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Low-Voltage Analog Cmos Architectures And Design Methods, Kent Downing Layton Nov 2007

Low-Voltage Analog Cmos Architectures And Design Methods, Kent Downing Layton

Theses and Dissertations

This dissertation develops design methods and architectures which allow analog circuits to operate at VT + 2Vds,sat, the minimum supply for CMOS circuits with all transistors in the active region where Vds,sat is the drain to source saturation voltage of a MOS transistor. Techniques which meet this criteria for rail-to-rail input stages, gain enhancement stages, and output stages are discussed and developed. These techniques are used to design four fully-differential rail-to-rail amplifiers. The highest gain is shown to be attained using a drain voltage equalization (DVE) or active-bootstrapping technique which produces more than 100dB of gain in a two stage …

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Supporting Flight Control For Uav-Assisted Wilderness Search And Rescue Through Human Centered Interface Design, Joseph L. Cooper Nov 2007

Supporting Flight Control For Uav-Assisted Wilderness Search And Rescue Through Human Centered Interface Design, Joseph L. Cooper

Theses and Dissertations

Inexpensive, rapidly deployable, camera-equipped Unmanned Aerial Vehicle (UAV) systems can potentially assist with a huge number of tasks. However, in many cases such as wilderness search and rescue (WiSAR), the potential users of the system may not be trained as pilots. Simple interface concepts can be used to build an interaction layer that allows an individual with minimal operator training to use the system to facilitate a search or inspection task. We describe an analysis of WiSAR as currently accomplished and show how a UAV system might fit into the existing structure. We then discuss preliminary system design efforts for …

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Split-Half Reliability Of Mlu And Mlu2 In Two Methods Of Utterance Segmentation, Alyse Diana Kemeny Nov 2007

Split-Half Reliability Of Mlu And Mlu2 In Two Methods Of Utterance Segmentation, Alyse Diana Kemeny

Theses and Dissertations

Concerns regarding Mean Length of Utterance (MLU) has led to adaptations of this method of analysis. A recent study by Johnston (2001) introduced an alternative to MLU called MLU2. The current study investigates the split-half reliability of MLU and MLU2 as well as another alternative, Median Length of Utterance (Med-LU). Split-half reliability was found for these methods when segmented into Phonological and Communication Units. Split-half reliability of MLU2 was generally higher than that of MLU, and both were higher than Med-LU. The study suggests that MLU2 may also be a valuable tool for clinicians in analyzing child language.

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Psychometrically Equivalent Cantonese Bisyllabic Word Recognition Materials Spoken By Male And Female Talkers, Brooke Kristin Conklin Nov 2007

Psychometrically Equivalent Cantonese Bisyllabic Word Recognition Materials Spoken By Male And Female Talkers, Brooke Kristin Conklin

Theses and Dissertations

The purpose of this study was to create psychometrically equivalent word lists in the language of Cantonese for word recognition testing. Frequently used bisyllabic Cantonese words were recorded by a native female and male talker. The word lists were evaluated by administering the word recognition lists to 20 native speakers of Cantonese with normal hearing. Each list was presented at 10 different intensity levels ranging from -5 to 40 dB HL in 5 dB increments. Logistic regression was used to determine the words with the steepest logistic regression slopes. The 200 words with the steepest slopes were then formulated into …

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Counter-Flow Ion Mobility Analysis: Design, Instrumentation, And Characterization, Nosa Agbonkonkon Nov 2007

Counter-Flow Ion Mobility Analysis: Design, Instrumentation, And Characterization, Nosa Agbonkonkon

Theses and Dissertations

The quest to achieve high resolution in ion mobility spectrometry (IMS) has continued to challenge scientist and engineers in the field of separation science. The low resolution presently attainable in IMS has continued to negatively impact its utility and acceptance. Until now, efforts to improve the resolution have mainly focused on better instrumentation and detection methods. However, since the resolution of IMS is diffusion limited, it makes sense to address this limitation in order to attain high resolution. This dissertation presents a new IMS technique, which utilizes a high electric field and opposing high gas flow velocity with the aim …

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Numerical Study Of Fully Developed Laminar And Turbulent Flow Through Microchannels With Longitudinal Microstructures, Kevin B. Jeffs Nov 2007

