1,720,962 research outputs found
Resine e no. L’introduzione delle resine acriliche nel restauro italiano
No full textDagli anni Quaranta del Novecento furono sperimentati in Italia numerosi prodotti di sintesi nel tentativo di risolvere le problematiche conservative delle pitture murali. Grazie all’indispensabile contributo della ricerca internazionale le resine viniliche e acriliche furono introdotte e applicate in molteplici fasi di intervento, segnando il passaggio da una concezione del restauro di tradizione ottocentesca a una nuova metodologia di approccio, supportata dall’ausilio della sperimentazione scientifica. La diffusione di questi nuovi materiali si deve alle ricerche condotte presso l’Istituto Centrale del Restauro di Roma, diretto da Cesare Brandi, e al fondamentale contributo di alcuni restauratori, in particolare di Leonetto Tintori, uno tra i primi operatori a testare questi ritrovati negli interventi al Camposanto di Pisa, sugli affreschi di Giotto a Padova e Firenze, e in numerosi altri restauri. Negli anni Sessanta a queste esperienze si affiancarono le indagini di Paolo Mora, Paul Philippot e Giorgio Torraca, che contribuirono ad approfondire la conoscenza sulle sostanze sintetiche e a diffonderne l’utilizzo. Il testo è stato infine arricchito con le testimonianze di numerosi restauratori italiani, di storici dell’arte e di alcuni degli scienziati che presero parte in prima persona a quelle esperienze
La Carta Del Restauro del Contemporaneo. Uno strumento utile?
Full text linkThere is an urgent need for renovation in the field of contemporary art restoration that cannot be provided by the 1972 and 1987 Restoration Charters. What is required, however, is not a new Charter, which would risk becoming obsolete within a few years, but a series of commonly shared guidelines to help manage the heterogeneity of contemporary artwork. Compared to previous centuries, in fact, modern artists have been able to experiment with new chemical products and materials that can deteriorate quickly. This gives rise to several questions, one of which is: can traditional restoration principles still be considered valid? The answer is, yes, in part. For example, some concepts of preventive maintenance, retractability, and minor intervention still seem relevant. Another important issue is the possibility of rebuilding the creative process underlying these new works of art to identify any common aspects. Interviewing the artist and examining any existing archival sources about an artwork’s exhibition and ownership history, would be very helpful. Concerning restorations, it would be inadvisable to have artists carry them out themselves, because this would restart the creative process, resulting in entirely new works of art. This paper will highlight these and other issues and provide some useful suggestions to help guide us through this new artistic landscape in an attempt to preserve the different types of cultural heritage for future generations
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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