Dartmouth Digital Library Program

Thumbnail

Title

Subject

Description

Collection

A millikelvin atomic force microscope for the investigation of mesoscopic devices.
Atomic force microscopy. ; Microscopes -- Design and construction. ; Mesoscopic phenomena (Physics).
Dartmouth Dissertations

Advancement of magnetic resonance poroelastography for applications in brain imaging / by Adam J. Pattison.
Brain tissue mechanics are an important biomarker for neurological disorders, yet methods to obtain tissue information yield inconsistent conclusions. These techniques can be invasive or require excised tissue, where tissue function is altered from...
Dartmouth Dissertations

Multimodal electroencephalography and near-infrared spectroscopy neuroimaging measurement and analysis / by Paolo Giacometti
This project focuses on the development of research tools and methods that are used to study the relationship between neural activity and subsequent hemodynamic responses in the human brain. This relationship, referred to as neurovascular coupling,...
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

Patient classification from fMRI brain activation patterns.
Brain -- Magnetic resonance imaging. ; Brain mapping. Brain -- Localization of functions. ; Diagnostic imaging. ; Pattern perception. ; Patients -- Classification. ; Alzheimer's disease -- Diagnosis. ; Schizophrenia -- Diagnosis. ; Brain damage --...
Earlier work has suggested that various neurological or neuropsychiatric disorders may result in characteristic spatial patterns in brain activation, potentially allowing their detection from maps of brain activity under different conditions....
Dartmouth Dissertations

An analysis of the locomotive stimulant and the ECoG effects of L-DOPA.
L-dihydroxphelylalanine. ; Amphetamines.
Dartmouth Dissertations

Development and quantification of a 3D brain deformation model for model-updated image-guided stereotactic neurosurgery.
Three-dimensional imaging in medicine -- Mathematical models. ; Stereoencephalotomy.
In the past, clinicians skilled at image-guided neurosurgery have relied solely on pre-operative scans for their navigational information. Often in the course of surgery, tissue is purposely retracted/resected or inadvertently moved resulting in a...
Dartmouth Dissertations

The effects of Niemann-Pick type C disease on the development of Purkinje cell form and function.
Purkinje cells. Neurons -- Physiology. Neurons -- Growth. Developmental neurobiology. Nerve growth factor. Niemann-Pick Diseases. Central Nervous System -- growth & development.
Dartmouth Dissertations

Relationship of freezing and stimulus-evoked heart-rate changes in the acoustic startle habituation paradigm.
Heart beat. ; Fear. ; Acoustic reflex. ; Startle reaction.
Dartmouth Dissertations

Statistical analysis and empirical modeling of large- and small-scale plasma drifts in Earth''s high-latitude ionosphere.
Electric fields in the high-latitude regions of Earth's ionosphere are an important component of the coupled magnetosphere-ionosphere-thermosphere system. Characterizing the average behavior of these fields (or the corresponding drifts) is useful...
Dartmouth Dissertations

The use of computer models to capture, understand and control dynamic brain processes.
Brain -- Physiology -- Mathematical models. Brain stem -- Effect of chemicals on. Basal ganglia -- Physiology.
Understanding how the brain works remains one of the toughest problems in science, despite the progress in scientific technology available for its study. The difficulty lies in the fact that the brain is a dynamic system, while the body of facts...
Dartmouth Dissertations

Brain repair after trauma : birth and migration of immature neurons after focal traumatic brain injury in piglets and human children / by Sabrina Rose Taylor.
Traumatic brain injury (TBI) is the leading cause of acquired disability in children, yet innate repair mechanisms are incompletely understood. A possible innate mechanism to repair injury after insult is neurogenesis - the birth, migration,...
Dartmouth Dissertations

Forest structure and atmospheric interactions : predictive models for subalpine balsam fir forest
Forest hydrology -- Mathematical models; Forest Meteorology -- Mathematical models; Balsam fir
Dartmouth Dissertations

Spectroscopic analyses of type Ia supernovae / by Jerod Parrent.
After decades of searching we have yet to find the progenitor systems for type Ia supernovae. In fact most of what we know about this homogeneous class of supernovae is from spectral features associated with the incinerated remains of the C+O white...
Dartmouth Dissertations

Determining anthropogenic and natural controls on the global mercury cycle using lake sediment and ice cores ; by Samuel Adams Beal Jr.
While anthropogenic emissions of the toxic element mercury (Hg) to the atmosphere are currently rising, major uncertainties remain in determining the relative impacts of anthropogenic activity and natural processes on the global Hg cycle. In this...
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

Exercise and the brain : impacts on cognition neural function and mental health / by Andrea M. Robinson.
It has been well established that physical exercise has broad impacts across the lifespan, including improved cognition, brain function, and mental health. Studies investigating the mechanism underlying the cognitive enhancing effect of exercise...
Dartmouth Dissertations

