Tabletop role-playing games (TRPG) such as Dungeons & Dragons™ are widely known and enjoyed by diverse individuals across the world. However, TRPGs and their players historically have experienced significant stigmatization due to the misconception by some that fantasy role play leads to psychological dysfunction. While a large body of research...
The self-help literature is full of texts on both self-compassion and postpartum depression. However, there has been minimal scientific exploration of the literature on these topics. As such, mental health researchers and practitioners have little sense of the psycholinguistic discourse contained in this literature. This study aimed to fill this...
Self-harm is a frightening phenomenon that affects adolescents and young adults all over the world. While non-suicidal self-injury (NSSI) has a high prevalence rate, it is not a new behavior. One of the earliest documented cases of NSSI was in ancient Greece and it has gained popularity amongst adolescents. NSSI...
On social media platforms and on blog sites, disordered behavior as a lifestyle choice is a growing trend that supports and promotes behaviors related to self-harm and anorexia. Web content advocating self-harm and anorexia can be found easily through search engines or can be concealed in the social media sphere...
Corpus linguistics studies involving lyrics continue to grow. While previous research has pointed to a positive relationship between certain personality traits and music types, the relationship between lyrics and suicide is understudied. As such, mental health researchers and practitioners have little sense of how the language of someone who has...
Domestic violence (DV) is pervasive worldwide and has negative psychological effects that last a lifetime. Although DV is a problem that affects all societies, it is addressed through varied legal responses and with gaps in comprehension when examined through a cultural lens. The findings of these studies have the potential...
Establishing a therapeutic alliance or a therapeutic bond has long been seen as an essential component of obtaining positive treatment outcomes in clinical practice. More recently, the idea of recognizing therapeutic alliance ruptures (disagreements about the tasks or goals of therapy or a problem in the therapeutic bond) during counseling...
Counselors are tasked with being knowledgeable about assessing and treating a broad range of mental health issues. There has been an overall rise in mental health symptoms in individuals during the current COVID-19 pandemic, as well as the increased use of online internet forums as part of help-seeking behaviors. Obsessive-Compulsive...
The number of deaths by suicide each year in the United States is rising. Men, women, and people of all ages die by suicide at high rates. Someone diagnosed with anorexia or bulimia is at significantly greater risk of completing or attempting suicide, making clear the importance of understanding how...
The major purpose of this research was to study the in-service
programs for community college vocational instructors, and develop
guidelines for a cooperative work experience approach to in-service
staff development.
The specific objectives of the study were:
(1) To develop a research instrument capable of measuring the
agreement relative to...
Baseline data for the first year of a two-year study to assess
the current status of ponderosa pine stands in southeastern
Montana relative to coal-fired electric power development are
presented. Sixteen permanent plots in pine stands were established
in eastern Montana, South Dakota, and Wyoming. Several characteristics
believed to be...
Interannual variability of Humboldt squid (Dosidicus gigas) occurrence in the northern California Current System is largely unknown. In Oregon, the distribution of this versatile predator and what is influencing their range expansion from Mexico is poorly understood due to the recent nature of their "invasion" and a lack of monitoring....
Amateur Packet Radio Networking presently uses the NET/ROM
protocol to establish the network. NET/ROM is considered to be
insufficient to support the expected growth of the network. This
research work proposes to use the TCP/IP protocol suite instead to
build the network. A comparison between features of both protocols
supports...
A circuit which functions as a controlled negative-resistance is
described and analyzed; the circuit contains two transistors, a breakdown
diode, and five resistors connected in a stable feedback configuration.
From the analysis a set of design equations is derived.
An experimental circuit is described and a comparison between
measured performance...
The primary focus of this work is on examining structure-property relationships of interest for high-power nonlinear optical and laser crystals. An intuitive and simply illustrated method for assessing the nonlinear optical potential of structurally characterized noncentrosymmetric materials is introduced. This method is applied to materials including common quartz and tourmaline...
The study (1) describes the life cycle of P. nebulosus,
(2) examines stimuli that may cause the beetles to locate brood
material, and (3) establishes the relationship between moisture
stress in Douglas-fir and colonization by P. nebuZosus.and other
meristem insects.
(1) Development of P. nebulosus goes through the egg stage,...
The purpose of this study was to determine if
differences existed between computer specialists and
computer-using teachers on the perceived level of
importance of selected computer competencies for elementary
teachers. The sample consisted of 102 computer specialists
and 111 computer-using teachers in public elementary
schools of Oregon. Data were gathered...
