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Filtering by: Creator Bella, David A. Remove constraint Creator: Bella, David A. Non-Academic Affiliation Oregon State University. Graduate School Remove constraint Non-Academic Affiliation: Oregon State University. Graduate School

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  • 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

  • A study on the oxidation of sulfides in estuarine waters

    Creator:
    Korpalski, Thomas Paul
    Abstract:
    Waters of various salinities were secured from the Umpqua estuary, the Umpqua River, and the open ocean near the mouth of the estuary. The rate of oxidation of sulfides in these various waters was investigated to assess the potential longevity of free sulfides in estuarine waters. The rate of disappearance...
    Resource Type:
    Masters Thesis
    Full Text:
    STUDY ON THE OXIDATION OF SULFIDES IN ESTUARINE WATERS Abstract approved: Dr. David A. Bella Waters

  • Spatial, diel and seasonal variations in dissolved oxygen and temperature within a stratified lake

    Creator:
    Smith, Stanley Allan
    Abstract:
    Spatial, diel and seasonal variations in dissolved oxygen and temperature were measured in Triangle Lake, Oregon. Spatial dissolved oxygen and temperature variations measured in the stratified lake are presented to illustrate the horizontal uniformity of the lake and to demonstrate the applicability of the one dimensional assumption for sampling and...
    Resource Type:
    Masters Thesis
    Full Text:
    approved: Redacted for Privacy Dr. David A. Bella Spatial, diel and seasonal variations in dissolved

  • Modeling estuary pollution by computer simulation

    Creator:
    Grenney, William J.
    Abstract:
    A digital computer model was developed to simulate the time and space distribution of a dissolved pollutant in an estuary. The program is basically a one-dimensional finite-difference model, but two dimensions can be represented by attaching together several one-dimensional channels. The influence of convection, dispersion and decay are included in...
    Resource Type:
    Masters Thesis
    Full Text:
    help during the entire research project. Specia.l thanks are due Assistant Professor David A. Bella

  • 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:
    this point. I wish to express my thanks to Professor David Bella, my advi- sor, for his

  • The effect of mixing on the oxygen uptake rate of estuarine bottom deposits

    Creator:
    Martin, Duane Collins
    Abstract:
    A study of the effect of mixing on the oxygen uptake rate of estuarine bottom deposits is presented. The method of study involved the mixing of samples of bottom deposits with the overlying water to result in concentrations of suspended matter in the same order as observed in the estuary....
    Resource Type:
    Masters Thesis
    Full Text:
    Professor Dr. David A. Bella for being a constant source of assistance and inspiration. My wife, Dottie

  • In situ measurement of the benthal oxygen requirements of tidal flat deposits

    Creator:
    Crook, Gene Ray
    Abstract:
    In situ light and dark planktonic and benthal respirometers were used to measure the oxygen requirements of Yaquina estuary water and benthal deposits. Respirometer devices were constructed so that actual conditions of mixing could be simulated and benthal deposit disturbance would be minimized. A mathematical model of a benthal respirometer...
    Resource Type:
    Masters Thesis
    Full Text:
    THE BENTHAL OXYGEN REQUIREMENTS OF TIDAL FLAT DEPOSITS Abstract approved: Dr. David A. Bella In

  • Fault-tolerant ring embedding in De Bruijn networks

    Creator:
    Rowley, Robert A.
    Resource Type:
    Dissertation
    Full Text:
    approved: Bella Bose A fault-tolerant embedding of a ring in an interconnection network involves finding

  • An historical review of Kolb's formulation of experiential learning theory

    Creator:
    Hickcox, Leslie K. (Leslie Kay), 1951-
    Abstract:
    The central purposes of this study were to review the historical sources of David Kolb's formulation of experiential learning theory, and to determine the effect and application of Kolb's theory and Learning Style Inventory as reflected in the literature between 1971 and 1990. It was found that Kolb based his...
    Resource Type:
    Dissertation
    Full Text:
    the literature and research which served as a foundation to David Koib's formulation of experiential

  • Team Bella : reimagining character portrayals and engaging with social constructions of power in Twilight fanfiction

    Creator:
    Rost, Coral
    Abstract:
    Online fanfiction communities have received attention for providing spaces of creativity and individual empowerment. Yet as critics have sought to establish fanfiction as a worthy object of study, many have not grappled with the ways that fanfictions not only trouble, but also reinforce various discourses and ideas of gender and...
    Resource Type:
    Masters Thesis
    Full Text:
    narrative, as Bella experiences a number of traumatic events in the original text.   These