Role of NA[subscript v]1.1 in septo-hippocampal coordination of theta rhythm and spatial memory : implications for cognitive deficits in Dravet syndrome / by Alex C. Bender
In the nervous system, neuronal communication relies critically on the function of membrane ion channels. One of these is the voltage-gated sodium channel (VGSC), which is essential for the generation and propagation of action potentials in...
Dartmouth Dissertations

On the nature mechanisms and neural correlates of visual feature conjunction learning / by Eric Andrew Reavis.
Visual searches for a conjunction of features (e.g., a particular combination of color and shape) are ordinarily slow and difficult. However, search efficiency for a particular conjunction can improve dramatically within a few hundred practice...
Dartmouth Dissertations

Ground-based observations of auroral radio emissions.
Hiss (Radio meteorology). VLF emissions. Auroras.
Dartmouth Dissertations

The effects of brain damage on source monitoring.
Brain damage -- Psychological aspects. Memory. Brain -- Localization of functions. Neuropsychology.
Two experiments were designed to investigate the effects of brain damage on source monitoring. Source monitoring is the process of making decisions about the origins of memories. Previous research has demonstrated that source monitoring judgments...
Dartmouth Dissertations

An experimental study of the propagation and dispersion of internal atmospheric gravity waves.
Gravity waves. Ionosphere.
Dartmouth Dissertations

Cholesterol metabolism and human diseases
Cholesterol -- Metabolism. ; ATP-binding cassette transporters. ; Niemann-Pick diseases -- Genetic aspects. ; Acyltransferases. ; Pregnenolone. ; Sterols. ; Acetyl-CoA C-Acetyltransferase.
Dartmouth Dissertations

Mapping the junction of action perception and production.
Perceptual-motor learning -- Physiological aspects. ; Language acquisition -- Physiological aspects. ; Motor ability -- Physiological aspects. ; Knots and splices.
The studies presented in this dissertation explore several points of intersection between action perception and production within the human brain. One's ability to use perceptual information about another individual's actions to guide and inform...
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

$Influence of the infracerebellar nucleus on respiratory activity.$
Influence of the infracerebellar nucleus on respiratory activity.
Respiration -- Regulation. ; Cerebellar nuclei.
Dartmouth Dissertations

Steady state NMR imaging of cerebral blood volume as an index of chronic hypoxia induced angiogenesis.
Neovascularization. Brain -- Blood-vessels -- Magnetic resonance imaging. Blood volume -- Measurement. Cerebral circulation -- Measurement. Anoxemia. Blood Volume Determination -- methods.
Angiogenesis is part of the natural defense mechanism in brain against hypoxia and ischemia. Animal models and methods for the non-invasive investigation of cerebral angiogenesis are needed. This thesis addresses the hypothesis that steady state,...
Dartmouth Dissertations

The effects of lesions of the cerebellar vermis and cerebellar hemispheres on conditioned and unconditioned heart-rate responses in restrained and unrestrained rats.
Cerebellum -- Experiments. ; Rats -- Behavior. ; Heart beat.
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

Chronology of Neogene tectonics in the Central Andes (27°-33° S) of western Argentina based on the magnetic polarity stratigraphy of foreland basin sediments.
Geology, Stratigraphic -- Neogene. ; Plate tectonics -- Argentina. Geology -- Argentina.
Dartmouth Dissertations

Rewards and self-regulation in the resting brain / by Jeremy Ford Huckins
The ability to resist highly tempting reward impulses is a struggle that all humans face on a daily basis, one that gives rise to many societal problems such as obesity and drug addiction. This form of self-regulation involves a critical balance...
Dartmouth Dissertations

The sturucture and function of brain networks underlying self-evaluation / by Robert S. Chavez
Humans have a seemingly unique capacity to reflect upon information about the self to form evaluative attitudes that influence their quality of life and predict mental health outcomes. While psychologists have devoted decades of research to the...
Dartmouth Dissertations

Results on minimizing closed geodesics / by Ian M. Adelstein
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...
Dartmouth Dissertations

Modeling geomagnetic storms on prompt and diffusive time scales / By Zhao Li
The discovery of the Van Allen radiation belts in the 1958 was the first major discovery of the Space Age. There are two belts of energetic particles. The inner belt is very stable, but the outer belt is extremely variable, especially during...
Dartmouth Dissertations

How we connect : neural mechanisms underpinning human social networks / by Carolyn M. Parkinson
One of the most distinctive aspects of humans as a species is our propensity to form complex social networks made up of intense, non-reproductive bonds with non-kin. Navigating these networks presents a considerable cognitive challenge that is...
Dartmouth Dissertations

Whistler chorus waves : linear theory and nonlinear simulations in dipole geometry / by Shuo Wu
Whistler-mode chorus waves have recently drawn tremendous attention as an important mechanism for controlling the energetic electron flux in Earth’s radiation belt. This dissertation aims to answer questions about whistler-mode chorus waves, such...
Dartmouth Dissertations

