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Items (1-20) out of 150 results

3D Neutron Diffraction Studies on the Vortex Lattice

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Description:: In condensed matter physics the vortex lattice of type-II superconductors provides a prototype for studying the effect of random pinning on elastic systems. One important ...
Copyright Date:: 2012
Contributors:: Wang, Xi (creator) Ling, Xinsheng (Director) Kosterlitz, J. (Reader) Mitrovic, Vesna (Reader) Brown University. Physics (sponsor)
Genre:: theses
Keywords:: neutron diffraction vortex lattice screw dislocation Neutrons--Diffraction

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A Measurement of the Top Quark Mass in the Lepton + Jets Channel using the Ideogram Technique at D\O\

Description:: This thesis presents a measurement of the mass of the top quark. The top quarks are produced through proton-antiproton collisions with $\sqrt{s}$=1.96 ...
Copyright Date:: 2013
Contributors:: PARIHAR, Vivek Singh (creator) Heintz, Ulrich (Director) Cutts, David (Reader) Narain, Meenakshi (Reader) Brown University. Physics (sponsor)
Genre:: theses
Keywords:: top quark mass ideogram D0 Tevatron Jets

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A Position-Sensitive Liquid Xenon Time-Projection Chamber for Direct Detection of Dark Matter: The XENON10 Experiment

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Description:: Recent astrophsyical observations indicate that about 23% of the matter in the universe exists as non-luminous, non-baryonic dark matter. General thermodynamic arguments suggest that if ...
Copyright Date:: 2008
Contributors:: Sorensen, Peter F (creator) Gaitskell, Richard (Director) Robert, Lanou (Reader) Dell'Antonio, Ian (Reader) Brown University. Physics (sponsor)
Genre:: theses
Keywords:: WIMP dark matter liquid Xe Dark matter (Astronomy)

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A Search For Heavy Charged Higgs Bosons in the CMS Experiment

Description:: The Standard Model (SM) of Particle Physics has proven to be an incredible mathematical framework for describing the observed elementary particles that make up the ...
Copyright Date:: 2016
Contributors:: Garabedian, Alex E (creator) Narain, Meenakshi (Director) Heintz, Ulrich (Reader) Cutts, David (Reader) Brown University. Physics (sponsor)
Genre:: theses
Keywords:: Charged Higgs CMS 2HDM

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A search for long-lived particles that stop in the CMS detector and decay to muons

Description:: A search for long-lived particles that are produced in proton-proton collisions at the CERN LHC, come to rest in the CMS detector, and decay to ...
Copyright Date:: 2016
Contributors:: Alimena, Juliette (creator) Cutts, David (Director) Narain, Meenakshi (Reader) Fan, JiJi (Reader) Brown University. Physics (sponsor)
Genre:: theses
Keywords:: particle physics LHC CMS long-lived exotic particles Muons

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A vortex shedding model for unsteady fluid dynamics

Description:: A new model, based on matched asymptotic analysis, for the simulation of two-dimensional unsteady flows around structures, has been developed and tested on a wide ...
Copyright Date:: 2016
Contributors:: Guo, Xinjun (creator) Mandre, Shreyas (Director) Powers, Thomas (Reader) Valles, James (Reader) Brown University. Physics (sponsor)
Genre:: theses
Keywords:: boundary layer approximation Vortex shedding

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Amorphous Germanium Nanostructures: Optical Characterization and Applications for Improved Photodetector Performance

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Description:: In this thesis, I first focus on the study of the optical properties of three kinds of amorphous germanium (Ge) nanostructures: Ge ultra-thin films, Ge-SiO2 ...
Copyright Date:: 2016
Contributors:: Liu, Pei (creator) Pacifici, Domenico (Director) Valles, James (Reader) Marston, John (Reader) Brown University. Physics (sponsor)
Genre:: theses
Keywords:: amorphous germanium nanostructures photodetectors plasmonics Optical detectors

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An Absolute Calibration of Sub-1 keV Nuclear Recoils in Liquid Xenon Using D-D Neutron Scattering Kinematics in the LUX Detector

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Description:: We propose a new technique for the calibration of nuclear recoils in large noble element dual-phase time projection chambers (TPCs) used to search for WIMP ...
Copyright Date:: 2016
Contributors:: Verbus, James R (creator) Gaitskell, Richard (Director) Dell'Antonio, Ian (Reader) Narain, Meenakshi (Reader) Brown University. Physics (sponsor)
Genre:: theses
Keywords:: LUX liquid xenon nuclear recoil light yield charge yield neutron generator dark matter WIMP Dark matter (Astronomy)

