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Equalization Of Loudspeakers And Enclosed Sound Fields, Xi Chen
Equalization Of Loudspeakers And Enclosed Sound Fields, Xi Chen
Theses and Dissertations
Equalization of loudspeakers and enclosed sound fields has been a topic of considerable interest for decades. Confusion has often arisen among audio professionals regarding the feasibility of simultaneously equalizing a loudspeaker and the enclosed field (i.e., the “room”) it excites. Because of frustrations encountered in such efforts, some have advocated abandoning simultaneous equalization altogether. This dissertation discusses the drawbacks of this approach as well as traditional in situ equalization methods. It demonstrates that many problems with traditional equalization stem from the use of measured acoustic pressure at a discrete point in a sound field as the system output. The dissertation …
Transparency And City Government Communications, Jennalande Oswald
Transparency And City Government Communications, Jennalande Oswald
Theses and Dissertations
This study expresses the need for a communications model created specifically for government communications that is centered on the concept of transparency. However, it also recognizes the previous research done pertaining to government communications and public relations. Importantly, the study recognizes the lack of trust in American government at city, state and federal levels and the need to improve trust, which is very closely related to transparency. The study focuses primarily on a model created in 2007 called the three-dimensional model for government communications. The model has four parts: the base of the model is the need to value transparency; …
Efficient Rotation Algorithms For Texture Evolution, Mark W. Esty
Efficient Rotation Algorithms For Texture Evolution, Mark W. Esty
Theses and Dissertations
Texture evolution is a vital component of many computational tools that link structure, properties and processes of polycrystalline materials. By definition, this evolution process involves the manipulation, via rotation, of points in orientation space. The computational requirements of the current methods being used to rotate crystalline orientations are a significant limiting factor in the drive to merge the texture information of materials into the engineering design process. The goal of this research is to find and implement a practical rotation algorithm that can significantly decrease the computation time required to rotate macroscopic and microscopic crystallographic textures. Three possible algorithms are …
A Closer Look At One Elementary School's Use Of Informational Text In Classroom Instruction, Marjean Sorensen
A Closer Look At One Elementary School's Use Of Informational Text In Classroom Instruction, Marjean Sorensen
Theses and Dissertations
The purpose of this action research study was to explore the use of informational text in kindergarten through sixth grade classrooms in one elementary school. The research was based on analyzing responses given by teachers on a self-report survey; which addressed various aspects of their use of informational texts. The survey included questions about the sources teachers used to find informational texts, the criteria used in selection of such texts, and the frequency and purposes for informational text use. These data were then compared according to teachers' years of teaching experience and grade level taught to see the influence of …
Influence Of Soil Water Repellency On Post-Fire Revegetation Success And Management Techniques To Improve Establishment Of Desired Species, Matthew D. Madsen
Influence Of Soil Water Repellency On Post-Fire Revegetation Success And Management Techniques To Improve Establishment Of Desired Species, Matthew D. Madsen
Theses and Dissertations
The influence of soil water repellency (WR) on vegetation recovery after a fire is poorly understood. This dissertation presents strategies to broaden opportunities for enhanced post-fire rangeland restoration and monitoring of burned piñon and juniper (P-J) woodlands by: 1) mapping the extent and severity of critical and subcritical WR, 2) determining the influence of WR on soil ecohydrologic properties and revegetation success, and 3) evaluating the suitability of a wetting agent composed of alkylpolyglycoside-ethylene oxide/propylene oxide block copolymers as a post-fire restoration tool for ameliorating the effects of soil WR and increasing seedling establishment. Results indicate that:
• Post-fire patterns …
Carbon Coated Tellurium For Optical Data Storage, Jonathan D. Abbott
Carbon Coated Tellurium For Optical Data Storage, Jonathan D. Abbott
Theses and Dissertations
A highly durable optical disk has been developed for data archiving. This optical disk uses tellurium as the write layer and carbon as a dielectric and oxidation prevention layer. The sandwich style CTeC film was deposited on polycarbonate and silicon substrates by plasma sputtering. These films were then characterized with SEM, TEM, EELS, ellipsometry, ToF-SIMS, etc, and were tested for writability and longevity. Results show the films were uniform in physical structure, are stable, and able to form permanent pits. Data was written to a disk and successfully read back in a commercial DVD drive.
