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  • Multi-temporal LiDAR Analysis of Landscape Fire Effects in Southwestern Oregon

    Creator:
    Hoe, Michael
    Abstract:
    Quantitative assessments of post-fire effects are key to improving our understanding of ecosystem resilience. While remote sensing technology has allowed us to assess post-fire landscape effects, we are often limited by the lack of information related to pre-fire forest attributes. As a result, our ability to interpret fire effects in...
    Resource Type:
    Masters Thesis
    Full Text:
    , Jon Buzawa, and Amanda Gray for a great field season and high quality work; David Bell, David

  • Effect of Fire Severity on Forest Development in a Mature Douglas-fir Forest in Western Oregon

    Creator:
    Hidzick, Maxim S.
    Abstract:
    Wildfires can create alternative pathways for forest development, and wildfires have expanded in size, frequency, intensity, and severity across the western United States. The purpose of this paper is to compare forest development of a mature Douglas-fir forest in western Oregon across fire severities. Postburn field measurements were collected in...
    Resource Type:
    Honors College Thesis
    Full Text:
    _____________________________________________________________________ David M. Bell, Committee Member, representing U.S. Forest Service Pacific Northwest Research

  • Biodiversity Responses in Early Seral Forests of the Klamath-Siskiyou: Comparisons with Birds, Bees, and Ground Beetles among Post-fire, Salvage Logging, and Intensive Forest Management Environments

    Creator:
    Frank, Graham S.
    Abstract:
    Early seral forests regenerating from stand-replacing disturbances provide unique habitat for many species in productive, temperate forest landscapes and contribute to supporting biodiversity. Population declines in some species associated with early seral forests have prompted concerns about the conservation of these habitats, particularly the characteristic structural and compositional complexity associated...
    Resource Type:
    Dissertation
    Full Text:
    graduate committee (Drs. Matt Betts, AJ Kroll, Jim Rivers, David Bell, Matt Powers) and other co-PIs on

  • Transformation of Western Hemlock Tree Crowns by Dwarf Mistletoe

    Creator:
    Calkins, Stephen J.
    Abstract:
    Hemlock dwarf mistletoe (Arceuthobium tsugense subsp. tsugense) is an arboreal, hemiparasitic plant that principally parasitizes western hemlock (Tsuga heterophylla). Hemlock dwarf mistletoe exerts a profound influence on infected trees that can drastically change the structure of the tree crown due to reduced growth, top dieback, branch deformation and death, resulting...
    Resource Type:
    Masters Thesis
    Full Text:
    : _____________________________________________________________________ David C. Shaw Hemlock dwarf mistletoe (Arceuthobium tsugense subsp. tsugense) is an

  • Stochastic Characterization of Highway Capacity and Its Applications

    Creator:
    Dong, Shangjia
    Abstract:
    Highway capacity has traditionally been treated as deterministic. In reality, however, capacity can vary from time to time and location to location due to inclement weather, various driving behavior, traffic incident, bottleneck and workzone. This thesis aims to characterize the stochastic variations of highway capacity, and explore its applications. The...
    Resource Type:
    Masters Thesis
    Full Text:
    be beneficial to my whole career. I also would like to thank my committee members, Dr. David

  • EMD based hybrid models in short term traffic speed forecast

    Creator:
    Liu, Lu
    Abstract:
    Short-term freeway traffic speed prediction is essential to improving mobility and safety. It has been a challenging, yet unresolved issue. Traffic speed prediction can be applied to enhance the intelligent freeway traffic management and control for applications as operational and regulation planning. For example, with more reliable traffic speed prediction,...
    Resource Type:
    Masters Thesis
    Full Text:
    dedication that Dr. Chris Bell, Dr. Salvador Hernandez, Dr. David Hurwitz, Dr. Hunter-Zaworski, and Dr

  • Test method to determine the degree of asphalt stripping from aggregates

    Creator:
    Boudreau, Richard L.
    Abstract:
    Moisture damage has long been recognized as one of the most critical factors influencing the performance of asphalt concrete (AC) pavements. This moistureinduced damage occurs from either the physical separation of the asphalt film from the aggregate or the softening of the asphalt binder within the AC mixture in the...
    Resource Type:
    Masters Thesis
    Full Text:
    David Faulkenberry, Dr. Chris Bell, and Dr. Bob Leichti for their active participation on the graduate

  • Relationship between pore size, particle size, aggregate size and water characteristics

    Creator:
    Wu, Laosheng
    Abstract:
    Soil pore size distribution and water characteristics are important for water storage, water movement, and soil-plant interaction studies. Laboratory determinations of water characteristics and pore size distribution are time consuming and costly. Investigators have proposed many models to predict them from routinely available data. Most of the models are related...
    Resource Type:
    Masters Thesis
    Full Text:
    , Dr. David Thomas, and Dr. Christopher Bell for their advice, sugges- tions and careful review of the

  • Planning of a secondary road network for low speed vehicles in small or medium-sized city

    Creator:
    Jannat, Mafruhatul
    Abstract:
    In response to the growing environmental concern and higher operating cost of regular automobile, the concept of Low-Speed Vehicles (LSVs) is becoming popular as a sustainable mode of transportation. Primarily designed for protected environments and gated communities, the use of these vehicles is gradually increasing on public roadways as a...
    Resource Type:
    Masters Thesis

  • Improving Fatigue Cracking and Moisture Resistance of Asphalt Mixtures

    Creator:
    Obaid, Ihsan A.
    Abstract:
    The resistance of asphalt concrete pavement to distresses such as fatigue cracking and permanent deformation is governed by how well the structure can resist loading under a variety of traffic and climate-related conditions. Asphalt binder type and content are typically the variables that pavement engineers can manipulate to render the...
    Resource Type:
    Dissertation
    Full Text:
    gratitude to the members of my Ph.D. committee, Dr. Chris A. Bell, Dr. David S. Hurwitz, Dr. Salvador