1,721,014 research outputs found
Sistema di dispersione di micro o nanoparticelle solide in una fase liquida
No full textScopo della presente invenzione è quello di fornire un dispositivo di dispersione di micro o nanoparticelle solide in una fase liquida atto a risolvere i suddetti problemi.
E’ oggetto della presente invenzione un dispositivo di dispersione di micro o nanoparticelle solide in una fase liquida che, conformemente alla rivendicazione 1, comprende:
- una prima parte atta alla generazione di almeno uno spray di una fase liquida elettricamente carico;
- una seconda parte atta alla generazione di un aerosol di micro o nanoparticelle;
essendo le due parti realizzate in modo da consentire il contatto e l’interazione fra lo spray e l’aerosol, per cui microgocce definenti lo spray inglobano le nanoparticelle.
Un ulteriore scopo dell’invenzione è quello di fornire un metodo di dispersione di micro o nanoparticelle solide in una fase liquida atto a risolvere i suddetti problemi.
E’ pure oggetto della presente invenzione un metodo di dispersione di micro o nanoparticelle solide in una fase liquida, conformemente alla rivendicazione 8.
Risulta, dunque, scopo della presente invenzione proporre una miscela caricata con micro o nano particelle solide uniformemente disperse.
Dunque, è pure oggetto della presente invenzione una miscela caricata con micro o nano particelle solide uniformemente disperse.
Vantaggiosamente, il sistema di produzione garantisce un ottimo livello di dispersione delle polveri conferendo allo strato di vernice depositato su un substrato eccezionale uniformità delle caratteristiche tecnologiche, meccaniche e chimiche.
Il sistema opera consentendo la cattura delle nanopolveri, opportunamente disperse in una corrente gassosa, da parte di microgocce e/o sottili strati liquidi di vernice sulle quali è stata indotta, con opportuni sistemi, una adeguata carica elettrostatica. Il processo di attrazione fra le microgocce e le singole particelle di nanopolveri è possibile per effetto della presenza sulle nanopolveri di una naturale carica elettrostatica inversamente proporzionale alle dimensioni delle nanopolveri.
Lo spray di vernice nanocaricata può essere convogliato direttamente all’unità di deposizione o secondo le necessità verso unità di imbottigliamento e/o confezionamento.
Vantaggiosamente, il sistema proposto può essere applicato per operare con vernici liquide di differenti caratteristiche chimiche e fisiche quali viscosità, densità, concentrazione di solventi e con polveri di differenti composizione chimica, dimensioni, distribuzione granulometrica, morfologia e sfericità
Thermal and mechanical behaviours of pre-coated sands for selective laser sintering
No full textThe thermal and mechanical behaviour of three types of pre-coated sands for selective laser sintering was characterised. First, the possibility of predicting the temperature evolution in the material with time under assigned heating conditions was verified. Then, a model aiming to calculate the degree of cure of the resin for a fixed heating history was assessed. Finally, hardness tests were performed on the sands, in order to measure their mechanical properties as a function of the thermal history. A strict correlation was found between the hardness data and the predicted degree of cure of the resin
Analisi sperimentale e numerica dei fenomeni termici e fluidodinamici su sistemi di scarico di autovetture
No full textAnalisi termica bidimensionale dell’influenza degli schermi radiativi sullo scarico di un autoveicolo
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
Thermal and mechanical behaviours of pre-coated sands for selective laser sintering
No full textThe thermal and mechanical behaviour of three types of pre-coated sands for selective laser sintering was characterised. First, the possibility of predicting the temperature evolution in the material with time under assigned heating conditions was verified. Then, a model aiming to calculate the degree of cure of the resin for a fixed heating history was assessed. Finally, hardness tests were performed on the sands, in order to measure their mechanical properties as a function of the thermal history. A strict correlation was found between the hardness data and the predicted degree of cure of the resin
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
- …
