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Insights Into Supported Metal Catalyst Sintering And Their Application For Bio-Oil And Crude Oil Upgradation, Md Fakhruddin Patwary
Insights Into Supported Metal Catalyst Sintering And Their Application For Bio-Oil And Crude Oil Upgradation, Md Fakhruddin Patwary
Theses and Dissertations
Typical heterogeneous catalysts consist of transition metal nanoparticles anchored against sintering on an inert, porous, high temperature stable support. The synthesis of supported catalyst involves pretreatment (drying, reduction) of deposited, ionic metal precursor complexes to form metal nanoparticles. In the first part of this work, we aim to understand the influence of pretreatment (reduction temperature, heating rate, moisture content) on final particle size. Supported nanoparticles of Pt and Pd were synthesized by strong electrostatic adsorption (SEA) and dry impregnation (DI). Reduced samples were characterized by in-situ and ex-situ XRD and STEM. The DI-derived samples generally showed an expected increase of …
Increasing English Progress Proficiency Of Multilingual Learners Utilizing Improvement Science, Stephanie Corley Huckabee
Increasing English Progress Proficiency Of Multilingual Learners Utilizing Improvement Science, Stephanie Corley Huckabee
Theses and Dissertations
ABSTRACT This problem of practice addresses creating more positive outcomes for multilingual learners in achievement data for English Proficiency Progress matching or exceeding achievement data patterns of the general student population in a suburban middle school. Improvement science is the framework used to help solve this problem. The improvement team consisted of an assistant principal of instruction, a multilanguage learner teacher assigned to this school along with four additional schools, and the principal. The team began their work with the goal of understanding the current system by learning from students, families, and teachers about their experiences with multilingual learning. Potential …
Dephosphorylation Of Mpk6 And Mpk3 By Phosphatases Modulates Responses To Herbivory In Arabidopsis, Claire Teresa Hann
Dephosphorylation Of Mpk6 And Mpk3 By Phosphatases Modulates Responses To Herbivory In Arabidopsis, Claire Teresa Hann
Theses and Dissertations
As sessile organisms, plants rely on extracellular signals and chemical responses to defend against stressors. Extracellular stress signals inducing defense responses originate both from biotic or abiotic threats, and from products of tissue damage or hormones. In defense against herbivores, essential responses include rapid generation of jasmonic acid (JA) at the wound site, followed by the global expression of genes that impede digestion and growth. Early defense gene expression amplifies JA production, while later JA-responsive gene expression causes the accumulation of defense products. MAP kinase (MAPK) pathways play a central role in mediating the perception of self, non-self, and hormonal …
Creative Insights On The Commissioning, Analysis, And Performance Of Four New Works For Saxophone, Andrew Joseph Hutchens
Creative Insights On The Commissioning, Analysis, And Performance Of Four New Works For Saxophone, Andrew Joseph Hutchens
Theses and Dissertations
This document explores, in detail, four works for saxophone, which the author commissioned. These pieces were performed on the author’s degree recitals prior to the writing of this document. The selected works are At the Seams by Baljinder Singh Sekhon II, Intrepid by Russell Wharton, Unity Synonym by Michael Laurello, and Third Rail / Revelation by Stephen Karukas. This document focuses on the commissioning process, musical performance, and theoretical aspects of these four pieces. Interviews were conducted virtually via Zoom and then transcribed for inclusion in this document. There have been no previous studies that have explored these four works. …
Floodplain And In-Channel Sedimentation In The Bedrock Congaree River, Sc, Mahsa Ahmadpoor
Floodplain And In-Channel Sedimentation In The Bedrock Congaree River, Sc, Mahsa Ahmadpoor
Theses and Dissertations
The Congaree River planform is characterized by an abrupt increase in channel sinuosity in the downstream direction. Such a change is not typical of alluvial meandering rivers but has been observed in mixed bedrock-alluvial rivers. This motivated the first study of this dissertation, specifically designed to determine if the Congaree River is indeed a mixed bedrock-alluvial river in its low sinuosity (upstream) reach. To test this hypothesis, sonar-based measurements of channel bed and sublayer elevation were performed from Columbia to the Congaree River-Wateree River confluence. The sublayer is here defined as the first surface visible in the sonar measurements underneath …
