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Development Of Deployable Wings For Small Unmanned Aerial Vehicles Using Compliant Mechanisms, Steven D. Landon Jul 2007

Development Of Deployable Wings For Small Unmanned Aerial Vehicles Using Compliant Mechanisms, Steven D. Landon

Theses and Dissertations

Unmanned Air Vehicles (UAVs) have recently gained attention due to their increased ability to perform sophisticated missions with less cost and/or risk than their manned counterparts. This thesis develops approaches to the use of compliant mechanisms in the design of deployable wings for small UAVs. Although deployable wings with rigid-link mechanisms have been used in the past to maintain flight endurance while minimizing required storage volume, compliant mechanisms offer many advantages in manufacturability and potential space savings due to function sharing of components. A number of compliant, deployable wing concepts are generated and a classification system for them is formed. …

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Sensitivity To Distributional Assumptions In Estimation Of The Odp Thresholding Function, Wendy Jill Bunn Jul 2007

Sensitivity To Distributional Assumptions In Estimation Of The Odp Thresholding Function, Wendy Jill Bunn

Theses and Dissertations

Recent technological advances in fields like medicine and genomics have produced high-dimensional data sets and a challenge to correctly interpret experimental results. The Optimal Discovery Procedure (ODP) (Storey 2005) builds on the framework of Neyman-Pearson hypothesis testing to optimally test thousands of hypotheses simultaneously. The method relies on the assumption of normally distributed data; however, many applications of this method will violate this assumption. This thesis investigates the sensitivity of this method to detection of significant but nonnormal data. Overall, estimation of the ODP with the method described in this thesis is satisfactory, except when the nonnormal alternative distribution has …

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Friction Stir Welding Of High-Strength Automotive Steel, Eric Michael Olsen Jul 2007

Friction Stir Welding Of High-Strength Automotive Steel, Eric Michael Olsen

Theses and Dissertations

The following thesis is a study on the ability to create acceptable welds in thin-plate, ultra-high-strength steels (UHSS) by way of friction stir welding (FSW). Steels are welded together to create tailor-welded blanks (TWB) for use in the automotive industry. Dual Phase (DP) 590, 780, and 980 steel as well as Transformation-Induced Plasticity (TRIP) 590 steel with thicknesses ranging from 1.2 mm to 1.8 mm were welded using friction stir welding under a variety of processing conditions, including experiments with dissimilar thicknesses. Samples were tested under tensile loads for initial determination if an acceptable weld had been created. Acceptable welds …

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A Peculiar Place For The Peculiar Institution: Slavery And Sovereignty In Early Territorial Utah, Nathaniel R. Ricks Jul 2007

A Peculiar Place For The Peculiar Institution: Slavery And Sovereignty In Early Territorial Utah, Nathaniel R. Ricks

Theses and Dissertations

Between 1830 and 1844, the Mormons slightly shifted their position on African-American slavery, but maintained the middle ground on the issue overall. When Mormons began gathering to Utah in 1847, Southern converts brought their black slaves with them to the Great Basin. In 1852 the first Utah Territorial legislature passed “An Act in Relation to Service" that legalized slavery in Utah. This action was prompted primarily by the need to regulate slavery and contextualize its practice within the Mormon belief system. Ironically, had Congress known of Utah's slave population, it may have never granted Utah the power to legislate on …

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Beyond Fidelity: Teaching Film Adaptations In Secondary Schools, Nathan C. Phillips Jul 2007

Beyond Fidelity: Teaching Film Adaptations In Secondary Schools, Nathan C. Phillips

Theses and Dissertations

Although nearly every secondary school English teacher includes film as part of the English/language arts curriculum, there is, to this point, nothing published about effectively studying the relationship between film adaptations and their print source texts in secondary school. There are several important works that inform film study in secondary English classrooms. These include Alan Teasley and Ann Wilder's Reel Conversations; William Costanzo's Reading the Movies and his updated version, Great Films and How to Teach Them; and John Golden's Reading in the Dark. However, each of these mention adaptation briefly if at all. Rather, they approach film as a …

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Extensible Pre-Authentication In Kerberos, Phillip L. Hellewell Jul 2007

