1,721,137 research outputs found
Structural and tectonic evolution of the Marampa Group fold thrust belt, northwestern Sierra Leone, West Africa
No full textThe structural evolution of the Marampa Group, a poorly described 60 km wide NNW trending fold thrust belt in west central Sierra Leone is presented in detail for the first time. The Marampa Group is flanked by the Rokel River Group to the east and gneisses and amphibolites of the Kasila Group to the west. Previous workers have interpreted this mobile belt as a Klippe of the Kasila Group derived from somewhere west of its present outcrop or as an autochthonous volcano-sedimentary deposit engulfed by granitic basement. The upper age of deformation is constrained by the Precambrian to Ordovician Saionya Scarp Group sedimentary rocks which lie unconformably on the Rokel River Group. The earliest structures consist of flat lying thrusts which transported Marampa Group metasediments and basal metavolcanics eastward over a granitic gneiss basement. The thrusting was associated with the development of a pervasive L-S fabric containing a greenschist facies metamorphic assemblage in the foreland but developing an amphibolite facies metamorphic assemblage closer to the hinterland due to late thrust stacking. This early event was followed by extensional collapse and intrusion of porphyroblastic granites. Erosion of the uplifted mass sourced the Rokel River Group deposited in flanking basins marking a renewed phase of extension. Renewed east-west crustal shortening ascribed to the Pan-African event inverted earlier extensional structures thrusting the Rokel River Group westward over the Marampa Group and leading to local E-W facing confrontations. This compressive phase was accompanied by metamorphic changes of a lesser intensity showing a similar east to west gradient characterised by very low greenschist facies metamorphism in the east and upper greenschist facies metamorphism in the west, this time because a deeper level of the crustal pile was thrust faulted over the Marampa Group in the west in comparison to the eastern areas. Subsequently the eastern flanks of the mobile belt were subject to a NNW trending ductile and brittle sinistral strike-slip regime that locally produced ENE oriented folds and thrusts and low greenschist facies metamorphic reconstructions in the vicinity of late shear zones.</p
Harwood, Richard, Samuel Wilkins and Johnathan Sellman ordered to pay 14,000 pounds to the State of Maryland for use of John Snowden and Caleb Dorsey, January 8, 1799
No full textHarwood, Richard, Samuel Wilkins and Johnathan Sellman ordered to pay 14,000 pounds to the State of Maryland for use of John Snowden and Caleb Dorsey. [Anne Arundel County]
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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