1,720,956 research outputs found
Analytical interpretation on different clay materials from the site of Ighrama Aousser (Morocco)
No full textThe data collected on the furnace material lead to hypothesize that the local artisans were familiar with the local materials and their technological characteristics. The analysis performed on the pottery fragments distinguished two classes of pottery with different refinement of the mixture: the one less refined for common use in the preparation and storage of food, and the one more refined for the upper- class use. All these data, connected with the particular assessment of the Citadel, reinforce the hypothesis of this Site as an important economic centre for metal extraction and processing
Interpretazioni analitiche su varie tipologie di materiali ttili dal sito di Ighram Aousser (Marocco)
No full textThe data collected from different instrumental investigations demonstrated the validity of the analytical procedure designed to contribute to the identi cation of metallurgical activity inside and outside the walls of the Fortress of Ighram Aousser, in the past. Some data con rm the archaeological hypothesis, while others indicate original paths for the determination of the metalwork in the mine area. In particular, the results obtained on the ceramic fragments led to the identi cation of a large class of commonly used items. A re ned little dough due to daily function for food preparing characterizes the large group of pottery fragments, instead the group characterized by more re ned body is connected with to a higher-class use. These results, connected with the particular arrangement of the fortress that presents a residential and administrative area, enforce the archaeological hypothesis about the economic importance of this site
Preliminary study on Sharpey's fibers in a dental hominin sample from the Middle Pleistocene
No full textDefinizione di un protocollo analitico per lo studio archeometrico di materiali piro-metallurgici del sito di Auoam (Marocco)
No full textThe purely archaeometric de nition of historical and technological background of extraction techniques and pyrometallurgical processing of metals in Morocco of punic-mauritanian requires the creation of an analytical protocol covering every stage of the metallurgical process.
These analysis started in 2011 and involved the development of particular procedure, in order to obtain results in broad-spectrum. The present work is related to the identi cation of metallurgical slags trough different analytical techniques that allow to inve- stigate the individual physical-chemical features of the material. The data where obtained by petrographic analysis, thin-layer investigation, scanning electron microscope (SEM) coupled to the energy dispersion system (EDS), X-ray diffraction (XRD), ther- mogravimetric analysis (TGA) and metallographic investigation.
The compendium of the analytical results, are the basis for a development of this procedure working with the open-source GIS sof- tware quantumgis (QGIS). Considering the special input data, it was necessary to have additional information related to satellite images, used to de ne different micro-areas of interest
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
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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