1,721,030 research outputs found
Malone C., S. Stoddart (eds.).-Patterns in Protohistory, Papers in Italian Archaeology IV, part III. (BAR International Series 245) 1985
No full textRuby Pascal. Malone C., S. Stoddart (eds.).-Patterns in Protohistory, Papers in Italian Archaeology IV, part III. (BAR International Series 245) 1985. In: Les Nouvelles de l'archéologie, n°29, automne 1987. pp. 63-64
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
Non-destructive method for the identification of ceramic production by portable X-rays Fluorescence (pXRF) : A case study of amphorae manufacture in central Italy
Full text linkPortable X-rays Fluorescence (pXRF) represents one of the most effective tools for in situ, non-destructive elemental analysis, which has a valuable application in the study of ceramic production. However, whilst the qualitative assessment of the composition of artefacts is reliable, the quantitative analysis can be biased by some limitations, due to instrumental features or materials properties. The analysis of ceramic materials is particularly challenging due to the lack of representative calibrations and standards, as well as the low density and poor homogeneity of samples. In this contribution, a method is proposed to fingerprint a ceramic production through pXRF analysis. At the site of Montelabate (Perugia) in central Italy four kilns were excavated revealing a production of amphorae. This site was therefore selected as a suitable case study for fingerprinting a ceramic production. After qualitative analysis, representative calibration standards were created based on different commercial clays and feldspars. These can help overcoming the well-known matrix effect, both physical and chemical, and may offer a representative and reproducible standard to be used in different laboratories. Alongside the precise assessment of composition, the possibility to fingerprint a production was also assessed using a different method, based on the intensity ratio between selected elements. The relevant elements were chosen based on their correlation and non-correlation. Correlated elements were attributed to the raw clay used for ceramic production and non-correlated elements were attributed to the specific fabric recipe. Accordingly, some benchmarks to identify the clays and fabric used in the site of Montelabate were identified. Amphorae found at other ancient commercial sites in the area of Rome were therefore also compared with these benchmarks in order to assess their provenience
Fingerprinting a production: analysis of clay technology from the Etruscan to the Roman period : case study of the Montelabate Project
No full textThe paper presents the preliminary results of an archaeometric study aiming to identify a model of pottery production in central Italy. The innovative nature of this interdisciplinary study is the establishment of a standard methodology to fingerprint pottery technology, using as a case study the results of the excavation of the Etruscan settlement of Col di Marzo and of four later Roman kilns at Montelabate (Perugia, Italy), in the framework of the Montelabate Project.
The study is part of a joint project between the Department of Chemistry (Università degli Studi di Milano) and the McDonald Institute (University of Cambridge) aiming to create a conceptual and practical non-destructive methodology applying X-rays Fluorescence (XRF) and near-infrared (NIR) spectroscopy analyses to the study of pre-Roman and Roman clay production
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
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