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  • A numerical study of coastal stratus cloud in a two-dimensional meso-scale model

    Creator:
    Lee, Tae Young
    Abstract:
    A two-dimensional numerical mesoscale model, which ic1udes radiative and turbulent transfers, has been constructed to study the formation, development and dissipation of coastal stratus cloud under an inversion. In the model, the delta-Eddington and emissivity approximations are used for the solar and thermal radiative transfers, respectively. K-theory parameterization is adopted...
    Resource Type:
    Dissertation
    Full Text:
    Coastal Stratus Cloud in a Two-Dimensional Meso-Scale Model Abstract approved: A two-dimensional

  • Toward the estimation of errors in cloud cover derived by threshold methods

    Creator:
    Chang, Fu-Lung
    Abstract:
    The accurate determination of cloud cover amount is important for characterizing the role of cloud feedbacks in the climate system. Clouds have a large influence on the climate system through their effect on the earth's radiation budget. As indicated by the NASA Earth Radiation Budget Experiment (ERBE), the change in...
    Resource Type:
    Masters Thesis
    Full Text:
    distribution of cloud cover for (60 km)2 regions. 47 Figure 6.4 Simple model for frequency distribution of

  • Noether-type theorems for the generalized variational principle of Herglotz

    Creator:
    Georgieva, Bogdana A.
    Abstract:
    The generalized variational principle of Herglotz defines the functional whose extrema are sought by a differential equation rather than an integral. It reduces to the classical variational principle under classical conditions. The Noether theorems are not applicable to functionals defined by differential equations. For a system of differential equations derivable...
    Resource Type:
    Dissertation

  • Modeling and simulation of CF₄/O₂ microwave plasma afterglows

    Creator:
    Camara, Amadou Tidiane
    Abstract:
    A gas phase kinetic model for the CF₄/O₂ microwave discharge plasma and afterglow of our laboratory has been developed. A reaction pathway identifying the major chemical reactions is proposed. The rate coefficients of the electron impact dissociation reactions are determined at three different plasma powers using both published electron molecule...
    Resource Type:
    Masters Thesis
    Full Text:
    mathematical model were performed using computational fluid dynamics. It is found that the model reproduced

  • Rebound predictions of mechanical collisions

    Creator:
    Lai, Liang-Ju
    Abstract:
    Predictions of mechanical collisions between two bodies frequently cannot be completed by the impulse-momentum equation together with a complete description of the motion of the system at the initial contact. Additional account must be taken of the deformations and frictional interaction induced by the impulsive reaction force, where the bodies...
    Resource Type:
    Dissertation
    Full Text:
    , a considerably simplified, coupled, conservative model, which captures the essential

  • Monte Carlo simulation of oxygen mobility in cubic zirconia

    Creator:
    Gutekunst, Bernd
    Abstract:
    The focus of this thesis is a study of the thermodynamics and the transport of oxygen in yttrium-doped cubic zirconia (Zr0₂). This material is representative of other ceramics with the same crystal structure (Y-Ce0₂ etc.). The Monte Carlo technique as developed by Metropolis et al. is used to calculate thermodynamical...
    Resource Type:
    Masters Thesis
    Full Text:
    is due to an increase in the interstitial barrier height, which is not built into this model

  • Electromagnetic properties of anisotropic plasmonic metamaterials

    Creator:
    Elser, Justin Lee
    Abstract:
    In this dissertation we study the electromagnetic properties of plasmonic metamaterials. We develop an analytical description to solve the fundamental problem of free-space scattering in planar plasmonic systems by utilizing anisotropic metamaterials. We show with exact numerical simulations that these manufactured materials do completely eliminate the scattering, and even in...
    Resource Type:
    Dissertation

  • Heavy fermion effective mass in the superconducting vortex state

    Creator:
    Townsend, Emily A.
    Abstract:
    The extended-Lifshitz-Kosevitch formalism (ELK) unifies the treatment of the de Haas-van Alphen (dHvA) effect, allowing it to transcend its traditional roles of mapping Fermi surfaces and measuring effective masses. Here we exploit the capabilities of dHvA as a probe of many-body effects to examine heavy-fermion su- perconductivity. ELK successfully describes...
    Resource Type:
    Dissertation
    Full Text:
    - perconductivity. ELK successfully describes dHvA in heavy fermion materials using a slave-boson model in mean

  • The influence of small scale variability on scaling relationships describing atmospheric turbulence

    Creator:
    Howell, James Frederick
    Abstract:
    The statistics describing variations of turbulent motions within the so called inertial range of length scales depend on the scale over which the motions are varying and the "average" rate at which the turbulent kinetic energy is being dissipated on the molecular scale. This hypothesis stemmed from the similarity arguments...
    Resource Type:
    Masters Thesis
    Full Text:
    Chapter 2 Mathematical Methods .................... 18 Section 2.1 Orthogonal Variance Decompositions

  • Solid/liquid phase change in small passageways : a numerical model

    Creator:
    Coven, Patrick J.
    Abstract:
    During the operation of phase-change ink-jet printers a bubble formation phenomenon often occurs. These bubbles are detrimental to the operation of the printer and substantial efforts are made to remove them. The objective of this research was 1: to develop a fundamental understanding of how bubble or void formation occurs...
    Resource Type:
    Masters Thesis
    Full Text:
    numerical model AN ABSTRACT OF THE THESIS OF Patrick J. Coven for the degree of Master of Science in