1,720,974 research outputs found
PREVISIONE DELLE CONDIZIONI DI INSTABILITÀ TERMOACUSTICA IN CAMERE DI COMBUSTIONE EQUIPAGGIATE CON SISTEMI PASSIVI DI SMORZAMENTO
No full text“Metodologie di Analisi Sperimentale Per Sistemi Passivi Di Smorzamento Delle Oscillazioni Di Pressione Dovute Ad Instabilità Della Combustione”
No full textAPPROCCIO NUMERICO-SPERIMENTALE ALLO STUDIO DEL COMPORTAMENTO ACUSTICO DEI COMBUSTORI ANULARI PER TURBINE A GAS
No full textAnalisi della risposta sismica di una struttura prefabbricata a seguito del sisma dell'Emilia Romagna del 2012
No full textIl terremoto che ha colpito l’Emilia Romagna nel maggio 2012 ha evidenziato l’elevata
vulnerabilità degli edifici prefabbricati esistenti. Il presente studio riguarda la valutazione
della risposta sismica di un edificio industriale monopiano in c.a. severamente danneggiato
dal sisma.
La struttura analizzata è situata a Mirandola (MO); essa si compone di una struttura principale
monopiano a pianta rettangolare ed un’appendice ad “L” con impalcato intermedio. Il
sisma ha provocato il collasso di una porzione del fabbricato che ha coinvolto parte della
copertura e le relative travi di sostegno, causato dalla rottura di due pilastri centrali.
È stato definito un modello tridimensionale della struttura in OpenSees, sulla base del progetto
esecutivo della stessa. Si è adottata una modellazione a plasticità concentrata. Data la
natura delle connessioni trave-pilastro, gli elementi orizzontali sono stati modellati come
travi incernierate alle estremità.
Al fine di giustificare i danni subiti dalla struttura a causa del sisma, sono state condotte
analisi dinamiche non lineari utilizzando come input sismico l’accelerogramma registrato a
Mirandola (MO) durante il secondo mainshock dell’evento sismico emiliano del 2012. I
risultati delle analisi numeriche hanno evidenziato la crisi a taglio dei due pilastri collassati,
su cui ha influito in modo determinante la presenza del carroponte
The systems PbO-Al2O3-SiO2 (PAS) and MgO-Al2O3-SiO2 extended to PbO and Cr2O3 (PMASCr) at 1 Atm : investigations on phase relations and possible applications to the material sciences
No full textCr-Pb-bearing industrial waste: experimental investigations for inertization in ceramic matrix.
No full text
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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