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Aqueous Iron Electrowinning: From Electrolyte Engineering To The Unexplored Potential Of Acetate Systems, Chodwell N. Verenga

Dissertations, Master's Theses and Master's Reports

Iron electrowinning and electrodeposition sit at the intersection of classical metallurgy and developing sustainable manufacturing. With the iron and steel industry responsible for 7 - 9% of global CO₂ emissions, low-temperature electrochemical pathways for iron production have garnered significant research interest. This review examines the fundamental electrochemical principles governing iron deposition, the thermodynamic constraints imposed by the iron-water system, and the kinetic challenges posed by the parasitic hydrogen evolution reaction (HER). The three key electrolyte systems are objectively evaluated: acidic sulfate and chloride electrolytes, alkaline suspension electrolytes and water-in-salt electrolytes. Their operating parameters, faradaic efficiencies, energy consumption and deposit characteristics …

Theoretical Study Of Long-Range Molecular Interactions, Adrian Luis Batista-Planas

Doctoral Dissertations

Describing intermolecular forces is fundamental to modeling and predicting the behavior of molecular systems. In particular, long-range molecular interactions—with electrostatic, induction, and dispersion as main components—play a critical role, especially for low-temperature and low-density regimes. Long-range interactions are often described through perturbation theory, representing the electronic charge distribution via multipolar series of the moments and polarizability tensors corresponding to each molecule. However, while the theory is well-established, obtaining the resulting analytical expressions (and their practical implementation) constitutes a highly complex and system-dependent task. To address this challenge, we developed Long-Range-Fit (LRF), an interactive and user-friendly software package designed to automate …

Adaptive Machine Learning Framework For Microstructural Optimization And Mechanical Performance Prediction In Steels, Henry Adekola Haffner

Doctoral Dissertations

Evolution of microstructures, such as polygonal ferrite, acicular ferrite, bainite, and martensite, plays a pivotal role in determining the final microstructural and mechanical properties of steel products. Given the established inter-relationship between processing parameters, microstructure, properties, and performance, precise control of phase transformation is essential to achieve pre-determined properties. To understand transformation routes in different steel grades, time-temperature-transformation (TTT) and continuous-cooling-transformation (CCT) diagrams are necessary and can be described using the Johnson-Mehl-Avrami-Kolmogorov equation and Scheil’s additivity rule. This study presents a comprehensive computational framework for predicting and optimizing microstructure and mechanical properties in advanced high-strength steels (AHSS) using adaptive machine …

Security And Energy-Efficiency In Federated Learning, Priyesh Ranjan

Doctoral Dissertations

Federated Learning (FL), which facilitates collaborative model training and protects users' privacy, has drawn great interest from the research community. With FL, the participants train their models on local data and submit the corresponding updates for aggregation to a server. While concealing the participants' identities, FL may attract adversaries aiming to hamper the underlying model. These adversaries aim to submit malicious weight updates that corrupt the performance of the server model. Further, these models when communicated to the participating clients extend the behavior which is undesirable. Additionally, FL suffers from increased energy consumption at the edge device level due to …

Advancing Coal Rib Support Design Through The Integration Of Field Studies And Numerical Simulations, Alper Kirmaci

Doctoral Dissertations

Coal rib stability remains a major safety concern in U.S. underground coal mines, with rib failure-related injuries and fatalities still occurring. A key challenge is the lack of a standardized methodology for designing rib support systems that can address varying geological conditions. As a result, many mines rely on trial-and-error or traditional practices, leading to inconsistent designs. This research aims to develop a systematic methodology for rib support design to improve coal rib stability in U.S. mining operations.

The study consists of: i) field monitoring in active room-and-pillar coal mines, ii) in-situ pull-out tests on coal ribs, iii) numerical model …

Critical Parameters Controlling Oxide Scale Formation And Hydro-Descaling Efficiency During Steelmaking, Tochukwu Princewill Ojiako

Doctoral Dissertations

In modern steelmaking, cast slabs are exposed to high-temperature oxidizing environments during secondary cooling, reheating, and hot rolling, resulting in the formation of multilayer oxide scales on the steel surface. These scales interact with mold-flux residues originating from the casting process (CC). The morphology, chemistry, and adhesion of oxide scale strongly influence its removability during high-pressure hydraulic descaling and ultimately determine the surface quality of hot-rolled products. However, the mechanistic relationship between oxide scale evolution, scale-steel interfacial structure, and hydraulic descaling performance remains poorly understood.

