Digital Commons Network^™

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. …

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 …

End Matter, Religious Educator

Religious Educator: Perspectives on the Restored Gospel

No abstract provided.

Information Consensus And Its Application In Multi-Vehicle Cooperative Control, Ella Atkins, Randal Beard, Wei Ren

Faculty Publications

In the last two decades, advances in networking and distributed computing have facilitated a paradigm shift from large, monolithic mainframe computers to networks of less expensive, less powerful workstations. One motivation for multi-vehicle systems is to achieve the same gains for mechanically controlled systems as has been gained in distributed computation. Rather than having a single monolithic (and therefore expensive and complicated) machine do everything, the hope is that many inexpensive, simple machines, can achieve the same, or enhanced functionality, through coordination. In essence, the objective is to replace expensive complicated hardware with software and multiple copies of simple hardware. …

Do You Know Who You Really Are?, Cynthia Doxey

Religious Educator: Perspectives on the Restored Gospel

This address was given at a Brigham Young University-Idaho devotional on February 7, 2006.

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 …

End Matter, Vol. 3

Monographs of the Western North American Naturalist

No abstract provided.

Front Matter, Vol. 3

Monographs of the Western North American Naturalist

No abstract provided.

Full Issue, Vol. 3

Monographs of the Western North American Naturalist

No abstract provided.

Trend Analysis Shows Decline Of An Endangered Thermophilic Springsnail (Pyrgulopsis Bruneauensis) In Southwestern Idaho, Cary D. Myler, Greg C. Mladenka, G. Wayne Minshall

Western North American Naturalist

We analyzed population trend data during 1991–2004 for the Bruneau hot springsnail (Pyrgulopsis bruneauensis) from rangewide hot spring surveys completed along 4 km of Bruneau River. The objectives of this study were to analyze population trends and assess other measured parameters, such as water temperature, specific conductance, and groundwater decline, for changes that may influence population trends. We used simple linear regression to determine significant relationships between measured parameters. Total numbers of hot springs surveyed in the 4-km reach are declining at a rate of ~5 hot springs per year, and numbers of hot springs containing P. bruneauensis …

Salvage Logging And Replanting Reduce Understory Cover And Richness Compared To Unsalvaged-Unplanted Sites At Mount St. Helens, Washington, J. H. Titus, E. Householder

Western North American Naturalist

The 1980 eruption of Mount St. Helens killed trees in a broad 600-km² swath north of the crater. Over most of the blast zone, dead trees were salvage logged and Abies procera was planted, except in areas within the Mount St. Helens National Volcanic Monument. We compared salvage-replanted sites and unsalvaged sites in 1 area of the blast zone where the sites were adjacent by using twenty-five 200-m² plots for each treatment. Salvaged-replanted plots had significantly lower herb and shrub cover, richness, diversity, litter depth, downed woody debris, nitrate, and phosphate. Salvaged-replanted sites also had significantly more stumps, …

Breeding Biology And Flower Visitors Of The Rare White River Penstemon, Penstemon Scariosus Var. Albifluvis (Scrophulariaceae), Jennifer S. Lewinsohn, Vincent J. Tepedino

Western North American Naturalist

We studied the breeding system and flower visitors of White River penstemon, a rare endemic from the Uintah Basin of eastern Utah and western Colorado. Bagging treatments and hand-pollination treatments showed that Penstemon scariosus var. albifluvis has a mixed mating system: while some seeds and fruits are produced through selfpollination (both autogamy and geitonogamy), significantly more are produced when flowers are cross-pollinated. The primary flower visitors, and likely pollinators, were several species of native twig- and ground-nesting bees in the families Apidae, Halictidae, and Megachilidae. We found no differences in fruit or seed production between open-pollinated controls and hand-outcrossed flowers, …

Yellow Pine Chipmunks Cannot Climb Quaking Aspens: Implications For Avian Nest Site Selection, T. Will Richardson, Stephen B. Vander Wall

