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Filtering by: Subject Lumbering -- Mathematical models Remove constraint Subject: Lumbering -- Mathematical models Degree Name Master of Science (M.S.) Remove constraint Degree Name: Master of Science (M.S.)

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  • Simulation of a helicopter yarding system in old growth forest stands

    Creator:
    LeDoux, Chris B.
    Abstract:
    Helicopter yarding systems have become a popular tool in removing timber from steep slopes, sensitive soils, limited access areas, and environmentally sensitive stands. Little is known about the system's dynamics. This study is part of a research project to explore "advanced" logging systems as to their economic efficiency and environmental...
    Resource Type:
    Masters Thesis

  • Log breakdown using dynamic programming and 3-D log shape

    Creator:
    Zeng, Yimin
    Abstract:
    A log breakdown model, SAW3D, was developed to optimize lumber recovery from logs of any shape in 3- dimensional space. The program uses a polygonal cross section representation of logs; three nested dynamic programming (DP) algorithms to optimize log breakdown, flitch and cant edging, and trimming operations; and a simple...
    Resource Type:
    Masters Thesis

  • Development of a posture prediction model

    Creator:
    Dendamrongvit, Thidarat
    Abstract:
    Biomechanical models have been used in designing human work environments to evaluate potential risks to workers before a work environment is constructed. In order for work environments to be modeled correctly, most biomechanical models require as input, an accurate body posture of the worker. This information can be obtained by,...
    Resource Type:
    Masters Thesis
    Full Text:
    biomechanical model to predict maximum static hand force exertion capability. This mathematical biomechanical

  • Modified limiting dilution analysis : a mathematical model with biological interpretation

    Creator:
    Maier, Stefan H.
    Abstract:
    A mathematical model of Limiting Dilution Analysis for two limiting parameters is presented and investigated. Limiting Dilution Analysis is a microbiological cell assay developed for immunological application. In the given case we deal with the interaction between B lymphocytes, macrophage derived factor and T-independent antigens. The state of the art...
    Resource Type:
    Masters Thesis
    Full Text:
    Modified limiting dilution analysis : a mathematical model

  • Advanced numerical modeling of the Lorentz mixing process

    Creator:
    Hager, Michael B.
    Abstract:
    There are numerous techniques for improving the mixing of fuel and oxidant species. However, many of these methods cannot be applied to combustion systems due to material limitations. A means of mixing the reacting species without physically invading the flow stream is therefore desired. In this work, induced electromagnetic forces...
    Resource Type:
    Masters Thesis
    Full Text:
    model. Numerical experiments are performed based on a three level Box-Behnken design in which the

  • A "mildly inconsistent" method for accelerating upstream corner balance transport

    Creator:
    Gulick, John C.
    Abstract:
    A new method for accelerating the Upstream Corner Balance (UCB) discretization of the equation of transfer is introduced. The inconsistent acceleration equations for the UCB discretization are derived by applying the "Modified 4-Step" diffusion synthetic acceleration technique not to the UCB discretization, but instead to the simple corner balance (SCB)...
    Resource Type:
    Masters Thesis
    Full Text:
    ........................... 59 3.8.1 Fourier Analysis Results ...................... 59 3.8.2 Implementation Code Model Problem

  • Tracer experiments in a non-uniform porous medium : implications of diffusive mass transfer on the late-time breakthrough behavior

    Creator:
    Freiherr von Schwerin, Claudius
    Abstract:
    Mass transfer processes were evaluated in an artificial, non-uniform porous medium with a power law distribution of diffusion rate coefficients obtained from physical characterization of solute and porous medium. Breakthrough curves of several pulse experiments conducted at different velocities were compared (1) to analytical expressions for concentrations at mass transfer...
    Resource Type:
    Masters Thesis
    Full Text:
    processes, upon which the mathematical model is based on, are likely to be present in the transport medium

  • Two dimensional recursive fast Fourier transform

    Creator:
    Zhu, Feihong
    Abstract:
    Figures 5-13 in original document are black and white photocopies. Best scan available
    Resource Type:
    Masters Thesis
    Full Text:
    ,N2-1)=Z L2 (w2)F2(0,N2-1-m2) m20 =F1(0,w2). PROOF: (using mathematical induction) 1. For S2=0, Z2

  • 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:
    degree of Master of Science in Civil Engineering presented on June 9, 2016. Title: Bridge Model

  • Numerical modeling of biofilms

    Creator:
    Mendoza, Adriana
    Abstract:
    We present a new mathematical model for the development of biofilm that extends the nonlinear density-dependent continuum model introduced by Eberl et al. in 2001. It is a coupled nonlinear density-dependent diffusion-reaction model for biomass spreading, describing the interaction of nutrient availability and biomass production. The model by Eberl has...
    Resource Type:
    Masters Thesis
    Full Text:
    Abstract approved: Malgorzata S. Peszynska We present a new mathematical model for the development of