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Flight Testing Small, Electric Powered Unmanned Aerial Vehicles, Jon N. Ostler Mar 2006

Flight Testing Small, Electric Powered Unmanned Aerial Vehicles, Jon N. Ostler

Theses and Dissertations

Flight testing methods are developed to find the drag polar for small UAVs powered by electric motors with fixed-pitch propellers. Wind tunnel testing was used to characterize the propeller-motor efficiency. The drag polar was constructed using data from flight tests. The proposed methods were implemented for a small UAV. A drag polar was found for this aircraft with CDo equal to 0.021, K1 equal to 0.229, and K2 equal to -0.056. This drag polar was then used to find the following performance parameters; maximum velocity, minimum velocity, velocity for maximum range, velocity for maximum endurance, maximum rate of climb, maximum …

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The Dominant Listening Strategy Of Low-Proficiency Level Learners Of Mandarin Chinese: Bottom-Up Processing Or Top-Down Processing, Chao-Chi Yang Mar 2006

The Dominant Listening Strategy Of Low-Proficiency Level Learners Of Mandarin Chinese: Bottom-Up Processing Or Top-Down Processing, Chao-Chi Yang

Theses and Dissertations

Listening comprehension has been the forgotten skill in second language acquisition. However, in recent years, more and more studies have focused on listening comprehension and now acknowledge its importance in language acquisition. Empirical studies have explored how listeners use the two main listening processes (top-down processing and bottom-up processing). In this study, 31 low-proficiency level Mandarin Chinese as a foreign language (CFL) learners from Brigham Young University took the Chinese Computer Adaptive Language Test (CCALT) and listened to four listening passages, measured by idea unit analysis and local and global question types. The data from these measurements suggest that low-proficiency …

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Analysis Of Viscous Drag Reduction And Thermal Transport Effects For Microengineered Ultrahydrophobic Surfaces, Jason W. Davies Mar 2006

Analysis Of Viscous Drag Reduction And Thermal Transport Effects For Microengineered Ultrahydrophobic Surfaces, Jason W. Davies

Theses and Dissertations

One approach recently proposed for reducing the frictional resistance to liquid flow in microchannels is the patterning of micro-ribs and cavities on the channel walls. When treated with a hydrophobic coating, the liquid flowing in the microchannel wets only the top surfaces of the ribs, and does not penetrate into the cavities, provided the pressure is not too high. The net result is a reduction in the surface contact area between channel walls and the flowing liquid. For micro-ribs and cavities that are aligned normal to the channel axis (principal flow direction), these micropatterns form a repeating, periodic structure. This …

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Soil Stable Carbon Isoptope Analysis Of Landscape Features At Aguateca, Guatemala, David R. Wright Mar 2006

Soil Stable Carbon Isoptope Analysis Of Landscape Features At Aguateca, Guatemala, David R. Wright

Theses and Dissertations

The ancient Maya of the Classic period (1700-1050 B.P.) relied on maize agriculture to support their populations. The agricultural systems they employed to produce that maize varied in form and degree of intensity, with more productive forms of agriculture needed in the Late Classic period (1350-1050 B.P.) to sustain the peaking population. It is likely that the ancient systems of production agriculture contributed to environmental degradation that in turn contributed to the pressures that culminated in the collapse of the civilization. In this study, stable carbon isotope ratios contained in the soil organic matter were used to further investigate ancient …

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Mineral-Scale Sr Isotopic Study Of Plagioclase In The Mafic Dikes Of The North American Wall And The Diorite Of The Rockslides, Yosemite Valley, California., Wendy Rae Nelson Mar 2006

Mineral-Scale Sr Isotopic Study Of Plagioclase In The Mafic Dikes Of The North American Wall And The Diorite Of The Rockslides, Yosemite Valley, California., Wendy Rae Nelson

