Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Brigham Young University

Discipline
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 2131 - 2160 of 17318

Full-Text Articles in Entire DC Network

Computational Tools For Modeling And Simulation Of Sooting Turbulent Non-Premixed Flames, Victoria B. Stephens Dec 2022

Computational Tools For Modeling And Simulation Of Sooting Turbulent Non-Premixed Flames, Victoria B. Stephens

Theses and Dissertations

Turbulent combustion systems are physically complex processes that involve many interdependent phenomena---including turbulent fluid dynamics, multi-component mass transfer, convective and radiative heat transfer, and multiphase flow---that occur over a wide range of length and time scales. Modeling and simulation studies complement experimental work by implementing and validating models and providing predictive capabilities, but current software tools are often limited by a lack of standardization and best practices, non-robust implementation, or over-specialization. Some topics in combustion CFD research, notably radiative heat transfer and soot modeling, are critically underrepresented in simulation studies as a result of software limitations. This project establishes and …

Go to article

Advanced Isogeometric Discretization Techniques, Kyle Dennis Richardson Dec 2022

Advanced Isogeometric Discretization Techniques, Kyle Dennis Richardson

Theses and Dissertations

In this dissertation, I provide a robust, efficient inverse mapping algorithm for use in immersed simulation methods, specifically in the Flex Representation Method. I also explore a structural theory that unifies the theories of solids, shells, beams, and rigid bodies. As part of this, I preform a preliminary exploration of applying the Flex Representation Method to shells. Finally, I explore why higher order elements suffer from small critical time steps in explicit dynamics. I then propose a simple method of remedying this issue by exploiting the properties of U-splines.

Go to article

Temporal Fluency In L2 Self-Assessments: A Cross-Linguistic Study Of Spanish, Portuguese, And French, Mandy Case Dec 2022

Temporal Fluency In L2 Self-Assessments: A Cross-Linguistic Study Of Spanish, Portuguese, And French, Mandy Case

Theses and Dissertations

The present study explores the relationship between temporal fluency and second language (L2) learners' self-assessed and externally assessed proficiency level across the target languages French, Spanish, and Portuguese. Temporal fluency is operationalized as articulation rate (the speed of speech), the mean length of utterance, and the silent pause frequency. Participants (n = 283) in this study are native English speakers enrolled in upper-division language courses at Brigham Young University (BYU). Each participant completed both a self-assessment (the Language Ability Self-Evaluation Resource or LASER) as well as the Computerized Oral Proficiency Interview (OPIc) to receive an external proficiency assessment. Temporal fluency …

Go to article

Parametric Structural Optimization Of A Wheel Using The Flex Representation Method, Gregory John Vernon Dec 2022

Parametric Structural Optimization Of A Wheel Using The Flex Representation Method, Gregory John Vernon

Theses and Dissertations

The use of the finite element method within an optimization workflow is fraught with challenges that limit the automation of such workflows. These challenges are inherent to the traditional finite element formulations which are heavily dependent on a manual meshing process that introduces variability that is challenging to account for within an automated workflow. The recently developed flex representation method (FRM) provides a salient solution to the manual meshing process without sacrificing solution accuracy. In response to the development of FRM a global automotive company requested a study to explore the applicability of FRM to one of their sizing-optimization problems: …

Go to article

Biofilm Characterization And The Potential Role Of Edna In Horizontal Gene Transfer In Hospital And Meat Isolates Of Staphylococcus Aureus And Their Biofilms, Ashley Lynne Ball Dec 2022

Biofilm Characterization And The Potential Role Of Edna In Horizontal Gene Transfer In Hospital And Meat Isolates Of Staphylococcus Aureus And Their Biofilms, Ashley Lynne Ball

Theses and Dissertations

Staphylococcus aureus is a pathogen responsible for a wide variety of life-threatening diseases such as bacteremia, endocarditis, and pneumoniae. S. aureus has been a major concern in recent years due to the rampant spread of antibiotic resistance. The ability of S. aureus to form biofilms aids in the spread of antibiotic resistance as biofilms are a known hotspot for horizontal gene transfer. Biofilms also protect cells from host immune responses and antibiotics, making these infections very difficult to treat. The matrix of S. aureus biofilms can be made of polysaccharides, protein, and DNA. In these studies, we sought to elucidate …

