1,721,570 research outputs found
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
Tra immagine e immaginazione: analisi e interpretazione dello spazio u-topico. La serie delle Carceri piranesiane
No full textLa ricerca riguarda l’analisi e l’interpretazione di spazi rappresentati in opere grafiche a tema architettonico generati senza un’applicazione rigorosa delle regole prospettiche e dei canoni architettonici. In questi casi la restituzione prospettica, da sola, non è percorribile come strumento di analisi e interpretazione tridimensionale degli spazi. Le ipotesi ricostruttive risultano complesse e vanno perseguite attraverso altre strade.
Il metodo proposto ha trovato altri percorsi a disposizione, sia utilizzando gli strumenti propri della scienza della rappresentazione sia coinvolgendo altre discipline laddove questa non è riuscita a dare risposte chiare. La soluzione trovata prevede di integrare tre tipi diversi di analisi e interpretazione: architettonica, prospettica e percettiva.
Nel percorrere questo studio, si è scelta l’opera emblematica di Giovanni Battista Piranesi come terreno di sperimentazione: l’affascinante serie delle Carceri, le oscure visioni che la mente nera dell’incisore veneziano ha ideato negli anni giovanili (1749-50) e rielaborato dopo una decina d’anni (1760-61). Sfruttando l’opportunità fornita dalle Carceri di avere due versioni di una stessa opera, si è, inoltre, definito un metodo per poterle confrontare graficamente al fine di metterne in evidenza le differenze e completare l’interpretazione generale dell’opera.
La ricerca si struttura nelle tre parti che compongono il presente volume.
Una prolusione, di carattere più teorico, introduce la figura di Piranesi e motiva la scelta del termine u-topico che è stato utilizzato nel titolo, oltre a fissare altre questioni semantiche.
La seconda parte della ricerca, principalmente sperimentale, riguarda il tema dell’analisi e dell’interpretazione dello spazio immaginario. Qui vengono ripercorse tutte le fasi che hanno portato alla definizione del metodo di ricerca su questo tema.
La terza parte, anch’essa sperimentale, è incentrata sul confronto tra versioni diverse di una stessa opera: dall’applicazione di tecniche di image processing e di digital imaging all’interpretazione dei risultati.The research concerns the analysis and interpretation of spaces represented in graphic works on architectural themes generated without a rigorous application of perspective rules and architectural canons. In these cases, perspective restitution alone is not viable as a tool for analysing and interpreting spaces in three dimensions. Reconstructive hypotheses are complex and must be pursued in other ways.
The proposed method has found other paths available, both by using representation science tools and involving other disciplines where the latter has failed to provide clear answers. The solution involves integrating three different types of analysis and interpretation: architectural, perspective, and perceptive ones.
In pursuing this study, the emblematic work of Giovanni Battista Piranesi was chosen as a ground for experimentation: the fascinating series of Carceri, the obscure visions that the black mind of the Venetian engraver conceived in his youth (1749-50) and reworked about ten years later (1760-61). The Carceri provided the opportunity to have two versions of the same work, so a method was defined to compare them graphically to highlight the differences and complete the work’s general interpretation.
The research is structured in the three parts that make up this volume.
A prologue of a more theoretical nature introduces the figure of Piranesi and motivates the choice of the term ‘u-topical’ that was used in the title, as well as fixing other semantic questions.
The second part of the research, mainly experimental, deals with the analysis and interpretation of imaginary space. Here, all the stages that led to the definition of this theme’s research method are retraced.
The third part, also experimental, focuses on comparing the different versions of the same work: from the application of image processing and digital imaging techniques to the interpretation of the results
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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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
Giovanni-Ovadiah il proselito da Oppido, viaggiatore e musicista dell’età normanna, Atti del convegno internazionale, Oppido Lucano (PZ), 28-30 marzo 2004
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