1,721,156 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
Indagini sulle reliquie attribuite a "San Luca Evangelista", Basilica di Santa Giustina in Padova: studio isotopico e microchimico del piombo, della bara e delle epigrafi
No full textQuesto lavoro espone i risultati della studio geochimico-isotopico del materiale plumbeo proveniente dalla Basilica di Santa Giustina. Il materiale analizzato e’ rappresentativo della cassa e del coperchio della bara di San Luca; della cassa di san Mattia; delle cupole e delle epigrafi. E’ stato inoltre studiato un campione di carbonato di piombo tolto da incrostazioni dello scheletro. La composizione isotopica del piombo, determinata mediante spettrometria di massa, delle reliquie conservate in Santa Giustina indica che i campioni della cassa e il carbonato di piombo adeso alle ossa del bacino sono uguali e nettamente diversi dai campioni del caperchio.
Questi ultimi risultano invece simili ai frammenti della cassa di san
Mattia, ritenuta di fattura cinquecentesca. I risultati ottenuti sui
campioni delle cupole e delle epigrafi indicano che essi costituiscono un gruppo piuttosto eterogeneo di materiale lavorato e posto in opera in epoca moderna e ottenuto da miscelazione di piombo proveniente da più fonti. I manufatti antichi, rappresentati dalla cassa di san Luca e dal carbonato di piombo di incrostazione dello scheletro, sono riferibili al I-IV secolo d.C. La composiziane isotopica del piombo di tali manufatti nan é riconducibile alla produzione di specifici giacimenti, ed é pertanto interpretabile come effetto del riciclaggio di metallo o rottami metallici provenienti dalle varie miniere dell’area mediterranea, un processo molto diffuso durante il periodo imperiale
Sr ISOTOPIC SHIFT AS A POTENTIAL GLOBAL GEOCHEMICAL MARKER FOR THE BASE OF THE RHAETIAN STAGE
No full textVariations 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
The enriched signature of Central Atlantic Magmatic Province basalts; constraints from mineral trace element and isotopic compositions of the Kerforne dike, France
No full textAppropriate 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
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