Go to article

Medical And Socioeconomic Predictors Of Psychosocial Functioning In Pediatric Hydrocephalus, Vanessa Wall Dec 2022

Medical And Socioeconomic Predictors Of Psychosocial Functioning In Pediatric Hydrocephalus, Vanessa Wall

Theses and Dissertations

Hydrocephalus can impact all areas of health, including physical, cognitive, and psychosocial functioning. Etiology can be a major factor in health outcomes, but prior research on psychosocial functioning in hydrocephalus has been with limited etiologies. This study examined psychosocial functioning using the Behavioral Assessment System for Children, Third Edition (BASC-3) and the Hydrocephalus Outcome Questionnaire (HOQ) in children aged 5-17 years old. BASC-3 and HOQ parent report scores were compared between hydrocephalus etiologies. Medical factors (number of CSF diversion procedures, history of seizures, and years with hydrocephalus) and SES factors (family income, parent education, and parent occupational status) were examined …

Go to article

The Flex Representation Method: Versatile Modeling For Isogeometric Analysis, Christopher David Whetten Dec 2022

The Flex Representation Method: Versatile Modeling For Isogeometric Analysis, Christopher David Whetten

Theses and Dissertations

The Flex Representation Method (FRM) leverages unique computational advantages of splines to address limitations in the process of building CAE simulation models from CAD geometric models. Central to the approach is the envelope CAD domain that encapsulates a CAD model. An envelope CAD domain can be of arbitrary topological and geometric complexity. Envelope domains are constructed from spline representations, like U-splines, that are analysis-suitable. The envelope CAD domain can be used to approximate none, some, or all of the features in a CAD model. This yields additional simulation modeling options that simplify the model-building process while leveraging the properties of …

Go to article

Complete Equitable Decompositions, Joseph Paul Drapeau Dec 2022

Complete Equitable Decompositions, Joseph Paul Drapeau

Theses and Dissertations

A well-known result in spectral graph theory states that if a graph has an equitable partition then the eigenvalues of the associated divisor graph are a subset of the graph's eigenvalues. A natural question question is whether it is possible to recover the remaining eigenvalues of the graph. Here we show that if a graph has a Hermitian adjacency matrix then the spectrum of the graph can be decomposed into a collection of smaller graphs whose eigenvalues are collectively the remaining eigenvalues of the graph. This we refer to as a complete equitable decomposition of the graph.

Go to article

Psychological Distress Mediates The Relationship Between Health And Satisfaction With Daily Marital Interactions: A Daily Diary Assessment, Stephanie L. Richardson Dec 2022

Psychological Distress Mediates The Relationship Between Health And Satisfaction With Daily Marital Interactions: A Daily Diary Assessment, Stephanie L. Richardson

Theses and Dissertations

Literature has often connected the variables of physical health, mental health, and romantic relationship satisfaction or quality. However, there has yet been any evidence of a mediating relationship. The purpose of this study is to test for mediation of satisfaction with daily marital interactions on physical symptoms through psychological distress. The data is from the Life and Family Legacies Daily Experiences Study and includes 191 older couples over the course of 14 days. Multilevel dyadic models were estimated for both the same-day data as well as lagged data. Indirect effects between the variables were significant, but not for the lagged …

Go to article

Autonomic Responses During Animated Avatar Video Modeling Instruction Of Social Emotional Learning To Students With Adhd: A Mixed Methods Study, Jesse D. Rhodes Dec 2022

Autonomic Responses During Animated Avatar Video Modeling Instruction Of Social Emotional Learning To Students With Adhd: A Mixed Methods Study, Jesse D. Rhodes

