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Filtering by: Creator Andrews, John T. Remove constraint Creator: Andrews, John T. Committee Member Sessions, John Remove constraint Committee Member: Sessions, John

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  • Wood properties and use of sensor technology to improve optimal bucking and value recovery of Douglas-fir

    Creator:
    Acuna, Mauricio A.
    Abstract:
    There are a number of wood properties which affect the quality of forest products such as lumber and pulp. Of these, wood density is considered by some to be the single most important physical characteristic because it is an excellent predictor of strength, stiffness, hardness, and paper-making capacities. Accurately assessing...
    Resource Type:
    Dissertation
    Full Text:
    to express my gratitude to my committee members, Dr. John Sessions, Dr. Temesgen Hailemariam, Dr

  • An analysis of technical efficiency and productivity growth in the Pacific Northwest sawmill industry

    Creator:
    Helvoigt, Ted L.
    Abstract:
    The objective of this project was to investigate technical efficiency and productivity growth in the Pacific Northwest sawmilling industry over the period 1968-2002. Productivity growth was decomposed into three components: technical change, efficiency change, and scale efficiency change. In addition, using econometric methods, changes in output elasticities and input substitution...
    Resource Type:
    Dissertation
    Full Text:
    dissertation. These include: Dr. Richard Haynes of the U.S. Forest Service, Dr. John Sessions of the Forest

  • The economics of carbon sequestration in western Oregon forests

    Creator:
    Im, Eun Ho
    Abstract:
    This study considered regional forest policies for sequestering carbon in existing forests in western Oregon. A model of log markets in western Oregon was employed to examine the impacts of forest policy changes on future carbon stock, harvests, and management activities. A carbon tax program, as a mitigation option for...
    Resource Type:
    Dissertation
    Full Text:
    , John Sessions, and Claire Montgomery, for developing and expanding my research ideas and allowing

  • 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:
    . Barb Lachenbruch, Dr. Loren Kellogg, Dr. David Mok, Dr. Todd Scholz, and Dr. John Sessions provided

  • 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:
    committee members: Dr. John Sessions, for sharing his knowledge with me and also being so patient, kind

  • Optimizing the primary forest products supply chain : a multi-objective heuristic approach

    Creator:
    Hamann, Jeff D.
    Abstract:
    This thesis is a collection of four submitted manuscripts that present methods to assist forest ecosystem service managers wanting to develop operational sampling, monitoring, and production plans for a set of specific quantifiable ecosystem services, which are formulated as a series of general multi-objective optimization problems. The problems are solved...
    Resource Type:
    Dissertation
    Full Text:
    like to thank my Major Professor Kevin Boston, my Graduate Com- mittee: John Sessions, Lisa Madsen

  • An application of regression tree methodology in freeway travel time estimation using speed as a proxy

    Creator:
    Wang, Lijuan
    Abstract:
    Accurate freeway travel time estimation is of increasing importance for the travelers’ information and route guidance system. A non-parametric statistical methodology known as regression trees is deployed in this research for dynamically and accurately estimating freeway travel times for the I5-I205 loop in the Portland Metro area of Oregon using...
    Resource Type:
    Masters Thesis
    Full Text:
    committee members: Dr. Lan Xue, my Minor Professor, Dr. David Kim, my committee member, and Dr. John

  • Radiative forcing and forest climate policy

    Creator:
    Thompson, Matthew P.
    Abstract:
    This thesis is comprised of two manuscripts that relate to forest-based management strategies in the context of market-based climate change mitigation policies. The work questions the appropriateness of a singular focus on carbon sequestration given the albedo effect and its possible countervailing climatic impacts. Through a review of salient literature...
    Resource Type:
    Masters Thesis
    Full Text:
    expresses sincere gratitude to co-authors and mentors K. Norman Johnson and John Sessions. Lastly, thanks

  • Environmental durability of reinforced concrete deck girders strengthened with surface-bonded carbon fiber-reinforced polymer

    Creator:
    Sopal, Gautam Jayant
    Abstract:
    Long-term durability of surface-bonded carbon fiber-reinforced polymer (CFRP) for shear strengthening of reinforced concrete (RC) bridge members remains uncertain due to the limited field experience with these materials. This paper provides experimental results from the testing of full-scale RC bridge girder specimens after exposure to prolonged environmental exposure and combined...
    Resource Type:
    Masters Thesis
    Full Text:
    CFRP strengthened T specimens with freeze-thaw exposure exhibited lower shear capacity than similar

  • Measuring costs of sequestering carbon in forest stands with different management regimes in western Oregon

    Creator:
    Zyrina, Olga A.
    Abstract:
    This project was a part of larger work that compared major factors controlling patterns of carbon dynamics in two regions of the globe, the Pacific Northwest, USA and northwestern Russia. It was funded through the NASA foundation (grant # NAG5- 6242). Human economic activity is causing the release of pollutants...
    Resource Type:
    Masters Thesis
    Full Text:
    are Mark Harmon, Joe Kerkvliet, Doug Brodie, and John Sessions. My work would not be done without