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Calcium oxalate films on stone surface: experimental assessment of the chemical formation
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La tavolozza di Francesco Hayez. Storia, conversazioni e scienza
No full textLa lunga ed emozionante carriera di Francesco Hayez, indiscusso caposcuola della pittura romantica in Italia, si è svolta in parallelo alle innovazioni dell’industria chimica dell’Ottocento e a contatto con gli ambienti artistici più avanzati dell’epoca.
Questo volume raccoglie i risultati della campagna di indagini - riflettografie e analisi spettroscopiche nell’infrarosso - svolta dal Dipartimento di Scienza e Alta Tecnologia dell’Università degli Studi dell’Insubria su ben sedici dipinti, realizzati tra il 1823 e il 1878. La ricerca ha permesso di aggiungere un importante tassello nella comprensione della tecnica prodigiosa dell’artista, fedele alle tradizionali pratiche di bottega ma sensibile verso la diffusione dei nuovi pigmenti di sintesi, resi disponibili dai progressi della chimica. È la prima occasione di uno studio sistematico con analisi non invasive e sperimentali su un corpus così ampio delle opere di Hayez: i dati raccolti permettono di ripercorrerne le scelte tecniche - disegno preparatorio, pigmenti, leganti - in un esteso arco temporale e attraverso diversi generi pittorici che spaziano dalla ritrattistica, alla pittura di storia, fino ai temi sacri
Prehistoric wall paintings: the case of the Domus de Janas necropolis (Sardinia, Italy)
No full textThe Domus de Janas (Home of the Fairies, or Home of the Witches) are Neolithic hypogea
located throughout Sardinia (Italy) and decorated with red and black wall paintings. The objective of this study was to define the painting technique through the analytical
characterization of the pigments and binding media. Samples of painting film from different graves have been examined by means of various analytical techniques. XRD, Raman and SEM–EDX analyses identified the red and black pigments respectively as red ochre rich
in hematite and carbon black, while GC–MS analyses characterized the organic binder as egg
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
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