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  • A mathematical model for adsorptive bubble-separation processes

    Creator:
    T'ang, Li
    Abstract:
    Adsorptive bubble-separation processes are used to remove adsorptive contaminants from wastewater. A mathematical model was developed for the adsorptive bubble separation processes in a countercurrent column. The model included an assumption that linear adsorption of the solute occurred on the gas bubbles. Predictions indicated that aqueous column height has less...
    Resource Type:
    Dissertation
    Full Text:
    Engineering presented on April 3, 1990. Title: A Mathematical Model for Adsorptive Bubble- Separation

  • Stability analysis of nonlinear coupled barge motions

    Creator:
    Nakhata, Tongchate
    Abstract:
    The present research investigates nonlinear barge motions through analyses of coupled multi-degree-of-freedom (MDOF) deterministic and stochastic models. Roll-Heave-Sway and other lower-ordered models are developed to predict the nonlinear motions and analyze the stability of a class of ship-to-shore cargo barges. The governing equations of motion contain coupled rigid body Roll-Heave-Sway...
    Resource Type:
    Dissertation
    Full Text:
    included in dynamic stability analysis. He found the dynamic stability regions and boundaries depend on

  • Fluid-structure interaction analysis with the particle finite element method

    Creator:
    Zhu, Minjie
    Abstract:
    To facilitate the evaluation and design of structures subjected to fluid loading, a study of fluid-structure interaction (FSI) using the particle finite element method (PFEM) is presented to approximate the responses and sensitivities of structures which interact with fluid. A wide range of structural types are permissible by making no...
    Resource Type:
    Dissertation
    Full Text:
    Fluid-Structure Interaction analysis with the particle

  • New Techniques to Monitor and Characterize Landslide Behavior and Controls Using Digital Terrain Models

    Creator:
    Senogles, Andrew
    Abstract:
    Coastal landslides and erosion are major natural hazards resulting in unstable slopes, constituting immense challenges to modern infrastructure. Developing, maintaining, and performing risk assessments of infrastructure on, or close to, these hazards require a detailed understanding of the geophysical processes destabilizing the slope. These efforts start with the collection of...
    Resource Type:
    Dissertation
    Full Text:
    Senogles for the degree of Doctor of Philosophy in Civil Engineering presented on February 9, 2023

  • Bridge Model Parameter Sensitivity in Pushover and Nonlinear Time History Analysis

    Creator:
    Johnsohn, Karryn E.
    Abstract:
    The aim of this research is to understand and quantify the modeling differences between CSiBridge and OpenSees, and to determine sensitive model parameters. When designing bridges for the high seismic region of California, the California Department of Transportation (Caltrans) performs nonlinear time history analysis of their bridge models. For three-dimensional...
    Resource Type:
    Masters Thesis
    Full Text:
    essential to understand the limitations of analysis software as well as the differing mathematical

  • Analysis of dichotomous response models for low-dose carcinogenic risk estimation

    Creator:
    Tabesh, Taraneh
    Abstract:
    Several dichotomous-response models of carcinogenesis are discussed and their implications for low-dose risk estimation are examined. In addition, a pharmacokinetic model incorporating non-linear kinetics is studied and the results are investigated with respect to multiple-pollutant exposures. None of these models appears to suggest the existence of "thresholds". The analysis of...
    Resource Type:
    Masters Thesis
    Full Text:
    in Civil Engineering presented on August 16, 1983. Title: ANALYSIS OF DICHOTOMOUS RESPONSE MODELS

  • Mathematical model of a phytoplankton community in a nitrate limited environment

    Creator:
    Grenney, William J.
    Abstract:
    Mathematical modeling of phytoplankton populations based on laboratory observations provides increased understanding of the interaction among the environmental and biological mechanisms. influencing growth dynamics. Such fundamental understanding is necessary to estimate the impact of man-made perturbations on natural population. A three-compartment mathematical model was developed to represent a phytoplankton population...
    Resource Type:
    Dissertation
    Full Text:
    Abstract approved: 'David A. Bella Mathematical modeling of phytoplankton populations based on laboratory

  • Parametric uncertainties in reliability analysis of bridge structures

    Creator:
    Hamutcuoglu, Osman Murat
    Abstract:
    Probability-based reliability methods have placed an increased emphasis on realistic simulation of structural behavior in bridge engineering. Uncertainty is present in every aspect of structural analysis. Aleatory uncertainties in the loading and load-carrying capacities, and epistemic uncertainties in mathematical idealization of bridge systems are the major contributors to uncertain structural...
    Resource Type:
    Dissertation
    Full Text:
    Reliability analysis at all sections on an interior girder of the McKen- zie River Bridge: Reliability index

  • Design, analysis and evaluation of bridge superstructures for live loads

    Creator:
    Turan, O. Tugrul
    Abstract:
    Due to age, original design that is deficient by modern standards, inadequate maintenance, environmental conditions, and increasing loads, large numbers of bridges in United States and elsewhere are classified as deficient and in need of rehabilitation or replacement. According to a national bridge inventory established by the Federal Highway Administration,...
    Resource Type:
    Dissertation
    Full Text:
    element analysis results considering both symmetrical and asymmetrical patch loading on the plate. Using

  • Stochastic analysis of the nonlinear response transition behavior of an ocean system

    Creator:
    Yuk, Dongjun
    Abstract:
    The nonlinear response of an ocean system subjected to random excitations can exhibit very complex dynamic behaviors including jump phenomena and coexistence of attractors. In this study, the stochastic system response behavior of a simple (Duffing) oscillator under narrow-band random excitations is first examined in the subharmonic resonance region. A...
    Resource Type:
    Masters Thesis
    Full Text:
    Science in Civil Engineering presented on February 16, 2001. Title: Stochastic Analysis of the Nonlinear