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Articles 1531 - 1560 of 11651
Full-Text Articles in Entire DC Network
Multi-Material 3d-Printed Silicone Vocal Fold Models, Clayton Adam Young
Multi-Material 3d-Printed Silicone Vocal Fold Models, Clayton Adam Young
Theses and Dissertations
Self-oscillating synthetic vocal fold (VF) models are often used to study human voice production. In this thesis, a method for fabricating multi-layer self-oscillating synthetic VF models using silicone 3D printing is presented. Multi-material 3D printing enables faster fabrication times with more complex geometries than traditional casting methods and builds a foundation for producing VF models with potentially more life-like geometries, materials, and vibratory characteristics. The printing method in this study used a custom dual extruder and slicing software to print UV-curable liquid silicone into a gel-like support matrix. The extruder was fabricated using high-torque stepper motors with high resolution leadscrews …
A Visual Focus On Form Understanding, Brian Lafayette Davis
A Visual Focus On Form Understanding, Brian Lafayette Davis
Theses and Dissertations
Paper forms are a commonly used format for collecting information, including information that ultimately will be added to a digital database. This work focuses on the automatic extraction of information from form images. It examines what can be achieved at parsing forms without any textual information. The resulting model, FUDGE, shows that computer vision alone is reasonably successful at the problem. Drawing from the strengths and weaknesses of FUDGE, this work also introduces a novel model, Dessurt, for end-to-end document understanding. Dessurt performs text recognition implicitly and is capable of outputting arbitrary text, making it a more flexible document processing …
The Christian Approach To Psychology, Preston Keller
The Christian Approach To Psychology, Preston Keller
Student Works
This article analyzes the implications of the current worldview of contemporary psychology and demonstrates that these implications are not compatible with the worldview of a Christian approach to psychology. The contrast between Greek Naturalism and Hebrew Theism are presented as the historical foundations for the worldviews of contemporary psychology and Christianity, respectively. The ontological, epistemological, and ethical assumptions of a Christian approach to psychology are explored. The Christian approach to human flourishing, psychopathology, and psychotherapy are contrasted against contemporary psychology's approach to these three areas. The article concludes by suggesting that the field of contemporary psychology should make space for …
Latest Research In Africa
Journal of Nonprofit Innovation
See the latest research in Africa relating to social impact.
Full Issue - Africa
Journal of Nonprofit Innovation
What is the latest research in Africa related to nonprofits and social impact? Read about the latest research and statistics in Africa along with trusted nonprofits working in Africa.
Assessing Our Digital Asset Management System (Contentdm) From The Undergraduate Patron Perspective, Lindsey Memory, Abby Beazer, Rebecca A. Wiederhold, Brent Ellingson
Assessing Our Digital Asset Management System (Contentdm) From The Undergraduate Patron Perspective, Lindsey Memory, Abby Beazer, Rebecca A. Wiederhold, Brent Ellingson
Faculty Publications
COVID underscored the desire of the student population to access library and special collections materials online. After two decades of hosting BYU’s digitized content in the digital asset management system CONTENTdm, we decided in summer 2021 to evaluate its interface for ease of use and reliability. We wanted to determine how our system was performing for an undergraduate population specifically, and to understand the typical undergraduate students’ experience searching for and accessing digitized materials. Our study involved the use of Gen-Z student researchers, who observed undergraduate patrons via a Zoom screenshare. These patrons performed a variety of user tasks and …
House Of El Book 1: The Shadow Threat, Natalie Hatch
House Of El Book 1: The Shadow Threat, Natalie Hatch
Children's Book and Media Review
In this graphic novel, Gray introduces a society that has been genetically engineering the next generations for hundreds of years. As the first book in the series, an introduction to the culture, expectations, and social roles are explored, with a small start into a storyline about the weaknesses of genetic engineering. Gray looks at the downside that comes with generations of alterations, to the point that individuals become blind followers and believers with no sense of self-preservation. The futuristic dystopia is brought to life with Zawadzki’s illustrations, where the coloring is linked with the houses of the characters being represented. …
