
One of many important physical properties that must be known
to understand transport phenomena in soils is pore size distribution.
Presently the pore size distributions of soils are most commonly
obtained from soil water characteristic curves. The soil water characteristic
curves are usually obtained by the pressure plate technique.
It...
Gaseous diffusion equations which describe the diffusion of
oxygen and carbon dioxide through soil have been studied by several
investigators. However, these efforts seldom considered gaseous
diffusion through soil together with the effects of soil environmental
factors such as soil temperature and soil water content on sink or
source strength....
Gaseous transport through soil in the presence of soil
microorganisms has been investigated. More recently, modeling of
gaseous transport in the unsaturated zone has been investigated.
However, the problem of mathematical model of oxygen and carbon
dioxide transport through soil, as affected by the climatic
conditions, the transport of soil...
Atmospheric boundary layers become stably stratified at night over land when the surface becomes colder than the air layer above. In stable nocturnal boundary layers (SNBL), turbulence becomes weak and intermittent, terrain-induced phenomena such as drainage currents or gravity-waves emerge and the surface heterogeneity is enhanced. Because of their complexity...
This dissertation consists of two articles to be submitted for publication. The first,
a literature review, makes visible common influences on science teaching self-efficacy
beliefs and also points to potentially invisible validation concerns regarding the
instrument used. The second investigates the participants' invisible science teaching self-efficacy
beliefs and, through the...
An eigenvector analysis of the velocity-temperature correlation
matrix is applied to clear-air turbulence measured by aircraft in the
Bora. The eigenvectors are identified with the main eddies of the
turbulence. This study attempts to infer the three-dimensional
structure of these eddies. The results are compared with turbulent
structures in the...
The in planta growth of three wild type strains of phytopathogenic bacteria and three nonpathogenic mutant strains was studied to determine if mutations eliminating the ability of the mutant strains to cause disease had affected their growth in leaf tissue. The mutant strains were obtained by Tn5 mutagenesis of Pseudomonas...