97 research outputs found

    The Model of Reading : Modelling principles, Definitions, Schema, Alignments

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    READ-IT Model of Reading -V2Executive Summary This technical report introduces the data model developed to address the systematic collection and use of reading experiences in READ-IT project. The model of reading presented in this document is meant to inform the development of the READ-IT database and tools. This document describes the methodological approach and design principles adopted in the development of the model of reading. Furthermore, this technical report describes the content of the first version of the data model of the reading experience, including a preliminary analysis of the alignments between READ-IT model of reading with CIDOC-CRM, FRBRoo, FoaF and Schema.org

    Modelling Changes in Diaries, Correspondence and Authors’ Libraries to support research on reading: the READ-IT approach

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    Diaries, correspondence and authors’ libraries provide important evidence into the evolution of ideas and society. Studying these phenomena is connected to understanding changes of perspective and values. In this paper we present the approach adopted by the READ-IT project in modelling changes in the contents of diaries, correspondence and authors’ libraries related to reading. By considering these three types of sources, we discuss the use of the data model to permit the study and increase the usability of sources containing evidence of reading experiences, highlighting common challenges and patterns related to changes to readers and to the medium of reading when confronting historical events

    A non Overlapping Domain Decomposition Method for the Exterior Helmholtz Problem

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    In this paper, we first show that the domain decomposition methods that are usually efficient for solving elliptic problems typically fail when applied to acoustics problems.Next, we present an alternative domain decomposition algorithm that is better suited for the exterior Helmholtz problem. We describe it in a formalism that can use either one or two Lagrange multiplier fields for solving the corresponding interface problem by a Krylov method. In order to improve convergence and ensure scalability with respect the number of subdomains, we propose two complementary preconditioning techniques. The first preconditioner is based on a spectral analysis of the resulting interface operator and targets the high frequency components of the error. The second preconditioner is based on a coarsening technique, employs plane waves, and addresses the low frequency components of the error. Finally, we show numerically that, using both preconditioners, the convergence rate of the proposed domain decomposition method is quasi independent of the number of elements in the mesh, the number of subdomains, and depends only weakly on the wavenumber, which makes this method uniquely suitable for solving large-scale high frequency exterior acoustics problems
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