Theses and Dissertations

For those with attention deficit hyperactivity disorder (ADHD), social interactions involving high levels of face-to-face interaction can raise stress levels and emotional dysregulation. Using animated avatar video models may mitigate potential emotional dysregulation while learning social skills in these populations. This study examined autonomic data of adolescents aged 7-13 diagnosed with attention deficit hyperactivity disorder (ADHD), n=5 during avatar animated video modeling (AAVM) of social and emotional skills. This was a replication study with the addition of biofeedback data collection and a change of population. Participants were given three Nearpod training modules with AAVM and multiple-choice quizzes on self-awareness, social …

Go to article

Developing A Quantitative Understanding Of U-Substitution In First-Semester Calculus, Leilani Camille Heaton Fonbuena Dec 2022

Developing A Quantitative Understanding Of U-Substitution In First-Semester Calculus, Leilani Camille Heaton Fonbuena

Theses and Dissertations

In much of calculus teaching there is an overemphasis on procedures and manipulation of symbols and insufficient emphasis on conceptual understanding of calculus topics. As such students to struggle to understand and use calculus ideas in applied settings. Research shows that learning calculus topics from a quantitative reasoning-perspective results in more powerful and flexible conceptions of calculus topics like integration. However, topics beyond introducing integrals and the Fundamental Theorem of Calculus, like u-substitution, have yet to be explored from a quantity-based perspective. In this study, I conducted a set of two clinical interviews where we discussed quantitative meanings of integrals, …

Go to article

"This Whole Journey Was Sacred": Latter-Day Saint Parents' Process In Coming To Accept A Transgender Child, Julia Campbell Bernards Dec 2022

"This Whole Journey Was Sacred": Latter-Day Saint Parents' Process In Coming To Accept A Transgender Child, Julia Campbell Bernards

Theses and Dissertations

This grounded theory methodology (GTM) study examines the process of members of the Church of Jesus Christ of Latter-day Saints in coming to accept a transgender or gender diverse (TGD) child. Data comes from interviews with 38 Latter-day Saint parents of TGD children and 130 Facebook posts from the same population. Data was analyzed using GTM in coding and theory construction. A model of Latter-day Saint parents' process in accepting a TGD child and the factors that impact that process is presented. The results indicate that coming to accept a TGD child tends to engage Latter-day Saint parents cognitively, emotionally, …

Go to article

Teacher Perceptions Of Grades And Grading In A Pandemic, Michael V. Anderson Dec 2022

Teacher Perceptions Of Grades And Grading In A Pandemic, Michael V. Anderson

Theses and Dissertations

A grade serves as the primary means of reporting feedback to teachers, students, and parents about the student's level of learning (Heflebower et al., 2014). Many schools have attempted to have teachers adopt standards-based grading, yet school leaders do not know teachers' perceptions about grades and grading. This quantitative study examines the perceptions of 1271 secondary teachers in one school district regarding grades and grading and how they may have changed as a result of the COVID-19 pandemic. Data collected from a survey reveals how changes in teacher perceptions about grades and grading may yield an opportunity for further standards-based …

Go to article

Parental Warmth And Disciplinary Strategies In Two-Parent-Adoptive And Biological Families, Jordan Coburn Dec 2022

Parental Warmth And Disciplinary Strategies In Two-Parent-Adoptive And Biological Families, Jordan Coburn

Theses and Dissertations

Adopted children enter families with parents who on average are older, have higher income, and have more education than other family structures. Because adopted children are moving into families with more resources, research suggests that they would do just as well as, and perhaps even better than, children in biological two-parent households. However, this is not always the case. Understanding how different variables could offset any negative results of adoption is a puzzle that researchers are continually exploring. Previous research has investigated differences in investments from adoptive and biological parents through multiple theoretical lenses. I seek to add to current …

Go to article

Structural Reasoning With Rational Expressions, Dana Steinhorst Dec 2022

Structural Reasoning With Rational Expressions, Dana Steinhorst

Theses and Dissertations

Many students struggle to make sense of algebraic expressions in math. This lack of understanding results in students making symbolic manipulation errors, hindering their procedural fluency. Researchers believe these errors are linked to students' lack of structural reasoning. While research has shown that students rarely engage in expert structural reasoning, little is known about how students actually reason structurally. In this study, I interviewed six high school calculus students to study the way they identified, matched, and evaluated structures as they solved problems involving rational expressions and equations. I analyzed the participant interviews and outlined the matching process they used …

