Eric Swenson
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View article: Periodic geodesics in singular spaces
Periodic geodesics in singular spaces Open
We extend the classical result of Lyusternik and Fet on the existence of closed geodesics to singular spaces. We show that if $X$ is a compact geodesic metric space satisfying the CAT($κ$) condition for some fixed $κ>0$ and $π_n(X)\ne 0$ f…
View article: Validating Deployment Dynamics of the Canisterized Satellite Dispenser (CSD)
Validating Deployment Dynamics of the Canisterized Satellite Dispenser (CSD) Open
Planetary Systems Corporation (PSC) designed the CSD to be a more secure, predictable, and consistent CubeSat deployment system. Though the CSD has proven its safety and reliability on orbit and in other air-and ground-based tests, there w…
View article: Relatively hyperbolic groups with free abelian second cohomology
Relatively hyperbolic groups with free abelian second cohomology Open
Suppose $G$ is a 1-ended finitely presented group that is hyperbolic relative to $\mathcal P$ a finite collection of 1-ended finitely presented proper subgroups of $G$. Our main theorem states that if the boundary $\partial (G,{\mathcal P}…
View article: Thermal Transport Properties of Dry Spun Carbon Nanotube Sheets
Thermal Transport Properties of Dry Spun Carbon Nanotube Sheets Open
The thermal properties of carbon nanotube- (CNT-) sheet were explored and compared to copper in this study. The CNT-sheet was made from dry spinning CNTs into a nonwoven sheet. This nonwoven CNT-sheet has anisotropic properties in in-plane…
View article: Impacts of Control Moment Gyroscope Gear Slack on Spacecraft Pointing Performance
Impacts of Control Moment Gyroscope Gear Slack on Spacecraft Pointing Performance Open
Testing spacecraft attitude control hardware and algorithms is difficult to perform in a lab setting and models are sometimes impractical or very challenging to create. Satellite simulators allow testing of integrated hardware and software…