1,720,983 research outputs found
Green obsidian in Tierra del Fuego and Patagonia : characterization, distribution and cultural issues during the Holocene
No full textLa obsidiana verde como materia prima utilizada por los grupos cazadores recolectores prehistóricos
de Fuego-Patagonia ha estado presente en la investigación macrorregional desde su descubrimiento arqueológico,
en la década de 1950. Se presenta una nueva síntesis crítica y actualizada de los estudios
en torno a esta materia prima volcánica y se discuten nuevos análisis geoquímicos, para comprender su
relación con aspectos culturales como aprovisionamiento, distribución y tecnología. La localización exacta
de la fuente de obtención es aún desconocida, pero indicadores arqueológicos y geológicos circunscriben
su ubicación al sector del mar de Otway e isla Riesco, región de Magallanes, Chile. Se evalúan aspectos
referidos a la distribución espacial y temporal del registro arqueológico de obsidiana verde, la presencia
de un lapso de discontinuidad en su utilización y la discusión de su relevancia como evidencia de interacción
cultural, entre grupos cazadores recolectores terrestres y marítimos, de oeste a este, y también
entre el norte y sur del estrecho de Magallanes.Fil: Morello, Flavia. Universidad de Magallanes; Chile.Fil: Stern, Charles. University of Colorado; Estados Unidos.Fil: San Román, Manuel. Universidad de Magallanes; Chile.Green obsidian as raw material used by prehistoric
hunter-gatherer groups of Fuego-Patagonia has been present in the macro-regional archaeological research
since its discovery in the 1950s. A new critical synthesis and updated studies for this volcanic rock are
presented and new geochemical analyses are discussed in order to understand their relation with cultural
issues such as sourcing, distribution and technology. The exact occurrence of the source is still unknown,
but archaeological and geological signs confine its location near Otway Sea and Riesco Island, Magallanes
Region, Chile. We have evaluated aspects related to the spatial and temporal archaeological record’s
distribution of green obsidian, to the discontinuity in its use and arguments of its relevance as evidence
of cultural interaction between land and sea hunter-gatherers, from West to East and also between the
North and South of the Strait of Magellan
Procesamiento alimenticio y tecnológico de guanacos (Lama guanicoe) durante el Holoceno tardío : el caso del sitio costero Marazzi 32 (Tierra del Fuego, Chile)
No full textPresentamos el análisis del conjunto de guanacos provenientes del sitio arqueológico Marazzi 32, Isla Grande de Tierra del Fuego. El yacimiento, con dataciones entre 560-635 años AP, destaca por un registro óseo de cetáceos, mayoritariamente localizados en superficie, y la predominancia de guanaco en relación con otros mamíferos marinos, aves y otras especies. Los resultados permitieron confirmar la importancia de los restos de guanaco en la subsistencia y en el aprovisionamiento de materias primas óseas, lo que apoya la teoría económica que tradicionalmente ha considerado que los recursos terrestres jugaron un rol fundamental para los grupos humanos durante el Holoceno tardío. Se discute el interés de la explotación de guanacos en el sitio, el aprovechamiento mayoritario de individuos juveniles y las estrategias de explotación, cadena alimentaria y la gestión tecnológica de la especie.Fil: Sierpe, Víctor. Universidad de Tarapacá. Universidad de Magallanes. Instituto de la Patagonia; Chile.Fil: Morello, Flavia. Universidad de Magallanes. Instituto de la Patagonia; Chile.Fil: Massone, Mauricio. Universidad de Magallanes. Instituto de la Patagonia; Chile.Fil: Palacio, Cristóbal. Universidad de Magallanes. Instituto de la Patagonia; Chile.ALIMENTARY AND TECHNOLOGICAL PROCESSING OF GUANACOS (LAMA GUANICOE) DURING THE LATE HOLOCENE: THE CASE OF COASTAL SITE MARAZZI 32 (TIERRA DEL FUEGO, CHILE). The analysis of the guanaco assemblage recovered from Marazzi 32 archaeological site, Isla Grande de Tierra del Fuego, is presented. The site, dated between 560 and 635 BP, is noteworthy for its record of cetacean bones, mostly found on the surface, and the prevalence of guanacos in relation to other marine mammals, birds and taxa. Results confirmed the importance of guanaco remains in the subsistence and supply of bone raw material, supporting the economic theory that has traditionally considered that land resources played a fundamental role for human groups during the late Holocene. The significance of guanaco ex-ploitation at the site, the greater number of young individuals, and the exploitation strategies, food chain, and technological management of the species are discussed
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
The Cave at the End of the World: Cueva del Medio and the Early Colonization of Southern South America
No full textA discussion of the previous dstinction of two early archaeological components at Cueva del Medio is presented. Our evidence suggest that such a distinction do not hold. We use a number of lines of evidence to support our argument, including the taxonomy of associated animal remains, the chronology and the stratigraphy.Fil: Martin, Fabiana M.. Universidad de Magallanes; ChileFil: Todisco, Dominique. No especifíca;Fil: Rodel, Joet. No especifíca;Fil: Prevosti, Francisco Juan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja. - Universidad Nacional de La Rioja. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja. - Universidad Nacional de Catamarca. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja. - Secretaría de Industria y Minería. Servicio Geológico Minero Argentino. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja. - Provincia de La Rioja. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja; ArgentinaFil: San Román, Manuel. Universidad de Magallanes; ChileFil: Morello, Flavia. Universidad de Magallanes; ChileFil: Borrero, Luis Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Saavedra 15. Instituto Multidisciplinario de Historia y Ciencias Humanas; Argentin
Land of the ground sloths: Recent research at Cueva Chica, Ultima Esperanza, Chile
Full text linkUltima Esperanza is a region known worldwide, where some of the best preserved remains of latePleistocene ground sloths were found. Cueva del Milodón produced a large piece of Mylodon darwini skin in 1895 as well as extensive deposits of ground sloth dung that were sampled several times during the 20th Century. These deposits are dated within 13,500 and 10,200 radiocarbon years. At Cueva del Medio, not far from Cueva del Milodón, evidence of human exploitation of extinct fauna was discovered. Also, at nearby Dos Herraduras rockshelter, several ground sloth elements were found within a tephra layer regionally dated ca. 12,600 BP. This paper presents new data derived from stratigraphic work at Cueva Chica, a site located near Cueva del Milodón, which in spite of its obvious potential was not studied previously. The work revealed more than one layer of Late Pleistocene fauna, where remains of ground sloth, a large felid and other species were preserved. Radiocarbon studies produced some of the oldest evidence for the presence of Mylodon sp. in the region. The integration of these results within the context of the paleoecology of Late Pleistocene Ultima Esperanza is presented.Fil: Martin, Fabiana Maria. Instituto de la Patagonia. Centro de Estudios del Hombre Austral; ChileFil: San Román, Manuel. Instituto de la Patagonia. Centro de Estudios del Hombre Austral; ChileFil: Morello, Flavia. Instituto de la Patagonia. Centro de Estudios del Hombre Austral; ChileFil: Todisco, Dominique. Université de Rouen; FranciaFil: Prevosti, Francisco Juan. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales; ArgentinaFil: Borrero, Luis Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Saavedra 15. Instituto Multidisciplinario de Historia y Ciencias Humanas; Argentin
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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