Go to article

Teaching Social-Emotional Learning To Children With Autism Using Animated Avatar Video Modeling, Emelie Davis Dec 2022

Teaching Social-Emotional Learning To Children With Autism Using Animated Avatar Video Modeling, Emelie Davis

Theses and Dissertations

People with a diagnosis of autism spectrum disorder (ASD) often have difficulties understanding or applying skills related to Social-Emotional Learning (SEL). An individual having a better understanding of SEL concepts is generally associated with more fulfilling connections with others and increased satisfaction in life. Since people with ASD tend to have greater success with learning in structured environments, we created a module to teach these skills using Nearpod. These modules were created with videos of a person embodying a cartoon dog face using Animoji for two reasons; because the animation was meant to appeal to children, and the creation was …

Go to article

Creating An Instrument To Explore The Self-Efficacy Of Writing Instructors To Teach Apprehensive Writers, Kathleen Marie Romrell Dec 2022

Creating An Instrument To Explore The Self-Efficacy Of Writing Instructors To Teach Apprehensive Writers, Kathleen Marie Romrell

Theses and Dissertations

Writing apprehension is a writing difficulty that can impair the writing experiences of students. While researchers have proposed many interventions that teachers can implement to assist their students who struggle with writing apprehension, there has not been an instrument that is designed to measure teacher self-efficacy to help these same students. This study created such an instrument, entitled the Self-efficacy to Teach Apprehensive Writers Scale (STAWS), using Tschannen-Moran and Woolfolk Hoy’s (2001) Teacher Sense of Efficacy Scale and Daly and Miller’s (1975) Writing Apprehension Test as model instruments. The new instrument was designed to measure writing instructor self-efficacy to teach …

Go to article

Delivering Explicit Math Instruction Through Point-Of-View Video Modeling To Elementary Students With Autism Spectrum Disorder, Patsy Mccray Gibbs Dec 2022

Delivering Explicit Math Instruction Through Point-Of-View Video Modeling To Elementary Students With Autism Spectrum Disorder, Patsy Mccray Gibbs

Theses and Dissertations

There is significant literature demonstrating the effectiveness of video modeling for teaching skills to students with disabilities. Still, much less is known about how video modeling, particularly point-of-view video modeling (POV-VM), might be applied to teach academic skills to children with an autism spectrum disorder. This multiple probe single-case design study used explicit instruction techniques to teach multiplication, division, and fraction skills to two elementary-aged students with an autism spectrum disorder. A visual analysis of the data showed that POV-VM using explicit techniques to deliver the videos is an effective intervention for autistic students This research study adds to the …

Go to article

Decision-Based Learning As A Tool For Teaching Statistics In A Peruvian University, Gloria Mora Barba Dec 2022

Decision-Based Learning As A Tool For Teaching Statistics In A Peruvian University, Gloria Mora Barba

Theses and Dissertations

Many students find that learning statistics is difficult, especially novice learners first taking statistical classes. Instructors also struggle to teach statistics due to many challenges, such as students' misconceptions, lack of math skills, negative attitudes, and deficient instructional methods. A new pedagogical approach called Decision-Based Learning (DBL) has been developed to help instructors and students overcome these challenges. A group of Peruvian university professors in 2018 and 2019 were trained to use DBL. However, limited studies have explored DBL instructors' and students' experiences using DBL in Peru. The aim of this qualitative research study is to deeply understand the experiences …

Go to article

"This Is The Way": Gender Representation In Disney's The Mandalorian, Brooke Solorio Dec 2022

"This Is The Way": Gender Representation In Disney's The Mandalorian, Brooke Solorio

Theses and Dissertations

When Disney released The Mandalorian, it quickly became the top show on its highly popular streaming platform. As with all media wielding this level of exposure, it is important to closely examine its content for depictions of peoples including females. In accordance with Sandra Bem's gender schema theory, the implicit messaging in this series can influence the formation of people's mental shortcuts about what it means to be female. This study employs content analysis to illuminate the portrayal of physical and non-physical attributes of the women present in the two seasons existing at the time of this study. Results reveal …

