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Towards The Next Generation Of Storage Stack For Nand Flash Memory-Based Systems, Ziyang Jiao
Towards The Next Generation Of Storage Stack For Nand Flash Memory-Based Systems, Ziyang Jiao
Dissertations - ALL
The explosive growth of data has led to increased attention on NAND flash-based solid-state drives (SSDs), which offer high performance, low power consumption, and significant capacity per unit volume when compared to traditional hard-disk drives (HDDs). However, as NAND flash memory density continues to scale, modern SSDs suffer from what is known as fail-slow symptoms, and their performance degrades over time as they wear out. In this dissertation, we focus on understanding and addressing the performance, reliability, and sustainability challenges of modern flash-based storage systems by modeling key metrics, analyzing the design tradeoffs between these metrics, and optimizing existing storage …
Development Of New Oxidative Methods And Synthesis Of Small Molecules For Modulation Of Biological Systems, Robert Eric Anderson
Development Of New Oxidative Methods And Synthesis Of Small Molecules For Modulation Of Biological Systems, Robert Eric Anderson
Dissertations - ALL
Oxoammonium salts have commonly been used to oxidize alcohols to aldehydes and ketones. More recently these reagents have been employed in several different oxidative transformations. Utilizing these reagents a new tandem elimination-oxidation process of tertiary alcohols has been developed. The new process yields an allylic ether which can be transformed to the alcohol easily through a reduction with zinc metal, removing the tetramethylpipyridyl protecting group derived form the oxoammonium salt. Mechanistically the reaction likely proceeds through oxoammonium salt mediated elimination followed by allylic oxidation through an ene-type mechanism. Due to the alcohol being protected by the easily removed oxoammonium salt, …
Harnessing Llms To Detect Hate Speech, Weibin Cai
Harnessing Llms To Detect Hate Speech, Weibin Cai
Theses - ALL
Hate is a sentiment, while hate speech refers to the expression of hate in a form that targets and attacks specific groups, such as race, religion, or gender. With the rise of the internet and social media, hate speech has spread rapidly, gaining wide exposure and posing threats to individual well-being, the profits of major tech companies, and social stability. As a result, both industry and academia have turned their attention to the study of hate speech. One of the most active areas is hate speech detection, which involves training models to predict whether a given piece of content is …
Multi-Modal Mri For The Pre-Clinical Evaluation Of Hiv-Linked Changes In The Central Nervous System, Gabriel Gauthier
Multi-Modal Mri For The Pre-Clinical Evaluation Of Hiv-Linked Changes In The Central Nervous System, Gabriel Gauthier
Theses & Dissertations
Though the inception of anti-retroviral therapy (ART) has fundamentally changed the life expectancy of human immunodeficiency virus (HIV) patients, accessibility and outcomes vary enormously along demographic lines. Even for people living with HIV (PLWH) with perfect access and adherence to anti-retroviral drugs (ARVs), modern treatment plans are fundamentally unable to secure complete viral remission for patients. The cause of this perpetual infection is the persistence of viral reservoirs in the central nervous system (CNS), hidden beyond the reach of modern ARVs, leaving patients to deal with lifelong medication side-effects and risks of developing HIV-associated neurodegenerative disorders (HAND). Despite improving outcomes …
Intrinsic And Extrinsic Drivers Of Bioaerosol Decay: Investigating Pathogen Stability Of Bacteriophage Ms2, Sin Nombre Virus, And Sars-Cov-2 In Simulated Environments, Elizabeth A. Klug
Intrinsic And Extrinsic Drivers Of Bioaerosol Decay: Investigating Pathogen Stability Of Bacteriophage Ms2, Sin Nombre Virus, And Sars-Cov-2 In Simulated Environments, Elizabeth A. Klug
Theses & Dissertations
