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Master of Science in Physics
Master of Science in Physics
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42 results
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ItemDeep Learning Enhanced Biofilm Topography through Convolutional Neural Network(Georgia Institute of Technology, 2023-05-02) Zhao, LinBiofilms are surface attached communities microbes. One approach to study the formation and growth of biofilms is to observe its surface topography, such as with white light profilometry. However, this technique requires taking images of many fields of view and stitching them together, a time-consuming process. We thus sought to develop a convolutional neural network to that can convert low-resolution images to high-resolution images. Our results show that the technique succeeds with a low mean absolute error (~10^-4). We also found that the model prediction error is highly related to the biofilm's topographic roughness. As a result, highly rough surfaces are crucial resources for training deep learning super-resolution model. Roughness enriches the complexity of the biofilm surface, and a model trained on biofilm formed by strains with high roughness yield a lower error on other strains.
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ItemCold elastic collisions of sodium and rubidium(Georgia Institute of Technology, 2009-07-01) Breuer, JohnIn this thesis we numerically compute the scattering lengths and bound states for sodium-rubidium collisions at low energy. This work was motivated by experiments which aim to produce Bose-Einstein condensates (BEC) mixtures of sodium-rubidium. Elastic collision properties are important for the rethermalization of the atoms during the evaporative cooling process. Inelastic processes, which we also discuss to some extent, cause trap losses in those experiments. In order to reach the required temperature and density the elastic collision rates should be sufficiently large compared to the inelastic rates. The scattering lengths, which completely specify the elastic collision parameters at low energy, determine the miscibility and phase diagram of the sodium-rubidium condensate mixture. We calculate the scattering lengths approximately and find agreement with previous calculations indicating that miscible phases of sodium and rubidium condensates do not appear to be feasible in the absence of external fields.
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ItemBallistic electron emission microscopy of magnetic thin films : simulations and techniques(Georgia Institute of Technology, 2001-05) Handorf, Thomas
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ItemDouble-valued statistics with a translation of I. Schur, "Über die Darstellung der symmetrischen und der alternierenden Gruppe durch gebrochene lineare Substitutionen" : Journal für die reine und angewandte Mathematik, band 139, Berlin 1911(Georgia Institute of Technology, 1999-05) Otto, Marc-Felix
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ItemBackscattering enhancement from plasmon polaritons on rough metal surfaces(Georgia Institute of Technology, 1997-12) West, Charles Stanley
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ItemStudy of lead zirconate titanate films grown by MOCVD(Georgia Institute of Technology, 1992-05) Braun, Wolfgang
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ItemInvestigation and characterization of a thermal infrared all-sky imager(Georgia Institute of Technology, 1991-12) Galyean, Christina Pilkey
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ItemAn investigation of spatially bounded, time independent quantum systems(Georgia Institute of Technology, 1991-05) Ilg, Matthias
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ItemControl of a Raman spectroscopy system with the Tandon PCX(Georgia Institute of Technology, 1990-12) Teal, Everette Mark
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ItemDynamical stability in Josephson junction arrays(Georgia Institute of Technology, 1990-08) Nichols, Steven