89 research outputs found
L'artista "moderno" e il ruolo delle Accademie; Il rapporto dell'arte con il mondo delle lettere; Le corti e la promozione delle arti: Roma
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Mecenatismo pontificio, cantieri di restauro e decorazione pittorica nella Roma sacra di Pio 9. (1846-1870)
No full textDottorato di ricerca in storia e conservazione dell'oggetto d'arte e dell' architettura. 10. Ciclo. Tutore S. Susinno. Coordinatore V. CasaleConsiglio Nazionale delle Ricerche - Biblioteca Centrale - P.le Aldo Moro, 7, Rome; Biblioteca Nazionale Centrale - P.za Cavalleggeri, 1, Florence / CNR - Consiglio Nazionale delle RichercheSIGLEITItal
Filippo Juvarra, «pittore, architetto e cesellatore» di chiese
No full text«Pittore, architetto e cesellatore». Le qualifiche che lo storico siciliano Francesco Susinno attribuisce a Filippo Juvarra nel 1724, quando è ormai professionista di grande notorietà, sembrano bene sintetizzare le idee, le suggestioni e i progetti ora restituiti dagli album, chiusi da eleganti legature in pelle, conservati nel ricco patrimonio della Biblioteca Nazionale Universitaria di Torino. Raffinati disegni, a china talvolta acquerellata, restituiscono la grande abilità di un uomo che, ordi- nato sacerdote nel 1703, nei fogli di chiese, cappelle e altari media la sua condizione di ecclesiastico con la cultura artistica e architettonica in cui si forma e vive. Nelle sue architetture sacre, talvolta pensate a più mani con i collaboratori, si dimostra capace di cesellare, nel significato di rifinire con molta cura, le grandi soluzioni progettuali come i piccoli dettagli delle macchine d’altare o delle decorazioni. Le tavole, che poco documentano gli incarichi ricevuti dalla corte sabauda, rendono, invece, la lunga attività di studio, e certamente anche didattica, che Juvarra intraprende a Roma e prosegue nella capitale piemontese. I temi affrontati, il metodo, l’impaginazione degli elaborati, ammettono l’alternarsi degli autori, il maestro e gli allievi, seppure non sempre puntualmente identificabili, forse anche nello stesso documento. Emerge, oltre alla nota capacità inventiva e all’attitudine grafica juvarriana, una ricercata verifica dell’immagine della chiesa a cantiere ultimato, non sempre compiuta come nelle soluzioni prospettate dalla collezione. Spicca, pure, il confronto aperto tra le scelte per i nuovi progetti e i modelli, dalla visione michelangiolesca alla tradizione seicentesca romana, fino al costruito piemontese approfondito non solo per rispondere a precise commesse. È il concatenarsi di pensieri che approdano alle vedute prospettiche, anche solo abbozzate, in cui le chiese superano la natura di fabbriche concluse, raffigurate per essere viste in un paesaggio diventando, attraverso un controllo della composizione proprio della pittura, veicoli di trasmissione di messaggi non solo legati alle discipline dell’architettura.
