Ultrashort Pulsed Laser Treatment Is Effective At Sterilizing Metal Surfaces For Planetary Protection,
2024
University of Nebraska-Lincoln
Ultrashort Pulsed Laser Treatment Is Effective At Sterilizing Metal Surfaces For Planetary Protection, Kaleb Mcquillan
Department of Electrical and Computer Engineering: Dissertations, Theses, and Student Research
To prevent forward contamination from microbes aboard spacecraft intended for exploration of solar system bodies there is a need for effective sterilization methods. However, current techniques are both time-consuming and expensive. For example, dry heat sterilization requires removal from the assembly site and several days of treatment. Furthermore, some components such as optics and electronics are not compatible with current sterilization techniques. In this thesis, a novel femtosecond laser surface processing technique for the rapid sterilization of spacecraft hardware is reported. Femtosecond lasers produce extremely high photon fluxes (1029 photons/s*cm2, ~0.03 J/cm2) in extremely short …
Space Program: Center For Space Research - Austin, Texas #3,
2024
Morehead State University
Space Program: Center For Space Research - Austin, Texas #3, Robert J. Twiggs
Robert "Bob" Twiggs STEM Education Collection
A PowerPoint presentation created by Professor Bob Twiggs titled "Space Program: Center for Space Research - Austin, Texas #3" from July 29, 2024.
Space Program: Center For Space Research - Austin, Texas #2,
2024
Morehead State University
Space Program: Center For Space Research - Austin, Texas #2, Robert J. Twiggs
Robert "Bob" Twiggs STEM Education Collection
A PowerPoint presentation created by Professor Bob Twiggs titled "Space Program: Center for Space Research - Austin, Texas #2" from July 29, 2024.
Notes For Contributors,
2024
University of Nebraska at Omaha
Waging Peace On The Final Frontier 64th Academy Assembly Proceedings,
2024
United States Air Force Academy
Waging Peace On The Final Frontier 64th Academy Assembly Proceedings, Space And Defense, Madison Walker
Space and Defense
In October 2022, the 64th annual Academy Assembly at the U.S. Air Force Academy took up the theme of “Waging Peace on the Final Frontier.” The following are proceedings of roundtables held by select undergraduates from around the country on questions of space policy & strategy.
Revitalizing America's Low-Yield Deterrent,
2024
United States Air Force Academy
Revitalizing America's Low-Yield Deterrent, Alex Kleitz
Space and Defense
An array of low-yield weapons will play a vital role in integrated deterrence. *The following essay, submitted in June 2022, earned the Junior Division USSTRATCOM General Larry D. Welch Deterrence Writing Award.
Annual Truman Lecture Usafa 64th Academy Assembly,
2024
USSPACEOM
Annual Truman Lecture Usafa 64th Academy Assembly, John Shaw
Space and Defense
In October 2022, on the occasion of the 64th annual Academy Assembly, focused on “Waging Peace on the Final Frontier,” the deputy commander of USSPACEOM Lieutenant General John Shaw spoke at the Air Force Academy’s endowed Truman Lecture, which itself was created to inspire cadets toward careers in National Security leadership.
Usafa 64th Academy Assembly Banquet Keynote On Nasa Transformation,
2024
United States Air Force Academy
Usafa 64th Academy Assembly Banquet Keynote On Nasa Transformation, Madison Walker, Lori Garver
Space and Defense
In October 2022, at the 64th annual Academy Assembly, focused on “Waging Peace on the Final Frontier,” the former deputy administrator of NASA the Honorable Lori Garver spoke at the Air Force Academy’s 64th Academy Assembly banquet keynote on the implications of NASA transformation for international security. She was introduced in a pre-recorded video by Susan Eisenhower, honorary founder of USAFA’s Eisenhower Center, and interviewed by USAFA Institute for Future Conflict Fellow Madison Walker.
The Unified Command Plan For A New Cold War,
2024
United States Air Force Academy
The Unified Command Plan For A New Cold War, David Stilwell
Space and Defense
No abstract provided.
Protecting The Cosmos: Defining Celestial Bodies In The Outer Space Treaty,
2024
U.S. Foreign Service
Protecting The Cosmos: Defining Celestial Bodies In The Outer Space Treaty, David Epstein
Space and Defense
Lack of a clear definition of the term “celestial bodies” as used in the 1967 Outer Space Treaty risks exporting legal and political conflict into the cosmos. *This essay is updated from a previously published version and appears here by permission of the Journal of Space Law at Ole Miss.