This dissertation investigates oxide scale formation, modification, and removal in low-carbon thin-slab steels produced by …

Incremental Cluster Validity Indices And Their Role In Interpreting Lifelong Learning Systems, Niklas Max Melton

Doctoral Dissertations

Clustering and supervised learning are often treated as distinct paradigms, yet both rely on structure in feature space. This dissertation investigates the relationship between cluster validity indices (CVIs) and supervised learning in real-time and lifelong learning settings where data arrive incrementally and cannot be revisited. Across four studies, it develops methods for online cluster validation, uses supervised learning to improve their interpretability, and applies these ideas to evaluating performance degradation in continual learning.

The first study extends incremental cluster validity indices (iCVIs), enabling widely used validation metrics to operate in streaming environments. Experiments on synthetic and real-world datasets show systematic …

Milankovitch Paleoclimatic Signals In Upper Permian–Lower Triassic Fluvial-Lacustrine Records, Bogda Mountains, Greater Turpan-Junggar Intracontinental Rift Basin, Nw China, Wentao Zhang

Doctoral Dissertations

"The objective of this study is to understand whether Milankovitch climatic and/or tectonic processes influenced the sedimentation of the upper Permian–Lower Triassic fluvial-lacustrine cyclic deposits in Bogda Mountains, greater Turpan-Junggar intracontinental rift basin, Xinjiang Uygur Autonomous Region, NW China. This study carried out gamma analysis, gamma and astronomical tuning, and spectral analysis on the Wutonggou, Jiucaiyuan, and Shaofanggou low-order cycles of the South and Central Taodonggou, South and North Tarlong, Dalongkou, and Zhaobishan sections. Stable and positive gamma values support the assumption of facies-dependent sedimentation rates for non-marine facies. The sedimentation rates range from 0.04 to 2.43 m/kyr, and 0.21 …

Bond Graph And Extended Generalized Average Method With Applications In Cyber-Physical Systems And Power Electronics, Arnold Anthony Fernandes

Doctoral Dissertations

"This research examines two applications of control theory. The first application considers the bond graph (BG) modeling technique, which is used to develop the MATLAB structural analysis toolbox (MATSAT), an open-source toolbox for sensor placement and qualitative system analysis that considers the observability and fault-detection capabilities of multi-domain cyberphysical systems. The toolbox provides information on redundant sensors, guiding the system designer in cost and security trade-offs. The toolbox uses traditional BG causality assignment procedures. Additionally, MATSAT provides optimal causality assignment methods that perform significantly better at assigning causality to BGs with increased junctions, sources, and simple meshes, without encountering causality …

An Energy-Stable Mixed Cg-Dg Scheme For A Full Shliomis Phase Field Model Of Two-Phase Ferrofluid Flows, Mahdi Gharehbaygloo

Doctoral Dissertations

"Ferrofluids are magnetic nanoparticle suspensions whose motion couples surface tension, flow field, magnetostatics, and magnetization dynamics. This dissertation develops, analyzes, and validates an energy-stable finite element method for a two-phase ferrofluid model that couples the Cahn-Hilliard equations with the full Shliomis model of single-phase ferrofluids, retaining its damping torque term, magnetic torque term, and magnetic stress term.

The spatial discretization is a mixed continuous Galerkin (CG) and discontinuous Galerkin (DG) formulation. It uses continuous ��2 elements for the phase field, chemical potential, velocity, and magnetostatic potential, discontinuous ��2 elements for the magnetization, and discontinuous ��1 elements for the pressure. The …

Strict Scrutiny And The Viewpoint Continuum, A.G. Harmon

Scholarly Articles

Consider the following instances: A cell phone photograph picturing a man's left kneecap. A statement that the speaker thinks, "The name Josiah is really cool." A woman who runs her bicycle over a business owner in order to gain celebrity and increase attention for her new podcast. An intentional lie told to acquire a job. A student who insists on answering his math exam questions in runic symbols.