Numerical Study Of Fully Developed Laminar And Turbulent Flow Through Microchannels With Longitudinal Microstructures, Kevin B. Jeffs

Theses and Dissertations

Due to the increase of application in a number of emerging technologies, a growing amount of research has focused on the reduction of drag in microfluidic transport. A novel approach reported in the recent literature is to fabricate micro-ribs and cavities in the channel wall that are then treated with a hydrophobic coating. Such surfaces have been termed super- or ultrahydrophobic and the contact area between the flowing liquid and the solid wall is greatly reduced. Further, due to the scale of the micropatterned structures, the liquid is unable to wet the cavity and a liquid meniscus is formed between …

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Dreamwork With Children: Perceptions And Practice Of School-Based Mental Health Professionals, Rosalia Rodriguez Huermann Nov 2007

Dreamwork With Children: Perceptions And Practice Of School-Based Mental Health Professionals, Rosalia Rodriguez Huermann

Theses and Dissertations

Forty nine public school mental health practitioners (i.e., school counselors, school psychologists, and school social workers) completed a survey about working with dreams when counseling students. Most practitioners in this sample reported having at least one student bring up dreams during counseling and spent some time in counseling working with students' dreams. Practitioners addressed dreams more frequently in situations where the student was having troubling dreams or nightmares, and/or was dealing with death and grief. They also acknowledged working with dreams with students who were diagnosed with Post Traumatic Stress Disorder, were emotionally disturbed, suffered from recurrent dreams, were depressed, …

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Shear Modulus Degradation Of Liquefying Sand: Quantification And Modeling, Peter A. Olsen Nov 2007

Shear Modulus Degradation Of Liquefying Sand: Quantification And Modeling, Peter A. Olsen

Theses and Dissertations

A major concern for geotechnical engineers is the ability to predict how a soil will react to large ground motions produced by earthquakes. Of all the different types of soil, liquefiable soils present some of the greatest challenges. The ability to quantify the degradation of a soil's shear modulus as it undergoes liquefaction would help engineers design more reliably and economically. This thesis uses ground motions recorded by an array of downhole accelerometers on Port Island, Japan, during the 1995 Kobe Earthquake, to quantify the shear modulus of sand as it liquefies. It has been shown that the shear modulus …

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Exercise Induced Hypervolemia: Role Of Exercise Mode, William Bradley Nelson Nov 2007

Exercise Induced Hypervolemia: Role Of Exercise Mode, William Bradley Nelson

Theses and Dissertations

The supine posture has been shown to limit exercise-induced plasma volume expansion. Differences in hydrostatic pressure gradients between the standing and seated position indicate that treadmill exercise might promote a greater plasma volume expansion than cycle ergometer exercise. To test this hypothesis ten subjects performed intermittent high intensity exercise (4 min at 85% VO2max, 5 min at 40% VO2max repeated 8 times) on separate days on the treadmill and cycle ergometer. Changes in plasma volume expansion were calculated from changes in hematocrit and hemoglobin. Stroke volume (SV), trans-thoracic impedance (Z0), HR, and arterial blood pressure (non-invasive arm cuff, SBP & …

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An Evaluation Of A Student Response System Used At Brigham Young University, Coral Marie Hanson Nov 2007

An Evaluation Of A Student Response System Used At Brigham Young University, Coral Marie Hanson

Theses and Dissertations

The purpose of this project is two fold: (a) to evaluate the technology (hardware and software) of the student response system (SRS) used at Brigham Young University (BYU) and (b) to evaluate which instructional methods being used with the SRS students' feel are most helpful. In the past, the student response systems supported by BYU have not fully met the needs of professors and problems with the systems have limited professors' uses of the SRS. Ten professors were randomly selected to participate in the evaluation using a stratified random sampling technique. The data collection methods consisted of classroom observations, interviews …

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Effect Of Beam Splicing On Seismic Response Of Buckling-Restrained Braced Frames, Gary S. Prinz Nov 2007

Effect Of Beam Splicing On Seismic Response Of Buckling-Restrained Braced Frames, Gary S. Prinz

Theses and Dissertations

The deformation capacity of typical buckling-restrained braced frames (BRBFs) is limited by the rotation capacity of connecting regions. The rotation capacity of the connection region is limited by fracture of the gusset welds and yielding in the beams and columns. A different connection detail with beam-splices outside the gusset has been shown to increase connection rotation capacity when compared to typical connections, in a few component tests. This study expands upon the performed component tests, by analyzing the beam splice connection at the system level under directional dynamic loads. Finite element analysis and dynamic loads are used to analyze two …

