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  • Dynamical System Scaling of Fuel Performance During Reactivity Insertion Accidents

    Creator:
    Dueñas, Alexander M.
    Abstract:
    Fuel qualification timelines for new fuel technology under ideal conditions can take between 20-25 years to be fully qualified from initial concept to deployment as full fuel assemblies. To reduce the timeline and costs, new separate-effects test and integral-effects test experiments, advanced instrumentation, and advanced modeling and simulation tools are...
    Resource Type:
    Dissertation

  • Ecohydrologic Connections in Semiarid Rangeland Ecosystems in Oregon

    Creator:
    Durfee, Nicole M.
    Abstract:
    An improved understanding of the ecohydrologic relationships in semiarid rangelands is imperative for the development of effective rehabilitation and land management practices. This thesis addresses the ecohydrologic relationships of two significant issues concerning semiarid rangeland ecosystems: western juniper encroachment and increasing stream temperatures. This thesis is divided into two chapters;...
    Resource Type:
    Masters Thesis
    Full Text:
    /0012- 9615(2003)073[0223:EOARSW]2.0.CO;2. 2. Miller, R. F.; Bates, J. D.; Svejcar, T. J.; Pierson, F

  • Microstructural Characterization of Porosity in U-Mo Low Enriched Uranium Plate Fuel

    Creator:
    Westman, Bjorn E.
    Abstract:
    New low enriched uranium (LEU) fuels are being developed for replacement of high enriched uranium (HEU) fuels in high power research reactors. U-Mo LEU plate fuels have been identified as a candidate for replacement of current HEU fuels. However, U-Mo fuels tend to exhibit accelerated swelling typically at fission densities...
    Resource Type:
    Masters Thesis
    Full Text:
    )............................... 51 Figure 25. V5R050-H-VIB Image Set. (Images 1 - 10 (a – j

  • Environmental Remote Sensing with Unmanned Aircraft Systems

    Creator:
    Burnett, Jonathan D.
    Abstract:
    Small Unmanned Aircraft Systems (sUASs) equipped with optical sensors are capableof remotely sensing landscapes and wildlife at spatial and temporal resolutions that werepreviously inaccessible due to technical and budgetary limitations. Conventional remotesensing and photogrammetric workflows can be applied to the resulting high resolution imageryto facilitate new types of scientific inquiry....
    Resource Type:
    Dissertation

  • Monte Carlo studies of classical Heisenberg spins on face-centered-cubic lattices : effects of strain, interlayer coupling, and dilution of lattice

    Creator:
    Park, Seongweon
    Abstract:
    This thesis presents the results from Monte Carlo calculations on classical vector spins in face-centered-cubic (FCC) lattices. The goal of the study was to understand the effect of interlayer coupling, dilution of magnetic atoms in the lattice, and symmetry-changing strain. Experimental work by T. M. Giebultowicz et al. and J....
    Resource Type:
    Dissertation
    Full Text:
    -changing strain. Experimental work by T. M. Giebultowicz et al. and J. A. Borchers et al. greatly

  • Modeling spintronics devices in Verilog-A for use with industry-standard simulation tools

    Creator:
    Engelbrecht, Linda M.
    Abstract:
    As the semiconductor industry works to integrate increasingly more "non-CMOS" devices onto CMOS ICs, compact model development has become an important step in the circuit/system verification tool flow. This research focuses on the two- and three-dimensional modeling of the physical phenomena that occur in nanoscale magnetic devices. This includes the...
    Resource Type:
    Dissertation
    Full Text:
    for clarity. [Reprinted figure with permission from J. Xiao, A. Zangwill, M. D. Stiles, Phys. Rev. B

  • Responses and relationships among Fusarium species, sweet corn, and western spotted cucumber beetles

    Creator:
    Miller, Nathan L. (Nathan Louis)
    Abstract:
    Sweet corn (Zea mays L.) yields in the Willamette Valley of Oregon have been declining since the early 1990’s. Studies were done to determine if there is a relationship between ear weight and several disease parameters including necrotic crowns or stalk nodes, nodal root rot, radicle root rot, and sub-crown...
    Resource Type:
    Dissertation
    Full Text:
    Press. 101 pp. 3. Shane, M. W., McCully, M. E., and Canny, M. J. 2000. The vascular system of maize

  • Karl Jordan : a life in systematics

    Creator:
    Johnson, Kristin Renee
    Abstract:
    Karl Jordan (1861-1959) was an extraordinarily productive entomologist who influenced the development of systematics, entomology, and naturalists' theoretical framework as well as their practice. He has been a figure in existing accounts of the naturalist tradition between 1890 and 1940 that have defended the relative contribution of naturalists to the...
    Resource Type:
    Dissertation
    Full Text:
    problems that arise when historians unduly 19 Mayr, "Prologue," p. 6. 20 Daniel J. Kevies. "Genetics in