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Selecting The Best Linear Mixed Model Using Predictive Approaches, Jun Wang Jan 2007

Selecting The Best Linear Mixed Model Using Predictive Approaches, Jun Wang

Theses and Dissertations

The linear mixed model is widely implemented in the analysis of longitudinal data. Inference techniques and information criteria are available and well-studied for goodness-of-fit within the linear mixed model setting. Predictive approaches such as R-squared, PRESS, and CCC are available for the linear mixed model but require more research (Edward, 2005). This project used simulation to investigate the performance of R-squared, PRESS, CCC, Pseudo F-test and information criterion for goodness-of-fit within the linear mixed model framework. Marginal and conditional approaches for these predictive statistics were studied under different variance-covariance structures. For compound symmetry structure, the success rates for all 17 …

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With Real Intent: An Unexpected Gift, Larry Echohawk Jan 2007

With Real Intent: An Unexpected Gift, Larry Echohawk

Journal of Book of Mormon Studies

The Pawnee people endured many hardships through the years, but EchoHawk explains that out of that pain was born promise. During his childhood, EchoHawk and his family had no expectation of achieving a higher education, but he, along with all of his siblings, was able to attend college. Through a football accident in high school, he gained the personal testimony he hadn’t possessed when he was baptized at 14. His testimony and his football took him to Brigham Young University, where President Spencer W. Kimball influenced him to become a lawyer, and later the attorney general of Idaho, to help …

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Effect Of Initial Surface Treatment Timing On Chloride Concentrations In Concrete Bridge Decks, Aimee Worthen Birdsall Jan 2007

Effect Of Initial Surface Treatment Timing On Chloride Concentrations In Concrete Bridge Decks, Aimee Worthen Birdsall

Theses and Dissertations

Bridge engineers and managers in coastal areas and cold regions frequently specify the application of surface treatments on concrete bridge decks as barriers against chloride ingress. In consideration of concrete cover thickness and the presence of stay-in-place metal forms (SIPMFs), the objective of this research was to determine the latest timing of initial surface treatment applications on concrete bridge decks subjected to external chloride loading before chlorides accumulate in sufficient quantities to initiate corrosion during the service life of the deck. Chloride concentration data for this research were collected from 12 concrete bridge decks located within the I-215 corridor in …

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Banda Forearc Metamorphic Rocks Accreted To The Australian Continental Margin: Detailed Analysis Of The Lolotoi Complex Of East Timor, Carl Eldon Standley Jan 2007

Banda Forearc Metamorphic Rocks Accreted To The Australian Continental Margin: Detailed Analysis Of The Lolotoi Complex Of East Timor, Carl Eldon Standley

Theses and Dissertations

Petrologic, structural and age investigations of the Lolotoi Complex of East Timor indicate that it is part of a group of thin metamorphic klippen found throughout the region that were detached from the Banda forearc and accreted to the NW Australian continental margin during Late Miocene to Present arc-continent collision. Metamorphic rock types are dominated by (in order of greatest to least abundance), greenschist, graphitic phyllite, quartz-mica schist, amphibolite and pelitic schist. Mineral, whole rock, and trace element geochemical analyses of metabasites indicate that protolith compositions are consistent with tholeiitic basalt and basaltic andesite with mixed MORB and oceanic arc …

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The Influence Of The First World War On The Church Of Jesus Christ Of Latter-Day Saints, James I. Mangum Jan 2007

The Influence Of The First World War On The Church Of Jesus Christ Of Latter-Day Saints, James I. Mangum

Theses and Dissertations

The Church of Jesus Christ of Latter-day Saints and its membership felt a substantial impact from the effects of World War I. Although other authors have attempted to bring forward the events of these hostilities, they are few in number and the research in this area is small. Additionally, few have focused on the effects of the war on the Church. In order to increase the understanding of this influence, this work examines how the First World War affected the lives of Latter-day Saints both during and after the conflict. The entire world felt the effects of the world war …