At one point or another, American courts have considered the merits found in favor of instances similar to these and other like circumstances as amounting to "viewpoints." As such, they …

The Constitution Of Conversations: The Enduring Legacy Of Sandra Day O'Connor, Derek A. Webb

Scholarly Articles

Soon after Justice O'Connor's passing in December 2023, commentators and court watchers across the ideological spectrum questioned whether anything in the legacy of the first woman to serve on the Supreme Court— once called “the most powerful woman in Washington, D.C.”—remained intact.

Drawing upon speeches and interviews she gave over her entire forty-year public career, I argue that O’Connor’s deepest and most enduring contribution was a subtle, compelling, interconnected, and yet today largely countercultural vision of the Constitution as a site of multiple conversations, a “Constitution of Conversations,” that took place variously within institutions, across institutions, and across time. More …

Embodying Policy Work: An Exploration Of Contexts, Actions And Meanings Towards New Possibilities For Physical Education Teacher Education (Pete), Victoria Evans, David Aldous, Dawn Penney

Research outputs 2022 to 2026

This theoretical paper presents a heuristic framework that is directed towards transformative thinking and practices in Physical Education Teacher Education (PETE). The research focus and direction, embodying policy work, applies and extends Bernstein’s concepts of the pedagogic and corporeal device to offer new directions for inquiry and explore the considerations these raise for PETE professionals and their practices. The paper affirms the importance of policy work in PETE, while recognising a need for more nuanced and critical understandings of the complex interrelationships between contexts and actions, and the potential meanings generated and ascribed to different forms of policy work and …

Nation, Nature And Childhood In Five Curricula: Towards Earthly Education, Zsuzsa Millei, Katarzyna Gawlicz, Lucy Hopkins, Camilla Eline Andersen, Danielle Ekman Ladru

Research outputs 2022 to 2026

This article explores the relations between nation, nature and childhood in five early childhood education curricula in the Nordic, post-socialist and settler-colonial states with the focus on the role education plays in the face of the climate crisis. The authors identify three interconnecting themes in which nation, nature and childhood are entangled in these curricula: 1) national nature as an object of learning; 2) nature and home/birth land and Country; and 3) stewardship for national nature. Exploring these themes from the perspective of alternative pedagogies developed to address the child–nature relations during the Anthropocene, the authors argue that these notions …

Near Infrared Fluorophore Specific For Annexin A2 Identifies Peripheral Nerve Injury In A Rodent Transection Model, Marie C Spezia, Christopher J Dy, Brooke Farrell, Ayan Iftikhar, Stephen Demartini, Ron Perez, Samuel Achilefu, David M Brogan

2020-Current year OA Pubs

INTRODUCTION: Peripheral nerve injuries (PNI) pose a major challenge in the intraoperative assessment of nerve viability. Wallerian degeneration (WD) is the degenerative process of axonal breakdown distal to the site of injury, with limited proximal extension, and progresses through spatiotemporally consistent stages facilitated by Schwann cell reprogramming and macrophage infiltration. We evaluated LS-301, a near-infrared (NIR) fluorophore previously used in human oncology trials, that targets phosphorylated annexin A2 (pANXA2), which is upregulated and redistributed to Schwann cell surfaces after nerve injury.

METHODS: Utilizing a sciatic nerve transection model in rats, LS-301 was compared with the untargeted control dye Cypate-3 using …

Immunoembolization In Liver-Predominant Metastatic Uveal Melanoma: A Single-Center Retrospective Analysis, Renee Morecroft, Jordan Phillipps, Amrat Kumar, Jacob Strelnikov, George Nassief, Naganathan Mani, Jennifer Gould, Tanner Johanns, George Ansstas

2020-Current year OA Pubs

INTRODUCTION: Approximately 50% of patients with uveal melanoma develop metastatic disease, most commonly involving the liver, and prognosis remains poor. Immunoembolization (IE) is an established liver-directed therapy for patients with liver-dominant metastatic uveal melanoma (mUM), though comparative data with other regional therapies remain limited. We present a single-center retrospective analysis of IE in hepatic mUM and compare outcomes with those reported in the Phase 3 FOCUS trial evaluating melphalan via percutaneous hepatic perfusion.

