1,721,009 research outputs found
The 14/15 association as a paradigmatic example of tracing karyotype evolution in New World monkeys
No full textFluorescence in situ hybridization (FISH), especially chromosome painting, has been extensively exploited in the phylogenetic reconstruction of primate evolution. Although chromosome painting is a key method to map translocations, it is not effective in detecting chromosome inversions, which may be up to four times more frequent than other chromosomal rearrangements. BAC-FISH instead can economically delineate marker order and reveal intrachromosomal rearrangements. However, up to now, BAC-FISH was rarely used to study the chromosomes of New World monkeys partly due to technical difficulties. In this paper, we used BAC-FISH to disentangle the complex evolutionary history of the ancestral 14/15 association in NWMs, beginning from the squirrel monkey (Saimiri boliviensis). To improve the hybridization efficiency of BAC-FISH in NWMs, we “translated” the human BACs into Callithrix jacchus (CJA) BACs, which yielded much higher hybridization efficiencies on other NWM species than human BACs. Our results disclosed 14 synteny blocks in squirrel monkeys, 7 more than with chromosome painting. We then applied a subset of CJA BACs on six other NWM species. The comparison of the hybridization pattern of these species contained phylogenetic information to discriminate evolutionary relationships. Notably Aotus was found to share an inversion with Callithrix, thus definitely assigning the genus Aotus to Cebidae. The present study can be seen as a paradigmatic approach to investigate the phylogenetics of NWMs by molecular cytogenetics
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
Vol. 26, nº 30. Día Mundial contra las Hepatitis Víricas. Una visión transversal hacia el futuro
No full textEnfermedades de Declaración Obligatoria por provincias. Semana 29/2021 y acumulado desde semana 1/2021. Datos provisionales. Incluye además el artículo titulado 'Día Mundial contra las Hepatitis Víricas. Una visión transversal hacia el futuro', de Pérez Contreras, Marina. Garrido Hernández, Jose Manuel. Guillén Enríquez, Javier. Lorusso, Nicola.
Servicio de Vigilancia y Salud Laboral. DGSPOF. Consejería de Salud y Familias de la Junta de Andalucía.Ye
Vol. 26, nº 6. Enfermeras en Salud Pública en Andalucía
No full textContiene las Enfermedades de Declaración Obligatoria por provincias. Semana 05/2021 y acumulado desde semana 1/2021. Datos provisionales. Incluye además el artículo titulado 'Enfermeras en Salud Pública en Andalucía', de Llamas Martínez, Victoria; Lorusso, Nicola; Ruiz Cerezo, Pilar, Longo Abril, Guadalupe; Guillen Enríquez, F. Javier.Ye
Vol. 27, nº 02. SITUACIÓN EPIDEMIOLÓGICA DE LAS VARIANTES SARS-COV2 EN ANDALUCÍA
No full textEnfermedades de Declaración Obligatoria por provincias. Semana 01/2022 y acumulado desde semana 01/2022. Datos provisionales. Incluye además el artículo titulado 'SITUACIÓN EPIDEMIOLÓGICA DE LAS VARIANTES SARS-COV2 EN ANDALUCÍA', de Rafael Castaño Torres, Miguel Mingo Gómez de Celis Lorusso, Nicola. Servicio de Vigilancia y Salud Laboral. DGSPyOF..Ye
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
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