Western North American Naturalist

Predation of eggs or nestlings is generally believed to be the most influential factor limiting passerine reproductive success. Thus, there should be strong selective pressures for birds to place their nests in sites that are inaccessible to predators or that are less likely to be discovered by them. We found and monitored 231 nests of 4 species of arboreal, cup-nesting birds: Western Wood-Pewee (Contopus sordidulus), Warbling Vireo (Vireo gilvus), American Robin (Turdus migratorius), and Yellow-rumped Warbler (Dendroica coronata). We determined strength of nest tree species selection by comparing nest trees and tree …

Distribution Of The Milliped Genus Apheloria Chamberlin, 1921; Summaries Of Peripheral Localities And Ones Of A. Virginiensis (Drury, 1770) West Of The Mississippi River (Polydesmida: Xystodesmidae), Rowland M. Shelley, Chris T. Mcallister

Western North American Naturalist

The milliped genus Apheloria occupies a broad area in Québec and Ontario, Canada, and the United States east of the Central Plains, lying generally north of the Gulf Coastal states. It is reported for the 1st time from New Jersey, District of Columbia, Illinois, and Kansas; and the 1st localities are recorded for Massachusetts, Connecticut, South Carolina, Georgia, Alabama, and Wisconsin. The projected distribution encompasses all or parts of the District of Columbia and 27 states, including Vermont and Delaware, where the genus has not been taken; New Hampshire and Mississippi lie outside the range. Chesapeake Bay and the Connecticut …

Absence Of Metathoracic Wings And Corrections To The Description Of Chaetocnema Labiosa White, 1996 (Coleoptera: Chrysomelidae), Shawn M. Clark, Robert L. Johnson

Western North American Naturalist

Corrections and additions to the original description of Chaetocnema labiosa White are given and include the report of characters associated with the loss of flight. New distributional data are provided. Possible host plants and the likelihood of parthenogenetic populations are briefly discussed.

Food Web Structure, Energetics, And Importance Of Allochthonous Carbon In A Desert Cavernous Limnocrene: Devils Hole, Nevada, Kevin P. Wilson, Dean W. Blinn

Western North American Naturalist

We tested the hypothesis that allochthonous carbon is important in the diet of the endemic pupfish Cyprinodon diabolis over a 3-year period in Devils Hole, Nevada. Devils Hole is a cavernous limnocrene located in the Mojave Desert approximately 15 m below the land surface and receives direct solar radiation <7% of the total time during the year. The system is dominated by filamentous cyanobacteria in the summer and supports about 15 invertebrate species and the endemic pupfish C. diabolis. We examined food web structure and measured autochthonous carbon production and entry of allochthonous carbon with funnel traps. Stable isotopes were used to compare contributions of each carbon source. Allochthonous carbon contributed 2971 kj · yr⁻¹ (60%) of the total available energy to the food web compared …

Short-Term Effects Of A Prescribed Burn On Songbirds And Vegetation In Mountain Big Sagebrush, Aaron L. Holmes

Western North American Naturalist

I measured songbird abundance and vegetation cover in and around a 420-ha prescribed burn in a mountain big sagebrush community located at 2133 m elevation. Data were collected during the 3rd growing season after the fire. Brewer's Sparrow and Sage Thrasher occurred in lower abundance on sites that were largely or completely burned relative to sites that were outside the fire perimeter or within unburned islands of shrubs. The number of Brewer's Sparrow detections was linearly related to remaining sagebrush cover. In contrast, Horned Lark occurred at higher abundances on sites where shrub cover had been removed in the prescribed …

Review Of The Harvest Mice (Genus Reithrodontomys) In The Mexican State Of México, Noé González-Ruiz, José Ramírez-Pulido, Hugh H. Genoways

Western North American Naturalist

We examined 590 specimens of Reithrodontomys from 95 localities in the state of México. Four species of the subgenus Reithrodontomys and 1 of the subgenus Aporodon were identified. The former subgenus included R. chrysopsis, R. sumichrasti, R. megalotis, and R. fulvescens, which has 2 subspecies—R. f. toltecus and R. f. mustelinus—in the state. The representative of the subgenus Aporodon is R. microdon wagneri, which is recorded for the first time in the state. We give information on taxonomy, morphometrics, reproduction, habitat characteristics, and related fauna. A discriminant analysis correctly classified 100% of specimens …

