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Articles 3001 - 3030 of 74075
Full-Text Articles in Entire DC Network
A Novel Wrench Decomposition And Development Of A Large-Scale Soft Robot For Displacement-Based Human-Robot Collaborative Manipulation, Dallin Cordon
A Novel Wrench Decomposition And Development Of A Large-Scale Soft Robot For Displacement-Based Human-Robot Collaborative Manipulation, Dallin Cordon
Theses and Dissertations
This work represents an examination of various facets of physical human-robot collaborative manipulation and the implementation of compliant, soft-robotic manipulators. A survey of physical human-human interaction and haptic communication is presented, alongside an investigation into the decomposition of force and torque components that enable effective human-robot collaboration. To address the inconsistent terminology found in previous literature, a standardized framework for force decomposition is proposed. A new taxonomy is introduced to categorize the force components involved in collaborative manipulation tasks. This taxonomy clarifies the role of each component in an agent's applied force during task execution and provides a structured framework …
Testing And Modeling Of Nonlinearities In Riveted And Bolted Structures, Joshua E. Blackham
Testing And Modeling Of Nonlinearities In Riveted And Bolted Structures, Joshua E. Blackham
Theses and Dissertations
Joints are difficult to model because of various small-scale and nonlinear features, such as local geometry, preload, friction and contact. These features cause a local change in stiffness and energy dissipation which result in changes in the effective natural frequency and damping of the whole structure. Past studies have found good success using nonlinear Iwan elements as whole joint models for bolted joints in a few different structures. In Chapter 3, a similar approach is proposed for modeling riveted joints, which seeks to capture the vibrational response of a test structure including changes in the effective modal frequency and damping …
Wind Collapse Risk And Serviceability Drift Of Steel Concentrically Braced Frame Buildings, Sarah Corrinne Partington Cluff
Wind Collapse Risk And Serviceability Drift Of Steel Concentrically Braced Frame Buildings, Sarah Corrinne Partington Cluff
Theses and Dissertations
Seismic design provisions use the ductility and reserve strength of the lateral structural system to reduce the loads used in design, making the structural design more economical while maintaining life safety. In contrast, current wind design provisions do not. Conventional wind design relies primarily on elastic behavior. The objective of this study is to determine a wind response modification factor for steel concentrically braced frames that could be applied to reduce wind design loads based on ductility and reserve strength, while still meeting drift requirements for serviceability of the structure. To achieve the objective, three types of ductile braced frames …
"Our Darker Purpose": Jean-François Ducis's Le Roi Léar In Eighteenth-Century France, Zerin Biehn
"Our Darker Purpose": Jean-François Ducis's Le Roi Léar In Eighteenth-Century France, Zerin Biehn
Theses and Dissertations
Jean-François Ducis's French adaptation of Shakespeare's King Lear has received little critical attention since its publication in 1784. The play retains many of the main plot points that are familiar from Shakespeare along with Ducis's changes that helped make Shakespeare and King Lear more acceptable for the French stage. John Golder has interpreted Le Roi Léar as a pro-royalist play, but I argue that the play's portrayal of kingship and treason is much more nuanced. Ducis's Cordelia is framed for rebellion by her oldest sister, a situation which lacks the rich ambiguity of Shakespeare's Cordelia refusing to placate her father …
From Casa To Career: Language Domains Of Adolescent Heritage Spanish Speakers In The United States, Rachel Emily Koncurat
From Casa To Career: Language Domains Of Adolescent Heritage Spanish Speakers In The United States, Rachel Emily Koncurat
Theses and Dissertations
Adolescence is a critical time for identity development. At this stage, it is important that heritage speakers hear positive messages about their heritage language and have programs that meet their linguistic needs and aspirations. This thesis examines the sociolinguistic domains in which adolescent heritage Spanish speakers use English and Spanish. It addresses two key questions: 1) In what domains do adolescent heritage Spanish speakers use English and Spanish? 2) Do these domains align with the future contexts in which they wish to use Spanish? To answer these questions, I distributed an online survey about language domains and future language goals …
