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 14 of 14 for “"pressure pulses"”.
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Investigation of drying conditions for dental practice loads
… temperatures while changing the ranges of the pressure pulses during the drying phase. The studies show that both cases result in the best drying quality with only 2 grams of water remaining on the pouches at the end of the cycle under the conditions where the pressure pulse ranges from 14 to …
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Pulse Propagation in Fluid-Filled Elastic Curved Tubes
… governing equations for the propagation of pressure pulses in an inviscid compressible fluid contained in a thin-walled naturally curved elastic tube is formulated. The method of characteristics is used to solve the pulse propagation problems. A second-order-accurate integration scheme is …
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A numerical study of the response of blast loaded thin circular plates, with both clamped and integral boundary conditions
… loading is implemented through short duration pressure pulses, while the use of a uniform initial velocity profile is also shown to give good results. An explicit time integration scheme is used for the dynamic structural response.
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Design and modeling of a PZT thin film based piezoelectric micromachined ultrasonic transducer (PMUT)
… of a thin plate, the PMUT transmits and receives pressure pulses to construct medical ultrasound images as an alternative to bulk piezoelectric transducers currently in use. Existing transducers are difficult to fabricate and lack the small scale necessary for small form factor, high resolution 2D …
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A computational and experimental study of the underwater implosion of single and multiple metallic spherical shells
Analysis of the implosion of pressure vessels in a deep-water environment is an important research area for the ocean engineering community. The majority of previous implosion research focused on the implosion of metallic cylinders, while the implosion behavior of volumes of different geometries …
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Patterns of Hemolymph Pressure Related to Tracheal Tube Collapse in the Beetle Pterostichus commutabulis
… impingement of trachea or by a difference of pressure gradients between the intra-tracheal air and the surrounding hemolymph. To determine the relationship between hemolymph pressure and tracheal tube collapse in the ground beetle (Pterostichus commutabulis), we performed direct measurements …
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Modeling of pore pressure propagation and dissipation in compressible porous media
… associated with the propagation of pore water pressure in high plasticity clays. Specifically, it addresses the pore pressure response in areas subjected to sudden increases in pore water pressure at their top boundary. The main applications of this research would be the study of pore pressure …
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PHOTOREFRACTIVE CRYSTAL-BASED ACOUSTO-OPTIC IMAGING IN THE NEAR-INFRARED AND ITS APPLICATIONS
… generated at two different ultrasound focal pressures. The resulting “pressure contrast signal” (PCS), once calibrated for a particular set of pressure pulses, yields a direct measure of the spatially averaged optical transport attenuation coefficient within the interaction volume between …
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On the electrohydrodynamics of drop extraction from a conductive liquid meniscus
… printing. Current drop-on-demand ink jets use pressure pulses to eject drops. Literature on electrostatic spraying suggests that by using an electric field, drops could be produced with a wider range of sizes and speeds than is possible with pressure ejection. Previous efforts to apply electric …
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Neural mechanisms of early motor control in the vocal behavior of juvenile songbirds
… in gap durations is formed by brief inspiratory pressure pulses, indicating an early involvement of HVC in coordinating singing with respiration. Using mild localized cooling - a manipulation that slows down biophysical processes in a targeted brain area - I found that the circuit dynamics …
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Axial variations and entry effects in a pressure screen
Pressure screens are used for contaminant removal and fibre length fractionation in the production of pulp and paper products. Axial variations and entry effects in the screen are known to occur and these variations have not been adequately quantified. This thesis describes a fundamental study of …
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Metal based reactive nanocomposites prepared by cryomilling
… higher combustion temperatures and stronger pressure pulses for applications in advanced munitions systems. Two applications are addressed in this work. In the applications for explosives designed to defeat stockpiles of chemical and biological weapons, it is of interest to develop …
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Turbínová skříň turbodmychadla VNT s oddělenými pulsy ve výfukovém potrubí
Tato diplomová práce se zabývá konstrukčním návrhem turbínové skříně turbodmychadla VNT pro přívod oddělených tlakových pulzů od výfukového potrubí. Následně práce obsahuje pevnostní kontrolu navržené turbínové skříně. Cílem práce je vytvoření komponentů pro přívod oddělených tlakových pulzů co …
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Transient Hydraulic Response of a Flowing Sodium System to a Sudden, Short Pressurization Event
Made available in DSpace on 2017-07-06T18:55:09Z (GMT). No. of bitstreams: 2 Lin_Anderson_MS.pdf: 28635413 bytes, checksum: 9d4600d9276e18b4339d8524cde8181b (MD5) license.txt: 4813 bytes, checksum: 715c4321821a960fa1a1e91d2ac7ebce (MD5) Previous issue date: 1980