1,720,963 research outputs found
L'insediamento neolitico nella media valle ofantina: l'area di Palata (Canosa di Puglia)
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Attività produttive nel villaggio neolitico di Masseria Candelaro (FG): l’apporto dell’indagine tecnologica e funzionale dell’industria litica.
No full textAPPLICAZIONE DI UN PROTOCOLLO ANALITICO NON DISTRUTTIVO MULTIPARAMETRICO PER LO STUDIO DELLE SELCI: DATI PRELIMINARI DA ALCUNI SITI NEOLITICI DELLA PUGLIA
No full textNegli ultimi decenni, la ricerca archeometrica sulle ossidiane ha permesso di definire un quadro abbastanza chiaro di quella che è stata la circolazione nel Mediterraneo centrale in età preistorica, a differenza di ciò che è avvenuto per la selce. Gli studi archeometrici sui materiali selciferi sono relativamente meno numerosi e discontinui nello spazio e nel tempo. Le difficoltà nell’individuare chiari caratteri discriminanti per riconoscere le provenienze, rende più difficile comparare materiali da diverse regioni e ricostruire le antiche vie di circolazione. Le attuali conoscenze archeologiche sulla circolazione della selce nel Mediterraneo centrale identificano il Promontorio del Gargano come uno dei principali giacimenti primari. Inoltre, il Gargano è posizionato su uno degli ipotizzati percorsi di diffusione del Neolitico nell’Italia meridionale, ovvero il ponte di isole adriatiche che collegano la Croazia meridionale con la Puglia. I dati petrografici e chimici precedentemente ottenuti su una selezione di 50 campioni di selce dai distretti estrattivi e da affioramenti geologici in area garganica hanno fornito un database di riferimento da comparare con i nuovi dati ottenuti da strumenti in selce e debitage provenienti dai siti di Scaloria, Masseria Candelaro, Monte Aquilone (Tavoliere) e Balsignano e Madonna delle Grazie (Murge). Nuovi dati colorimetrici (CIELAB) e chimici (pED-XRF) su 80 campioni archeologici mostrano che la maggior parte dei manufatti del Tavoliere, con pochi campioni di area murgiana, condividono le stesse caratteristiche chimiche e cromatiche. Inoltre, le selci di Madonna delle Grazie e Balsignano mostrano dei raggruppamenti composizionali non compatibili con quelli dei distretti estrattivi del Gargano. Le dimensioni ridotte di molti di questi manufatti indicherebbe l’uso di giacimenti secondari di selce, probabilmente riconducibili ai depositi continentali del Tavoliere, non ancora caratterizzati
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
Osteopetrosis tarda in an adult skeleton from Palata 2 (Ofanto river valley Canosa - south Italy): radiological, hystological and laser microscopy study
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
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
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