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...
This paper presents the design of a continuous-time ΔΣ modulator (CTDSM) to be used in an ultrasound beamformer for biomedical imaging. To achieve better resolution, the prototype modulator operates at 1.2 GHz. It incorporates a digital excess loop delay (ELD) compensation to replace the active adder in front of the...
This thesis presents a continuous time bandpass delta sigma modulator with frequency translation inside the delta sigma loop. The input IF signal is down converted to baseband after amplification by a low Q, wideband bandpass resonator. The down converted IF signal is digitized by a continuous time, second order lowpass...
A continuous amperometric monitor for aqueous sulfite solutions
has been developed employing the electro-oxidation of sulfur (IV)
in 0. 1 M sulfuric acid at a glassy carbon test electrode. The monitor
employs a hydrodynamic flow cell, in which the solution stream
enters the cell through an orifice impinging on the...
Published December 1903. 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
A contingent valuation methodology was applied to old-growth forests and critical habitat units for the Northern Spotted Owl in Oregon to esimate the economic value to the public in knowing that rare and unique ecosystems will be protected from fire for current and future generations. Generalizing to the whole state,...
Streams across the western United States are impaired from human alterations that have reduced freshwater habitat by simplifying channel complexity and disconnecting floodplains (Knox et al., 2022; Waples et al., 2008; Wohl, 2014). Climate change is likely to continue exacerbating these risks by warming summer surface stream temperatures (Crozier et...
The purpose of this study was to evaluate a contextual model for integrating lessons
from the LifeKnowledge curriculum into the agricultural science and technology (AST) course content. This was measured using the National FFA Organization’s online precept indicator which is part of the LifeKnowledge 3.0 curriculum. Ninth grade students at...
Complex social–ecological systems such as small-scale fisheries require the inclusion of human dimensions in fisheries management and planning for simultaneously preserving human health and habitat health. However, linkages between ecological, social, political and economic subsystems have been largely ignored in conventional fisheries management, in Nigeria in particular. Hence, the weak...
Complex social–ecological systems such as small-scale fisheries require the inclusion of human dimensions in fisheries management and planning for simultaneously preserving human health and habitat health.However, linkages between ecological, social, political and economic subsystems have been largely ignored in conventional fisheries management, in Nigeria in particular. Hence, the weak governance...
The purpose of this dual-manuscript dissertation is to assess and synthesize the current body of qualitative literature on the topic of the experience of counselor trainees as participants in experiential groups. The first manuscript is presented in Chapter 2. In this study, I performed a directed content analysis on 15...
The current study was a content analysis of court opinions on grandparent
visitation rights using the method of grounded theory. The research questions
addressed in this study were: (a) On what bases were grandparents granted legal
standing to petition for visitation with their grandchildren? (b) What was the legal
reasoning...
A heuristic is developed to plan loads for containerized cargo ships. It is designed to serve a port which uses gantry cranes (transtainers) and trucks to handle containers. The model recognizes constraints on ship stability, placing containers in a bay with the proper length, placing refrigerated cargo near electrical outlets,...
It is well- known that a real number can be defined as an equivalence
class of fundamental rational sequences. In fact, it is also possible
to define a real number as an equivalence class of sequences of
nested closed rational intervals. This paper is devoted to the latter
case.
This assessment outlines an enhanced planning approach for West Coast estuaries that incorporates an evaluation of the regional context for estuarine conservation and recommends an approach to site-scale planning with more focus on ecological processes and functions.
A configuration-interaction determination of wave
functions has been made for the ²S and ²P states of lithium,
and for the ¹S and ³S states of the lithium ion.
Two 1s, one 2s, one 3s, and two 2p functions served as
starting functions for all four states. Results of the
total...
In this paper we investigate the Lyapunov mapping
P --> AP + PA *
where A is a positive stable matrix and P is a hermitian
matrix. In particular, for special positive stable A we
characterize the image of the cone of positive definite matrices
under this mapping. In Section...
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...
Published July 1939. 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
One of the most serious problems confronting modern America
is the efficient and rational utilization of the recreation resource base,
not only in terms of present demands and needs, but future as well.
The resource manager, in the past, has had few guidelines from
which to determine the type and...
Women entrepreneurs are an economic force within the American and Oregon economy. Women are starting businesses at two to five times the rate of men. There has been significant research detailing the demographics, barriers, and business management skills of women business owners. Yet, the research to date has been limited...