Extensible Pre-Authentication In Kerberos, Phillip L. Hellewell

Theses and Dissertations

Organizations need to provide services to a wide range of people, including strangers outside their local security domain. As the number of users grows larger, it becomes increasingly tedious to maintain and provision user accounts. It remains an open problem to create a system for provisioning outsiders that is secure, flexible, efficient, scalable, and easy to manage. Kerberos is a secure, industry-standard protocol. Currently, Kerberos operates as a closed system; all users must be specified upfront and managed on an individual basis. This paper presents EPAK (Extensible Pre-Authentication in Kerberos), a framework that enables Kerberos to operate as an open …

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Obstacle Avoidance And Path Traversal Using Interactive Machine Learning, Jonathan M. Turner Jul 2007

Obstacle Avoidance And Path Traversal Using Interactive Machine Learning, Jonathan M. Turner

Theses and Dissertations

Recently there has been a growing interest in using robots in activities that are dangerous or cost prohibitive for humans to do. Such activities include military uses and space exploration. While robotic hardware is often capable of being used in these types of situations, the ability of human operators to control robots in an effective manner is often limited. This deficiency is often related to the control interface of the robot and the level of autonomy that control system affords the human operator. This thesis describes a robot control system, called the safe/unsafe system, which gives a human operator the …

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Front Matter, Religious Educator Jul 2007

Front Matter, Religious Educator

Religious Educator: Perspectives on the Restored Gospel

No abstract provided.

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The Next Christendom: The Coming Of Global Christianity. By Philip Jenkins, Mark L. Grover Jul 2007

The Next Christendom: The Coming Of Global Christianity. By Philip Jenkins, Mark L. Grover

BYU Studies

Philip Jenkins. The Next Christendom: The Coming of Global Christianity. Revised and Expanded Edition. New York: Oxford University Press, 2007.

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A Cultural Models Approach To Service Recovery, Glenn L. Christensen, Gaby Odekerken-Schröder, Torsten Ringberg Jul 2007

A Cultural Models Approach To Service Recovery, Glenn L. Christensen, Gaby Odekerken-Schröder, Torsten Ringberg

Faculty Publications

Service recovery research remains conflicted in its understanding of consumers’ recovery expectations and of why similar goods or service failures may lead to different recovery expectations. The authors argue that this conflict results from the assumption that consumer recovery expectations are monolithic and largely homogeneous, driven mainly by behavioral, relational, or contextual stimuli. Instead, recovery scenarios involving high-involvement (i.e., self-relevant) goods and service failures may activate closely held, identity-related cultural models that, though ultimately applied to regain balance (a foundational schema), differ according to their sociocultural heritage and create a range of unique consumer recovery preferences. The authors empirically identify …

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Christ, Our Advocate And High Priest, John S. Tanner Jul 2007

Christ, Our Advocate And High Priest, John S. Tanner

Religious Educator: Perspectives on the Restored Gospel

This address was given at the BYU Easter Conference on April 15, 2006.

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Editor's Note, Richard Neitzel Holzapfel Jul 2007

Editor's Note, Richard Neitzel Holzapfel

Religious Educator: Perspectives on the Restored Gospel

No abstract provided.

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Vol. 08 No. 2 Religious Educator, Religious Educator Jul 2007

Vol. 08 No. 2 Religious Educator, Religious Educator

Religious Educator: Perspectives on the Restored Gospel

No abstract provided.

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A Survey Of Dating And Marriage At Byu, Bruce A. Chadwick, Brent L. Top, Richard J. Mcclendon, Lauren Smith, Mindy Judd Jul 2007

A Survey Of Dating And Marriage At Byu, Bruce A. Chadwick, Brent L. Top, Richard J. Mcclendon, Lauren Smith, Mindy Judd

BYU Studies

Studies show that formal dating has all but disappeared from college campuses and has been replaced almost exclusively by "hanging out" and "hooking up"—a euphemism for anything from kissing to having non-committal sexual encounters. The authors surveyed BYU students to discover if dating and courtship patterns mirror the national trends. They report that while BYU students hang out as much as their national peers, and a few even "hook up," BYU students are much different than students at other schools in their levels of abstinence before marriage, the frequency they go on formal dates in addition to hanging out, and …

