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Showing 1 to 20 of 108 for “"Classical theory"”.
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The classical theory of field evaporation
The field evaporation literature has been carefully analysed and is shown to contain various confusions. After redefining consistent terminology, this thesis investigates the mechanisms of field evaporation, in particular, the relevance of the theoretical mechanisms by analysing the available …
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The classical theory of economic growth
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Economics and Social Science, 1959.
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Estudo da validade da hipótese de Kirchhoff-Love na Teoria das Placas
Equations and boundary conditions from the classical theory due to Kirchhoff-Love and the refined Reissner theory were obtained by using the linear theory of elasticity and standard energy variational principles. Analytical expressions of deflections and resultant stresses are treated for …
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Continuum and Atomistic Simulation of Electrically-Mediated Flow Through Nanometer Channels
… behavior, which cannot be explained by the classical theories. Our results also indicate that if the critical channel dimension is larger than ten molecular diameters, then the classical theory can be used to describe fluid/ion characteristics in the central part of the channel, but an …
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Arbitrarily curved and twisted space beams
… These equations differ from those of the classical theory in that extensional effects are included. Other departures from the previous theory are that the strain - displacement relations are derived and that the expressions for the stress resultants are developed from the strain - …
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Nonlinear vibration and frequency response analysis of piezoelectric-based nanotube resonators
… method are associated with non-local non-classical theory to develop the nonlinear vibration models and two strong methods known as Galerkin technique and multiple scales method are employed to find the solutions of the developed systems equations.
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Strengthening of metastable beta titanium alloys
… rapid cooling from the $\beta$ phase field. The classical theory of athermal $\omega$ formation is based upon a diffusion-less mechanism in which consecutive pairs of $\{111\}$$_{\beta}$ planes collapse together. However, latest high-resolution electron microscope observations have suggested …
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Finite element formulation of a thin-walled beam with improved response to warping restraint
Linear elastic theory of torsion and flexure of thin-walled beams as developed by Vlasov and Timoshenko respectively are well known and commonly used in everyday engineering practice. However there are noticeable differences between calculations and experimental results. The difference is partly …
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Differential Geometry in Computational Electromagnetics
… In this approach, rather than take the classical theory based on the continuum as a given and constructing approximate numerical techniques from there, work is done toward constructing an alternative to the continuum theory that is built up from scratch in a discrete setting. The goal is …
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Approximations by means of continued fractions
… to our modern notion of continued fractions. The classical theory of continued fractions began during the Renaissance when Arabic numerals and the modern fractional notation had become common. It was studied and extended until about the end of the nineteenth century. This theory is concerned with …
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A Study of Shock Analysis Using the Finite Element Method Verified with Euler-Bernoulli Beam Theory; Mechanical Effects Due to Pulse Width Variation of Shock Inputs; and Evaluation of Shock Response of a Mixed Flow Fan
… Method Verified With Euler-Bernoulli Beam Theory; Mechanical Effects Due To Pulse Width Variation Of Shock Inputs; And Evaluation Of Shock Response Of A Mixed Flow Fan</p> <p>David Jonathan González Campos</p> <p>For many engineers that use finite element analysis or FEA, it is very …
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The Methodology of Loop Quantum Gravity
… Loop Quantum Gravity, a proposed quantum theory of gravity developed in recent years from the quantization of General Relativity in connection variables. Loop Quantum Gravity is known to have the property of background independence in contrary to other contemporary approaches to quantum …
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Quasi-elliptic cohomology
… introduce and study quasi-elliptic cohomology, a theory related to Tate K-theory but built over the ring $\mathbb{Z}[q^{\pm}]$. In Chapter 2 we build an orbifold version of the theory, inspired by Devoto's equivariant Tate K-theory. In Chapter 3 we construct power operation in the orbifold theory, …
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Extensive categories, commutative semirings and Galois theory
We describe the Galois theory of commutative semirings as a Boolean Galois theory in the sense of Carboni and Janelidze. Such a Galois structure then naturally suggests an extension to commutative semirings of the classical theory of quadratic equations over commutative rings. We show, however, …
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Theory of Electronic Response to Electromagnetic Fields in Crystalline Solids
In a classical theory of light-matter interactions, the introduction of macroscopic polarization and magnetization fields, and free charge and current densities, provides physical insight into the distribution and the dynamics of the charges that constitute a material medium. Here we consider a …
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Nonreciprocal and Exotic Radiative Transfer in Type-I Magnetic Weyl Semimetals
The classical theory of radiative heat transfer has proven extraordinarily useful, both in advancing fundamental physics through the discovery of quantum mechanics and in developing practical applications. However, the classical theory can break down, opening up new opportunities for energy …
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Projective Geometry for Perfectoid Spaces
… X together with some extra data, reflecting the classical theory. Along the way we give a complete classification of vector bundles on the perfectoid unit disk, and compute the Picard group of the perfectoid analog of projective space.
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Aplicacion del metodo de Ritz a funcionales relajados en mecanica de los solidos
The theory of the first variations of different type of functionals is presented in this work. The Weierstrass – Erdmann corner conditions are obtained for each one of these functionals. The classical theory of the Ritz Method is developed, but when dealing with convergende of the aproximated …
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Large-signal tools for power electronics: State space analysis and averaging theory
… control and unusual instability phenomena. The classical theory of averaging for systems of ordinary differential equations is applied to power electronic systems. A theoretical basis for widely used averaging approximation techniques is developed. Three new large-signal tools are introduced …
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