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An Investigation Of Methods To Homogeneously Entrain And Suspend Abrasive Particles In A Low Pressure Dental Water Jet, Michael Sean Grygla Jan 2007

An Investigation Of Methods To Homogeneously Entrain And Suspend Abrasive Particles In A Low Pressure Dental Water Jet, Michael Sean Grygla

Theses and Dissertations

During the past several decades, the water jet cutting concept has developed from a novel concept into a well-accepted machine cutting tool. With the addition of abrasive particles and the improvement of high pressure pumps, the water jet stream is currently capable of cutting through metal, concrete, and composite materials. Water jet systems have been utilized at a wide range of different pressures. Research performed at Brigham Young University has revealed that low pressure water jets have the ability to cut human teeth. Experiments have shown that when abrasive particles are added to the water jet stream, an greater amount …

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Neurophysiologic And Behavioral Measures Of Phonetic Perception In Adult Second Language Speakers Of Spanish, Jaden D. Hellewell Jan 2007

Neurophysiologic And Behavioral Measures Of Phonetic Perception In Adult Second Language Speakers Of Spanish, Jaden D. Hellewell

Theses and Dissertations

Infants 6-8 months old are able to identify nearly every speech sound contrast on which they have been tested, regardless of whether that contrast represents an across-category (two different phonemes) phonetic change in their native language or not. A child's ability to identify non-native consonant contrasts greatly diminishes by 11-12 months of age. The present study examined speech sound discrimination in three groups of listeners. Adult second language (L2) listeners of Spanish were compared with native English listeners with no knowledge of Spanish and native Mexican listeners to determine if they would show the ability to discriminate phonetic distinctions that …

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An Analysis Of The Subjective Socioeconomic Scale Among Hispanic Immigrants And Caucasians, Mathew Glen Bowden Jan 2007

An Analysis Of The Subjective Socioeconomic Scale Among Hispanic Immigrants And Caucasians, Mathew Glen Bowden

Theses and Dissertations

Subjective socioeconomic status (SES) has previously been shown to be correlated with a large number of health measures. In this study, the subjective SES measure is modified and translated to measure childhood SES. The subjective SES scale is examined in a participant's hometown, community, and nation. Both an immigrant Hispanic and a Caucasian sample were studied (31 Hispanic males; 42 Hispanic females; 38 Caucasian males, 40 Caucasians females). Childhood SES was the most significant predictor of self-reported health in both sample groups.

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One Problem, Two Contexts, Danielle L. Gigger Jan 2007

One Problem, Two Contexts, Danielle L. Gigger

Theses and Dissertations

In this study, a group of students were presented with two mathematically isomorphic problems but in radically different contexts. Analysis of their thinking and reasoning as they worked to solve and explain each problem demonstrates that the thinking and reasoning that emerged in each problem responded to clear purposes that the problems elicited in these students. The first problem was posed in a context that relied on experience and intuition rather than a formal mathematical description. The second problem was posed in a formal, set-theoretic context. While the analysis offered here reveals similarities in the students' final reasoning in the …

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System For Collision Detection Between Deformable Models Built On Axis Aligned Bounding Boxes And Gpu Based Culling, David Owen Tuft Jan 2007

System For Collision Detection Between Deformable Models Built On Axis Aligned Bounding Boxes And Gpu Based Culling, David Owen Tuft

Theses and Dissertations

Collision detection between deforming models is a difficult problem for collision detection systems to handle. This problem is even more difficult when deformations are unconstrained, objects are in close proximity to one another, and when the entity count is high. We propose a method to perform collision detection between multiple deforming objects with unconstrained deformations that will give good results in close proximities. Currently no systems exist that achieve good performance on both unconstrained triangle level deformations and deformations that preserve edge connectivity. We propose a new system built as a combination of Graphics Processing Unit (GPU) based culling and …

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Eliminating Redundant And Less-Informative Rss News Articles Based On Word Similarity And A Fuzzy Equivalence Relation, Ian Garcia Jan 2007

