Dartmouth Digital Library Program

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A study of drag forces.
Drag (Aerodynamics). ; Boundary layer control.
Dartmouth Dissertations

Ground and space observations of medium frequency auroral radio emissions / by Matthew C. Broughton.
The auroral zone is a rich source of natural radio emissions that can be observed in space and at ground-level. By studying these waves, scientists can gain insight into the plasma processes that generate them and use the near-Earth space...
Dartmouth Dissertations

Kinematics and space densities for the local cataclysmic variable population.
Cataclysmic variable stars. Kinematics.
I investigate the kinematics and space densities of the local cataclysmic variable (CV) population. CVs are close binary star systems composed of a white dwarf that accretes matter from a less compact companion star in Roche lobe overflow....
Dartmouth Dissertations

Fine structure in auroral radio emissions.
Ionospheric radio wave propagation -- Observations. Hiss (Radio meteorology). Auroras -- Antarctica -- Observations.
A VersatIle Electromagnetic Waveform (VIEW) receiver was deployed at South Pole station in December 2002 in order to measure the fine structure of auroral radio emissions with high resolution and an unprecedented 500-1000 kHz bandwidth. Using this...
Dartmouth Dissertations

Examining relationships between health beliefs and medical decisions in the context of medical uncertainty.
Medical care -- Decision making. Health attitudes. Prostate -- Cancer -- Treatment -- Decision making. Prostate -- Cancer -- Patients -- Attitudes. Uncertainty. Video recording in medicine.
This dissertation used two studies to evaluate the appropriateness of a theoretical model exploring the relationships between screening/treatment beliefs and intending to be screened or treated for prostate cancer (P-CA). Study One examined...
Dartmouth Dissertations

Interspecific interactions and population dynamics of the Southern pine beetle.
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...
Dartmouth Dissertations

A catalog of clusters to z [is less than or equal to] 1 from the Oxford Dartmouth Thirty Degree Survey.
Galaxies -- Clusters -- Mathematical models. Galaxies -- Formation -- Mathematical models. Galaxies -- Clusters -- Catalogs. Galaxies -- Spectra. Algorithms. Andromeda Galaxy.
A sample of 46 previously unidentified, intermediate- to high-redshift, near-infrared (NIR)-selected galaxy clusters have been discovered in the Andromeda catalog of the Oxford Dartmouth Thirty Degree Survey (ODTS). These clusters vary from low- to...
Dartmouth Dissertations

Quantitative risk analysis of computer networks.
Computer networks -- Security measures. Computer security. Risk assessment. Operating systems (Computers) -- Evaluation.
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...
Dartmouth Dissertations

The impact of prenatal and postnatal home visiting on utilization of care.
Home care services -- Utilization -- New Hampshire. Home care services -- New Hampshire -- Evaluation. Maternal health services -- Utilization -- New Hampshire. Infant health services -- Utilization -- New Hampshire. Prenatal care -- Utilization --...
Research objective . Research suggests that home visiting services can have a significant impact on pregnancy outcomes, child health and development, parenting and maternal life course. The effect of home visiting on utilization of health services...
Dartmouth Dissertations

Functionalization of fluorocarbons.
Fluorocarbons -- Synthesis. Fluorocarbons -- Derivatives. Activation (Chemistry). Polytef -- Surfaces. Organofluorine compounds -- Synthesis.
The great strength of the C-F bond has enabled fluorocarbons to find many industrial and domestic applications, and makes C-F activation a chemical and technical challenge akin to that of C-H bond activation in hydrocarbons. In our mission to...
Dartmouth Dissertations

Novel inhibitors of MMP-1 and MMP-13 gene expression as potential therapies for arthritis.
Collagenases -- Genetic aspects. Collagenases -- Pathophysiology. Metalloproteinases -- Genetic aspects. Metalloproteinases -- Pathophysiology. Transcription factors. Extracellular matrix proteins. Cartilage -- Diseases. Arthritis -- Genetic...
Matrix metalloproteinases (MMPs) are a family of endopeptidases that collectively degrade all components of the extracellular matrix (ECM) at neutral pH. During the progression of arthritis, MMPs mediate the degradation of cartilage, which consists...
Dartmouth Dissertations