Division Of Household Labor: Changes Over The Course Of The Marital Relationship, Christopher W. Matteson
Division Of Household Labor: Changes Over The Course Of The Marital Relationship, Christopher W. Matteson
Theses and Dissertations
Previous research has established the influence of the division of household labor between spouses on marital satisfaction, as well as the mental health of each spouse. Less is known about how the division of labor changes during the course of marriage. The family development perspective suggests that division of labor will change in response to different stages and circumstances, while the homeostasis perspective suggests that the division of labor will remain stable throughout the life course. This study used data from a 35 year longitudinal study of married women to examine changes of household division of labor over the life …
Development Of A Methodology For Numerical Simulation Of A D C Arc Discharge In A Liquid Dielectric, Christopher James Lewis
Development Of A Methodology For Numerical Simulation Of A D C Arc Discharge In A Liquid Dielectric, Christopher James Lewis
Theses and Dissertations
The majority of literature regarding the numerical simulation of arc discharges in gaseous environments has used a plasma physics approach. Virtually all simulations treat the discharge as an idealized gaseous plasma, which can be described by temperature, pressure, and electric field. This approach can work well if the media is a shielding gas such as Argon; however, the approach does not work well for processes such as underwater welding, EDM, and underwater discharges used to generate high purity particles. The reason these discharges do not have many extensive simulation efforts as described in the literature is because they occur in …
Passive Earth Pressures On A Pile Cap With A Dense Sand Backfill, Robert Ashall Marsh
Passive Earth Pressures On A Pile Cap With A Dense Sand Backfill, Robert Ashall Marsh
Theses and Dissertations
Pile groups are often used to provide support for structures. Capping a pile group further adds to the system's resistance due to the passive earth pressure from surrounding backfill. While ultimate passive earth pressure under static loading conditions can be readily calculated using several different theories, the effects of cyclic and dynamic loading on the passive earth pressure response are less understood. Data derived from the full-scale testing of a pile cap system with a densely compacted sand backfill under static, cyclic, and dynamic loadings was analyzed with particular focus on soil pressures measured directly using pressure plates. Based on …
Inferring Dispersal Of Aquatic Invertebrates From Genetic Variation: A Comparative Study Of An Amphipod (Talitridae Hyalella Azteca) And Mayfly (Baetidae Callibaetis Americanus) In Great Basin Springs, Heather Lynn Stutz
Theses and Dissertations
Whether active or passive, dispersal accompanied by gene flow shapes the population genetics and evolutionary divergence of species. Indirect methods which use genetic markers have the ability to assess effective dispersal—that which resulted in gene flow. My objective was to see if an aquatic insect and an obligate aquatic invertebrate show similar phylogeographic patterns and genetic uniqueness. Hyalella azteca and Callibaetis americanus were collected from 4-5 springs in each of six basins in the Great Basin of western North America. No dispersal or genetic studies of C. americanus have been conducted to date. However, several studies focusing on mtDNA diversity …
Energy Dissipation Caused By Asphalt Roadway Gouges For Use In Accident Reconstruction, Charles L. Crosby
Energy Dissipation Caused By Asphalt Roadway Gouges For Use In Accident Reconstruction, Charles L. Crosby
Theses and Dissertations
In reconstruction of on-roadway vehicle accidents, roadway surface gouges and the forces and energy attributed to the related vehicle components become important keys to resolving an accurate accident reconstruction. These roadway gouge forces vary depending upon such factors as surface temperature and the velocity and geometry of the gouging mechanism. Accounting for the forces applied to vehicle components and the energy dissipated from such forces can be helpful in accident reconstruction where supporting data exists. This research documents the force necessary to create a given roadway gouge geometry. Controlled pavement gouging tests were performed using roadway surface temperature and gouging …
Acoustic Mediation Of Vocalized Emotion Identification: Do Decoders Identify Emotions Idiographically Or Nomothetically?, Michael Kenneth Lauritzen
Acoustic Mediation Of Vocalized Emotion Identification: Do Decoders Identify Emotions Idiographically Or Nomothetically?, Michael Kenneth Lauritzen
Theses and Dissertations
Most research investigating vocal expressions of emotion has focused on one or more of three questions: whether there exist unique acoustic profiles of individual encoded emotions, whether the nature of emotion expression is universal across cultures, and how accurately decoders can identify expressed emotions. This dissertation begins to answer a fourth question, whether there exist unique patterns in the types of acoustic properties persons focus on to identify vocalized emotions. Three hypotheses were tested: first, whether acoustic patterns are interpreted idiographically or nomothetically as reflected in a comparison of individual vs. group lens model identification ratios; second, whether there exists …