Eliminating Redundant And Less-Informative Rss News Articles Based On Word Similarity And A Fuzzy Equivalence Relation, Ian Garcia

Theses and Dissertations

The Internet has marked this era as the information age. There is no precedent in the amazing amount of information, especially network news, that can be accessed by Internet users these days. As a result, the problem of seeking information in online news articles is not the lack of them but being overwhelmed by them. This brings huge challenges regarding processing of online news feeds, i.e., how to determine which news article is important, how to determine the quality of each news article, and how to filter irrelevant and redundant information. In this thesis, we propose a method for filtering …

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An Improved Model For Calculating Heats Of Dilution And Equilibrium Constants For High Temperature Aqueous Electrolyte Solutions, Xiaoyun Lin Jan 2007

An Improved Model For Calculating Heats Of Dilution And Equilibrium Constants For High Temperature Aqueous Electrolyte Solutions, Xiaoyun Lin

Theses and Dissertations

At high temperatures, the properties of aqueous electrolyte systems differ markedly from those at 25°C. For mixed-electrolyte dilute solutions at high temperatures, the degree of ion-association is sufficiently large that the association equilibrium must be incorporated in any model describing the solutions. These association reactions usually do not occur to a measurable extent at room temperature. Oscarson and co-workers have designed a correlation model based on the excess Gibbs energy which can correlate log K and ∆H values as well as the heats of dilution for aqueous electrolyte systems as a function of temperature (T) and ionic strength (I) from …

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Implicit Affinity Networks, Matthew Scott Smith Jan 2007

Implicit Affinity Networks, Matthew Scott Smith

Theses and Dissertations

Although they clearly exist, affinities among individuals are not all easily identified. Yet, they offer unique opportunities to discover new social networks, strengthen ties among individuals, and provide recommendations. We propose the idea of Implicit Affinity Networks (IANs) to build, visualize, and track affinities among groups of individuals. IANs are simple, interactive graphical representations that users may navigate to uncover interesting patterns. This thesis describes a system supporting the construction of IANs and evaluates it in the context of family history and online communities.

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Is Marriage Education Effective? A Meta-Analytic Review Of Marriage Education Programs, Elizabeth Brinton Fawcett Jan 2007

Is Marriage Education Effective? A Meta-Analytic Review Of Marriage Education Programs, Elizabeth Brinton Fawcett

Theses and Dissertations

In the past few decades, several meta-analytic studies have attempted to answer the question: Is marriage education effective (Carroll & Doherty, 2003; Halford, Markman, Kline & Stanley, 2003; Reardon-Anderson, Stagner, Macomber, & Murray, 2004)? However, previous meta-analytic studies have been somewhat limited in their conclusions because they have reviewed a narrow portion of the marriage education spectrum (e.g. premarital education only, Carroll & Doherty, 2003), because they focused only on one particular program (e.g, Couples Communication, Butler & Wampler, 1999), because they failed to differentiate marital therapy from marital education programs (Reardon-Anderson et al., 2005), or because they excluded much …

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High-Frequency Ultrasound Drug Delivery And Cavitation, Mario Alfonso Diaz Jan 2007

High-Frequency Ultrasound Drug Delivery And Cavitation, Mario Alfonso Diaz

Theses and Dissertations

The viability of a drug delivery system which encapsulates chemotherapeutic drugs (Doxorubicin) in the hydrophobic core of polymeric micelles and triggers release by ultrasound application was investigated at an applied frequency of 500 kHz. The investigation also included elucidating the mechanism of drug release at 70 kHz, a frequency which had previously been shown to induce drug release. A fluorescence detection chamber was used to measure in vitro drug release from both Pluronic and stabilized micelles and a hydrophone was used to monitor bubble activity during the experiments. A threshold for release between 0.35 and 0.40 in mechanical index was …

