Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 135 for “"Morphometry"”.
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Geometrical Models for 2D Morphometry in Bioimages
… therefore excellent alternative candidates for morphometry. The extraction of this kind of contour representation from bioimages is however tedious and poorly scalable. In this thesis, we investigate how deep learning can be leveraged to infer geometrical models directly from bioimages. We …
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Characterization of crater morphometry on the Moon and Mercury from altimetry observations
… from laser altimeters are used to assess the morphometry of impact craters. Data acquired by the Mercury Laser Altimeter on the MESSENGER spacecraft are used to measure the depths and diameters of 537 craters at the high northern latitudes on Mercury, including 42 polar-deposit-hosting craters …
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Structure, function and context : the impact of morphometry and ecology on olfactory sensitivity
In this thesis, the relationships of olfactory sensitivity to three biological variables were tested. The sensitivity of a marine mammal, the sea otter (Enhydra lutris) was measured in order to determine whether a marine lifestyle results in impaired olfaction. The effect of dietary relevance on …
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Neuroanatomical differences in adults and children who stutter: a voxel-based morphometry study
… groups were analyzed separately with voxel-based morphometry (VBM), an unbiased, whole-brain based volumetric technique. Adult group comparisons consisted of adults who stutter (n=12) versus adult controls (n=25), and pediatric group comparisons included recovered children (n=7); children with …
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Structure, function and context : the impact of morphometry and ecology on olfactory sensitivity
In this thesis, the relationships of olfactory sensitivity to three biological variables were tested. The sensitivity of a marine mammal, the sea otter (Enhydra lutris) was measured in order to determine whether a marine lifestyle results in impaired olfaction. The effect of dietary relevance on …
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INTERRELATIONSHIPS BETWEEN MACULAR CAROTENOIDS, RETINAL MORPHOMETRY, AND COGNITIVE FUNCTION IN PERSONS WITH MULTIPLE SCLEROSIS
… of neuroaxonal degeneration, such as retinal morphometry, have not been examined among persons with MS. Specifically, the research presented herein aimed to explore the implications of macular and serum xanthophyll status for markers of retinal morphometry, and the associations between macular …
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Biological and bio-inspired morphometry as a route to tunable and enhanced materials design
… classical materials selection rules with morphometry (geometry or shape-based rules) to create high-performance, multi-functional structures that exhibit tunable properties through extraordinary complexity, hierarchy, and precise structural control. This thesis explores the use of …
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Investigation of regional variation in Lunar crater morphometry from (Lunar Orbiter Laser Altimeter) LOLA observations
… allowed for a quantitative assessment of crater morphometry. 351 simple and complex craters in the Mare Serenitatis, far side highlands, near side highlands, and South Pole-Aitken basin are decomposed into 50 elevation profiles, from which key geometric crater properties are extracted. The …
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Digital Morphometry : A Taxonomy Of Morphological Filters And Feature Parameters With Application To Alzheimer's Disease Research
In this thesis the expression digital morphometry collectively describes all those procedures used to obtain quantitative measurements of objects within a two-dimensional digital image. Quantitative measurement is a two-step process: the application of geometrical transformations to extract the …
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Quantitative Assessment of Lung Microstructure in Healthy Mice Using an MR-based 3He Lung Morphometry Technique
… laboratory the MRI-based technique - 3He Lung Morphometry - is a unique tool allowing in vivo measurements of lung microstructural parameters such as alveolar volume, surface-to-volume ratio and alveolar density. These parameters are commonly used by lung physiologists and pathologists but were …
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Validation of DARTEL registration technique. Application to Mild Cognitive Impairment and Schizophrenia using Voxel Based Morphometry
This research analyzes anatomic variability of brain structures due to Mild Cognitive Impairment and Schizophrenia. This information is coded by spatial transformation between Resonance Magnetic image and a template selected as anatomic reference. To get this information efficiently, DARTEL …
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Localizing longitudinal changes in volumetric bone mineral density after acute knee injury using voxel-based morphometry
… capture bone mineral density (BMD). Voxelbased morphometry (VBM) can provide a comprehensive assessment of the entire bone structure through voxel-by-voxel comparisons, revealing both spatial and temporal patterns in BMD changes. The aim of this thesis was to develop and implement a voxel-wise …
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The role of cortical morphometry of functional networks in predicting age-related cognition in older adults
… the nature of the relationships between cortical morphometry, cognition, and age in older adults through a contemporary neuroscience lens of the brain as a system of functional networks. In chapter one, I employ a widely-used functional network architecture as the organizing principle of the …
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Brain morphometry of HIV-infected children on early antiretroviral therapy (ART) from age 5 to 9 years
… severity at ART initiation affect cortical morphometry development at age 5 years in a perinatally infected, early-treated pediatric cohort. However, on continued ART the cortical developmental trajectory is no different from that of uninfected controls. Any structural defects resulting from …
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A Comparison of Adult and Sub-Adult Walleye Movements and Distribution in Lakes Having Simple and Complex Morphometry
… at Lake Enemy Swim which likely relates to lake morphometry. Differences in diel movement rates were more apparent at Lake Enemy Swim. A general trend of least movement during the day and greatest movement during crepuscular and nighttime periods was observed. Seasonal changes in location depths …
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Population Demographics of Cougars in the Black Hills: Survival, Dispersal, Morphometry, Genetic Structure, and Associated Interactions with Density Dependence
The cougar (Puma concolor) is the remnant apex predator of South Dakota. Cougars were extirpated from the majority of the Dakotas by the early 1900s, and severely reduced or extirpated from the Black Hills of South Dakota and Wyoming during this same time. Many factors led to the demise of cougars …
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Body composition of dogs determined by carcass composition analysis, deuterium oxide dilution, subjective and objective morphometry, and bioelectrical impedance
… oxide dilution, subjective and objective morphometry, bioelectrical impedance and ultrasound, either separately or in various combinations. Carcass composition determined by chemical analyses of carcass homogenates served as criterion measures of body composition. Dogs were selected based …
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Three dimensional water quality modeling in a shallow lake with complex morphometry; implications for coolwater fish habitat under changing climate
Morphologically complex lakes usually have a significant water quality heterogeneity and hydrodynamic gradients that require a three dimensional (3D) model to accurately capture their temporal and spatial dynamics. The objectives of this research were to evaluate and apply a 3D coupled hydrodynamic …
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Linking environmental variation across the Scottish Highlands with red deer (Cervus elaphus) trace element status, parasite burden, and skeletal morphometry
The performance and health of managed game species is important to remote and rural economies. Wild red deer (Cervus elaphus) in the Scottish Highlands have long been recognised as occupying a sub-optimal (i.e., limiting) environment in terms of nutrition and shelter. Despite this wide recognition, …
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