Effects Of Prescribed Fall Burning On A Wetland Plant Community, With Implications For Management Of Plants And Herbivores, Scott R. Mcwilliams, Todd Sloat, Catherine A. Toft, Daphne Hatch

Western North American Naturalist

An important contemporary challenge for adaptive resource management is assessing both the direct and indirect effects of management activities by designing appropriate monitoring programs and sound analysis methods. Here we evaluate the effects of prescribed fall burning on a wetland plant community that is managed primarily for spring-migrating geese. During late fall in 2 consecutive years, we burned vegetation in 4 replicate blocks (2.3 ha each) that traversed a natural moisture and associated vegetation gradient. We used ordination, gradient analysis, and contingency table analysis to evaluate how annual changes in relative abundance of plants were affected by burning as well …

C-Reactive Protein Levels According To Physical Activity And Body Weight For Participants In The Coronary Health Improvement Project, Michael T. Massey

Theses and Dissertations

Objectives. Evaluate C-reactive protein (CRP) levels according to weight and physical activity. The study explored how changes in CRP were associated with baseline CRP, weight, and physical activity and changes in these variables.

Methods. A randomized controlled study design assigned 348 individuals to the intervention or control group with measurements taken at baseline, 6 weeks, and 6 months of body weight, physical activity, and serum CRP levels. Participants attended an intensive 40-hour educational course delivered over a four-week period.

Results. At baseline, CRP was negatively associated with total steps/week, and positively associated with weight, BMI, percent fat, and saturated fat …

New Appointments, Xiuying Zou, Dongfang Shao, Abraham Yu, Zhijia Shen

Journal of East Asian Libraries

No abstract provided.

Patterns Of User Activity In The Blackboard Course Management System Across All Courses In The 2004-2005 Academic Year At Brigham Young University, Michael E. Griffiths

Theses and Dissertations

The following report discusses the use of the Blackboard Course Management in terms of overall patterns of activity as recorded in the Blackboard activity database across the whole campus of Brigham Young University during the 2004-2005 academic year. The report contains a set of data represented by tables and graphs that summarize activity, or clicks, in the Blackboard system performed by students, professors, and assistants. The clicks are summarized according to a number of different categories and criteria and analyzed to show interesting patterns of activity. The report is designed to show a general campus wide summary of Blackboard activity …

Distinguishing Importation From Diversification Of Quinolone-Resistant Neisseria Gonorrhoeae By Molecular Evolutionary Analysis, Keith A. Crandall, Marcos Perez-Losada, Margaret C. Bash, Michael Dan, Jonathan Zenilman, Raphael P. Viscidi

Faculty Publications

Distinguishing the recent introduction of quinolone resistant gonococci into a population from diversification of resistant strains already in the population is important for planning effective infection control strategies. We applied molecular evolutionary analyses to DNA sequences from 9 housekeeping genes and gyrA, parC and porB of 24 quinolone resistant N. gonorrhoeae (QRNG) and 24 quinolone sensitive isolates collected in Israel during 2000-2001. Results- Phylogenetic and eBURST analyses and estimates of divergence time indicated QRNG were introduced on 3 separate occasions and underwent limited diversification by mutation, deletion and horizontal gene transfer. Reconstruction of N. gonorrhoeae demography showed a slowly declining …

Mechanisms Causing Ferric Staining In The Secondary Water System Of Brigham City, Utah, Robert Derring Wallace

Theses and Dissertations

Water from Mantua reservoir has, during some years, exhibited reddish-brown staining when used by Brigham City for irrigation. I propose that seasonal fluctuations in the reservoir chemistry create an environment conducive to dissolving iron from the iron-rich sediments, which subsequently precipitate during irrigation, resulting in a staining event. These conditions are produced by chemical and biological decomposition of organic matter, coupled with isolation of the hypolimnetic waters, which results in seasonal low concentrations of dissolved oxygen in these waters. Under these specific circumstances, anaerobic conditions develop creating a geochemical environment that causes iron and manganese reduction from Fe(III) to Fe(II) …

Pharmacokinetics Of Ultrasonically-Released, Micelle-Encapsulated Doxorubicin In The Rat Model And Its Effect On Tumor Growth, Bryant J. Staples

