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Accelerated clustering through locality-sensitive hashing
(Massachusetts Institute of Technology, 2012)
We obtain improved running times for two algorithms for clustering data: the expectation-maximization (EM) algorithm and Lloyd's algorithm. The EM algorithm is a heuristic for finding a mixture of k normal distributions ...
Testing models of ultra-fast India-Asia convergence : new paleomagnetic results from Ladakh, Western Himalaya
(Massachusetts Institute of Technology, 2014)
Rapid India-Asia convergence has led to a major continental collision and formation of the Himalayas, the highest mountain range on Earth. Knowledge of the paleolatitude of the Kohistan-Ladakh Arc (KLA), an intermediate ...
Constraining the QSO luminosity function using gravitational lensing statistics
(Massachusetts Institute of Technology, 2004)
In this thesis we use gravitational lensing statistics to constrain the QSO luminosity function at a variety of redshifts. We present a theoretical discussion of gravitational lensing statistics and illustrate how high ...
Computational neutronics analysis of TRIGA reactors during power pulsing
(Massachusetts Institute of Technology, 2011)
Training, Research, Isotopes, General Atomics (TRIGA) reactors have the unique capability of generating high neutron flux environments with the removal of a transient control rod, creating conditions observed in fast fission ...
Identifying boosted objects with N-subjettiness and linear k-means clustering
(Massachusetts Institute of Technology, 2011)
In this thesis, I explore aspects of a new jet shape - N-subjettiness - designed to identify boosted hadronically-decaying objects (with a particular focus on tagging top quarks) at particle accelerators such as the Large ...
Experimental simulation of crevice corrosion of a functionally graded composite system of F91 and Fe-12Cr-2Si exposed to high-temperature lead-bismuth eutectic coolant
(Massachusetts Institute of Technology, 2011)
In a system in which metal corrosion is of concern to its long-term structural integrity, crevice corrosion can be a significant cause of damage. Small crevices in a metal exposed to a working fluid (such as a reactor's ...
The dynamics of enzymatic switch cascades
(Massachusetts Institute of Technology, 2004)
We examine the dynamics of the mitogen-activated protein kinase (MAPK) multi-step enzymatic switching cascade, a highly conserved architecture utilised in cellular signal transduction. In treating the equations of motion, ...
Total-to-peak ratios of high purity germanium gamma ray detector
(Massachusetts Institute of Technology, 2004)
This study is concerned with the percentage of [gamma]-rays of a certain energy having their energy correctly measured by a high purity Germanium [gamma]-ray detector. The ratio between the total counts and the counts ...