Theses and Dissertations

The North American Wall mafic dikes and the diorite of the Rockslides mafic complex in the intrusive suite of Yosemite Valley show evidence of mixing with their host granites as well as with earlier components. Whole rock major element variation diagrams indicate the mafic rocks mixed with a more silicic component, but extrapolating to the silica end member does not yield the same result with each element. Trace element concentrations show a wide variation in concentration of Cr and Ni, with two samples showing enrichment in Cr (>300 ppm) and Ni (~44 ppm) compared to other samples (Cr =13-94 …

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The Role Of Pax3 In Neuronal Differentiation Of The Ophthalmic (Opv) Trigeminal Placode And Neural Tube During Chicken Embryonic Development, James R. Bradshaw Mar 2006

The Role Of Pax3 In Neuronal Differentiation Of The Ophthalmic (Opv) Trigeminal Placode And Neural Tube During Chicken Embryonic Development, James R. Bradshaw

Theses and Dissertations

Pax3 has been used as a valuable marker in research aimed at understanding tissue interactions involved in trigeminal ophthalmic (opV) placode development. While Pax3 expression coincides with opV neuron specification, the function of Pax3 in these cells has not previously been investigated. Splotch mutant mice (which lack Pax3) have a reduced trigeminal ganglion; however it is not clear whether this reduction is due to neural crest or placode cells. We have used electroporation in the chick model system to block or ectopically express Pax3 at key times in opV placode development. Using several markers of placode cell differentiation, we have …

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What Does It Mean To Preservice Mathematics Teachers To Anticipate Student Responses?, Matthew M. Webb Mar 2006

What Does It Mean To Preservice Mathematics Teachers To Anticipate Student Responses?, Matthew M. Webb

Theses and Dissertations

Lesson study is a form of professional development for teachers adopted in recent years from Japan. Introducing lesson study to U.S. teachers and researchers has been the focus of most of the literature on this subject. Much of the literature outlines how lesson study works and describes its essential features. One of the features of lesson study is anticipating student responses, also known as anticipating student thinking. Anticipating student responses is passingly described in lesson study literature. This research was conducted to understand what it means to anticipate student responses for preservice mathematics teachers in a lesson study group. Lesson …

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Membrane-Based Protein Preconcentration Microfluidic Devices, Yi Li Mar 2006

Membrane-Based Protein Preconcentration Microfluidic Devices, Yi Li

Theses and Dissertations

Interest in microchip capillary electrophoresis (CE) is growing due to the rapid analysis times provided and small sample input requirements. However, higher-concentration samples are typically needed because of the small (~pL) detection volumes in these devices. I have made membrane-based protein preconcentration systems in capillary and microchip designs to increase the detectability of low-concentration biological samples. A photopolymerized ion-permeable membrane interfaced with a microchannel in poly(methyl methacrylate) (PMMA) formed the preconcentrator. When a voltage was applied between the sample reservoir and the ionically conductive membrane in a capillary-based system, R-phycoerythrin was concentrated more than 1,000 fold, as determined by laser-induced …

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Vocabulary Acquisition In Cfl (Chinese As A Foreign Language) Contexts: A Correlation Of Performance And Strategy Use, Ping Mcewen Mar 2006

Vocabulary Acquisition In Cfl (Chinese As A Foreign Language) Contexts: A Correlation Of Performance And Strategy Use, Ping Mcewen

Theses and Dissertations

The present study was anchored in an inquiry of second language Chinese vocabulary acquisition and learning Chinese as a foreign language. It investigated character density in L2 Chinese vocabulary recognition and production: low character density recognition, high character density recognition, low character density production, and high character density production. It also investigated the effectiveness of strategies that students perceived when faced with learning Chinese. The data was collected from the Chinese program at Brigham Young University across one semester level. Along with this data, students' vocabulary achievement test scores were collected. Descriptive and non-parametric statistics were used. The one-way ANOVA …

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A Multidisciplinary Approach To Reservoir Characterization Of The Coastal Entrada Erg-Margin Gas Play, Utah, Will D. Monn Mar 2006

A Multidisciplinary Approach To Reservoir Characterization Of The Coastal Entrada Erg-Margin Gas Play, Utah, Will D. Monn

