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 13 of 13 for “"visual estimation"”.
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Habitat models for predicting the occurrence of blotchside logperch (Percina burtoni) and tangerine darters (P. aurantiaca) in the North Fork Holston River and Little River, Virginia
Basin-wide visual estimation techniques developed in the Pacific Northwest for small streams were modified to survey about 180 river kilometers (rkm) of the North Fork Holston River and about 16 rkm of lower Little River (Clinch River tributary) in southwestern Virginia during the summer of 1992 …
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Estimating forage mass of tall fescue pastures and dry matter intake and digestibility of fescue forage by beef steers
… meter (PCM), the plate meter (PPM), and the visual estimation (VE). The coefficients of determination from the calibration equations were 0.686, 0.751, and 0.862 for the PCM, PPM, and VE, respectively. There were differences in forage mass estimates due to sampling method, sampling date, and …
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State and Dynamics Estimation in an Outdoor Multi-Drone Slung Load System
… real world platform for testing load pose estimation methods. A novel cable-based testing apparatus that enables drone translation is used to facilitate stability testing of a quasi-static formation control method for lifting a slung load. This work aims to be the first to use visual …
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Response of brook char (Salvelinus fontinalis) and blacknose dace (Rhinichthys atratulus) to acidic episodes in three headwater streams within the Shenandoah National Park, Virginia
Basinwide visual estimation techniques were used to inventory habitat and fish populations in three Shenandoah National Park watersheds having low, moderate, and high acid neutralizing capacity (ANC) to determine: a) types, distribution, and total amount of habitat; b) community structure and …
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Automatic trajectory generation for mobile-manipulators using 3D LiDAR scans of unknown surfaces
… radon gas. Proper application of shotcrete and visual estimation of its thickness require highly skilled operators. This research presents a trajectory generation algorithm that is capable of autonomously applying shotcrete to unknown surface geometries. The trajectory generation algorithm can …
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Influence of Caloric Distribution on Weight Loss
… was followed to determine the portion size. A visual estimation of the amount of each serving of food left on the tray was made by the licensed vocational nurse in charge of the patient and recorded following each meal. This provided an accurate count of the actual caloric intake daily.</p> …
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Multiple-scale habitat models of benthic fish abundance in riffles
This dissertation examines the relationship between abundances of Roanoke darter, Roanoke logperch, and black jump rock and availability of stream habitat features at three spatial scales in two reaches of the Roanoke River, Virginia. The utility of underwater observation as a method of estimating …
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Modelling grey-level intensities for smart phones to view medical images
… of CIECAM16 correlates the best with observers’ estimations. Then experiments on visual estimation are carried out to match the original x-ray chest images with COVID19 displayed on the LCD with those displayed on a phone before and after enhancement. The results show that the enhanced images by …
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Improving Soil Moisture Assessment of Turfgrass Systems Utilizing Field Radiometry
… the strongest relationship to VWC (r = 0.62) and visual estimations of wilt (r = -0.91) compared to the green-to-red ratio index (GRI) or NDVI. Parameters associated with non-linear regression were analyzed to compare grasses, soils, indices, and their interactions. The WBI and GRI compared …
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Development of supervised and unsupervised pixel-based classification methods for medical image segmentation
… grading and ER status assessment is based on the visual evaluation of breast tissue specimens under the microscope. More specifically, grading is determined on the visual estimation of certain histological features, on H&E (Hematoxylin & Eosin) stained specimens according to the World Health …
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Using GIS To Evaluate The Kentucky Wetland Rapid Assessment Method
… would be more accurate than those results from visual estimation based on manual methods using the same spatial data. The GIS solution relies on spatial data and therefore is limited by those data in terms of availability and quality. When used in conjunction with ground-truthing during the …
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Recovery From and Effects of a Catastrophic Flood and Debris Flow on the Brook Trout (<i>Salvelinus fontinalis</i>) Population and Instream Habitat of the Staunton River, Shenandoah National Park, VA
… much higher peak than during summer. Basin-wide visual estimation technique (BVET) fish population surveys performed each spring and fall from 1993 = 1999 provided pre- and post-event fish population abundance and density estimates. Post-event fish growth in the debris flow affected and …
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Validation of first pass magnetic resonance myocardial perfusion imaging using fractional flow reserve
… SPECT. Invasive comparisons have been made with visual coronary angiography and quantitative coronary angiography (QCA). This previous work has been summarised in a meta-analysis which estimated the sensitivity and specificity to be 84% and 85% respectively. The majority of previous studies have …