Steps Towards Effective Human-Robot Co-Manipulation Through Real-Time Modus Detection And Effects Of Stiffness Variation For Human-Soft-Robot Dyads, Shaden Moss
Theses and Dissertations
A group of individuals can coordinate very easily to carry a large or heavy object together. This act of collaborative carrying is called co-manipulation. Unlike human teammates, robots cannot easily detect and respond to the intent of human partners during co-manipulation tasks. This shortcoming can be compensated for via the physical design and the software design of robots. This work treats software design with a neural net that detects human modus (or the manner in which a team moves an object together) in real time. This work treats physical design with the use of a soft robot in human-robot co-manipulation, …
Improving Devices To Measure The Thermal Conductivity Of Molten Halide Salts, Ryan J. Ruth
Improving Devices To Measure The Thermal Conductivity Of Molten Halide Salts, Ryan J. Ruth
Theses and Dissertations
Molten salts are of high interest for use in nuclear reactors, though their thermophysical properties are notoriously hard to measure due to the extreme conditions created by them. Significant gaps remain in thermal conductivity and heat capacity data, which this work seeks to fill by improving the Needle Probe-a modified transient hot wire probe originally used by Merritt et al to measure the thermal conductivity of FLiNaK- measuring two new salts, and exploring new materials for use with molten salts. Improvements made to the Needle Probe include automation to reduce human error, more accurate heat generation modeling, a more thorough …
Strength And Ductility Of Rod-Braced Diaphragms In Metal Building Systems Subjected To Earthquake Ground Motions, James Niedens
Strength And Ductility Of Rod-Braced Diaphragms In Metal Building Systems Subjected To Earthquake Ground Motions, James Niedens
Theses and Dissertations
Metal building systems are a common form of construction but the behavior of roof diaphragms in metal buildings that are subjected to earthquake ground motions is not entirely understood. In this study, the strength and ductility of rod-braced diaphragms with hillside washer connections or rod-pad connections was determined using experimental tests and computer simulation. Tensile tests of rods were used to determine the effect of the type of rod on strength and ductility. Two types of rods were tested, full-body rods with cut threads at each end of the rod and bracing rods with rolled threads. Three rod sizes (5/8 …
A Levinasian Investigation Of Leaders Learning Humility, Spencer Fumio Yamada
A Levinasian Investigation Of Leaders Learning Humility, Spencer Fumio Yamada
Theses and Dissertations
This dissertation examines the development of humility in individuals and business organizations. Humility in business leadership has received increased attention in recent years; however, little is known regarding how individuals and organizations become more humble. The first article in this dissertation is a theoretical examination of humility and argues that the philosophy of ethicist and phenomenologist Emmanuel Levinas provides a theoretical lens by which the development of humility could be productively explored. Levinas argued that the human experience is based on the ethical responsibility that individuals have towards one another, providing a set of assumptions for an examination of professional …
Supporting Female Nontraditional Students In Higher Education: Exploring Instructors And Instructor Leads' Experiences, Adriana Alba
Supporting Female Nontraditional Students In Higher Education: Exploring Instructors And Instructor Leads' Experiences, Adriana Alba
Theses and Dissertations
Women nontraditional students--defined as those who are over 25, delay college enrollment after high school, attend part-time, have dependent children, are single parents, work full-time while studying, or are financially independent--face unique challenges balancing academic pursuits with family and professional responsibilities in online education, yet research on effective support practices remains limited. This study examined the experiences of six BYU-Pathway Worldwide instructors and instructor leads (four instructors and two instructor leads) who support predominantly women nontraditional students in online courses. Using interpretative phenomenological analysis (IPA) of in-depth interviews and follow-up conversations, the research explored how instructors navigate supporting these students. …
Integrating Temperature-Dependent Tissue Properties Into Hifu Computational Models For Enhanced Treatment Planning, Christian Kevin Valencia Narva
Integrating Temperature-Dependent Tissue Properties Into Hifu Computational Models For Enhanced Treatment Planning, Christian Kevin Valencia Narva