METHODS: All patients with liver-dominant mUM treated with IE between 2010 and 2023 at our institution were included. Clinical records were reviewed for demographics, tumor characteristics, treatment …

A Wound Upon The Union: John Quincy Adams And The Treaty Of Indian Springs, Spencer Peacock

Honors Theses and Capstones

This thesis examines the crisis that developed after US president John Quincy Adams signed, then disavowed (allegedly over moral concerns), the fraudulent 1825 Treaty of Indian Springs with the Creek Indian Nation. The thesis probes Adams' motives during the Treaty of Indian Springs crisis, and seeks to connect the crisis to the evolution of US federal Indian policy in the 1820s, prior to the mass Indian removal of the 1830s.

When Does Sexual Image Exposure Constitute Child Sexual Abuse?: Definitional Inconsistencies, Paige B. Kenny

Honors Theses and Capstones

The following review examines how youth exposure to sexual images online is conceptualized and measured as abusive within epidemiological research on online child sexual abuse (OCSA). As digital environments reshape sexual socialization, scholars debate whether and when exposure to sexual content constitutes abuse. To address this issue, this study conducts a qualitative content analysis of 27 survey items drawn from 20 empirical studies of youth online experiences. Survey questions about sexual image exposure were coded across four dimensions: volition, personalization, image or text, and explicitness. Findings reveal significant definitional inconsistency. Many studies rely on ambiguous terms such as “sexual” or …

Surveillance Of A Novel Vesivirus Discovered In An Urban Mephitis Mephitis Population, Amanda E. Diggins

Honors Theses and Capstones

Caliciviridae is a family of non-enveloped, positive-sense, single stranded RNA viruses, including eleven defined genera that contain important pathogens of humans and animals. Within the Caliciviridae family, the genus Vesiviridae includes feline calicivirus, a leading cause of upper respiratory disease in cats, and vesicular exanthema of swine virus, a historical disease of domestic swine that has now been implicated in several marine mammal vesicular diseases, one of which has been confirmed zoonotic. Urban landscapes create a unique environment for rapid intra- and interspecies transmission of viruses. Clustered resources attract high-density populations of synanthropic wildlife species, increasing spatial overlap and heightening …

Guidelines For Enhancing Voter Accessibility, Anna Barrows

Honors Theses and Capstones

No abstract provided.

After The Impact: Balance Function In Women With Repeated Concussions, Caroline M. Stack

Honors Theses and Capstones

Balance deficits following repeated mild traumatic brain injuries are well documented, yet research examining the delayed outcomes specifically in college-aged women remains limited. The present study investigated whether women with a history of two or more mTBIs exhibit lasting balance impairments compared to women with zero or one prior mTBI, tested at least six months after their most recent injury. Thirty-four English-speaking women (ages 18-30) recruited from the University of New Hampshire were assigned to a repetitive mTBI group or a control group. Balance was assessed using the Balance Error Scoring System and a MetaMotion inertial measurement sensor positioned on …

Hey, Siri: How Companionate Ai Usage Affects Social Satisfaction And Personal Intelligence, Ryan E. Moran, Marley Ireland

Honors Theses and Capstones

Artificial intelligence is a field that is growing and changing faster than humanity can keep up. While part of the population is benefiting from its unmatched diagnostic power, increased productivity in school and in work, and even its surgical and therapeutic contributions, others are filing lawsuits based on claims that an AI chatbot was a key factor in the mental health crisis of someone they loved. Research has found that reliance on these AI-generated conversational agents can lead to social withdrawal, unrealistic relationship expectations, addictive tendencies, and, in the worst cases, increased or encouraged suicidal ideations, especially in vulnerable populations. …

How Historical Experiences Shaped The Italian Constitution: A Comparative Perspective With The United States, Kaitlin M. Rocca

Honors Theses and Capstones

No abstract provided.

Concord Public Transportation Improvement Project, Jacob Holt

Honors Theses and Capstones

The capital city of Concord, New Hampshire, has been served by Concord Area Transit (CAT) since 1989. Despite continued population growth and economic development within the city, CAT’s fixed route bus system has remained unaltered since 2011. The purpose of this project is to rework the CAT system to provide service that better aligns with Concord resident’s current needs. A public survey was conducted to gather data regarding Concord resident’s needs, habits, and perception of the existing system, which was used in the development of the revised system. The project includes suggestions for both system-wide and route-specific modifications. Key changes …

Comparing The Differences Of Hsp90Α And Hsp90Β In Native Protein Complex Incorporation, Daryna Serediuk

Honors Theses and Capstones

Epichaperomes are long-lasting, stable assemblies of chaperones, co-chaperones, and associated factors that facilitate cell survival in maladaptive cellular states. Their inhibition has emerged as an attractive therapeutic strategy for the treatment of cancer and neurodegenerative diseases (Rodina et al., 2016). Epichaperomes are hallmarks of robust proliferation in cancer cell populations across many cancer types and are abundantly present in several stem cell varieties, including induced pluripotent stem cells, human embryonic kidney cells, and cancer stem cells (Kishinevsky et al., 2018).

