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  • Shear reinforcement effects of discrete columns in liquefiable soils

    Creator:
    Rayamajhi, Deepak
    Abstract:
    Discrete columns, such as stone and soil-cement columns, are often used to improve the liquefaction resistance of loose sandy ground. In particular, stone columns are considered to increase resistance potential by densification, drainage, and reinforcement mechanisms. For silty soil, the shear stress reduction resulting from the reinforcing effect of stiffer...
    Resource Type:
    Dissertation
    Full Text:
    Discrete Columns in Liquefiable Soils. Abstract approved: Scott A. Ashford Discrete columns, such as

  • Effects of soil slope on lateral capacity of piles in cohesive soils

    Creator:
    Nimityongskul, Nontapat
    Abstract:
    Pile supported bridges are typically constructed near or in a natural or man-made slope and are subjected to lateral loading. The current design method for laterally loaded piles involves the use of Winkler's spring concept with the standard nonlinear p-y curves. The available p-y curves were developed based on results...
    Resource Type:
    Dissertation
    Full Text:
    : _____________________________________________________________________ Scott A. Ashford Pile supported bridges are typically constructed near or in a natural or

  • Seismic performance of a pile-supported container wharf structures in rockfill

    Creator:
    Kawamata, Yohsuke
    Abstract:
    Recently, the concept of performance based design has become popular for many types of structures, including port facilities under seismic loading. For the case of pile-supported wharves, the level of performance is generally estimated using the displacement capacity of the structure. Therefore, understanding soil-pile interaction is one of the most...
    Resource Type:
    Dissertation
    Full Text:
    Pile-supported Container Wharf Structures in Rockfill Abstract approved: Scott A. Ashford

  • Three-dimensional experiments and modeling of anisotropic clay

    Creator:
    Anantanasakul, Pongpipat
    Abstract:
    This dissertation presents the results of a research effort conducted to better understand the stress-strain, volume change, shear band formation, and strength characteristics of normally consolidated anisotropic clay under fully three-dimensional stress states. A series of consolidated drained true triaxial tests with a constant mean effective stress and constant Lode...
    Resource Type:
    Dissertation
    Full Text:
    : Three-Dimensional Experiments and Modeling of Anisotropic Clay Abstract approved: Scott A. Ashford

  • Development of chemostats and use of redox indicators for studying redox transformations in biogeochemical matrices

    Creator:
    Lemmon, Teresa L.
    Resource Type:
    Dissertation
    Full Text:
    studying redox transformations in biogeochemical matrices AN ABSTRACT OF THE THESIS OF Teresa L

  • Blast-induced liquefaction : observational estimation of vibration, settlement and residual pore water pressure

    Creator:
    Kato, Kengo
    Abstract:
    The blast technique has been used as an effective soil improvement method to compact loose coarse-granular soils since 1930s, and the use of the blast technique is extended as an application of in-situ liquefaction testing to investigate the performance of full scale foundations and countermeasures against liquefaction in recent decades....
    Resource Type:
    Dissertation
    Full Text:
    : _____________________________________________________________________ Scott A. Ashford and H. Benjamin Mason The blast technique has been used as an

  • Influence of silt size and content on static liquefaction potential of sand

    Creator:
    Monkul, M. Murat
    Abstract:
    Different specimen preparation methods such as moist tamping, dry funnel deposition, slurry deposition, dry air pluviation have been reported in the literature to investigate the undrained behavior of silty sands. Similarly, different means have been used to densify the soils prepared with such methods. However, the influence of the densification...
    Resource Type:
    Dissertation
    Full Text:
    . Ashford, Jerry A. Yamamuro Different specimen preparation methods such as moist

  • Ectopic overexpression of Arabidopsis CBF genes enhances freezing tolerance of two potato species

    Creator:
    Pino, María-Teresa
    Abstract:
    Solanum species differ in their degree of frost tolerance and cold acclimation capacity. Cultivated potato species of Solanum tuberosum L. are frost-sensitive, incapable of cold acclimation, and have a maximum freezing tolerance of –3°C. Solanum commersonii Dun is frost-tolerant and can survive to –5ºC pre-acclimation and –10ºC post-acclimation. Breeding attempts...
    Resource Type:
    Dissertation
    Full Text:
    ] AN ABSTRACT OF THE DISSERTATION OF María-Teresa Pino for the degree of Doctor of Philosophy in

  • Investigating science identity and motivation constructs in undergraduate chemistry through novel instrument development

    Creator:
    Wolfe, Teresa M.
    Abstract:
    The purposes of this study were to: 1) determine in what ways incorporating active engagement into a traditional lecture chemistry course contributed to students' science identity and their motivation to learn the science, and 2) determine how the development of a science identity could be measured through the use of...
    Resource Type:
    Dissertation
    Full Text:
    DISSERTATION OF Teresa M. Wolfe for the degree of Doctor of Philosophy in Science Education presented on June

  • Becoming birds: community scientists, place, and critical socio-ecoliteracy

    Creator:
    Wicks, Teresa O.
    Abstract:
    Community science (also called citizen science) has become an increasingly popular data collection technique for scientists researching nature at a large scale. Many ecologists have also looked to community science as a method for educating the public about science. Over the past several decades, researchers have attempted to define an...
    Resource Type:
    Dissertation
    Full Text:
    AN ABSTRACT OF THE DISSERTATION OF Teresa ‘Bird’ Wicks for