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 597 for “"OSCILLATING"”.
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Oscillating heat pipes : study of their oscillating motion using neutron imaging and application
… various applications in science and industry. Oscillating heat pipes (OHP) are being studied as a higher performance way of cooling high power electronics. The oscillating motion of the liquid in an OHP has a significant role in the performance. However, the fluid dynamics in an OHP are very …
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Self-Oscillating Unified Linearizing Modulator
… on the input voltage. In the thesis work, a self-oscillating unified linearizing modulator is introduced. It first provides a unified procedure to establish a large-signal control-to-output linearity for different pulse-width modulation dc-dc converters. Feedforward is employed to mitigate the …
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Chemomechanics of self-oscillating gels
… of chemical signals. In this thesis, self-oscillating polymer gels comprising N-isopropylacrylamideco- Ru(bpy) 3 are synthesized in order to elucidate chemical and mechanical (chemomechanical) coupling in synthetic, stimuli-responsive materials, and to design mechanically induced, …
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Material transport on oscillating conveyors.
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1967.
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A micromechanical silicon oscillating accelerometer
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1997.
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Aerodynamic stability of oscillating bridges
… was to observe the action of the various models oscillating torsionally in a fluid stream of uniform velocity. From static tests and pressure distribution examinations predictions of vertical and torsional stability trends have been made and approximate aerodynamic constants evaluated. …
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LUBRICATION STUDY OF AN OSCILLATING BEARING
… journal studied was a hardened steel member oscillating through 30 , at various loads and speeds in a hardened steel bushing. From the results it was concluded that there were possibly four regimes of operation. The coefficient of friction with constant load and increasing speed was found to …
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Sensitivity analysis of oscillating hybrid systems
… dynamics. These systems are called oscillating hybrid systems and find applications in diverse areas of science and engineering, including robotics, power systems, systems biology, and so on. A useful tool that can provide valuable insights into the influence of parameters on the …
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Bloch-oscillating Electrons in Moiré Superlattices
… scheme based on coupling the Bloch-oscillating electrons to an oscillator mode in a THz resonator. We also discuss Bloch oscillations in the presence of a magnetic field. The competition between Bloch oscillations and the cyclotron motion of electrons gives rise to interesting …
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Oscillating Energy Harvester for UUV Applications
… design, modeling, and optimization of a novel oscillating energy harvester for use in a Bluefin-21 UUV. Real-world vessel acceleration data was used to optimize the harvester for four different potential energy profile configurations: free-floating, linear monostable, nonlinear monostable, and …
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Oscillating Aqueous Gels as Drug Delivery Systems
… drug delivery systems. They possess a unique oscillating property that was evaluated as a means of controlling drug release dependent upon intentional structural modifications of the systems.Based on the phase behavior of various quaternary compositions of nonionic surfactant and cosurfactant …
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Heterogeneous catalyzed macromolecular hydrogenations in oscillating systems
… species (α-methylstyrene) (AMS) in a piston oscillating monolith reactor (POMR), oscillations gave improvements in reaction rate of up to 84%. With no oscillations, the activity was still higher than in a stirred tank operated at an equivalent power per unit volume. Selectivity in the POMR …
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Mass Transfer Characteristics of Large Oscillating Drops
… related to mass transfer of solute from large, oscillating drops in liquid-liquid systems has been critically reviewed. A thermostatically-controlled spray column, provided with mirrors, was used to study the hydrodynamics and mass transfer characteristics of single large oscillating drops and …
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The Cape rapidly oscillating Ap star survey
This thesis describes a survey, the Cape Survey, which was started with the intention of discovering more roAp stars suitable for asteroseismological studies and also to identify the limits of the roAp phenomenon in temperature and luminosity. This is the most extensive survey of the roAp …
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Settling of spheres in an oscillating fluid
Thesis: B.S., Massachusetts Institute of Technology, Department of Civil and Sanitary Engineering, 1961
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Vortex-induced forces on oscillating bluff cylinders
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1993.
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The tangential drag of an axially oscillating cylinder
… of the tangentiaì drag of an axially oscillating cylinder is presented. Deep-sea mooring cables are oscillated sinusoidally at ocean wave amplitudes and frequencies, and experimenta1 values of the tangential (friction) drag coefficient are obtained. The experimental values of the drag …
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Heat Transfer to Arrays of Oscillating Impingement Jets
<p>In gas turbine engines, the desire to increase turbine entry temperatures has become more relevant in order to increase engine efficiency. However, materials used in these engines can only withstand temperatures that are so high. Because of this, the ability to cool hot section components will …
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Oscillating Heat Pipe Performance with Evaporator Section Modifications
… the capability to meet this growing need is the oscillating heat pipe. Oscillating heat pipes (OHPs) are passive, two-phase cooling devices that have been shown to transfer very large amounts of thermal energy over large distances, resulting in low thermal resistances. OHPs consist of two main …
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Hydrodynamic modelling of the oscillating wave surge converter
… investigates the numerical modelling of the Oscillating Wave Surge Converter (OWSC). The OWSC is a bottom hinged, flap-type, pitching wave energy converter. The device is installed in shallow water (10 - 15 metres} and covers the entire water column from the sea floor to the water surface. …
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