Go to article

Is Teaching Experience A Predictor For School Psychologists' Confidence And Competence In Behavior Intervention Plans?, Misty Dawn Lainé Coplan Dec 2022

Is Teaching Experience A Predictor For School Psychologists' Confidence And Competence In Behavior Intervention Plans?, Misty Dawn Lainé Coplan

Theses and Dissertations

The Individuals with Disabilities Education Improvement Act (IDEIA) introduced Behavior Intervention Plans (BIPs) into United States law in 1990, and the reauthorization of IDEIA occurred in 2004. Even though BIPs have been codified into law, school personnel struggle to meet BIP mandates due to poor implementation fidelity. Barriers for BIP implementation are varied, but there is little research regarding whether practitioner competence and confidence through teaching experience is a factor. School psychologists (N = 122) from eight states completed a self-evaluation survey using the tailored design method. Results from the survey compared responses from school psychologists with and without teaching …

Go to article

Novel Patterns For Nucleosome Positioning: From In Vitro To In Vivo, David Andrew Bates Dec 2022

Novel Patterns For Nucleosome Positioning: From In Vitro To In Vivo, David Andrew Bates

Theses and Dissertations

The fundamental unit of chromatin is the nucleosome, which consists of a core of eight proteins wrapped by DNA. This core is composed of four pairs of histone proteins: H2A, H2B, H3, and H4. The DNA wraps around the protein core ~1.7 times, facilitating compaction of DNA length in the cell. Further, the location of nucleosomes makes genomic elements encoded in the DNA, such as promoters or enhancers, accessible or inaccessible to RNA polymerase and transcription factors. Thus, where nucleosomes are located (or positioned), can play a major role in transcription or other cellular processes. Additionally, histone proteins are frequently …

Go to article

Voices From The Field: A Critical Incident Study Of Teachers' Perspectives On What Helps And Hinders The Implementation Of Behavior Intervention Plans In The Classroom, Emily Anne Cragun Dec 2022

Voices From The Field: A Critical Incident Study Of Teachers' Perspectives On What Helps And Hinders The Implementation Of Behavior Intervention Plans In The Classroom, Emily Anne Cragun

Theses and Dissertations

Student problem behavior continues to be a major issue in schools for both teachers and students. Teachers often feel they are not provided with enough resources to help them manage this problem behavior. Students who engage in problem behavior tend to struggle socially and academically. When classified with an emotional disturbance, students are especially at risk due to the severity of the problem behavior they exhibit (Brauner & Stephens, 2006). This study examined how function-based interventions can help both teachers and students better manage the effects of problem behavior. There are several factors believed to hinder the effectiveness of function-based …

Go to article

Principles For Using Remote Data Collection Devices And Deep Learning In Evaluating Social Impact Indicators Of Engineered Products For Global Development, Bryan J. Stringham Dec 2022

Principles For Using Remote Data Collection Devices And Deep Learning In Evaluating Social Impact Indicators Of Engineered Products For Global Development, Bryan J. Stringham

Theses and Dissertations

Evaluating the social impacts of engineered products, or effects products have on the daily lives of individuals, is critical to ensuring that products are having positive impacts while avoiding negative impacts and to learning how to improve product designs for a more positive social impact. One approach to quantifying a product's social impact is to use social impact indicators that combine user data in a meaningful way to give insight into the current social condition of an individual or population. However, determining social impact indicators relative to engineered products and individuals in developing countries can be difficult when there is …

Go to article

How Universities Use Twitter To Communicate About Mental Health, Sarah Elizabeth Polhill Dec 2022

How Universities Use Twitter To Communicate About Mental Health, Sarah Elizabeth Polhill

