Welcome to the repository for University of Maryland research.

The 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.

  • Faculty may use DRUM to fulfill the Equitable Access to Scholarly Articles Authored by University Faculty policy, and in many cases may use it to fulfill open access requirements from grant funding agencies.
  • Departments can use DRUM to publish or distribute their working papers, technical reports, or other research material.
  • DRUM also includes all UMD theses and dissertations from 2003 forward.

To learn more about DRUM submission guidelines, and how you can make your research openly accessible to the public, visit our DRUM policies website.

To submit an item to DRUM, login using your UMD credentials. Then select the "Submit Item to DRUM" link in the navigation bar.

 

Recent Submissions

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Terrapin Rocket Team's Technical Report to the 2023 Spaceport America Cup
(2023) Daniel, Hailu; Bean, Andrew; Bregin, Ezra; Gill, Dasam; Roy, Nathan; M Jaffar, Mohamed Khalid; Alessandrini, Garret; Mallamaci, Michael; Goldberg, Adin; Zheng, Howard; Rizvi, Saim
This document presents the University of Maryland’s 10,000 ft SRAD Motor Category rocket, Karkinos. It is the third time that the team will be attending the Cup in person since 2018, and the current team has built on the lessons learned at the 2022 Cup. The design process for Karkinos is centered around manufacturability and reliability coupled with a rigorous testing process. This report also documents the design of our Air Brake system that actively trims the rocket’s altitude during flight. The CubeSat payload for this rocket will test the release of a vehicle from the rocket during drogue descent.
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Simulation of packet dropouts over wireless channels considering Rayleigh fading effects
(2020) M Jaffar, Mohamed Khalid; Otte, Michael
This document describes how we implement a Rayleigh fading model for use in a multi-robot communication simulation. The main objective of this work is to characterize communication losses in multi-agent settings that require high levels of collaboration.
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Feedback motion replanning during high-stakes scenario
(2019) M Jaffar, Mohamed Khalid; Otte, Michael
This paper proposes a novel algorithm for a quadrotor to replan its motion in the event of one, two or three rotor loss. Further, during the course of its replanned trajectory, the MAV avoids collision with static obstacles including the ground.
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Terrapin Rocket Team's Technical Report to the 2022 Spaceport America Cup
(2022) Bregin, Ezra; Bean, Andrew; Daniel, Hailu; Roy, Nathan; M Jaffar, Mohamed Khalid; Alessandrini, Garret; Mallamaci, Michael; Goldberg, Adin; Zheng, Howard; Gill, Dasam
This document presents University of Maryland’s 10,000 ft COTS Motor Category rocket, Terpulence II. This project is a return to high power rocketry fundamentals within the Terrapin Rocket Team. It is the first time that the team will be attending the Cup in person since 2018 and the first time any current team members will compete at Spaceport. The design process is targeted at building off of other successful projects and manufacturing a safe and reliable competition rocket. This reports also documents the design of a novel air brake system that increases the rocket performance to reach a desired apogee. The CubeSat payload for this rocket will test liquid fuel tank geometry to gauge if capillary action can replace ullage motors in micro-gravity environments.
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Born digital, born accessible: Making the documents and data in open scholarship accessible to all
(2024-02-13) Lim, Adriene; Lazar, Jonathan; Rosen, Stephanie S.; Woodbrook, Rachel; Carpenter, Lindsay Inge
The open scholarship / open science movement is based in part on the principle of equitable access to knowledge as a human right. But how equitable is that access if the documents and data produced in these frameworks are themselves not readily accessible to people with disabilities? In this webinar, experts will present the case for making the born-digital products of research accessible at the point of creation and will provide basic tools and techniques for making sure that born-digital documents and data are also accessible at the point of creation. This virtual workshop is sponsored by the UMD Libraries and UMD PACT and is part of a series of events at the University of Maryland commemorating the OSTP Year of Open Science.