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A Numerical Vortex Approach To Aerodynamic Modeling Of Suav/Vtol Aircraft, Douglas F. Hunsaker Jan 2007

A Numerical Vortex Approach To Aerodynamic Modeling Of Suav/Vtol Aircraft, Douglas F. Hunsaker

Theses and Dissertations

A combined wing and propeller model is presented as a low-cost approach to preliminary modeling of slipstream effects on a finite wing. The wing aerodynamic model employs a numerical lifting-line method utilizing the 3D vortex lifting law along with known 2D airfoil data to predict the lift distribution across a wing for a prescribed upstream flowfield. The propeller/slipstream model uses blade element theory combined with momentum conservation equations. This model is expected to be of significant importance in the design of tail-sitter vertical take-off and landing (VTOL) aircraft, where the propeller slipstream is the primary source of air flow past …

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Skuery: Manipulation Of S-Expressions Using Xquery Techniques, Kevin Burke Tew Jan 2007

Skuery: Manipulation Of S-Expressions Using Xquery Techniques, Kevin Burke Tew

Theses and Dissertations

Data query operations inside programming languages presently perform their functions through the use of domain-specific, declarative expressions and by way of course-grain, API library calls. These methods of operation are practiced by relational databases as well as semistructured XML data stores. Layers of translation, which are necessary to transform data and instructions from the domain of programming languages to data query systems, negtatively effect the performance of data query operations. Skuery resolves this impedance by adopting XML as a native data type with a native representation (SXML). Likewise, query operations are defined in a general purpose programming language (Scheme in …

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Massacring The Truth, Craig L. Foster Jan 2007

Massacring The Truth, Craig L. Foster

Review of Books on the Book of Mormon 1989–2011

Review of Christopher Cain (producer). September Dawn and Review of Carole Whang Schutter. September Dawn.

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The Study Of Mormonism: A Growing Interest In Academia, M. Gerald Bradford Jan 2007

The Study Of Mormonism: A Growing Interest In Academia, M. Gerald Bradford

Review of Books on the Book of Mormon 1989–2011

No abstract provided.

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New Religious Movements And Orthodoxy: The Challenge To The Religious Mainstream, Terryl L. Givens Jan 2007

New Religious Movements And Orthodoxy: The Challenge To The Religious Mainstream, Terryl L. Givens

Review of Books on the Book of Mormon 1989–2011

No abstract provided.

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The Sperry Symposium And The New Testament, Kevin L. Barney Jan 2007

The Sperry Symposium And The New Testament, Kevin L. Barney

Review of Books on the Book of Mormon 1989–2011

Review of Frank F. Judd Jr. and Gaye Strathearn, eds. Sperry Symposium Classics: The New Testament. and Review of Kent P. Jackson and Frank F. Judd Jr., eds. How the New Testament Came to Be: The 35th Annual Brigham Young University Sidney B. Sperry Symposium.

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Modeling Hydrological Response Of The Upper Suriname River Basin To Climate Change Jan 2007

Modeling Hydrological Response Of The Upper Suriname River Basin To Climate Change

Journal of Spatial Hydrology

The goal of this paper is to assess the impact of future climate change on the hydrological regime of the tropical Upper Suriname river basin (7,860 km2) located in Suriname. GCM based climate scenarios from the MAGICC/SCENGEN model and 14 hypothetical climate scenarios are used to examine potential changes in water balance components in the study area. A physically-based distributed hydrological model, WetSpa, and Geographic Information Systems (GIS) are used to simulate the historical and future hydrological conditions. The evaluation results indicate that the model has a relatively high confidence (model bias C1 is 0.046 and the model …

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The Theology Of Memory: Mormon Historical Consciousness, Steven L. Olsen Jan 2007

The Theology Of Memory: Mormon Historical Consciousness, Steven L. Olsen

Review of Books on the Book of Mormon 1989–2011

No abstract provided.

