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Wave Propagation Inside Random Media, Xiaojun Cheng 2017 The Graduate Center, City University of New York

Wave Propagation Inside Random Media, Xiaojun Cheng

All Graduate Works by Year: Dissertations, Theses, and Capstone Projects

This thesis presents results of studies of wave scattering within and transmission through random and periodic systems. The main focus is on energy profiles inside quasi-1D and 1D random media.

The connection between transport and the states of the medium is manifested in the equivalence of the dimensionless conductance, g, and the Thouless number which is the ratio of the average linewidth and spacing of energy levels. This equivalence and theories regarding the energy profiles inside random media are based on the assumption that LDOS is uniform throughout the samples. We have conducted microwave measurements of the longitudinal energy profiles ...


Quantum Optical Interferometry And Quantum State Engineering, Richard J. Birrittella Jr 2017 The Graduate Center, City University of New York

Quantum Optical Interferometry And Quantum State Engineering, Richard J. Birrittella Jr

All Graduate Works by Year: Dissertations, Theses, and Capstone Projects

We highlight some of our research done in the fields of quantum optical interferometry and quantum state engineering. We discuss the body of work for which our research is predicated, as well as discuss some of the fundamental tenants of the theory of phase estimation. We do this in the context of quantum optical interferometry where our primary interest lies in the calculation of the quantum Fisher information as it has been shown that the minimum phase uncertainty obtained, the quantum Cramer-Rao bound, is saturated by parity-based detection methods. We go on to show that the phase uncertainty one obtains ...


Relaxation Of Microwave Nonlinearity In A Cuprate Superconducting Resonator, Richard A. Huizen, Sean L. Hamilton, Geoffrey T. Lenters, Stephen K. Remillard 2017 Grand Valley State University

Relaxation Of Microwave Nonlinearity In A Cuprate Superconducting Resonator, Richard A. Huizen, Sean L. Hamilton, Geoffrey T. Lenters, Stephen K. Remillard

Faculty Publications

The second- and third-order nonlinear microwave response of a superconducting YBa2Cu3O7 thin-film resonator was synchronously measured using three input tones. This technique permits the local measurement, and hence mapping, of intermodulation distortion inside the resonator. Second- and third-order IMD measured with a fixed probe relaxed in remarkably different ways after the removal of a static magnetic field. The second-order IMD relaxed by two different magnetic processes, a fast process that appears related to bulk remanent magnetization and a slow process that fits the description of Bean and Livingston. The third-order IMD relaxes by only one process that is distinct from ...


A Simple Electric Field Probe In A Gauss's Law Laboratory, Daniel O. Ludwigsen, Gregory N. Hassold 2017 Kettering University

A Simple Electric Field Probe In A Gauss's Law Laboratory, Daniel O. Ludwigsen, Gregory N. Hassold

Gregory Hassold

Early in our calculus-based introductory course, students are introduced to electric fields and sometimes struggle with the abstraction of a vector field. They have less familiarity with the phenomena associated with electric fields, and the connection between phenomena and mathematical formalism is weaker. Our very next topic is Gauss's law.


A Period Examination Through Contemporary Energy Analysis Of Kevin Roche’S Fine Arts Center At University Of Massachusetts-Amherst, L Carl Fiocchi Jr 2017 University of Massachusetts - Amherst

A Period Examination Through Contemporary Energy Analysis Of Kevin Roche’S Fine Arts Center At University Of Massachusetts-Amherst, L Carl Fiocchi Jr

L. Carl Fiocchi

Studies of buildings belonging to a subset of Modernist architecture, Brutalism, have included discussions pertaining to social and architectural history, critical reception, tectonic form and geometry inspirations, material property selections, period technology limitations, and migration of public perceptions. Evaluations of Brutalist buildings’ energy related performances have been restricted to anecdotal observations with particular focus on the building type’s poor thermal performance, a result of the preferred construction method, i.e. monolithic reinforced concrete used as structure, interior finish and exterior finish. A valid criticism, but one that served to dismiss discussion that the possibility of other positive design strategies ...


Gravitational Wave Behavior At A Vacuum-Matter Interface, Jake Litterer 2017 University of Puget Sound

Gravitational Wave Behavior At A Vacuum-Matter Interface, Jake Litterer

Honors Program Theses

In classical electrodynamics, boundary conditions of the E and B fields are derived from Maxwell's equations, which are used to derive the Fresnel equations describing the behavior of a wave at an interface between media with given indices of refraction. Though electrodynamics and gravity are in some instances strikingly analogous, boundary conditions in general relativity are somewhat more opaque. We will see that while while continuity of the metric must be true in general, discontinuity of the extrinsic curvature of spacetime, while allowed by the Einstein field equations, results in a singularity in the energy-momentum tensor. This singularity is ...


Searching For The Origins Of Matter, Joshua L. Barrow 2017 The Univeristy of Tennessee

Searching For The Origins Of Matter, Joshua L. Barrow

Andrews Research Conference

The big bang and inflation are experimentally confirmed by multitudes of astronomical observations, yet theoretical tension still exists upon a very important question: why is there something rather than nothing? In other words, why are there unequal amounts of matter and antimatter? Why did a supposedly initially symmetric state not annihilate perfectly?

