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.

List of Communities

Collections Organized by Department

UM Community-managed Collections

Recent Submissions

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    A Deployable Sensor Platform for Contactless Health Observations in Uncontrolled Environments
    (AIAA, 2026) Regli, Anthony; Serrano, Brian; Paley, Derek
    This work aims to investigate and improve the capabilities of contactless vital sign monitoring systems (CVSMs) in environments with increased variance in lighting and subject pose using a deployable hardware platform designed for use in the DARPA Triage Challenge (DTC). Current research into CVSMs primarily focuses on their use in controlled environments, like sitting at a desk or driving a vehicle. The deployable platform, henceforth referred to as the Sensor Package for Updated Diagnosis (SPUD), is designed to operate in a disaster-response triage scenario as represented by the DTC, and consists of a Raspberry Pi along with a near-infrared time-of-flight (TOF) camera used to obtain intensity and depth images. Heart rate (HR) and respiratory rate (RR) are estimated from the datastream via a ROS2 pipeline that can then be integrated into a larger network of autonomous systems for potential use as part of the DTC. We analyze how the system performs under a variety of subject positions. We struggled to replicate the success of HR CVSM techniques, but research is continuing to improve the accuracy of this system. For an ideal subject seated at a desk, we find an RR estimation to be within 10% of ground truth in 85% of tests. In other testing configurations, RR estimate accuracy stays within 10% of ground truth in a minimum of 55% of tests.
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    Investigating toxicity of deep-sea mining effluent and potential ecotoxicological effects in the eastern Clarion-Clipperton Zone of the Pacific Ocean
    (Elementa: Science of the Anthropocene, 2026) Yonkos, Lance
    Preserving the ecological structures and functions of deep midwater ecosystems is vital to the planet. These vast environments provide essential ecosystem services including nutrient cycling, carbon sequestration, climate regulation, and prey resources that support global fisheries. Fully understanding the potential effects of deep-sea mining (DSM) is crucial to ensure that extraction practices conserve vital ecosystem services. Of particular concern are the impacts of metals and other harmful contaminants from metal-rich sediment and nodules released as discharged effluent into midwater ecosystems. Here we investigated toxicity within the aqueous fraction of DSM effluent (sediments removed) using whole effluent toxicity tests with model marine vertebrate (sheepshead minnow, inland silverside), invertebrate (mysid shrimp, marine rotifer), and microbial (bioluminescent Aliivibrio fischeri) species. All species indicated some level of detectable toxicity in DSM samples, with the rotifer (Brachionus plicatilis) generally being the most sensitive. Approximately 25% of DSM samples caused statistically significant reductions in survival to marine rotifers and inland silverside, or reductions in growth in mysid shrimp and sheepshead minnow. Observed toxicity did not correlate with measured dissolved Cu or Zn concentrations, suggesting the possible importance of other contaminants. The bioluminescence assay proved highly variable and not predictive of toxicity observed in other tested marine taxa. The marine rotifer assay is recommended as a preferable tool for ship-board monitoring of DSM-effluent toxicity to marine biota. The discharge plume will dilute upon discharge and represent a continuum of exposure concentrations and longer-term exposures. Future investigations should include comprehensive chemical analysis of organic and inorganic compounds within the dissolved and particulate fractions of the effluent and assess ecotoxicological effects of the copious particulate constituents, including microplastics, present in the discharge. Midwater species of particular interest, including soft-bodied taxa, should be identified and methods developed to assess bulk toxicity of DSM discharge to relevant uniquely sensitive biota.
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    Archives Outside the Institution: A Review of Archival Needs and Impact in Small Arts Organizations
    (2026-01-23) Barbera, Katherine; Bernabo, David
    Small organizations working to preserve their records and history face myriad challenges, including limited funding opportunities, finite resources, and gaps in staffing or expertise. Despite these obstacles, some choose to take on this important work because the alternative is far worse: seeing their records discarded, their stories misrepresented, or their history lost entirely. In this conversation, drawing on both our own experiences and extrapolating from research on community archives, we explore archival work happening outside traditional institutions. We’ll focus on small-sized organizations in the arts—from artist collectives to performance groups—highlighting their needs, which often go beyond conventional archival practice, and showing how they can benefit from archival activities. We’ll also explore ways in which the field can better support these organizations and others like them.
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    Trust My Process: Creative Solutions for Hybrid and In-Office Archival Processing
    (2026-03-19) Glasbrenner, Meghan; Menjivar, Amanda; Vay, Bob
    The Special Collections Research Center (SCRC) at George Mason University Libraries currently staffs only three processing archivists - so how are we tackling a backlog of thousands of linear feet of collections? Please join SCRC archivists Meghan Glasbrenner, Amanda Menjivar, and Bob Vay in this Caucus Conversation to discuss just that. Through lessons learned working at home during the COVID lockdown, as well as allowing processors to tailor workflows to their strengths and preferences, SCRC has managed to significantly increase its processing output through creative and adaptive strategies. We hope you’ll be able to apply some of our strategies to your organization and find useful takeaways in this Caucus Conversation.
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