The threat posed by a virus as a bioaerosol depends largely on its stability under various environmental conditions (relative humidity (RH), sunlight, ozone, etc.). This stability is typically studied through aerosol decay—how the virus' viability changes over time when exposed environmental conditions. The Goldberg rotating drum, a widely used tool for studying bioaerosols, has been the basis of such research (Goldberg et al., 1958). However, it has significant limitations, including an inability to measure initial pathogen infectivity loss and the use of small sample volumes. Additionally, it does not answer the question of what intrinsic factors (lipids, proteins, nucleic acids) …
A Modified Sir Model Used To Investigate The Relationship Between Congenital And Adult Syphilis, Kaleesta R. Waysman
A Modified Sir Model Used To Investigate The Relationship Between Congenital And Adult Syphilis, Kaleesta R. Waysman
Honors Thesis
A complex SIR model integrating the relationship between adult and congenital syphilis was developed. The goal of the project was to determine the specific population(s) or control strategies that should be enforced, altered, or removed to decrease the number of children experiencing clinical sequelae due to congenital syphilis. Early clinical sequelae include hydrops fetalis, preterm birth, central nervous system infection, hepatosplenomegaly, hyperbilirubinemia, cholestasis, hemolytic anemia, snuffles, osteochondritis, and lesions or rashes in the palms and soles. Late clinical sequelae include interstitial keratitis, hearing loss, Hutchinson teeth, saber shins, Clutton joints, mulberry molars, and saddle nose. After implementing real-world data into …
Characterization Of Microplastic Pollution In Intentionally Flooded Fields In The Mississippi Delta, Edward G. Heinen
Characterization Of Microplastic Pollution In Intentionally Flooded Fields In The Mississippi Delta, Edward G. Heinen
Honors Theses
Microplastic (MP) pollution in agricultural environments is spread throughout soil and water due to plasticulture, the use of plastic materials for agricultural applications. In the Mississippi Delta, shallow habitat management for migratory birds involves flooding agricultural fields to resting grounds for birds during migration, as well as to improve soil parameters. In this study, MP concentrations, polymer IDs, and polymer sizes in Delta flood and source water samples were quantified using a Bruker Lumos II μ-FTIR instrument. Average concentrations (MPs/L) in floodwater (n=18) were 72 ± 66, while average concentrations in source water (n=4) and runoff (n=3) were 169 ± …
Effects Of Structure Of Mepegn Polymers On Hydroxide Conductivity In Anhydrous Anionic Exchange Membranes, Athan M. Gregory
Effects Of Structure Of Mepegn Polymers On Hydroxide Conductivity In Anhydrous Anionic Exchange Membranes, Athan M. Gregory
Honors Theses
Anhydrous hydroxide ion (OH-) conducting polymer electrolytes composed of a 1-methyl-pyrrolidinium (1mp) head group linked to various MePEGn (n = 3, 7, 12) backbones were prepared. We have examined the structure of these anion exchange membranes to observe how the structure of the electrolyte affects the observed ionic conductivity. The structural parameters investigated were polymer length, viscosity, fractional free volume (FFV), and volume fraction of PEG (Vf,PEG), and each polymer varied in these properties. Through a comparison of the conductivity and structural parameters in the MePEGn-based anion electrolytes, we have shown that each of these structural properties weakly affects the …
Phishy Pages - The Design Of A User-Interactive Website For Phishing Attack Evaluation, Evan C. Gregory
Phishy Pages - The Design Of A User-Interactive Website For Phishing Attack Evaluation, Evan C. Gregory
Honors Theses
Phishing attacks are a widespread, malicious phenomenon. These attacks steal people’s personal information, causing them ruin and lining the pockets of criminals. What makes them so dangerous is that they come in a variety of forms, including emails, websites, phone calls, and social media can be vectors for attackers. Fortunately, these attacks can be stopped by informing potential victims of common signs to look out for. Training is one of the best methods people use to teach web-users how to protect themselves. To train them, however, users must be taken through many examples of phishing attacks to learn the characteristics …
