1,721,052 research outputs found

    Tavola Rotonda "Internet in un chip”

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    Crescono sul mercato le soluzioni a costo contenuto per aggiungere ai dispositivi e ai sistemi embedded anche la connettività al We

    Joint Inversion of GPS and Strong Motion Data for Earthquake Rupture Models

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    Ricostruzione del processo di rottura cosismico su faglia finita attraverso l’inversione congiunta di dati sismologici e geodetici. Implementazione e validazione di una nuova tecnica di inversione non lineare, di tipo global search, per l’inversione congiunta di dati GPS e dati strong motion. Analisi statistica dell’ensemble dei modelli di rottura esplorati dall’algoritmo di inversione. Analisi sulla consistenza dinamica dei modelli cinematici di rottura. Applicazioni: (1) Test Sintetici atti a validare la capacità di risoluzione e robustezza della tecnica sviluppata; (2) Analisi del terremoto di Tottori (2000); (3) Analisi del terremoto di Niigata (2007); (4) Determinazione di scenari di scuotimento in aree di interesse prioritario e strategico (terremoto dell’Irpinia, 1980).Istituto Nazionale di Geofisica e VulcanologiaUnpublished3.1. Fisica dei terremotiope

    Rupture process of the 2007 Niigata-ken Chuetsu-oki earthquake by non-linear joint inversion of strong motion and GPS data

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    We image the rupture history of the 2007 Niigata-ken Chuestu-oki (Japan) earthquake by a nonlinear joint inversion of strong motion and GPS data, retrieving peak slip velocity, rupture time, rise time and slip direction. The inferred rupture model contains two asperities; a small patch near the nucleation and a larger one located 10 15 km to the south-west. The maximum slip ranges between 2.0 and 2.5 m and the total seismic moment is 1.6 1019 Nm. The inferred rupture history is characterized by rupture acceleration and directivity effects, which are stable features of the inverted models. These features as well as the source-to-receiver geometry are discussed to interpret the high peak ground motions observed (PGA is 1200 gals) at the Kashiwazaki-Kariwa nuclear power plant (KKNPP), situated on the hanging-wall of the causative fault. Despite the evident source effects, predicted PGV underestimates the observed values at KKNPP by nearly a factor of 10

    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
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