Full Issue, Various Reviewers
Investigation Of Skid Resistance On Asphalt Pavements In Utah, Aaron B. Smith
Investigation Of Skid Resistance On Asphalt Pavements In Utah, Aaron B. Smith
Theses and Dissertations
Friction is one of the essential aspects of pavement performance and safety. Unfortunately, the rate at which the friction data are being collected exceeds the rate at which the data can be proficiently analyzed. Furthermore, the Utah Department of Transportation (UDOT) lacks long-term trend analysis for the many years of locked-wheel skid trailer (LWST) data collected in Utah. In addition, UDOT is missing a statistically adequate correlation equation between friction-testing devices. Likewise, only one method is used in Utah to prequalify aggregates for use in pavements. Finally, there has not been an investigation of the potential use of lithium silicate …
Disproportionate Exposure To Air Pollution For Low-Income Communities In The United States, Elisabeth Currit
Disproportionate Exposure To Air Pollution For Low-Income Communities In The United States, Elisabeth Currit
Ballard Brief
While air pollution is a major problem in much of the United States, individuals of low socioeconomic status are disproportionately exposed to air pollution compared to wealthier individuals.1 Contributing factors to the problem of disproportionate exposure to air pollution for low-income communities in the United States include lack of emissions regulations and enforcement, disproportionate placement of pollution sources nearby low-income neighborhoods, and the excessive political power of large emitters. The negative consequences that low-income individuals suffer because of this include both physical and mental health as well as impaired cognitive function. NGOs and other organizations are creating programs to help …
Large Eddy Simulation Of The Wakes Of Three Urban Air Mobility Vehicles, Denis-Gabriel Caprace, Andrew Ning
Large Eddy Simulation Of The Wakes Of Three Urban Air Mobility Vehicles, Denis-Gabriel Caprace, Andrew Ning
Faculty Publications
Recent advances in urban air mobility have driven the development of many new VTOL concepts. These vehicles often feature original designs and futuristic shapes. Due to their novelty, the wake characteristics of such aircraft are unknown. However, large wake-induced velocities, should they exist, may be dangerous for any other vehicle evolving in their close proximity. Therefore, improved knowledge about the wakes of VTOL vehicles is needed to guarantee the safety of urban air mobility operations. In this work, we study the wake of three VTOL aircraft in cruise by means of large eddy simulation. We present a two-stage numerical procedure …
Pancho Villa In The Mormon Colonies, Hope Jones
Pancho Villa In The Mormon Colonies, Hope Jones
Final Projects
stories about Pancho Villa in the Mormon Colonies of Mexico during the Mexican Revolution.
Dealing With Duendes, Charles Granger
Dealing With Duendes, Charles Granger
Final Projects
Stories of Mexican duendes (elves).
Acoustofluidics For Simultaneous Nanoparticle-Based Drug Loading And Exosome Encapsulation, Zeyu Wang, Joseph Rich, Nanjing Hao, Yuyang Gu, Chuyi Chen, Shujie Yang, Peiran Zhang, Tony Jun Huang
Acoustofluidics For Simultaneous Nanoparticle-Based Drug Loading And Exosome Encapsulation, Zeyu Wang, Joseph Rich, Nanjing Hao, Yuyang Gu, Chuyi Chen, Shujie Yang, Peiran Zhang, Tony Jun Huang
Faculty Publications
Nanocarrier and exosome encapsulation has been found to significantly increase the efficacy of targeted drug delivery while also minimizing unwanted side effects. However, the development of exosome-encapsulated drug nanocarriers is limited by low drug loading efficiencies and/or complex, time-consuming drug loading processes. Herein, we have developed an acoustofluidic device that simultaneously performs both drug loading and exosome encapsulation. By synergistically leveraging the acoustic radiation force, acoustic microstreaming, and shear stresses in a rotating droplet, the concentration, and fusion of exosomes, drugs, and porous silica nanoparticles is achieved. The final product consists of drug-loaded silica nanocarriers that are encased within an …
Performance Of Resin Injection Ground Improvement In Silty Sand Based On Blast-Induced Liquefaction Testing In Christchurch, New Zealand, David Harold Blake
Performance Of Resin Injection Ground Improvement In Silty Sand Based On Blast-Induced Liquefaction Testing In Christchurch, New Zealand, David Harold Blake
Theses and Dissertations
