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Articles 1381 - 1410 of 11651
Full-Text Articles in Entire DC Network
Field Based Study Of Gravel Liquefaction, Jashod Roy
Field Based Study Of Gravel Liquefaction, Jashod Roy
Theses and Dissertations
Characterization and assessment of liquefaction potential of gravelly soil in a reliable cost-effective manner has always been a great challenge for the geotechnical engineers. The typical laboratory investigation techniques have proven to be ineffective for characterizing gravelly soil due to the cost and difficulty of extracting undisturbed sample from gravelly deposits. The traditional in-situ tests like SPT or CPT are not very suitable for gravelly soil because of interference with large size gravel particles which can artificially increase the penetration resistance. The Becker Penetration Test, well known for gravelly soil characterization, is cost-prohibitive for routine projects and is not available …
Analysis Of Using V2x Dsrc Equipped Snowplows To Request Signal Preemption, Samantha Kathleen Lau
Analysis Of Using V2x Dsrc Equipped Snowplows To Request Signal Preemption, Samantha Kathleen Lau
Theses and Dissertations
Dedicated short-range communication (DSRC) systems, a form of vehicle-to-everything (V2X) systems, were placed on Utah Department of Transportation (UDOT) snowplows to request signal preemption. The study took place along five state routes in the Salt Lake City metropolitan area. Snowplows and intersections were equipped with the technology to communicate and process requests for signal preemption. Signal performance and vehicle performance analysis were performed to understand the impacts that snowplows requesting signal preemption had. Signal performance analysis was done to determine how snowplows with V2X systems using DSRC affected signals. Vehicle performance analysis was done to see if plowing and traffic …
The Association Of Psychotherapist Cultural Humility And Client Experiences And Outcomes In Psychotherapy: A Meta-Analysis, Lisa Michelle Scott
The Association Of Psychotherapist Cultural Humility And Client Experiences And Outcomes In Psychotherapy: A Meta-Analysis, Lisa Michelle Scott
Theses and Dissertations
Psychotherapist multicultural competence has been given increasing attention in the field of psychology since the 1970s. However, individuals and communities who are Black, Indigenous, or People of Color are still less likely to attend psychotherapy and often drop out earlier than White clients. These trends highlight the importance of the ongoing research on therapist multicultural competence. There are many multicultural competencies, however, the current study focuses on therapist cultural humility. Specifically, we systematically searched all the current research on the association between cultural humility and client experiences and outcomes in therapy. Our literature search yielded eight studies that met our …
The Effects Of Polymorphisms Of Viral Protein R Of Hiv-1 On The Induction Of Apoptosis In Primary Cells And The Characterization Of Twelve Novel Bacillus Anthracis Bacteriophage, Jacob D. Fairholm
Theses and Dissertations
Viral protein r (Vpr) of Human immunodeficiency virus type 1 (HIV-1) plays an important role in the ability of the virus to infect cells and cause disease. Two polymorphisms to Vpr have been shown to result in differences in disease progression in infected individuals. R36W tends to result in rapid disease progression while R77Q results in long-term non-progression. In order to better understand how these polymorphisms result in these different disease phenotypes, our lab has recently shown that in cell culture, the R36W polymorphism results in increased viral replication and greater induction of cell death. On the other hand, infection …
Simulation Of Crystal Nucleation In Polymer Melts, Pierre Kawak
Simulation Of Crystal Nucleation In Polymer Melts, Pierre Kawak
Theses and Dissertations
Semicrystalline polymers are an important class of materials for their prevalence in today's markets and their desirable properties. These properties depend on the early stages of the polymer crystallization process where a crystal nucleates from the polymer melt. This nucleation process is conventionally understood via an extension of Classical Nucleation Theory to polymers (CNTP). However, recent experimental and simulation evidence points to nucleation mechanisms that do not agree with the predictions of CNTP. Specifically, these experiments suggest a previously unrecognized role of nematic phases in mediating the melt"“crystal transtion. To explain these observations, several new theories of nucleation alternate to …