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Religion And Film: An Introduction. By Melanie J. Wright, Kent R. Bean Jul 2007

Religion And Film: An Introduction. By Melanie J. Wright, Kent R. Bean

BYU Studies

Melanie J. Wright. Religion and Film: An Introduction. New York: I. B. Tauris, 2007

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The Da Vinci Code, The Gospel Of Judas, And Other Bad Ideas, Richard Neitzel Holzapfel Jul 2007

The Da Vinci Code, The Gospel Of Judas, And Other Bad Ideas, Richard Neitzel Holzapfel

Religious Educator: Perspectives on the Restored Gospel

No abstract provided.

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Putting Emotional Reactivity In Its Place? Exploring Family-Of-Origin Influences On Emotional Reactivity, Conflict, And Satisfaction In Premarital Couples, Brandt C. Gardner, Dean M. Busby, Andrew S. Brimhall Jun 2007

Putting Emotional Reactivity In Its Place? Exploring Family-Of-Origin Influences On Emotional Reactivity, Conflict, And Satisfaction In Premarital Couples, Brandt C. Gardner, Dean M. Busby, Andrew S. Brimhall

Faculty Publications

The purpose of this research was to develop a structural equation model that tested the effects of emotional reactivity on the relational health of a representative sample of 736 premarital couples. We hypothesized that partners’ perceived family-of-origin experience would be predictive of partners’ reports of their own and their partners’ emotional reactivity. These reports were hypothesized to predict partners’ reports of their own and their partners’ ability to manage conflict, which were hypothesized to predict relationship satisfaction. Overall, the model fit the data quite well, with particularly interesting differences by gender. We discuss the model’s fit within the larger body …

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Self-Esteem As A Predictor Of Treatment Outcome Among Women With Eating Disorders, Suzanne F. Plowman Jun 2007

Self-Esteem As A Predictor Of Treatment Outcome Among Women With Eating Disorders, Suzanne F. Plowman

Theses and Dissertations

Current empirical evidence suggests that true recovery from eating disorders is not possible without a corresponding improvement in body image and self-esteem. Ten studies in current literature evaluate this relationship between self-esteem and clinical eating disorders during inpatient treatment or during follow-up studies but do not provide both pre- (baseline) and post-treatment self-esteem scores. As a result, many questions about the nature of the relationship between eating disorders and self-esteem remain unanswered. The purpose of this study was to empirically investigate whether a comprehensive measure of self-esteem, given to women at the beginning of inpatient treatment for eating disorders, reliably …

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A New Method For Treating Wells In Reservoir Simulation, Gregory M. Gessel Jun 2007

A New Method For Treating Wells In Reservoir Simulation, Gregory M. Gessel

Theses and Dissertations

A new method for formulating finite difference equations for reservoir simulation has been developed. It can be applied throughout the entire simulated reservoir or to local segments. When applied to cells containing vertical, fully penetrating, straight-line wells in a homogeneous reservoir, the resulting equations are equivalent to Peaceman's classical well equations used in most reservoir simulators today. However, when the new finite difference equations are applied to both the well-containing cells, and their neighbors, the accuracy of the simulation improves substantially. The method produces still better accuracy results when applied throughout the reservoir. Unlike the Peaceman correction, the new method …

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The Effect Of Computer-Adaptive Control (Remediation) On Achievement And Time On Task In Foreign Language Learning, Leslie Ricks Bachelder Jun 2007

The Effect Of Computer-Adaptive Control (Remediation) On Achievement And Time On Task In Foreign Language Learning, Leslie Ricks Bachelder

Theses and Dissertations

Technology has provided the means for the creation of many tools to facilitate the teaching and learning of foreign languages. These tools include computer programs designed to aid language learning by providing various levels of control to the language learner. This control allows the learner to make decisions regarding some or all of the elements of a program such as the pace, sequence, and content to name but a few. Because the amount of learner control can be varied, many research efforts have sought to determine the optimal level of control for learning. These efforts have produced mixed results, with …

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Patterns Of Anticipatory Coarticulation In Adults And Typically Developing Children, Kurtt R. Boucher Jun 2007

