Dartmouth Digital Library Program

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Optimizing winding designs for high-frequency magnetic components.
Electric generators -- Windings. Electric inductors -- Design and construction -- Mathematical models. Electric current converters -- Design and construction -- Mathematical models. Energy dissipation -- Mathematical models.
Magnetic components for high-frequency power conversion applications can have significant losses that compromise the performance of the converter. In particular, winding losses can be large due to high-frequency effects that are difficult to model...
Dartmouth Dissertations

On-line metasearch, pooling and system evaluation.
Information retrieval -- Mathematical models. ; Electronic information resource searching. ; Computer algorithms. ; Decision making -- Data processing. ; Mathematical optimization.
This thesis presents a unified method for simultaneous solution of three problems in Information Retrieval--metasearch (the fusion of ranked lists returned by retrieval systems to elicit improved performance), efficient system evaluation (the...
Dartmouth Dissertations

On the density of abundant numbers
Number theory. ; Numbers Natural. ; Algorithms.
Dartmouth Dissertations

Simulating electron radiation belt dynamics.
Van Allen radiation belts -- Mathematical models. ; Magnetosphere -- Mathematical models. ; Magnetohydrodynamics -- Mathematical models.
The physics of geomagnetically-trapped radiation has been a topic of interest since the discovery of the Van Allen belts in 1958. As the energetic particles comprising these belts can pose a hazard to human activity in space, considerable effort...
Dartmouth Dissertations

Satake parameters of Siegel modular forms.
Siegel domains. Modular groups. Hecke algebras. Forms
In the 1960s Satake proved the existence of an isomorphism between the local Hecke algebra and the ring of polynomials invariant under the action of the signed permutation group W n (the Weyl group associated to Sp n over a local field)....
Dartmouth Dissertations

Molecular mechanisms of vacuole membrane fusion.
Membrane fusion. ; Tonoplasts. ; Plant vacuoles. ; Saccharomyces cerevisiae -- Molecular aspects.
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...
Dartmouth Dissertations

A study of charge transfer in cyanoanthracene/methyl-substituted benzene exciplexes.
Excited state chemistry. ; Photochemistry. ; Charge transfer.
Dartmouth Dissertations

Factors controlling the seasonal abundance and distribution of Calanus finmarchicus in the Gulf of Maine/Georges Bank Region.
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...
Dartmouth Dissertations

Explicit bounds on twin primes and Brun's Constant.
Numbers, Prime. Number theory.
The study of twin primes gives rise to several famously difficult problems in number theory--in fact, we still cannot definitively say whether there are infinitely many twin primes. In this work, we consider a related problem, namely: What is the...
Dartmouth Dissertations

Hardware-Assisted Secure Computation.
Computer networks -- Security measures. Computer networks -- Access control. Computer network protocols.
The theory community has worked on Secure Multiparty Computation (SMC) for more than two decades, and has produced many protocols for many settings. One common thread in these works is that the protocols cannot use a Trusted Third Party (TTP), even...
Dartmouth Dissertations

The arithmetic of cyclic subgroups / by Zebediah Engberg.
In this thesis, we consider several problems relating to cyclic subgroups of the group [mathematical equation]. Each element of [mathematical equation] has a unique representative in one of the two intervals [mathematical equation] and...
Dartmouth Dissertations

Computational methods for the discovery and application of protein sequence-structure-function relationships / by Lu He.
Proteins are ubiquitous in cells and are essential to a wide range of biological processes. Since existing proteins occupy only a small portion of the space of possible amino acid composition, understanding their sequence-structure-function...
Dartmouth Dissertations

Induced optical effects in germanium-doped silica glass.
Silica, Vitreous -- Optical properties.
Dartmouth Dissertations

Finite subgroups of three dimensional rotation groups.
Group theory. Geometry Algebraic.
Dartmouth Dissertations

Prime polynomials over finite fields.
Polynomials. Finite fields (Algebra). Algebraic functions. Number theory.
The ring of univariate polynomials over a finite field shares many foundational arithmetic properties with the ring of rational integers. This similarity makes it possible for many problems in elementary number theory to be translated 'through the...
Dartmouth Dissertations

On the poisson relation for lens spaces / by Donato R. Cianci
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...
Dartmouth Dissertations

Clay mineralogy and geochemistry of soils and sediments with perma frost in interior Alaska.
Clay minerals -- Alaska. ; Soils -- Alaska. ; Frozen ground -- Alaska.
Dartmouth Dissertations

Fault modeling and design of dynamic logic.
Logic programming. ; Electronic digital computers -- Circuits -- Testing -- Mathematical models. ; Fault-tolerant computing.
Today''s fastest microprocessors, logic chips, and even memory chips employ dynamic logic as the key part to achieving advanced performance. Dynamic logic only retains the correct data state briefly and is far less robust than previous technologies...
Dartmouth Dissertations

Novel compression techniques with applications in medical image acquisition and image storage.
Image compression. ; Image processing -- Digital techniques. ; Diagnostic imaging. ; Magnetic resonance imaging. ; Coding theory. ; Wavelets (Mathematics).
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...
Dartmouth Dissertations

