1,720,992 research outputs found
Informe sobre fluoruración de la sal
No full textEn el año 2006, la Organización Mundial de la Salud, la Federación Dental Internacional y la Asociación Internacional para la Investigación Dental convocaron a 80 expertos de 30 países a una Consulta Global sobre la Salud Bucodental mediante el Fluoruro. Las recomendaciones plantearon, entre otras, la necesidad que los gobiernos y a otros organismos introduzcan legislación efectiva y los programas necesarios para asegurar el acceso al fluoruro para la salud dental en todos los países.Fil: Piovano, S. Universidad de Buenos Aires. Facultad de Odontología. Cátedra de Odontología Preventiva y Comunitaria. Buenos Aires, Argentina.Fil: Bordoni, N. Universidad de Buenos Aires. Facultad de Odontología. Cátedra de Odontología Preventiva y Comunitaria. Buenos Aires, Argentina
Factores y nivel de riesgo de las enfermedades producidas por el biofilm de placa: primera parte
No full textLas investigaciones de las dos últimas décadas indican que los paradigmas de diagnóstico y tratamiento de las enfermedades asociadas al biofilm de placa son significativamente diferentes y tienden a seguir los lineamientos de los preceptos del modelo médico. Los adelantos biológicos y epidemiológicos permiten identificar a los pacientes expuestos a alto riesgo, vulnerables a contraer una enfermedad. La evaluación de un solo factor no permite ponderar el riesgo, pero se pueden identificar un conjunto de factores indicativos de un mayor riesgo de enfermedad para un individuo determinado o grupo de personas. La importancia de aplicar la distribución de riesgo apunta a comprender que el éxito dependerá de las acciones previas referidas al manejo de caries dental y enfermedad gingivoperiodontal como enfermedades infecciosas multifactoriales. El objetivo de este trabajo fue analizar factores de riesgo para arribar al diagnóstico en Cariología y Periodoncia.Fil: Piovano, S. Universidad de Buenos Aires. Facultad de Odontología. Cátedra de Odontología Preventiva y Comunitaria. Buenos Aires, Argentina
Factores y nivel de riesgo de las enfermedades producidas por el biofilm de placa. Segunda parte: medidas preventivas
No full textLa incorporación de los preceptos del modelo médico y médico social aplicados a la atención odontológica ha permitido revisar los métodos de prevención y tratamiento de las enfermedades asociadas al biofilm de placa.\nEn los últimos 50 años se han puesto en marcha estrategias individuales y comunitarias de prevención de caries dental; el hallazgo más notable ha sido la fluoración de las aguas de abastecimiento y la incorporación de dentífricos fluorados.\nLas estrategias preventivas en cariología han resultado más eficaces cuando han sido aplicadas en forma combinada y se han desarrollado nuevas estrategias de tratamiento con el avance en el conocimiento de la etiología de las diferentes formas clínicas de Enfermedad Periodontal.\nFil: Piovano, S. Universidad de Buenos Aires. Facultad de Odontología. Cátedra de Odontología Preventiva y Comunitaria. Buenos Aires, Argentina
Seasonal changes in size, sex-ratio and body condition of the damselfish Chromis chromis in the central Mediterranean Sea
Full text linkChromis chromis is one of the most abundant fish species on the Mediterranean rocky shores. Acting as a by-pass of nutrients from the pelagic to the rocky littoral system, it plays an important role as a resource provider and has a relevant function in
the community assemblage. Chromis chromis has many of the characteristics required of an indicator species (e.g. it is easy to recognize in the field, small sized, widespread and abundant). In this study we focused on individual size, sex-ratio and body condition in a damselfish population occurring in a central Mediterranean marine protected area. Fishing trials on a monthly
basis (April–November) allowed us to assess seasonal changes in population structure. Fish were measured and weighed and a subsample was aged and sexed. On average, males were larger than females. The allometric coefficient, b, for the whole population was 2.99; the maximum age recorded was 7.5 yr. Before reproduction sex-ratio was close to parity (M:F 1:0.78), while a larger proportion of females was captured during the reproductive period. In conclusion, our results show that the population dynamics of C. chromis is influenced by both sex and size. Since males and females have different behavioural strategies, and since the length of the spawning period is shorter in the smaller than in the larger-sized individuals, this
is reflected in temporal changes observed in the population structure
Caratterizzazione bio-ecologica delle popolazioni vegetali, gruppi funzionali e loro ruolo strutturale e dinamico nelle fitocenosi pascolive e forestali.
No full text
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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