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- Electron transport (2)
- Entropy (2)
- Extrasolar planets (2)
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- Quantum scattering (2)
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- Superlattices as materials (2)
- Thin films (2)
- Al-based superlattice (1)
- Aluminum alloys (1)
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- Bayesian statistical decision theory (1)
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- Black holes (Astronomy) (1)
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- Carrier localization (1)
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- Characterization (1)
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- Copper alloys (1)
- Couplings (1)
- Deconvolution (1)
- Diagnostic imaging (1)
- Diffraction enhanced imaging (1)
- Displacement damage (1)
- Electric conductivity (1)
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- Exoplanet (1)
- Fourier transform optics (1)
Articles 1 - 12 of 12
Full-Text Articles in Physics
Estimation Of Planetary Photometric Emissions For Extremely Close-In Exoplanets, Jennifer L. Carter
Estimation Of Planetary Photometric Emissions For Extremely Close-In Exoplanets, Jennifer L. Carter
Legacy Theses & Dissertations (2009 - 2024)
The fine precision of photometric data available from missions like Kepler provide researchers with the ability to measure changes in light on the order of tens of parts per million (ppm). This level of precision allows researchers to measure the loss of light due to exoplanet transits as well as the light emitted by an exoplanet, or planetary photometric emissions. The planetary photometric emissions are due to the thermal emissions of the exoplanet, and reflected stellar light. In many cases it is assumed that the incident stellar light may be modeled as plane parallel rays. For extremely close-in exoplanets the …
Transits Of Non-Spherical Exoplanets, Bertrand Carado
Transits Of Non-Spherical Exoplanets, Bertrand Carado
Legacy Theses & Dissertations (2009 - 2024)
The recent years have shed light on amazing new worlds across the galaxy. It has been demonstrated that the Solar System is only one of many other systems. The Kepler Space Observatory, which was launched by NASA in 2009, has greatly contributed to expand knowledge of exoplanets whose characteristics (how massive they are, their size, orbital period, temperature...) vary on a surprisingly large scale. As an example, the least massive exoplanet known today has twice the mass of the moon [1]. The most massive exoplanet has 29 times the mass of Jupiter [2]. Orbital periods of known planets vary between …
Illumination Modulation For Improved Propagation-Based Phase Imaging, Tonmoy Chakraborty
Illumination Modulation For Improved Propagation-Based Phase Imaging, Tonmoy Chakraborty
Legacy Theses & Dissertations (2009 - 2024)
Propagation-based phase imaging enables the quantitative reconstruction of a light beam's phase from measurements of its intensity. Because the intensity depends on the time-averaged square of the field the relationship between intensity and phase is, in general, nonlinear. The transport of intensity equation (TIE), is a linear equation relating phase and propagated intensity that arises from restricting the propagation distance to be small. However, the TIE limits the spatial frequencies that can be reliably reconstructed to those below some cutoff, which limits the accuracy of reconstruction of fine features in phase. On the other hand, the low frequency components suffer …
The Entropic Dynamics Approach To The Paradigmatic Quantum Mechanical Phenomena, Susan Difranzo
The Entropic Dynamics Approach To The Paradigmatic Quantum Mechanical Phenomena, Susan Difranzo
Legacy Theses & Dissertations (2009 - 2024)
Standard Quantum Mechanics, although successful in terms of calculating and predicting
Radiation Effects In Tantalum Oxide-Based Resistive Memory Devices, Joshua Stuart Holt
Radiation Effects In Tantalum Oxide-Based Resistive Memory Devices, Joshua Stuart Holt
Legacy Theses & Dissertations (2009 - 2024)
There is an increasing need for radiation-hardened electronics as space programs grow in number and scope. Scientific interest in long-term exploration, particularly in high-radiation environments such as Europa, as well as commercial interest in establishing permanent outposts, requires high tolerance of radiation effects. A flash memory device might survive for several years in low Earth orbit, but only a few days in orbit around Europa due to the extremely high levels of radiation encountered there. Meanwhile, commercial interests, including asteroid mining and building a base on the moon or Mars would require electronic systems that could survive for long periods …
Mesh And Diffraction-Based X-Ray Phase Imaging, Congxiao He
Mesh And Diffraction-Based X-Ray Phase Imaging, Congxiao He
Legacy Theses & Dissertations (2009 - 2024)
More than a hundred years have passed since X-rays were detected by Wilhelm Rontgen. Due to their properties, they soon became widely applied in many areas, especially medical imaging. Recently, many new X-ray imaging techniques were designed, including phase imaging and diffraction enhanced imaging, DEI.