The breaking of this symmetry has allowed for all of material existence--also known as baryogenesis, the prevalence of matter over antimatter--and yields the theoretical possibility of direct detection by observation of baryon number violating mechanisms, which have previously never been observed.

One such plausible mechanism can be found ...


Optimization Of Cardiac Pacing Stimulation By Current Configuration –A Theoretical, Numerical And Experimental Study., Flavio H. Fenton, Hila Dvir, Neil Hardy 2017 Georgia Institute of Technology

Optimization Of Cardiac Pacing Stimulation By Current Configuration –A Theoretical, Numerical And Experimental Study., Flavio H. Fenton, Hila Dvir, Neil Hardy

Biology and Medicine Through Mathematics Conference

No abstract provided.


The Use Of Plenoptic Cameras In Astronomy, James R. Hamilton 2017 Utah State University

The Use Of Plenoptic Cameras In Astronomy, James R. Hamilton

Physics Capstone Project

Since light-field imaging cameras are starting to become more in the world today, the question that arises is, “Could these cameras help advance the science when they are used in conjunction with telescopes and microscopes?” With their use in microscopy having been partially settled and no information about their use with telescopes, this experiment was setup to start the ascertainment of the use of light-field imaging cameras with telescopes. With the use of an older plenoptic camera, it was ascertained that a new light-field imaging camera might compare with the conventional digital camera of today.


Microcontroller Survivability In Space Conditions, Windy Olsen 2017 Utah State University

Microcontroller Survivability In Space Conditions, Windy Olsen

Physics Capstone Project

The Utah State University (USU) Materials Physics Group (MPG) is interested in the performance of Commercial Off the Shelf (COTS) microcontrollers in space conditions. Microcontrollers are commonly used on CubeSats, small relatively inexpensive satellites that are flown in Low Earth Orbit (LEO) at altitudes of ~160 km-2000 km. There is a large area of interest in COTS microcontrollers because they provide a more cost-effective on-board computer for CubeSats. This experiment focused on the functionality of an ATmega328 microcontroller on an Arduino Uno board inside the MPG’s Space Survivability Test (SST) Chamber. A diagnostic program was used to try to ...


Uv Degradation Of Polycarbonate, Katie Gamaunt 2017 Utah State University

Uv Degradation Of Polycarbonate, Katie Gamaunt

Physics Capstone Project

The decrease in visible and ultraviolet transmission spectra of polymeric and glass spacecraft materials has been measured to determine the extent of degradation due to high-energy UV radiation similar to the solar spectrum (both above and below the stratosphere, which is where most of the UV radiation is absorbed). This project looked at the effects that the atmosphere has in regards to blocking UV radiation and thus, slowing down the UV degradation process. A polycarbonate sample was exposed to radiation from a focused high intensity deuterium lamp source, which generates radiation in the UVA and UVB spectrum. A particularly severe ...


Rayleigh-Lidar Observations Of Mesospheric Densities, Lucas R. Priskos, Brandon S. Hustead, Jonathon L. Price, Joshua P. Herron 2017 Utah State University

Rayleigh-Lidar Observations Of Mesospheric Densities, Lucas R. Priskos, Brandon S. Hustead, Jonathon L. Price, Joshua P. Herron

Physics Capstone Project

The goal of this project is to take relative densities of the mesosphere (altitude 45-90 km) from data that has been collected and convert them into absolute densities. It is then possible to look at how these densities vary with altitude and season. The data was collected using a Rayleigh-scatter LIDAR at the Atmospheric LIDAR Observatory. This is a part of the Center for Atmospheric and Space Sciences and is located on the Utah State University Campus. It spans a total of 11 years beginning in 1993 and ending in 2004. The collected data is used to create a composite ...


Investigating The Weddell Sea Anomaly Using Tie-Gcm, DaeSean K. Jones 2017 Utah State University

Investigating The Weddell Sea Anomaly Using Tie-Gcm, Daesean K. Jones

Physics Capstone Project

The ionosphere is a region of Earth’s upper atmosphere that is embedded in the thermosphere and parts of the exosphere and mesosphere. The ionosphere is a layer of electrons and electrically charged atoms and molecules that are created by atmospheric absorption of solar radiation. It is subdivided into many layers but for this report, only the F-layer will be of interest. In the F-layer, extreme ultraviolet (EUV) solar radiation ionizes atomic oxygen and in this layer, an intriguing feature occurs. This feature involves an anomalous evening phenomenon over a fixed geographic location, where the electron density during the nighttime ...


