DRUM - Digital Repository at the University of Maryland

DRUM collects, preserves, and provides public access to the scholarly output of the university. Faculty and researchers can upload research products for rapid dissemination, global visibility and impact, and long-term preservation.

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Submit to DRUM

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Equitable Access Policy

Equitable Access Policy

The University of Maryland Equitable Access Policy provides equitable, open access to the University's research and scholarship. Faculty can learn more about what is covered by the policy and how to deposit on the policy website.
Theses and Dissertations

Theses and Dissertations

DRUM includes all UMD theses and dissertations from 2003 forward.

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Recent Submissions

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    Process-Induced Chemical Reactions on Interfaces of Thin Film Ionic Materials
    (2026-03) Ferrari, Victoria; Steward, David; Rubloff, Gary
    This dataset supports a study of process-induced interfacial reactions — specifically, spontaneous lithium transfer (autolithiation) — occurring during magnetron sputter deposition of thin dielectric lithium-containing films (lithium phosphorus oxynitride, LiPON, and lithium oxide, Li₂O) onto vanadium pentoxide (V₂O₅) underlayers. Ten sample configurations were fabricated on a single silicon wafer substrate using an in-situ mask exchanger-equipped sputtering system, with overlayer thicknesses of 10 and 20 nm and either room-temperature or 300 °C post-annealing conditions. The dataset includes raw electrochemical, spectroscopic, and optical measurements used to characterize the compositional, structural, optical, and electrical properties of the V₂O₅ underlayers and LiPON/Li₂O overlayers as a function of deposition conditions. These measurements demonstrate that autolithiation proceeds concurrently with overlayer film growth and is governed by thermodynamic decomposition at the film interface. LiPON forms stable, electron-blocking overlayers as thin as 15 nm while lithiating the V₂O₅ at rates of approximately 1 μA/cm², whereas Li₂O deposition results in near-complete lithium transfer into the V₂O₅, achieving compositions approaching Li₃V₂O₅ with less than 2 nm of residual overlayer. The findings have direct implications for the rational design of thin-film fabrication sequences for energy storage, electrochemical random-access memory (ECRAM), and neuromorphic devices.
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    Design and Implementation of a Six-Element Autonomous Active Aerodynamics System for Formula SAE
    (2026) Kuchar, Duncan; Hamilton, Leonard; Xu, Huan
    This paper presents the design, fabrication, and validation of a fully autonomous active aerodynamics system for the 2025 University of Maryland internal combustion Formula SAE (FSAE) vehicle, also known as the Terps Racing TR25. The autonomous active aerodynamics system was showcased at the 2025 Michigan FSAE competition, receiving the Second Place Innovation Award. To resolve the conflict between high downforce required for cornering and low drag required for longitudinal acceleration and good fuel economy, a six-element active wing package was developed, comprising four actuated flaps on the front wing and two actuated flaps on the rear wing. The system is governed by a finite state machine algorithm that processes data from wheel speed, steering angle, throttle position, brake pressure, and inertial sensors to estimate vehicle states and execute coordinated actuation. To ensure reliability and adaptability, the system incorporates robust failure mitigation protocols and a driver interface for on-the-fly sensitivity tuning to match driver styles and track conditions. Computational fluid dynamics and track testing demonstrate a 49% reduction in drag coefficient (𝐶𝐷 from 1.44 to 0.73) between the high and low-drag configurations. Validated lap time simulations predict a 1.47-second and 42.4-second (2.6%) improvement in Autocross and Endurance dynamic events (based on the 2024 competition tracks), respectively, alongside a 7.2% increase in fuel efficiency, and a 0.08-second (1.9%) improvement in the Acceleration dynamic event. Additionally, the system enables a longitudinal center of pressure migration from 78% to 20% (% of total downforce on front tires), providing a foundation for active balance control through dynamic track states.
