1,721,872 research outputs found
Superando Barreras: Inclusión y Aprendizaje en la Formación Profesional de Estudiantes con Necesidades Especiales
No full textMateos Marcos, Daniel; director de proyecto: Gil Gascón, Paula2023-2024Curso de Formación Pedagógica y Didáctica para Profesorado de Formación Profesional y DeportivaFacultad de Ciencias de la Educació
Desarrollo de un sistema de información contable y de gestión orientado hacia la planificación estratégica de pequeñas y medianas empresas de Presidencia Roque Sáenz Peña, a partir de la post pandemia del COVID-19
Full text linkFil: Kozak, Marcos Daniel. Universidad Nacional Del Chaco Austral; Argentina.Fil: Alvarez, Juliana. Universidad Nacional Del Chaco Austral; Argentina
BiGe-Onto: An Ontology-Based System for Managing Biodiversity and Biogeography Data
No full textRDF dataset generated by the BiGe-Onto project. It contains approximately 4.3M of triplets extracted from different data sets belonging to OBIS and GBIF. It also contains information on oceanographic campaigns of the Argentine initiative Pampa Azul.Fil: Zárate, Marcos Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentin
Evaluación de la actividad de nanopartículas de plata (AgNPs) como nuevos agentes anti-Trypanosoma cruzi
Full text link43 h. + Anexo. tabls.; figuras; ilus. Contiene Referencia BibliográficaFil: Juárez, Marcos Daniel. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Juárez, Marcos Daniel. Universidad Nacional de Córdoba. Facultad de Ciencias Médicas. Centro de Investigación de la Enfermedad de Chagas y Leishmaniasis; Argentina.Nanopartículas de plata (AgNPs) fueron obtenidas mediante síntesis natural a partir de un extracto de achicoria (Cichorium intybus) para probar su efecto parasiticida sobre epimastigotes y tripomastigotes de la cepa Y de Trypanosoma cruzi (TcII). La producción de AgNPs se realizó mediante reacciones de oxido-reducción a partir de nitrato de plata (AgNO3). Se caracterizaron el tamaño medio y concentración de las nanopartículas obtenidas. Se ensayó la citotoxicidad sobre la línea celular Vero proveniente de mono verde africano (Cercophitecus aethiops) mediante la técnica de captación del rojo neutro. La actividad en epimastigotes se evaluó mediante la exposición durante 96 h a diluciones seriadas de AgNPs a partir del nivel de máxima concentración no citotóxica (MCNC) reportada en el test de citotoxicidad. La actividad oxidativa fue cuantificada con la sonda H2DCFDA usando espectrofluorimetría. Se realizó microscopía de fluorescencia sobre los epimastigotes tratados con la IC50 de AgNPs y grupos control a las 96 h. La actividad en tripomastigotes se realizó con un ensayo en sangre de ratón obtenida a los 15 días post infección. Las AgNPs producidas presentaron una absorbancia máxima a una longitud de ≈440nm. El tamaño promedio fue de 67 nm y la concentración de 23 pM. El ensayo de captación del rojo neutro en la linea celular Vero arrojó un valor de MCNC para AgNO3 de 0,0007 mM (700pM) y de 3 pM para las AgNPs sintetizadas. Las AgNPs sobre epimastigotes arrojaron un valor de IC50=1,153 pM para AgNPs a las 96 horas de tratamiento, siendo la MCNC (3 pM) letal para el 100% de los parásitos. Las células presentaron daño evidente. El control con AgNO3 presentó una tasa de inhibición absoluta. Se observó actividad oxidativa en células expuestas a la IC50. En la forma tripomastigote se logró una inhibición máxima del ≈60% a la MCNC. La concentración efectiva 50 (EC50) fue de 2,58 pM.Fil: Juárez, Marcos Daniel. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Juárez, Marcos Daniel. Universidad Nacional de Córdoba. Facultad de Ciencias Médicas. Centro de Investigación de la Enfermedad de Chagas y Leishmaniasis; Argentina
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
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
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