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  • Non-linear nitrogen dynamics and calcium depletion along a temperate forest soil nitrogen gradient

    Creator:
    Sinkhorn, Emily R.
    Abstract:
    Understanding how N availability influences base cation stores is critical for long-term ecosystem sustainability. Indices of nitrogen (N) availability and the distribution of nutrients in plant biomass, soil, and soil water were examined across ten young, unpolluted Douglas-fir (Pseudotsuga menziesii) stands in the Oregon Coast Range spanning a three-fold soil...
    Resource Type:
    Masters Thesis
    Full Text:
    fertility and maximize stand productivity and long-term sustainability. References Aber, J., K

  • Volume analysis and visualization

    Creator:
    Khare, Ankit
    Abstract:
    3D datasets acquire great importance in the context of medical imaging. In this thesis we survey and enhance solutions to problems inherently associated with 3D datasets-processing time,noise and visualization. Efforts include development of a tool kit to provide a multi-threaded processing platform to cut processing time, produce real time visualization...
    Resource Type:
    Masters Thesis
    Full Text:
    Ron Metoyer, Dr Michael J. Quinn and Dr Michael K. Gross for their time and inputs. TABLE OF

  • Comparison of Dorper and Polypay as maternalsire breeds for reduced input lamb production

    Creator:
    Haas, Joel D.
    Abstract:
    During years 2005, 2006, and 2007 ewes of predominantly Polypay breeding were bred to either Dorper or Polypay rams for spring lambing. Ewes were assigned to single-sire mating groups based on age and genotype. Internally generated replacements were added to the flock for the 2007 lambing season and bred to...
    Resource Type:
    Masters Thesis
    Full Text:
    insight and advice during graduate coursework. The gracious efforts of Dr. Michael Borman in

  • A data-driven model of pedestrian movement

    Creator:
    Casburn, Ledah
    Abstract:
    This thesis presents a model for simulating individual pedestrian motion based on empirical data. The model keeps track of a pedestrian’s position, orientation, and body configuration and leverages motion capture data to generate plausible motion. Our model can automatically incorporate a pedestrian’s physical limitations when making movement decisions, since it...
    Resource Type:
    Masters Thesis
    Full Text:
    and natural. . . . . . . . . . . . . . . . . . . 13 3.3 For the transition from pose i to pose j to

  • Geochemical and helium isotopic variability within the Lau Basin

    Creator:
    Goddard, Charlotte Ives
    Abstract:
    This research incorporates geochemical and helium isotopic analyses of Lau Basin volcanic glasses, along with helium isotopic analyses of water column hydrothermal plumes to better understand the processes that control the formation and evolution of this backarc basin. Lavas newly collected from the four southernmost segments of the Valu Fa...
    Resource Type:
    Dissertation
    Full Text:
    . Adam J. R. Kent assisted data analysis for and with the writing of Chapter 2. Dr. Richard J. Arculus

  • Behavioral adaptations and the minimization of reproductive costs in the male red-sided garter snake, Thamnophis sirtalis parietalis.

    Creator:
    O'Donnell, Ryan P.
    Abstract:
    The benefits of reproduction are clear, but there are also costs. Much is known about the costs of reproduction in females, but only recently have male costs been investigated in any depth. These costs of reproduction may be minimized by appropriately modifying behavior, but there has been little research on...
    Resource Type:
    Masters Thesis
    Full Text:
    thank the other members of my committee, Steve Arnold, Andy Blaustein, and Michael Burgett for their

  • Validation of elk distribution models at Sled Springs Wildlife Demonstration Area, northeast Oregon

    Creator:
    Coe, Priscilla K.
    Abstract:
    Landscape models for elk distribution developed at Starkey Experimental Forest and Range from 1993-1995 were tested on another landscape during 2003-2005 at Sled Springs Wildlife Demonstration Area. Using location data obtained from 23 wild elk captured and fitted with GPS telemetry collars, 8 spatial resource selection function models representing 8...
    Resource Type:
    Masters Thesis
    Full Text:
    appropriately used with individual animals or sub-herds that use the same space (G. Roloff, pers comm., J

  • Supplemental feeding influences reproductive success of the Hawaiian goose (Branta sandvicensis) at Haleakala National Park, Maui, Hawai'i

    Creator:
    Tamayose, Joy
    Abstract:
    Low reproductive success has been typical of high elevation populations of the Hawaiian goose (Branta sandvicensis) or nēnē. Researchers identified predation and inadequate nutrition as limiting factors. Reproductive success remained low in most years despite on-going predator control programs. I used a supplemental feeding program over two breeding seasons in...
    Resource Type:
    Masters Thesis
    Full Text:
    ACKNOWLEDGEMENTS Mahalo nui loa to Cathleen Bailey, Ronald J. Nagata, Sr., and the Endangered Species

  • Defining intensity of skeletal loading in children

    Creator:
    Bauer, Jeremy J.
    Abstract:
    While exercise can be prescribed for improving cardiovascular and muscle health, no prescription exists for increasing bone mass. Because bone deformation rate has been identified as an important variable related to osteogenesis, estimates of skeletal loading during human activities likely characterize the associated osteogenic stimulus. However, estimates of body segment...
    Resource Type:
    Dissertation
    Full Text:
    consists of Wilson C. “Toby” Hayes, Christine M. Snow, Michael J. Pavol, Mark F. Costello and Elizabeth

  • Three-dimensional motion of the center of mass and energetic cost across a variety of walking speeds : a comparison between adults with and without Down syndrome

    Creator:
    Agiovlasitis, Stamatis
    Abstract:
    It has been previously suggested that the walking pattern of individuals with Down syndrome is inefficient. This is thought to result from increased instability, particularly in the medio-lateral direction, due to the characteristic joint laxity and muscle hypotonia of individuals with DS. Therefore, this work was an attempt to gain...
    Resource Type:
    Dissertation
    Full Text:
    findings. Dr. Michael J. Pavol, Dr. Jeffrey Widrick, and Dr. Joonkoo Yun provided guidance in