1,720,969 research outputs found
Studying ancient crop provenance: implications from d13C and d15N values of charred barley in a Middle Bronze Age silo at Ebla (NW Syria)
No full textThe discovery of a storeroom full of barley and other cereals (L.9512) in the proto-historic site of Ebla has provided a
unique opportunity to study the centralized storage system of the early city-state from a different perspective.
Epigraphic evidence available within the site reveals a complex system of taxation which included gathering grain
tributes from satellite sites and redistributing semi-finished products such as flour. In this paper, we intend to explore
the possibilities of a combined approach to studying the storage system, based on estimated barley grain volumes
and d13C-d15N analyses. This approach is used to distinguish between grain from different harvesting sites and to
identify any grain cultivated using special agricultural practices (e.g. manuring or irrigation). The basic assumption
for this kind of analysis is that the growth-site conditions, natural or anthropogenic, of harvested cereals are reflected
in their grain size and d13C-d15N values. Since the remains found in the storeroom were charred, the first task was to
evaluate the effect of carbonization on the d13C-d15N and the size of the grains. Thus, the effect of charring was tested
on modern samples of Syrian barley landraces. Once it had been ascertained that fresh grains reduced to charred
remains retain their original biometric and isotopic traits, the ancient material was examined. Thirteen groups were
identified, each characterized by a specific average volume and specific carbon and nitrogen values. The analysis
revealed that what had first appeared to be a homogeneous concentration of grain was in fact an assemblage of barley
harvested from different sites
Processi di formazione di due discariche altomedievali del sito di Faragola: il contributo dell’analisi archeobotanica
No full textCarbon stable isotope analysis of 14C-AMS dated vegetal remains: a possible paleoclimatological signal at the III millenium BC Ebla site (Syria)
No full textProcessi di formazione di due discariche altomedievali del sito di Faragola: il contributo dell’analisi archeobotanica.
No full text
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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