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 314 for “"Gravimetric"”.
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Validation of the NPL gravimetric hygrometer
The gravimetric hygrometer of the UK National Physical Laboratory (NPL) provides a first-principles realisation of mixing ratio - the most fundamental measure of the humidity of a gas. The operation of the NPL gravimetric hygrometer has been validated to demonstrate its satisfactory performance as …
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Gravimetric studies of certain Amphibian Organs under normal and experimental conditions
A cycle of seasonal ovarian weight changes in Xenopus is described, similar in all respects to that described by other workers.
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Seismic and gravimetric study of the Golden fault near Golden, Colorado, A
Includes bibliographical references (pages 49-51).
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Experimental and Computational Approaches to Enhance the Gravimetric Monitoring of Volcanic Areas
… this thesis is to improve the techniques of the gravimetric method, by enhancing the quality of discrete gravity measurements and separating the gravity signals provided by the gravimeters in continuous recording during paroxysmal events, in the gravity field component and the inertial …
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Design and Implementation of Mode Localised Resonant MEMS Oscillators for Gravimetric Sensing
… approach towards future sensor technologies for gravimetric sensing that could eventually be deployed as part of the emerging Internet-of-Things (IoT) paradigm. Furthermore, this thesis aims to examine the influence of “real-world” conditions during the field deployment of mode localised MEMS …
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Improving settleability and achieving biological phosphorus removal through the application of sidestream gravimetric selectors
This project utilizes hydrocyclones in wastewater treatment to select for heavier solids, and has been used before in multiple small-scale systems. This is the first implementation of hydrocyclones in a full-scale plant for the purpose of increased settleability, while also achieving enhanced …
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Gravimetric, neutron scattering and computational studies of the sorption and diffusion of gases in zeolites
Zeolites are a class of aluminosilicate materials with many important industrial applications as catalysts, ion exchange materials and sorbents. A novel dynamic Monte Carlo program has been written that allows both the kinetic and equilibrium properties of zeolitic systems such as CaNa zeolite A …
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A comparison of the least squares collocation and the fast Fourier transform methods for gravimetric geoid determination
… the fast Fourier transform (FFT) techniques for gravimetric geoid computation. The Land Levelling Datum (LLD) is the South African vertical datum based on more than 100 years old tide gauge measurements of mean sea level (MSL). The LLD is poorly defined so an alternative is required. The …
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DEGRADATION OF PROTECTIVE GLOVE MATERIALS EXPOSED TO COMMERCIAL PRODUCTS: A COMPARATIVE STUDY OF TENSILE STRENGTH AND GRAVIMETRIC ANALYSES
… techniques. The first technique involves gravimetric analysis of the weight change following constant immersion against the chemical mixture. The second method uses tensile strength to assess molecular changes in the polymer structure.</p> <p>This study is focused on addressing three …
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Acoustic resonators with integrated microfluidic channels for ultra-high Q-factor: a new paradigm for in-liquid gravimetric detection
… sensitivity and accuracy in terms of in-liquid gravimetric detection for biosensing applications. In this dissertation, we present a novel approach that eliminates nearly all dissipation and damping from sample liquids, rendering a significant improvement in Q-factor for in-liquid gravimetric …
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Particle Matter Measurements for Inspection/Maintenance Programs
… are currently measured by opacity or dynamometer gravimetric analysis. The Electronic Tailpipe Particle Sensor (ETaPS) is an inexpensive measurement device purported to give real time response to particle mass and was proposed as a possible addition to Inspection/Maintenance (I/M) programs. There …
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Characterisation of silicalite and post synthesis modified silicalite using adsorption
… This adsorption apparatus was based upon the gravimetric technique due to the reliability, high sensitivity and the widespread use of this type of technique. The system constructed was a flow system as opposed to the more commonly used vacuum system. The choice of a flow gravimetric system …
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Assessment of Ambient Air Particulate Matter in the New Orleans Historic District
… less than 2.5 micron in size) were quantified by gravimetric analysis using an Andersen Dichotomous Sampler (Series 240). Posterior to gravimetric analysis, the filters were analyzed with a fluorescent test method using an Innov-X Portable XRF Analyzer (Model A-6500). This study demonstrated that …
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Moisture stress conditioning, potassium nutrition, and tolerance of Salvia splendens 'Bonfire' to moisture stress
… (E), leaf conductance (g₁), and daily gravimetric water loss during well watered conditions. Greatest shoot dry weight occurred for plants grown with 300 ppm K and no-MSC. Gas exchange of salvia as influenced by MSC during the onset of moisture stress was determined in experiment two. …
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Fundamental understanding and materials design approaches for lithium-oxygen electrochemical energy storage
… Li-air batteries with a theoretical cell-level gravimetric energy up to 4 times higher than Li-ion batteries. First, we study the charge storage mechanisms in oxygen-functionalized multiwalled carbon nanotube (MWNT) positive electrodes for high-power Li batteries. Thin-film (below 3 im) …
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Acoustic sounding of snow water equivalent
… Park, British Columbia. Data collected by gravimetric sampling was used as comparison for the SWE values determined by acoustic sounding. The results are encouraging and suggest that this procedure is similar in accuracy to SWE data collected using gravimetric sampling. Further research is …
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Development and Use of Moisture-Suction Relationships for Geosynthetic Clay Liners
… processes and drying processes in terms of gravimetric moisture content and volumetric moisture content.</p> <p>The effects of GCL type, hydration solution, wet-dry cycles, and temperature on the moisture-suction relationships were analyzed. The three GCLs of the test program consisted of …
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