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  • Wind turbulence input model for horizontal axis wind turbines

    Creator:
    Lin, Shuh-ren
    Abstract:
    In order to estimate wind turbine residL2;characteristics in the presence of atmospheric turbulence, the important atmospheric sources for the force excitations felt by the wind turbine system must be identified and characterized. The goal of this research is to develop the wind turbulence input model for horizontal axis wind turbines....
    Resource Type:
    Dissertation
    Full Text:
    . F. Tom Lindstrom, Dr. Timothy C. Kennedy, and Dr. Alan Robinson for taking their time to serve on

  • Local scour at isolated obstacles on river beds

    Creator:
    Huang, Cheng-Chang
    Abstract:
    Maximum equilibrium scour depths, equilibrium scour volumes, and induced equilibrium movements at isolated obstacles on river beds were investigated in clear-water scour. The research was achieved by a systematic flume study based on the results of dimensional analysis of local scour. The main tested obstacles for local scour were cubes....
    Resource Type:
    Dissertation
    Full Text:
    . Sollitt, F. Tom Lindstrom, Marshall J. English, Hiram W. Li, and W. S. (Gus) Baker who helped guide me

  • Continuum mechanics methods applied to root growth and the penetration of soil by roots

    Creator:
    McCoy, Edward L.
    Abstract:
    The principles of continuum mechanics provide a consistent framework for the derivation of mathematical statements describing transport of water and solute, and growth in plant tissue. These derivations are based upon the explicit consideration of the tissue as a mathematical continuum composed of a cell wall matrix, water, and solute...
    Resource Type:
    Dissertation
    Full Text:
    members of my graduate committee, Dr. Peter Bottomley, Dr. Ronald Guenther, Dr. Tom Lindstrom, and Dr

  • Master-slave control system for a novel robot design

    Creator:
    Ding, Fei-fei
    Abstract:
    This thesis presents my research on the hardware and software for control of a novel robot based on the Stewart Platform. The robot has six actuators which must be adjusted to arrive at the desired position of the platform. This position must be specified by six position parameters; namely the...
    Resource Type:
    Masters Thesis
    Full Text:
    suggestions, this thesis would have amounted to little. Thanks are also extended to Professor F. T. Lindstrom

  • The nature and properties of amorphous colloids formed from Mazama tephra

    Creator:
    Dingus, Delmar DeLee
    Abstract:
    Soil samples from the Mazama tephra deposit were collected from the AC and C2 horizons at five different locations along the axis of the main depositional lobe. The clay fraction from the samples was recovered and studied by means of chemical, x-ray, DTA and electron microscopy methods in order to...
    Resource Type:
    Dissertation
    Full Text:
    are expressed to Drs. F. T. Lindstrom, R. A. Schmitt, E. J. Dasch, and C. T. Youngberg for serving

  • Diffusion and surface reaction processes of absorption on surfaces of soil particles in unsaturated soils

    Creator:
    Yingjajaval, Suntaree
    Abstract:
    At present the adsorption kinetic of ions by soil particles is considered to be a surface reaction. When the transport of solutes in soils is described using the one-dimensional flow equation, it becomes a serious problem that lateral diffusion of ions from the bulk solution towards the soil surfaces is...
    Resource Type:
    Dissertation
    Full Text:
    would like to thank Dr. L. R. Davis, Dr. M. E. Gorden, Dr. V.V. Volk and Dr. F. T. Lindstrom for their

  • Long term temporal perspectives for the demersal fish assemblages of Georges Bank with implications for management and modeling

    Creator:
    Overholtz, William Joseph
    Abstract:
    Questions of assemblage persistence, resiliency arid continuity in time were investigated with data from seasonal bottom trawl surveys conducted by the Northeast Fisheries Center, Woods Hole, Massachusetts, from 1963-1978. Cluster analysis proved to be a useful statistical method for delineating assemblage boundries and corresponding resident demersal fish components from Georges...
    Resource Type:
    Dissertation

  • Non-target Effects of Biological Control: Ecological Risk of Tyria jacobaeae (Lepidoptera: Erebidae) to Senecio triangularis (Asteraceae) in Western Oregon

    Creator:
    Rodman, Madison G.
    Abstract:
    Non-target effects are one of the greatest potential risks of weed biological control programs, and understanding non-target effects of biological control at the population level is crucial for predicting when they will occur and altering the perception of biological control as a whole. In this thesis, we assessed the ecological...
    Resource Type:
    Masters Thesis
    Full Text:
    also to my committee members Dr. Andy Jones, Dr. Tom Kaye, and Dr. Lori Kayes for supporting me and

  • On the lyapunov-based approach to robustness bounds

    Creator:
    Jo, Jang Hyen
    Abstract:
    The objective of this investigation is the development of improved techniques for the estimation of robustness for dynamic systems with structured uncertainties, a problem which was approached by application of the Lyapunov direct method. This thesis considers the sign properties of the Lyapunov function derivative integrated along finite intervals of...
    Resource Type:
    Dissertation
    Full Text:
    committee members, Drs. Eugene F. Fichter, Timothy C. Kennedy and Tom M. West for their advice and

  • Zinc tin oxide thin-film transistor current mirror circuits

    Creator:
    Feller, Layannah Elizabeth
    Abstract:
    The central focus of this thesis is the design, fabrication and characterization of amorphous oxide semiconductor (AOS) thin-film transistor (TFT) current mirrors. The thin-film deposition and circuit fabrication methods used to realize zinc tin oxide (ZTO) TFT current mirrors are addressed in order to elucidate the processing challenges for this...
    Resource Type:
    Masters Thesis
    Full Text:
    . Title: Zinc Tin Oxide Thin-Film Transistor Current Mirror Circuits Abstract approved: John F. Wager