Gain experiments with a grating based free electron laser.
Free electron lasers -- Experiments. Wave guides -- Design and construction. Diffraction gratings -- Experiments. Electron beams. Infrared sources.
The far infrared region of the electromagnetic spectrum, 15-3000 Œºm in wavelength, has a paucity of narrow band laser sources. To address the issue of whether a grating based free electron laser could operate well as such a source, a grating...
Dartmouth Dissertations

Synthetic and mechanistic studies in tetrapyrrole chemistry.
Tetrapyrroles -- Synthesis. Tetrapyrroles -- Mechanism of action. Transition metal catalysts.
Previous studies have shown that the mucosal immune system is present in the female reproductive tract and under hormonal control. With the recognition that underlying stromal cells regulate epithelial cell function and hormonal responsiveness,...
Dartmouth Dissertations

Nonequilibrium dynamics of emergent field configurations.
Nonequilibrium thermodynamics -- Mathematical models. Fluctuations (Physics) -- Mathematical models. Phase transformations (Statistical physics) -- Mathematical models. Configurations.
The processes by which nonlinear physical systems approach thermal equilibrium is of great importance in many areas of science. Central to this is the mechanism by which energy is transferred between the many degrees of freedom comprising these...
Dartmouth Dissertations

Radical methodologies with indole and synthetic strategies towards the indole alkaloids, echitamine and prenostodione.
Indole alkaloids -- Synthesis. Ring formation (Chemistry). Radicals (Chemistry).
A novel radical cyclization of 2-bromoindoles was examined, generating a series of hexahydropyrrolo[3,4- b ]indoles in fair yield. This process involved the generation of a variety of indole-3-carboxamides followed by the introduction of bromine at...
Dartmouth Dissertations

Classical and quantum aspects of elastic instability: theory and experiment.
Elastic solids. Elasticity. Structural stability. Buckling (Mechanics). Silicon. Quantum theory. Mesoscopic phenomena (Physics).
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...
Dartmouth Dissertations

The impact of sodium channel isoform expression on cerebellar Purkinje cell development.
Purkinje cells. Sodium channels -- Genetic aspects. Excitation (Physiology). Neurons -- Physiology. Cerebellum -- Physiology. Genetic regulation.
Voltage-dependent sodium channels (Na v ) are critical determinants of the ability of a neuron to generate and propagate action potentials. While a large family of Na v isoforms has been identified, the impact of specific isoforms on the electrical...
Dartmouth Dissertations

New synthetic approaches to chlorins and bacteriochlorins.
Pyrroles -- Synthesis. Porphyrins -- Synthesis.
Naturally occurring macrocyclic tetrapyrroles of the chlorin and bacteriochlorin classes play important roles in essential biological processes, including photosynthesis and nitrogen cycling. The chromophores also show promise in various...
Dartmouth Dissertations

Synthesis and characterization of phosphido-coated gold nanoclusters and gold phosphido complexes.
Gold -- Analysis. Gold compounds. Metal complexes -- Synthesis. Phosphides. Ligands.
Chapter one: Gold(I) phosphido complexes: Synthesis, structure and reactivity . Deprotonation of the phosphine complexes Au(PHR 2 )Cl with aqueous ammonia gave the gold(I) phosphido complexes [Au(PR 2 )] n (PR 2 = PMes 2 ( 1 ), PCy 2 ( 2 ), P(t-Bu)...
Dartmouth Dissertations

Examining auroral downward current region processes using ground based data.
Auroras -- Alaska -- Observations. Magnetospheric currents.
This thesis presents data from ground camera observations of the aurora conducted from Alaska during the winters of 2005 through 2007. In conjunction with these camera observations, conjugate radar observations of the auroral ionosphere were...
Dartmouth Dissertations

