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.

Submit to DRUM

Submit to DRUM

To submit an item to DRUM, login using your UMD credentials. Then select the "Submit Item to DRUM" link in the navigation bar. View DRUM policies and submission guidelines.
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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UM Community-managed Collections

Recent Submissions

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    Ingestible Capsule Technologies to Study and Treat Gastrointestinal Disorders
    (2025-07-25) Jackson, Ian; Karasik, Julie; Prasanna, Anika; Stephen, Jude; Rao, Rehan; Levy, Joshua; Lim, Mateo; Overton, Sydney; Straker, Michael; Ghodssi, Reza; Ghodssi, Reza
    The gastrointestinal (GI) tract contains different organs that pose broad implications for overall health. Advances in systems integration and miniaturization have allowed for the growth of ingestible capsules—non-invasive devices capable of a myriad of applications, including sensing specific biomarkers, performing biopsies, and locally delivering drugs—for patients suffering from GI disorders. However, current technologies lack low-power, remotely triggerable mechanisms to collect tissue samples for clinical relevance or the precision to release drugs into specific parts of the body. Further, no ingestible capsules exist that can quantify the spatiotemporal dynamics of neurotransmitters, including serotonin (5-HT), in real-time. Another gap in ingestible capsules development is packaging, which needs to be designed to prevent leaks and preserve isolation between internal and external environments. To address these issues, we aim to improve ingestible capsules by leveraging additive manufacturing, microelectromechanical systems (MEMS), and mesoscale systems, like linear actuators, 3D printed tissue collectors, and cantilevers, to simultaneously achieve more adaptable and robust prototypes as well as more rigorous in vitro testing methods. To validate the ingestible devices, several test setups were completed: a precise sensor to measure motor force, a load cell test to characterize actuator force, sealing tests to evaluate reliability and integrity, and a “lab-on-a-chip” to simulate the GI epithelium. Through the implementation of these mesoscale designs, clinicians can better diagnose and monitor GI disorders, enabling more efficient interventions and therapeutics.
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    “For billionaire booklovers”: George D. Sproul’s St. Dunstan Editions
    (University of Chicago Press, 2024-12) Hovde, Sarah
    This article introduces the St. Dunstan Illuminated Editions, a set of editions de luxe produced by New York-based publisher George D. Sproul between approximately 1901 and 1903, and attempts to place them within the history of other “deluxe” editions published around the turn of the century . It provides a brief history of the books’ publication plan, illuminators, and intended subscribers, as well as a short overview of legal actions during their initial publication phase. It finishes by looking at their shifting financial value since publication as seen through auction outcomes and booksellers’ pricing.
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    Microscopy movies used for Electric field driven dynamic assembly of active colloidal aggregates
    (2025) Srivastava, Satyam; Woehl, Taylor
    Active colloids self-propel and dynamically assemble in response to external fields and chemical reactions. Previous work has focused on single, monomeric active colloids. Here we show that electric fields drive binary mixtures of passive spherical colloids to aggregate into active clusters that self-propel, reshape, merge, and split. Self-propulsion arises from imbalanced electrohydrodynamic (EHD) flows, with a few large (4 μm) dielectric particles leading groups of smaller (2 μm) ones. Propulsion velocity decreases as large particles occupy more aggregate boundary, forming more symmetric, less active aggregates. Sustained self-propulsion and dynamic assembly occurs at sufficiently large particle concentration and when small particles outnumber large ones by 20–40 times. Splitting follows elongation and formation of hydrodynamically coupled clusters of large particles at aggregate poles. We present evidence that phoretic attraction (EHD flow) between aggregates drives mergers, while splitting occurs when tensile forces created by divergent self-propulsion of surface laden large particles overcomes cohesive EHD flows. Scaling analysis demonstrates the aggregate area dependence of merger and splitting rates to be consistent with these mechanisms. These results reveal how passive colloidal mixtures can be activated by electric fields to form self-organizing, reconfigurable microscale assemblies.
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    Build A Track: How to Learn and Teach Resource Sharing within the MLIS Curriculum
    (Journal of Library Resource Sharing, 2025-11-27) Norton, Brynne; Thompson, Hilary
    There is a need to prepare future resource sharing professionals, but this specialization is not typically part of the MLIS curriculum. To address this gap the authors propose building a track of courses that could prepare future librarians for a career in resource sharing when paired with learning outside the classroom. They demonstrate the feasibility of this approach by mapping RUSA’s Professional Competencies for Resource Sharing Practitioners (2024) and Guidelines for Resource Sharing Operations Management (2022) to the MLIS curriculum at the University of Maryland’s College of Information. Core courses and electives are evaluated to identify which competencies were being met through the curriculum, where hands-on learning or resource sharing community resources would be more effective, and courses that could feature resource sharing to further strengthen the pipeline.
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