The core protein of the eukaryotic heat shock protein machinery, Heat Shock Protein 90 (Hsp90), is a central chaperone that …

Fgf Signaling Is Necessary For Newt Lens Regeneration, Leo Alexander Napoleon

Honors Theses and Capstones

The Iberian ribbed newt Pleurodeles waltl can regenerate the lens by transdifferentiating iris pigmented epithelial (IPE) cells into lens epithelial cells (LECs), but the mechanism by which this occurs remains largely uncharacterized. We aim to mechanistically show an early and critical role for FGF signaling by using small molecules to inhibit FGF receptors and observe the histological and intracellular effects. Two inhibitors were found to completely stall lens regeneration. Cell cycle analysis revealed decreased DNA synthesis and uniformly low but unchanged entry to mitosis under signaling inhibition by staining for EdU incorporation and phospho-histone H3 (pH3), respectively. Western blot revealed …

Detection And Management Of Attacks On Synchronized Networks, Michael T. Spearman

Honors Theses and Capstones

The Precision Time Protocol (IEEE 1588) provides sub-microsecond clock synchronization across packet-switched networks and has become foundational infrastructure in 5G fronthaul, industrial control systems, and financial exchanges. Despite its criticality, most deployed PTP networks operate without active security monitoring, and no standardized detection mechanism exists for the class of attacks that deliberately stay below conventional jitter thresholds. This thesis investigates whether hardware-level ptp4l offset logs alone are sufficient to reliably detect two such attacks, slowly wandering packet delay injection and rogue master spoofing, and whether detection can occur before severe synchronization failure.

A hardware-in-the-loop testbed was constructed using two hosts …

Stress And Reward Interactions In Substance Use Disorder: An Evolutionary Mismatch Framework, Nicholas L. Castrucci

Honors Theses and Capstones

Substance use disorder (SUD) is a major public health concern characterized by compulsive substance use despite adverse consequences. While contemporary models emphasize biological, psychological, and environmental contributors, stress- and reward-related systems are often examined in isolation. This review integrates these systems within an evolutionary mismatch framework to examine how chronic stress exposure and repeated substance use increase vulnerability to addiction. Stress and reward systems are evolutionarily conserved but may become chronically dysregulated under modern conditions characterized by persistent psychosocial stressors and highly potent rewarding stimuli. This is associated with converging neuroadaptations across stress and reward circuitry, resulting in altered affective …

Reading Between The Lines: Representations Of Dyslexia In Young Adult Literature, Carli B. Gauvin

Honors Theses and Capstones

While dyslexia affects upwards of 20% of the population, this learning disability is not commonly brought up in young adult literature. This lack of representation negatively impacts those with dyslexia, who often fail to find themselves in the books they read, and readers in general, who are given fewer opportunities to gain insight into the learning disability. Young adult books that do discuss dyslexia can be at risk of portraying the learning disability in an unfavorable light, which can make dyslexic readers feel undervalued in society and can introduce misconceptions about dyslexia to all readers. It is crucial to analyze …

The Paradox Of Matriliny: Cultural Authority And The Political Marginalization Of Women In Meghalaya, Kasturi Bharadwaj

Journal of International Women's Studies

The global discourse on gender equality gained momentum after the 1975 United Nations World Conference on Women. It continued through a series of international initiatives and culminated in the Beijing Declaration and Platform for Action, which emphasized women’s rights and their participation in political, social, and economic life. Despite these normative commitments at the international level, women’s political participation and representation within administrative and decision-making structures continue to be uneven, limited, and structurally constrained across many societies. In this context, the study investigates the political participation and representation of women in Meghalaya, a tribal state in Northeast India characterized by …