1,720,967 research outputs found
Marmi imitati e marmi reimpiegati in Ostia Tardoantica
No full textEsame analitico dei materiali lapidei certamente reimpiegati nel Mitreo dei marmi colorati. Studio delle pitture imitanti i marmi nel Mtreo dei marmi colorati di Ostia antica
Symbols of Identity and Culture of the Monogram in the Late Antique Mithraism : The Case of Ostia
Full text linkThe highest number of mithraea in urban context of the ancient world come from Ostia. Although we do not know the whole city, mithraea have been found in all districts of the town. The spread and fortune of the Mithraic worship are also attested by the plenteous epigraphic and sculptural materials. This research deals with the Mithraism at Ostia, focusing on the particular case of monograms, just mentioned by Giovanni Becatti in his seminal work about mithraea at Ostia, dating back to more than sixty years ago. After the recent discovery of the Mithraeum of colored marbles by the archaeologists of the Ostia Marina Project (University of Bologna), it seems necessary to examine and contextualize the phenomenology of Mithraic monograms at Ostia, as is done in relation to similar processes which involve the Christian world
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
Archeologia della balestra a Cencelle
No full textNell’ambito delle nuove indagini archeologiche condotte nel 2019 da parte del Progetto Leopoli-Cencelle della Sapienza presso l’abitato medievale di Cencelle, è emerso un nuovo edificio posto nel settore occidentale della città che ha restituito, tra i numerosi materiali, due punte di dardi da balestra in ferro. Partendo da tale ritrovamento e dall’analisi dei suddetti manufatti, si intende in questa sede prendere in esame simili rinvenimenti nell’ambito della stessa Cencelle e del Lazio settentrionale, giungendo così a produrre un breve status quaestionis sull’argomento e ad approfondire la problematica dell’affermarsi e dell’evolversi della balestra e delle armi da tiro in epoca basso-medievale, fino alla generalizzata diffusione delle armi da fuoco, anche in relazione a contesti noti
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
"Effetto Notte". Problemi e sistemi di illuminazione nel mitraismo tardoantico
No full textUna particolare problematica legata alla religione mitraica riguarda i sistemi di illuminazione. Nella ritualità svolta nelle ore crepuscolari e notturne la luce artificiale - ottenuta per mezzo di lampadari e lucerne – gioca un ruolo spesso decisivo. L’atmosfera mistica era ottenuta con particolari dispositivi. Anche la luce naturale era studiata per ottenere certi effetti in determinate ore del giorno: la disposizione delle porte, delle finestre e delle aperture era volta a sottolineare la valenza simbolica e spirituale della luce. In questa sede si intendono analizzare, con esempi mirati, le scelte operate nel mitraismo in relazione al problema dell’illuminazione e all’importante ruolo da essa rivestito nello svolgimento dei riti.A particular problem related to Mithraic religion concerns the lighting systems. In the crepuscolar and night rituality the artificial light - obtained through chandeliers and oil lamps - often plays a decisive role. The mystical atmosphere was achieved in special ways, also with the natural light, that allowed to obtain particular effects in certain moments of the day: the arrangement of the doors, windows and openings was intended to emphasize the symbolic and spiritual value of the light. Here we intend to analyze, with some examples, the choices made by Mithraism in relation to the problem of enlightenment and the important role it played during the rituals
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