A double-acceleration stage linear time of flight mass spectrometer (TOF MS) with Nd/YAG laser ablation cluster source was designed and constructed for cluster production, study and deposition. Cumulenic polycarbons SC n S ( n = 2-27) were...
Many alkaloids of biological importance have the 11H-pyrido (4,3,2-mn) acridine ring structure such as cystodytin and amphimedine. It would be desirable to find an effective way to synthesize a wide variety of these compounds using a single...
In this thesis, we characterize and enumerate the permutations which are realized by the orbits of signed shifts, a family of discrete dynamical systems on words. The permutations, which are called patterns of the signed shifts, are given by the...
In this work we investigate the quantum dynamics of three different configurations of nonlinear cavity systems. We begin by carrying out a quantum analysis of a dc superconducting quantum interference device (SQUID) mechanical displacement detector...
Many microbes thrive in conditions that would be detrimental to human life. These microorganisms have been dubbed extremophiles. Of these, members of a subcategory, termed thermophiles, grow optimally above 45°C. Thermoanaerobacterium...
While Cherenkov emission was discovered more than eighty years ago, the potential applications of imaging this during radiation therapy have just recently been explored. With approximately half of all cancer patients being treated by radiation at...
Partially ordered sets. ; Convex polytopes. ; Representations of groups.
This thesis deals with geometric representations of ordered sets. In a geometric representation, each element of the ordered set is assigned a geometric object, with two elements incomparable in the ordered set if and only if the corresponding...
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....
G protein coupled receptors (GPCRs) make up somewhere between 30-50% of all current drug targets, yet the structural characterization of these receptors has been moderate at best. Until recently, structural data were almost nonexistent and...
We examine variations of cops and robbers games on graphs. Our goals are to introduce some randomness into their study, and to estimate (expected) capture time. We show that a cop chasing a random walker can capture him in expected time n + o(n)....
Coherent states. Quantum field theory. Nonlinear theories.
In this thesis we study the properties of time-dependent, nontopological configurations and their effect on the macroscopic properties of a system described by a nonlinear field theory. These structures seem to be ubiquitous in relativistic field...
This thesis centers around a generalization of the classical discrete Fourier transform. We first present a general diagrammatic approach to the construction of efficient algorithms for computing the Fourier transform of a function on a finite...
We provide a theoretical model for a design involving a dc voltage biased Josephson junction (JJ) that strongly drives a high quality factor microwave cavity via the ac Josephson effect. We explore the rich classical dynamics of the resultant...
Coal combustion remains an important source of toxic metal emissions. Dilute concentrations and poor understanding of their chemistries hinders reduction of these emissions. This thesis examines the chemistry of the trace metals arsenic and mercury...
Constructibility (Set theory). Trees (Graph theory).
This thesis investigates possible initial segments of the degrees of constructibility. Specifically, we completely characterize the structure of degrees in generic extensions of the constructible universe L via forcing with Souslin trees. Then we...
The synthesis of macrocyclic tetrapyrroles continues to be an area of vigorous research due to their application to a wide range of fields spanning the physical sciences. Only recently have general syntheses for the reduced systems, such as...
Southern pine beetle -- Ecology. Mutualism (Biology). Commensalism.
A challenge for ecologists is to identify and understand the mechanisms that produce population behaviors in nature. This is particularly difficult in complex communities that comprise of tightly linked multivoltine organisms that are...
Experimental and theoretical aspects of macroscopic and mesoscopic elastic instability are investigated in this thesis. For the theoretical investigations we utilize a Lagrangian formulation of nonlinear continuum elasticity theory, the novel...
It is never an easy task to make reasonable decisions on how people should act to preserve natural resources and to have various stakeholders agree with such decisions. This difficulty arises for a number of reasons, including: (1) the existence of...
Optical tomography. ; Near infrared spectroscopy. ; Image analysis -- Mathematical models. ; Imaging systems -- Image quality -- Mathematical models. ; Image reconstruction -- Mathematical models. ; Least squares. Breast -- Tomography.
Diffuse optical tomography (DOT) has the potential to become a non-invasive and non-ionizing diagnostic imaging technique for breast cancer imaging. DOT uses near-infrared (NIR) light to illuminate the breast, generally through the use of fiber...
The main theme of this thesis is to investigate the origins of photosensitizer pharmacokinetic variability, how this pharmacokinetic variation affects photodynamic therapy (PDT), and to search for innovative strategies to reduce the...
This thesis contains some results concerning groupoid dynamical systems and crossed products. We introduce the notion of a proper groupoid dynamical system and of its generalized fixed point algebra. We show that our notion of proper groupoid...
Sorting very large datasets is a key subroutine in almost any application that is built on top of a large database. Two ways to sort out-of-core data dominate the literature: merging-based algorithms and partitioning-based algorithms. Within these...
Secondhand cigarette smoke (SHCS) is a serious pollutant that significantly increases the risk for cardiovascular disease (CVD) in millions of people worldwide. A large proportion of those exposed to SHCS are children. Female C57B16 mice were...
This study presents δ18O analyses of garnets microsampled by laser fluorination from two localities in the deep seated, Barrovian metamorphic terrane of eastern Vermont. The broad goals of the research were to constrain further the amount,...
Chapter One. Synthesis and Structure of Chiral Pt(Duphos) Terminal Phosphido Complexes. Treatment of Pt halide precursors with a secondary phosphine in the presence of the base NaOSiMe 3 gave the terminal phosphido complexes Pt(Duphos)(Ph)(PMeIs)....
Given graded C *-algebras A and B , we define the notion of an admissible pair ([straight phi], D ) for A and B . Associated to an admissible pair ([straight phi], D ) is an equivalence class of asymptotic morphisms from A to B . Under certain...
As the visual effect and movie industries are striving for realism and high fidelity images, physically based lighting, global illumination, realistic materials, and highly tessellated geometry are gradually accepted and used in movie and game...
Circadian rhythms. Proteins -- Synthesis -- Effect of light on. Genetic regulation. Neurospora crassa -- Reproduction -- Effect of light on. Neurospora crassa -- Genetics.
To understand how the circadian clock can temporally organize a cell, the biochemical characterization of a clock protein, FRQ, was initiated in Neurospora crassa using immunochemical techniques. FRQ accumulated in constant light to maximum levels...
Medical imaging methods have become increasingly important in diagnosing diseases and assisting therapeutic treatment. In particular, early detection of breast cancer is considered as a critical factor in reducing the mortality rate of women....
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...
Part 1 . A computational study targeting the lowest energy structure, electronic state and physical properties of small carbon clusters containing one or two heteroatoms has been done. The structural properties sought included whether the most...