Editor's Note,
2024
University of Nebraska at Omaha
Table Of Contents,
2024
University of Nebraska at Omaha
Front Matter,
2024
University of Nebraska at Omaha
Space And Defense Volume 15 No. 1 Spring 2024 (Whole Issue),
2024
University of Nebraska at Omaha
Space And Defense Volume 15 No. 1 Spring 2024 (Whole Issue), Space And Defense
Space and Defense
No abstract provided.
Space Program: Center For Space Research - Austin, Texas #1,
2024
Morehead State University
Space Program: Center For Space Research - Austin, Texas #1, Robert J. Twiggs
Robert "Bob" Twiggs STEM Education Collection
A PowerPoint presentation created by Professor Bob Twiggs titled "Space Program: Center for Space Research - Austin, Texas" from July 12, 2024.
Slimsat,
2024
Morehead State University
Slimsat, Robert J. Twiggs, Nick Pugh
Robert "Bob" Twiggs STEM Education Collection
A PowerPoint Presentation created by Professor Bob Twiggs and Nick Pugh titled "SlimSat" from July 11, 2024.
Sliding Mode Control With Chattering Reduction,
2024
Embry-Riddle Aeronautical University
Sliding Mode Control With Chattering Reduction, Suryamshu Ramesh
Doctoral Dissertations and Master's Theses
Sliding Mode Control is a powerful nonlinear control methodology that can handle parametric uncertainties and external disturbances. However, the discontinuous and high-frequency switching nature of the control law introduces the chattering phenomenon, which leads to potential actuator degradation, alterations to the desired response characteristics and, sometimes, instability during control implementation. The main objective of this thesis is to study Sliding Mode Control with chattering reduction. The Sliding Mode Control law involves an equivalent control component and a discontinuous control component. A disturbance estimation is performed based on Lyapunov analysis and adaptive control techniques and then included in the control law …
Preliminary Analysis Of A 12u Astronomy Cubesat,
2024
California Polytechnic State University, San Luis Obispo
Preliminary Analysis Of A 12u Astronomy Cubesat, Charles Van Steenwyk
Master's Theses
The explosion of exoplanet astronomy has led to thousands of new discoveries and opportunities to be explored. The ability to capture images and perform meaningful science has resulted in an abundance of follow-on missions, surveys, and fostered a community of amateur astronomers in the last ten years. This success mirrors the development of CubeSats, which have proved an immensely popular way for students of all levels to access space and collect data. Multiple CubeSats have been developed to observe and characterize single exoplanet tran- sits, showing that this class of mission is possible. However, there is currently no mission designed …
The Effect Of Atomic Oxygen On Additively Manufactured Materials,
2024
California Polytechnic State University, San Luis Obispo
The Effect Of Atomic Oxygen On Additively Manufactured Materials, Ryan Grogan
Master's Theses
Additive manufacturing (AM) is a rapidly developing manufacturing method utilized in fields such as the aerospace industry. In-space AM is a technology of interest for the future of spaceflight, including on-orbit manufacturing. However, AM materials are subject to defects that may impact their performance in space-based applications. How these defects change the material’s reaction to the space environment, specifically atomic oxygen (AO), has only recently been explored. AO is a highly corrosive, dominant constituent in low Earth orbit that causes continuous erosion of spacecraft surfaces. The effect of AO on various AM materials is investigated in this thesis. Stainless steel, …
Developing A Lean Spacecraft Test And Evaluation Architecture For A Contested Space Domain,
2024
Air Force Institute of Technology
Developing A Lean Spacecraft Test And Evaluation Architecture For A Contested Space Domain, Stephen K. Tullino
Theses and Dissertations
The US Space Force (USSF) is currently investigating possible opportunities to improve the testing paradigm of spacecraft in order to get assets on-orbit faster, while maintaining suitable quality to meet mission needs in a contested space environment. To support this goal, USSF’s approach to test and evaluation (T&E) is centered around the concept of integrated test. In this research, the space text lexicon is defined, addressing the ambiguities on exactly what integrated test is with respect to spacecraft systems development and on-orbit mission assurance. This research considered any statistical trends in categorical discrepancies (i.e., anomalies) during prelaunch integration and test …
