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 400 for “"elliptical"”.
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Hyperthermia in elliptical patterns
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1984.
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Human Interaction with Various Elliptical Constraints
… work explores interaction with three different elliptical kinematic constraints. The shapes of these constraints were based on prior work: the circle was the same size as a previous crank-turning study; the aligned ellipse was based on estimates of the zero-force trajectory during circular …
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Torsion of Elliptical Composite Cylindrical Shells
The response of elliptical composite cylindrical shells under torsion is studied. The torsional condition is developed by rotating one end of the cylinder relative to the other. Prebuckling, buckling, and postbuckling responses are examined, and material failure is considered. Four elliptical cross …
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Elliptical cost-sensitive decision tree algorithm - ECSDT
… problem by developing a new algorithm called the Elliptical Cost-Sensitive Decision Tree algorithm (ECSDT) that induces cost-sensitive non-linear (elliptical) decision trees for multiclass classification problems using evolutionary optimization methods such as particle swarm optimization (PSO) and …
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Photometry of elliptical galaxies in crowded starfields
Includes bibliographical references.
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Ultrasonic reflection tomography : elliptical path image reconstruction
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1997.
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Stresses around neighbouring elliptical holes in flat plates.
Thesis. 1976. M.S.--Massachusetts Institute of Technology. Dept. of Ocean Engineering.
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Design and structural analysis of an elliptical skylight
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2001.
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Stellar occultation lightcurve modeling for elliptical occulting bodies
We present a new method of calculating model lightcurves for stellar occultations by the Jovian planets. We model the occulting planet as a three-dimensional body of non-zero ellipticity, and define two ellipses of intersection with the body which dictate the appearance of the lightcurve. These …
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The structure of elliptical galaxies and galaxy clusters
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1995.
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Invariant tests for scale parameters under elliptical symmetry
… then the distribution of Ax + b is said to be elliptically symmetric. The class of spherically symmetric laws contains such heavy-tailed distributions as the spherical Cauchy law and other symmetric stable distributions. As such laws need not have moments, the emphasis here is on tests for …
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Modelling the star formation histories of nearby elliptical galaxies
… the star formation histories of 21 nearby elliptical galaxies, finding that they formed 13.26 +0.09 -0.06 Gyrs ago, that all mergers are dry, and that galactic winds are formed from AGN activity (rather than being supernovae-driven). This thesis also finds evidence to support the …
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Advances in elliptical-core two-mode optical fiber sensors
… designed to improve the practicality of the elliptical-core two-mode optical fiber sensors for use in real-life applications are presented. The improvements include the development of insensitive lead fibers and an optical device which allows fringe counting at the output of the sensor. The …
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Robust Adaptive Estimation for Autonomous Rendezvous in Elliptical Orbit
… to the problem of 6-DOF rendezvous navigation in elliptical orbit. The full nonlinear equations of relative motion are formulated in spherical coordinates centered on the target orbit. A relatively simple control law based on feedback linearization is used to track a desired rendezvous trajectory. …
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Response and Failure of Internally Pressurized Elliptical Composite Cylinders
… to study the response of internally pressurized elliptical composite cylinders with clamped boundaries. Using a geometrically linear analysis and the solution scheme, the response of a quasi-isotropic elliptical cylinder is compared with the response of a quasi-isotropic circular cylinder in …
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Dynamic stability of an elliptical pendulum with unilateral simple supports
… Just recently, a WVU team proposed the use of an elliptical pendulum to substitute the sloshing dynamics in partially filled elliptical tankers.;In this research, a trammel mechanism is configured as an elliptical pendulum with a unilaterally supported base. That is, the supports on either side …
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Origin and Properties of Elliptical Galaxies in a Hierarchical Universe
The formation of elliptical galaxies by merging galaxies has been investigated adopting three different paths. First, we confirm that the frequency of major merger events predicted by hierarchical models is in fair agreement with observations. Second, the generally assumed initial conditions used …
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Behaviour of elliptical tube columns filled with self-compacting concrete
… is conducted to investigate the behaviour of elliptical tube columns filled with self-compacting concrete (SCC). In total, ten specimens, including two empty columns, were tested to failure. The main parameters investigated were the length and the sections of the columns, and the concrete …
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