Particle-Free High Spatial Resolution Velocimetry For Slip Flow Detection, Malhar Prasad Joshi
Particle-Free High Spatial Resolution Velocimetry For Slip Flow Detection, Malhar Prasad Joshi
Theses and Dissertations
Microfluidic systems have a wide range of applications, including biomedical devices, lab-on-a-chip technologies, and aerospace propulsion. Understanding and quantifying the slip flow phenomenon in these microscale and nanoscale channels is of paramount importance for precise control and optimization of fluidic processes. Our study presents a novel approach to directly measure the velocities in a microchannel using Laser Induced Fluorescence Photobleaching Anemometer (LIFPA) and Travel Time After Photobleaching Velocimetry (TTAPV). In this experimental study, microchannels with micrometer dimensions were used, and slip flow conditions controlled. The LIFPA-TTAPV approach was applied to measure slip velocities in the near wall regime, providing accurate …
Decoding Trustworthiness And Helpfulness Of Online Reviews In Hospitality: A Reader-Centric Perspective, Xiaonan Zhang
Decoding Trustworthiness And Helpfulness Of Online Reviews In Hospitality: A Reader-Centric Perspective, Xiaonan Zhang
Theses and Dissertations
Online review is an ongoing popular topic for both researchers and practitioners. Consumers’ decision-making is largely influenced by the online reviews, especially those that are perceived as trustworthy and helpful given the information overload issue and existence of fake reviews. This dissertation consists of three independent but closely related studies focusing on trustworthiness and helpfulness of online reviews in hospitality industry. The objectives of this dissertation are to explore the factors affecting review trustworthiness and helpfulness as identified in previous research and determine their relevance to consumers' real-world reading and decision-making experiences, as well as the impact of message framing …
Perspectives, Motivations, And Resistance: Investigating Employee Responses To Employer-Sponsored Diversity Training, Robert Kerlin
Perspectives, Motivations, And Resistance: Investigating Employee Responses To Employer-Sponsored Diversity Training, Robert Kerlin
Theses and Dissertations
This qualitative action research study investigated employee reactions, motivations, and perspectives toward employer-sponsored diversity training programs. Through a qualitative exploratory case study, this research study explored the perceptions of how a diverse sampling of people individually, negotiate identities in corporate and education fields where those in control must both accommodate and placate in order to maintain institutional objectives. In order to further explore this topic, a theoretical framework consisting of self-determination theory and culturally relevant pedagogy served as the primary method to guide the research question, literature reviews, and data design, collection, and analysis process. Self-determination theory provided the primary …
Eugene O’Neill Returns: Theatrical Modernization And O’Neill Adaptations In 1980s China, Shuying Chen
Eugene O’Neill Returns: Theatrical Modernization And O’Neill Adaptations In 1980s China, Shuying Chen
Theses and Dissertations
After nearly vanishing from the Chinese literary world map for thirty years from 1949 to 1979, Eugene O’Neill’s works underwent a reevaluation and resurgence in the reform era of the 1980s. This decade witnessed a wide range of introductions to, research on, translations, and productions of O’Neill’s play in the Chinese theatrical and cultural landscape. Chinese theater practitioners staged some thirty adaptations of O’Neill’s works in both domains of spoken drama and traditional opera, including productions by colleges, state-owned troupes, and independent theater groups. This dissertation contextualizes some of O’Neill adaptations in the socio-cultural context of the transitional period and …
Polybenzimidazole Membranes For Electrochemical Applications With Harsh Operating Conditions, Kris Likit-Anurak
Polybenzimidazole Membranes For Electrochemical Applications With Harsh Operating Conditions, Kris Likit-Anurak
Theses and Dissertations
Polybenzimidazole (PBI) membranes are high temperature proton exchange membranes (PEMs) which have advantages such as being able to operate in high temperatures, strong acid environments, and have no need for external humidity during operation. PBI membranes have been demonstrated to work effectively in multiple electrochemical devices, including fuel cells, hydrogen separation pumps, redox flow batteries, and a hybrid sulfur electrolyzer. In this work, para-PBI and densified para-PBI membrane have been used to improve electrochemical performance in harsh operating conditions that are both high temperature (≥120 ̊C) and high acid concentration (≥ 5M). First, we demonstrated the use of para-PBI membranes …