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Faculty Perceptions Of Technology Projects, Whitney Ransom Mcgowan, Charles R. Graham, Jon Mott Nov 2007

Faculty Perceptions Of Technology Projects, Whitney Ransom Mcgowan, Charles R. Graham, Jon Mott

Faculty Publications

Significant investments in time, money, and effort go into developing and applying technology to improve teaching and learning. As universities pursue such projects, they must determine the impact and value of technology for student learning. During the past decade, funds spent on technology for educational purposes have tripled throughout the United States. Determining a hard return on investment (ROI) for the time and money spent to improve education is difficult, however. Institutions should also measure the value on investment (VOI) that their funds and efforts yield. In the study of faculty and their technology projects at Brigham Young University (BYU) …

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The Relationship Between Reported Out-Of-Class English Use And Proficiency Gains In English, Denisa Krizanova Cundick Nov 2007

The Relationship Between Reported Out-Of-Class English Use And Proficiency Gains In English, Denisa Krizanova Cundick

Theses and Dissertations

This study investigated the relationship of out-of-class English use and proficiency gains. It also explored the relationship of gender, proficiency level and native language and the possible effect of these demographics on out-of-class English use and language gains in English. Though some studies have shown that those who spend more out-of-class time using the target language have higher language gain (Seliger, 1977), other studies have not found this to be true (Day, 1985; Freed 1990; Spada, 1986). Some reasons for the discrepancy in findings may be differences in the length of the time data is collected, samples of study participants …

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The Impact Of Maternal Relationship Quality On Emerging Adults’ Prosocial Tendencies: Indirect Effects Via Regulation Of Prosocial Values, Carolyn Mcnamara Barry, Laura M. Padilla-Walker, Stephanie D. Madsen, Larry J. Nelson Oct 2007

The Impact Of Maternal Relationship Quality On Emerging Adults’ Prosocial Tendencies: Indirect Effects Via Regulation Of Prosocial Values, Carolyn Mcnamara Barry, Laura M. Padilla-Walker, Stephanie D. Madsen, Larry J. Nelson

Faculty Publications

Studies document that parents serve as children’s primary socialization agents, particularly for moral development and prosocial behavior; however, less is known regarding parental influences on prosocial outcomes during the transition to adulthood. The purpose of this study was to investigate how mother–child relationship quality was related to prosocial tendencies via emerging adults’ regulation of prosocial values. Participants included 228 undergraduate students (ranging from 18 to 25 years; 90% European American) and their mothers (ranging from 38 to 59 years) from four locations across the United States. Path analyses using structural equation modeling revealed that mother–child relationship quality was related to …

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Intersection Algorithms Based On Geometric Intervals, Nicholas Stewart North Oct 2007

Intersection Algorithms Based On Geometric Intervals, Nicholas Stewart North

Theses and Dissertations

This thesis introduces new algorithms for solving curve/curve and ray/surface intersections. These algorithms introduce the concept of a geometric interval to extend the technique of Bézier clipping. A geometric interval is used to tightly bound a curve or surface or to contain a point on a curve or surface. Our algorithms retain the desirable characteristics of the Bézier clipping technique such as ease of implementation and the guarantee that all intersections over a given interval will be found. However, these new algorithms generally exhibit cubic convergence, improving on the observed quadratic convergence rate of Bézier clipping. This is achieved without …

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Gender Differences And Similarities In The Work-Family Interface: The Importance Of Considering Family Life Stages, Giuseppe Martinengo Oct 2007

Gender Differences And Similarities In The Work-Family Interface: The Importance Of Considering Family Life Stages, Giuseppe Martinengo

Theses and Dissertations

This study focuses on the importance of considering the interaction between gender and family life stages to properly understand gender similarities and differences in the work and family interface. Data for this study come from the IBM 2004 Global Work and Life Issues Survey representing 79 countries (N=41,813). This study is a first step toward a better understanding of similarities and differences among male and female workers across the life course and it shows that work, family and life outcomes are similar across groups, independent of life stages or gender. Six family life stage groups were created: no children and …