Architecture Of Pseudomonas Aeruginosa Glutamyl-Trna Synthetase Defines A Subfamily Of Dimeric Class Ib Aminoacyl-Trna Synthetases, Michael K. Fenwick, Stephen J. Mayclin, Steve Seibold, Amy E. Derocher, Sandhya Subramanian, Isabelle Q. Phan, David M. Dranow, Donald D. Lorimer, Ariel B. Abramov, James M. Bullard
Architecture Of Pseudomonas Aeruginosa Glutamyl-Trna Synthetase Defines A Subfamily Of Dimeric Class Ib Aminoacyl-Trna Synthetases, Michael K. Fenwick, Stephen J. Mayclin, Steve Seibold, Amy E. Derocher, Sandhya Subramanian, Isabelle Q. Phan, David M. Dranow, Donald D. Lorimer, Ariel B. Abramov, James M. Bullard
School of Integrative Biological & Chemical Sciences (Formerly Dept. of Chemistry)
The aminoacyl-tRNA synthetases (AaRSs) are an ancient family of structurally diverse enzymes that are divided into two major classes. The functionalities of most AaRSs are inextricably linked to their oligomeric states. While GluRSs were previously classified as monomers, the current investigation reveals that the form expressed in Pseudomonas aeruginosa is a rotationally pseudosymmetrical homodimer featuring intersubunit tRNA binding sites. Both subunits display a highly bent, “pipe strap” conformation, with the anticodon binding domain directed toward the active site. The tRNA binding sites are similar in shape to those of the monomeric GluRSs, but are formed through an approximately 180-degree rotation …
High-Quality Factor Phase Gradient Metasurfaces With Dynamic Reconfigurability, Lin Lin
High-Quality Factor Phase Gradient Metasurfaces With Dynamic Reconfigurability, Lin Lin
Arts & Sciences Graduate Student Theses and Dissertations
Free-space optical communication holds immense potential for surpassing the bandwidth limitations of conventional physically defined channels. Achieving flexible and efficient communication in free space requires compact, robust optical components capable of dynamically tuning laser light without relying on bulky lenses or mechanically driven mirrors. Metasurfaces, or flat optics, have garnered significant attention due to their densely arranged subwavelength nano-resonators, which impart phase, amplitude, and polarization changes comparable to those of traditional bulky optics. However, conventional phase gradient metasurfaces are constrained by passive designs based on geometric configurations and the weak light-matter interaction inherent in most dielectric materials, limiting their applicability …
Automation Of Javanese Shadow Puppets Using Machine Control, Kristian Rice, Yinson Tso, Mukhammadali Yuldoshev
Automation Of Javanese Shadow Puppets Using Machine Control, Kristian Rice, Yinson Tso, Mukhammadali Yuldoshev
Publications and Research
The virtualization of Javanese shadow puppetry (Wayang Kulit) offers a unique opportunity to preserve and revitalize traditional performance art through immersive digital platforms. This project explores the development of a virtual Wayang Kulit experience using real-time 3D engines like Unity/Unreal Engine while focusing on simulating the mechanics and aesthetics of shadow puppet performance. The puppets are designed using detailed 2D planes and rigged with skeletal systems to reflect the stylized motion of traditional puppetry. An aspect of this project is integrating an AI-driven control system that autonomously animates the puppets, learning from recorded puppeteer performances to replicate gesture, rhythm, and …
Experimental Evaluation Of Resource Allocation To Organelles In Eukaryotic Cells, Ronan Hanley
Experimental Evaluation Of Resource Allocation To Organelles In Eukaryotic Cells, Ronan Hanley
Senior Honors Papers / Undergraduate Theses
Among the hallmarks of the eukaryotic cell is its organization into spatially defined sub-compartments known as organelles. Organelles provide optimized environments for otherwise incompatible biochemical reactions within the cell. It has been shown that there is significant variation in the properties of organelles in a cell, and that cells have access to a limited pool of resources that they can allocate to organelles. This begs the question: by what principles do cells dictate how resources are allocated? To begin to explore this question, we look at resource allocation in S. cerevisiaefrom two perspectives. First, we use a combination of …
Transmutation, Sam Berger
Transmutation, Sam Berger
MFA in Visual Art