Probabilistic Cable Aging Diagnosis And Prognosis With Reflectometry And Capacitance Methods, Xuan Wang
Probabilistic Cable Aging Diagnosis And Prognosis With Reflectometry And Capacitance Methods, Xuan Wang
Theses and Dissertations
Safe and reliable operation of power plants and power transmission are critical to economy and society. Cables in power generation and transmission are subject to various thermal, chemical, and mechanical stresses, which generally lead to aging and degradation of cable insulation. It is reported that some cables with a projected lifetime of 40 years need to be replaced in 10-15 years. Poorly maintained aged cables can adversely affect power delivery and lead to catastrophic events, such as blackout, fires, and loss of lives. The current research on cable is mainly focused on the detection and localization of hard faults, which …
Exploring The Assembly Of Soluble Triphenylamine Bis-Urea Macrocycles; Synthesis Of Nsc243928 Derivatives For Triple-Negative Breast Cancer Treatment, Rahul Prakash
Theses and Dissertations
This dissertation is divided into two topics: I. Supramolecular polymerization of triphenylamine (TPA) bis-urea macrocycle behavior in solution, and II. Synthesis of fluorophore appended and biotinylated derivatives of NSC243928 for the treatment of triple-negative breast cancer. Supramolecular polymers are of interest due to their self-healing and stimuli responsiveness. Chapter 1 gives a brief overview of the importance of self-assembly to construct ordered structures from smaller building blocks, highlighting the mechanisms of self-assembly to form supramolecular polymers. The bis-urea macrocycle assembly unit is introduced and its assembly into tubular structures and crystals is highlighted, which are used as a control for …
Weathering The Covid-19 Pandemic: A Study Examining How The Lived Experience Affected English Learners, Mary Kathryn Maxwell
Weathering The Covid-19 Pandemic: A Study Examining How The Lived Experience Affected English Learners, Mary Kathryn Maxwell
Theses and Dissertations
The COVID-19 pandemic profoundly impacted many students, especially the English learners who require specialized instruction and additional support to develop English language proficiency. This study examines how the pandemic created barriers that caused a decline in the academic achievement and engagement in the learning process of sixth-eighth grade English learners in an urban district in Ohio. In this mixed-methods study, using an explanatory sequential research design, quantitative data were collected through an online Likert survey while qualitative data were gathered from semi-structured interviews, artifacts, and researcher field notes. A total of 21 participants completed the survey and interviews. The merged …
Recovering Lost Exposure From The Majorana Demonstrator And Testing Data Selection Assumptions, Thomas Lannen
Recovering Lost Exposure From The Majorana Demonstrator And Testing Data Selection Assumptions, Thomas Lannen
Theses and Dissertations
The Majorana Demonstrator recently concluded its search for neutrinoless double beta decay using an array of up to 40.4kg of germanium detectors, 27kg of which were enriched in 76Ge and housed inside a copper and lead compact shield located at the 4850 foot level in a clean room in the Davis Campus of the Sanford Underground Research Facility (SURF) in Lead, South Dakota. This search proceeded from June 26, 2015 until March 3, 2021 and 64.5 kg yr of enriched active exposure was acquired while achieving a world leading energy resolution of 0.12% FWHM at 2039 keV, one of …
Water Quality Monitoring And Mapping Using Rapidly Deployable Sensor Nodes, Mohamed Abdelwahab
Water Quality Monitoring And Mapping Using Rapidly Deployable Sensor Nodes, Mohamed Abdelwahab
Theses and Dissertations
Efficient and continuous monitoring of water quality parameters plays a pivotal role in responding to pollution incidents and ensuring the safety of both human consumption and ecological resources. This research introduces an affordable and dependable in-situ water quality sensor package designed for seamless continuous monitoring, providing essential data to facilitate informed decision-making in water resource management. The sensor package enables comprehensive on-site assessment of key water characteristics, including pH, temperature, turbidity (measured in NTU), and total dissolved solids (TDS, measured in ppm). Spatial interpolation techniques, specifically Kriging, are employed to extrapolate variable values at unobserved locations based on nearby measurements. …
Nonparametric Tests Of Interaction For The Two-Way Design With Skewed Distributions, Michael Ethan Hornsby Brown
