350 research outputs found

    Hydrodynamic modeling of tsunamis from the Currituck landslide

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    This paper is not subject to U.S. copyright. The definitive version was published in Marine Geology 264 (2009): 41-52, doi:10.1016/j.margeo.2008.09.005.Tsunami generation from the Currituck landslide offshore North Carolina and propagation of waves toward the U.S. coastline are modeled based on recent geotechnical analysis of slide movement. A long and intermediate wave modeling package (COULWAVE) based on the non-linear Boussinesq equations are used to simulate the tsunami. This model includes procedures to incorporate bottom friction, wave breaking, and overland flow during runup. Potential tsunamis generated from the Currituck landslide are analyzed using four approaches: (1) tsunami wave history is calculated from several different scenarios indicated by geotechnical stability and mobility analyses; (2) a sensitivity analysis is conducted to determine the effects of both landslide failure duration during generation and bottom friction along the continental shelf during propagation; (3) wave history is calculated over a regional area to determine the propagation of energy oblique to the slide axis; and (4) a high-resolution 1D model is developed to accurately model wave breaking and the combined influence of nonlinearity and dispersion during nearshore propagation and runup. The primary source parameter that affects tsunami severity for this case study is landslide volume, with failure duration having a secondary influence. Bottom friction during propagation across the continental shelf has a strong influence on the attenuation of the tsunami during propagation. The high-resolution 1D model also indicates that the tsunami undergoes nonlinear fission prior to wave breaking, generating independent, short-period waves. Wave breaking occurs approximately 40–50 km offshore where a tsunami bore is formed that persists during runup. These analyses illustrate the complex nature of landslide tsunamis, necessitating the use of detailed landslide stability/mobility models and higher-order hydrodynamic models to determine their hazard.Research conducted by Lynett for this paper was partially supported by grants from the National Science Foundation (CBET- 0427014, CMMI-0619083)

    Ride like a girl: A narrative exploration of women in the rodeo

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    The purpose of this qualitative narrative inquiry was to 're-present' women's rodeo stories, illustrating and unpacking the meaning they narrated from within the masculinized arena. Ten cowgirls, 6 White and 4 Native American/First Nation, were engaged through in-depth interviews and three participated in photo elicitation. They compete in barrel racing, breakaway roping, saddle bronc riding, and raised bucking bulls. I present the cowgirls' storied experiences using a narrative inquiry approach modeled after Clandinin and Connelly's (2000). I drew from feminist theory, social capital, and thematic analysis to make meaning of the narratives that I and the participants co-created. An all-encompassing theme of Learning the Ropes emerged through data analysis focusing on how the participants narrate their nonformal and informal learning experiences in the rodeo, the techniques they used to navigate the masculinized arena, how they resisted hegemonic rodeo norms, and their learning throughout these processes. Women described the importance of their identities as cowgirls, their family involvement in the rodeo, and their hard work to excel in rodeo. Their experiences legitimize their place in the arena. This study evolved from its beginning emphasis on the rodeo's masculine and patriarchal characteristics to find women's experiences of agency, freedom, and joy in rodeo. This study contributes to the limited scholarship on women in the rodeo, how women create a sense belonging in a traditionally masculine sport, and women's learning within and about rodeo

    Enfoques de enseñanza y aprendizaje de la medicina. El caso del programa de Medicina de la Universidad del Tolima

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    enseñanza y aprendizaje que se privilegian en los procesos de formación en el programa de Medicina de la Universidad del Tolima, con el fin de generar nuevos conocimientos que redunden en la calidad de la formación del médico de esta institución educativa.El estudio encontró que la concepción predominante en relación con la enseñanza se caracterizó como aquella de tipo expositivo y unidireccional; el profesor trata de transmitir sus conocimientos por medio de clases magistrales y le da gran importancia a la manera cómo se presentan los contenidos. En cuanto al aprendizaje, se halló una importante tendencia hacia la superficialidad, de tipo memorístico no reflexivo y reproductivo. Las particularidades de la enseñanza del profesor repercuten con clara influencia en el enfoque de aprendizaje adoptado por el estudiante y en la calidad de los resultados, por lo cual es de importancia la reflexión sobre cómo se enseña. Dentro de esta perspectiva, se debe estimular la motivación intrínseca para que el estudiante adopte estrategias profundas de aprendizaje con el fin de lograr aprendizajes de calidad.Las características de la enseñanza médica encontrada en la Universidad del Tolima se constituyen en un fiel reflejo de aquello que ocurre en muchas de las facultades de Medicina del continente latinoamericano, y que de persistir estas estrategias de enseñanza podrían tener resultados funestos en la atención de la salud, especialmente de la poblaciónvulnerable

    Ionic Conductivity in Bragg Glasses

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