1,721,027 research outputs found
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
Exploring the past of long-distance trade in Central Africa. Copper production and exchange networks in the 9th-14th centuries
No full textThe long-distance trade routes would have played a significant role in the socio-political history of Central Africa during the last 1000 years. However, the lack of sources predating the 19th century has prevented for a long time any detailed study of their history. Over the last decade, however, the amount of archaeological data as well as the development of cross disciplinary approaches and new tools allow assessing the evolution of exchange networks in Central Africa, and to explore their origin through material culture. In this respect, copper is particularly interesting since, considered as a highly valuable metal, it was produced in only a few regions, such as the Copperbelt (south-east Democratic of Congo). While copper is produced and locally traded in Central Africa since, at least the 6th century CE, its production and trade dramatically increase during the 9th-14th-century period. The development of long-distance trade at that time is clearly demonstrated by the connections between the Copperbelt and areas south of the Zambezi, or by the first Indian ocean coastal trade items on Central African sites. In that same period, various regions of Central Africa witnessed major socio-political and cultural changes, especially in connection with the rise of hierarchical societies. Together with other goods, the 9th-14th-century copper exchanges offer the opportunity to explore the origin of the major long-distance trade routes and their running. As such, they allow formulating hypotheses about the respective roles played by production centres and rising polities in such exchanges and their subsequent evolution.info:eu-repo/semantics/nonPublishe
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
Cuivre, entités politiques et réseaux d’échange au sud de l’Afrique centrale durant le 2e millénaire AD
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Upemba Depression
No full textThe Upemba Depression (southeast DRC) is unique in providing a deep historical background to the sociopolitical history of Central Africa. The excavation of around three hundred graves, one of the largest groups in sub-Saharan Africa, allowed archaeologists to build a chrono-cultural sequence running from the sixth century ce to the nineteenth century. During the Kamilambian (ca. sixth–eighth century ce), a few scattered ironworking communities were settled in the Upemba Depression. At the end of the first millennium ce, the number of sites increased and two independent – though related – cultures, the Kisalian and the Katotian, flourished. The development of a hierarchical organization of society is displayed by elite burials containing a large amount of goods and status symbols. Fish was one of the main resources of the Upemba Depression and, along with other items, was traded in regional networks for luxury goods such as copper or Indian Ocean shells. Around the fourteenth century, the Kisalian culture was replaced by the Kabambian. Social inequalities became sharper and exchange networks were extended. Material culture suggests that the Upemba Depression was progressively integrated in the Luba kingdom during this period until its full integration in the nineteenth century. Despite major changes throughout the sequence, material culture suggests a cultural continuity between the different archaeological cultures of the Upemba Depression and that political tradition and some prominent symbols of authority of the major Central African polities in the eighteenth and nineteenth centuries arose during the first millennium ce.info:eu-repo/semantics/publishe
Looking into the past using pottery and metallurgical techniques. Examples from the Congo Basin
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