Effects Of Interface Scattering And Carrier Localization On Conductance Of Cu-Based Superlattices, Jiyoon Jessica Kim
Effects Of Interface Scattering And Carrier Localization On Conductance Of Cu-Based Superlattices, Jiyoon Jessica Kim
Legacy Theses & Dissertations (2009 - 2024)
Ultra-thin films and multilayer structures are widely used in modern technologies such as semiconductor logic and memory devices. As film thickness decreases to a few nanometers or smaller, classical transport theories are no longer valid. In this study, we investigate transport properties of superlattices with layer thickness reduced to ~1 nm. The superlattices are made of alternating layers of Cu and a transition metal (Ru, Mo, and Co). The layers are deposited by physical vapor deposition and resistance changes during superlattice growth are measured. The observed resistance evolution reveals the effects of carrier scattering and localization at the interfaces.
The N=1 Singlet Vertex Superalgebra Sm(1), Scott Richey Sidoli
The N=1 Singlet Vertex Superalgebra Sm(1), Scott Richey Sidoli
Legacy Theses & Dissertations (2009 - 2024)
In this work we study the vertex operator superalgebra known as the singlet vertex operator superalgebra, denoted $\overline{SM(1)}$. We are particularly interested in the number theoretic properties of the characters, and supercharacters, of irreducible modules of $\overline{SM(1)}$ as modules over the Neveu-Schwarz and Ramond Lie superalgebras, denoted $\mathfrak{ns}$ and $\mathfrak{R}$, respectively. These characters occur as modular-like forms, namely false and mock theta functions. The $S$- and $T$- transformations are computed and we demonstrate modular invariance of the vector space spanned by these characters and supercharacters. We use a continuous version of the Verlinde formula, introduced by Creutzig and Milas, to …
The Inferential Design Of Entropy And Its Application To Quantum Measurements, Kevin Vanslette
The Inferential Design Of Entropy And Its Application To Quantum Measurements, Kevin Vanslette
Legacy Theses & Dissertations (2009 - 2024)
This thesis synthesizes probability and entropic inference with Quantum Mechanics and quantum measurement [1-6]. It is shown that the standard and quantum relative entropies are tools \emph{designed} for the purpose of updating probability distributions and density matrices, respectively [1]. The derivation of the standard and quantum relative entropy are completed in tandem following the same inferential principles and design criteria. This provides the first design derivation of the quantum relative entropy while also reducing the number of required design criteria to two.
Carrier Scattering And Localization In Nm-Thick Al/Ru, Al/Co And Al/Mo Superlattices, Yanli Zhang
Carrier Scattering And Localization In Nm-Thick Al/Ru, Al/Co And Al/Mo Superlattices, Yanli Zhang
Legacy Theses & Dissertations (2009 - 2024)
Thin films and superlattices are widely used in modern technologies. Certain metal superlattices with layer thickness between 1 to 10 nm have interesting magneto transport properties and unique applications in spintronics and data storage. We have studied electrical conductance of Al/Ru, Al/Co, and Al/Mo superlattices with layer thickness between 1 to 2 nm. By monitoring the resistance change during the growth of the superlattice, we are able to observe directly the effects of carrier localization and scattering when a highly disordered interface is being deposited.
Photonic Grating Coupler Designs For Optical Benching, Eng Wen Ong
Photonic Grating Coupler Designs For Optical Benching, Eng Wen Ong
Legacy Theses & Dissertations (2009 - 2024)
Background: Silicon Photonics has been rapidly developing as a field. The primary reason for this is its lower operating costs and faster switching rates for use in big data centres. Instead of microns-wide copper lines to transmit signals, silicon photonic chips use waveguides, usually of silicon or silicon nitride. Photonic signals bypass the issues of resistive-capacitance lag (RC-lag) and resistive-heating encountered by copper lines. Additionally, a single waveguide may transmit multiple signals along different carrier wavelengths.
Black Hole Microstates & Integrable Deformation In String Theory, Jia Tian
Black Hole Microstates & Integrable Deformation In String Theory, Jia Tian
Legacy Theses & Dissertations (2009 - 2024)
In this thesis, we study microstate geometries of black holes in string theory and explore several aspects of integrabile Conformal Field Theories (CFTs).