Novel synthetic approaches to polycyclic aromatic hydrocarbons.
Polycyclic aromatic hydrocarbons -- Synthesis.
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...
Dartmouth Dissertations

Observation of changing information sources.
Information resources management -- Mathematical models. ; Database management -- Methodology. ; Change. ; World Wide Web.
Many modern information management tasks consist of an observer that must maintain current knowledge of a collection of changing information. The goal of this observer is to maintain acceptably accurate state estimates given limited observation...
Dartmouth Dissertations

The Santo Niño Ag-Pb-Zn Vein, Fresnillo District, Mexico : Geology, Sulphide And Sulphosalt Mineral.
Geology -- Mexico -- Fresnillo Region. ; Sulfide minerals -- Mexico -- Fresnillo Region. ; Sulfosalts. ; Geochemistry -- Mexico -- Fresnillo Region.
Dartmouth Dissertations

The role of nongeometric information in spatial language.
Space and time in language. ; Space perception. ; Figure-ground perception. ; Psycholinguistics.
Across languages, there exists a relatively small number of spatial prepositions. These terms are used to express the infinite number of possible spatial locations of an unlimited number of different entities in the environment. Previous research...
Dartmouth Dissertations

Rabbit genomic clones for synovial fibroblast collagenase: tools for understanding connective tissue disease.
Collagenases. ; Fibroblasts. ; Connective tissues -- Diseases -- Genetic aspects. ; Clone cells. ; Rabbits.
Dartmouth Dissertations

Habitat partitioning by notonectids: temporal patterns and the role of spatial complexity.
Backswimmers (Insects) -- Ecology. ; Habitat partitioning (Ecology). ; Spatial behavior in animals. ; Aquatic insects -- Ecology.
Dartmouth Dissertations

New measurements of equatorial spread-F: high-altitude irregularities and drifting bubbles.
Plasma instabilities. ; Ionospheric electron density. ; Ionosphere.
As a result of an unstable plasma stratification the nighttime equatorial ionosphere is subject to a variety of plasma instabilities known commonly as equatorial spread-F. In its fully developed form spread-F consists of large wedges of depleted...
Dartmouth Dissertations

New preparations of substituted (3H)-1,2-dithiole-3-thiones and investigations into the mechanism of their formation.
Dithiole -- Synthesis. ; Thiols -- Synthesis. ; Aliphatic compounds -- Synthesis.
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...
Dartmouth Dissertations

Role of cytochrome P4503A in acetaminophen toxicity.
Acetaminophen -- Toxicology. ; Hepatotoxicology. ; Cytochrome P-450 -- Pathophysiology. ; Rats -- Physiology.
CYP3A has the highest affinity for oxidation of Acetaminophen (APAP) with a Km close to the concentration observed in human serum after administration of therapeutic doses of APAP. CYP3A may be induced by numerous drugs as well as alcohols. We...
Dartmouth Dissertations

Juvenile response to canopy structure: population and community-level implications in a subalpine forest of the northeastern U.S.
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...
Dartmouth Dissertations

Electrical impedance tomography for breast imaging.
Electrical impedance tomography -- Equipment and supplies -- Design and construction. ; Breast -- Cancer -- Diagnosis. ; Breast -- Imaging.
Dartmouth Dissertations

A study of magnetospheric pulsations.
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...
Dartmouth Dissertations

Linking Atlantic salmon (Salmo salar) survival with their habitat using environmental tracers.
Atlantic salmon -- Ecology. ; Atlantic salmon -- Habitat. ; Atlantic salmon -- Food. ; Radioactive tracers in ecology. ; Stable isotopes in ecological research. ; Strontium -- Isotopes -- Environmental aspects. ; Cesium -- Isotopes -- Environmental...
Dartmouth Dissertations

Computations of wall-bounded two-dimensional turbulence.
Turbulence. ; Navier-Stokes equations -- Numerical solutions. ; Galerkin methods. ; Boundary layer -- Mathematical models. ; Viscous flow -- Mathematical models.
Dartmouth Dissertations

Molecular analysis of mannose-sensitive hemagglutinin formation and toxin secretion by Vibrio cholerae.
Vibrio cholerae -- Molecular genetics. ; Hemagglutinin -- Analysis. ; Peptidase -- Pathophysiology.
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...
Dartmouth Dissertations

Sounding rocket based investigations of HF waves in the auroral ionosphere.
Ionospheric radio wave propagation -- Observations. ; Auroras -- Alaska -- Observations. ; Sounding rockets -- Observations.
Dartmouth Dissertations

The regulation of apoptosis by protein phosphatases: impact on intracellular acidification and processing of the retinoblastoma protein.
Apoptosis. ; Phosphoprotein phosphatases. ; Retinoblastoma. ; Immunosuppression.
Dartmouth Dissertations

Microfabrication of magnetic components for high frequency DC-DC power conversion at high currents and low voltages.
DC-to-DC converters -- Design and construction. Electric inductors -- Design and construction. Thin film devices -- Design and construction. Microprocessors -- Power supply. Microfabrication. Transients (Dynamics).
Dartmouth Dissertations