Lighting and optical tools for image forensics.
Image analysis. Image processing -- Digital techniques. Photography -- Retouching. Photographs -- Forgeries. Lighting. Optics. Forensic sciences.
We present new forensic tools that are capable of detecting traces of tampering in digital images without the use of watermarks or specialized hardware. These tools operate under the assumption that images contain natural properties from a variety...
Dartmouth Dissertations

Evaluation and engineering of Saccharomyces cerevisiae for cellulase expression and growth on insoluble cellulose.
Saccharomyces cerevisiae -- Genetics. Cellulase -- Biotechnology. Cellulose -- Biotechnology. Biomass conversion -- Technological innovations.
Dartmouth Dissertations

Evaluating mobility predictors in wireless networks for improving handoff and opportunistic routing.
Wireless communication systems. Computer network protocols.
We evaluate mobility predictors in wireless networks. Handoff prediction in wireless networks has long been considered as a mechanism to improve the quality of service provided to mobile wireless users. Most prior studies, however, were based on...
Dartmouth Dissertations

Shared decision making for people with severe mental illness.
Mentally ill -- Care -- Decision making. Mental illness -- Treatment -- Decision making. Mental health services -- Decision making. Mental health -- Information services. Medical informatics. Mental Disorders -- drug therapy.
Objective. We explored preferences and perceptions about treatment decision-making roles among persons with severe mental illness and evaluated two computer-based medication values clarification tools. Methods. In this study we conducted a pilot...
Dartmouth Dissertations

Physiological and neural mechanisms of anxiety, negativity, and threat.
Anxiety -- Physiological aspects. Threat (Psychology) -- Physiological aspects. Amygdaloid body -- Psychophysiology. Brain -- Psychophysiology.
The objective of this thesis was to examine the neural and physiological substrates underlying the processing of aversive information, and how individual differences in anxiety influence these responses. In a series of experiments, we utilized skin...
Dartmouth Dissertations

The effects of context and familiarity on person perception: examining the neural substrates of facial attractiveness.
Face perception -- Physiological aspects. Face perception -- Social aspects. Sex differences (Psychology). Neuropsychology.
The general objective of the current thesis was to investigate the neural substrates underlying the perception of opposite-sex faces. Building on what is already known about the distributed network of brain areas supporting various dimensions of...
Dartmouth Dissertations

Bottom-up effects of nutrient enrichment on plants, pollinators, and their interactions.
Meadow ecology -- Colorado. Angiosperms -- Nutrition. Angiosperms -- Pollination. Plants -- Effect of nitrogen on. Insect pollinators -- Ecology -- Colorado. Mountain plants -- Ecology -- Colorado. Bees -- Ecology -- Colorado. Bees -- Nutrition --...
Nutrients play fundamental roles in biological systems, affecting plant growth and quality, community structure, and species interactions. Although the effects of nutrients on primary and secondary production have been well documented, their...
Dartmouth Dissertations

Aging minds and twisting attitudes: effects of age-related decline in executive function on older adults' attitudes toward stigmatized individuals.
Stigma (Social psychology). Aging -- Psychological aspects. Cognition -- Age factors. Older people -- Attitudes.
Extensive research on aging has demonstrated that normal aging debilitates executive function, a system that is critical for regulating stereotypes. However, there is a paucity of research on whether age-related declines to executive function...
Dartmouth Dissertations

Mesh-Mon: a monitoring and management system for wireless mesh networks.
Wireless communication systems. Computer networks. Routers (Computer networks).
A mesh network is a network of wireless routers that employ multi-hop routing and can be used to provide network access for mobile clients. Mobile mesh networks can be deployed rapidly to provide an alternate communication infrastructure for...
Dartmouth Dissertations

Restraint and disinhibition in the brain.
Self-control -- Physiological aspects. Nucleus accumbens -- Psychophysiology. Reducing diets -- Psychological aspects. Eating disorders -- Psychological aspects. Promiscuity -- Psychological aspects.
As humans we create goals and strive toward ideals, engaging in a constant endeavor to better ourselves or maintain our success. Whether goals are distant hopes for the future, or small steps of change, success requires some control over...
Dartmouth Dissertations

