1,720,970 research outputs found
La metodologia della ricerca-azione nella progettazione a più voci dell’adattamento territoriale
No full textDai distretti urbani agli eco-distretti: metodologie progettuali e approcci interscalari
No full textL’obiettivo di prefigurare modelli di transizione per i distretti urbani in regime di cambiamento climatico si fonda sul tema del progetto di adattamento alla scala di distretto urbano individuata come appropriata dimensione scalare di riferimento per gli interventi di adattamento climatico. Fra i numerosi progetti di ricerca e azioni sperimentali in corso nel panorama scientifico nazionale, uno specifico accreditamento va attribuito al progetto di ricerca PRIN (Progetti di Ricerca di Rilevante Interesse Nazionale) 2015 - Adaptive design e innovazioni tecnologiche per la rigenerazione resiliente dei distretti urbani in regime di cambiamento climatico, che si confronta con due tesi principali. . La prima si basa sulla necessità di trasformare i distretti urbani in eco-distretti resilienti, mettendo a punto modelli esemplificativi di tale transizione da proporre alle pubbliche amministrazioni e alla società come percorso necessario per contrastare gli impatti climatici. Una seconda tesi fa riferimento alla distribuzione degli interventi, i quali solo se omogeneamente diffusi sul territorio possono garantire risultati apprezzabili in termini di adattamento agli impatti climatici. La ricerca PRIN 2015 è diventata in tal modo l’occasione in cui dispiegare le competenze delle discipline della conoscenza ambientale, socio-economica e del progetto, nel riferimento ad ampie sfere di competenza e nel ricorso al pensiero complesso. La metodologia basata sulla verifica ex-ante e post-intervento è orientata a verificare l’efficacia di scelte progettuali e di alcune categorie di opere piuttosto che di specifiche soluzioni tecnico-progettuali. A valle di tale livello meta-progettuale, è necessario attivare una fase di progettazione di dettaglio mettendo in circolo dati più puntuali che possano anche in parte modificare le previsioni meta-progettuali. La ricerca si è mossa, infine, nella definizione di vari progetti strategici fra i quali emerge quello per il distretto di Soccavo, in base all’individuazione di alcuni temi urbani e ambientali, da leggere necessariamente nella loro unità. Il patrimonio costruito dei distretti urbani, concepito in base ai modelli di consumo e crescita illimitata del Novecento, determina e subisce impatti non più accettabili e dovrà essere “adattato” ai nuovi scenari della transizione urbana climate proof
Synthesis by the citrate route and characterisation of BaZrO3, a high tech ceramic oxide: preliminary results
No full textIn this work a route for BaZrO3 synthesis that assures homogeneity and stoichiometry of the final powder is proposed. The route consists in the complexation of the metallic ions by citric acid and ammonia in an aqueous solution. After an accurate drying of the initial solution, the crystalline phase of barium zirconate is obtained at relatively low temperature (about 700oC) and in relative short times utilising cheap starting reagents. A detailed description of the different steps of a preparation of 300 g of final product and a comparison with BaZrO3 powders produced by a typical solid state reaction are reported. The powders are characterised during the various steps by thermal analysis (DTA-TGA) and by structural and morphological techniques (XRD, FTIR and granulometric measurements). A preliminary investigation of the sintering process is reported: SEM imaging and dilatometric measurements were performed to evaluate different sintering behaviours of the powders prepared by wet and solid state methods
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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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