My artistic practice is about change itself. I am inspired by the doubling and layering effects that came out of Surrealist Photography. Scale, fracture, and doubling are intentional components of my process. I combine those methods to create complex works of art, focusing on the untamable light that I hope to capture when making my images, which often are self portraits. Poetry is an integral element of this thesis text as well as my art making process. Through my poetic work I hope to offer my audience a glimpse into how I see and experience the world. This thesis text …
Exploring Human-Centered Principles To Improve Lecture Slides, Joshua Harlev, Louanne Boyd
Exploring Human-Centered Principles To Improve Lecture Slides, Joshua Harlev, Louanne Boyd
Student Scholar Symposium Abstracts and Posters
As a university emphasizing student participation and attention, lectures are central to the educational experience at Chapman. However, slide-based lectures can widely vary in quality and approach. Considering various debunkings of learning styles over the years, it seems more difficult than ever to understand how to most effectively teach students. Effective use of computerized tools has thus become increasingly important as the pace of change continues to increase. Yet, research is available on the effectiveness of teaching methods that can provide guidelines for instructors. With increasingly connected and capable devices at our fingertips, it is imperative to both use the …
Praxly: An Online Ide For The Praxis Cs Test Pseudocode, Benjamin Saupp
Praxly: An Online Ide For The Praxis Cs Test Pseudocode, Benjamin Saupp
James Madison Undergraduate Research Journal (JMURJ)
No abstract provided.
Amplifying Climate Action: San Diego’S Climate Action Plan (Cap) Dashboard, San Diego Regional Climate Collaborative, Courtney Chinn, Marius Van Dongen
Amplifying Climate Action: San Diego’S Climate Action Plan (Cap) Dashboard, San Diego Regional Climate Collaborative, Courtney Chinn, Marius Van Dongen
San Diego Regional Climate Collaborative
The City of San Diego boasts a strong tourism and recreation industry, partly attributed to the City’s temperate climate. In recent years, extreme weather events tied to climate change have led to an even stronger focus on mitigation and resilience. In 2015, the City adopted a Climate Action Plan (CAP), which was most recently updated in 2022. The CAP established the goal for the community to reach net zero emissions by 2035. In the fall of 2024, to boost the efforts of the CAP, the City of San Diego published their online Climate Action Plan platform, the CAP Dashboard. The …
Re: Comment Letter For The Butte Priority Soils Operable Unit (Bpsou) Draft Final Residential Metals Abatement Program (Rmap) Quality Assurance Project Plan (Qapp) (Non-Residential Parcels And Residential Daycares) (Dated February 26, 2025), Molly Roby
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Vanadyl Phthalocyanine As A Low-Temperature/Low-Pressure Catalyst For The Conversion Of Fructose To Methyl Levulinate, Juan Luna, Mataz Alcoutlabi, Elizabeth M. Fletes, Helia Magali Morales, Jason Parsons
Vanadyl Phthalocyanine As A Low-Temperature/Low-Pressure Catalyst For The Conversion Of Fructose To Methyl Levulinate, Juan Luna, Mataz Alcoutlabi, Elizabeth M. Fletes, Helia Magali Morales, Jason Parsons
School of Integrative Biological & Chemical Sciences Faculty Publications
In this study, a vanadyl phthalocyanine was synthesized and characterized using XRD, FTIR, and XPS, confirming the successful metalation of the phthalocyanine ring. XRD analysis showed the vanadyl phthalocyanine crystallized in the P-1 crystal lattice, with unit cell parameters a = 12.058 Å, b = 12.598 Å, and c = 8.719 Å, and the lattice angels were 96.203°, 94.941°, and 68.204°. FTIR spectroscopy supported the metalation by the disappearance of the N-H stretch of the non-metalated phthalocyanine. The vanadyl phthalocyanine was tested as a heterogenous catalyst for the conversion of fructose into methyl levulinate in H2SO4–methanol and HCl–methanol systems. The …
Estimating Pedestrian Crossing Times At Scramble Crossings Via Machine Learning And Agent-Based Modeling, Sho Takami
Estimating Pedestrian Crossing Times At Scramble Crossings Via Machine Learning And Agent-Based Modeling, Sho Takami
Honors Capstones