Theses and Dissertations
Objective: High-intensity focused ultrasound (HIFU) is a non-invasive therapy that ablates diseased tissues with high precision. Computational simulations using the Pennes Bioheat Transfer Equation (PBTE) can guide HIFU treatment by predicting temperature distributions and thermal dose volumes. Traditional simulations assume constant thermal and acoustic properties, which may oversimplify tissue behavior. Methods: This study evaluates the impact of integrating temperature-dependent thermal properties (thermal conductivity, specific heat capacity, and perfusion) in finite-difference time-domain HIFU simulations. Three scenarios were simulated: (1) a homogeneous liver with both high- and low-power sonications, (2) a rabbit thigh muscle validated against preclinical MRTI data, and (3) an …
Development Of A Qualitative Spot Assay For Zinc Detection In Fortified Cereal Grain Matrices, Ashley L. Lamborn
Development Of A Qualitative Spot Assay For Zinc Detection In Fortified Cereal Grain Matrices, Ashley L. Lamborn
Theses and Dissertations
The present thesis is a compilation of a literature review, journal manuscript, and two standard operating procedures (SOP) on the qualitative determination of zinc in fortified cereal grain products and matrices. The literature review addresses the premise of the research as well as potential solutions for the development of a rapid qualitative spot assay for zinc determination. Quality assurance assays affirm the presence of micronutrients in food fortification initiatives, but no rapid qualitative spot methods for the assessment of zinc currently exist. Chromogenic reagents that may perform a key role in the rapid determination of zinc are identified. The journal …
Development And Evaluation Of Canbench: A Testbed For Assessing The Security Of Automotive Can Buses, Trevor S. Mcclellan
Development And Evaluation Of Canbench: A Testbed For Assessing The Security Of Automotive Can Buses, Trevor S. Mcclellan
Theses and Dissertations
Modern vehicles rely heavily on electronic control units (ECUs) that communicate via the controller area network (CAN) bus, a protocol developed in the 1980s with minimal security considerations. The growing number of ECUs has heightened the risk of cyberattacks on vehicles. Although CAN bus security has been extensively researched, the CAN standard still lacks built-in security measures. Furthermore, testing proposed security mechanisms is challenging due to the proprietary nature of automotive systems. To address this, an open-source physical testbed was developed using inexpensive, off-the-shelf components to support automotive CAN bus security research. The testbed provides a controlled environment for simulating …
Reservoir Characterization And Basin Modeling Of Mesozoic Siliciclastic Strata For Sedimentary Geothermal Exploration, Iron County, Utah, Theodore L. Morgan
Reservoir Characterization And Basin Modeling Of Mesozoic Siliciclastic Strata For Sedimentary Geothermal Exploration, Iron County, Utah, Theodore L. Morgan
Theses and Dissertations
The transition zone between the Colorado Plateau and Basin and Range provinces of southwestern Utah provides excellent opportunities for future geothermal resource development. A combination of large fault-controlled extensional basins with outcrop analogs along basin margins, an elevated heat flow and thermal regime and the presence of porous and permeable sedimentary formations within extensional sedimentary basins allow for sedimentary geothermal exploration and development. Utilizing a reservoir-centered approach has the potential to dramatically expand the economic limits of geothermal plays in both established and frontier basins. This study characterizes a sedimentary geothermal system in Iron County Utah, centered on the Escalante …
Analysis Of Nitrogen Accumulation And Gene Expression In Hydroponically-Grown Chenopodium Genotypes, Teal Kalt
Analysis Of Nitrogen Accumulation And Gene Expression In Hydroponically-Grown Chenopodium Genotypes, Teal Kalt
Theses and Dissertations
Nitrogen (N) is an essential macronutrient required by all plants to complete their life cycles. Inefficient N uptake contributes to over fertilization and subsequent environmental and sustainability issues resulting in the need for improved nitrogen use efficiency (NUE). Chenopodium quinoa is a resilient pseudocereal crop that is relatively adapted to N-deficient soils. Previous studies have uncovered the unique genetic structure of quinoa and its physiological responses to N availability; however, gaps remain in understanding its molecular mechanisms for NUE. This study investigates four quinoa genotypes (Real-1, 0654, KU-2, and QQ74) hydroponically grown in N-deficient conditions. RNA sequencing (RNA-seq) analysis identified …
