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  • The choice of the optimal sawtimber harvesting system (a theoretical approach based on mathematical programming)

    Creator:
    Mikkonen, Esko
    Abstract:
    An extension of the sensitivity analysis of linear programming, called parametric programming is used in determining optimal sawtimber logging system mix. The five logging systems under study are manual log-length, system, log-length processor and harvester systems, manual tree-length system and tree-length harvester system. In conditions where it is not exactly...
    Resource Type:
    Capstone Project

  • An economic model of soil compaction in forestry

    Creator:
    Stewart, Rodney Aloysius
    Abstract:
    A model is presented which predicts the net present value of a stand level multi-entry harvest plan. The model accounts for potential volume losses due to harvest-related soil compaction. The goal of this project was to answer five economic questions about the issue of soil compaction in forestry. The five...
    Resource Type:
    Capstone Project

  • The plume model for large utility scale atmospheric fluidized bed combustors

    Creator:
    Park, Dalkeun
    Abstract:
    The atmospheric fluidized bed combustor (AFBC) is an alternative to the pulverized coal burner. The size of a utility scale AFBC would be enormous so that the use of large particles is necessary to reduce its size. In modeling the combustion of coal and capture of sulfur released from the...
    Resource Type:
    Dissertation
    Full Text:
    The plume model for large utility scale atmospheric

  • Optimal harvesting of continuous age structured populations

    Creator:
    Smith, Steven J.
    Abstract:
    We investigate the optimal harvesting strategies for McKendrick type population models. Models of this type endow the population with a continuous age structure. They consist of a partial differential equation with a boundary condition which involves an integral of the solution. We study two problems, the first concerns the yield...
    Resource Type:
    Dissertation
    Full Text:
    time interval of a linear model. It is shown that an optimal policy exists, and that it consists of

  • A simulation of the operation of a log landing for a heli-stat airship in old-growth timber

    Creator:
    Gerstkemper, John C.
    Abstract:
    This paper discusses the development of a computer simulation program for the operation of a log landing for the proposed Helistat airship. The first part of the paper describes the time study used to develop production rates for the chasers, buckers, front-end loaders, and skidders to be used on the...
    Resource Type:
    Capstone Project

  • Predicting skidder productivity : a mobility approach

    Creator:
    Gibbons, Daniel J.
    Abstract:
    The principles of mobility are applied to the forest setting to simulate the movement of logs with a rubber tired-skidder. A computer program was written to perform the analysis . Vehicle-terrain and logterrain interactions are the resistances which must be overcome by the available vehicle power. The rate at which...
    Resource Type:
    Capstone Project

  • 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

  • Digital simulation of multi-dimensional random processes and its applications

    Creator:
    Ahn, Gil Soo
    Abstract:
    This dissertation introduces a method which can simulate multi-dimensional Gaussian random processes by the superposition of sine functions The fast Fourier transform technique is incorporated into the simulating method to facilitate saving of computer time. In view of the fact that the fast Fourier transform play important roles in digital...
    Resource Type:
    Dissertation
    Full Text:
    noise vector through filters. He proposed the following model (7 ): m ym(t) =E krn1(T)xm(t=7),T m

  • 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:
    estimation are examined. In addition, a pharmacokinetic model incorporating non- linear kinetics is studied

  • Passive source tracking from spatially correlated angle-of-arrival data

    Creator:
    Haisch, Hansjoerg
    Abstract:
    This thesis presents a simulation technique for the post-detection of a point-source trajectory in an isotropic, stationary random medium. The two-dimensional source location is estimated from spatially correlated angle-of-arrival data which are collected simultaneously at two sensor positions. We assume that the data are collected at discrete, constant time intervals...
    Resource Type:
    Masters Thesis
    Full Text:
    along a trajectory having constant (but unknown) radius of curvature. A mathematical model based on