Scramble crosswalks differ from conventional crosswalks in their ability for pedestrians to cross diagonally. This research compares the average crossing times and investigates the walking behaviors that pedestrians adopt to produce the speediest times in the two crosswalk configurations. Identification of the most efficient set of walking behaviors is done through an agent-based model, whereas producing polynomials relating crossing times to the most prominent walking behaviors is done through regression algorithms in machine learning. With the combination of these two approaches, it is revealed that pedestrians must adopt a relaxed walking style to make each crosswalk configuration efficient. Additionally, between …
Recent U.S. Government Policy Literature On Critical And Strategic Minerals, Bert Chapman
Recent U.S. Government Policy Literature On Critical And Strategic Minerals, Bert Chapman
Libraries Faculty and Staff Scholarship and Research
Critical and strategic minerals have become increasingly important in U.S. government civilian and military policymaking in recent years. This is demonstrated by the heavy use of such minerals in many critical civilian and military infrastructures. This work will discuss how this subject has been addressed in laws, presidential documents, and works by government agencies along with congressional oversight committees and support agencies. It will stress how the United States is heavily dependent on strategic minerals from adversarial foreign countries such as China and will examine U.S. efforts to increase its ability to produce such materials in the United States by …
Modeling Literary Connections: Exploring Transregional Resistance In Dalit Poetry, Antara Bhattacharyay
Modeling Literary Connections: Exploring Transregional Resistance In Dalit Poetry, Antara Bhattacharyay
Mathematics, Statistics, and Computer Science Honors Projects
Structuring socio-political identities, the caste system (a graded form of hierarchy) remains entrenched in contemporary Indian society. Dalits, marginalized by the caste system, have expressed their resistance through literature, envisioning substantive equality and social change. In this thesis, I draw on digital humanities methods to examine regional variation in translated Dalit poetry from Bengali, Hindi/Urdu, Marathi, and Tamil languages. I utilize topic modeling—a machine learning algorithm that detects latent semantic structures in a text—as a point of departure for poetry analysis. I observe how topic modeling enables newer readings of the poems, revealing regionally resonant and broader Dalit themes.
How Much Should Consumers With Mild To Moderate Hearing Loss Spend On Hearing Devices?, Vinaya Manchaiah, Steve Taddei, Abram Bailey, De Wet Swanepoel, Hansapani Rodrigo, Andrew Sabin
How Much Should Consumers With Mild To Moderate Hearing Loss Spend On Hearing Devices?, Vinaya Manchaiah, Steve Taddei, Abram Bailey, De Wet Swanepoel, Hansapani Rodrigo, Andrew Sabin
School of Mathematical & Statistical Sciences Faculty Publications
Background: This study examined the relationship between hearing device price and sound quality. Method: A novel consumer-centric metric of sound quality (“SoundScore”) was used to assess hearing devices’ audio performance. Each hearing device is tested with two fittings. The “Initial Fit” is designed to approximate the most likely fitting for an individual with a mild-to-moderate sloping sensorineural hearing loss. The “Tuned Fit” includes adjusting parameters optimized to hit prescriptive fitting targets (NAL NL2) on an acoustic manikin. Each fitting is evaluated across five dimensions. Both fittings are combined using a weighted average to create a single number from 0 to …
Mitigating Supply Chain Disruptions In The Retail Warehousing Industry, Terricka Nichole Townsend
Mitigating Supply Chain Disruptions In The Retail Warehousing Industry, Terricka Nichole Townsend
Walden Dissertations and Doctoral Studies
Retail warehousing stability is increasingly threatened by global uncertainties and supply chain disruptions, requiring urgent and innovative strategies. This issue is critical for retail warehousing managers and supply chain leaders, as their ability to respond impacts organizational resilience, business continuity, and customer satisfaction. The purpose of this qualitative pragmatic inquiry was to explore strategies used by retail warehousing managers to mitigate the negative impacts of supply chain disruptions on business stability. The situational crisis communication theory and attribution theory provided the conceptual framework for understanding how retail warehousing managers communicate and respond to supply chain disruptions while maintaining stakeholder trust …
