Quantum dots. Heterostructures. Metal oxide semiconductors -- Design and construction. Silicon oxide. Electron gas. Ohmic contacts. Microelectronics -- Technological innovations.
Solid-state approaches to quantum computing include quantum dot qubit implementations based on the Loss-DiVincenzo proposal. Prior work in GaAs two-dimensional electron gas (2DEG) materials serves as a proving ground for device designs that can be...
The radio-frequency single-electron transistor (RF-SET) [1-3] has attracted significant interest as one of the fastest charge detectors known today. In this thesis, we show that by designing an on-chip superconducting LC matching network for the...
Si/SiGe quantum dots (QDs) are promising candidates for spin-based quantum bits (qubits) as a result of the reduced spin-orbit coupling as well as the Si isotopes with zero nuclear spin. Meanwhile qubit readout is a challenge related to...
The focus of this thesis is the study of nuclearity and exactness for groupoid crossed product C*-algebras. In particular, we present generalizations of two well-known facts from group dynamical systems and crossed products to the groupoid setting....
This thesis is divided into 2 parts. In the first part of the thesis, we describe a software based approach to speeding up the Magnetic Resonance Imaging modality. In the second part of the thesis, we describe Significance Tree Quantization, which...
Space plasmas. ; Magnetopause. ; Solar wind. ; Magnetic flux. ; Plasma astrophysics.
Two types of two-dimensional (2-D), coherent (time-stationary) space plasma structures, described by one-fluid, magnetostatic and isotropic plasma theory, are examined. One is the internal structure of the Earth's magnetopause and the other is...
We present a number of findings concerning groupoid dynamical systems and groupoid crossed products. The primary result is an identification of the spectrum of the groupoid crossed product when the groupoid has continuously varying abelian...
Phosphatidylinositol 3-kinase (PI3K) is a major positive regulator of the PI3K signaling pathway that regulates many important cellular functions including growth, proliferation, survival, metabolism, and angiogenesis. The PIK3CA gene, encoding the...
This thesis constitutes the first steps in the author's program to investigate the question of when a homotopy of 2-cocycles Ï‰ = {Ï‰[subscript t]}[subscript tâˆŠ[0,1]] on a locally compact Hausdorff groupoid Æ“ induces an isomorphism of the...
Quantitative Risk Analysis of Computer Networks (QSRA) addresses the problem of risk opacity of software in networks. It allows risk managers to get a detailed and comprehensive snapshot of the constitutive software on the network, assess its risk...
Computer input-output equipment. ; Computational grids (Computer systems). ; High performance computing. ; Electronic data processing -- Distributed processing.
High-performance computing increasingly occurs on computational grids composed of heterogeneous and geographically distributed systems of computers, networks, and storage devices that collectively act as a single virtual computer. A key challenge...
In this thesis we study 1=k-geodesics, those closed geodesics that minimize on any subinterval of length L=k, where L is the length of the geodesic. These curves arise as critical points of the uniform energy, a function introduced in Morse theory...
Motivated by quantum mechanics and geometric optics, it is a long-standing problem whether the length spectrum of a compact Riemannian manifold can be recovered from its Laplace spectrum. One route to proving that the length spectrum depends on the...
In this thesis, we study the dynamics of magnetic flows on compact nilmanifolds. Magnetic flows are generalizations of geodesic flows. They model the motion of a particle of unit mass and unit charge in a smooth manifold M in the presence of a...
Si-based quantum devices, including Si/SiGe quantum dots (QD), are promising candidates for spin-based quantum bits (quits), which are a potential platform for quantum information processing [1]. Meanwhile, qubit readout remains a challenging task...
This research attempts to combine known methodology with new chemistry towards the preparation of extended polycyclic aromatic hydrocarbons (PAH). The generation and Diels-Alder trapping of 1,7- and 2,6-naphthalene bisarynes was attempted for the...
The use of non-selective vasodilators for the purpose of pulmonary vasodilation has, to date, given mixed results; systemic hypotension has been the limiting factor. Lipid soluble gases (e.g. volatile anesthetics) are capable of inducing smooth...