Aesthetics In Instructional Design, Dennis M. West
Aesthetics In Instructional Design, Dennis M. West
Theses and Dissertations
This multi-article dissertation examines how aesthetics enhances instructional design to foster engaging, transformative learning experiences. Despite its potential, aesthetics is often granted a secondary status in design practice, being seen as less important than functionality. The first article explores philosopher Monroe Beardsley's five aesthetic criteria--object-directedness, felt freedom, detached affect, active discovery, and wholeness--through a theoretical literature review, proposing their application to elevate learner engagement and interest. The second article, a qualitative investigation, analyzed the Cybermatics Playable Case Study (PCS; a cybersecurity simulation) from the perspective of Beardsley's aesthetic criteria. This investigation involved four students and two designers interviewed hermeneutically over …
Analysis Of Radial Inlet Distortion On Transonic Fan Performance, Tyler M. Reedy
Analysis Of Radial Inlet Distortion On Transonic Fan Performance, Tyler M. Reedy
Theses and Dissertations
Improving fan design and performance prediction requires an understanding of the impacts of inlet distortions. Inlet distortion describes any non-uniform distribution in the flow, usually referring to deviations in pressure and temperature. Using full annulus Unsteady Reynolds-Averaged Navier Stokes (URANS) simulations, the effects of both hub and tip radial distortions on the Air Force Research Lab (AFRL) Rotor 4 fan are analyzed. Overall performance, total pressure (Pt) distortion transfer, and total temperature (Tt) distortion generation are presented and compared for three operating points: near-stall, design, and choke. Hub radial inlet distortion magnitudes of 15% and 20%, and a tip radial …
Data Quality And Enterprise Architecture: An Analysis Of The Awareness And Knowledge Of Data Quality Artifacts, Principles, Practices, And Application In Enterprise Architecture, Jason Alan Minton
Theses and Dissertations
Enterprise Architecture (EA) is a discipline, approach, and practice that aims to align the enterprise’s technical infrastructure, strategy, processes, and technology investments with the organization’s strategy to fulfill the mission and vision. Data quality is conformance to data specifications (Talburt, 2015, p. 192), and low data quality has significant implications for decisions and outcomes across the enterprise. Scant literature and research exist surrounding the intersection, integration, and impact of data quality within EA practices. This research examines the awareness and understanding of Enterprise Architect and Technology Architect populations regarding data quality concepts, artifacts, and tools. The research aims to answer …
Using Human Computation And Harmonic Expansions For Characterization And Design Of Grain Boundary Networks, Christopher W. Adair
Using Human Computation And Harmonic Expansions For Characterization And Design Of Grain Boundary Networks, Christopher W. Adair
Theses and Dissertations
Grain Boundary Networks (GBNs) are a high-dimensional feature in polycrystalline microstructural materials that are formed from the crystallographic degrees of freedom. This feature affects multiple material properties such as diffusivity, fracture, elasticity, heat transfer, and others. The link between the crystallography and the material properties is called the structure-property linkage, and allows for simulation and design of materials. While it is possible to use the structure-property linkage to design materials for better performance, the high-dimensional nature of the interconnected grain boundaries preclude the use of many common optimization algorithms for efficiency or local minima considerations. This work shows how the …
The Force Will Be With You"¦ Won't It? How In-Groups Grow And Develop Around Fandom Through The Lens Of Star Wars, Joseph R. Wirthlin Jr
The Force Will Be With You"¦ Won't It? How In-Groups Grow And Develop Around Fandom Through The Lens Of Star Wars, Joseph R. Wirthlin Jr
Theses and Dissertations
The creation of Star Wars by George Lucas sparked the creation of a vast universe of films, books, television shows, toys, games, and more. Star Wars fans quickly took the reins, fleshing out the universe Lucas had created in new and exciting ways. Decades after the conclusion of the Original Trilogy, the Prequel Trilogy arrived on the scene, sparking excitement and trepidation among fans of the Original Trilogy. A decade after the Prequel Trilogy concluded and three years following the acquisition of Lucasfilm by The Walt Disney Corporation, the Sequel Trilogy arrived at an even more significant wave of mixed …
