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  • Application of GNSS for Vertical Reference Determination

    Creator:
    Kim, Su-Kyung
    Abstract:
    Vertical datum is a reference system used for specifying the elevation of specific points on or near the Earth. Precise and accurate definition and realization of vertical references are, therefore, crucial to ensure consistency between height measurements. The vertical datums can be divided into two categories: 1) vertical geodetic datums...
    Resource Type:
    Dissertation
    Full Text:
    February 25, 2021. Title: Application of GNSS for Vertical Reference Determination. Abstract

  • Historical disturbance regimes as a reference for forest policy

    Creator:
    Thompson, Jonathan R.
    Abstract:
    Using the historical range of forest conditions as a reference for managing landscapes has been proposed as a "coarse-filter" approach to biodiversity conservation. By emulating historical disturbance processes, it is thought that forest management can produce forest composition and structure similar to the conditions that once supported the native biota....
    Resource Type:
    Masters Thesis
    Full Text:
    Disturbance Regimes as a Reference for Forest Policy Abstract approved: ____________________ _ K. Norman

  • An ultra low power frequency reference for timekeeping applications

    Creator:
    Oporta, Hector Ivan
    Abstract:
    An ultra low power crystal oscillator that provides a frequency reference for battery powered timekeeping applications is presented. An amplitude control circuit is employed to ensure that minimum current is consumed. A subthreshold voltage regulator provides a supply voltage for the oscillator with minimum current consumption. The oscillator and regulator...
    Resource Type:
    Masters Thesis
    Full Text:
    Ultra Low Power Frequency Reference For Timekeeping Applications Abstract approved: Terri S. Fiez

  • Effects of pesticides on amphibians with special reference to the pyrethroidinsecticide, cypermethrin

    Creator:
    Biga, Lindsay M.
    Abstract:
    Pollution by pesticides is a ubiquitous concern for wildlife. The effects of pesticides are especially concerning in aquatic environments, which are particularly vulnerable as they have several exposure routes for the influx of chemicals. These effects are of particular concern as biodiversity loss reaches unprecedented rates. This includes recent declines...
    Resource Type:
    Dissertation
    Full Text:
    . Biga for the degree of Doctor of Philosophy in Environmental Science presented on November 5, 2013

  • Comparison of dosimetric modeling of the International Commission on Radiological Protection trout reference animal

    Creator:
    Comolli, Michelle LeAnne
    Abstract:
    Radiation protection has historically been from a human protection approach, therefore many studies have neglected the potential dose contribution from the gastrointestinal tract (GIT) in animal studies. The International Commission on Radiological Protection (ICRP) utilized simplified geometric shapes with Dose Conversion Factors (DCF) based on homogenized models for the trout...
    Resource Type:
    Masters Thesis
    Full Text:
    .............................................................................. 40 Table 5: Reference Trout DCFs (Cs-137

  • Spatial relationships for vegetation in restored and reference salt marshes in the Salmon River Estuary, Oregon

    Creator:
    Chellew, Megan
    Abstract:
    In this thesis, the spatial patterns of vegetation and soils of reference and restored tidal marshes were compared to determine the extent to which restored sites differ from the reference site after 40 years of restoration. Vegetation surveys of 1m x 1m plots were conducted along previously-established transects of salt...
    Resource Type:
    Masters Thesis
    Full Text:
    Relationships for Vegetation in Restored and Reference Salt Marshes in the Salmon River Estuary, Oregon

  • An Ecoregion-Based Reference Condition and Classification Scheme for Determining Nutrient Criteria in Oregon Lakes

    Creator:
    Brenner, Jacqueline M.
    Abstract:
    The anthropogenic introduction of nutrients to water bodies has been shown to alter the structure and function of natural aquatic ecosystems, yet national EPA lake and reservoir nutrient criteria remain too broad for effective regional water quality management. This study uses a reference site approach to propose numeric nutrient criteria...
    Resource Type:
    Masters Thesis
    Full Text:
    ……………………………………………...62 Chapter 5 Discussion…………………………………………………………………………...66 Reference Strategy Comparison

  • Exploring the Differences between Lagrangian and Eulerian Reference Frames for Stream Temperature Data

    Creator:
    Egan, Fey Frentress
    Abstract:
    Stream temperature research relies on reference frames in which to project data. An important decision in the project design is which frame of reference to use. This aspect of research planning is not always given the consideration of thought that would lead to the best decision. In this thesis, two...
    Resource Type:
    Honors College Thesis
    Full Text:
    ................................................................................................................................................... 5 Reference Frames

  • Site specific reference person parameters and derived concentration standards for the Savannah River site

    Creator:
    Stone, Daniel K.
    Abstract:
    The U.S. Department of Energy (DOE) Order 458.1 states that the compliance with the DOE annual dose limit of 1 mSv (100 mrem) to a member of the public may be demonstrated by calculating dose to the maximally exposed individual (MEI) or to a representative person. Historically, the MEI concept...
    Resource Type:
    Masters Thesis
    Full Text:
    Chapter 5. Uses for the reference person parameters and DCS, and discussion of conservatism of dose

  • Evaluation of grapevine red blotch virus epidemiology with reference to potential insect vectors

    Creator:
    Dalton, Daniel T.
    Abstract:
    Grapevine red blotch virus (GRBV), the causal agent of red blotch disease (RBD) in grapevine, Vitis vinifera L., is an emerging pathogen of significance to the wine grape industry of Oregon, USA. To address knowledge gaps of GRBV epidemiology, spread of GRBV was evaluated in Oregon vineyards over four years....
    Resource Type:
    Dissertation
    Full Text:
    14, 2020. Title: Evaluation of Grapevine red blotch virus Epidemiology with Reference to