Theses and Dissertations

World-class outcrops of an outermost erg-margin can be observed within the Middle Jurassic Entrada Sandstone near Capitol Reef National Park, Utah. These erg-margin deposits contain isolated reservoir quality sandstone bodies that transition into a muddy tidal flat facies. These high quality reservoirs are dominated by eolian-influenced facies interbedded with sandy interdune facies. They are sealed vertically by muddy and silty facies of associated tidal flat deposits that act as excellent stratigraphic traps in the subsurface. A variety of approaches were used to characterize these Entrada erg-margin reservoirs including: annotated panoramas of outcrops, measured sections, scintillometer measurements of field sections, facies …

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The Relationship Between Social Behaviors And Working Memory In School-Age Children With Language Impairment, Melanie Diane Javid Mar 2006

The Relationship Between Social Behaviors And Working Memory In School-Age Children With Language Impairment, Melanie Diane Javid

Theses and Dissertations

Children with language impairment (LI) have notable social problems (Brinton & Fujiki, 2004). Research has shown that children with LI often have deficits in working memory (Kirchner & Klatsky, 1985; Stark, Poppen, & May, 1987). The relationship between working memory and social behaviors has not been clearly defined. This study examined this relationship in children with LI and typical age-matched peers by asking participants to repeat nine nonwords and correlating these results with social behaviors as rated by teachers. The Teacher Behavior Rating Scale (TBRS; Hart and Robinson, 1996) was used to compare social behaviors of 19 school-age children with …

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The Effect Of Repeated Textual Encounters And Pictorial Glosses Upon Acquiring Additional Word Senses, Michael S. Hilmo Mar 2006

The Effect Of Repeated Textual Encounters And Pictorial Glosses Upon Acquiring Additional Word Senses, Michael S. Hilmo

Theses and Dissertations

This study investigated the effects of multiple textual encounters of words and textual encounters of words supplemented with pictorial glosses upon the ability of a learner of French to infer additional word senses—senses of target words that were not previously encountered. Twenty-nine participants were randomly divided into two groups, Groups A and B, and were subjected to two treatments, one in which the subjects encountered target words textually twice (Repeated Textual Encounters, RTE) and one in which the subjects encountered target words once textually and once pictorially (Pictorial Encounter, PE). Before the administration of the two vocabulary-learning treatments the participants …

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The Dogma Of The 30 Meter Riparian Buffer: The Case Of The Boreal Toad (Bufo Boreas Boreas), Michael C. Goates Mar 2006

The Dogma Of The 30 Meter Riparian Buffer: The Case Of The Boreal Toad (Bufo Boreas Boreas), Michael C. Goates

Theses and Dissertations

We tested the adequacy of standard 30 m riparian buffers for semi-aquatic vertebrate species, using the boreal toad (Bufo boreas boreas) as an example. We monitored toad populations in south-central Utah using radio telemetry during the summers of 2003 and 2004. We found 30 m buffers inadequate for protecting boreal toads and suggest this is likely true for other species as well. Managers must consider several factors when constructing buffers: (1) Buffer requirements may vary by time of year. While we located toads most often in wet habitats, toads commonly utilized upland habitats in late summer, occasionally at distances greater …

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Two Dimensional Friction Stir Welding Model With Experimental Validation, Charles Blake Owen Mar 2006

Two Dimensional Friction Stir Welding Model With Experimental Validation, Charles Blake Owen

Theses and Dissertations

The performance of a coupled viscoplastic model of FSW has been evaluated over a variety of tool RPMs and feed rates. Initial results suggested that further optimization of the material parameters and an additional ability to model the thermal recovery of the material would improve the overall performance of the model. Therefore, an experimental/numeric approach was taken to improve and quantitatively compare the performance of the model based upon the thermal profile of the workpiece. First, an experimental method for obtaining real-time temperature measurements during Friction Stir Processing (FSP) of 304L Stainless Steel was developed. The focus of the method …

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The Finest Entertainment: Conscious Observation On Film In Adaptations Of Henry James' The Portrait Of A Lady, The Wings Of The Dove, And Washington Square, Rachael Decker Bailey Mar 2006