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Finally!, Kevin L. Barney Jan 2007

Finally!, Kevin L. Barney

Review of Books on the Book of Mormon 1989–2011

Review of Richard Neitzel Holzapfel, Eric D. Huntsman, and Thomas A. Wayment. Jesus Christ and the World of the New Testament; An Illustrated Reference for Latter-day Saints.

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Assessing Aquifer Vulnerability To Arsenic Pollution Using Drastic And Gis Of North Bengal Plain: A Case Study Of English Bazar Block, Malda District, West Bengal, India Jan 2007

Assessing Aquifer Vulnerability To Arsenic Pollution Using Drastic And Gis Of North Bengal Plain: A Case Study Of English Bazar Block, Malda District, West Bengal, India

Journal of Spatial Hydrology

Geographic Information System (GIS) was utilized to apply a modified DRASTIC method to assess the aquifer vulnerability to pollution of English Bazar Block of Malda District, West Bengal, India. In the western, central and southern parts of the study area the aquifer is prone to contamination. Therefore, in these regions pesticides, which may contain arsenic or arsenic rich groundwater, should not be used in irrigated land or mango orchards. In order to understand the reliability of the aquifer vulnerability, sensitivity analysis was carried out. This analysis indicates that in 62% of the area the vulnerability classes correspond to the present …

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Application Of An Artificial Neural Network To Estimate Groundwater Level Fluctuation Jan 2007

Application Of An Artificial Neural Network To Estimate Groundwater Level Fluctuation

Journal of Spatial Hydrology

This paper examines and compares the capability of an artificial neural network (ANN) with five different backpropagation (BP) algorithms, namely Gradient descent with momentum (GDM), Gradient descent with adaptive learning rate and momentum (GDX), The Fletcher-Reeves Conjugate gradient (CGF), Quasi-Newton (BGF) and Levenberg-Marquardt (LM), and a radial basis function (RBF) architecture for estimating groundwater level fluctuation (GLF). MATLAB was used to develop the ANN programming. Five-daily measurements of GLF in an observation well provided the data for analyzing the model. An input model using six time lags to estimate actual GLF and 10 hidden nodes gave an optimum result. In …

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William Of Auvergne And Popular Demonology, Thomas De Mayo Jan 2007

William Of Auvergne And Popular Demonology, Thomas De Mayo

Quidditas

Theologian and bishop of Paris during St. Louis’ early reign, William of Auvergne (d. 1249) aimed in his life and writings to combat the myriad threats he perceived as facing Christianity. The early thirteenth century saw many potential competitors to official doctrines concerning the natural and supernatural worlds—Arabic philosophy imported into the universities, heretical attacks on the institutional church, and persistent folk beliefs and practices. William attributed these challenges to an underlying demonic conspiracy directed against humankind. This paper examines William’s treatment of popular beliefs on the Wild Hunt, a mysterious congregation of spirits, and related beliefs about female spirits …

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Full Issue Jan 2007

Full Issue

BYU Asian Studies Student Journal

No abstract provided.

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Writing Over Silence: The Asian-American In-Between Identity, Amy Scott Jan 2007

Writing Over Silence: The Asian-American In-Between Identity, Amy Scott

BYU Asian Studies Student Journal

My daily routine is pure ritual and thus pure theatre. A routinely perfect production of a comfortable unwritten script: stage dark, save for a dim morning light; spot on tousseled black hair, white pillow, and a blanket nest. Wake up, pad into the bathroom; mise-en-scène a student’s sanctuary. In the bathroom, suit up: costume, makeup/mask, deliberately casual—as if any day could become a beach day. Flip on Elvis and dance while pouring milk onto cold cereal. The door opens, and the play begins en force.

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The Doctrine Of Deification In The Greek Patristic Tradition. By Norman Russell, Jordan Vajda Jan 2007

The Doctrine Of Deification In The Greek Patristic Tradition. By Norman Russell, Jordan Vajda

BYU Studies

Norman Russell. The Doctrine of Deification in the Greek Patristic Tradition. Oxford: Oxford University Press, 2004

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