The Discovery Of Novel 14-3-3 Binding Proteins Atg9a And Ptov1 And Their Role In Regulating Cancer Mechanisms, Colten Mitchell Mcewan
The Discovery Of Novel 14-3-3 Binding Proteins Atg9a And Ptov1 And Their Role In Regulating Cancer Mechanisms, Colten Mitchell Mcewan
Theses and Dissertations
14-3-3 proteins are among a family of phospho-binding proteins that are known to regulate many essential cellular mechanisms. By binding to sites of phosphorylation, 14-3-3s are integrated into multiple signaling pathways that govern critical processes, such as apoptosis, cell cycle progression, autophagy, glucose metabolism, and cell motility. These processes are crucial for tumorigenesis and 14-3-3 proteins are known to play a central role in facilitating cancer progression. In this study, my colleagues and I discover two novel 14-3-3 interacting proteins, ATG9A and PTOV1, that are both vital to essential cellular functions and describe various mechanisms that these two proteins regulate. …
Large-Scale Testing Of Reinforced Lightweight Cellular Concrete Backfill For Mse Walls, Christian E. Lundskog
Large-Scale Testing Of Reinforced Lightweight Cellular Concrete Backfill For Mse Walls, Christian E. Lundskog
Theses and Dissertations
The basic mixture of lightweight cellular concrete (LCC) consists of cement, water, and a stable foaming agent. It is generally classified as having a density of less than 50 pounds per cubic foot (pcf), which is less than both traditional concrete and backfill materials. LCC has gained popularity in construction due to its lightweight, self-leveling, and ease of production and placement. These characteristics have made LCC a popular lightweight backfill material for mechanically stabilized earth (MSE) walls. However, there has been relatively little research on the large-scale behavior of LCC as a MSE backfill. Therefore, large-scale test results defining failure …
Data Assimilation And Parameter Recovery For Rayleigh-Bénard Convection, Jacob William Murri
Data Assimilation And Parameter Recovery For Rayleigh-Bénard Convection, Jacob William Murri
Theses and Dissertations
Many problems in applied mathematics involve simulating the evolution of a system using differential equations with known initial conditions. But what if one records observations and seeks to determine the causal factors which produced them? This is known as an inverse problem. Some prominent inverse problems include data assimilation and parameter recovery, which use partial observations of a system of evolutionary, dissipative partial differential equations to estimate the state of the system and relevant physical parameters (respectively). Recently a set of procedures called nudging algorithms have shown promise in performing simultaneous data assimilation and parameter recovery for the Lorentz equations …
Space-Time Block-Encoded 16-Apsk In Aeronautical Mobile Telemetry, Autumn Twitchell
Space-Time Block-Encoded 16-Apsk In Aeronautical Mobile Telemetry, Autumn Twitchell
Theses and Dissertations
The two-antenna problem in aeronautical mobile telemetry is created by the reception of two copies of the same RF waveform with different phases and time delays. Alamouti and Alamouti-like space time block codes can solve the two-antenna problem, but the decoder/detector needs to account for the different time delays between the signals received from the two transmit antennas. In this thesis, a comparison is made between the performance of Alamouti space-time block codes and time-reversed space-time block codes with 16-APSK to solve the two-antenna problem. The maximum likelihood decoder/detector for Alamouti-encoded 16-APSK is a sequence detector operating on a trellis …
Developing Ultra-High Resolution 3d Printing For Microfluidics, Kent Richard Hooper
Developing Ultra-High Resolution 3d Printing For Microfluidics, Kent Richard Hooper
Theses and Dissertations
Building upon previous research on Digital Light Projection (DLP) 3D printing for microfluidics, in this thesis I performed the detailed design and fabrication of a novel DLP 3D printer to increase resolution and device footprint flexibility. This new printer has a pixel resolution twice that of our group’s previous printers (3.8 μm vs 7.6 μm). I demonstrated a new state of the art for minimum channel width, reducing the minimum width to 15 μm wide (and 30 μm tall). This is an improvement over the previous smallest width of 20 μm. This printer also has the capacity to perform multiple …
