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Full-Text Articles in Physical Sciences and Mathematics
Environmental Analysis And White Cell Applications Ftir Spectroscopy, Maria Gabriela Oliveros
Environmental Analysis And White Cell Applications Ftir Spectroscopy, Maria Gabriela Oliveros
Masters Theses
The research is concerned with atmospheric chemistry & physics, and analyzing the environment with respect to the quantity of molecules is in the air we breathe. Fourier Transform Infrared Spectroscopy is used to identify the IR active molecules in our atmosphere. FTIR Spectrometer determines the intensity loss for molecules that have absorbed IR light. The FTIR spectroscopy is performed using the light from the sun or a carbon rod light source in the lab. A Sun-tracking device was employed to direct the sunlight into the spectrometer. Open-path measurements were made using multiple mirror reflections of the carbon rod light source …
Experimental Determination Of Emissivity And Resistivity Of Yttria Stabilized Zirconia At High Temperatures, Howard Mosley Frederick
Experimental Determination Of Emissivity And Resistivity Of Yttria Stabilized Zirconia At High Temperatures, Howard Mosley Frederick
Masters Theses
The emissivity and resistivity of yttria stabilized zirconia (YsZ), Y2O3-ZrO2, a ceramic material that has been specially fabricated for use as an electrically powered high temperature air heater are determined for temperatures above 2000 K. Published results of measurements of emissivity and resistivity of yttria, zirconia, and their alloys at temperatures above 2000 K are rare in the technical literature. A survey of literature describing the properties of YsZ, particularly literature concerning the ionic conduction process at high temperatures, is assembled to provide a theoretical basis for the formulation of a temperature and resistivity …
Simulation Of Single Molecule Trapping In A Nanochannel, William Neil Robinson
Simulation Of Single Molecule Trapping In A Nanochannel, William Neil Robinson
Masters Theses
Trapping of single fluorescent molecules in solution is numerically simulated. Optical trapping provides insufficient force for trapping molecules much smaller than the optical wavelength. Instead, a means for trapping by sensing the molecule position and applying real-time feedback of flow to compensate diffusional displacement is used. The solution is contained in a nanochannel, reducing the problem to one spatial dimension. The position of the molecule is estimated from the fluorescence signals generated by two focused laser beams, which originate from a single laser source that is split and temporally alternated between the two focal spots. Photon collection is time gated, …
Fusion Reaction Cross-Section Measurements Near 100Sn, Elton Lewis Freeman
Fusion Reaction Cross-Section Measurements Near 100Sn, Elton Lewis Freeman
Masters Theses
This thesis describes the measurement of production rates of A=109 isobars produced with beams of 54Fe ions accelerated to 207 MeV bombarding 58Ni target. The reaction products have been electromagnetically separated according to their mass over charge ratio and implanted into a semiconductor detector. The spontaneous decay radiation from the implanted radioactive isobars has been measured in a detection system with known detection efficiency, enabling to determine absolute intensities of observed isotopes. Known branching ratios of alpha decays of 109Xe, 109Te, proton decay of 109I and beta delayed gamma radiation of 109Te and 109 …
The Physics Of Electron Degenerate Matter In White Dwarf Stars, Subramanian Vilayur Ganapathy
The Physics Of Electron Degenerate Matter In White Dwarf Stars, Subramanian Vilayur Ganapathy
Masters Theses
White dwarfs are the remnant cores of medium and low mass stars with initial mass less than 8 times the mass of our sun. As the aging giant star expels its surface layers as planetary nebulae, the core is exposed as a white dwarf progenitor. The density of matter in white dwarfs is so high that thermal or radiation pressure no longer supports the star against the relentless pull of gravity. The white dwarf is supported by a new kind of pressure known as the degeneracy pressure, which is forced on the electrons by the laws of quantum mechanics. The …
Observation Of Analyte-Induced Deflections For Uncoated Microcantilevers Using The Focused Ion Beam Procedure, Jacques S. Stacco
Observation Of Analyte-Induced Deflections For Uncoated Microcantilevers Using The Focused Ion Beam Procedure, Jacques S. Stacco
Masters Theses
It has been found that structural modifications, involving the creation of submicron scale grooves on uncoated silicon nitride microcantilevers, allow microcantilevers to display analyte-induced deflections which have not been previously observed. The submicron grooves were created through the use of a focused ion beam procedure to mill deep and narrow grooves without the subsequent deposition of a chemically reactive coating. These modifications significantly increase (by approximately 400%) an uncoated microcantilever’s ability detect analytes such as water vapor, ethyl alcohol, acetone vapor, argon, and 1-mononitrotoluene. The intention of the experiment was to achieve greater microcantilever deflections by increasing an uncoated microcantilever’s …
Modeling The Ground State Baryon Octet Using A Generalization Of The Lagrange Triangle Solution, Matthew P. Duran
Modeling The Ground State Baryon Octet Using A Generalization Of The Lagrange Triangle Solution, Matthew P. Duran
Masters Theses
The baryon octet is modeled using relativistic and nonrelativistic Hamiltonians with interquark confining potentials. Using the works of Crater, a nonrelativistic three-body Hamiltonian is obtained where the corresponding eigenvalue equation will be shown to be separable and can be treated as three two-body like systems. Next, using relativistic constraint dynamics, our eigenvalue equation is treated relativistically following the works of Sazdjian and Yang. Using the free-mass-shell Hamiltonian constraints, Yang gives us an effective energy and reduced mass of relative motion for two particle systems which we expand to a three body case. With the help of work done by Sazdjian, …
Optimization Of Cosmological Simulations With Artificial Intelligence, Jay Billings
Optimization Of Cosmological Simulations With Artificial Intelligence, Jay Billings
Masters Theses
Galaxy collisions are an important part of the large-scale structure of the Universe and an important catalyst for intragalactic processes like star formation. Therefore, realistic models of these interactions are an important part of any theory that plans to accurately describe the evolutionary processes of the Universe and, given the size of the problem, efficient computation and data analysis are key. This dissertation presents a proof-of-concept that an artificial intelligence suite, nominally composed of a genetic algorithm and neural network, can optimize the search of the galaxy collision parameter space. Furthermore, this dissertation discusses the possibility that this method can …