The Finest Entertainment: Conscious Observation On Film In Adaptations Of Henry James' The Portrait Of A Lady, The Wings Of The Dove, And Washington Square, Rachael Decker Bailey

Theses and Dissertations

The works of Henry James are renowned for their dense sub-text and the manner in which he leaves his reader to elucidate much of his meaning. In the field of adaptation theory, therefore, James presents somewhat of a problem for the film adaptor: how does one convey on screen James' delicate implications, which are formative to the text without actually existing on the printed page? This project not only works to answer that question, but it also addresses a more serious question: what does adaptation have to offer to the student of literature? In the case of Henry James, the …

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Unresolved Problems Involving The Hydrogeology And Sequence Stratigraphy Of The Wasatch Plateau Based On Mapping Of The Wattis 7.5 Minute Quadrangle, Carbon And Emery Counties, Utah: Insights Gained From A New Geologic Map, David O. Alderks Mar 2006

Unresolved Problems Involving The Hydrogeology And Sequence Stratigraphy Of The Wasatch Plateau Based On Mapping Of The Wattis 7.5 Minute Quadrangle, Carbon And Emery Counties, Utah: Insights Gained From A New Geologic Map, David O. Alderks

Theses and Dissertations

The Wattis 7.5 Minute Quadrangle is located in central Utah, in the transition zone between the Basin and Range province and the Colorado plateau. Two small grabens, located in the quadrangle, are the easternmost evidence of Basin and Range faulting. Sedimentary units exposed are mainly Cretaceous in age and deposited in the Western Cretaceous Interior Seaway. This area is of economical importance due to its large coal deposits, coal bed methane, and groundwater. The Wattis Quadrangle provided an ideal opportunity to test, at a small scale, the applicability of a new groundwater model for stratified mountainous terranes. Water samples had …

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The Violation Of Bell's Inequality In A Deterministic But Nonlocal Model, Stephanie Allred Magleby Mar 2006

The Violation Of Bell's Inequality In A Deterministic But Nonlocal Model, Stephanie Allred Magleby

Theses and Dissertations

This thesis investigates the violation of Bell's Inequality through the use of nonlocal measurement schemes as encapsulated in a quasi-deterministic toy model. This toy model, called the Q Box, is reminiscent of Mermin's Box in that it describes a system that appears to be deterministic yet produces the statistics of a quantum type system. [1] The workings of the Q Box are detailed both as a thought experiment and as a computer simulation. Nonlocal measurement protocols similar to those which generate a violation of Bell's Inequality in the Q Box are also applied to Mermin's Box, with comparable results. [1] …

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Parowan Pottery And Fremont Complexity: Late Formative Ceramic Production And Exchange, Christopher N. Watkins Mar 2006

Parowan Pottery And Fremont Complexity: Late Formative Ceramic Production And Exchange, Christopher N. Watkins

Theses and Dissertations

The Fremont, a Formative culture located in the Eastern Great Basin and Colorado Plateau, have been primarily studied from an ecological perspective. This research addresses issues that are not ecological, the organization of production and exchange of ceramic vessels. Following criteria suggested by Brown et al. (1990), I argue that the following need to be addressed prior to a useful discussion of intergroup trade: the source of the raw materials of the exchanged objects, the associated pattern of distribution, the relative value of the objects, and their context of manufacture, use, and consumption. I specifically address three of these issues …

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Surface Realization Using A Featurized Syntactic Statistical Language Model, Thomas L. Packer Mar 2006

Surface Realization Using A Featurized Syntactic Statistical Language Model, Thomas L. Packer

Theses and Dissertations

An important challenge in natural language surface realization is the generation of grammatical sentences from incomplete sentence plans. Realization can be broken into a two-stage process consisting of an over-generating rule-based module followed by a ranker that outputs the most probable candidate sentence based on a statistical language model. Thus far, an n-gram language model has been evaluated in this context. More sophisticated syntactic knowledge is expected to improve such a ranker. In this thesis, a new language model based on featurized functional dependency syntax was developed and evaluated. Generation accuracies and cross-entropy for the new language model did not …

