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 311 for “"temperature gradient"”.
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The Visceral to Skin Temperature Gradient in Restraint Hypothermia
… on skin, subcutaneous, and deep visceral temperatures of rats exposed to environmental temperatures of 0°C, 8°C, 16°C, and 28°C are determined. The temperature gradients of restrained and unrestrained rats at 0°G are compared.</p> <p>From the data presented, it is felt that one factor in …
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Characteristics of Turbulent Flow in Ducts With Temperature Gradient
Made available in DSpace on 2014-12-05T17:15:08Z (GMT). No. of bitstreams: 1 0007007.pdf: 15304619 bytes, checksum: b3f8ddf8f0806181e837f8eb876dd6c0 (MD5) Previous issue date: 1952
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Pore migration in potassium chloride due to a temperature gradient
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1980.
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A study on the ion temperature gradient driven turbulence in tokamak plasmas
… breakthrough result. Nuclear fusion can occur at temperatures of the order of 150 million degrees Celsius (thermonuclear fusion). At these temperatures atoms are completely ionized, the fuel is then in the state of matter called a plasma, a gas of ions and electrons. The most promising approach …
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Influence of moving load, structure, temperature gradient, and wheel configuration on load transfer efficiency
… The curling stresses, induced due to the temperature differentials at the top and bottom of the PCC slab can lead to higher combined stresses (loading plus curling) in pavements and can affect the load transfer efficiency at the joint. This study analyzes the effect of pavement layer …
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Investigation of electron temperature gradient driven micro-reconnecting modes in toroidal high-energy plasmas
… carried out with magnetically confined, high temperature plasmas have revealed important effects that have yet to be justified by existing theory. In particular, there arises an anomalous particle inflow in the central region of the plasma column. Experimental evidence suggests that this …
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Modelling the synoptic scale relationship between eddy heat flux and the meridional temperature gradient
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Meteorology and Physical Oceanography, 1981.
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Velocity-ion temperature gradient driven modes and angular momentum transport in magnetically confined plasmas
… that describes the evolution of the velocity-ion temperature gradient-driven modes (VITGs). The equations are used to analyze VITG modes in the local approximation of a magnetized plasma, as well as in an inhomogeneous slab model. Applying quasilinear methods, we find a turbulent angular momentum …
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Design, prototyping, and testing of an apparatus for establishing a linear temperature gradient in experimental fish tanks
… type of fish tank that provides a linear thermal gradient for experimental zebrafish in order to improve the accuracy and validity of their research. Zebrafish require the ability to select their surrounding water temperature in order to react to a simulated viral infection with an optimized …
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The Behaviour of Daphnia pulex de Geer in a temperature gradient, with special reference to the effect of exposure to D.D.T. upon the selected temperature
The selected temperature of Daphnia pulex de Geer as determined in a horizontal still-water temperature gradient showed no effect of acclimation at 15ºC and 20ºC. Exposure to varying concentrations of the DDT-carrier ethanol resulted in decreases in the selected temperatures to values below that …
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On the maintenance of weak meridional temperature gradients during warm climates
… of two mechanisms by which weak meridional temperature gradients might be maintained are studied. First, I examine the evolution of stratospheric dynamics and winter temperatures when the surface temperature gradient and tropospheric eddy energy decrease in order to assess whether …
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Temperature Effects on the Behavior of Liquid Hydrogen Isotopes Inside a Spherical-Shell Inertial Confinement Fusion Target
… desired high gain. The present work studies the temperature effects on the formation of a uniform liquid hydrogen layer inside a spherical glass shell (SGS). The profile of the liquid layer is first investigated for an isothermal case. An equation suitable for describing the profile is derived by …
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The thermomigration of Au195 and Sb125 in gold and Ni59 in nickel
The effect of large thermal gradients on the mass transport of Au195 and Sb 125 in gold and Ni59 in nickel has been investigated. Specimens in the form of rods containing two welded interfaces separated by l/8-inch were fabricated. Each interface contained a layer of the appropriate tracer an an …
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Convective Heat Transfer in Quasi-one-dimensional Magnetic Fluid in Horizontal Field and Temperature Gradients
… dimensional magnetic fluid in a horizontal temperature gradient. The horizontal non-homogeneous magnetic fields were applied across the sample cell either parallel or anti-parallel to the temperature gradient. The temperature profile was measured by eight thermocouples and temperature …
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The effect of changing topological constraints on poleward ocean heat transport induced by plate tectonics over the last 600 million years
… poleward and change the equilibrium pole-equator temperature of Earth. An ocean model was run for three simple continental geometries to determine the effect of land distribution on the heat transport capacity and pole-equator temperature gradient of the ocean. The first configuration, a circle of …
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A Study of Heat Transfer and Heat Flow Asymmetry through Water in the presence of the Density Maximum
… of the density maximum and the behaviour of the temperature of maximum density of aqueous solutions. Both of these topics are investigated by cooling a rectangular enclosure of the test fluid in a quasi-steady state manner. During cooling, the temperature at select points within the liquid is …
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Artificial Anisotropy for Transverse Thermoelectric Heat Flux Sensing
… of two different materials in the presence of a temperature gradient, while the Peltier effect is the generation of a temperature gradient across a device of two different materials in the presence of an electrical current. This project focuses on the first of these two phenomena, where the …
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