Reciprocal benefits in a plant-pollinator mutualism.
Mutualism (Biology). Insect-plant relationships. Insect population density. Bumblebees -- Ecology. Delphinium -- Ecology.
Mutualisms may facilitate coupled population expansion or decline if changes in either partner species lead to similar changes in the other species. However, few studies have measured how both species in a mutualism respond to changes in each...
Dartmouth Dissertations

CD8+ T cell responses to acute and chronic viral infections governed by costimulatory signals and CD4 help.
T cells. T cells -- Receptors. CD antigens. CD4 antigen. Immunologic memory. Herpesvirus diseases -- Immunological aspects. Vaccinia. CD8-Positive T-Lymphocytes -- immunology. CD4-Positive T-Lymphocytes -- immunology. Herpesviridae Infections --...
The phenomenon of immunological memory has been known for thousands of years. This knowledge has been applied to vaccination, which has resulted in a dramatic reduction in the number of deaths due to infectious diseases. Immunological memory is...
Dartmouth Dissertations

Mutations that compromise cohesion predispose chiasmate and achiasmate chromosomes to age-dependent nondisjunction in Drosophila oocytes.
Chromosome abnormalities. Ovum. Maternal age. Aneuploidy. Aging -- Genetic aspects. Drosophila -- Molecular genetics. Nondisjunction.
Aneuploidy is the leading cause of pregnancy loss and birth defects in humans. At least 5% of all recognized pregnancies are aneuploid. Maternal meiosis is especially error-prone and the rate of chromosome missegregation increases exponentially...
Dartmouth Dissertations

Part I, a photoprecursor for difluorocarbene: Part II, syntheses and studies of the highly fluorinated [2.2.2] propellanes.
Organofluorine compounds -- Synthesis. Carbenes (Methylene compounds) -- Synthesis. Propellanes -- Synthesis.
Part I. A photoprecursor for difluorocarbene . The goal of this research was to develop a more practical and efficient photoprecursor for difluorocarbene. The first approach was concerned with the synthesis of 4,4-difluoropyrazoline-3,5-dione ( 5...
Dartmouth Dissertations

Determinants of reproductive success in a neotropical migratory songbird: timing, site-selection and mating strategies.
Ovenbird -- Fertility. Ovenbird -- Reproduction. Ovenbird -- Behavior. Ovenbird -- Ecology. Ovenbird -- Nests. Ovenbird -- Maryland -- Anne Arundel County. Courtship in animals -- Maryland -- Anne Arundel County. Brown-headed cowbird -- Maryland --...
Identifying and understanding sources of individual variation in fecundity is of central importance to life history theory and population ecology. In this study, I first examined how factors on the breeding grounds in eastern Maryland affected the...
Dartmouth Dissertations

Regulation of matrix metalloproteinase gene expression by a synthetic rexinoid.
Metalloproteinases -- Inhibitors -- Mechanism of action. Collagenases -- Inhibitors -- Mechanism of action. Receptor-ligand complexes. Extracellular matrix proteins. Matrix Metalloproteinases.
The irreversible destruction of the tissues that comprise synovial joints is the hallmark of both rheumatoid arthritis and osteoarthritis. In both diseases, inflammatory cytokines, such as interleukin-1β, stimulate the production of matrix...
Dartmouth Dissertations

The importance of p53-dependent transcriptional responses in the differentiation and curability of human embryonal carcinoma.
Testis -- Cancer -- Genetic aspects. p53 antioncogene -- Regulation. Embryonal tumors -- Pathophysiology. Germ cells -- Tumors -- Pathophysiology. Cisplatin -- Mechanism of action. Tretinoin. Testicular Neoplasms -- in children. Neoplasms
Dartmouth Dissertations

Synthetic studies toward the furanosteroids.
Furans -- Synthesis. Steroid drugs. Enzyme inhibitors -- Therapeutic use. Cancer cells -- Growth -- Regulation.
The furanosteroids are an important class of natural products that have been found to effectively inhibit various biologically important enzymes. These enzymes include the phosphoinositide-3-kinase (PI3K) family and the polo-like kinase (PLK1)...
Dartmouth Dissertations

