1,721,086 research outputs found

    Flowslides In Pyroclastic Soils: Transition from “Static Liquefaction” to “Fluidization”

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    Flowslide triggering is usually considered well distinct from subsequent propagation; however the lesson learned from some study cases from a wide hilly area of the Campania Plain, repeatedly struck in the past by catastrophic flowslides involving initially unsaturated granular soils of pyroclastic origin and triggered by severe and longlasting rainfall, is that differentiation between triggering and run-out phases may not completely be warranted, as triggering itself, instead of being represented by a single event, should better designate the accomplishement of an evolutive process, starting from an instability situation – where instability develops in the form of inability to sustain the current deviator stress (static liquefaction) - and culminating in a fluidized state, sustained by continuously generated pore pressure excesses. Laboratory triaxial and flume tests, assisted by a convenient theoretical interpretation, revealed to be sufficiently suitable to adequately investigate the phenomenon

    Marmo e scultura a Leptis Magna: un’analisi alla luce di nuovi dati archeometrici

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    Marmo e sculture a Leptis Magna - Tripolitania - Libia: un'analisi alla luce dei nuovi dati archeometrici

    Going Beyond Counting First Authors in Author Co-citation Analysis

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    The present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed

    Variations on the Author

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    “Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship

    Radiated Immunity Testing of a Device with an External Wire: Repeatibility of Reverberation Chamber Results and Correlation with Anechoic Chamber Results

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    We present the experimental radiated immunity results of an electronic device with an external wire obtained in reverberation and anechoic chambers. Repeatability and reproducibility of reverberation chamber measurements are investigated by repeating the test in three reverberation chambers with different characteristics. We show how the current state of the art allows a statistical control of RC measurement repeatability within an industrial installation, and that a statistical correlation with AC results frequency by frequency is possible in particular cases relevant to automotive application
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