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Accounting For Additional Heterogeneity: A Theoretic Extension Of An Extant Economic Model, Bradley John Barney Oct 2007

Accounting For Additional Heterogeneity: A Theoretic Extension Of An Extant Economic Model, Bradley John Barney

Theses and Dissertations

The assumption in economics of a representative agent is often made. However, it is a very rigid assumption. Hall and Jones (2004b) presented an economic model that essentially provided for a representative agent for each age group in determining the group's health level function. Our work seeks to extend their theoretical version of the model by allowing for two representative agents for each age—one for each of “Healthy” and “Sick” risk-factor groups—to allow for additional heterogeneity in the populace. The approach to include even more risk-factor groups is also briefly discussed. While our “extended” theoretical model is not applied directly …

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Applying Bayesian Ordinal Regression To Icap Maladaptive Behavior Subscales, Edward P. Johnson Oct 2007

Applying Bayesian Ordinal Regression To Icap Maladaptive Behavior Subscales, Edward P. Johnson

Theses and Dissertations

This paper develops a Bayesian ordinal regression model for the maladaptive subscales of the Inventory for Client and Agency Planning (ICAP). Because the maladaptive behavior section of the ICAP contains ordinal data, current analysis strategies combine all the subscales into three indices, making the data more interval in nature. Regular MANOVA tools are subsequently used to create a regression model for these indices. This paper uses ordinal regression to analyze each original scale separately. The sample consists of applicants for aid from Utah's Division of Services for Persons with Disabilities. Each applicant fills out the Scales of Independent Behavior"”Revised (SIB-R) …

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Heuristic Weighted Voting, Kristine Perry Monteith Oct 2007

Heuristic Weighted Voting, Kristine Perry Monteith

Theses and Dissertations

Selecting an effective method for combining the votes of classifiers in an ensemble can have a significant impact on the overall classification accuracy an ensemble is able to achieve. With some methods, the ensemble cannot even achieve as high a classification accuracy as the most accurate individual classifying component. To address this issue, we present the strategy of Heuristic Weighted Voting, a technique that uses heuristics to determine the confidence that a classifier has in its predictions on an instance by instance basis. Using these heuristics to weight the votes in an ensemble results in an overall average increase in …

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Error Sensor Placement For Active Control Of An Axial Cooling Fan, Benjamin M. Shafer Oct 2007

Error Sensor Placement For Active Control Of An Axial Cooling Fan, Benjamin M. Shafer

Theses and Dissertations

Recent experimental achievements in active noise control (ANC) for cooling fans have used near-field error sensors whose locations are determined according to a theoretical condition of minimized sound power. A theoretical point source model, based on the condition previously stated, reveals the location of near-field pressure nulls that may be used to optimize error sensor placement. The actual locations of these near-field pressure nulls for both an axial cooling fan and a monopole loudspeaker were measured over a two-dimensional grid with a linear array of microphones. The achieved global attenuation for each case is measured over a hemisphere located in …

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A Revision Of The Marital Status Inventory: Reliability And Validity With Marital And Remarital Couples, Rachel V. Jamieson Oct 2007

A Revision Of The Marital Status Inventory: Reliability And Validity With Marital And Remarital Couples, Rachel V. Jamieson

Theses and Dissertations

Predicting divorce potential has been of interest to researchers and clinicians. The Marital Status Inventory (Weiss & Ceretto, 1980) was developed to provide information about clients' perceived divorce potential. The MSI has been widely used but there have been complaints about the negatively worded items from clients, therapists, and researchers. Therefore, this study compared a revised form of the MSI (MSI-R has no negatively worded items) with the original format. There were three purposes of the study. The first was to assess the reliability and validity of the MSI-R. The second purpose was to see if the MSI-R continued to …

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Integrated Piezoresistive Sensing For Feedback Control Of Compliant Mems, Robert K. Messenger Oct 2007

Integrated Piezoresistive Sensing For Feedback Control Of Compliant Mems, Robert K. Messenger

Theses and Dissertations

Feedback control of MEMS devices has the potential to significantly improve device performance and reliability. One of the main obstacles to its broader use is the small number of on-chip sensing options available to MEMS designers. A method of using integrated piezoresistive sensing is proposed and demonstrated as another option. Integrated piezoresistive sensing utilizes the inherent piezoresistive property of polycrystalline silicon from which many MEMS devices are fabricated. As compliant MEMS structures flex to perform their functions, their resistance changes. That resistance change can be used to transduce the structures' deflection into an electrical signal. This dissertation addresses three topics …