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    'Strategizing' by Personnel in Hospitals: A Scoping Review
    (2026-03-04) Fouladi, Negin; Tchangalova, Nedelina; Hashmi, Maryam Aslam; Millwee, Elizabeth; Ajayi, Damilola; Din, Abdu Wakil Cyeef; Mulhall, Gabriela Irene; Jones, Brendan; Griffin, Lindsey; Amon-Kotei, Nii Amon; Schwartz, Brad E.; Adeoti, Moboluwape D.; Kroll, Thilo; Donohoe, Carolyn; Frazer, Kate
    INTRODUCTION: Hospitals are important ecosystems and vital to healthcare delivery. Uncertainty challenges the development of strategic practice capacity and functional flexibility, as well as the ability to keep pace with the evolving definition of services. This scoping review examines evidence on strategizing practices, often termed ‘strategy-as-practice,’ reported by hospital staff in professional and managerial roles, focusing on strategy development, implementation, and evaluation. METHODS: The Population, Concept, Context (PCC) framework guided the scoping review. Four databases (PubMed, CINAHL, PsycINFO, and Business Source Complete) were searched initially in 2023, with an update in 2024. Eligibility criteria included studies focused on adults and hospital settings. Records published in English from 2018 to 2024 were included. We located 6,044 records and uploaded them to Rayyan. Titles and abstracts were independently screened, and 562 full-text papers were assessed for eligibility. An initial analysis using ChatGPT helped identify key themes aligned with the objectives, followed by an independent review by the authors to verify accuracy and ensure reliability and rigor. RESULTS: We included 51 studies and identified seven themes influencing strategizing and planning: 1) Awareness and education, 2) Resource constraints, 3) Organizational culture and leadership, 4) Operational challenges, 5) Interdisciplinary collaboration, 6) External pressure and stakeholder dynamics, and 7) Cultural and structural factors. Facilitators included safe environments and incident reporting systems. The barriers highlighted data silos, increased workloads, and workforce challenges, including time constraints. CONCLUSION: Hospitals need clearly defined strategies, comprehensive quality frameworks, and strong leadership. The evidence underscores the importance of continuous staff development, patient safety systems, and technology integration as critical components for effecting change.
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    Electronic Supporting Data for Molecular Recognition Properties of Water Soluble Prism[5]arene Toward Drugs of Abuse
    (2026) Kaur, Gurpreet; Bazan-Bergamino, Emmanuel A.; Zhai, Canjia; Ashton, Sydney; Isaacs, Lyle; Isaacs, Lyle
    We report our study of the binding of a water soluble prism[5]arene (WPr[5]) toward a panel of 11 drugs of abuse by a combination of 1H NMR spectroscopy, isothermal titration calorimetry (ITC), and molecular modelling. 1H NMR spectroscopy showed that the narrower drugs (fentanyl, methamphetamine, MDMA, mephedrone) exhibited dramatic upfield shifts ( up to -4.8 ppm) upon complexation due to the 5 convergent magnetically shielding naphthalene walls of WPr[5]. Analysis of the complexation induced changes in chemical shift, backed up by molecular modelling, showed that WPr[5] encircles the ammonium ion region to engage in cation- interactions rather than complexing the terminal aryl rings of the drug. The larger drugs (morphine, heroin, oxycodone, hydrocodone) do not undergo cavity inclusion binding with WPr[5]. Direct and competitive ITC was used to determine the binding constants and enthalpies of complexation in PBS which range up to 1.11 × 107 M-1 for WPr[5]•fentanyl and -9.26 ± 0.04 kcal mol-1 for WPr[5]•MDMA. We performed in vitro assays using HEK293 and Hep G2 cells which establish good cytocompatibility up to 33 M. Finally, an in vivo maximum tolerated dose study using female Swiss Webster mice showed that WPr[5] is well tolerated up to 45 mg/kg.
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    Granger Sensori-Behavioral Taxonomy of Neuronal Ensemble Activity from Two-Photon Calcium Imaging Data
    (2026) Khosravi, Sahar; Francis, Nikolas; Kanold, Patrick; Babadi, Behtash