1,721,017 research outputs found
Infección por virus encefalitis Saint Louis y West Nile en perros de Anisacate, Córdoba (Argentina): su utilidad en la vigilancia de flavivirus neurotropos
Get PDFFil: Spinsanti, Lorena. Universidad Nacional Villa María; Argentina..Fil: Contigiani, Marta. Universidad Nacional Villa María; Argentina..Fil: Díaz, María Pilar. Universidad Nacional Villa María; Argentina..Fil: Gleiser, Raquel. Universidad Nacional de Córdoba; Argentina..Fil: Currenti, Luisina. Universidad Nacional de Córdoba; Argentina.
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
In vitro antiviral activity of nordihydroguayretic acid and its tetramethylated derivative on Arbovirus with medical-veterinary importance
No full textIn the search for new antiviral agents from native plant species, we began studying Larrea divaricata CAV. (Zigophyllaceae) and its main metabolite: nordihydroguaiaretic acid (NDGA). The antiviral effect of NDGA and its derivatives has been reported in numerous studies, the range of viruses evaluated is wide. However, there are few reports on arboviruses. We aimed to evaluate the in vitro effect of NDGA and its tetra methylated derivative, NDGA-4-M, on arbovirus: Chikungunya (CHIKV), St. Louis encephalitis (SLEV), Bunyamwera (BUNV) and Dengue types 1 and 4 (DENV-1, DENV-4), trying to establish the stages of the viral replication cycle affected.Fil: Martinez, Florencia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Cordoba. Facultad de Medicina. Instituto de Virología; ArgentinaFil: Aguilar, Javier. Universidad Nacional de Cordoba. Facultad de Medicina. Instituto de Virología; ArgentinaFil: Contigiani, Marta. Universidad Nacional de Cordoba. Facultad de Medicina. Instituto de Virología; ArgentinaFil: Núñez Montoya, Susana Carolina. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Departamento de Farmacia. Cátedra de Farmacognosia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto Multidisciplinario de Biología Vegetal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto Multidisciplinario de Biología Vegetal; ArgentinaFil: Konigheim, Brenda Salome. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Cordoba. Facultad de Medicina. Instituto de Virología; ArgentinaReunión Anual de Sociedades de BiocienciaMar del PlataArgentinaSociedad Argentina de Investigación ClínicaSociedad Argentina de Farmacología ExperimentalSociedad Argentina de BiologíaSociedad Argentina de ProtozoologíaAsociación Argentina de NanomedicinasAsociación Argentina de Ciencia y Tecnología de Animales de LaboratorioHistochemical Societ
Specific detection of all members of the Venezuelan Equine Encephalitis complex: development of a RT-Nested PCR
No full textVenezuelan Equine Encephalitis (VEE) complex belongs to alphavirus genus in the family Togaviridae. Several species of this complex are pathogenic to humans. VEE infections can produce severe or mild disease, and many cases remain undiagnosed. A specific and sensitive reverse transcriptase nested polymerase chain reaction (RT-Nested PCR) method was developed for the detection of all VEE subtypes, including Rio Negro Virus (RNV) (subtype VI), which circulates only in Argentina. Degenerated primers were designed and thermal cycling parameters were standardized. This technique is suitable for rapid and specific detection of these viruses, and may be useful for diagnosis and surveillance.Fil: Pisano, María Belén. Universidad Nacional de Córdoba. Facultad de Medicina. Instituto de Virología Dr. J. M. Vanella; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; ArgentinaFil: Sánchez Seco, María Paz. Instituto de Salud Carlos III; EspañaFil: Ré, Viviana Elizabeth. Universidad Nacional de Córdoba. Facultad de Medicina. Instituto de Virología Dr. J. M. Vanella; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; ArgentinaFil: Farías, Adrián A.. Universidad Nacional de Córdoba. Facultad de Medicina. Instituto de Virología Dr. J. M. Vanella; ArgentinaFil: Contigiani, Marta Silvia. Universidad Nacional de Córdoba. Facultad de Medicina. Instituto de Virología Dr. J. M. Vanella; ArgentinaFil: Tenorio, Antonio. Instituto de Salud Carlos III; Españ
Caracterización biológica de cepas del virus Encefalitis San Luis en células de la inmunidad innata
No full textLos flavivirus transmitidos por mosquitos son una amenaza actual y emergente en todo el mundo. Dentro de este género, el virus Encefalitis San Luis (VESL) causa una forma severa de enfermedad neuroinvasiva donde la respuesta inmune es un componente crucial de la defensa del huésped. En este trabajo se investigó la interacción entre VESL y células de la inmunidad innata, en un modelo de infección in vitro de monocitos humanos (células U937) con cepas de distinta virulencia y condiciones epidemiológicas de aislamiento (CbaAr-4005 y 78V-6507). Se evaluó la capacidad de infectar y replicar del virus, como también el efecto citopático y la cinética de viabilidad de monocitos durante la infección. Los resultados demostraron la susceptibilidad de los monocitos a la infección, replicación y muerte por ambas cepas virales. Sin embargo, se hallaron diferencias significativas entre ellas. La cepa epidémica y de mayor virulencia CbaAr-4005 registró una tasa de infección y replicación superior a la de la cepa endémica y de menor virulencia 78V-6507. Se comprobó también que el VESL indujo la muerte de monocitos humanos, dependiendo del tiempo post-infección (pi) y de la cepa. Así, CbaAr-4005 provocó a partir del día 3 pi el doble de mortalidad celular que 78V-6507. Además, en los monocitos infectados se observaron alteraciones de parámetros morfológicos que podrían relacionarse con el tipo de mecanismo de muerte celular asociado a la infección por VESL.Fil: Caula, Cinthya. Universidad Católica de Córdoba. Facultad de Ciencias Químicas; ArgentinaFil: Cooke, Paula María. Universidad Católica de Córdoba. Facultad de Ciencias Químicas; ArgentinaFil: Rivarola, María Elisa. Universidad Nacional de Córdoba. Facultad de Medicina; ArgentinaFil: Contigiani, Marta Silvia. Universidad Nacional de Córdoba. Facultad de Medicina; ArgentinaFil: Orsilles, Miguel Ángel. Universidad Católica de Córdoba. Facultad de Ciencias Químicas; ArgentinaFil: Spinsanti, Lorena Ivana. Universidad Nacional de Córdoba. Facultad de Medicina; Argentin
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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