Polyurethane resin injection is a treatment being considered as a replacement for traditional methods of ground improvement. It has been used to re-level foundations and concrete slabs that have settled over time. Additional claimed benefits of the treatment have been noted recently, including improved factors of safety against soil liquefaction and reduced earthquake-induced settlements. To investigate the capability of the polyurethane resin injection treatment to mitigate liquefaction, two full-scale blast liquefaction tests were performed; one test was conducted in an improved panel (IP), an 8 m circular area treated with the polyurethane resin in a 1.2 m triangular grid from …
Characterizing Equivalence And Correctness Properties Of Dynamic Mode Decomposition And Subspace Identification Algorithms, Samuel Gregory Neff
Characterizing Equivalence And Correctness Properties Of Dynamic Mode Decomposition And Subspace Identification Algorithms, Samuel Gregory Neff
Theses and Dissertations
We examine the related nature of two identification algorithms, subspace identification (SID) and Dynamic Mode Decomposition (DMD), and their correctness properties over a broad range of problems. This investigation begins by noting the strong relationship between the two algorithms, both drawing significantly on the pseudoinverse calculation using singular value decomposition, and ultimately revealing that DMD can be viewed as a substep of SID. We then perform extensive computational studies, characterizing the performance of SID on problems of various model orders and noise levels. Specifically, we generate 10,000 random systems for each model order and noise level, calculating the average identification …
How Trains Work, Jennifer Haltli
How Trains Work, Jennifer Haltli
Children's Book and Media Review
It all began with two wooden rails and a horse-drawn mine cart—these would ignite a technology that utterly transformed mankind. On, above, and below the ground, trains connect to tracks in various ways and are powered by wood, diesel, and electricity. The purposes of trains are highly varied. Some take passengers between cities or across continents. One train in England even carries passengers only 128 feet from a clifftop to the beach. When trains are combined with other mediums of travel, like ferry boats, bridges, and undersea tunnels, train limits disappear. Also, the ever-changing train station is the stuff of …
Future Engineer, Amanda Morgan
Future Engineer, Amanda Morgan
Children's Book and Media Review
Engineers do a lot of things. They fix things, they build things, and they learn from their mistakes. Baby may not be an engineer yet, but Baby can do these things. Baby can ask questions and help others and do all sorts of other things to see what it might be like to be an engineer.
Full Issue, Various Reviewers
Crossing On Time: Steam Engines, Fast Ships, And A Journey To The New World, Maryn Wheeler
Crossing On Time: Steam Engines, Fast Ships, And A Journey To The New World, Maryn Wheeler
Children's Book and Media Review
The SS United States was built for crossings—the crossings of oceans, the crossings of people’s paths, and the crossings of technological limits. The designer and engineer, William Francis Gibbs, dreamed of building the fastest and safest steamship. A passenger, young David Macaulay, dreamed of seeing the Empire State Building as he immigrated with his family to the United States. Their two stories, as well as a century’s worth of industrial ship history, converge with the 1957 Atlantic crossing of the SS United States from Southampton to New York City. Macaulay narrates his personal stories of adventure and Gibbs’s triumphs alongside …
Full Issue, Various Reviewers
Parker Bell And The Science Of Friendship, Sarah Rawle
Parker Bell And The Science Of Friendship, Sarah Rawle
Children's Book and Media Review
Parker Bell absolutely loves science, and she is thrilled when she finds out that the school is holding a science triathlon. But when her best friend Cassie invites Theo to be on their team, Parker thinks Theo might completely ruin their chances of winning. Theo had been Parker’s science partner in second grade, where, in an experiment, they could never get anything to sink or float. Not only is Parker’s chance of ever becoming like her idols, Jane Goodall and Mae Jemison, slipping away, but she’s not too thrilled about the idea of sharing Cassie with Theo. But if she …
Clackety Track Poems About Trains, Ellen Mccarty
Clackety Track Poems About Trains, Ellen Mccarty
Children's Book and Media Review
Whoot! Whoot! All aboard for a timeless trip to the trainyard. Clackety Track: Poems About Trains gives us thirteen different charming poems about trains. “Look close—not every train’s the same. Let’s see how many we can name.” They come in all shapes and sizes, from freight to underground train, steam engines to bullet train, sleeper train and dinner cars. Watch out for the train snow plow! This book certainly has it right, “There’s nothin’ plain about a train.”
