1,721,190 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
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
Per una valutazione delle scuole. Oltre l'adempimento
No full textQual è la relazione tra valutazione e miglioramento nel sistema nazionale di
valutazione? Quali attori sono coinvolti nella valutazione delle scuole e in che
modo partecipano? Come si può apprendere dai processi valutativi? Sono solo
alcune delle domande cui il volume intende rispondere attraverso una prospettiva
plurale che, oltrepassando gli aspetti di carattere attuativo, offra al lettore
una riflessione articolata e vivace sul tema della valutazione delle scuole.
Il libro è strutturato in tre parti: nella prima, delle riflessioni, gli autori si
confrontano sulle principali implicazioni teoriche e professionali del sistema
nazionale di valutazione, riprendendo il dibattito corrente; nella seconda, delle
pratiche, si presentano i principali risultati delle sperimentazioni e di alcune
ricerche empiriche condotte sul tema; completa il testo il racconto delle esperienze
da parte di alcuni degli attori direttamente coinvolti nella valutazione
delle scuole
La valutazione delle scuole: dal modello alla pratica
No full textQual è la relazione tra valutazione e miglioramento nel sistema nazionale di
valutazione? Quali attori sono coinvolti nella valutazione delle scuole e in che
modo partecipano? Come si può apprendere dai processi valutativi? Sono solo
alcune delle domande cui il testo prova a rispondere attraverso una prospettiva
plurale che, oltrepassando gli aspetti di carattere attuativo, offra al lettore
una riflessione articolata e vivace sul tema della valutazione delle scuole
Information-based multi-assets artificial stock market with heterogeneous agents
No full textIn this paper, an artificial stock market characterized by heterogeneous and informed agents is presented. The heterogeneous agents are seen as nodes of sparsely connected graphs. The agents trade risky assets and are characterized by sentiments, amount of cash and stocks owned. Agents share information and sentiments by means of interactions determined by graphs. A central market maker (clearing house mechanism) determines the price processes for each stock at the intersection of the demand and supply curves. In this framework, the statistical properties of the univariate and multivariate process of prices and returns are studied. Importantly, concerning univariate price processes, the proposed model is able to reproduce unit root, volatility cluster and fat tails of returns. The multivariate price process exhibits both static and dynamic stylized facts, in particular the presence of static factors and common trends. Static factors are studied making reference to the cross-correlation between returns of different stocks, whereas the common trends are investigated considering the variance-covariance matrix of prices. The proposed approach allows to endogenously reproduce the multivariate stylized facts
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
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