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Inter- And Intra-Subject Variability: A Palatometric Study, Marybeth Corey Sanders Oct 2007

Inter- And Intra-Subject Variability: A Palatometric Study, Marybeth Corey Sanders

Theses and Dissertations

Electropalatometry (EPM) has proven to be a useful clinical and research tool for measuring tongue-to-palate contact. The goal of this study was to determine whether the development of a database of standardized palatometric articulation files is feasible by examining the variability which exists within and between speakers. Twenty standard American English dialect speakers were fitted with palatometer pseudopalates. Test stimuli were VCV nonsense words using a schwa in the initial position, the 15 palatal consonants, and three corner vowels, /a/, /i/, /u/. From these palatometric recordings a variability index was created to examine intra- and interspeaker variability. Different aspects of …

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A Generalized Two-Dimensional Model To Reconstruct The Impact Phase In Automobile Collisions, Regis Agenor David Oct 2007

A Generalized Two-Dimensional Model To Reconstruct The Impact Phase In Automobile Collisions, Regis Agenor David

Theses and Dissertations

Automobile accident reconstruction has been facilitated by the development of computer based modules to allow evaluation of evidence gathered at the accident scenes. Although the computer modules are based in fundamental physical laws, an understanding of these laws by the user is required for proper application of the computer model in a given accident scenario. Vehicle collision analysis techniques generally separate the collision into three phases: pre-impact, impact, and post impact. The intent of the research is to provide a generalized model to reconstruct two dimensional impact problems in the area of accident reconstruction. There are currently two modeling techniques …

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Usa: A Civilization Of Its Own?, Peter O'Brien Oct 2007

Usa: A Civilization Of Its Own?, Peter O'Brien

Comparative Civilizations Review

No abstract provided.

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Online Vertical Layout: Chinese Characters, Images And The Web, Louis Chor Oct 2007

Online Vertical Layout: Chinese Characters, Images And The Web, Louis Chor

Journal of East Asian Libraries

No abstract provided.

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No. 143 Journal Of East Asian Libraries, Journal Of East Asian Libraries Oct 2007

No. 143 Journal Of East Asian Libraries, Journal Of East Asian Libraries

Journal of East Asian Libraries

No abstract provided.

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The Civilization Index, Andrew Targowski Oct 2007

The Civilization Index, Andrew Targowski

Comparative Civilizations Review

No abstract provided.

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Limitations And Extensions Of The Wolf-Phc Algorithm, Philip R. Cook Sep 2007

Limitations And Extensions Of The Wolf-Phc Algorithm, Philip R. Cook

Theses and Dissertations

Policy Hill Climbing (PHC) is a reinforcement learning algorithm that extends Q-learning to learn probabilistic policies for multi-agent games. WoLF-PHC extends PHC with the "win or learn fast" principle. A proof that PHC will diverge in self-play when playing Shapley's game is given, and WoLF-PHC is shown empirically to diverge as well. Various WoLF-PHC based modifications were created, evaluated, and compared in an attempt to obtain convergence to the single shot Nash equilibrium when playing Shapley's game in self-play without using more information than WoLF-PHC uses. Partial Commitment WoLF-PHC (PCWoLF-PHC), which performs best on Shapley's game, is tested on other …

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A 17-Year Longitudinal Study Of Spiritual Development And Psychological Correlates In A Sample Of College Students, Jeremy Daniel Bartz Sep 2007

A 17-Year Longitudinal Study Of Spiritual Development And Psychological Correlates In A Sample Of College Students, Jeremy Daniel Bartz

Theses and Dissertations

In 1984, 1987 and 2001 data were collected on a religiously devout group of college students in an effort to better understand the process of religious development and the relationship between religiosity and mental health. This study analyzes that data by examining the stability of two different religious development styles that were identified in 1984, the stability of religious motivations over the course of adulthood, and the relationship between devoutness and psychopathology. This study found that (a) the religious developmental styles did not remain consistent from 1984 to 2001, (b) the participants' religious motivations remained stable over the course of …

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