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 12 of 12 for “"variational theory"”.
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Variational theory of quantum fluids
"A theory is developed to allow the systematic calculation of the properties of quantum fluids given the microscopic two-body potential. Physical arguments are used to construct a correlation operator that approximately transforms the states of a non-interacting system into the corresponding states …
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Variational Theory of Hot Dense Matter
We develop a variational theory of hot nuclear matter in neutron stars and supernovae. It can also be used to study charged, hot nuclear matter which may be produced in heavy-ion collisions. This theory is a generalization of the variational theory of cold nuclear and neutron star matter based on …
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A variational theory of nuclear matter
… hampered by the lack of an adequate many-body theory for treating the complicated forces involved. Realistic nucleon-nucleon potentials have strong spin, isospin, tensor and spin-orbit components which induce correspondingly strong correlations in nuclear matter. In this thesis we present a …
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Contributions to the variational theory of convection
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mathematics, 1996.
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On the Variational Theory of Yang-Mills-Higgs Energies and the Structure of the Singular Set of $\mathbb{Z}$$_{2}$-Harmonic Spinors
… with Alessandro Pigati and Daniel Stern on the variational theory of the self-dual U(1)-Yang-Mills-Higgs functionals on a closed Riemannian manifold (M,g). This natural family of energies associated with sections u: M → L and metric connections ∇ of Hermitian line bundles has long been studied …
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Numerical and Theoretical Developments for Coherent Structures
… and objective Eulerian coherent structures. This theory extends notions developed for autonomous systems to those that may have arbitrary dependence on time and whose flow data may not be known or available for all time. The structures obtained from this theory are material surfaces that have an …
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Discrete Fractional Calculus and Its Applications to Tumor Growth
Almost every theory of mathematics has its discrete counterpart that makes it conceptually easier to understand and practically easier to use in the modeling process of real world problems. For instance, one can take the "difference" of any function, from 1st order up to the <i>n</i>-th order with …
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Chain dynamical theories of protein folding
… in this thesis. First, we derive a mode-coupling theory for the dynamics of a random heteropolymer and study the dynamical glass transition signaled by a violation of the fluctuation-dissipation theorem. Next, we develop a variational theory for the smooth free energy surface of minimally …
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On the microscopic theory of liquid ⁴He
… excitations of liquid 4He is presented. The variational theory is used in conjunction with a perturbative scheme called correlated basis perturbation theory. The hypernetted-chain technique is used to calculate the various matrix elements. First, the ground state calculations are reviewed …
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Mathematical and Computational Methods for the n-Body Problem
… develops an integrated framework that combines variational analysis, advanced numerical optimisation, and rigorous computer-assisted proofs (CAPs) to detect, classify, and validate periodic solutions of the n-body problem. The work begins by reformulating the search for periodic trajectories as …
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Iterative Techniques for Radial Basis Function Interpolation
… by Dyn et al. (1983, 1986), motivated by the variational theory of thin plate splines. It is helpful to view the original algorithm as a linear operator working on a certain linear space equipped with the aforementioned semi-inner product. The original algorithm had the drawback that the …
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Tokamak Elongation Effects on Ballooning Modes
Made available in DSpace on 2017-07-06T18:59:11Z (GMT). No. of bitstreams: 3 Tran_Sy_V_MS.pdf: 37214224 bytes, checksum: b431bc5833f129df3f82eb499cca4cf2 (MD5) Tran_Sy_V_MS_ABS.pdf: 452232 bytes, checksum: 70547b20ad7c1413be7c16e16d3c691b (MD5) license.txt: 4813 bytes, checksum: …