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 23 for “"End Effects"”.
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The means to an end : effects of process on group choice and problem solving
Thesis (Ph.D.)--Massachusetts Institute of Technology, Sloan School of Management, 2000.
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Induction Motors With Rotor Helical Motion
… motion. The linear motion generates dynamic end effect on both linear and rotary armature. Modeling such an effect in rotary armature is a significant challenge as it requires a solution considering motion with two degrees of mechanical freedom. In other words, the rotor in the model would …
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Breakdown in high voltage, high energy density multilayer ceramic capacitors
… were either field enhancements due to electrode end effects or pores between the dielectric and electrode layers...The one common source of failure was porosity although it was located in different regions of the capacitors. Liquid-phase sintering can be used to eliminate porosity and therefore …
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Eddy currents in windings of switched reluctance machines
… contains a new method to consider the so-called end-effects. Using the implemented finite element tool, the winding geometry of a traction machine is optimized. By changing the conductor dimensions, the losses are significantly reduced and efficiency accordingly increases. Based on numerous …
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Robust planning for Effects-Based Operations
… creating theater-level robust mission plans for Effects Based Operations (EBO) of teams of Unmanned Aerial Vehicles (UAVs), and propose methods of effectively presenting the robust plan to an end user. Recent conflicts have demonstrated the utility of UAVs in performing Intelligence, …
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Flux pinning in superconducting Pb-Na
… Ginzberg-Landau equations. The discussion is extended to consider flux pinning in the bulk and on the surface in the mixed state. The apparatus used to measure the a.c. flux penetration into a Pb-Na cylindrical single crystal is described together with the experimental techniques employed. The …
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High speed linear induction motor efficiency optimization
… to design and control a high-speed linear motor. End effects and other geometry subtleties of a linear motor make it unique, and a means of optimizing efficiency with both the motor geometry and the motor control scheme will be analyzed to create a High-Speed Linear Induction Motor (LIM) with a …
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A Three-Dimensional Magnetohydrodynamic Duct Flow in A Non-Uniform Magnetic Field
… poles. In this way, the important problem of end effects can be modeled. The duct is an expansion with parallel, perfectly-conducting side walls and diverging, electrically insulating top and bottom walls. The problem is solved using boundary layer techniques via matched asymptotic expansions. …
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Dynamics of long flexible cylinders at high-mode number in uniform and sheared flows
… current direction, the current profile, and the end effects at high mode number.
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An experimental and numerical study of notch sensitivity of ARALL laminates
… element analysis was also used to study the end effects and for establishing the specimen geometry.
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Historical growth rates and changing climatic sensitivity of boreal conifers
… different standardisation techniques, used in dendroclimatology to remove internal, non-climate related growth trends in measured series of ring-widths, is explored with an emphasis on the efficiency of the Regional Curve Standardisation (RCS) technique. The approach adopted here makes extensive …
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Molecule transport in nanopores with applications to water purification, power generation and disease diagnosis
… works for flow in infinitely long tubes where end effects are neglected. In 1891, Ralph Allen Sampson came up with a formula, known as Sampson formula, within the fluid mechanics framework to describe flow in an infinitesimally thin orifice. Zeev Dagan, Sheldon Weinbaum and Robert Pfeffer …
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Flow, Heat Transfer, and Pressure Drop Interactions in Louvered-Fin Arrays
… fins. Specifically, this research explores the end effects of heat exchanger walls; the effect of vortex shedding on heat transfer and pressure drop; and the effect of using convex louvers rather than flat (offset-strip) fins. Flow visualization is performed using dye in a water tunnel, and …
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Thermal properties of advanced aerogel insulation
… (1 0mW/m K at 1 atm) along with a correction for end effects was validated with the NIST (National Institute of Standards and Technology) Standard Reference Material 1459, fumed silica board to within 1 mW/mK. Despite the translucence of the aerogel at certain wavelengths, radiation is not an …
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An investigation of strain patterns and mesoscopic structures associated with ramp-induced folds
… boundary conditions, including lubrication, end effects, and the ratio of mechanical unit to overburden rigidity determine proportions of translation and amplification which operate during the development of three main and two hybrid fold forms. Each fold geometry exhibits a unique strain …
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Effects of collagen content, fiber alignment, storage and heating on cooking characteristics, dimensional changes and microstructure of restructured beef
Studies were conducted to determine the effects of collagen level, fiber alignment, frozen storage and oven temperature on cooking characteristics and the dimensional and structural changes of restructured beef steaks. Three replicates of high (HC) and low collagen (LC) raw materials similar in …
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Effects of Experimental Conditions on Fracture Research Using 3D Printed Materials
… was carried out to systematically evaluate the effects of different parameters in rock testing under uniaxial compression. The parameters include post-processing curing, printing orientation, compression platen type, specimen centering, loading control method and rate, specimen size, specimen …
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Clinical observations on yaws as studied on the west coast of Africa, 1922-1936
… other diseases. • 4. While Gangosa and other effects appear dramatic in their rapidity, they are really the end effects of a slow insidious process. • 5. Yaws is 1. A cause of sterility and hard labour; 2. Definitely detrimental to the fetus in as far as the disease affects the mother; 3. A …
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Melt growth of BSO (Bi₁₂SiO₂₀) : critical issues for growth in a micro-g environment
… tension of BSO melts (- 200 mJ/m2) showed no dependence on P02. Based on the partial wetting conditions, platinum confinements for the growth of BSO with and with out gravity were designed. (2) Thermal characteristics in a Bridgman system, specifically the distribution and the stability of the …
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Mathematical modelling and control of agitated extraction columns
… properties throughout the length of the column. End effects were treated by addition of stages at the column entrances. Two parameters were incorporated in the model namely; mass transfer weight factor to correct for the assumption of no mass transfer in the. settling zones at each stage and the …
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