Measuring the seeds of thermal ion outflow / by Philip A. Fernandes
The ionosphere is the primary source for heavy ions which are ubiquitous in the terrestrial magnetosphere. Low-altitude energization in the auroral ionosphere results in bulk heating and transverse acceleration of ions, which begin to upwell and/or...
Dartmouth Dissertations

I. Reactivity of electron deficient indoles toward nucleophiles, Diels-Alder reactions and dipolar cycloadditions; II. Synthesis of pyrrolo[3,4-b]indoles.
Indole -- Synthesis. Indole -- Reactivity. Pyrroles. Diels-Alder reaction.
Earlier in our laboratory, a facile synthesis of the 2- and 3-nitroindoles was realized. These compounds showed promise as powerful intermediates in the synthesis of novel structures and natural products. The reactivity of 2- and 3-nitroindoles...
Dartmouth Dissertations

Quantitative analysis of EEG for the detection and localization of seizures in patients with medically refractory epilepsy.
Electroencephalography -- Data processing. ; Epilepsy -- Diagnosis. ; Signal processing -- Mathematics. ; Time-series analysis. ; Wavelets (Mathematics).
Visual interpretation of the EEG associated with an epileptic seizure (ictal EEG) can be cumbersome and sometimes misleading, due to rapid seizure spread, limited spatial resolution and the fact that signals of interest are often obscured by...
Dartmouth Dissertations

Spectrophotometry of HDE 226868 (Cygnus X-1).
X-ray astronomy. ; Astronomical photometry. ; Cygnus X-1.
Dartmouth Dissertations

The structure and chemistry of polar glacier ice.
Ice -- Analysis -- Polar regions. ; Glaciers -- Polar regions.
This dissertation explores the spatial and temporal distributions of impurities in natural ice. Using polarized light, ion chromatography (IC), synchrotron x-ray topography (SXT), scanning electron microscopy (SEM), and energy-dispersive...
Dartmouth Dissertations

Geology and paleomagnetics of three old red sandstone basins: Spitsbergen, Norway and Scotland.
Paleomagnetism -- Norway. ; Paleomagnetism -- Norway -- Spitsbergen Island. ; Paleomagnetism -- Scotland. ; Sandstone -- Norway. ; Sandstone -- Norway -- Spitsbergen Island. ; Sandstone -- Scotland.
Dartmouth Dissertations

Properties of Rathke's pouch.
Pituitary gland. ; Hypothalamus. ; Rats.
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

Individual differences in callosal organization: relationship to interhemispheric communication and hemispheric asymmetries.
Corpus callosum -- Physiology. Cerebral hemispheres. Laterality. Sensorimotor integration. Brain -- Localization of functions.
The overarching goal of the dissertation was to further understanding of the relationship between callosal organization, functional lateralization, and interhemispheric communication in the healthy, young adult brain. Three converging methodologies...
Dartmouth Dissertations

Radial diffusion of radiation belt electrons in three dimensions.
Van Allen radiation belts -- Mathematical models. Electrons -- Diffusion -- Mathematical models. Magnetohydrodynamic waves -- Mathematical models.
It is becoming increasingly important to understand the dynamics of radiation belt energetic particles given their potentially hazardous effects on satellites and our ever-increasing dependence on those satellites. There is a need to determine...
Dartmouth Dissertations

Intramembranous particle clusters and cytoplasmic vesicles in mice with nephrogenic defects of urinary concentration.
Diabetes -- Research. ; Mice as laboratory animals.
Dartmouth Dissertations

Identifying the biologically active forms of HEDGEHOG proteins.
Hedgehog (HH) proteins play an important and evolutionary conserved patterning role in metazoan development. Aside from this physiological role, pathologically HH proteins are implicated in human developmental disorders and post-developmental...
Dartmouth Dissertations

Neo-architectonics computer-aided histological examination of the human visual cortex.
Visual cortex -- Imaging. ; Visual cortex -- Histology. ; Image processing -- Digital techniques.
Functional neuroimaging has confirmed a high degree of localization of function in the cerebral cortex of man. In contrast, microstructural analysis has contributed very little to the topographical characterization of cortical areas. In this work I...
Dartmouth Dissertations

Expression of sporophytic and gametophytic storage proteins in the quillwort.
Lycopodiaceae -- Spores. ; Club mosses -- Spores. ; Generations Alternating.
Dartmouth Dissertations

Find results with:

Searching collections:

Add or remove other collections to your search:

Narrow your search by:

Title

Date

Subject

You've searched:

Thumbnail

Title

Subject

Description

Collection

QuickView

Layout options:

		Thumbnail with title
		Grid with smaller thumbnails and more detail

Find results with:

Searching collections:

Add or remove other collections to your search:

Narrow your search by:

Title

Date

Subject

You've searched:

Thumbnail Title Subject Description Collection

QuickView

Layout options:

Thumbnail

Title

Subject

Description

Collection