Nonparametric Tests Of Interaction For The Two-Way Design With Skewed Distributions, Michael Ethan Hornsby Brown
Theses and Dissertations
The most common parametric procedure used to test main and interaction effects in the two- or more-groups factorial design is the analysis of variance (ANOVA) F test. Researchers in the behavioral and social sciences fields require statistical methods that are robust in the presence of deviations from the common parametric ANOVA assumptions of (a) normality, (b) homogeneity of variances among groups, and (c) independence of observations. When there is concern that the parametric assumptions are violated, nonparametric procedures can be employed that do not make as many initial assumptions about the parent populations. Of particular interest in the two-factor design …
Understanding The Corrosion And Discharge Behaviour Of Zinc Anodes In Primary Alkaline Batteries, Brian James Lenhart
Understanding The Corrosion And Discharge Behaviour Of Zinc Anodes In Primary Alkaline Batteries, Brian James Lenhart
Theses and Dissertations
Primary zinc alkaline batteries power a wide array of everyday use electronic devices such as remote controls, calculators, cameras, and flashlights and will own an appreciable share of the battery market for the foreseeable future. Primary alkaline batteries generally utilize carbon, gas diffusion air, or manganese dioxide cathode but always coupled with a slurry zinc anode. There are several issues with this primary alkaline platform, largely emphasized by the performance of the zinc anode, such as a gassing phenomenon which leads to battery rupture and under certain circumstances, low material utilization leading to low energy density. The gassing and material …
Strengthening Teacher Efficacy: An Improvement Science Journey To Support Teachers Post Covid-19 School Closures, Ada Odet Sindab
Strengthening Teacher Efficacy: An Improvement Science Journey To Support Teachers Post Covid-19 School Closures, Ada Odet Sindab
Theses and Dissertations
This dissertation presents the findings of a qualitative improvement science study aimed at identifying an effective professional development structure to enhance teacher efficacy in the context of post-COVID-19 education. The study's approach was guided by a systematic exploration of the problem, facilitated by a driver diagram, which led to the identification of three potential change ideas. Among these ideas, the second change, involving the design of a school master schedule with dedicated time for teacher planning, emerged as the initial step towards achieving the research goal. To operationalize this change, Plan-Do-Study-Act (PDSA) cycles were employed iteratively to develop a tailored …
The Impact Of Differentiated Affective Curriculum On The Asynchronous Social And Emotional Development Of Gifted Elementary Students, Michelle Koehle
The Impact Of Differentiated Affective Curriculum On The Asynchronous Social And Emotional Development Of Gifted Elementary Students, Michelle Koehle
Theses and Dissertations
The purpose of this mixed-method action research study was to support the asynchronous development of third-grade gifted students at GWE by identifying their key social and emotional needs and determining the outcomes of a differentiated SEL curriculum. The four most significant affective areas of social and emotional need as self-reported by the participants on a quantitative pre-survey were emotion regulation, goal management, emotional knowledge, and relationship skills. Qualitative observations and exit tickets were collected to understand participants’ perceptions of the differentiated affective curriculum on their social and emotional development. Quantitative data was collected at the end of the study and …
Unveiling The Lifeworld Of Educators’ Social Justice Journeys: A Phenomenological Investigation, Maria Rocas Halkias
Unveiling The Lifeworld Of Educators’ Social Justice Journeys: A Phenomenological Investigation, Maria Rocas Halkias
Theses and Dissertations
The aim of this qualitative phenomenological action research was to explore the viewpoints of educators participating in a community of practice that integrates the Universal Design for Learning (UDL) framework with culturally responsive teaching and personalized learning. The study involved six teachers from a competitive public school district in New Jersey. Data collection methods encompassed weekly reflections, researcher’s field notes, audio-recorded sessions, and interviews. The study yielded valuable insights into organizational frameworks and learning strategies that enhance educators’ ongoing reflective practices, while also advocating for districts to allocate resources to support teachers' continuous personalized professional development. Analysis of the findings …
