1,720,973 research outputs found
Middle Paleolithic Occupation of the Moroccan Sahara: Open Air Sites of the Tafilalt
No full textThe Tafilalt region and the Drâa Valley (Moroccan Sahara) have been prospected since 2006 by an Italian-Moroccan team with the aims of identifying and describing important prehistoric sites dating from the Acheulean to the Iberomaurisian. Although the lithic industries were found in surface contexts, the total absence of data for the region means that the data obtained are an important contribution to a better definition of the prehistoric occupation in the Tafilalt region. The purpose of this paper is to highlight, where possible, the similarities / differences between the different Middle Paleolithic complexes as well as to identify productive strategies adopted, also in terms of raw materials exploitation.
The Middle Paleolithic sites of the Tafilalt are characterized by a differential utilization of raw material (in terms of the morphometry of the exploited pebbles/outcrops and physical characteristics of raw materials), by a coexistence of different reduction sequences, and by an opportunistic behavior. All sites, including those in which Aterian elements were identified, are characterized by the presence of Levallois, discoid and opportunistic (cf. S.S.D.A.) methods. In the sites where the tanged pieces are attested, the laminar method seems to acquire greater significance. It is important to emphasise that the substrate of the production is homogeneous in all sites, indicating an entrenched technological continuity during the Middle Palaeolithic of the region. All sites were sampled in a systematic way in order to maximize knowledge on the technical behavior that characterized the Middle Paleolithic in South-East Morocco
The Levallois debitage in the Amane Oukider site (South-West Morocco):Technological analysis of a standardized assemblage [Le débitage Levallois du site d’Amane Oukider (Sud-Est du Maroc) : analyse technologique d’un assemblage standardisé]
No full textLe site d’Amane Oukider (Tinghir, Anti-Atlas) a été étudié dans le cadre d’une coopéra-tion italo-marocaine dont l’objectif est la réalisation d’une carte archéologique du Sud-Estmarocain. Il s’agit d’un site de plein air situé près des gîtes de matière première consistant en affleurements de dolérites. Seule la méthode Levallois (linéale et récurrente centripète)est attestée et les produits de plein débitage ont été systématiquement emportés en dehors du site. Les éclats Levallois préférentiels sont caractérisés par un très haut niveau de stan-dardisation et le contexte régional permet de supposer qu’ils ont été probablement utilisés en tant que supports pour la fabrication d’hachereaux
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Get PDFWe 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
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