1,721,054 research outputs found

    Reti confraternali per immigrati e forestieri nell’Italia della prima Età moderna

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    Quadro generale dei fenomeni associativi di matrice o con risvolti religiosi, connessi ai nuclei 'nazionali' di immigrati e forestieri nel mondo urbano dell'Italia della prima età modern

    Comparative Study among Analytical and Nomerical Models for the Performance Evaluation of Optical Systems Affected by Polarization Mode Dispersion

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    In the present work the analytical models are applied to calculate the system performance for different fibre polarisation mode dispersion (PMD) conditions and for varying system parameters and the results obtained with them are compared to those obtained using the discrete random waveplate numerical model (DRW) model, assumed as a faithful description of the real fiber with all order PMD effects. Through this comparative analysis, never done before in literature to the authors knowledge, the accuracy of the analytical models in the approximation of high-order PMD effects is studied, and, among them, a precise analytical tool for the system impairments evaluation is found

    Romani e forestieri nelle case di San Pietro in Vaticano nel secondo quattrocento

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    Si presentano alcune riflessioni riguardo all'incidenza che i modi e i luoghi dell'abitare esercitarono sulla vita di romani e forestieri nell'Urbe nella seconda metà del XV secolo. Fonti contabili dell'archivio del Capitolo di San Pietro permettono di mostrare il caso di alcuni affittuari di case appartenute alla basilica vaticana, di varia condizione ed origine, che seppero approfittare del rapporto così instaurato con i canonici vaticani per costruire carriere professionali o ecclesiastich

    Exact Evaluation of the Jones Matrix of a Fiber in the Presence of Polarization Mode Dispersion of Any Order

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    This paper describes how to evaluate exactly in arecursive manner the Jones transfer matrix of a fiber for anyorder of polarization mode dispersion (PMD) and derives for ita second-order accurate analytical approximation. The secondorderapproximation is then compared against the exact result aswell as with other models found in the literature

    Immigrati e forestieri nell'Italia della lunga Età moderna. Introduzione

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    Introduzione al volume curato dallo stesso autore, in cui si ripercorrono in sintesi quadri e dinamiche generali e casi di studio, tra acquisizioni storiche e interpretazioni storiografiche, sul tema dell'immigrazione e del controllo dei forestieri nelle città italiane tra fine Medioevo e primo Ottocento

    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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