Electric Freight Transportation System Planning And Truck Operation Optimizations, Xuanke Wu
Electric Freight Transportation System Planning And Truck Operation Optimizations, Xuanke Wu
Theses and Dissertations
The substantial demand for fossil fuel consumption is a significant contributor to greenhouse gas emissions, drawing considerable public attention to health and environmental problems. As a result, vehicle electrification is currently recognized as the most effective approach to reduce CO2 emissions from transportation. However, compared to traditional fossil fuel-powered vehicles, electric vehicles have notable disadvantages, including higher upfront purchasing price, longer recharging time, and most significantly, lower driving ranges. All these challenges can potentially result in increased overall operational costs for logistics companies. This thesis proposes a comprehensive optimization modeling framework for electric freight transportation system planning and operations with …
Enhancing Relation Database Security With Shuffling, Tieming Geng
Enhancing Relation Database Security With Shuffling, Tieming Geng
Theses and Dissertations
Database security holds paramount importance as it safeguards an organization's most valuable assets: its data. In an age marked by escalating cyber threats, protecting sensitive information stored in databases is essential to preserve trust, prevent financial losses, and maintain legal compliance. In this dissertation, an exploration into the realm of relation database security is undertaken. The research introduces a cryptographic secure shuffling algorithm designed to fortify database security. Additionally, the dissertation presents a series of innovative solutions aimed at bolstering both the security and efficiency of the shuffling algorithm. Encryption algorithms have long served as a mean of safeguarding sensitive …
Race Dynamics And Mentoring Experiences Of Aspiring Black Principals, Tiwana Richardson Meggett
Race Dynamics And Mentoring Experiences Of Aspiring Black Principals, Tiwana Richardson Meggett
Theses and Dissertations
This study aimed to investigate the dynamics of race and mentorship while capturing the lived experiences of Black principals as they were in the pipeline to the principalship. Although America’s public schools are becoming increasingly more diverse with students of color, the number of principals of color is relatively low; Blacks account for 10.7 % of the principalship, while whites account for 68.1% (School Principal Demographics and Statistics in the US, 2022). This qualitative study used Critical Race Theory (CRT) as a framework to inform the reader of racial trends, dynamics and/or thematic parallels of the participants in the study. …
The Utility Of Bayesian Predictive Models To Forecast Arboviruses In The United States Of America And Territories, Maggie Suzanne Jennave Mccarter
The Utility Of Bayesian Predictive Models To Forecast Arboviruses In The United States Of America And Territories, Maggie Suzanne Jennave Mccarter
Theses and Dissertations
Statistical models have been utilized to understand and forecast infectious diseases across the globe. However, these models have historically been difficult to access and interpret for non-specialist audiences. This dissertation focuses on one computationally efficient model fitting method, the integrated nested LaPlace approximation approach, to forecast three arboviruses in hopes of encouraging accessibility to statistical modelling. Such accessibility could provide areas who simultaneously are most susceptible to infection, and have the least resources, an invaluable tool for informing policy and prevention decisions. The resulting models included biological, land cover, and environmental factors and produced accurate forecasts of neuroinvasive West Nile …
Design And Fabrication Of High-Resolution Epitaxial 4h-Sic Metal Insulator Semiconductor Detectors, Omerfaruk Karadavut
Design And Fabrication Of High-Resolution Epitaxial 4h-Sic Metal Insulator Semiconductor Detectors, Omerfaruk Karadavut
Theses and Dissertations
In the last two decades, significant strides have been made in the epitaxial film growth of 4H-silicon carbide (4H-SiC), establishing it as a premier wide bandgap material for radiation detection application under harsh environments. This is primarily attributed to its unique combination of physical properties such as high thermal conductivity, wide bandgap, robust breakdown field, and radiation hardness. Metal/4H-SiC epitaxial layer Schottky barrier diodes (SBDs) have emerged as reliable radiation detectors for harsh environments. However, the utilization of thicker epitaxial layer devices encounters challenges due to the minimum achievable doping concentration in 4H-SiC epitaxial layers, necessitating higher bias voltages for …