The conceptual framework of an erosion model has been designed to link processes of mass wasting, surface erosion, and channel storage and transport. A program to stimulate mass wasting will be based on a variation of the factor of safety approach which balances forces tending to drive mass movement against...
Although much effort has been invested to build applications that support group work, collaborative applications have not found easy success. The cost of adopting and maintaining collaborative applications has prevented their widespread use, especially among small distributed groups. Application developers have had difficulties recognizing the extra effort required by groups...
The concept of large-scale natural resources planning and
management is not new. The idea that resources and their human users occur as systems over large geographic areas has a long established tradition in forest, range, water, and air management sciences. Recent trends in this thinking concern the recognition of the...
Much like wind energy in its early years, marine energy has vast potential, and wave energy converter (WEC) concepts are constantly in development. Consequently, wave energy faces many challenges for expansion and has a wide-ranging design space of WEC concepts. The large design space demands new methods for understanding the...
Since the introduction of lean manufacturing by Toyota and publication by Womack and Jones, organizations have realized sizeable gains through lean process improvement. The spread of lean practices across organizations and industries – from manufacturing to healthcare and construction – requires adjustments of the lean process and, in the case...
An interface was developed between COMSOL Multiphysics™ finite element analysis software and (geo)chemical modeling platform, GEMS, for the reactive-transport modeling of (geo)chemical processes in variably saturated porous media. The two standalone software packages are managed from the interface that uses a non-iterative operator splitting technique to couple the transport (COMSOL)...
Much has been written concerning the determination
of a single sampling plan given two points on the operating characteristic (OC) curve. A computer program is
presented which will provide minimum sample size for
single sample attribute sampling plans. The program
provides sampling plans based on the binomial distribution. It incorporates...
This project aims at building a Java application and a Java applet that would simulate a Stern-Gerlach laboratory in Quantum Mechanics. The project provides a tool for allowing the student to quickly design and run on the computer screen a number of experiments involving spin systems. This application could be...
In current practice, design documentation often fails
to support the activities of design understanding,
communication, and redesign. A Design History Tool has been
developed to improve current design documentation. This
tool is a computerized design history that represents and
plays back important information generated during the
process of designing a...
Qualitative data analysis (QDA) is a time consuming and, potentially unreliable research activity. In qualitative research, a number of tasks must be repeated for every new research case, even if each case is closely related or is in the same area of study.
Existing QDA applications provide users with a...
This study was initiated to determine the relative efficiency
of systematic, stratified and simple random sampling for crown area
and tree frequency estimation of five of the major forest types found
in the Pacific Northwest. Several of the more common methods of
estimating spatial distribution coefficients were evaluated. Finally
the...
Published October 1967. 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
Four study sites were selected along an altitudinal gradient on Mt. Ashland in the Siskiyou Mountains of southern Oregon. The altitudinal gradient roughly corresponded to a gradient in temperature and water availability ranging from very hot and dry to cool and moist. Air and soil temperatures were continuously measured on...
The dynamics of land use in the State of Oregon are simulated
on a digital computer. The introductory chapter outlines the complex
nature of the problems facing the post-industrial society and argues
that the scientific and professional estates share in the responsibility
for public policy formulation. The second chapter .presents...
Chemical equilibrium is a major factor in many natural and
industrial systems. The ability to predict ionic equilibrium is
extremely valuable in industry in solving problems without the costs
involved in full scale experiments. An example of an application in
the pulp and paper industry is the prediction of non-process...
The development of the energy crisis has caused the
use of depletable energy resources to be monitored quite
closely in the United States. Within the agricultural
sector, irrigation is a large user of energy, with the
potential of using many times more energy than all other
agricultural field operations. A...
Mass transfer from a single rising gas bubble in water may be analyzed by numerical methods. In this study the simultaneous differen- tial equations which describe two component mass transfer from a rising gas bubble are solved by numerical integration. This is accomplished using a computer model which employs a...
Significant reductions in the number of defects in parts
produced by investment casting can be obtained by improving
the flow of the molten metal during pouring. Studies have
been done at Oregon State University with simulated casting
techniques to determine optimal mold configurations.
Better mold layouts have been shown to...
This paper describes a computer program developed for the Hewlett
Packard 9830, which analyzes and computes costs and engineering
data for paper plan timber harvest road networks. The program will
accept up to 110 road segments. Each segment is analyzed individually
based on digitized data from a contour map and...
A new, computer oriented system for automatic, in situ
monitoring of water quality is proposed which makes full and effective
use of modern computer technology. The main objective of this thesis
work was the development of the concept for in situ computer controlled
experimenting as a reasonable and effective means...