"Because He Was A Cripple": Collective Care And The Theory Of Complex Embodiment In Dickens's A Christmas Carol, Briley Wyckoff
"Because He Was A Cripple": Collective Care And The Theory Of Complex Embodiment In Dickens's A Christmas Carol, Briley Wyckoff
Theses and Dissertations
Published in 1843, Charles Dickens's A Christmas Carol planted itself squarely into a society that depended upon physical labor and valued able-bodiedness. The crutch-bearing Tiny Tim is iconized for his angelic nature and positive outlook on his impairment, prompting critical conversation about narrative prosthesis and poster children, yet the other illustrations of disability in the novella are rarely explored. Contrary to the tendency of disability scholars to conclude that A Christmas Carol leans too heavily into the trope of inspirational disability or diminishes disabled agency, Dickens's incorporation of disability actually extends far beyond Tim as each member of the Cratchit …
Building And Understanding Cryptographic Authentication Systems, James S. Conners
Building And Understanding Cryptographic Authentication Systems, James S. Conners
Theses and Dissertations
The security and usability challenges of password-based authentication have driven ongoing research into alternative cryptographic authentication systems. This dissertation explores the design, implementation, and evaluation of authentication mechanisms that enhance security while maintaining usability. Specifically, we investigate the limitations of existing passwordless authentication systems, such as FIDO2, and propose novel solutions that improve account recovery, user mental models, and adoption rates. We introduce Let's Authenticate, a certificate-based authentication system designed to address usability and security concerns inherent in existing models. Through iterative development and empirical studies, we compare this approach against contemporary methods like passkeys and password managers. Additionally, we …
An Analysis Of The Encryption Algorithms Proposed For The Mqtt Protocol On Resource Constrained Iot Devices, John Joseph Keenan
An Analysis Of The Encryption Algorithms Proposed For The Mqtt Protocol On Resource Constrained Iot Devices, John Joseph Keenan
Theses and Dissertations
As more IoT devices are used to gather data and automate devices throughout the world, more security solutions are needed to keep these devices and the data they transmit secure. Many of these devices use the MQTT protocol, which does not encrypt the transferred data by default. The TLS/SSL protocols are the standard proposed solution for encrypting this traffic, but many resource constrained IoT devices do not have enough resources to run these protocols efficiently. Because of this, many other encryption algorithms have been proposed or designed for resource constrained IoT devices running the MQTT protocol, but very limited research …
The Development Of Electroanalytical Methods For Molten Salt Mixtures Under Static And Flowing Conditions, Ranon Fuller
The Development Of Electroanalytical Methods For Molten Salt Mixtures Under Static And Flowing Conditions, Ranon Fuller
Theses and Dissertations
Electroanalytical methods have the potential to characterize molten salt systems in situ, determine physical properties such as diffusion coefficients and standard potentials, and measure kinetic and corrosion rates. Due to experimental difficulties of working with molten salts including high temperatures and high natural convection, transport, kinetic, and corrosion rates, many precise, consistent methods have yet to be established. In this work, we describe methods to precisely calculate standard reduction potentials, characterize molten salt solutions containing multiple lanthanides by reduction potentials and metal deposition mechanisms, calculate the number of electrons exchanged in metal deposition using SWV, calculate diffusion coefficients using CV, …
Investigating The Effects Of Sex And Estrous Cycle On The Incubation Of Cue-Induced Oxycodone Craving, Bhumiben Pradipkumar Patel
Investigating The Effects Of Sex And Estrous Cycle On The Incubation Of Cue-Induced Oxycodone Craving, Bhumiben Pradipkumar Patel
Theses and Dissertations
The overprescription and misuse of opioids like oxycodone has played a significant role in the ongoing opioid crisis. While effective painkillers, drugs like oxycodone are also reinforcing and often misused. While sex and ovarian hormones can impact the analgesic effects of these drugs, the impact of these factors on oxycodone reinforcement are not fully understood. This relationship between ovarian hormones and opioid reward is further complicated by the fact that opioid use can disrupt ovarian hormone levels and produce reproductive cycle irregularities. Using a rat model of drug craving and relapse vulnerability, we found that chronic oxycodone exposure produced reproductive …
