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 19 of 19 for “"pressure release"”.
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The effect of manual pressure release on myofascial trigger points in the upper trapezius muscle
Sustained manual pressure has been advocated as effective treatment for myofascial trigger points (MTrPs). This study aimed to investigate the effect of manual pressure release (MPR) on the pressure sensitivity of MTrPs in the upper tapezius muscle using a novel pressure algometer. Asymptomatic …
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Investigation of a radially vibrating, oil filled cylindrical ceramic transducer with a variable internal impedance and devoid of all forms of pressure release
… ceramic transducer devoid of all forms of pressure release provides a means of transmitting sound at unlimited depths. A study was made of the admittance characteristics in the vicinity of resonance of a transducer of this type, which was constructed with a variable acoustic impedance in …
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A comparison of two computer models of sound propagation for a wedge shaped ocean over a penetrable bottom
The problem of determining the acoustic pressure in a wedge shaped wave guide is examined. Two computer models, one using the method of images, the other using coupled normal modes, are compared. This comparison is over the benchmark wedge of the Acoustic Society of America. Three scenarios were …
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Motions in myoglobin
… are necessary for the protein to function. Pressure release and flash photolysis experiments help characterize some of these protein motions. Sperm whale carbonmonoxymyoglobin exhibits three spectroscopically distinguishable carbon monoxide stretch bands between 1910 cm-1 and 1990 cm-1 …
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Motions in myoglobin
… are necessary for the protein to function. Pressure release and flash photolysis experiments help characterize some of these protein motions.
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High pressure diffraction studies of gallosilicate natrolite: applications to pressure-induced cation trapping
… of zeolites undergoes volume expansion under pressure. Natrolite itself is a three dimensionally porous zeolite with 8-ring channels. It shows an unusual unit cell volume expansion when under hydrostatic pressure where it undergoes two distinct, reversible phase transitions to paranatrolite …
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A numerical method for solving for normal modes with impedance bottom
… of boundary conditions. At the surface perfect pressure release is assumed, and the boundary condition at the bottom is one of impedance mismatch. An effort was made to develop a Fast Field Program, which would use a FFT to predict propagation loss at a variety of ranges by solving for a …
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Design and evaluation of a pulsating flow wind tunnel
… range of 3.4 to 31.3 Hz. The velocity and pressure waveforms are given for different shutters settings and conditions. It was found that the velocity waveform shape and amplitude, obtained in the test section, are a strong function of pressure build-up in the diffuser upstream of the …
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Preliminary investigation of the effect of surface fluctuations on sound amplitude in guide mode propagation.
… 237 cm x 117 cm x 9 cm water-filled cavity with pressure-release walls was excited in a normal mode by a source placed in one corner. The resulting acoustic signal was monitored at various locations throughout the cavity with a small probe receiver. Wind-driven surface waves were generated by a …
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Conformational relaxation in heme proteins: Ligand rebinding above the glass transition
… relaxations observed in MbCO upon a sudden pressure release, the relaxation of all barriers to higher enthalpy is nonexponential in time and does not obey an Arrhenius relation. The extent of the enthalpic shift is consistent with a prediction based upon the inhomogeneous rebinding of band …
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Formulation and stability of model food foam microstructures
… leads to its expansion due to the reduced air pressures. The product can spoil in transit. Further instabilities arise when extruded from a freezer. This instability was studied extensively in this work. It was seen that larger drops in pressure and at a slower rate were more detrimental to the …
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The engineering geology and stability of the rapidly alternating limestone and mudrock sea cliffs of glamorgan
… and temperature movements, freeze-thaw and pressure release all act to impair stability. Extreme weather was shown to trigger failure. <br/>Limiting equilibrium analyses of toppling showed that torsional shear strength mobilized along the failure surface in the plane of toppling contributed …
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Conformational relaxation in heme proteins : ligand rebinding above the glass transition
… relaxations observed in MbCO upon a sudden pressure release, the relaxation of all barriers to higher enthalpy is nonexponential in time and does not obey an Arrhenius relation. The extent of the enthalpic shift is consistent with a prediction based upon the inhomogeneous rebinding of band …
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Aspects of transformation behaviour in olivines, pyroxenes and titanomagnetites
… aggregate, produced from the majorite upon the release of pressure. Similarly the spinel polymorph of olivine, has subsequently inverted to the B-phase polymorph, on pressure release. The mechanisms for high-pressure, high-strain rate transformations, and their implications to shock experiments, …
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Feasibility study of a hybrid passive/active noise absorption system
… minimizing the reflected wave, (ii) inducing a pressure-release boundary condition on the back surface of the absorbing layer and (iii) a new approach consisting of minimizing the reflected wave in the airspace. The latter results in a match between the impedance in the air cavity and the …
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Benign Processing of High Performance Polymeric Foams of Poly(arylene ether sulfone)
… to a temperature of 220 oC and 10.3 MPa of pressure. Under these conditions, a combination of 7.5% of water and scCO2 were able to diffuse into the PAES specimen, correlating to ~60 oC reduction in the Tg of the PAES. The combination of water and scCO2 produced foam with up to an 80% …
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Multi-static scattering of targets and rough interfaces in ocean waveguides
… As the target models, a rigid sphere, a pressure-release sphere, and a finite cylindrical elastic shell have been used. A scattering theory of finite cylindrical elastic shells has been chosen to investigate the 3-D effects caused by an aspect-dependent object. The plane wave scattering …
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Development and initial evaluation of wireless self-monitoring pneumatic compression sleeves for preventing deep vein thrombosis in surgical patients
… de-vices that typically include automatic pressure controllers and pneumatic compression sleeves have been reported. For example, one study reported a high percentage of improperly applied or nonfunctional pneumatic compression devices in routine usage. Technical problems, non-compliance, …