Investigations in non-model-based friction estimation and compensation in motion control.
Friction. ; Friction -- Mathematical models. ; Friction -- Computer simulation. ; Motion. ; Machinery Kinematics of. ; Filters (Mathematics). ; Estimation theory.
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...
Dartmouth Dissertations

Investigation of trans-acting factors in AURE-mediated mRNA turnover.
Messenger RNA -- Metabolism. ; Trans-Activation (Genetics). ; RNA-protein interactions. ; Adenosine. ; Uridine. ; Lactate dehydrogenase. ; Genetic regulation. ; RNA-Binding Proteins. ; Protein processings Post-transcriptional. ; Hippel-Lindau...
Post-transcriptional pathways provide a major means of regulating eukaryotic gene expression. Reiterations of the AU-rich element (AURE) located within the 3' UTR of many labile cytokine and proto-oncogene mRNA serve as signals for rapid...
Dartmouth Dissertations

Investigation into the syntheses and reactions of 2-nitroindoles and 3-nitroindoles and discovery of novel syntheses of the pyrrolo[3,4-b]indole and pyrrolo[2,3-b]indole ring systems.
Carbazole -- Synthesis. ; Indole. ; Pyrroles.
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...
Dartmouth Dissertations

Sex- and region-specific differences in GABA[subscript A] receptor function in neurons of the hypothalamus and forebrain.
GABA -- Receptors. ; GABA -- Physiological effect. ; Sexual behavior in animals. ; Hypothalamus -- Physiology.
The overall goal of this research has been to investigate sex-specific and region-specific differences in the function of the γ-aminobutyric acid type A (GABA[subscript A]) receptor in two regions of the brain which are essential for the...
Dartmouth Dissertations

An eigenspace approach to decomposing representations of finite groups.
Representations of groups. ; Finite groups. ; Transformations (Mathematics).
Dartmouth Dissertations

Stable isotope paleoclimate studies in the western Basin and Range and greater Yellowstone Region.
Orogeny -- Sierra Nevada (California and Nevada). ; Paleoclimatology -- Sierra Nevada (California and Nevada). ; Paleoclimatology -- Montana. ; Paleoclimatology -- Holocene. ; Metamorphism (Geology) -- Pakistan -- Nanga Parbat.
Dartmouth Dissertations

Long-term demographic trends, population limitation, and the regulation of abundance in a migratory songbird.
Black-throated blue warbler -- Reproduction. ; Black-throated blue warbler -- New Hampshire. ; Black-throated blue warbler -- Jamaica. ; Black-throated blue warbler -- Mortality -- Mathematical models. ; Climatic changes -- Environmental aspects --...
Understanding the processes that determine the abundance of migratory birds has been difficult because these species move between diverse locations on different continents. Furthermore, events during one stage of the annual cycle are likely to...
Dartmouth Dissertations

The effect of movie smoking on smoking attitudes and behavior.
Smoking in motion pictures. ; Mass media and teenagers -- United States. ; Mass media and young adults -- United States. ; Teenagers -- United States -- Attitudes. ; Young adults -- United States -- Attitudes. ; Motion picture actors and actresses...
Thousands of adolescents try their first cigarette each day, and many of these adolescents go on to become adult smokers who will die from smoking-related causes. This thesis examines the role of movie portrayals of smoking as a predictor of...
Dartmouth Dissertations

Regulation of the floral organ identity gene APETALA3 in Arabidopsis thaliana.
Arabidopsis thaliana -- Genetics. ; Genetic regulation.
APETALA3 (AP3) is a MADS box gene required for normal development of the petals and stamens in the Arabidopsis flower. AP3 transcriptional regulation occurs in two stages; an initial establishment phase, which is mediated by LEAFY (LFY) and UNUSUAL...
Dartmouth Dissertations

Modeling effects of magnetic field line curvature on transient proton belts.
Magnetosphere -- Mathematical models. ; Magnetic fields -- Mathematical models. ; Scattering (Physics) -- Mathematical models.
Lowest order charged particle motion in the Earth''s magnetosphere can be explained using simple adiabatic theory. However, nonadiabatic theory is required to explain particle behavior in cases such as when the particle's gyroradius is large...
Dartmouth Dissertations

Effects of selenium deficiency on deiodinase expression and thyroid hormone economy in the rat during development.
Thyroid hormones -- Physiological effect. ; Selenium -- Physiological effect. ; Thyroid hormones -- Synthesis.
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...
Dartmouth Dissertations

Routing games.
In large and complex networks such as the Internet and road networks, traffic routing is typically decentralized. Users in the network choose their routes independently to minimize their own delay, leading to complicated and nonintuitive outcomes...
Dartmouth Dissertations

Development of a ruby fluorescence-based surface probe of tribological processes.
Plastics -- Testing. ; Fluorescent probes. ; Temperature measuring instruments. ; Tribology. ; Polytef -- Thermal properties. ; Nylon -- Thermal properties.
This research has established feasibility of surface temperature characterization using ruby fluorescence. Study was performed in pin-on-disk geometry, with balls made of different plastics sliding against the sapphire disk. Fluorescence signal was...
Dartmouth Dissertations

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