1,720,977 research outputs found
Análisis de restos actualísticos de una población relictual de Lama guanicoe del Chaco Árido (Córdoba, Argentina). Una contribución interdisciplinaria para la conservación local de la especie
Full text linkFil: Costa, Thiago. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Antropología de Córdoba; Argentina.Fil: Costa, Thiago. Universidad Nacional de Córdoba. Facultad de Filosofía y Humanidades. Museo de Antropología; Argentina.Fil: Barri, Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Diversidad y Ecología Animal; Argentina.Fil: Barri, Fernando. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Izeta, Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Antropología de Córdoba; Argentina.Fil: Izeta, Andrés. Universidad Nacional de Córdoba. Facultad de Filosofía y Humanidades. Museo de Antropología; Argentina.Fil: Nores, Rodrigo. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Antropología de Córdoba; Argentina.Fil: Nores, Rodrigo. Universidad Nacional de Córdoba. Facultad de Filosofía y Humanidades. Museo de Antropología; Argentina.Fil: Castro, Lucila. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Antropología de Córdoba; Argentina.Fil: Castro, Lucila. Universidad Nacional de Córdoba. Facultad de Filosofía y Humanidades. Museo de Antropología; Argentina.Fil: Weihmuller, María Paula. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Antropología de Córdoba; Argentina.Fil: Weihmuller, María Paula. Universidad Nacional de Córdoba. Facultad de Filosofía y Humanidades. Museo de Antropología; Argentina.Fil: Weihmuller, María Paula. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Diversidad y Ecología Animal; Argentina.En la ecorregión del Gran Chaco los guanacos han desaparecido casi por completo. Sin embargo, existe una población sobreviviente que se encuentra aislada en los matorrales cerca de las depresiones salinas del Noroeste de la provincia de Córdoba. En este trabajo 15 presentamos datos preliminares de esta población de guanacos en peligro de extinción local, utilizando un enfoque interdisciplinario en una muestra actualística.Fil: Costa, Thiago. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Antropología de Córdoba; Argentina.Fil: Costa, Thiago. Universidad Nacional de Córdoba. Facultad de Filosofía y Humanidades. Museo de Antropología; Argentina.Fil: Barri, Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Diversidad y Ecología Animal; Argentina.Fil: Barri, Fernando. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Izeta, Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Antropología de Córdoba; Argentina.Fil: Izeta, Andrés. Universidad Nacional de Córdoba. Facultad de Filosofía y Humanidades. Museo de Antropología; Argentina.Fil: Nores, Rodrigo. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Antropología de Córdoba; Argentina.Fil: Nores, Rodrigo. Universidad Nacional de Córdoba. Facultad de Filosofía y Humanidades. Museo de Antropología; Argentina.Fil: Castro, Lucila. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Antropología de Córdoba; Argentina.Fil: Castro, Lucila. Universidad Nacional de Córdoba. Facultad de Filosofía y Humanidades. Museo de Antropología; Argentina.Fil: Weihmuller, María Paula. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Antropología de Córdoba; Argentina.Fil: Weihmuller, María Paula. Universidad Nacional de Córdoba. Facultad de Filosofía y Humanidades. Museo de Antropología; Argentina.Fil: Weihmuller, María Paula. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Diversidad y Ecología Animal; Argentina.Arqueologí
Trends and conservation status of South America mammals
Full text linkFil: Castro, Lucila. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Diversidad y Ecología Animal; Argentina.Fil: Barri, Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Diversidad y Ecología Animal; Argentina.Fil: Steffolan, Laura. Pacific Biodiversity Institute; Argentina.Fil: Ceballos, Gerardo. Universidad Nacional Autónoma de México. Instituto de Ecología; México.Our planet is undergoing the sixth mass extinction of species. The accelerated change in land use coupled with other threats to biodiversity, has led to a worrying process of defaunation. For this reason, it is necessary to know the current state of those groups and species that are at greater risk of extinction or that require studies, in order to take urgent conservation measures, particularly in regions such as South America, where the loss of natural habitats is alarming. We assess the population trends and conservation status of South American mammals. We used the IUCN databases for 1197 species. Analyses were carried out at the species and order level. The results in terms of population trend indicate that of the total analysed, almost 30% are declining, and less than 1% are increasing, while there was no information of 46% of the species. The orders with most critical declining species are Carnivora, Primates, Chiroptera, Rodentia and Cetartiodactyla. In relation to the IUCN conservation status, analyses indicate that 16% of the species are under some category of risk. For example, of 44 species of carnivores, 9 have some category of danger; in the case of the primates, of the 130 species 57 are in some category of danger. This analysis shows that a third of the mammals in South America are at risk of disappearing. This percentage is likely to be higher if one takes into account that there is no information on population trends of nearly half of the species.Fil: Castro, Lucila. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Diversidad y Ecología Animal; Argentina.Fil: Barri, Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Diversidad y Ecología Animal; Argentina.Fil: Steffolan, Laura. Pacific Biodiversity Institute; Argentina.Fil: Ceballos, Gerardo. Universidad Nacional Autónoma de México. Instituto de Ecología; México.Conservación de la Biodiversida
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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