Browsing Physics by Title
Now showing items 98-117 of 291
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Gas Adsorption on Suspended Carbon Nanotubes and Graphene
Rare gas adsorption was studied on suspended individual single walled carbon nanotubes and graphene. The devices were fabricated as field effect transistors. Adsorption on graphene was studied through two-terminal ... -
Getting the most out of nanopores
Over the past three decades, the fields of biophysics and biotechnology have seen an era of unprecedented growth, bolstered by the development of new experimental techniques. Prominent within these techniques are ... -
Greedy algorithms for physics-informed sparse sensor selection
In this era of big data, many systems of interest to researchers are too large to fully sample. Thus, significant downsampling is necessary, but determining the best locations for optimal full-state reconstructions is an ... -
Harnessing cell-to-cell variations to probe bacterial structure and biophysics
Advances in microscopy and biotechnology have given us novel insights into cellular biology and physics. While bacteria were long considered to be relatively unstructured, the development of fluorescence microscopy techniques, ... -
Heteronuclear Feshbach Resonances in Ultracold Mixtures of Ytterbium and Lithium
This thesis reports on experimental observation of heteronuclear Feshbach resonances between ultracold alkaline-earth-like Yb and alkali Li atoms, revealing methods for experimental control of heteronuclear scattering ... -
Hidden Sector: Three Different Ways
(2013-11-14)This thesis is a compilation of three projects that explore the consequences of different Hidden Sector models in various experimental fields. The first project proposes the Hidden Sector is populated by just one U(1) ... -
High Resolution Single-Molecule Enzyme Dynamics Using Nanopores
DNA is a molecule that contains the genetic information of all living organisms. DNA provides the instructions that the cell uses to construct the proteins which carry out the complex functions required for life to thrive. ... -
High-resolution spectroscopy in p115sInp+s and prospects for an indium ion optical frequency reference
(2007)The indium ion is among the candidates for optical frequency references because of the comparative simplicity of its laser cooling and trapping, the high quality factor (Q =1.5 x 1015) of its clock transition, and the ... -
Holographic Tools for Probing the Dynamics of Strongly Coupled Field Theories
Since it was conjectured almost 20 years ago, AdS/CFT duality, or holography, has enabled steady progress in understanding certain gauge theories in the strongly coupled limit. In this thesis we examine various aspects of ... -
Hubbard Model Approach to X-ray Spectroscopy
(2013-02-25)We have implemented a Hubbard model based first-principles approach for real-space calculations of x-ray spectroscopy, which allows one to study excited state electronic structure of correlated systems. Theoretical ... -
Identifying and addressing student difficulties with electrostatics and magnetostatics in introductory and advanced courses
This dissertation describes an investigation of student conceptual understanding of statics concepts in E&M, at the introductory and junior level. At the introductory level, this research led to the development of three ... -
Identifying and Addressing Student Difficulties with the Source-Field Relationship using Tutorials in Upper-Division Electromagnetism
This dissertation describes an investigation of student conceptual understanding of the source-field relationship in upper-division electromagnetism. The three core aspects of the source-field relationship discussed in ... -
An improved low-temperature RF-cavity search for dark-matter axions
Axions are hypothetical elementary particles that may help provide the answer as to why QCD preserves the discrete symmetries P and CP. Light axions also have properties that make them ideal dark-matter candidates. The ... -
Improving 21-cm Epoch of Reionization Power Spectrum Limits by Characterizing and Mitigating Radio Frequency Interference
The Epoch of Reionization (EoR) is the period in which the universe's hydrogen transformed from being predominantly neutral to being predominantly ionized. An extremely promising way to explore the EoR is by making use of ... -
Improving Axion Signal Models Through N-Body Simulations
The QCD axion is a well-motivated candidate for solving both the strong CP and dark matter problems. A great deal would be revealed about physics both on the level of fundamental particles and astronomy if the axion were ... -
Improving instruction in mechanics through indentification and elicitation of pivotal cases in student reasoning
(2005)This dissertation reports efforts to develop instructional materials on linear momentum, angular momentum, and forces on rigid bodies in standard introductory physics course. Many common errors in understanding of physics ... -
Improving the Accuracy and Application of Nanopore DNA Sequencing
DNA contains the code of life, forming the molecular basis for all of life's diversity. The past several decades have witnessed remarkable progress in our ability to read and understand life's code through DNA sequencing. ... -
Increasing Access and Capabilities of CubeSats for Investigation of Earth Trojan Asteroids
This thesis develops the requirements of a low-cost spacecraft mission to the Sun-Earth Lagrange point L4 and L5 to search for Earth Trojan asteroids, and develops and demonstrates a specialized communication system needed ... -
Information Content and Analysis of X-ray Absorption Spectroscopy and X-ray Emission Spectroscopy Using Machine Learning
Data science and machine learning (ML) methods are revolutionizing scientific analysis and data processing. As a case in point, ML applied to X-ray spectroscopies has recently exploded, showcasing its effectiveness in ... -
Interacting Quantum Gases of Lithium and Ytterbium
(2014-02-24)This dissertation describes the development of a scientic apparatus for trapping ultracold quantum gases of atomic lithium and ytterbium, and discusses the studies of interactions between such particles under a range of ...