Theses and Dissertations

Chemotherapy is one of the most successful cancer treatments used today. Unfortunately, the amount of chemotherapy a patient can receive is limited by the associated negative side effects, such as cardiotoxicity, immune system suppression, and nephrotoxicity. Encapsulation of these drugs, Doxorubicin (DOX) in particular, in stabilized Pluronic micelles (Plurogel TM) shows success in limiting these harmful side effects. In previous studies, low-frequency ultrasound (US) has been shown, in vitro, to locally release DOX from these micelles. In this study, a novel drug delivery system involving the encapsulation of DOX in Plurogel and the release of the drug at the tumor …

Asymmetric Dihydroxylation And Aziridination Of Allenes And Related Chemistry, Renmao Liu

Theses and Dissertations

A novel method for asymmetric synthesis of α-hydroxy ketone with excellent regio- and stereoselectivity has been established by the systematic investigation of asymmetric dihydroxylation of allenes. The efficiency of kinetic resolution of racemic allenes was also investigated by using the AD reaction on both 1,3-disubstituted and trisubstituted allenes. Steric effects, electronic effects and allene substitution are also discussed. Aziridines were formed by copper-catalyzed intramolecular nitrene addition to alkenes. The carbamate group was used as the tether between the alkene and the nitrene. Subsequent nucleophilic attack of the aziridine was accomplished using RSH, R2NH, N3-,or ROH as the nucleophile. This addition …

The Development Of The Remarital Assessment Questionnaire For Divorced Persons (Raq-D), Derrel Jay Higgins

Theses and Dissertations

The development of the Remarital Assessment Questionnaire for Divorced Persons (RAQ-D) is presented. Steps of development of the questionnaire are outlined: a review of remarital literature, interviews with remarried couples, the creation of a pool of items, review of the items by clinicians, and the development of a preliminary questionnaire. Data were collected through the internet. An Exploratory Factor Analysis of the data yielded scales relating to adjustment areas that are specific to remarital couples. The resulting scales exhibited acceptable level of internal consistency. Psychometric properties of the resulting scales are reported. Implications and recommendations of further development of the …

Investigation Of The Iron Oxidation Kinetics In Mantua Reservoir, Scott H. Lathen

Theses and Dissertations

Irrigation of the municipal cemetery in Brigham City, Utah resulted in stained headstones in 2001 and 2002. The water used in the irrigation came from Mantua reservoir, a medium sized impoundment situated near the mouth of Box Elder Canyon. In order for Brigham City to establish a city wide secondary pressurized irrigation system using water from Mantua reservoir, the cause and the source of staining problem must be determined. Previous research (Wallace 2006) determined that the source of the staining was the reduction of iron found in Mantua Reservoir sediments that occurred when seasonal variations in the reservoir caused anaerobic …

Towards Early State Disease Detection In Microdevices: Fabrication And Testing Of Micro Total Analysis Systems For Bioanalytical Applications, Tao Pan

Theses and Dissertations

The past few years have seen a rapid expansion in interest in the characterization of the entire complement of proteins, or proteome. Micro total analysis systems (μTAS) are an emerging promising method, offering rapid, sensitive and low sample consumption separations. I have demonstrated microchip capillary electrophoresis (CE) devices made of CaF2. New methods have been developed for micromachining enclosed capillaries in CaF2. CE analysis of fluorescently labeled amino acids was used to illustrate bioanalytical applications of these microdevices. Initial on-chip infrared spectroscopy results for qualitative analyte identification were achieved in microfluidic CaF2 channels. I have also shown the evaluation of …

Dutch Women's Perceptions Of Childbirth In The Netherlands, Taralyn R. Johnson, Lynn Clark Callister, Donna S. Freeborn, Renea L. Beckstrand, Katinka Huender

Faculty Publications

Purpose: To explore the lived experience of childbirth in Dutch women who had given birth at home in the Netherlands.

Methods: Qualitative study using audiotaped interviews with 14 women.

Results: Themes included the advantages of giving birth in the home, where the women felt more in control of their environment; the difficulty and normalcy of the pain associated with giving birth; the feelings of fulfillment and empowerment that come with childbirth and motherhood; and the importance of the supportive role of the midwife–caregiver.

Nursing Implications: Women in a culture different from that of the United States who gave birth at …