1,720,983 research outputs found
Interpreting the Quina and demi-Quina scrapers from Acheulo-Yabrudian Qesem Cave, Israel: Results of raw materials and functional analyses
No full textQuina scrapers are well-known components of the European Middle Paleolithic Mousterian. A similar production process was detected within the lithic assemblages of the Levantine Acheulo-Yabrudian (∼400–200 ka). This study combines the results of use-wear and raw material analyses of 75 Quina scrapers and 133 demi-Quina scrapers from the Acheulo-Yabrudian site Qesem Cave, Israel, aimed at interpreting the function of Quina and demi-Quina at Qesem Cave, the considerations affecting the lithic choices involved in their production, and the behavioral and evolutionary implications. Each scraper was examined for use-wear and was assigned to a flint type and potential geologic source(s). Our results demonstrate a selective pattern of exploitation of flint which does not originate from the local Turonian outcrops, specifically for the manufacture of Quina and demi-Quina scrapers. This suggests a thoughtful, well-planned effort, taking into consideration the flint traits and future function. This pattern repeats itself throughout time, reflecting a high degree of familiarity with the potential sources located around the cave, implying the existence of knowledge transmission mechanisms concerning the location of specific flint sources and their acquisition methods, as well as concerning exploitation preferences
Techno-functional analysis of small recycled flakes from Late Acheulian Revadim (Israel) demonstrates a link between morphology and function
No full textRevadim is a multi-layered Late Acheulian site in the Levant which has yielded rich lithic assemblages comprising dozens of handaxes, as well as many thousands of other items, mostly flakes. The techno-functional study presented here focuses on Layer C3, the densest layer at the site in terms of flint artefacts and animal bones. The lithic assemblage is characterized by an intense production of flakes, including a specific lithic recycling trajectory oriented towards the production of small flakes from existing flakes (Cores-On-Flakes). In this study, two categories of artefacts are sampled: the flakes used as cores for the production of new blanks (termed here COF-FFs) and the small flakes produced from them (termed BPFCs or products of recycling). Use-wear analysis conducted mainly at a low magnification, combined with residue analysis and a typo-technological characterization of the artefacts demonstrated that the small flakes produced from these COF-FFs were the desired end-products of this lithic trajectory, with a rather high percentage of used items while the COFs were rarely used, confirming their role as cores. The characterization of the used edges suggests a correlation between the activities performed and the different types of small flakes produced. Our results demonstrate the existence of a well-defined link between small flakes form and functionality, highlighting the capability of the Revadim Lower Paleolithic hominins to produce artifacts with pre-determined size, morphology, and specific utilizable edge features, suitable for the execution of anticipated targeted tasks
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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