Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 185 for “"Other Physics"”.
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The Daya Bay Reactor Neutrino Experiment
… neutrino and electron anti-neutrino spectrum. Other physics analysis and impact to future experiments are also discussed.
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Nonlinear acceleration methods for even-parity neutron transport
… a natural avenue for an implicitly coupled multiphysics code. An investigation was performed into the acceleration properties of the introduction of a nonlinear quasi-diffusion-like tensor in linear and nonlinear solution schemes. Although poor numerical properties prohibit the direct matrix …
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Dihadron Fragmentation Functions In Proton-Proton Collisions At The Relativistic Heavy Ion Collider (rhic)
<p>Measurements of azimuthal correlations at the Relativistic Heavy Ion Collider (RHIC) have shown an away-side that is suppressed in Au+Au collisions compared to proton+proton/Deuteron+proton collisions. Such suppression is taken as a signature of the predicted QCD dense medium. However, the …
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Measurement of the muon anti-neutrino charged current double differential cross section with no pions in the final state on water using the pi-zero detector at T2K
… in the T2K beamline en route to Super-K, other physics analyses are performed at ND280. This thesis describes one such measurement where the π0-detector (P∅D) and a time projection chamber at ND280 were used to measure the charged-current cross section for muon anti neutrinos with water as …
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Constraining the Neutrino Flux for Oscillation Measurements at MicroBooNE and DUNE
Neutrino physics requires a myriad of different complex aspects which need to come together precisely in order for accurate measurements to be accomplished in this meticulously detailed field. Some experiments are known best for one key measurement despite other physics also taking place, such as …
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Earthshine : Photometry, modeling, and spectral observations
The Earthshine group has been making sustained observations of the Earthshine from Big Bear Solar Observatory in California since late 1998. There have also been intermittent observations from 1994-5. High and low resolution Earthshine spectral observations have also been under taken at Palomar …
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Experimental and phenomenological study of persistent photoconductivity in YBa2Cu3O6 thin films
… unusual effect, both our results and those of others. The cellular automata model may have application to other unusual optical phenomena exhibited by YBa_2Cu_3O_{6+x} such as resonant Raman scattering.
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Extending The Lifetime of Optically Stimulated Dosimeters For Use In Output Checks At Iroc- Houston
… The sensitivity of each OSLD relative to each other, ks,i did not change up to 50 Gy showing that the sensitivity change amongst all the OSLDs was applied universally amongst the group. There is a well characterized change in the slope of the linearity correction factor as accumulated history …
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An analysis of changes in the magnetic field of active region 9415 after the 2001 April 6 Solar Flare
The objective of this study was to further the current understanding of the correlation between solar flares and magnetic flux change. The average gradient of the magnetic flux around the neutral line of Active Region 9415 and the locations of the magnetic flux centers-of-mass in both polarities in …
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Feasibility of superconductivity in semiconductor superlatices
… to test the existence of superconductivity, the physics of sensor arrays and their ability to create synthetic images of semiconductor structures, is explored. Approximations are considered and practical applications in detecting superconductivity in superlattices are evaluated.
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Understanding the origin of the recovery of superconductivity in halogenated YBCO single crystal : atomic structure study
The recovery of superconductivity in underdoped YBa_2Cu_3O_{6+y} (YBCO) by exposure to bromine, iodine, chlorine and fluorine is a long-standing problem which has not been clearly resolved. The key question concerns the role of these halogens in the lattice. In order to shed light to this problem, …
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Mems approaches in infrared imaging
The design and performance simulation of a novel Microelectromechanical System (MEMS) based infrared detector, that utilizes coefficient of thermal expansion, is discussed. The detector design uses a variety of thermal expansion coefficient materials, including alloys which are connected to ambient …
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A comprehensive study of evolution of photospheric magnetic field and flows associated with solar eruptions
The rapid, irreversible change of the photospheric magnetic field has been recognized as an important element of the solar flare process. Recent theoretical work has shown that such a change would imply Lorentz force perturbations acting on both the outer solar atmosphere and the solar surface. …
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New facet of solar activities revealed by high-resolution imaging at he i 10830 Å
… the major data source for this dissertation. Another major reason why the basic processes are hard to be understood is that most of previous observations did not provide information of the solar interface region, which is essential for understanding how the convective motions and flows in the …
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Photonic Crystals with Alternate Arrays of Rods and Holes in a Low Dielectric-Index Material
<p>This thesis theoretically deals with the propagation of electromagnetic waves (light beams) in periodically modulated dielectric material structures based on Maxwell’s equations. We are interested in novel light propagation characteristics in these man-made dielectric material structures for …
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Density Functional Theory Study of Two-Dimensional Boron Nitride Films
<p>Since graphene was isolated in 2004, the number of two-dimensional (2D) materials and their scientific relevance have grown exponentially. Besides graphene, one of the most important and technolocially promizing 2D materials that has emerged in recent years is hexagonal boron nitride, in its …
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Innovative Acoustic Reflection Imaging Techniques And Application To Clinical Breast Tomography
… the planar Kirchhoff migration method used in geophysics, and combined it with sound speed and attenuation data obtained from the transmission signals to create reflection ultrasound images that are corrected for refractive and attenuative effects. </p> <p>The resulting techniques were applied to …
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Improving The Accuracy of Radiation Pneumonitis Dose Response Models
<p>The prognosis for lung cancer patients remains poor. Five year survival rates have been reported to be 15%. Studies have shown that dose escalation to the tumor can lead to better local control and subsequently better overall survival. However, dose to lung tumor is limited by normal tissue …
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Construction of FASR subsystem testbed and application for solar burst trajectories and RFI study
The construction of the Frequency Agile Solar Radiotelescope (FASR) Subsystem Testbed (FST) and observational results are described. Three antennas of Owens Valley Solar Array (OVSA) have been upgraded with newly designed, state of art technology. The 1-9 GHz RF signal from the antenna feed is …
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Synthesis and characterization of plasma enhanced chemically vapor deposited tantalum films
A low temperature inorganic plasma-enhanced chemical vapor deposition (PECVD) process has been developed for the growth of Ta using tantalum pentachloride (TaC15) as the preferred precursor and hydrogen as the reactant gas. Ta coatings were deposited at substrate temperature of 370-400 C, reactor …
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