Comparison Of Single-Use And Multiple-Use Electrodes For Sensory, Motor Threshold Amplitudes And Force Production, Lucia Maloy
Comparison Of Single-Use And Multiple-Use Electrodes For Sensory, Motor Threshold Amplitudes And Force Production, Lucia Maloy
Theses and Dissertations
Context: Electrodes play an important role in interfacing tissue with electrical stimulation devices. Manufacturers recommend that adhesive metallic mesh cloth electrodes be used no more than 10 times before they are discarded, however, clinically the electrodes are often used up to 30 times. Another concern is sanitation. When electrodes are used on different patients, there is a chance for cross-contamination and bacterial growth on the electrode. Objective: To compare amplitudes of perceived sensation, motor twitch and force produced at specific amplitudes using single-use electrodes that run no risk of cross-contamination, and multiple-use electrodes. Design: Mixed model ANOVA with the subject …
The Ecological Importance Of Extrinsic And Intrinsic Drivers Of Animal Movement, Josh Earl Rasmussen
The Ecological Importance Of Extrinsic And Intrinsic Drivers Of Animal Movement, Josh Earl Rasmussen
Theses and Dissertations
The movement of individuals is foundational to many ecological processes. For example, the movement of an organism from one place to another alters population density at both sites and has potential for affecting the genetic dynamics within the new population. Individual movement events may be in synchrony with overall trends in populations, e.g. spawning migrations, or may be atypical (asynchronous). This latter movement type can affect population and metapopulation dynamics, depending on its prevalence within a population. Nevertheless, given the complexity of interactions, the causative factors of movement are understood vaguely, much less for aquatic organisms. Drivers of movement are …
Progress Toward The Total Synthesis Of Lyconadin A, Yu Zhang
Progress Toward The Total Synthesis Of Lyconadin A, Yu Zhang
Theses and Dissertations
Lyconadin A is a pentacyclic Lycopodium alkaloid isolated from the club moss Lycopodium complanatum with antitumor properties. We have developed a novel 7-exo/6-exo acyl radical cascade cyclization as a method of making the bicyclo[5.4.0]undecane ring system of lyconadin A. The model products are trans-fused ring systems, while a cis-fused ring system is needed in lyconadin A. We have discovered a method to convert the trans-fused model cascade cyclization product into the desired cis isomer. Based on Donohoe's pyridone synthesis, we developed a method for the construction of 5-alkyl and 3,5-dialkyl-6-carbomethoxy-2-pyridones, the former of which …
Analysis Of Electromagnetic And Seismic Geophysical Methods For Investigating Shallow Sub-Surface Hydrogeology, Eric M. Parks
Analysis Of Electromagnetic And Seismic Geophysical Methods For Investigating Shallow Sub-Surface Hydrogeology, Eric M. Parks
Theses and Dissertations
An integrated electromagnetic (EM) and seismic geophysical study was performed to evaluate non-invasive approaches to estimate depth to shallow groundwater in arid environments with elevated soil salinity where the installation of piezometers would be impractical or prohibited. Both methods were tested in two study areas (semi-arid and arid respectively), one in Palmyra, Utah, USA near the shore of Utah Lake where groundwater is shallow and unconfined in relatively homogeneous lacustrine sediments. The other area is Carson Slough, Nevada, USA near Ash Meadows National Wildlife Refuge in Amargosa Valley. The area is underlain by valley fill, with generally variable shallow depths …
Measuring Marriage Or Measuring Individuals: An Ontological Analysis Of Marital Therapy Outcome Measures, Joseph Andrew Ostenson
Measuring Marriage Or Measuring Individuals: An Ontological Analysis Of Marital Therapy Outcome Measures, Joseph Andrew Ostenson
Theses and Dissertations
Many scholars have noted the pervasiveness of individualism in American culture, particularly in the marriage culture. Unfortunately, assuming individualism in the marriage culture poses very specific threats to marriage as an institution. Some claim that these individualistic assumptions have also infiltrated the marital sciences, undermining the efforts of researchers who hope to defend marriage. This dissertation explores that claim by analyzing seven of the most popular marital outcome instruments used by marital researchers today for individualistic assumptions. Using a conceptual analysis called "contrasting relations," the meanings of both the content and the process of the instruments are laid out according …
Fealty And Free Will: Catholicism And The Master/Servant Relationship In The Lord Of The Rings, Emily Bytheway
Fealty And Free Will: Catholicism And The Master/Servant Relationship In The Lord Of The Rings, Emily Bytheway
Theses and Dissertations
