1,721,034 research outputs found
Histoire et methode d'une recherche sur Claude Vignon.
Full text linkFil: Pacht Bassani, P. Universidad de Buenos Aires, Facultad de Filosofía y Letras, Instituto de Historia de las Artes "Julio E. Payró"; Argentina
I caravaggeschi francesi a Roma
Full text linkFil: Pacht Bassani, P. Universidad de Buenos Aires, Facultad de Filosofía y Letras, Instituto de Historia de las Artes "Julio E. Payró"; Argentina
I caravaggeschi francesi a Roma
Full text linkFil: Pacht Bassani, P. Universidad de Buenos Aires, Facultad de Filosofía y Letras, Instituto de Historia de las Artes "Julio E. Payró"; Argentina
La sicurezza del cantiere e la pianificazione della manutenzione: il caso del Castello Visconteo di Fagnano Olona (VA)
No full text1th International Symposium "The design, the safety, the structure, the management of resurces and innovative process in the construction industry
Approccio multiscala nell'analisi microstrutturale di leghe di alluminio: dal componente fino agli atomi per comprendere il comportamento di muove leghe = Multi-scale approach in the microstructural analysis of aluminium alloys: from component to atoms to understand the behavior of new alloys
No full textTra le leghe leggere, senza dubbio le più utilizzate sono le leghe di alluminio: un’ampia gamma di composizioni, a partire da leghe per fonderia fino a quelle da deformazione plastica, e da trattamento termico, è a disposizione del progettista, per adattarsi alle varie applicazioni. Nonostante ciò, vi è una continua ricerca di nuove leghe per incrementare ulteriormente la resistenza meccanica ed il campo delle temperature di esercizio, oltre che per soddisfare le esigenze di nuove tecniche di produzione. In parallelo, è necessario conoscere e comprendere al meglio gli effetti microstrutturali, anche secondari, sulle proprietà dei materiali: un adeguato approccio multi-scala è consigliabile per interpretare al meglio le correlazioni tra microstruttura e proprietà di queste nuove o rivisitate leghe. Un esempio di questo approccio applicato ad una lega di alluminio da deformazione plastica e trattamento termico, destinata ad applicazioni ad alta temperatura, è descritto in questa memoria, unitamente ai problemi e soluzioni adottate. Vari aspetti della microstruttura della lega sono stati analizzati per comprenderne al meglio l’evoluzione durante la permanenza alle temperature di esercizio. La microscopia ottica ha fornito le informazioni relative all’aspetto generale della microstruttura e relative macro-caratteristiche. La microscopia elettronica è stata invece utilizzata per analizzare la dimensione dei grani, tessitura e natura delle fasi secondarie di maggiori dimensioni. I risultati di queste prime analisi sono stati utilizzati per la validazione di modelli di comportamento meccanico basati appunto su tessitura e dimensione del grano. Infine per la comprensione del decadimento delle proprietà meccaniche a seguito di prolungato overaging, analisi TEM ad alta risoluzione (HR-TEM) si sono rese necessarie, per poter osservare ed analizzare l’evoluzione delle particelle rafforzanti di dimensioni minori
Phase transformation in duplex stainless steels after isothermal, treatments, continuous cooling and cold working
No full textThis paper concerns the phase transformation induced by heat treatment and cold rolling in four duplex stainless steel. In 2205 and 2507 , during the isothermal heat treatments, chi-phase precipitates as small particles at the ferrite/austenite boundaries, followed by sigma precipitation. At the lowest temperature the formation kinetic of chi-phase is favoured, with the increasing of time and temperature a progressive transformation of chi to sigma occurs and the kinetic of sigma is favoured. During continuous cooling, the chi -phase appears at low cooling rates. In low Ni grades the grain boundaries precipitation of chromium nitrides were detected , but no sigma and chi. In 2101 the austenite transforms to martensite both after cold rolling and quenchin
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
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