The Curse Of El Dorado: How The Californnia Gold Rush Shaped The History Of Hawai'i, Ernesto Coronado
The Curse Of El Dorado: How The Californnia Gold Rush Shaped The History Of Hawai'i, Ernesto Coronado
Theses and Dissertations
In the discourse of Western historiography, we fail to account for the importance of the Hawai’ian Islands. American imperialism did not stop with the occupation of the Pacific Coast but continued into the Pacific. In the mid-nineteenth century, Hawai’i and its monarch, King Kamehameha III, stood at the center of a dispute between Britain, France, and the United States. King Kamehameha III used the California Gold Rush and Hawai’i’s location to his advantage to garner capital and prevent the imperial powers from annexing his kingdom. However, even he knew he could not stop the mass wave of Hawai’ians leaving the …
Toxiverse: An Online Comprehensive Chemical Profiling, Modeling, And Data Analysis Platform, Yitao Shen
Toxiverse: An Online Comprehensive Chemical Profiling, Modeling, And Data Analysis Platform, Yitao Shen
Theses and Dissertations
Massive chemical data is now publicly available through publications and various online databases. However, most online databases only provide data unsuitable for modeling purposes and limited machine learning (ML) modeling for those data. As a public chemical toxicity evaluation tool to resolve these issues, the Toxicology Universe (ToxiVerse) portal hosts curated chemical structures and toxicological/pharmaceutical data of 26,000 compounds which can be used directly for modeling purposes. Furthermore, users can upload chemical datasets to extract all involved bioassays for compounds inside as biological profiles. ToxiVerse also features automatic QSAR modeling of uploaded datasets using multiple chemical descriptors and algorithms provided …
The Process Is The Reform: Examining The Portrait Of A Learner In Nevada, Jeremy Adam Young
The Process Is The Reform: Examining The Portrait Of A Learner In Nevada, Jeremy Adam Young
Theses and Dissertations
To understand the process and substance of the Portrait of a Learner as an educational reform in Nevada through examining the experiences of individuals leading the initiative and to connect what is learned to educational reform in a larger context. A comprehensive literature review was cross-referenced with in-depth interview and focus group results from the Nevada Department of Education and two school districts. This qualitative study might be best described as a purposive, non-randomized study. Fifteen participants, including teachers, administrators, policymakers, and nonprofit professionals participated in interviews and/or focus groups, which were semi-structured. The data were analyzed and organized by …
Reconstruction From Variable Aperture Measurements Using Band-Limited Inversion Algorithms, Harrison C. Garrett
Reconstruction From Variable Aperture Measurements Using Band-Limited Inversion Algorithms, Harrison C. Garrett
Theses and Dissertations
The signal reconstruction process from discrete samples is inherently band-limited due to the limited amount of spectral content in the discrete set of measurements. In the case of 1D sampling using ideal measurements, the maximum bandwidth of regular and irregular sampling is well known using Nyquist and Gröchenig sampling theorems and lemmas, respectively. However, determining the appropriate reconstruction bandwidth becomes difficult when considering 2D sampling geometries, samples with variable apertures, or signal to noise ratio limitations. Instead of determining the maximum bandwidth a priori, this thesis introduces the use of a bandlimited inverse to simultaneously reconstruct a signal and determine …
Faith In Tomorrow: Strategies To Inspire Philanthropic Support For Catholic Schools, Angelo Milicia
Faith In Tomorrow: Strategies To Inspire Philanthropic Support For Catholic Schools, Angelo Milicia
Theses and Dissertations
Philanthropy plays a vital role in sustaining Catholic schools; however, the factors that motivate donors to support these institutions remain an area of ongoing inquiry. This study examines the key influences driving philanthropic giving to Catholic education, exploring the intersection of faith, personal values, institutional trust, and perceived impact on students and communities. Using a mixed-methods approach, the research incorporates survey data from 185 participants and insights from 17 focus group members to identify the primary motivations behind donor support. The findings indicate that religious commitment, personal connections to Catholic education, and belief in the school’s mission are among the …