«Painter, architect and engraver». The qualifications that the Sicilian historian Francesco Susinno attributes to Filippo Juvarra in 1724, when the architect is a very reputed professional, may perfectly underline the ideas, suggestions and projects returned by the albums, in their elegant leather bindings, part of the rich heritage of Turin National University Library. Refined drawings, sometimes illuminated by watercolor, reflect the great skill of a man who, ordained priest in 1703, mediates, in his sketches for churches, chapels and altars, his ecclesiastical condition with the artistic and architectural culture in which he has been formed and uses to live. In his sacred architectures, sometimes conceived in cooperation with his collaborators, he proves his familiarity with chiseling, in the sense of finishing with enormous care, both the great design solutions and the small details of the altar machines or decorations. The tables, which rarely document the assignments received from the Savoy court, on the contrary certifies the long study activity, with also didactic practice, undertaken by Juvarra in Rome and prosecuted in Piedmont capital. The topics, the method, the layout of the works, allow the alternation of authors, both the teacher and the students, although not always identifiable, perhaps even in the same document. In addition to the well-known inventiveness and graphic attitude of Juvarra, a refined verification of the image of the church after the construction emerges, in close relationship with the specificity of the site contest, so that the yard is not always accomplished as in the solutions proposed by the collection. The open confrontation between the choices for new projects and the models also stands out, from Michelangelo’s vision to the 17th century Roman tradition, up to the Piedmontese architecture, analyzed and deepened not only to respond to specific orders. It is the concatenation of thoughts that reach perspective views, even if only sketched, in which the churches overcome the nature of finished buildings, depicted to be seen in a landscape, becoming – through a control of the composition proper to painting – vehicles for the transmission of messages not only related Architecture disciplines
Inclusive J, ψ′ and χ<sub>c</sub> production in hadronic Z decays
No full textWe report on measurements of the inclusive production of J, Ψ′ and χc mesons in hadronic Z decays, based on 3.2 million hadronic events collected using the L3 detector at LEP. The J and Ψ′ mesons are reconstructed through their decays into lepton pairs, while the χc mesons are reconstructed via the decay mode χc → J + γ. The measured branching fractions are: Br(Z → J + X) = (3.40 ± 0.23 (stat.) ± 0.27 (sys.)) × 10⁻³, Br(Z → Ψ′ + X) = (1.6 ± 0.5 (stat.) ± 0.3 (sys.)) × 10⁻³, Br(Z → χc1 + X) = (2.7 ± 0.6 (stat.) ± 0.5 (sys.)) × 10⁻³. In the absence of a clear χc2 signal, the upper limit at 90% C.L. is set: Br(Z → χc2 + X) < 3.2 × 10⁻³
Čerenkov light contribution in lead tungstate crystals
No full textResults of detailed measurements of the Čerenkov light yield from lead tungstate (PbWO4) crystals are presented. A single crystal as well as a small homogeneous calorimeter (ECAL), consisting of 19 PbWO4 crystals, were exposed to electrons, muons and pions at the H4 beam line at CERN. It turns out that a significant fraction of the detected light is not the result of scintillation processes, but rather of the Čerenkov mechanism. This can be assessed from the analysis of both the angular dependence of the signals and their time structure. Detailed studies of the ECAL signals, corroborated by the measurements taken with the Dual-Readout calorimeter (DREAM), backing up the ECAL during beam tests, show that it is possible to estimate the independent contributions of scintillation and Čerenkov light. This information makes it possible to account for one of the dominant sources of fluctuations in hadronic showers and thus to achieve a significant improvement in hadronic calorimetry performance
Study of the weak charged hadronic current in b decays
No full textCharged and neutral particle multiplicities of jets associated with identified semileptonic and hadronic b decays are studied. The observed differences between these jets are used to determine the inclusive properties of the weak charged hadronic current. The average charged particle multiplicity of the weak charged hadronic current in b decays is measured for the first time to be 2.69±0.07(stat.)±0.14(syst.). This result is in good agreement with the JETSET hadronization model of the weak charged hadronic current if 40±17% of the produced mesons are light-flavored tensor (L=1) mesons. This level of tensor meson production is consistent with the measurement of the π⁰ multiplicity in the weak charged hadronic current in b decays
Effects of the temperature dependence of the signals from lead tungstate crystals
No full textThe signals from lead tungstate crystals are studied as a function of temperature. Over the range from 13 to 45 degrees C, the total light output decreases by about a factor of two. This effect only concerns the scintillation component, so that the relative contribution of Cherenkov light to the signals increases with the same factor. The decay time of the scintillation component is observed to decrease as well. (C) 2008 Elsevier B.V. All rights reserved
Evidence for double-jet structure in pp interactions at = 62 GeV
No full textPlanar and nonplanar events are studied experimentally and compared with Monte Carlo simulated events. The two-jet structure in pp interactions is shown to be analogous to the three-jet structure in e /sup +/e/sup -/ interactions. (9 refs)
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