This thesis asserts that one aspect of The Lord of the Rings which has been previously overlooked is the hierarchical nature of the master/servant relationship, which mirrors in many ways the hierarchical nature of the Catholic church. Through the various master/servant relationships that Tolkien portrays, he reflects not only the ideal of master and servant working together for good, but also the ways in which this intimate relationship can go horribly wrong. Aragorn represents an ideal master, one who is wise and good, and his servants are either rewarded or punished according to their loyalty to him. In the stories …
Cocaine And Mefloquine-Induced Acute Effects In Ventral Tegmental Area Dopamine And Gaba Neurons, David Wilbanks Allison
Cocaine And Mefloquine-Induced Acute Effects In Ventral Tegmental Area Dopamine And Gaba Neurons, David Wilbanks Allison
Theses and Dissertations
The aim of the two studies presented here was to evaluate the effects of cocaine and mefloquine (MFQ) on γ-aminobutyric acid (GABA) and dopamine (DA) neurons in the ventral tegmental area (VTA). Cocaine: In vivo, lower doses of intravenous cocaine (0.25-0.5 mg/kg), or methamphetamine (METH), enhanced VTA GABA neuron firing rate via D2/D5 receptor activation. Higher cocaine doses (1.0-2.0 mg/kg) inhibited their firing rate. Cocaine and lidocaine inhibited the firing rate and spike discharges induced by stimulation of the internal capsule (ICPSDs) at dose levels 0.25-2 mg/kg (IC50 1.2 mg/kg), but neither DA nor METH reduced ICPSDs. In VTA …
Influence Of Cardiac Output On Oxygen Uptake Kinetics, Crystelle Kiyoko Grant
Influence Of Cardiac Output On Oxygen Uptake Kinetics, Crystelle Kiyoko Grant
Theses and Dissertations
The purpose of this study was to evaluate increased cardiac output (Q) on oxygen kinetics at exercise intensities above and below the lactate threshold (LT). We hypothesized the increase in Q using head-out water immersion (HOI) while treadmill running would reduce the rate constant of the fast component and reduce the amplitude of the slow component of oxygen kinetics compared with land treadmill running. Subjects (n=10) performed two 6 min exercise bouts at a 15% below and above the LT on a land and underwater treadmill following rest. A single exponential equation [VO2(t) = VO2(b) + A1•(1-e-t/TC1] was used to …
Bisecting Document Clustering Using Model-Based Methods, Aaron Samuel Davis
Bisecting Document Clustering Using Model-Based Methods, Aaron Samuel Davis
Theses and Dissertations
We all have access to large collections of digital text documents, which are useful only if we can make sense of them all and distill important information from them. Good document clustering algorithms that organize such information automatically in meaningful ways can make a difference in how effective we are at using that information. In this paper we use model-based document clustering algorithms as a base for bisecting methods in order to identify increasingly cohesive clusters from larger, more diverse clusters. We specifically use the EM algorithm and Gibbs Sampling on a mixture of multinomials as the base clustering algorithms …
Interactive Football Summarization, Brandon B. Moon
Interactive Football Summarization, Brandon B. Moon
Theses and Dissertations
Football fans do not have the time to watch every game in its entirety and need an effective solution that summarizes them the story of the game. Human-generated summaries are often too short, requiring time and resources to create. We utilize the advantages of Interactive TV to create an automatic football summarization service that is cohesive, provides context, covers the necessary plays, and is concise. First, we construct a degree of interest function that ranks each play based on detailed, play-by-play game events as well as viewing statistics collected from an interactive viewing environment. This allows us to select the …
Studies On The Performance And Impact Of Channel Estimation In Mimo And Ofdm Systems, Michael David Larsen
Studies On The Performance And Impact Of Channel Estimation In Mimo And Ofdm Systems, Michael David Larsen
Theses and Dissertations
The need for reliable, high-throughput, mobile wireless communication technologies has never been greater as increases in the demand for on-the-go access to information, entertainment, and other electronic services continues. Two such technologies, which are at the forefront of current research efforts, are orthogonal frequency division multiplexing (OFDM) and multiple-input multiple-output (MIMO) systems, their union being known simply as MIMO-OFDM. The successful performance of these technologies depends upon the availability of accurate information concerning the wireless communication channel. In this dissertation, several issues related to quality of this channel state information (CSI) are studied. Specifically, the first part of this dissertation …
Noninvasive Estimation Of Pulmonary Artery Pressure Using Heart Sound Analysis, Aaron W. Dennis
Noninvasive Estimation Of Pulmonary Artery Pressure Using Heart Sound Analysis, Aaron W. Dennis
Theses and Dissertations
Right-heart catheterization is the most accurate method for estimating pulmonary artery pressure (PAP). Because it is an invasive procedure it is expensive, exposes patients to the risk of infection, and is not suited for long-term monitoring situations. Medical researchers have shown that PAP influences the characteristics of heart sounds. This suggests that heart sound analysis is a potential noninvasive solution to the PAP estimation problem. This thesis describes the development of a prototype system, called PAPEr, which estimates PAP noninvasively using heart sound analysis. PAPEr uses patient data with machine learning algorithms to build models of how PAP affects heart …
