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  • Computer simulation of eutrophication

    Creator:
    Bella, David A.
    Abstract:
    The proposal for the research project reported herein was princi­pally prepared during 1968 and the starting date for this study was established as September 1, 1969. In the approximately four years from the preparation of this proposal to the completion of this final report, the state of the art for...
    Resource Type:
    Technical Report
    Full Text:
    I COMPUTER SIMULATION OF EUTROPHICATION by David A

  • Technology and its limitations

    Creator:
    Bella, David A.
    Resource Type:
    Technical Report
    Full Text:
    A. Bella Professor of Civil Engineering Dept. of Civil Engineering Oregon State University

  • David's Blog

    Creator:
    David
    Abstract:
    Oregon State University first year students share their stories of making the transition to OSU.
    Resource Type:
    Other
    Full Text:
    David from Albany, Oregon - (October 27, 2006) This week was a lot better because of mid-terms being

  • Selling and buying in a distributed virtual market place

    Creator:
    Bella, Ravi
    Abstract:
    We present a model for a distributed virtual market place that can be con­structed on the Internet to support selling and buying requests, such as those found as classified advertisements. One requirement for a transaction to take place in the virtual market place is that a sell request and a...
    Resource Type:
    Capstone Project
    Full Text:
    by Ravi Bella A research paper submitted in partial fulfillment of the degree of Master of

  • 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