1,721,097 research outputs found
Modelos y modelización científica en el nivel medio : concepciones y estrategias metacientíficas en estudiantes chaqueños
No full textFil: Coronel, Jorge Fabián. Universidad Nacional del Chaco Austral; Argentina.El presente trabajo de investigación tiene como objetivo general evaluar intervenciones didácticas con usos de narrativas del género literario de terror y misterio para el fomento de reflexiones metacientíficas sobre los modelos y la modelización en estudiantes del nivel medio de una unidad educativa de gestión privada de la provincia del Chaco
Sampling techniques in lithic debitage analysis. a case study : layer 2 peñas de la cruz 1.1 site, (Antofagasta de la Sierra, Catamarca).
No full textEste trabajo explora la incorporación de técnicas de muestreo en el análisis de desechos de talla. El objetivo general es la obtención de muestras que representen al conjunto de donde proceden, en este caso, los desechos de talla recuperados de la capa 2 (2°) del sitio Peñas de la Cruz 1.1, localizado en Antofagasta de la Sierra, Catamarca. A fin de lograr lo propuesto se evalúan los alcances y limitaciones de tres tipos de muestreo aplicados en un mismo lote. Con el objeto de dar cuenta de las actividades de talla llevadas a cabo en el sitio, se presentan los resultados del análisis técnico-morfológico llevado a cabo sobre una muestra de desechos de talla (n= 300) extraída de un lote mayor (N= 2377).Fil: Funes Coronel, Jorge Alejandro. Consejo de Investigaciones Científicas y Técnicas. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo; Argentina.This paper explores the incorporation of sampling techniques in lithic débitage analysis. The overall objective is to obtain samples representative of the entire set from which they originated, in this case, débitage recovered from layer 2 from Peñas de la Cruz 1.1 site in Antofagasta de la Sierra, Catamarca. In order to accomplish this goal, the limitations of three types of sampling applied to the same lot were evaluated. With the goal of revealing the lithic production activities carried out at the site, the results of the technological analysis of a sample of materials (n= 300) collected from a larger lot (N= 2377) are presented
Sampling techniques in lithic debitage analysis. A case study: Layer 2 Peñas de la Cruz 1.1 site, Antofagasta de la Sierra, Catamarca.
Get PDFEste trabajo explora la incorporación de técnicas de muestreo en el análisis de desechos de talla. El objetivo general es la obtención de muestras que representen al conjunto de donde proceden, en este caso, los desechos de talla recuperados de la capa 2 (2°) del sitio Penas de la Cruz 1.1, localizado en Antofagasta de la Sierra, Catamarca. A fin de lograr lo propuesto se evalúan los alcances y limitaciones de tres tipos de muestreo aplicados en un mismo lote. Con el objeto de dar cuenta de las actividades de talla llevadas a cabo en el sitio, se presentan los resultados del análisis técnico-morfológico llevado a cabo sobre una muestra de desechos de talla (n= 300) extraída de un lote mayor (N= 2377)..This paper explores the incorporation of sampling techniques in lithic débitage analysis. The overall objective is to obtain samples representative of the entire set from which they originated, in this case, débitage recovered from layer 2 from Penas de la Cruz 1.1 site in Antofagasta de la Sierra, Catamarca. In order to accomplish this goal, the limitations of three types of sampling applied to the same lot were evaluated. With the goal of revealing the lithic production activities carried out at the site, the results of the technological analysis of a sample of materials (n= 300) collected from a larger lot (N= 2377) are presented.Fil: Funes Coronel, Jorge Alejandro. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Estudios Sociales. Universidad Nacional de Tucumán. Instituto Superior de Estudios Sociales; Argentin
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
Fig. 1. A in Integrity of fluvial fish communities is subject to environmental gradients in mountain streams, Sierra de Aroa, north Caribbean coast, Venezuela
No full textFig. 1. A: The Aroa River basin. The Yurubí National Park (YNP) is indicated by the shaded polygon. B: each circle indicates one or more sample localities. The white circles denoted tributaries in group 1 (G1) and black circles are tributaries in group 2 (G2).Published as part of Rodríguez-Olarte, Douglas, Amaro, Ahyran, Coronel, Jorge & Taphorn B, Donald C., 2006, Integrity of fluvial fish communities is subject to environmental gradients in mountain streams, Sierra de Aroa, north Caribbean coast, Venezuela, pp. 319-328 in Neotropical Ichthyology 4 (3) on page 321, DOI: 10.1590/S1679-62252006000300003, http://zenodo.org/record/541875
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
Caracterización de una cantera-taller en el curso medio del río Ilanco: secuencias de producción lítica durante el Holoceno medio inicial
Get PDFEste trabajo aporta nueva información al corpus de datos ya existentes sobre la distribución espacial de fuentes de materias primas líticas aptas para la talla dentro de la microrregión de Antofagasta de la Sierra (Provincia de Catamarca), Puna meridional argentina. Presentamos la caracterización general de una extensa cantera-taller de basalto detectada en el curso medio del río Ilanco (ca.3650 msnm), cuyo hallazgo en 1999 resultó de trabajos de prospección realizados en este sector, donde también fue registrado el sitio Peñas de la Cruz 1.1 (PCz1.1), el cual cuenta con evidencias arqueológicas datadas hacia el Holoceno medio inicial entre ca.7900-7200 AP (Martínez 2005). Independientemente de las características y de los cambios en las estrategias tecnológicas implementadas a lo largo del Holoceno, las fuentes de aprovisionamiento de rocas en Antofagasta de la Sierra se caracterizan por su ubicuidad espacial, lo cual conformó un conjunto de opciones para la selección y utilización de recursos líticos por los grupos humanos del pasado (Aschero et al 2002-2004).Fil: Funes Coronel, Jorge Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Estudios Sociales. Universidad Nacional de Tucumán. Instituto Superior de Estudios Sociales; ArgentinaFil: Martinez, Jorge Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Estudios Sociales. Universidad Nacional de Tucumán. Instituto Superior de Estudios Sociales; ArgentinaTaller de Arqueología del NOA: "Poblaciones humanas y ambientes durante el Holoceno medio"CórdobaArgentinaUniversidad Nacional de Córdob
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
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