Facilitating The Generalization Of Social Skills With Bibliotherapy And Positive Peer Reporting, Angelina C. Krieger
Facilitating The Generalization Of Social Skills With Bibliotherapy And Positive Peer Reporting, Angelina C. Krieger
Theses and Dissertations
Social competence is needed for interaction among peers, teachers, and families in order for children to be successful in school. Children enter school with various levels of social competence. Social skills training is an effective method for building social skills; however, many programs fail to generalize these skills across settings and time. This study investigated the effects of a social skills training intervention for first and second grade students with emotional and behavioral problems. The intervention blended direct instruction, role-plays, and children's literature, with peers supporting both the acquisition and generalization of the social skills through positive peer reporting (PPR) …
An Adaptive Bayesian Approach To Dose-Response Modeling, Thomas J. Leininger
An Adaptive Bayesian Approach To Dose-Response Modeling, Thomas J. Leininger
Theses and Dissertations
Clinical drug trials are costly and time-consuming. Bayesian methods alleviate the inefficiencies in the testing process while providing user-friendly probabilistic inference and predictions from the sampled posterior distributions, saving resources, time, and money. We propose a dynamic linear model to estimate the mean response at each dose level, borrowing strength across dose levels. Our model permits nonmonotonicity of the dose-response relationship, facilitating precise modeling of a wider array of dose-response relationships (including the possibility of toxicity). In addition, we incorporate an adaptive approach to the design of the clinical trial, which allows for interim decisions and assignment to doses based …
Revisiting The Personal Influence Model As An Ethical Standard In Public Relations Theory And Practice, Rita Somfai
Revisiting The Personal Influence Model As An Ethical Standard In Public Relations Theory And Practice, Rita Somfai
Theses and Dissertations
This thesis attempts to better understand the importance and application of the personal influence model in relationship building between organizations and public decision makers. The personal influence model was added by Sriramesh and Grunig (1992) as a potential fifth model to Grunig and Hunt's (1984) four models of public relations practice (as cited by Grunig in Heath, 2007); however, this essential relationship building approach has not been examined in the public relations literature as it could have been. Scholarly research since the addition of the personal influence model has mostly occurred in Asia and India. Studies on the topic have …
Lake Salt: A Creative Thesis, Erica Lindsay Plummer
Lake Salt: A Creative Thesis, Erica Lindsay Plummer
Theses and Dissertations
This collection of short stories explores the different ways in which women experience suffering. The narrative focuses on the daily lives of women who have undergone some type of heartbreak. While the stories occasionally include the incident which leads to despair, the collection is more concerned with the way women function after a personal tragedy. The stories show the grace of people who continue to move forward when their lives are filled with suffering. Sexuality enters the stories and exposes both the triumph and destructive nature of sexuality. A critical introduction which explains how complication and beauty amplify story proceeds …
Research Experiences For Undergraduates: An Evaluation Of Affective Impact, Brian N. Chantry
Research Experiences For Undergraduates: An Evaluation Of Affective Impact, Brian N. Chantry
Theses and Dissertations
Each year the National Science Foundation (NFS) grants funding for universities in the United States to provide a Research Experiences for Undergraduates (REU) summer program. The Department of Physics and Astronomy at Brigham Young University (BYU) has been a recipient of NSF REU grants for several years. This year the administrators of the REU program at BYU requested an evaluation be conducted to determine if their program was effective at helping participants have a significant research experience, as well as determine the impact the program is having on student's attitudes towards the field of physics, graduate school, and research. This …
The Life And Origins Of Paul Bunyan: Part One, Michael Ryan Croker
The Life And Origins Of Paul Bunyan: Part One, Michael Ryan Croker
Theses and Dissertations
Master of Fine Arts This novel is a chronicle of the early days of Paul Bunyan, an important figure in American folk culture. While Paul Bunyan is a central figure in the tale, the story itself is told through the eyes of Clay Filinger, a young man from the backwoods of Kentucky who leaves his home on a journey of American exploration. Clay reaches Boston, where he hires on to work for John Patrick, a wealthy merchant headed to Maine in search of pirate treasure. John is travelling with his nephew, Randolph Bunyan. Along with them are two more hired …