Catalytic asymmetric P-C bond formation with Pt-phosphido complexes.
Organoplatinum compounds -- Synthesis. Organoplatinum compounds -- Reactivity. Organophosphorus compounds -- Synthesis. Organophosphorus compounds -- Reactivity. Asymmetric synthesis. Phosphate carbon. Platinum catalysts.
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)....
Dartmouth Dissertations

The resistance to sliding along Coulombic shear faults in columnar S2 ice.
Ice mechanics. Friction. Shear (Mechanics). Strains and stresses. Ice -- Brittleness. Ice -- Ductility.
Dartmouth Dissertations

Development of a multi-high frequency electrical impedance tomography system for breast imaging.
Electrical impedance tomography. Breast -- Imaging. Imaging systems -- Design and construction.
Dartmouth Dissertations

Theoretical study of carbon-heteroatom clusters: Theoretical study and comparison of the intradiol and extradiol oxidation of catechol.
Catechol -- Biodegradation. Glycols. Oxidation. Carbon compounds -- Mathematical models.
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...
Dartmouth Dissertations

The influence of shared mental models of nosocomial bloodstream infections on neonatal intensive care unit infection rates.
Neonatal infections -- Prevention. Nosocomial infections -- Prevention. Neonatal intensive care -- Social aspects. Neonatal intensive care -- Psychological aspects.
Statement of the problem. Nosocomial bloodstream infections (NBSIs) are a significant source of morbidity and mortality for the very low birth weight babies (VLBW) in neonatal intensive care units (NICUs). Efforts to reduce the rates of infection...
Dartmouth Dissertations

Designing treatment individualization in photodynamic therapy to compensate for pharmacokinetic variability.
Photochemotherapy. Photosensitizing compounds -- Therapeutic use. Pharmacokinetics. Drugs -- Physiological effect.
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...
Dartmouth Dissertations

Regulation of ENaC expression by corticosteroids and SGK1 in cortical collection duct cells and mammary epithelial cells.
Sodium channels. Adrenocortical hormones. Protein kinases. Epithelial cells. Mammary glands. Sgk protein.
Regulation of transepithelial sodium transport by corticosteroids occurs in two phases: early and delayed. The early phase involves the activation and translocation of pre-existing epithelial sodium channels (ENaC); whereas, the delayed phase...
Dartmouth Dissertations

Activation of C-F bonds using transition metals by reduction and external acid.
Fluorine compounds. Activation (Chemistry). Transition metal catalysts.
Dartmouth Dissertations

Complex integrated order fulfillment technology: a holonic approach.
Order picking systems -- Automation -- Computer simulation.
This research ventures into areas beyond traditional control frameworks in its focus. It integrates holonic concepts into a hierarchical control framework of a complex automated order fulfillment technology. Simulation of an actual full-scale order...
Dartmouth Dissertations

Critical structural features involved in the determination of agonist efficacy and trafficking of the [alpha]-amino-3-hydroxy-5-methyl-4-isoxazolepropionate (AMPA) receptor.
Glutamic acid -- Receptors. Ion channels -- Molecular aspects. Ligand binding (Biochemistry). Biological transport -- Regulation. Receptors.
AMPA receptors (AMPA-Rs) are glutamate-gated ion channels that mediate the majority of excitatory synaptic transmission in the brain. AMPA-Rs are generally found in vivo as hetero-tetramers made up of a combination of the GluR1-GluR4 subunits....
Dartmouth Dissertations

Synthesis of multimetallic nanocomposite materials utilizing block copolymers.
Block copolymers. Nanostructured materials -- Synthesis. Metallic composites -- Synthesis.
Nanocomposite materials containing both gold and cobalt were synthesized using block copolymers as agents for controlling spatial organization of the nanoparticles. The targeted polymers are polystyrene- block -poly(alkyne-functional)styrene...
Dartmouth Dissertations

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