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Browsing Theses (Physics and Astronomy) by Submit Date
Now showing items 21-40 of 346
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(2008-04-10)
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Benchmarking a new three-dimensional ultrasound system for prostate image guided radiation therapy (2008-04-23)Image guided radiation therapy (IGRT) is a new type of radiotherapy used to deliver lethal doses of radiation to mobile tumors, while preventing surrounding healthy structures from receiving high doses of radiation. It ...
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(2008-07-23)Raman microscopy (RM) is a vibrational spectroscopic technique capable of obtaining sensitive measurements of molecular composition, structure, and dynamics from a very small sample volume (~1 µm). In this work, a RM system ...
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Distinguishing Modified Newtonian Dynamics from dark matter with galaxy-galaxy lensing measurements (2008-07-30)As an alternative to dark matter, Modified Newtonian Dynamics (MOND) can explain dynamical measurements of galaxies on small scales. It is, however, unclear whether MOND still works for galaxies on the large scale. In ...
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(2008-08-14)Chiral perturbation theory is a useful tool in the study of low energy reactions involving light particles. However the inclusion of heavy particles in chiral perturbation theory results in large contributions from loop ...
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(2008-08-15)The diffuse interstellar bands (DIBs) probably arise from complex organic molecules whose strength in local galaxies correlates with neutral hydrogen column density, N(H I), and dust reddening, E(B−V). Because Damped Lyman-α ...
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(2008-09-11)Polymer gel dosimetry, in conjunction with x-ray computed tomography (x-ray CT) imaging, is a three-dimensional dosimetric tool that shows promise in the verification of complex radiation therapy treatments. Previous ...
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(2008-10-16)We use a global fit to determine the form factor slopes and branching fractions of the decays B --> Dlnu and B --> D*lnu. We reconstruct Dl pairs and construct a 3-dimensional distribution binned in lepton momentum, D ...
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(2008-10-29)This thesis outlines the prospects for top quark mass measurement through the Fully Hadronic decay of top-antitop events with the ATLAS detector. Methods with and without b-tagging were explored. Without b-tagging the ...
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(2008-11-19)The principal observational contribution of this thesis is an innovative technique, using spatially resolved spectroscopy of highly magnified, gravitationally lensed galaxies, to study their internal structure and kinematics ...
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(2008-11-25)Co-located measurements of acoustic backscatter and temperature/velocity microstructure are used to confirm theoretical predictions of sound scatter from oceanic turbulence. The data were collected with a torpedo-shaped ...
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(2008-12-05)The Standard Model of Particle Physics has been verified to unprecedented precision in the last few decades. However there are still phenomena in nature which cannot be explained, and as such new theories will be required. ...
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(2008-12-19)I examine the observational effects of a light scalar field with a scalar coupling to masses and a pseudoscalar coupling to light and particle spins. The pseudoscalar coupling to light induces a coupling to atomic spins ...
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(2008-12-30)Using data collected with the BABAR detector at the SLAC PEP-II electron-positron storage ring operating at a centre-of-mass energy near 10.58 GeV, the branching fractions $B(\tau^- \to \pi^-\pi^-\pi^+\nu_\tau) ...
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(2009-01-04)We study the structure and substructure of Lambda-CDM halos using a suite of high-resolution cosmological N-body simulations. Our analysis of the substructure population of dark matter halos focuses on their mass and peak ...
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(2009-01-07)We present the first determination of the radial velocities and metallicities of 78 red giant stars in the isolated dwarf irregular galaxy WLM. Observations of the calcium II triplet in these stars were made with ...
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(2009-03-27)High resolution spectra have been analyzed for two and three stars respectively in the candidate extragalactic globular clusters, NGC 5024 and NGC 5466, with the High-Resolution Spectrograph on the 9.2 m Hobby-Eberly ...
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(2009-06-02)Read-out channels in the liquid argon (LAr) calorimeter of the ATLAS detector are susceptible to various kinds of faults, which can impair the selection of events made by the trigger system. General-purpose software tools ...
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(2009-08-24)A search is done on the entire BaBar data set for the neutrino-less tau decay tau->e gamma. No evidence for the decay is found and a 90% confidence level upper limit is determined to be 3.3 * 10^(-8) including systematic ...
Now showing items 21-40 of 346
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