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Education In Transition: Church And State Relationships In Utah Education, 1888-1933, Scott Clair Esplin Mar 2006

Education In Transition: Church And State Relationships In Utah Education, 1888-1933, Scott Clair Esplin

Theses and Dissertations

Utah's current educational systems were largely shaped by a transitional era that occurred during the late nineteenth and early twentieth centuries. A time when the region itself moved from territorial to state status, the dominant religion in the area, The Church of Jesus Christ of Latter-day Saints (LDS Church), likewise changed in its role in Utah society. Previously dominating most aspects of life, the Church was forced to reevaluate its place in society due to greatly increased secular power and context. Educational changes, as harbingers of larger societal shifts, are illustrative of such paradigm changes. During the four decade period …

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A Meaning-Based Instruction To Enhance Literacy Learning In A Dual-Language Kindergarten Classroom, Megan Melissa Fife Mar 2006

A Meaning-Based Instruction To Enhance Literacy Learning In A Dual-Language Kindergarten Classroom, Megan Melissa Fife

Theses and Dissertations

Concerns among educators continue to grow with the increased enrollment of Second Language Learners (SLL) in classrooms throughout the United States. This influx has stressed the boundaries of current methods of literacy instruction, which are not designed to meet the needs of these at-risk students. Literacy instructional methods need to be remediated through early intervention, followed by effective literacy instruction that is designed to meet the specific needs of SLL. Effective literacy instruction overcomes differences in culture and background by using meaning-based instruction coupled with engaging and varied contexts. This study evaluated the effectiveness of incorporating meaning-based instructional activities into …

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The Personal Impact On Female Therapists From Working With Sexually-Abused Children, Kinsey Drouet Pistorius Mar 2006

The Personal Impact On Female Therapists From Working With Sexually-Abused Children, Kinsey Drouet Pistorius

Theses and Dissertations

Although previous research has established that therapists who work with sexually-abused children experience symptoms of vicarious trauma, few studies have addressed the process by which the therapist is affected. In order to understand therapists' personal experiences and how working with sexually-abused children impacts them in their personal lives, the researcher interviewed therapists who were currently working with this specific population. Data analysis was completed by using ethnographic research methods and three major themes emerged during the interviews. The first theme included the "job characteristics" inherent in working with sexually-abused children. This theme refers to how the therapists entered the field …

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Design And Measurement Of A Real-Time Peer-To-Peer Game, Michael D. Simonsen Mar 2006

Design And Measurement Of A Real-Time Peer-To-Peer Game, Michael D. Simonsen

Theses and Dissertations

Currently, multiplayer online games use the client-server architecture which is very resource intensive, expensive, and time consuming. Peer-to-peer protocols are a less resource intensive alternative to the client-server model. We implement a peer-to-peer protocol called NEO in a multiplayer game and run experiments in a lab setting and over the Internet. These experiments show us that NEO is able to run a smooth playable game, with low unused updates and low location error. This happens as long as the arrival delay is long enough to allow updates to arrive in the given time limit and the round length is short …

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Modeling The Performance Of A Baseball Player's Offensive Production, Michael Ross Smith Mar 2006

Modeling The Performance Of A Baseball Player's Offensive Production, Michael Ross Smith

Theses and Dissertations

This project addresses the problem of comparing the offensive abilities of players from different eras in Major League Baseball (MLB). We will study players from the perspective of an overall offensive summary statistic that is highly linked with scoring runs, or the Berry Value. We will build an additive model to estimate the innate ability of the player, the effect of the relative level of competition of each season, and the effect of age on performance using piecewise age curves. Using Hierarchical Bayes methodology with Gibbs sampling, we model each of these effects for each individual. The results of the …

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Automatic Geometric Data Migration Throughout Views Of A Model Fidelity Family, Hans L. Soderquist Mar 2006

Automatic Geometric Data Migration Throughout Views Of A Model Fidelity Family, Hans L. Soderquist