Investigations Into Pressure Profile And Pressure Control In Wrist-Worn Health Monitoring Devices, Roger Mcallister Black
Investigations Into Pressure Profile And Pressure Control In Wrist-Worn Health Monitoring Devices, Roger Mcallister Black
Theses and Dissertations
To aid in the design of future wearable health devices (WHDs), contact pressure between the distal forearm (wrist) and two different wrist-worn devices was investigated in this work. The first device included eight force sensors arranged in series along the length of a wristband to measure the pressure profile. The band also included a tensioner device for manually tightening the band while on a wrist. Testing was done on dummy wrists and the results were statistically significant supporting the hypothesis that areas of the wrist with lower radius of curvature will experience higher contact pressures generally and a faster rate …
Design And Characterization Of Phased Arrays For Uas Detection And Tracking, David Buck
Design And Characterization Of Phased Arrays For Uas Detection And Tracking, David Buck
Theses and Dissertations
This work continues the development of phased array radar for UAS detection and tracking. The earlier 1D scanning, 4 channel BYU SAA radar is improved upon and replicated to form a network of radars. These are shown to work together for higher level tracking across multiple fields of view. Additionally, a new phased array instrument is designed and constructed with 16 channels, 2D scanning, and improved signal processing algorithms. Preliminary metrics and field results show the operation of this sensor. A new technique for measuring array mutual impedances from embedded element patterns is developed here. This technique uses an antenna …
Multi-Scale Simulation Of Turbulent Reacting Flow, David O. Lignell
Multi-Scale Simulation Of Turbulent Reacting Flow, David O. Lignell
BYU Research Development Office Research Networking Conference
Simulation, Fire, Turbulence, Soot, Radiation, Software
Smart Seeds - A Platform For Wide Area Land Management, Brian Mazzeo
Smart Seeds - A Platform For Wide Area Land Management, Brian Mazzeo
BYU Research Development Office Research Networking Conference
System and sensor development, Data acquisition, Signal processing, and Non-destructive evaluation of materials
3d Printing For Lab-On-A-Chip, Greg P. Nordin
3d Printing For Lab-On-A-Chip, Greg P. Nordin
BYU Research Development Office Research Networking Conference
3D printed microfluids, biological and chemical sensors, Nanophotonics and integrated optics, Micro- and nanofabrication, MEMS, and Microfluids
Barriology, Dario Mizrachi
Barriology, Dario Mizrachi
BYU Research Development Office Research Networking Conference
Stem cells
2d Additive Manufacturing And Industrial Sustainability, Philippe Passeraub
2d Additive Manufacturing And Industrial Sustainability, Philippe Passeraub
BYU Research Development Office Research Networking Conference
Sensing microsystems and energy harvesting for medical and industrial applications
Civil & Construction Engineering, Darrell Sonntag
Civil & Construction Engineering, Darrell Sonntag
BYU Research Development Office Research Networking Conference
Air quality, Sustainable transportation, Vehicle emissions measurements, Modeling emissions and pollutant formation, Greenhouse gas emissions, Indoor air quality and wildfire smoke
Using Imaging To Understand Achilles Tendon Adaptation And Injury In Female Athletes, Aaron W. Johnson
Using Imaging To Understand Achilles Tendon Adaptation And Injury In Female Athletes, Aaron W. Johnson
BYU Research Development Office Research Networking Conference
Musculoskeletal Imaging, Rehabilitation and Function of the Lower Extremity and Spine, Achilles Tendinopathy/Plantar Fasciopathy, Blood Flow and Perfusion of Foot Structures, Foot Morphology and Function, Hamstring Injury, Physical Therapy, Orthopedics
Using Imaging To Understand Achilles Tendon Adaptation And Injury In Female Athletes, Aaron W. Johnson
Using Imaging To Understand Achilles Tendon Adaptation And Injury In Female Athletes, Aaron W. Johnson
BYU Research Development Office Research Networking Conference
Musculoskeletal Imaging, Rehabilitation and function of the lower extremity and spine, Achilles tendinopathy/plantar fasciopathy, Blood flow and perfusion of foot structures, Foot morphology and function, Hamstring injury, physical therapy, orthopedics
Bacteria In Blood Particles For Drug Delivery, Bill Pitt
Bacteria In Blood Particles For Drug Delivery, Bill Pitt
BYU Research Development Office Research Networking Conference
Biomedical engineering, Drug delivery, Bacteria, Blood particles, Polymers
