1,720,993 research outputs found
Un’allegoria di Alessandro Turchi e un bozzetto di Giovan Battista Lenardi/ An allegory by Alessandro Turchi and a sketch by Giovan Battista Lenardi
Full text linkIn questo contributo si pubblicano due dipinti del secolo XVIII conservati nella Pinacoteca civica di Ripatransone, nelle Marche, appartenenti al nucleo di opere donata dal magistrato e scultore Uno Gera. Il primo è un’Allegoria della Filosofia che in questa sede viene attribuita al pittore veronese Alessandro Turchi detto l’Orbetto sulla base di puntuali confronti stilistici. L’opera rappresenta un’aggiunta al catalogo dell’artista e conferma la predilezione del Turchi per i soggetti colti, destinati ad una committenza raffinata. L’analisi formale e iconografica, dalla quale si evincono le fonti letterarie dell’artista (Boezio e Cesare Ripa), suggerisce di accostare il dipinto ad un’Allegoria della Retorica di ambito gentileschiano, ora nella collezione Robilant-Voena. La seconda opera esaminata è un’Assunzione della Vergine con San Nicola che viene restituita a Giovan Battista Lenardi, pittore del tardo Seicento attivo nella cerchia dei seguaci di Pietro da Cortona. La tela è riconosciuta come bozzetto per una pala d’altare destinata alla chiesa di San Giuseppe dei Falegnami a Roma e oggi approdato al Los Angeles County Museum of Art. In this contribution there are published two paintings of the XVIII century, exhibited in the Pinacoteca Civica of Ripatransone, in the Marche, belonging to the collection donated by the magistrate and sculptor Uno Gera. The first one is an Allegory of Philosophy, attributed to Alessandro Turchi, known as Orbetto, on the basis of stylistic comparisons. The painting represents an addition to the artist’s catalogue and confirms Turchi’s predilection for scholarly subjects, destined for refined customers. The analysis of style and iconography, from which we deduce the literary sources of the artist (Boezio and Cesare Ripa), suggests how to compares the painting with an Allegory of Rhetoric within the Gentileschi area, nowadays part of the Robilant-Voena collection. The painting may have been part of a small series ofworks united by subject (perhaps depicting the Seven Liberal Arts ruled by Philosophy) and perhaps made by different artists, in accordance with the practice of the time. The second artwork examined is an Assumption of the Virgin with Saint Nicholas which is attribuited to Giovan Battista Lenardi, a late seventeenth century painter active in the circle of followers of Pietro da Cortona. The canvas is recognized as a sketch for an altarpiece destined for the church of San Giuseppe dei Falegnami in Rome and today exhibited at the Los Angeles County Museum of Art
Alessandro Turchi, il Battesimo; Alessandro Turchi, La Vergine appare a Sant'Alessio; Alessandro Turchi, La Madonna e il Bambino; Antony van Dyck, Ritratto di Virginio Cesarini; Antony van Dyck, Ritratto dell'Abate Alessandro Scaglia; Gabriel Naudè, Lettera a Cassiano dal Pozzo; Virginio Cesarini, Lettera a Cassiano dal Pozzo; Biancamaria Bricherasio, Lettera a Cassiano dal Pozzo; Filippo Napoletano, Adorazione dei Magi; Pietro Fachetti, Ritratto di Federico Cesi, Anonimo tedesco, Ritratto di Ferrante Imperato; Pier Andrea Bufalini, Ritratto di Francesco Bracciolini; Ferrante Imperato, Dell'historia naturale; Francesco Fracanzano, Testa di Santo; Esprit Granjéan, Ritratto di Emanuele Tesauro
No full textla mostra, tenutasi a Roma nel 2000 e poi, con sostanziali variazioni, a Biella nel 2001, ricostruisce la collezione artistica, antiquaria ed erudita di Cassiano dal Pozzo. Le schede analizzano dipinti di Alessandro Turchi, Antony van Dyck ed altri appartentui al celebre consigliere artistico ed agente della famiglia Barberini, protettore di Nicolas Poussin, Simon Vouet e Artemisia Gentileschi
Chemical Erosion of Carbon-Phenolic Rocket Nozzles with Finite-Rate Surface Chemistry
No full textAblative materials are commonly used to protect the nozzle metallic housing and to provide the internal contour to expand the exhaust gases in solid rocket motors. Because of the extremely harsh environment in which these materials operate, they are eroded during motor firing with a resulting nominal performance reduction. The objective of the present work is to study the thermochemical erosion behavior of carbon-phenolic material in solid rocket motor nozzles. The adopted approach relies on a validated full Navier-Stokes flow solver coupled with a thermochemical ablation model, which takes into account finite-rate heterogeneous chemical reactions at the nozzle surface, rate of diffusion of the species through the boundary layer, pyrolysis gas and char-oxidation product species injection in the boundary layer, heat conduction inside the nozzle material, and variable multispecies thermophysical properties. The results obtained with the proposed approach are compared with two sets of experimental data: subscale motor tests carried out for the space shuttle reusable solid rocket motor and the static firing tests of the second and third stage solid rocket motors of the European Vega launcher, which use carbon-carbon for the throat insert and carbonphenolic for the region downstream of the throat
Manuale del processo tributario
No full textQuinta edizione del Manuale del processo tributario scritto dal prof. Tesauro, aggiornata da Alessandro Turchi dopo la scomparsa dell'Autore avvenuta nel 2019
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
Ablative material behavior in oxygen/methane thruster environment
No full textAblative materials represent a low cost and reliable means to insulate rocket engine components from high-temperature, corrosive combustion product environments. Besides their diffuse application in solid rocket nozzles, their use also emerges as a valid alternative in liquid rocket engines. Together with the growing interest in oxygen/methane liquid rocket engines, these materials have gained attention as possible insulator for small upperstage engines or in-space thrusters. In this framework, a validated approach for the study of carbon-based pyrolyzing and non-pyrolyzing materials, together with a novel boundary condition developed to analyze the silica-based material behavior, has been used to numerically reproduce the material response in the highly oxidizing environment generated by the combustion of oxygen and methane. At first, the validation against experimental data of the silica-based material erosion model is presented. Subsequently, the behavior and the response of different ablators in a oxygen/methane environment is numerically investigated for a wide range of operating conditions. Commonly made assumptions in the simulation of the material response are thoroughly analyzed and a critical overview of the results is presented. © 2012 by Alessandro Turchi, Daniele Bianchi, Francesco Nasuti, Renato Marocco
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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