Patterns Of Anticipatory Coarticulation In Adults And Typically Developing Children, Kurtt R. Boucher

Theses and Dissertations

Coarticulation is the kinematic and spectral overlap between adjacent sounds during speech production. Coarticulation patterns in typical adults have been well established; however, the manner in which coarticulation is developed in children is still unclear. Research has provided conflicting views, showing that children exhibit more, less, or an equal degree of coarticulation when compared to adult speakers. Considering the divergent findings present in the literature regarding coarticulation in children, the purpose of the present study is to further investigate anticipatory coarticulation in typically developing young children between the ages of three and six years. This study focuses on the acoustic …

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Development Of A Notational Analysis System To Evaluate Setting Performance In Volleyball, Nina Puikkonen Mortensen Jun 2007

Development Of A Notational Analysis System To Evaluate Setting Performance In Volleyball, Nina Puikkonen Mortensen

Theses and Dissertations

The purposes of this study were to develop a notational analysis system to evaluate volleyball setting performance independent of the actions of the hitter and to use the data to develop a Markovian transitional matrix that would make known the probabilities of specific outcomes from each setting scenario. Setting performance was analyzed based on the sets distance from the net, height of the set, and position of the set in relation to the hitter as viewed from 13 filmed competitions of a Division I intercollegiate women's volleyball team. Data from the notation of 1353 sets were used to develop a …

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Eating And Substance Use: A Comparison Of Latter-Day Saint And Non-Latter-Day Saint College Females, Monika Sandberg Jun 2007

Eating And Substance Use: A Comparison Of Latter-Day Saint And Non-Latter-Day Saint College Females, Monika Sandberg

Theses and Dissertations

This study examined differences between Latter-Day Saint (LDS) and non-Latter-Day Saint (non-LDS) females across six universities in the United States regarding desire to engage in substance use and eating behaviors in response to negative emotion. Additionally, this study explored differences between LDS and non-LDS females regarding body image, as well as body image differences between LDS females residing inside Utah and outside Utah. Findings suggested that non-LDS females were more likely to experience increased urges to use substances in response to negative emotion than LDS females, consistent with LDS doctrine teaching the avoidance of substance use. LDS females also did …

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Utah School Psychologists: Self-Reported Reasons For Retention And Job Satisfaction, Lisa A. Dickison Jun 2007

Utah School Psychologists: Self-Reported Reasons For Retention And Job Satisfaction, Lisa A. Dickison

Theses and Dissertations

This study focused on the level of job satisfaction reported by Utah school psychologists and their reasons for staying in their profession. An existing survey was modified and distributed to 119 of the 238 licensed school psychologists in Utah to obtain information on this topic. Sixty-nine school psychologists completed and returned the questionnaire (58% return rate). Based on their feedback, the top five reasons Utah school psychologists stay in their profession were (a) feeling the success and joy of helping students, (b) counseling with students, (c) working one-on-one with students, (d) taking vacation time during summers and holidays, and (e) …

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The Effects Of The Front Squat And Back Squat On Vertical Jump And Lower Body Power Index Of Division 1 Male Volleyball Players, Manu Hoani Peeni Jun 2007

The Effects Of The Front Squat And Back Squat On Vertical Jump And Lower Body Power Index Of Division 1 Male Volleyball Players, Manu Hoani Peeni

Theses and Dissertations

The purpose of this study was to compare effects of the front squat and back squat on vertical jump and lower body power index of division 1 male volleyball players. Eighteen NCAA Division 1 male volleyball players volunteered for this study and were assigned either to a back squat or a front squat training program group. Subjects followed the training program for 8 weeks. Counter-movement vertical jump (CMVJ) height and lower body power index were measured at 0, 4 and 8 weeks of the study. A 2x3 factorial ANOVA revealed no significant difference in CMVJ height and power index between …

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Three Enabling Technologies For Vision-Based, Forest-Fire Perimeter Surveillance Using Multiple Unmanned Aerial Systems, Ryan S. Holt Jun 2007

Three Enabling Technologies For Vision-Based, Forest-Fire Perimeter Surveillance Using Multiple Unmanned Aerial Systems, Ryan S. Holt

