1,721,068 research outputs found
Fondamenti di meccanica dei solidi, con applicazioni ed esercizi
No full textIl testo presenta i fondamenti della meccanica dei solidi, riassumendone gli aspetti teorici ed applicandone le
relazioni principali in un compendio di esercizi sia svolti che proposti, ordinati secondo complessità crescente.
Si applica il calcolo vettoriale alla statica dei corpi rigidi, e si analizzano le azioni canoniche da sforzo normale, flessione, torsione e taglio in semplici strutture trabeiformi. Si studia la geometria delle sezioni di travi, adottando sia la notazione classica dei prontuari commerciali, che la notazione tensoriale, utile per unificare convenzioni e tecniche di calcolo. Si definiscono gli stati tensionali e deformativi, la relazione costitutiva che li lega, si sviluppa il calcolo delle sollecitazioni e della deformata, affrontando entrambi i problemi ingegneristici del calcolo strutturale e del dimensionamento. Si conclude, in appendice, elencando alcune proprietà meccaniche dei materiali di interesse costruttivo e la geometria dei profilati commerciali più comuni
Raccolta di temi d'esami svolti, passati e futuri di elementi delle macchine per ingegneria meccanica
No full textRaccolta di temi ed esercizi d'esame svolti e risolti per il corso di elementi delle macchine di ingegneria meccanica
Raccolta di temi d'esame svolti, passati e futuri di costruzione di macchine per ingegneria chimica.
No full textRaccolta di esercizi e temi d'esame svolti e risolti di costruzione di macchine per ingegneria chimica
Esercizi di meccanica delle strutture. Vol 2: applicazioni
No full textEsercizi avanzati di meccanica delle strutture, tratti da applicazioni inerenti il settore dell'ingegneria industriale
An experimental study on the shear strength of steel structures joints
No full textThe results of an experimental investigation on the shear strength of structural joints are presented and discussed. Joint typologies generally employed in structural frames of industrial warehouses and intermediate floors are taken into consideration. Specimens were supplied by an industrial shelving manufacturer, in two different configurations: the first one characterized by steel pressed geometrical connectors and the second one consisting in bolted fittings to angular welded supporting plates. A specific testing device has been designed in order to transfer axial loading into shear loading applied to a couple of joints in a symmetrical testing configuration. Quasi-static loads were applied with increasingly intensity steps, until the yielding of the material or the overall structure collapse were reached. Failure modes of the tested joints are analyzed and discussed
Esercizi di meccanica delle strutture. Vol I: esercizi di base
No full textVasta raccolta di esercizi di base di meccanica delle strutture per il settore dell'ingegneria industriale. Prima di ogni sezione o tema è presente una trattazione sintetica degli aspetti teorici inerenti
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
- …
