1,721,074 research outputs found
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
Plume-Fracture Zone interactions in the NE Atlantic
Full text linkTypically, the change in lithospheric thickness associated with fracture zones relates directly to the
vigor of secondary convection or mantle flow patterns. Therefore, one might expect that mantle
flow considerably boosted by the presence of a mantle plume would easily overcome the
lithospheric steps created at fracture zone locations. However, to date, there are no studies to
verify this assumption. Numerical models based on an example from the SW Indian Ridge suggest
that the axial flow driven by a plume (the Marion plume) is indeed likely to be curtailed by the longoffset
fracture zones1.
We have investigated the interactions between the Jan Mayen fracture zone and Iceland mantle
plume in the NE Atlantic by considering (a) the lithospheric and asthenospheric regional
configuration and (b) the geochemistry of rocks produced by submarine volcanism.
Several global lithospheric models indicate a thinning of the lithosphere on both sides of the Jan
Mayen Fracture transform, despite the difference in age of the two adjacent oceanic basins.
However, the tomographic models indicate a gap in the asthenospheric flow at the lithosphereasthenosphere
depth under Jan Mayen transform fault, and only a narrow northward channel of
this flow is visible under the westernmost part of the fracture zone.
Vesteris seamount is an alkaline seamount placed in the central part of the Greenland Basin,
located ca. 480 km west from slow-spreading Mohn's ridge and ca. 250 km north from the Jan
Mayen Fracture Zone. Vesteris is a solitary volcanic center far away from an active ridge regime
with an eruptive age ranging from 650 – 10 ka 2. Here we report new results from geochemical
analysis of several samples dredged during the East Greenland Sampling campaign EGS-2012 from
the flanks of Vesteris. Whole-rock major and trace elements, together with isotopes and olivine
phenocryst mineral data, are used to decipher the source of volcanism at Vesteris Seamount.
The Sr-Nd-Pb isotopic signatures indicate that Vesteris volcanism is unrelated to the Iceland
mantle plume. Low NiO concentrations in highly forsteritic olivines from Vesteris alkali basalt
suggest that the source was dominantly peridotitic. Rare Earth Elements profiles indicate very low
degrees of partial melting of a deep mantle source in the presence of residual garnet
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
Gaipa_et_al_Supplemental_Materials – Supplemental material for Health technology assessment–based approach to flow cytometric immunophenotyping of acute leukemias: a literature classification
No full textSupplemental material, Gaipa_et_al_Supplemental_Materials for Health technology assessment–based approach to flow cytometric immunophenotyping of acute leukemias: a literature classification by Giuseppe Gaipa, Eugenio Erba, Marco Danova, Giuliano Mazzini, Adriano Venditti, Barbara Buldini, Giorgina Specchia, Oscar Maglia, Annalisa Kunkl, Maria Matilde Ciriello, Mario Arpinati, Francesco Mannelli, Francesco Lanza, Roberta Riccioni, Vanna Pistotti and Giovanni Apolone in Tumori Journal</p
The Chachil Limestone (Pliensbachianeearliest Toarcian) Neuquén Basin, Argentina: UePb age calibration and its significance on the Early Jurassic evolution of southwestern Gondwana
Full text linkNew radiometric UePb ages obtained on zircon crystals from Early Jurassic ash layers found within beds of the Chachil Limestone at its type locality in the Chachil depocentre (southern Neuquén Basin) confirm a Pliensbachian age (186.0 0.4 Ma). Additionally, two ash layers found in limestone beds in Chacay Melehue at the Cordillera del Viento depocentre (central Neuquén Basin) gave Early Pliensbachian (185.7 0.4 Ma) and earliest Toarcian (182.3 0.4 Ma) UePb zircon ages. Based on these new datings and regional geological observations, we propose that the limestones cropping out at Chacay Melehue are correlatable with the Chachil Limestone. Recent data by other authors from limestones at Serrucho creek in the upper Puesto Araya Formation (Valenciana depocentre, southern Mendoza) reveal ages of 182.16 0.6 Ma. Based on these new evidences, we consider the Chachil Limestone an important Early Jurassic stratigraphic marker, representing an almost instantaneous widespread flooding episode in western Gondwana. The unit marks the initiation in the Neuquén Basin of the Cuyo Group, followed by widespread black shale deposition. Accordingly, these limestones can be regarded as the natural seal of the Late Triassic eearliest Jurassic Precuyano Cycle, which represents the infill of halfgrabens and/or grabens related to a strong extensional regime. Paleontological evidence supports that during Pliensbachianeearliest Toarcian times these limestones were deposited in western Gondwana in marine warm water environments.Fil: Leanza, Hector Armando. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales; ArgentinaFil: Mazzini, Adriano. University Of Oslo. Faculty Of Mathematics And Natural Science; NoruegaFil: Corfu, Fernando. University Of Oslo; NoruegaFil: Llambías, Eduardo J.. Universidad Nacional de La Plata; ArgentinaFil: Svensen, Henrik. University Of Oslo; NoruegaFil: Galland, Olivier. University Of Oslo; NoruegaFil: Planke, Sverre. University Of Oslo; Norueg
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