Real-Time Product Structural Validation For Fused Filament Fabrication, Yanzhou Fu
Real-Time Product Structural Validation For Fused Filament Fabrication, Yanzhou Fu
Theses and Dissertations
Fused filament fabrication (FFF) is one of the fastest-growing, most promising, and widely-used Additive manufacturing (AM) technologies, as its capabilities of largely reducing material waste, feasible and flexible designing complicated structure or geometry product. Except for the advantages mentioned above, the unique affordability has made FFF a popular technique for small-scale 3D printing. However, its widescale adaption for industrial applications still faces significant challenges, especially for Industry 4.0, due to the process’s intrinsic uncertainties. During the printing process, even a trivial bonding gap or material void dramatically influences the final product’s structural quality and mechanical properties. Therefore, a defect detection …
Engineering Hybrid Colloidal Systems Formed By Charge-Driven Assembly Between Spherical Soft Nanoparticles And Discotic Nanoplatelets, Gelareh Rezvan
Engineering Hybrid Colloidal Systems Formed By Charge-Driven Assembly Between Spherical Soft Nanoparticles And Discotic Nanoplatelets, Gelareh Rezvan
Theses and Dissertations
Soft matter, a fascinating class of materials, holds a paramount significance in the realm of material design and engineering. Within this broad category, colloidal gels with their unique characteristics have drawn tremendous attention in a variety of applications, spanning from biomedical engineering to oil and gas recovery. Meeting the specific requirements and criteria of these diverse fields necessitates the development of colloidal gels with highly tunable properties to optimize their performance for a wide range of applications. Hence, both scientific and industrial advancement call for more control over the gel properties by exploring novel practical parameters. This dissertation describes an …
Material Development And Optimization Of Solid Oxide Cells For Energy Conversion And Storage, Wanhua Wang
Material Development And Optimization Of Solid Oxide Cells For Energy Conversion And Storage, Wanhua Wang
Theses and Dissertations
There has been an increasing interest in clean and renewable energy generation for highlighted energy and environmental concerns. Solid oxide cell (SOC) has been considered as one of the most promising technologies since it can convert chemical energy to electricity in the fuel cell mode and store electricity to chemicals in the electrolysis mode. The present work is devoted to materials development in both oxygen ion conducting SOC (O-SOC) and proton conducting SOC (P-SOC). The objective of this study is to design and optimize the electrolyte and electrode materials for SOC in energy conversion and energy storage applications. One major …
A Field-Programmable Metamaterial Using Memristor As A Stable Switcher, Taekuk Hong
A Field-Programmable Metamaterial Using Memristor As A Stable Switcher, Taekuk Hong
Theses and Dissertations
Before the memristor was discovered, there were RLC circuits as representative passive devices. However, the fourth fundamental two-terminal circuit has been discovered by Dr. Leon Chua in 1971 and has been called a memristor. The memristor is a compound word of memory and resistor, and is an element whose resistive value is not constant and whose resistive value changes depending on the applied voltage and is recorded as a memory. It is mainly used in resistive switching and is the center of this research theme. A metamaterial is artificially created material that has never been found in nature. The theory …
Impact Of Steroid Receptor And Hormone Manipulation In Skeletal Muscle: Implications For Glucose Metabolism And Insulin Sensitivity In Male Mice, Christian Aaron Unger
Impact Of Steroid Receptor And Hormone Manipulation In Skeletal Muscle: Implications For Glucose Metabolism And Insulin Sensitivity In Male Mice, Christian Aaron Unger
Theses and Dissertations
This dissertation aimed to investigate the influence of modifying steroid receptor content and steroid production within skeletal muscle on glucose metabolism and insulin sensitivity within the context of diet-induced obesity. Specifically, our research focused on three key aspects:1) determining the role that skeletal muscle androgen receptor has on glucose metabolism and insulin action in male mice fed a high-fat diet and 2) determining if inducible skeletal muscle aromatase overexpression improves glucose intolerance and insulin action in male mice fed a high-fat diet and 3) determining if inducible skeletal muscle estrogen-receptor alpha (ER-α) overexpression improves glucose intolerance and insulin action in …