Theses and Dissertations

The ability to gather and process information regarding the condition of forest fires is essential to cost-effective, safe, and efficient fire fighting. Advances in sensory and autopilot technology have made miniature unmanned aerial systems (UASs) an important tool in the acquisition of information. This thesis addresses some of the challenges faced when employing UASs for forest-fire perimeter surveillance; namely, perimeter tracking, cooperative perimeter surveillance, and path planning. Solutions to the first two issues are presented and a method for understanding path planning within the context of a forest-fire environment is demonstrated. Both simulation and hardware results are provided for each …

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Dietary Fiber Intake And Body Fat Gain: A Prospective Cohort Study Of Middle-Aged Women, Kathryn Suzanne Thomas Jun 2007

Dietary Fiber Intake And Body Fat Gain: A Prospective Cohort Study Of Middle-Aged Women, Kathryn Suzanne Thomas

Theses and Dissertations

This study was conducted to determine the extent to which changes in dietary fiber consumption affect weight and body fat percentage (BF%) over time. An auxiliary objective was to examine the influence of age, total caloric intake, and physical activity (PA) on the relationship between changes in fiber intake and changes in body composition over time. Design/ Subjects: Prospective cohort design with baseline and follow-up assessments 20 months apart and 252 middle-aged women (40.1±3.0 y). Diet, particularly caloric and fiber intake, was measured using 7-day weighed food records. Body fat was assessed via the Bod Pod, and PA was measured …

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Effects Of Exotic Grasses On Soil Seed Banks In Southeastern Arizona Grasslands, Steven P. Mclaughlin, Janice E. Bowers Jun 2007

Effects Of Exotic Grasses On Soil Seed Banks In Southeastern Arizona Grasslands, Steven P. Mclaughlin, Janice E. Bowers

Western North American Naturalist

At the Appleton-Whittell Research Ranch, an ungrazed grassland preserve in southeastern Arizona, soil seed banks were sampled in June, August, and October 2002 and June 2003. Wildfire had previously burned 90% of the research ranch in May 2002. Seed density and species richness in burned native grassland (2 plots) were compared to those in burned exotic grassland (2 plots). Averaged over 4 sample dates, seed densities were as follows: burned native grassland, 591 ± 243.1 seeds · m−2 and 784 ± 334.9 seeds · m−2; burned exotic grassland, 501 ± 198.9 seeds · m−2 and 196 …

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Optimization Of Nano-Magneto-Optic Sensitivity Using Dual Dielectric Layer Enhancement, Aaron R. Hawkins, J. D. Maas, S. Wang, A. Barman, Holger Schmidt, S. Kwon, B. Harteneck, S. Cabrini, J. Bokor Jun 2007

Optimization Of Nano-Magneto-Optic Sensitivity Using Dual Dielectric Layer Enhancement, Aaron R. Hawkins, J. D. Maas, S. Wang, A. Barman, Holger Schmidt, S. Kwon, B. Harteneck, S. Cabrini, J. Bokor

Faculty Publications

We discuss maximization of the sensitivity of magneto-optical detection of single nanomagnets. We show that a combination of optimized dielectric coating on the magnets with an antireflection coated substrate can increase the areal magneto-optic sensitivity by about three orders of magnitude in the deep nanometer range. A dual layer nanofabrication process is developed to implement this approach, and magnetization switching of single nickel nanomagnets with 50 nm diameter is demonstrated.

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Performance Of Mimo Space-Time Coding Algorithms On A Parallel Dsp Test Platform, Beau C. Neal Jun 2007

Performance Of Mimo Space-Time Coding Algorithms On A Parallel Dsp Test Platform, Beau C. Neal

Theses and Dissertations

Commercial Off The Shelf (COTS) hardware has the advantages of low cost, modularity, and is easily upgraded. For Multiple-Input Multiple-Output (MIMO) space-time algorithms to be practical they must have the processing capability to execute in real-time. This makes COTS ideal for real-time MIMO research where the processing power increases exponentially with a linear increase in antennas. The BYU Electrical Engineering wireless lab has designed and built an eight processor transmitter and a twenty processor receiver to research and develop MIMO wireless communication. The Alamouti, 2 x 2 and 4 x 4 differential space-time MIMO algorithms have been partially implemented on …

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