Theses and Dissertations

Changes in geometric model parameters are constant throughout the design process. Each group in an organization needs different model information at varying times during the design process. As a result many different models of the same part or assembly arise for the needs and use of each group in each design phase (from conceptual design to full product definition). When one group makes changes to a model, those changes need to be reflected in all of the models which describe the product in all groups and design phases in order for those changes to be verified against all design criteria …

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Medium Access Control And Networking Protocols For The Intra-Body Network, Eric Thomas Stucki Mar 2006

Medium Access Control And Networking Protocols For The Intra-Body Network, Eric Thomas Stucki

Theses and Dissertations

Biomedical applications offer an exciting growth opportunity for wireless sensor networks. However, radio frequency communication is problematic in hospital environments that are susceptible to interference in the industrial, scientific, and medical (ISM) bands. Also, RF is inherently insecure as eavesdroppers can easily pick up signals. The Intra-Body Network (IBNet) proposes a novel communication model for biomedical sensor networks. It seeks the convenience of wireless communication while avoiding interference and privacy concerns associated with RF. IBNet's solution is to utilize a subject's own body tissue as a transmission medium. Assuming that transmissions are contained within the body, IBNet solves otherwise complex …

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Colleges Explore Funding For Electronic Course Media, Susie Quartey, Copyright Clearance Center Mar 2006

Colleges Explore Funding For Electronic Course Media, Susie Quartey, Copyright Clearance Center

Faculty Publications

How to fund course materials for students is widely debated by campus administrators. This brief article interviews three copyright officials at different academic institutions who provide insight as to how electronic course materials are funded on their campuses and future funding options to be explored.

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Perceptions Of Parents, Self, And God As Predictive Of Sympton Severity Among Women Beginning Inpatient Treatment For Eating Disorders, Melissa H. Smith Feb 2006

Perceptions Of Parents, Self, And God As Predictive Of Sympton Severity Among Women Beginning Inpatient Treatment For Eating Disorders, Melissa H. Smith

Theses and Dissertations

The present investigation examined whether perceptions of parents, self, and God among women beginning inpatient treatment for eating disorders was predictive of symptom severity. The sample included 464 women (ages 12 to 56 years) beginning inpatient treatment for eating disorders at a private treatment facility, with the majority being Caucasian. Participants completed study measures as part of an initial battery of assessment measures, and included indices of eating disorder symptomology, parental relationships, self-esteem, and religious well-being. Multiple regression analysis showed perceptions of self and parents to be significant predictors, however perceptions of God failed to predict eating disorder symptom severity. …

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Variation Analysis Of Involute Spline Tooth Contact, Brian J. De Caires Feb 2006

Variation Analysis Of Involute Spline Tooth Contact, Brian J. De Caires

Theses and Dissertations

The purpose of this thesis is to provide an in-depth understanding of tooth engagement in splined couplings based on variations in clearances between mating teeth. It is standard practice to assume that 25-50% of the total spline teeth in a coupling are engaged due to variations from manufacture. Based on the assumed number of teeth engaged, the load capability of a splined coupling is determined. However, due to the variations in tooth geometry from manufacuture, the number of teeth actually engaged is dependent on the applied load and the tooth errors. The variations result in sequential tooth engagement with increasing …

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The Journey Home: A Root-Metaphor Analysis Of The 1840 Mormon Manchester Hymn Book, James N. Arrington Feb 2006

The Journey Home: A Root-Metaphor Analysis Of The 1840 Mormon Manchester Hymn Book, James N. Arrington

Theses and Dissertations

In 1840, apostle missionaries for the Church of Jesus Christ of Latter-day Saints compiled, printed, and began distributing a hymnbook that eventually would become the basis for all subsequent LDS hymnbooks published in English in the nineteenth and twentieth centuries. This thesis, as a contribution to the literature of communication, book history, and hymnology, as well as the intellectual and cultural history of the early years of the LDS Church, focuses on analyzing the poetry of the 1840 Mormon Manchester hymnbook. Using qualitative root-metaphor analysis, the author identified and analyzed expressions, supporting an emergent journey root-metaphor. He then divided the …

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