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 24 for “"Flow meters"”.
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Parental perception concerning the use of peak flow meters in the child with asthma
… parental perceptions concerning the use of peak flow meters (PFM) in their children. The sample consisted of 20 parents who were accessed through outpatient asthma allergy clinics. The questionnaire and semi-structured interview were utilized as tools and analyzed using inferential statistics and …
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Use Patterns and Influencing Factors of Irrigation Best Management Practices in the Lower Mississippi River Basin
… warped surface, and deep tillage), water flow control practices (computerized pipe-hole selection, multiple-inlet irrigation, surge irrigation, alternate wetting and drying, cutback irrigation, flow meters, and pump timers), water recovery/storage practices (tail-water recovery system and …
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Watershed-level Analysis of Urban Raingarden Performance
… gardens completed in June 2012. There are four flow meters to monitor the flow rate in the combined sewer. This analysis examines the watershed-level runoff response from the rain garden installation.
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Design of a Resistance-Based High Temperature Liquid Metal Flow Meter
Flow rate is a parameter that is vital to measure in high temperature pumped liquid metal systems, yet traditional flow meters are unable to perform at these extreme conditions. As a part of the Atomic Simulation & Energy (ASE) Research Group here at MIT, this research seeks to develop a flow meter …
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An Unsteady State Tracer Dilution Method for Characterizing Water Contributing Fractures in Crystalline Bedrock Wells
… of methods including downhole geophysics, flow meters, and straddle packers. These methods are expensive, time consuming, and can be logistically difficult to implement. This study demonstrates an unsteady state tracer method as a cost effective alternative for gathering fracture …
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On site measurements of kraft pulp pump system efficiency
… This involves the measurement of pump head, flow rate and power consumption. Provided that consistent flow measurements are available, it is possible to reliably and non-invasively measure actual pump system efficiencies in pulp suspension flow, with a minimum process disturbance. As part of …
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Point of Use Semi-Batch Reverse Osmosis Desalination Prototype Experimental Validation
… and current sensors, pressure sensors, and flow meters to facilitate autonomous operation; where this is characterized by automated switches between batch production and flush system states to dispose of an empirically derived flush volume based on a derived threshold system operating …
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Construction and testing of a respiratory apparatus for equine
… the expired gas out of the mask. A series of flow meters, pumps, drying columns and storage containers were connected to the mask. Aliquots of expired gases were taken and analyzed for carbon dioxide and oxygen content to determine RQ and to calculate heat production values. All values were …
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Non-invasive Method to Measure Energy Flow Rate in a Pipe
Current methods for measuring energy flow rate in a pipe use a variety of invasive sensors, including temperature sensors, turbine flow meters, and vortex shedding devices. These systems are costly to buy and install. A new approach that uses non-invasive sensors that are easy to install and less …
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A Novel Thermal Method for Pipe Flow Measurements Using a Non-invasive BTU Meter
… and non-invasive method that measures fluid flow rate and temperature in pipes. While current non-invasive flow meters are able to measure pipe flow rate, they cannot simultaneously measure the internal temperature of the fluid flow, which limits their widespread application. Moreover, …
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Quantification of left-to-right shunt through Patent Ductus Arteriosus by colour Doppler
… lambs, indomethacin acutely reduced the coronary flow by up to 50% and the effect lasted for up to one hour. In our lamb model, we developed a non-invasive method to quantify the ductal shunt by ultrasound. The flow was measured with electromagnetic flow meters in the ascending aorta and in the …
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Computer aided mathematical modelling of turbulent flow for orifice metering
… been used in the mathematical modelling of fluid flow for steady, incompressible non-cavitating, high Reynolds number turbulence through an orifice plate. The model developed for orifice plates was based on a particular closed form turbulent model: the k-ε two equation model developed at Imperial …
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Ultrasonic blood flow imaging using correlation processing
Thesis (Ph. D.)--Michigan State University. Dept. of Electrical Engineering and Systems Science, 1981
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Investigation factors contributing to the underperformance of Mbahela Irrigation Scheme that benefitted from the revitalisation of smallholder irrigation schemes programme
… Experimental data were collected using water flow meters. Water flow measurements were performed on the main and field canals. The canal network transmits water diverted from the Mutale River to the irrigation scheme. The water flow data were used to compute water losses using the …
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The use of biofiltration cells to filter contaminated water flowing from a slum settlement in South Africa
… cells were kept as control cells. Water that flows into each biofiltration cell is controlled via a network of valves. Flow meters were used to determine the volume and rate of discharge to each cell. The purpose of this study was to determine the effects of HLR (hydraulic loading rate) and …
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Exploring forest-water nexus in a changing environment of Kafue river basin, Zambia.
… determine tree age effects on ET and employ sap flow meters for species specific ET estimation. Collaboration among forestry and water institutions is necessary to enhance policy and management strategies.
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Exploring forest-water nexus in a changing environment of Kafue river basin, Zambia.
… determine tree age effects on ET and employ sap flow meters for species specific ET estimation. Collaboration among forestry and water institutions is necessary to enhance policy and management strategies.
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An investigation of the generation of acoustic emission from the flow of particulate solids in pipelines
The transport of particulate in a gas flow or pneumatic conveying system 1s widespread in many areas of industry, for example chemical, food processing, cement industries and transportation of pulverised coal in coal-fired power plants. However, a simple and reliable method for monitoring the flow …
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A virtual flow meter to develop velocity-index ratings and evaluate the effect of flow disturbances on these ratings
Stream flow records are typically estimated with the use of empirical rating curves. The conventional rating method relates stage to discharge, however at sites prone to flow reversals, changes in stream bed roughness, backwater, and tidal effects, a stage-discharge rating is not unique and a …
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