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Flexible spectral algorithms for simulating astrophysical and geophysical flows
(Massachusetts Institute of Technology, 2018)
Large-scale numerical simulations are key to studying the complex physical systems that surround us. Simulations provide the ability to perform simplified numerical experiments to build our understanding of large-scale ...
Functional and cross-trait genetic architecture of common diseases and complex traits
(Massachusetts Institute of Technology, 2017)
In this thesis, I introduce new methods for learning about diseases and traits from genetic data. First, I introduce a method for partitioning heritability by functional annotation from genome-wide association summary ...
High-resolution studies of charge exchange in supernova remnants with Magellan, XMM-Newton, and Micro-X
(Massachusetts Institute of Technology, 2014)
Charge exchange, the semi-resonant transfer of an electron from a neutral atom to an excited state in an energetic ion, can occur in plasmas where energetic ions are incident on a cold, at least partially neutral gas. ...
Distributed optimization and market analysis of networked systems
(Massachusetts Institute of Technology, 2014)
In the interconnected world of today, large-scale multi-agent networked systems are ubiquitous. This thesis studies two classes of multi-agent systems, where each agent has local information and a local objective function. ...
Impact of electrochemical process on the degradation mechanisms of AlGaN/GaN HEMTs
(Massachusetts Institute of Technology, 2014)
AlGaN/GaN high electron mobility transistors (HEMTs) constitute a new generation of transistors with excellent electrical characteristics and great potential to replace silicon technology in the future, especially in high ...
Medial olivocochlear efferent (MOC) effects on stimulus frequency otoacoustic emissions (SFOAEs) and auditory-nerve compound action potentials (CAP) in guinea pigs
(Massachusetts Institute of Technology, 2015)
In humans, SFOAEs can non-invasively assess MOC strength and, may predict the MOC reduction of damage from traumatic sounds. However, the functionally important MOC effect is inhibition of auditory-nerve (AN) responses. ...
Materials and device design for MEMS piezoelectric mechanical vibration energy harvesters
(Massachusetts Institute of Technology, 2012)
Piezoelectric vibration energy harvesters (PVEHs) for microelectromechanical systems (MEMS) have received considerable attention as an enabling technology for self-powered wireless sensor networks. MEMS-PVEHs are particularly ...
CHAOS, holography, and other science
(Massachusetts Institute of Technology, 2016)
This thesis focuses on the relationship between black holes in holography, chaos in strongly-coupled quantum systems, and the computational complexity of holographic states. By directly considering the time evolution of ...
21 cm cosmology with optimized instrumentation and algorithms
(Massachusetts Institute of Technology, 2016)
Precision cosmology has made tremendous progress in the past two decades thanks to a large amount of high quality data from the Cosmic Microwave Background (CMB), galaxy surveys and other cosmological probes. However, most ...
Self-seeded II-V semiconductor nanowire growth by metal-organic chemical vapor deposition (MOCVD)
(Massachusetts Institute of Technology, 2016)
III-V semiconductor epitaxial nanowires have gained significant attention in recent years, as they showcase an opportunity to combine III-V material properties with a non-planar morphology. To date, semiconductor devices ...