1,721,214 research outputs found

    Premessa (coautori: A. Acconcia Longo, G. Cavallo, A. Guiglia)

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    Introduzione agli Atti del Convegno su un secolo di studi di bizantinistica alla Sapienza Università di Roma, svoltosi il 10 ottobre 2008

    G. Cavallo, Libri e lettori nel mondo bizantino

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    Federici Carlo. G. Cavallo, Libri e lettori nel mondo bizantino. In: Gazette du livre médiéval, n°2. Printemps 1983. pp. 23-24

    G. Cavallo et H. Maehler, Greek Bookhands of the Early Byzantine Period A.D. 300-800

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    Straus Jean A. G. Cavallo et H. Maehler, Greek Bookhands of the Early Byzantine Period A.D. 300-800. In: L'antiquité classique, Tome 59, 1990. pp. 466-467

    G. Cavallo, La scrittura greca e latina dei papiri. Una introduzione, Pisa-Roma 2008

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    Recensione dell'opera di G. Cavallo dedicata alla illustrazione generale della scrittura greca e latina documentata da papiri letterari e documentari ininterrottamente dal sec. IV a. C. all'VIII d.C

    G. Cavallo et H. Maehler, Greek Bookhands of the Early Byzantine Period A.D. 300-800

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    Straus Jean A. G. Cavallo et H. Maehler, Greek Bookhands of the Early Byzantine Period A.D. 300-800. In: L'antiquité classique, Tome 59, 1990. pp. 466-467

    Malte a base di calce idraulica naturale modificate con fibre corte di basalto per la conservazione del patrimonio culturale e per l’edilizia sostenibile

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    La ricerca è volta al miglioramento per aggiunta di fibre corte di basalto in diverse morfologie delle proprietà meccaniche e delle caratteristiche fisiche di malte idrauliche per applicazioni nell'ambito dei beni culturali e dell’architettura sostenibile. In letteratura è noto come l’inglobamento di fibre corte in malte e calcestruzzi sia efficace nella riduzione del ritiro plastico, nonché nel miglioramento di alcune delle loro proprietà quali tenacità, resistenza a flessione e durevolezza. Tra le fibre disponibili, quelle a base di basalto sono state scelte per gli ottimi risultati mostrati in altre applicazioni, la recente entrata nel mercato industriale e le caratteristiche ecologiche del materiale, considerato naturale poiché ottenuto da rocce di basalto. Le proprietà meccaniche di malte idrauliche a base di calce naturale addizionate con fibre lisce di basalto distribuite casualmente, sono valutate mediante l'utilizzo di prove di flessione a tre punti e test a compressione evidenziando le modifiche della tenacità. L'assorbimento d'acqua per capillarità ed i relativi coefficienti sono stati utilizzati come parametro per comprendere la porosità dei compositi. Le osservazioni morfologiche sono state eseguite tramite microscopio ottico e microscopio elettronico a scansione per spiegare l'interazione tra fibra e matrice, in particolare per osservare i fenomeni di propagazione della frattura. Sono stati studiati materiali compositi con fibre in diverso contenuto, sizing, lunghezza, diametro e morfologia.The research aims at the improvement of mechanical and physical characteristics of hydraulic mortars through the addition of different morphologies of short fibers to be applied in the fields of Cultural Heritage and sustainable architecture. It is well known that the incorporation of short fibers in mortar and concrete products can reduce plastic shrinkage, as well as improve some of their properties such as toughness, flexural strength and durability. Amongst the available fibers, basalt ones were chosen because of the excellent results shown in other applications, their quite recent entrance into the industrial market and their environmentally friendly character, since they are considered natural because obtained from basalt rocks. Mechanical properties of natural hydraulic lime-based mortars reinforced with randomly distributed smooth basalt fibers where evaluated through the use of compressive test and three-point bending test to determine flexural properties and modification of flexural toughness. Water absorption and capillary water absorption were an additional parameter used to understand the open porosity of the composites. Morphological observations were carried out by optical microscope and scanning electron microscope to explain the interaction between fibers and matrices, especially to observe fracture propagations. Different contents, sizings, lengths, diameters and types of fibers were studied

    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

    Variations on the Author

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    “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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