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Analysis of brain signals with machine learning and information-theoretic methods

Description:: This thesis presents the techniques we have developed in analyzing brain signals obtained from the most commonly used brain imaging methods, e.g., EEG/MEG ...
Copyright Date:: 2008
Contributors:: Wu, Liang (creator) Cooper, Leon (director) Ombao, Hernando (reader) Neskovic, Predrag (reader) Brown University. Physics (sponsor)
Genre:: theses
Keywords:: brain signals Machine learning Information theory Classification

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Analytic Quantum Chromodynamics: An Exact, Finite, Non-Perturbative, Gauge-Invariant, Realistic Model of QCD, with A Particular Choice of Renormalization with Applications to High Energy Elastic Proton-Proton Scattering.

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Description:: A new non-perturbative, gauge-invariant, exact, finite model of quantum chromody- namics, with a particular choice of renormalization is applied to high energy elastic pp- scattering ...
Copyright Date:: 2016
Contributors:: Tsang, Peter H (creator) Fried, Herbert (Director) Jevicki, Antal (Reader) Tan, Chung-I (Reader) Brown University. Physics (sponsor)
Genre:: theses
Keywords:: high energy theory high energy physics particle physics non-perturbative gauge-invariant,quantum field theory schwinger action Quantum chromodynamics Particles (Nuclear physics) Quarks Gluons Feynman diagrams Schwinger action principle

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Anodic alumina as a scalable platform for structural coloration and optical rectification

Description:: Anodized aluminum oxide (AAO) is an interesting material, occupying a unique space -- already used incredibly widely in the world, yet also commonly used for nanoscience ...
Copyright Date:: 2017
Contributors:: Oller, Declan Danesh (creator) Xu, Jimmy (Advisor) Valles, James (Reader) Mitrovic, Vesna (Reader) Brown University. Department of Physics (sponsor)
Genre:: theses
Keywords:: Optics Nanotechnology Nanoscience nanofabrication filamentation resistive switching optical rectification structural coloration physical coloration Fabry-Perot interferometers fabry perot optical cavity optical resonator Thin films--Optical properties Aluminum Aluminum alloys anodized aluminum aao Aluminum--Anodic oxidation anodic alumina anodization Aluminum oxide coloration

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Applications of Discontinuous Galerkin Methods to Computational General Relativity

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Description:: We discuss a discontinuous Galerkin (dG) method and its application to common partial differential equations which arise in the context of general relativity. First we ...
Copyright Date:: 2011
Contributors:: Field, Scott Edward (creator) Hesthaven, Jan (Director) Guralnik, Gerald (Reader) Dell'Antonio, Ian (Reader) Brown University. Physics (sponsor)
Genre:: theses
Keywords:: Numerical Relativity Spectral Methods Relativity and gravitational theory General relativity Black holes Discontinuous Galerkin method Model reduction Reduced Basis methods Collocation methods General relativity (Physics)

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Applications of Entropic DNA Trapping to Studies of Giant Acceleration of Diffusion and a Novel Restriction Mapping Method

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Description:: This dissertation presents two experimental studies of DNA polymers inside nanofluidic devices with well-defined topographic features. Those features include square pits and rectangular trenches etched ...
Copyright Date:: 2017
Contributors:: Kim, Daniel (creator) Stein, Derek (Advisor) Valles , James (Reader) Pelcovits, Robert (Reader) Matzavinos, Anastasios (Reader) Brown University. Department of Physics (sponsor)
Genre:: theses
Keywords:: DNA sequencing Physics Biophysics Diffusion Nonlinear systems DNA

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Aspects of AdS/CFT Correspondence: Symmetries, Integrability and Solitons

Description:: The AdS/CFT correspondence is a conjecture which relates gauge theories to string theories. In order to better understand this duality, several avenues can be ...
Contributors:: Aniceto, Ines V. (creator) Jevicki, Antal (director) Volovich, Anastasia (reader) Tan, Chung-I (reader) Brown University. Physics (sponsor)
Genre:: theses
Keywords:: AdS/CFT Semi-Classical Strings Integrable Structures Giant Magnons Symmetry Algebra Solitons

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Aspects of High Energy Scattering and AdS/CFT

Description:: We study several aspects of high energy scattering using the AdS/CFT correspondence.We begin with concise theoretical overviews of a few relevant topics. First ...
Contributors:: Djuric, Marko (creator) Tan, Chung-I (Director) Jevicki, Antal (Reader) Spradlin, Marcus (Reader) Brown University. Physics (sponsor)
Genre:: theses
Keywords:: High Energy AdS/CFT DIS Odderon