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  • Shallow Aquifer Recharge from Irrigation in a Semi-arid Agricultural Valley in New Mexico, USA

    Creator:
    Ochoa, Carlos G., Fernald, Alexander G., Guldan, Steven J., Tidwell, Vincent C., and Shukla, Manoj K.
    Abstract:
    Irrigation percolation can be an important source of shallow aquifer replenishment in arid regions of the southwestern United States. Aquifer recharge derived from irrigation percolation can be more significant in fluvial valleys overlying shallow aquifers where highly permeable soils allow rapid water infiltration and aquifer replenishment. We used data from...
    Resource Type:
    Article
    Full Text:
    AGRICULTURAL VALLEY IN NEW MEXICO, USA 2 Carlos G. Ochoa1, Alexander G. Fernald2, Steven J. Guldan3, Vincent

  • The Alexander polynomial

    Creator:
    Scherich, Nancy
    Abstract:
    The Alexander polynomial is a well understood classical knot invariant with interesting symmetry properties and recent applications in knot Floer homology. There are many different ways to compute the Alexander polynomial, some involving algebraic techniques and others more geometric or combinatorial approaches. This is an interesting example of how different...
    Resource Type:
    Capstone Project
    Full Text:
    (X) =< t >. THE ALEXANDER POLYNOMIAL 3 Proof. A Wirtinger presentation of G is (b1, , bk : r1

  • Water quality effects of hyporheic processing

    Creator:
    Fernald, Alexander, Landers, Dixon, and Wigington, P.J.
    Abstract:
    Water quality changes along hyporheic flow paths may have important effects on river water quality and aquatic habitat. Previous studies on the Williamette River, Oregon, showed that river water follows hyporheic flow paths through highly porous deposits created by river channel meandering. To determine water quality changes associated with hyporheic...
    Resource Type:
    Technical Report

  • Verifying safe use of a thinner aluminum scattering chamber for fission physics

    Creator:
    Porter, Eben, Jr.
    Abstract:
    This thesis describes calculations done to determine the radiation hazard of the current Prompt Gamma Neutron Activation Analysis (PGNAA) scattering chamber at the Oregon State TRIGA Reactor (OSTR) and compare it to the amount that would be given off by a new thin-walled chamber design. These calculations were completed with...
    Resource Type:
    Masters Thesis
    Full Text:
    : ______________________________________________________ Alexander Chemey Abstract This thesis describes calculations done to determine the

  • College Student Services Administration Program Portfolio

    Creator:
    Green, Michael
    Abstract:
    This work is a representation of my competencies, experiences, reflections and learning through the College Student Services Administration Master’s of Education program at Oregon State University. This paper consists of both research and reflective writing and demonstrates in-depth my learning and development over the past two years in the College...
    Resource Type:
    Capstone Project
    Full Text:
    .......................................................................................................................146 Appendix G

  • A second look at Alexander Pope and Newtonian science

    Creator:
    Reid, Tim S.
    Abstract:
    "This Long Disease, My Life": Alexander Pope and the Sciences by Marjorie Nicolson and G.S. Rousseau has been the standard work on Alexander Pope and Newtonian science ever since it was published in 1968. Literary scholars and biographers continue to be swayed by its influence. Unfortunately, the work they so...
    Resource Type:
    Masters Thesis
    Full Text:
    Master of Arts in General Science presented on July 6, 1995. Title: A Second Look at Alexander Pope and

  • Ensemble-variational data assimilation for dynamically challenging coastal ocean circulation

    Creator:
    Pasmans, Ivo
    Abstract:
    Currently, forecasts produced by the Oregon-Washington (OR-WA) Coastal Ocean Forecast System are constrained by assimilation of only surface observations. The 4-dimensional variational (4DVAR) data assimilation (DA) algorithm is utilized to combine the model and the data, with the time-independent forecast ("background'') error covariance B. In this study, two possible improvements...
    Resource Type:
    Dissertation
    Full Text:
    Circulation Abstract approved: Alexander L. Kurapov Currently, forecasts produced by the Oregon-Washington

  • Applications of mathematical programming techniques in optimal power flow problems

    Creator:
    Li, Ruqi
    Abstract:
    In the past two decades, a great amount of attention has been paid to investigating the economic and safe operation of power systems using modern mathematical techniques. The classic economic dispatch problem, now often called the Optimal Power Flow problem, has been formulated as a mathematical optimization problem and has...
    Resource Type:
    Masters Thesis
    Full Text:
    Ruqi Li ACKNOWLEDGEMENT I am grateful to Dr. G.C. Alexander, my major professor and thesis advisor

  • Analysis and synthesis of exponentially tapered, nonuniform transmission line impedance transformers

    Creator:
    David, Frank Kolar
    Abstract:
    The exponentially tapered, nonuniform transmission' line, applied as an impedance transformer, is analyzed and modified. The analysis develops an expression for the input reflection coefficient that has the magnitude and phase as distinct functions. This allows ease in comparing the approximate and exact solutions and in developing the S-parameters for...
    Resource Type:
    Masters Thesis
    Full Text:
    Impedance Transformers Abstract approved: Signet re) (Gerald C. Alexander) The exponentially tapered

  • Coastal ocean variability inferred from high resolution models : two case studies

    Creator:
    Mauch, Matthew L.
    Abstract:
    In this thesis, high resolution ocean models are used to evaluate and forecast coastal ocean variability in two different applications. In the first study, the 2-km resolution ocean circulation model for the Eastern Bering Sea is utilized to understand whether slope-interior exchange along the path of the Aleutian North Slope...
    Resource Type:
    Masters Thesis
    Full Text:
    : ______________________________________________________ Alexander L. Kurapov In this thesis, high resolution ocean models are used to evaluate and