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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 15 of 15 for “"pressure plate"”.
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Moisture transport and fixation in porous materials at high moisture levels
… suction is plotted against moisture content. The pressure plate and pressure membrane technique is often used to measure water retention curves. There are, however, various ways of carrying out such measurements. This paper compares two different methods of presaturating the specimens before …
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Moisture conditions in rain exposed wood joints - Experimental methods and laboratory measurements
… A method for absorption experiments based on the pressure plate technique was therefore developed. Measurements were performed at one pressure level for Norway spruce sapwood and the results were compared to results from absorption experiments at lower relative humidity levels as well as a …
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Development and validation of an Active Grille Shutter testing platform
… in wind tunnels. Additionally, a generic pressure plate is designed to mimic commercial radiators, and a testing procedure is developed for AGS testing. Together, they provide a comprehensive and consistent platform for AGS testing with or without the radiator in a wind tunnel. The …
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Characterizing and modeling the hydrologic properties of coal combustion by-products in landfills
… curves were developed from hanging column tests, pressure plate tests, dew point potentiometer measurements and relative humidity measurements. Hydraulic properties were measured at various densities to simulate a range of conditions expected in the deep disposal pits. The measured hydraulic …
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Identification of the biomechanical performance determining factors of the 5 iron golf swing when hitting for maximum distance
… UK), Pro V Swing Analyser (Golftek, USA) and a pressure plate (100 Hz) (RSscan Lab Ltd., UK). Participants were divided into two groups, based on their ball launch speed (high vs. low). Those in the high ball speed group were deemed to be the more skillful group. Statistical analysis was used to …
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Control of the irrigation water resources of the Al-Hasa oasis
… The thesis shows that the widely used pressure plate (for laboratory evaluations) is less accurate than is the simpler filter paper system. Such laboratory determinations will be needed to ensure that the chosen field instruments are as accurate as is wanted. An interesting, and still …
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A laser plantar pressure sensor for the diabetic foot
… concerned with the design and building of a foot pressure system capable of measuring the pressure distribution underneath the diabetic foot. The system is developed to have a higher resolution and be more cost-effective than existing commercial systems.<br/><br/>The biomechanics of the foot and …
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Evaluation and Laboratory Measurement of the Coefficient of Permeability in Deformable, Unsaturated Soils
… void ratios under different consolidation pressures. Another twelve specimens were placed in a pressure plate cell in order to define the soil-water characteristic behavior for the drying process starting at different initial void ratios. The experimental data, along with available data for …
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Infiltration Models for Engineered Media in Living Roofs and Bioretention
… or falling head experiments for Ks, tension plate combined with pressure plate methods for WRC, and an instantaneous profile combined with steady state, steady-rate methods for K(θ). Based on well fitted WRC functions, namely the van Genuchten and Durner functions, continuous uni- and bimodal …
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Development and Use of Moisture-Suction Relationships for Geosynthetic Clay Liners
… were determined by combining suction data from pressure plate tests, contact filter paper tests, and relative humidity tests, then fitting water retention curves (WRCs) to the data. WRCs were determined for wetting processes and drying processes in terms of gravimetric moisture content and …
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Soil Moisture Measurements and Modeling at a Geomorphically Reclaimed Coal Mine in New Mexico
… from falling head tests, hanging column tests, pressure plate tests, and dew point potentiometer measurements. In addition, hydraulic properties were estimated from field tension infiltrometer tests. Laboratory and field tests accounted for the variable soil density in the near surface. Periodic …
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Experimental studies of sorption and transport of moisture in cement based materials with supplementary cementitious materials
… using the sorption balance method, and the pressure plate method. The conclusion from this part of the study was that the desorption isotherms at low RH (0-30%) for different binders and different w/b-ratios are similar. At higher RHs the samples with silica fume and slag have higher …
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Assessment of the impact of climate change on an instrumented embankment: an unsaturated soil mechanics approach
… psychrometer, high capacity suction probe and pressure plate). Total and matric suction SWRC following primary drying paths from 25% of water content were determined. In addition, a series of tests with the filter paper on samples at lower water contents (15%, 20% and 22%) was also performed. …
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Soilless Substrate Hydrology and Subsequent Impacts on Plant-Water Relations of Containerized Crops
… between -10 and -800 hPa than traditional pressure plate measurements. Soilless substrates were engineered, utilizing only three common substrate components [stabilized pine bark (Pinus taedea L.), Sphagnum peatmoss, and coconut coir fiber], via particle fractionation and fibrous additions. …
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The Impact of a Planar Drainage Geocomposite in Unsaturated Soil
… look for improved methods to reduce pressures and divert water from foundations, mechanically stabilized earth structures, cover systems, and other civil infrastructure. Drainage in these structures has typically been achieved with engineered fills, often combined with geosynthetics, …