Rayleigh-Lidar Observations Of Mid-Latitude Mesospheric Densities, Brandon S. Hustead, Lucas R. Priskos, Jonathan L. Price, Joshua P. Herron 2017 Utah State University

Rayleigh-Lidar Observations Of Mid-Latitude Mesospheric Densities, Brandon S. Hustead, Lucas R. Priskos, Jonathan L. Price, Joshua P. Herron

Physics Capstone Project

This research is an analysis of absolute densities throughout the mesosphere (45 km to 90 km). Although much research has gone into the study of temperatures and their variations occurring in our atmosphere, little has been done to research the densities and their variations. Due to the remoteness of the middle atmosphere there is a high degree of difficulty in making observations in the mesosphere. There are currently three major types of ground-based instruments used to sense the mesosphere remotely. They are atmospheric radars, LIDARs and optical spectrometers. As far as measuring density in the mesosphere LIDAR is the most ...


Tilt Classifications In Perfect Fluid Cosmology, Bryant Ward 2017 Utah State University

Tilt Classifications In Perfect Fluid Cosmology, Bryant Ward

Physics Capstone Project

We classify all known perfect fluid cosmological solutions of the Einstein equations according to whether they are tilted or non-tilted. A non-tilted universe will have observers who see a homogeneous, isotropic universe with matter at rest with respect to them. A tilted universe will have observers who see matter moving relative to them. These classifications are useful when considering fluid models of the universe in that the Hubble parameter and expansion are observer dependent and can be different in a tilted versus a non-tilted universe. This gives more insight when fitting these models with observations of our real universe. We ...


Arduino And Raspberry Pi In A Laboratory Setting, Dustin Johnston 2017 Utah State University

Arduino And Raspberry Pi In A Laboratory Setting, Dustin Johnston

Physics Capstone Project

The purpose of this research project was to study the use of Arduino and Raspberry Pi’s and investigate the practicality of integrating them into the intermediate and advance laboratory classes. After purchasing diverse types of sensors to use with Arduino and Raspberry Pi, the sensors were then performance tested. The types of sensors that were characterized were an accelerometer, altimeter, barometric pressure, gyroscopic, humidity, magnetic, temperature, and vibrational sensors. Using this analysis, the existing labs can be upgraded and their manuals can be updated and improved to use these sensors where appropriate. This will allow students to learn valuable ...


Growing Bores At The South Pole, Mikaela Ashcroft 2017 Utah State University

Growing Bores At The South Pole, Mikaela Ashcroft

Physics Capstone Project

Bores in the South Pole have been monitored for over ten years, and, until the year 2012, they were found to be relatively rare. Bores start with relatively large intensity and develop additional waves behind them depending on their movement and stability. The data from the South Pole was gathered from the US Admundsen-Scott South Pole station. A photo was taken every 30 seconds from the months of April to August with a wide-angled lens. The data was then processed and analyzed in multiple programs to determine wavelength, duration of event, relative velocity over time, and direction of propagation. Studies ...


Wormholes: Gates To The Stars?, Samuel Shreeve 2017 Utah State University

Wormholes: Gates To The Stars?, Samuel Shreeve

Physics Capstone Project

One of the most consistently fascinating results of Albert Einstein’s theory of general relativity is the prediction of wormholes – astronomical objects which are, among other things, capable of serving as a connection between two distant regions of space. The simplest class of wormholes are Schwarzschild wormholes – wormholes that behave as non-rotating, non-charged black holes, except that the event horizon serves as a connection to another wormhole elsewhere, instead of a point of no return.

This research presentation analyzes the attributes that make a Schwarzschild wormhole unsuitable for human travel, and examines the conditions that would have to hold for ...


Magneto-Optical Properties Of Iron Oxide Nanoparticles For Use In Medical Imaging, Kathleen B. Oolman 2017 University of Wyoming

Magneto-Optical Properties Of Iron Oxide Nanoparticles For Use In Medical Imaging, Kathleen B. Oolman

Honors Theses AY 16/17

Due to their non-toxic and magnetic nature, magnetite iron oxide (Fe3O4) nanoparticles have potential uses in biomedical applications such as for magnetic resonance (MR) contrast agents. In this work, the physical properties of rare-earth element doped (Tb and Eu) and undoped iron oxide nanoparticles are optically investigated. Absorption and photoluminescence (PL) from doped and undoped iron oxide nanoparticles in solution show a well-defined excitonic absorption and weak PL. When the nanoparticles are drop cast into thin films, the absorption spectra remains unchanged while the PL disappear, suggesting the thin film creates non-radiative relaxation pathways. Low-temperature absorption measurements ...


Physical Principles Governing Colloidal Particle Deposition At Low Reynold’S Number: Applications To Microbial Biofilms, Sophia Wiedmann 2017 Macalester College

Physical Principles Governing Colloidal Particle Deposition At Low Reynold’S Number: Applications To Microbial Biofilms, Sophia Wiedmann

Macalester Journal of Physics and Astronomy

Biofilms formed from the adhesion of microbes to a surface hold great relevance to public health and wastewater management. However, the physical principles underlying the attachment stage of biofilm formation, when individual microbes first come into contact with a substrate, are not well understood. Here I report on a model of colloidal particle attachment to a surface that incorporates the effects of diffusion, advection, gravity, and the hydrodynamic lift and drag forces experienced by polystyrene beads at low Reynold’s number. The simulation predicts attachment rates of 1.04x10^(-8)m/s, 0.73x10^(-8)m/s, and 1.29x10 ...


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