Full Issue, Various Reviewers
How Brazilians Used Media To Cope With The Issues Brought By The Covid-19 Pandemic, Vivian De Melo Campos
How Brazilians Used Media To Cope With The Issues Brought By The Covid-19 Pandemic, Vivian De Melo Campos
Theses and Dissertations
Due to the COVID-19 pandemic, the world faced lockdown and quarantine restrictions that encouraged or forced people to stay home. Along with the rest of the world, Brazil faced many difficulties during this period and it became one of the countries that lost more lives due to the Coronavirus infection worldwide. This study focuses on showing how people in Brazil coped with the challenges brought by the pandemic. It also focuses on showing if and how participants used media as a coping mechanism. The research was done through qualitative methods with semi-structured interviews with 25 adults who were living in …
Improving Predictions Of Vapor Pressure, Liquid Heat Capacity, And Heat Of Vaporization In Associating Fluids, Joseph C. Bloxham
Improving Predictions Of Vapor Pressure, Liquid Heat Capacity, And Heat Of Vaporization In Associating Fluids, Joseph C. Bloxham
Theses and Dissertations
Vapor pressure, heat of vaporization, and liquid heat capacity are linked through fundamental thermodynamic relationships. These related properties are essential for the safe design of many industrial processes, and measurement and prediction of these properties remains an essential part of modern thermodynamics research. DIPPR uses the fundamental relationships connecting these properties as a prediction method for all three, referred to as "the derivative method." DIPPR regards values predicted using the derivative method as highly accurate, even when compared to more traditional predictions. Despite the widespread interest in improving understanding of these properties, many questions remain regarding their prediction. Foremost among …
Evaluating Ramp Meter Wait Time In Utah, Tanner Jeffrey Daines
Evaluating Ramp Meter Wait Time In Utah, Tanner Jeffrey Daines
Theses and Dissertations
The purpose of this research was to develop an algorithm that could predict ramp meter wait time at metered freeway on-ramps throughout the state of Utah using existing loop detector systems on the ramps. The loop detectors provided data in 60-second increments that include volume, occupancy, and the metering rate. Using these data sources, several ramp meter queue length algorithms were applied; these predicted queue lengths were then converted into wait times by using the metering rate provided by the detector data. A conservation model and several variations of a Kalman filter model generated predicted queue lengths and wait times …
Assessing Augmented Reality Instruction In Manufacturing Engineering Education, Janine Draper Price
Assessing Augmented Reality Instruction In Manufacturing Engineering Education, Janine Draper Price
Theses and Dissertations
Augmented Reality (AR) is fast-growing technology that has proved itself in many applications, including manufacturing environments. Manufacturing engineers benefit in an industrial environment by harnessing this technology in the workplace to guide workers through a variety of tasks. It is no longer a question on whether it is useful, but what are the best ways of applying the technology. Currently there are no published studies on ways to use augmented reality in a Manufacturing Engineering Educational Environment (MEEE). This study examines various ways that AR can be used in an MEEE setting and assesses the value of such applications. This …
Prediction Of Springback In Aa6016-T4 Sheets Using Isotropic Finite Element And Epsc Modeling Approaches, Dane Roger Sargeant
Prediction Of Springback In Aa6016-T4 Sheets Using Isotropic Finite Element And Epsc Modeling Approaches, Dane Roger Sargeant
Theses and Dissertations
Strain path changes are common in complex automotive stampings, where sheet materials undergo a combination of drawing, stretching, and bending to achieve a desired part shape. Aluminum sheet alloys are increasingly used in vehicle structure light-weighting efforts, but limited formability and high levels of springback present challenges to the manufacturing and assembly processes. The current work explores springback levels in AA6016-T4 sheet after various pure bending operations, where sheets were first pre-strained in uniaxial, plane-strain, and biaxial tension. Finite element modeling of the pre-straining and subsequent bending operations will be performed using both isotropic and elasto-plastic self-consistent (EPSC) crystal plasticity …
Efficacy Of Social Media Analysis As A Service (Smas) For Crisis Events, Rohit Kumar Khattar
Efficacy Of Social Media Analysis As A Service (Smas) For Crisis Events, Rohit Kumar Khattar
Theses and Dissertations
Social media data can be collected and analyzed during and after crisis events to aid in disaster relief efforts. Setting up a system to perform this analysis is associated with various technical challenges. This thesis presents the design and implementation of a social media analysis as a service system. This system is hosted on cloud infrastructure and allows for on demand collection, processing, and delivery of social media data via an intuitive web interface. The service model and cloud infrastructure allow the system to be highly scalable and produce near real time analysis data. A cost evaluation of the system …