Smash Lab: Smart Materials In Shock, Jeff Hill
Smash Lab: Smart Materials In Shock, Jeff Hill
BYU Research Development Office Research Networking Conference
Design, modeling and experimental work on protecting systems under harsh mechanical environments such as shock and impact
Multi-Material Additive Manufacturing, Jason Weaver
Multi-Material Additive Manufacturing, Jason Weaver
BYU Research Development Office Research Networking Conference
All areas of additive manufacturing (3D printing), especially Design for AM, Multi-Material AM and Sustainability
Interdisciplinary Sustainability, Andrew South
Interdisciplinary Sustainability, Andrew South
BYU Research Development Office Research Networking Conference
The intersection of the built, social, and natural environments, project stakeholder engagement / management, sustainability and resiliency of structures and infrastructure
Steam Education, Arts Integration, And Academic Achievement Among Native Youth, Mark Graham
Steam Education, Arts Integration, And Academic Achievement Among Native Youth, Mark Graham
BYU Research Development Office Research Networking Conference
Arts Integration, STEAM Education, Tibetan Buddhist Mandalas, Teacher Self-Care, Mindfulness, Self Inquiry and Artmaking, Place-Based Education, Spiritual Dimensions of Creativity, Ecological inquiry in Art and Education
Molten Salt Processing And Electrochemistry, Devin Rappleye
Molten Salt Processing And Electrochemistry, Devin Rappleye
BYU Research Development Office Research Networking Conference
Molten Salt Electrochemistry, Critical metals (rare earths, refractory) production via high-temperature chemistry, Nuclear energy and material processing
Using Machine Learning To Classify Volleyball Jumps, Miki Jauhiainen
Using Machine Learning To Classify Volleyball Jumps, Miki Jauhiainen
Theses and Dissertations
In this study, inertial measurement units (IMUs) were used to train a random forest classifier to correctly classify different jump types in volleyball. Athlete motion data were collected in a controlled setting using three IMUs, one on the waist and one on each ankle. There were 11 participants who at the time played volleyball at the collegiate level in the United States, seven male and four female. Each performed the same number of jumps across the eight jump types--five BASIC jumps and three each of the other seven--resulting in 26 jumps per subject for a total of 286. The data …
Image-Guided Therapies, Steven Allen
Image-Guided Therapies, Steven Allen
BYU Research Development Office Research Networking Conference
Medicine, Medical Imaging, Magnetic Resonance Imaging, Ultrasound, Surgery
Optimization Of Solar-Coal Hybridization For Low Solar Augmentation, Aaron T. Bame, Joseph Furner, Ian Hoag, Kasra Mohammadi, Kody Powell, Brian D. Iverson
Optimization Of Solar-Coal Hybridization For Low Solar Augmentation, Aaron T. Bame, Joseph Furner, Ian Hoag, Kasra Mohammadi, Kody Powell, Brian D. Iverson
Faculty Publications
This work presents a process to determine the preliminary optimal configuration of a concentrating solar power-coal hybrid power plant with low solar augmentation, and is demonstrated on a regenerative steam Rankine cycle coal power plant in Castle Dale, UT, USA (average DNI of 542 W m−2). A representative plant model is developed and validated against published data for a coal power plant. The simplifications that lead to the representative model from a coal power plant model include combining multiple feedwater heaters, combining turbines, and using a mass-average calculation for extraction steam properties. Comparing net power generation and boiler …
In-Situ Chlorine Gas Generation For Chlorination And Purification Of Rare Earth And Actinide Metals, Mark H. Schvaneveldt
In-Situ Chlorine Gas Generation For Chlorination And Purification Of Rare Earth And Actinide Metals, Mark H. Schvaneveldt
Theses and Dissertations
Rare earth and actinide metals, critical to security, medicine, and the economy, have been processed through methods such as solvent extraction and electrorefining. To minimize radiological waste and improve yield, a 'chloride volatility' process--also known as the chlorination and volatilization process (CVP)--has been proposed and demonstrated for processing rare earths. The process takes advantage of the low vapor pressure of rare earth chlorides (<700 >°C), CaCl2 was added to LaCl3 to lower the melting temperature. LaCl3 electrochemical behavior has not previously been studied in CaCl2. Cyclic voltammetry (CV) and square wave voltammetry (SWV) were applied to LaCl3 salts in CaCl2-LiCl …