This thesis describes a new synthesis of substituted (3H)-1,2-dithiole-3-thiones (dithiolethiones) from readily available starting materials. Dithiolethiones have a wide variety of industrial and pharmaceutical applications. These include use as...
5,6-Azulyne, the first azulyne to be prepared, has been trapped with furan to give an adduct whose crystal structure reveals marked bond alternation in the azulene pi system. The double bond in the furan moiety is responsible in part for the bond...
Forest ecology -- Northeastern States. ; Forest canopy ecology -- Northeastern States. ; Forest dynamics -- Northeastern States.
In closed-canopy forests, changes in the relative abundance of tree species due to major disturbance or to its absence are thought to be governed principally by differences among component species in the performance of juveniles. However, few...
Geomagnetic micropulsations. ; Magnetosphere. ; Cosmic magnetic fields -- Measurement.
A study of magnetospheric pulsations is presented in three parts. The first consists of a statistical survey using data from the AMPTE/IRM satellite. A number of conclusions are drawn from the study. Evidence is provided that supports the theory...
The thesis is dedicated to the understanding and characterization of brittle compressive fracture of columnar S2 ice. The work quantifies the strength of fresh-water S2 ice and investigates its characteristic brittle failure modes under biaxial...
The mannose-sensitive hemagglutinin (MSHA) of Vibrio cholerae is a member of the family of type 4 pili. Type 4 pili expressed on the surface of a number of Gram-negative bacteria are often required for host colonization. MSHA is specifically...
DC-to-DC converters -- Design and construction. Electric inductors -- Design and construction. Thin film devices -- Design and construction. Microprocessors -- Power supply. Microfabrication. Transients (Dynamics).
The data presented herein demonstrate the requirement for CD154/CD40 in the development of experimental autoimmune encephalomyelitis (EAE), an animal model for multiple sclerosis. Blockade of CD154/CD40 interactions causes a decrease in T cell and...
Friction severely limits performance in precise positioning systems. This thesis investigates one possible approach to counter friction related performance losses, friction cancellation. In this method a friction observer is used to estimate...
Let K be the function field over a finite field of odd order, and let H be a definite quaternion algebra over K. If Î‘ is an order of level M in H , we define theta series for each ideal I of Î‘ using the reduced norm on H. Using harmonic analysis...
The docking and fusion of cellular membranes plays an essential role in the secretory and endocytic pathways and in organelle inheritance. The homotypic fusion of vacuoles from the yeast Saccharomyces cerevisiae has been used as a model system to...
A new synthetic approach to both pyrrolo[2,3- b]indoles and pyrrolo[3,4- b]indoles by the reaction of 3-nitro-1-(substituted)indoles with functionalized isocyanides is presented. The reaction between 3-nitro-1-(phenylsulfonyl)indole (185) and ethyl...
The iodothyronine deiodinases, D1, D2, and D3, play a crucial role in determining the circulating and intracellular levels of active and inactive thyroid hormone (TH), and thus have a major effect on TH action during development and adulthood. The...
The respiratory control network (RC) is made up nuclei dispersed throughout the pons and medulla oblongata and receives information from various sources that alter respiratory output. My studies have been focussed on one of these nuclei that play a...
Plant MADS proteins play critical roles in vegetative and reproductive development. DNA binding and yeast three-hybrid assays suggest that plant MADS proteins function as dimers or multimers. However, little is known about how plant MADS proteins...
Calanus finmarchicus -- Georges Bank. ; Calanus finmarchicus -- Maine Gulf of. ; Calanus finmarchicus -- North Atlantic Ocean.
Calanus finmarchicus, a kind of marine zooplankton, plays an important ecological role throughout the North Atlantic. Striking seasonal variations exist in its abundance and distribution in the Gulf of Maine/Georges Bank region. On the Bank in...
Vaccines are one the greatest advances in public health. Vaccines work by priming cells of the adaptive immune system in such a way that they remember that they have encountered a specific antigen before. This then allows those cells to respond...
Our conscious experience of memory often includes reconstuctions of the past in order to fill the gaps of forgotten events and details. The goal of this thesis is to use the tools of cognitive neuroscience to better understand the cognitive and...