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 346 for “"third-order"”.
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Third-order charged particle beam optics
… system. In this thesis we present a complete third-order theory of computing transfer matrices and apply it to magnetic elements in an accelerator beam-line. A particular attention is devoted to studying particles' orbits in an extended fringing field of a dipole magnet. Analytical solutions …
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Third-order charged particle beam optics
The motion of a charged particle through a magnetic field configuration can be described in terms of deviation from a certain ideal trajectory. One uses power series expansion of the phase-space coordinates to obtain the transfer matrices for a particular optical system.
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The third order elastic constants of aluminum
The complete set of six third order elastic constants of single crystal A1 has been experimentally determined by measuring both hydrostatic pressure and uniaxial stress derivatives of the natural sound velocities using a two specimen interferometric technique. The values obtained are ...in units of …
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Oscillation of a Third Order Nonhomogeneous Differential Equation.
This thesis considers the third order, nonhomogeneous, (NH), linear differential equation(NH) y'"+ p(x)y' + q(x)y = f(x),together with the associated homogeneous equation(H) u'" + p(x)u' + q(x)u = 0.The coefficient functions p(x), q(x), and the forcing function f(x) are assumed to be continuous, …
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Third Order Nonlinearity In III-Nitride Microwave Switches
… produce undesired output signals. 3rd order intermodulation product is very important because it occurs in the frequency range close to that of fundamental signals and is impossible to filter out. The only solution to the problem is to minimize the level of this distortion. The IP3 …
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The second and third order elastic constants of magnesium
The complete set of the ten third order elastic constants of magnesium has been determined experimentally from measurements of the hydrostatic pressure and uniaxial compression derivatives of the natural sound velocities using an ultrasonic pulse superposition technique. The specimen was neutron …
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Characterization of second and third order susceptibilities in organic salts
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1992.
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Characterizing Ultrafast Equilibrium Dynamics Using Third-Order Nonlinear Mid-Infrared Spectroscopies
… properties and processes in various systems. Third-order nonlinear mid-infrared spectroscopic techniques are powerful tools for investigating ultrafast dynamics under thermal equilibrium. In this thesis, vibrational energy relaxation and orientational relaxation dynamics were extracted from …
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Possibility of the impossible: exploring third order change towards responsible banking
This doctoral thesis explores third order change as a ‘form of embodied enactive ethics’ in the context of shareholder capitalism, and the possibility of organizational transformation when it comes to mainstream banking, through narrative based inquiry into the ecosystem of realities of the …
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Application of the Linfoot quality factors to third order spherical aberration
… by an optical system with a nominal amount of third order spherical aberration is theoretically discussed in this paper. In order to describe the physical status of the image, three criteria Relative Structural Content, Correlation Quality and Image Fidelity defined by Linfoot and another …
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Characterization of third order nonlinearities in TiO₂ waveguides at 1550 nm
Polycrystalline anatase titanium dioxide waveguides are investigated as an alternative material for all-optical switching at telecommunications C-band wavelengths. Titanium dioxide does not support two-photon absorption at 1550 nm, has a high refractive index, and a relatively low loss, which …
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Third-order theory of pump-driven plasma instabilities : laser-pellet interactions.
Thesis. 1975. Ph.D.--Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.
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Enhancing the Third-Order Nonlinear Optical Properties of Porphyrins and Molecular Wires
The third-order nonlinear optical (NLO) properties of indium tin oxide (ITO) thin films, Fe3+, Mn3+, Co2+ 5,10,15,20-tetrakis-4hydroxytetraphenyl)porphyrin (TPP) films, and a series of ethynyl-linked azobenzene oligomers were investigated using degenerate four wave mixing (DFWM) with 100 fs laser …
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Studies of third-order nonlinearities in materials and devices for ultrafast lasers
Recent developments in telecommunications, frequency metrology, and medical imaging have motivated research in ultrafast optics. Demand exists for broadband components and sources as well as highly nonlinear fibers and materials. For this thesis, several different devices have been developed for …
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Generalization of Lie's counting theorems for second and third order ordinary differential equations
… an ordinary differential equation of second or third order covariant. Sophus Lic has derived such theorems for a particular class of transformations. The new theorems contain Lic’s theorems as a suboase, and are therefore called ‘generalized” theorems.
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Second and Third Order Systems of Integrable Equations of the Davey-Stewartson Type
We also prove that the map$$v\to u=v\partial\sbsp{\bar z}{-1}v\sb{z}-v\sb{z}$$where $z=x+\sigma y,\ \bar z=x-\sigma y$ (when $\sigma=1$ this applies to the case I and when $\sigma=i$ to case II) maps a solution of the mod-NVN equation to a solution of NVN.
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The organisation of a third-order olfactory brain region in the vinegar fly
… behaviours by combining patterns of second-order olfactory projection neuron (PN) activity. While most odorants only elicit a strong behavioural response after associative learning, ecologically meaningful and evolutionarily significant odour channels trigger innate behavioural responses, …
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Implementation of Third Order Plate Theory for use in Existing Finite Element Software
… A finite element implementation based on a third-order shear deformation element was used in a standard finite element program to model transverse shear stresses in a simply supported plate. Four elements based on third-order theory are developed and tested. Using static condensation to …
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