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 96 for “"Air pressure"”.
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Dissolved air (pressure) flotation
… solids removal and thickening by dissolved-air (pressure) flotation and the criteria pertaining to the design of flotation tanks for solids removal and thickening. A review of pertinent literature on flotation is presented. The historical development of flotation is given together with the …
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A microprocessor based air pressure controller
A microprocessor based air pressure controller is discussed. The particular implementation was designed around an existing pressure measurement, and display unit. The unit is controlled by a 6809 microprocessor. It is shown that due to the many functions that the unit must perform and control, a …
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A Study of Low Head Hydropower Using a Siphon System and Conversion to Air Pressure.
… available at low head (2m) hydro sites into an air flow that could be used to generate electricity. After giving a rationale for the uses of this design at the many available sites in the U.K., a brief history of the development of water power and of the more recent research into this process is …
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The effect of varying lung volume on intraoral air pressure and air flow rate : a report of three experiments
Thesis (M.A.)--Michigan State University. Dept. of Audiology and Speech Sciences, 1975
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Wax distribution quantification using digital image analysis techniques
… the wax emulsion flow rate and application pressure had a significant affect on wax coverage. A lower amount of flake surface area was covered when the flow rate and air pressure was increased. It was also found that the presence of resin on the flakes affected wax coverage. Resin presence …
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Long-term climate variability at the Prince Edward Islands in the Southern Ocean
… such as sea surface temperature (SST), air temperature, sunshine, rainfall, air sea level pressure and wind speed and direction from the 1950s to the early 2000s, the aim of this study is to update those studies to a more recent time with updated time series. Among the changes recorded …
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Speech Aerodynamics of American English and Japanese Speakers
The speech aerodynamics of estimated subglottal air pressure, laryngeal air flow, laryngeal airway resistance, and volume of air expired per syllable were compared across group and across gender for seven American English speakers and seven Japanese speakers. Estimated subglottal air pressure, …
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Seasonal air and water mass redistribution and its effect on satellite and polar motion
… observed polar motion. It is hypothesized that air and ocean mass redistribution is the primary source of seasonal perturbations in satellite motion, and that wind-driven ocean mass redistribution is a major source for polar motion excitation. Average monthly variations in zonal spherical …
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Radonexpositionen im Innenraum und deren gesundheitliche Bedeutung für den Menschen : eine Literaturübersicht anhand der 'Proceedings of Indoor Air' von 1978 bis 2005
… there are International Conferences on Indoor Air Quality and Climate and the results of these conferences are written down in so called Proceedings. So far it is not clear whether or not there are informations about radon and its indoors exposure as well as its effects on human health in these …
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Theoretical analysis of bump and airblast events associated with coal mining under strong roofs
… was conducted to study the bump and airblast problems associated with delayed caving of competent longwall roofs. The roofs were modeled as elastic beams on continuous elastic foundations subject to exponentially distributed abutment stress. Elastic beam theory was applied to develop …
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Investigation of cutting temperature and cutting force from mist flow pattern in MQL technique
… spray cone angle supplied under 0.4 MPa input air pressure. The results obtained from the machining process shows a significant reduction of cutting force and cutting temperature at the nozzle distance in the range of 6 to 9 mm under 0.4 MPa input air pressure for larger diameter OD30 nozzle.
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Optimisation of granola breakfast cereal manufacturing process by wet granulation and pneumatic conveying
… bed granulation process the effect of nozzle air pressure and binder spray rate on key aggregate quality attributes were studied. The experimental results show that a decrease in nozzle air pressure leads to larger in mean granule size. The combination of lowest nozzle air pressure and lowest …
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Effect of liquid properties (water and lime juice) on spray characteristics of deflected flat spray nozzle (AL-75)
… The main factor that influences the spray is pressure of the liquid and air, type of nozzle, type of spray and the viscosity of the liquid. The problem in this research is to determine minimum liquid pressure used for atomization. This study is on characteristic with different ratio of liquid …
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Determination Of Optimum Polymer Dose For Grand Forks Wastewater Treatment Plant Lagoon Sludge Dewatering
… Two bench top tests- Time to filter (TTF) and Air Pressure Cell Test were performed for determining the best usable polymer and optimum polymer dose. Polymers of four cationic concentrations(C 6210, C 6237, C 6257 and C 6285) were used as polymer samples. Sludge samples were collected from the …
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Analysis of the pressure-wall interaction at the release of a stop closure
… tip, or the tongue body, is raised to make an airtight closure. Stevens [I] pp 32 9-3 30 hypothesized that the interaction of the air pressure with the yielding soft-tissue wall would lead to a plateau-shaped release trajectory, and the duration of the plateau is progressively longer for …
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Optimization of the glass fiber forming process for single-tip and small-number-tip positions
… this project was put into controlling glass head pressure. On the full-scale system constant glass depth is maintained and the glass weight controls the flow rate of glass through the fiber forming tips. On the small system flow rate is controlled by a combination of changing glass weight and …
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An analysis of differences in glass cartridge siliconization parameters and processes for manufacturing of pharmaceutical cartridges
… procedures, heating time, standing time, air pressure of silicone blowout, and silicone concentration. Results from these experiments showed that some production processes have a greater effect than others on silicone layer thickness and subsequent gliding forces. Differences in cleaning …
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Design of experimental setup for identification of parameters for optimal aerosolization of measles vaccine
… solution pH, surface tension, viscosity, air pressure, and nebulizer geometry. Relevant post-aerosolization parameters are identified particle size distribution, aerosolization endurance and bioavailability, and drug delivery rate. Sensing, actuation, automation and special concerns for …
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A novel continuous pitch electronic wind instrument controller
… of linear position, magnetic reed, and air pressure sensors to generate three fully continuous control dimensions. Each control dimension is encoded and transmitted using the industry standard MIDI protocol to allow the instrument to interface with a large variety of synthesizers to …
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