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  • Estimating spatial changes in acoustic velocity in felled Douglas-fir stems

    Creator:
    Dowding, Bodie
    Abstract:
    To compete with other building materials, the wood products industry must find a way to increase value and lower costs. Wood stiffness is important for most wood uses. Value can be increased and costs can be lowered by sorting logs for stiffness in the woods using acoustic devices mounted on...
    Resource Type:
    Masters Thesis
    Full Text:
    Douglas-fir Stems Abstract approved: Glen Murphy To compete with other building materials

  • Stiffness of Douglas-fir lumber : effects of wood properties and genetics

    Creator:
    Vikram, Vikas
    Abstract:
    Wood stiffness is one of the most important properties of lumber and veneer. We studied wood stiffness (modulus of elasticity, MOE), wood density, microfibril angle, and knots in a 25 year-old wind pollinated progeny test (50 families, ~ 373 trees) of coastal Douglas-fir to understand the potential for genetically improving...
    Resource Type:
    Masters Thesis
    Full Text:
    : Stiffness of Douglas-fir Lumber: Effects of Wood Properties and Genetics. Abstract approved

  • Evaluation of a prototype NIR system for Douglas-fir wood density estimation

    Creator:
    Belart Lengerich, Maria Francisca
    Abstract:
    Forest products companies in the U.S. face vigorous competition from other wood producers around the world and other industries (steel, aluminum, plastics, composites). To be competitive, forest companies need to control costs, sort and allocate logs to the most appropriate markets, and recover more value at time of harvest. Interest...
    Resource Type:
    Masters Thesis
    Full Text:
    for Douglas-fir Wood Density Estimation. Abstract approved: Glen E. Murphy Forest

  • In-forest log segregation based on acoustic measurement of wood stiffness

    Creator:
    Amishev, Dzhamal Y.
    Abstract:
    To remain competitive, the forest products industry needs to look for new and innovative processes and technologies to not only reduce costs but also to recover more value through the entire seedling-to-customer forest products supply chain. It is well recognized that measuring wood properties of logs in real time during...
    Resource Type:
    Dissertation
    Full Text:
    modulus of elasticity (MOE), also known as stiffness, is an important mechanical property and is the

  • Using Acoustic Measurements and Inventory Data to Estimate Stiffness in Standing Douglas-Fir Trees

    Creator:
    Delgado Trejo, Jorge Luis
    Abstract:
    Total US lumber production in 2011 was 77.9 million cubic meters. Its primary use was for housing and construction. There is a growing concern that the structural properties for wood are being reduced as trees are harvested at much younger ages as the wood supply shifts from older to younger...
    Resource Type:
    Masters Thesis
    Full Text:
    Stiffness in Standing Douglas-Fir Trees. AN ABSTRACT OF THE THESIS OF Jorge Luis Delgado Trejo

  • Early genetic selection for wood stiffness in juvenile Douglas-fir and western hemlock

    Creator:
    Urhan, Oguz S.
    Abstract:
    Wood modulus of elasticity (MOE), also known as wood stiffness, is one of the most important wood properties. Wood stiffness is a measure of the resistance to deflection, and is important because some products such as laminated veneer lumber, plywood, and dimension lumber require stiff and strong wood. Incorporating wood...
    Resource Type:
    Masters Thesis
    Full Text:
    Douglas fir and Western Hemlock. AN ABSTRACT OF THE THESIS OF Oguz S. Urhan for the degree of