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Space-based laser guide stars for astronomical observatories
(Massachusetts Institute of Technology, 2020)
The Laser Guide Star (LGS) concept is proposed to enable reductions in cost of next-generation space telescopes, by providing reference targets (as bright as apparent magnitude -7) to enable wavefront stability and control ...
Covariance estimation on matrix manifolds
(Massachusetts Institute of Technology, 2020)
The estimation of covariance matrices is a fundamental problem in multivariate analysis and uncertainty quantification. Covariance matrices are an essential modeling tool in climatology, econometrics, model reduction, ...
Development of low-thrust solid rocket motors for small, fast aircraft propulsion
(Massachusetts Institute of Technology, 2020)
Small, uncrewed aerial vehicles (UAVs) are expanding the capabilities of aircraft systems. However, a gap exists in the size and capability of aircraft: no small aircraft are capable of sustained fast flight. A small, fast ...
Space and aerial architectures to expand global connectivity
(Massachusetts Institute of Technology, 2020)
Currently, 46.4% of the world's population does not have access to the Internet. Bringing the more than 3.5 billion individuals still unconnected online is the primary goal for multiple international organizations, including ...
An adaptive variational multiscale method with discontinuous subscales for aerodynamic flows
(Massachusetts Institute of Technology, 2020)
A promising methodology for accurate and efficient simulation of aerodynamic flows is output-based mesh adaptation, which optimizes a mesh to minimize the discretization error in an output of interest. The state of the art ...
Experiments in electroaerodynamic propulsion
(Massachusetts Institute of Technology, 2020)
Electroaerodynamic (EAD) propulsion, which produces a thrust force by electrokinetic acceleration of ions in air, is a proposed method of electric airplane propulsion that is solid-state, nearly silent, and produces no ...
Deformation-assisted antifouling of surfaces
(Massachusetts Institute of Technology, 2020)
Fouling of surfaces occurs across many scales and applications, ranging from biomedical devices to ships, from membrane separation processes to ice formation on the wings of planes Chemical cleaning of the surfaces is often ...
Towards fuel-efficient formation flying of an observatory and external occulter at Sun-Earth L2
(Massachusetts Institute of Technology, 2020)
The prolific discovery of habitable zone residing exoplanets via indirect detection methods have spurred many in the astrophysics and space technology community to call for the prioritization of funding for a direct exoplanet ...
New problems in revenue management, theory and applications
(Massachusetts Institute of Technology, 2020)
This thesis studies new applications of revenue management that can be used by airlines and the ride-sharing industry. Our first and main focus is on online advertising with applications to advertisement of flight tickets. ...
Leveraging prior information for real-time monocular simultaneous localization and mapping
(Massachusetts Institute of Technology, 2021)
Monocular cameras are powerful sensors for a variety of computer vision tasks since they are small, inexpensive, and provide dense perceptual information about the surrounding environment. Efficiently estimating the pose ...