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 237 for “"cross sectional area"”.
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Nerve Cross Sectional Area in Extremes of Height and Weight
Introduction: Cross-sectional nerve area reference values have been reported for many populations including pediatric, geriatric, and middle-aged, however few studies have investigated extremely tall and heavy individuals. Previous studies are conflicting; some suggest height and others weight as …
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Characterization of Arterial Flow for Junctional Bleeding Control
… by varying lengths of compression with constant cross-sectional area and varying cross-sectional area reduction with constant length in order to better understand how to control junctional hemorrhaging. The hypotheses of this study were that length reduction will have little effect on volumetric …
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A Computer-based, Quantitative Image Analysis Of The Geometry Of Human Cerebral Arterial Bifurcations
… data for each section included; diameters, cross-sectional area, centroid coordinates and perimeter.;All specimens exhibited a linear increase in luminal cross-sectional area as the point of branching was approached. The magnitude of the increase in cross-sectional area ranged from 50% to …
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Lateral and Posterior Dynamic Bending of the Mid-Shaft Femur: Fracture Risk Curves for the Adult Population
… was used to estimate risk functions. Femur cross-sectional area, area moment of inertia (I), maximum distance to the neutral axis (c), I/c, occupant gender, and occupant mass are shown to be significant predictors of fracture tolerance, while no significant difference is shown for loading …
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Predicting peak load of the femoral neck using structural parameters
… diameter, minor diameter, cortical thickness, cross sectional area, cortical area, and cortical fraction were measured and correlated to the peak compressive load. The highest significant correlation was found using major diameter (R2 = 0.6) or cross sectional area (R2 = 0.59). Significant …
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A Comparative Study of the Anterior Latissimus Dorsi Muscle Following Stretch in the Quail and Chicken
… this stretch, muscle mass, muscle fiber number, cross-sectional area, and muscle length were measured in quail (Cortunix japonica) and chicken (Gallus domesticus). Fiber number was determined by direct count after nitric acid digestion of non-muscle tissue. Calculations were then made for …
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Determination of Aortic Elasticity from MR- and CT- Images Using an Automatic Active Contour Model
… the relative temporal change in vessel cross-sectional area through the cardiac cycle or alternatively, the pulse-wave velocity has to be determined. In this work we determined the compliance via 3 MR methods (FLASH, TrueFISP and pulse-wave) and additionally CT. We developed an algorithm …
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Development of Methods for Characterizing Ankle Ligament Viscoelastic Properties
… novel approaches to: morphological length and cross-sectional area measurements, in situ pose maintenance during ligament extraction and testing, and automated mechanical testing. Additionally, preliminary ligaments are mechanically tested using an exhaustive battery to determine their strain …
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The effects of selected corn-soybean tillage systems on rill cross-sectional geometry and soil erosion for two Illinois soils
… objectives of this study were to quantify rill cross sectional geometry under different tillage, crop and soil conditions and to relate variations in rill geometric properties to measured sediment discharge and to soil erosion and sediment transport predicted by various models. In the …
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Contact stresses in conical shaped rollers
… the contact patch is smallest at the smallest cross-sectional area and largest at the largest cross-sectional area. Nevertheless, the stress magnitude is largest at the smallest cross-section and gradually decreases until it reaches the smallest stress value at the largest cross-section. The …
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Continuous and non-invasive blood pressure monitoring using ultrasonic methods
… ABP waveform estimation based on a vessel cross-sectional area measurement combined with the elastic property of an arterial vessel, represented by a pulse wave velocity (PWV). Several ultrasound techniques including uniform insonation and echo-tracking are explored to measure the PWV using …
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Evaluation of rootstock and crop load effects on the performance of `Gibson Golden Delicious' and three scab-resistant apple cultivars
… quality fruit and consistent apple production across growing seasons. The primary objective of this investigation was to evaluate the effect of rootstocks and cropping densities on fruit quality attributes and return bloom of `Gibson Golden Delicious' apples' and three apple scab-resistant …
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Muscle Loading Treatments for Achilles Tendinopathy
… tendons had a significantly increased cross-sectional area compared to naïve and all loading groups at 2 and 4 weeks. Maximum stress and elastic modulus of injured/untreated tendons were significantly lower compared to naïve and all loading groups after 4 weeks. Gastrocnemius muscle …
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A novel hypothesis for plant capacitance
… model. Capacitance correlated linearly with the cross-sectional area of root tissue at the solution surface, and inversely with distance between plant electrode and solution surface. A new model for capacitance was proposed and tested with cereal plants growing in solid substrates. Capacitances …
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Methods for modeling whole stem diameter growth and taper
… for modeling whole stem inside-bark diameter or cross-sectional area increment. Whole stem increment models were derived from several stem profile models and Presseler's hypothesis on the vertical distribution of cross-sectional area growth. Stem profile models evaluated for constructing …
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Stress-induced Damage and Post-fire Response of Aluminum Alloys
… Residual material strengths based on deformed cross sectional area after the creep test were calculated to provide insight into how microstructural damage affects the post-fire material performance. The competing effects of strength degradation caused by cavitation and strengthening due to …
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Optimization of tensegrity structures
… connectivity and geometric variables while the cross-sectional area and prestress forces variables are dealt with an internal sequential quadratic programming algorithm. The performance of this approach is evaluated on a typical cantilever configuration.
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Theoretical studies of lipid-protein interactions in biological membranes
… the average number of gauche rotations and the cross-sectional area of the lipids decrease with increasing density. There is no long range orientational order within the lipids but the local orieritational order increases with increasing density. No first order phase transitions are observed …
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Automated stenosis quantification in coronary arteriograms
… to be useful in estimating the diameter and cross-sectional area of coronary artery lesions. In this study, two different strategies are employed for identification of artery contours, i.e., scanning and tracKing The scanning approach is accomplished by a canny edge detector. The edge …
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