Theses and Dissertations

From a sample of over three million tweets from universities in the US, we described the characteristics of universities' communication about mental health on Twitter, including common keywords, bigrams, linked resources, and hashtags, as well as the frequency of dialogic communication and mental health tweets over time, especially in the context of the COVID-19 Pandemic. This study uses data mining to collect tweets from official university Twitter accounts and selected accounts of university wellness and counseling programs. Relevant tweets were collected from a large sample using keywords and bigrams relevant to mental health from the Twitter accounts of IACS accredited …

Go to article

Deep-Brain Shape Features Differentially Relate To Social Outcomes In Pediatric Traumatic Brain Injury, Braydon Lee Dec 2022

Deep-Brain Shape Features Differentially Relate To Social Outcomes In Pediatric Traumatic Brain Injury, Braydon Lee

Undergraduate Honors Theses

Pediatric traumatic brain injury (TBI) is a global issue with major health consequences. The integrity of brain structures and their social functional correlates are at risk in children with TBI. In this study, magnetic resonance images of the thalamus, caudate, putamen, and globus pallidus were examined in a pediatric TBI group from the Social Outcomes of Brain Injury in Kids (SOBIK). Shape deformations of these structures were compared to an orthopedically injured (OI) control. Additionally, the correlation between shape deformation and theory of mind (ToM) measures were mapped and compared. This study found inward deformations in the ventral thalamic nuclei …

Go to article

Improving Spatial Resolution Of Time Reversal Focusing Using Arrays Of Acoustic Resonators, Adam David Kingsley Dec 2022

Improving Spatial Resolution Of Time Reversal Focusing Using Arrays Of Acoustic Resonators, Adam David Kingsley

Theses and Dissertations

Using a near-field array of acoustic resonators, it is possible to modify a focused pressure field and enforce a spatial frequency corresponding to the resonator array spacing. This higher spatial frequency makes it possible to focus and image with a resolution that is better than if the focusing were in free space. This near-field effect is caused by the phase shifting properties of resonators and, specifically, the delayed phase found in waves with a temporal frequency lower than that of the resonators in the array. Using time reversal, arrays of resonators are explored and the subwavelength focusing is used to …

Go to article

“Surfaces And Appearances”: Character, Physiognomy, And Communication In Charles Dickens’S And Wilkie Collins’S A Message From The Sea, Rachel Gouff Dec 2022

“Surfaces And Appearances”: Character, Physiognomy, And Communication In Charles Dickens’S And Wilkie Collins’S A Message From The Sea, Rachel Gouff

Undergraduate Honors Theses

This thesis analyzes the way physiognomy works within Charles Dickens’s and Wilkie Collins’s novella, A Message from the Sea. The novella develops and promotes a version of physiognomy with limits, illustrating these limits through the experiences of its characters and through the symbolism of various objects such as tombstones, ghosts, and—most notably—the message in the bottle. Physiognomy, used repeatedly by various characters throughout the text, is nearly always able to correctly predict people’s general moral character. However, using physiognomy alone leaves a character’s history, motivations, and deep emotions as indecipherable as the parts of the bottle’s message where the ink …

Go to article

Focusing Of High-Amplitude Sound Waves Using The Time Reversal Process, Brian D. Patchett Dec 2022

Focusing Of High-Amplitude Sound Waves Using The Time Reversal Process, Brian D. Patchett

Theses and Dissertations

Time reversal is a method often used to focus sound to a desired location, and works best in a reverberant environment. The effect of focus location within a reverberant environment is presented first, revealing that proximity to reflecting surfaces has a significant effect on the amplitude of the focus both experimentally and when using a modal summation model. These effects are a primary component to creating focus signals at high amplitudes. High-amplitude focusing experiments show that when multiple sources are used simultaneously to generate a focus, a peak amplitude pressure spike of 200 dB can be achieved in air. A …

Go to article

Coaches Supporting Teachers Reluctant To Implement Intervention Instruction: The Role Of Reflection, Elizabeth Cutrer, Erica E. Miller Dec 2022

Coaches Supporting Teachers Reluctant To Implement Intervention Instruction: The Role Of Reflection, Elizabeth Cutrer, Erica E. Miller

Faculty Publications

No abstract provided.

Go to article

First Prev Next Last