The High Temperature Lattice Test Reactor (HTLTR) at Richland,
Washington, operates at temperatures up to 1000°C. Its low nuclear
power requires a 384 kilowatt electrical heating system, that is
divided into four circuits, to attain the high temperatures in the
ten-foot cube of moderating graphite. This thesis describes the
design...
The determination of the optimal location of transceivers is a critical design factor when deploying a wireless local area network (WLAN). The performance of the WLAN will improve in a variety of aspects when the transceivers' locations are adequately determined, including the overall cell coverage to the battery life of...
A complete approach to uncertainty management requires support for interactive and incremental problem formulation, inference, hypothesis ranking, and decision making. In addition, computational models must allow for time and resource bounds. Current approaches to uncertainty management concentrate primarily on inference, provide little or no support for the larger issues in...
A computational model for a resonantly coupled alpha free-piston Stirling cooler
is presented. The cooler consists of two isothermal working spaces for compression and
expansion connected by a regenerator consisting of a stack of narrow parallel channels.
The regenerator is assumed to have a linear temperature distribution along its axial...
Let H be a cyclically-presented group on n generators with a single defining relator. Attempts have been made to classify such groups by their order, their status as a 3-manifold group, and the asphericity status of their presentations. For groups with a defining relator of length 3 these classifications are...
The nuclear industry has shown a large interest in natural circulation driven passive cooling systems following the Fukushima nuclear accident. Despite this interest, there is no widely used heat transfer correlation or friction factor correlation developed for natural circulation driven flow. A CFD analysis including grid convergence testing using Fluent...
It is desirable for complex engineered systems to perform missions efficiently and economically, even when these missions' complex, variable, long-term operational profiles make it likely for hazards to arise. It is thus important to design these systems to be resilient so that they will actively prevent and recover from hazards...
The subject of fluid-structure interactions (FSI) are a matter concerning the design of any element immersed in a fluid. One of the most critical phenomena embedded within the scope of FSI is the creation of vortex-induced vibrations (VIV). These type of vibrations originate in a given body as a result...
The potential of red blood cell (RBC) and platelet damage was studied for a novel microfluidic hemoperfusion device currently in development at Oregon State University for use in treating sepsis. COMSOL 4.4's computational fluid dynamics (CFD) module was used to examine shear rate profiles in laminar, Newtonian blood flow throughout...
Vibration of nuclear fuel rods is an area of significance for the long-term safe operation of any nuclear power plant. One mechanism of vibration, flow induced vibration (FIV), must be quantified when designing a new core, such as a sodium fast reactor which employs helically-wrapped wire spacers. Experimental work undertaken...
A phoswich detector with two scintillation layers has been designed and assembled at Oregon State University. This detector is able to identify and reject Compton events and ultimately reduce the Compton continuum in gamma energy spectra. In this detector, CsI(Tl) crystal is used to primarily detect photoelectric events. The CsI(Tl)...
There are two problems with current cylindrical projections for world maps. First, existing cylindrical map projections have a static height-to-width aspect ratio and do not automatically adjust their aspect ratio in order to optimally use available canvas space. Second, many of the commonly used cylindrical compromise projections show areas and...
This study had two purposes: to determine solid waste management needs of residents and organizations of the San Xavier District Indian reservation near Tucson, Arizona; and to develop a solid waste management plan to be recommended to the San Xavier District Tribal Council.
A solid waste generation study compared the...
The performance of transit networks must be measured on a regular basis to understand how well these complex systems fulfill their intended purpose and to identify potential opportunities for improvement. Measuring transit network performance is only achievable by defining a specific set of transit network performance indicators (TNPIs). Different schemes...
Previous research has shown that using fine lightweight aggregate (FLWA) can be a promising strategy to mitigate alkali-silica reaction (ASR) in mortar and concrete. While several possible theories were proposed by researchers, discrepancies in testing methods, materials, and supporting evidence still exist. Therefore, this study was initiated. There are two...
Retention of engineering students is a problem for many universities, especially during the first year. The problem of introducing students to engineering while increasing retention rates has recently been addressed by many different universities. Implementing novel lab structures, adjusting the lecture to incorporate more effective teaching techniques, and using orientation...
During the end of a pet’s life its owner is often in emotional turmoil over how to feel and what to do. A veterinarian can alleviate some of this grief by effectively communicating during a terminal diagnosis and end-of-life discussion. Effective communication includes acknowledging the unique human-animal bond between client...