Voice Interaction With Conversational Ai Could Facilitate Thoughtful Reflection And Substantive Revision In Writing, Jiho Kim, Philippe Laban, Xiang 'Anthony' Chen, Kenneth C. Arnold
Voice Interaction With Conversational Ai Could Facilitate Thoughtful Reflection And Substantive Revision In Writing, Jiho Kim, Philippe Laban, Xiang 'Anthony' Chen, Kenneth C. Arnold
University Faculty Publications and Creative Works
Writing well requires not only expressing ideas but also refining them through revision, a process facilitated by reflection. Prior research suggests that feedback delivered through dialogues, such as those in writing center tutoring sessions, can help writers reflect more thoughtfully on their work compared to static feedback. Recent advancements in multi-modal large language models (LLMs) now offer new possibilities for supporting interactive and expressive voice-based reflection in writing. In particular, we propose that LLM-generated static feedback can be repurposed as conversation starters, allowing writers to seek clarification, request examples, and ask follow-up questions, thereby fostering deeper reflection on their writing. …
Volume 11 Full Text, Bjur Staff
Volume 11 Full Text, Bjur Staff
Butler Journal of Undergraduate Research
No abstract provided.
Intuiting Interaction: Meta-Reasoning And Meta-Learning As Foundations For Intelligent User Interfaces, Jeffrey Hsu
Intuiting Interaction: Meta-Reasoning And Meta-Learning As Foundations For Intelligent User Interfaces, Jeffrey Hsu
Theses and Dissertations
This research presents MARCO—a cognitive framework for Intelligent User Interfaces that uses meta-reasoning for context-aware adaptation across diverse tasks. It integrates multiple reasoning modules coordinated by a Meta-Cognitive Unit that selects strategies based on evolving demands. Evaluations show MARCO outperforms baselines in reasoning accuracy and computational efficiency.
Community Stakeholders’ Perceptions On Growing A Nonprofit Donor Base Through In-Kind Donations, Brittany A. Heine
Community Stakeholders’ Perceptions On Growing A Nonprofit Donor Base Through In-Kind Donations, Brittany A. Heine
Walden Dissertations and Doctoral Studies
In Northern Virginia alone, over 90,000 people are food insecure. The USDA has reported strong correlations between food insecurity and negative health outcomes. The purpose of this qualitative case study was to determine community stakeholders’ perceptions on engaging in strategic partnerships with Organization X using in-kind donations as a strategy to decrease the organization’s expenditures and grow its donor base. 14 community stakeholders were chosen through purposive sampling and participated in semi structured interviews. Using the conceptual framework of the unified theory of revenue generation for nonprofits, interview questions were developed to determine the variables that impact a stakeholder’s decision …
Table Of Contents And Front Matter, Bjur Staff
Table Of Contents And Front Matter, Bjur Staff
Butler Journal of Undergraduate Research
No abstract provided.
Under Pressure: A Quantitative Approach To Measuring Clutch Performance In The Nba, Jack Dell'isola
Under Pressure: A Quantitative Approach To Measuring Clutch Performance In The Nba, Jack Dell'isola
Honors Projects in Information Systems and Analytics
This research investigates the existence and relevance of clutch performance in the 2023-2024 NBA regular season. Players are analyzed both individually and against league averages to determine their clutch performance levels using an original "clutch score formula". This research aims to answer the questions of whether clutch performance is a real phenomenon, how individual player performance is affected in clutch time, and to determine a formula that can effectively predict the winner of the Clutch Player of the Year Award. The findings and formulas developed in this research help to shed light on the complexities of clutch performance, which has …