1,720,957 research outputs found
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
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
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
Environmental characterization of the cienaga de la quinta located in Cartagena, Colombia, 2009 – 2010
Get PDFCartagena de Indias posee diversidad de ecosistemas marinos, los cuales, la convierten en una importante ciudad de Colombia. La Ciénaga de la Quinta es uno de los cuerpos de agua que conforma el sistema hídrico marino lagunar de esta capital caribeña; tiene su propia dinámica hídrica hacia el mercado de Bazurto, con una velocidad de, aproximadamente, 0,06m/s, la que es muy baja para dispersar contaminantes. Este cuerpo de agua ha actuado como receptor de disposición final de los residuos del mercado de Bazurto, por lo que, en la actualidad, es evidente su sedimentación y su contaminación por residuos sólidos y líquidos. De igual manera, existe generación de olores ofensivos, vectores y una grave problemática social en torno a éste. La caracterización ambiental del ecosistema, se realizó a través de un estudio exploratorio, utilizando indicadores fisicoquímicos, microbiológicos para las aguas, clasificación de estratos edáficos y cuantificación de metales pesados. Es de resaltar que las concentraciones del oxígeno disuelto, coliformes fecales, materia orgánica y metales pesados, afectan la calidad del agua y sobrepasan los límites admisibles para preservación de flora y fauna en aguas marinas. Así mismo, las condiciones de humedad natural y los contenidos de material orgánica del suelo fueron elevados, generando situación de compresibilidad, evidencias de rellenos y capas de mangle en descomposición.Cartagena de Indias shows a diversity of marine ecosystems, that turns it into an significant town in Colombia. The marsh “la Quinta” is one of the water bodies comprising the ocean water lagoon system of Cartagena, having its own hydric dynamics toward the “Bazurto” market, with a speed of approximately 0.06m/s, rate which is very low to disperse pollutants. This water body has acted as a final disposal of waste coming from the Bazurto market, therefore sedimentation and pollution from solid and liquid waste is actually evident. Equally it generates offensive odors, vectors and causes serious social problems in its surroundings. The environmental characterization of this ecosystem was carried out through an exploratory study, using physical-chemical indicators, microbiological ones for water characterization, classification of soil strata and quantification of heavy metals. It is notable to highlight that the concentrations of dissolved oxygen, fecal coliforms, organic matter and heavy metals, affect the water quality and exceeds the permitted limits acceptable for the preservation of flora and fauna in marine waters. Also the conditions of natural moisture and soil organic material content are elevated, generating compressible situation, evidence of land fillings and layers of decaying mangrove.Incluye referencias bibliográfica
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
Environmental characterization of the cienaga de la quinta located in Cartagena, Colombia, 2009 – 2010
No full textCartagena de Indias posee diversidad de ecosistemas marinos, los cuales, la convierten en una importante ciudad de Colombia. La Ciénaga de la Quinta es uno de los cuerpos de agua que conforma el sistema hídrico marino lagunar de esta capital caribeña; tiene su propia dinámica hídrica hacia el mercado de Bazurto, con una velocidad de, aproximadamente, 0,06m/s, la que es muy baja para dispersar contaminantes. Este cuerpo de agua ha actuado como receptor de disposición final de los residuos del mercado de Bazurto, por lo que, en la actualidad, es evidente su sedimentación y su contaminación por residuos sólidos y líquidos. De igual manera, existe generación de olores ofensivos, vectores y una grave problemática social en torno a éste. La caracterización ambiental del ecosistema, se realizó a través de un estudio exploratorio, utilizando indicadores fisicoquímicos, microbiológicos para las aguas, clasificación de estratos edáficos y cuantificación de metales pesados. Es de resaltar que las concentraciones del oxígeno disuelto, coliformes fecales, materia orgánica y metales pesados, afectan la calidad del agua y sobrepasan los límites admisibles para preservación de flora y fauna en aguas marinas. Así mismo, las condiciones de humedad natural y los contenidos de material orgánica del suelo fueron elevados, generando situación de compresibilidad, evidencias de rellenos y capas de mangle en descomposición.Cartagena de Indias shows a diversity of marine ecosystems, that turns it into an significant town in Colombia. The marsh “la Quinta” is one of the water bodies comprising the ocean water lagoon system of Cartagena, having its own hydric dynamics toward the “Bazurto” market, with a speed of approximately 0.06m/s, rate which is very low to disperse pollutants. This water body has acted as a final disposal of waste coming from the Bazurto market, therefore sedimentation and pollution from solid and liquid waste is actually evident. Equally it generates offensive odors, vectors and causes serious social problems in its surroundings. The environmental characterization of this ecosystem was carried out through an exploratory study, using physical-chemical indicators, microbiological ones for water characterization, classification of soil strata and quantification of heavy metals. It is notable to highlight that the concentrations of dissolved oxygen, fecal coliforms, organic matter and heavy metals, affect the water quality and exceeds the permitted limits acceptable for the preservation of flora and fauna in marine waters. Also the conditions of natural moisture and soil organic material content are elevated, generating compressible situation, evidence of land fillings and layers of decaying mangrove.Incluye referencias bibliográfica
Caracterización ambiental de la Ciénaga de la Quinta localizada en Cartagena de Indias, Colombia, 2009 - 2010
Get PDFCartagena de Indias shows a diversity of marine ecosystems, that turns it into an significant town in Colombia. The marsh "la Quinta" is one of the water bodies comprising the ocean water lagoon system of Cartagena, having its own hydric dynamics toward the "Bazurto" market, with a speed of approximately 0.06m/s, rate which is very low to disperse pollutants. This water body has acted as a final disposal of waste coming from the Bazurto market, therefore sedimentation and pollution from solid and liquid waste is actually evident. Equally it generates offensive odors, vectors and causes serious social problems in its surroundings. The environmental characterization of this ecosystem was carried out through an exploratory study, using physical-chemical indicators, microbiological ones for water characterization, classification of soil strata and quantification of heavy metals. It is notable to highlight that the concentrations of dissolved oxygen, fecal coliforms, organic matter and heavy metals, affect the water quality and exceeds the permitted limits acceptable for the preservation of flora and fauna in marine waters. Also the conditions of natural moisture and soil organic material content are elevated, generating compressible situation, evidence of land fillings and layers of decaying mangrove.Cartagena de Indias posee diversidad de ecosistemas marinos, los cuales, la convierten en una importante ciudad de Colombia. La Ciénaga de la Quinta es uno de los cuerpos de agua que conforma el sistema hídrico marino lagunar de esta capital caribeña; tiene su propia dinámica hídrica hacia el mercado de Bazurto, con una velocidad de, aproximadamente, 0,06m/s, la que es muy baja para dispersar contaminantes. Este cuerpo de agua ha actuado como receptor de disposición final de los residuos del mercado de Bazurto, por lo que, en la actualidad, es evidente su sedimentación y su contaminación por residuos sólidos y líquidos. De igual manera, existe generación de olores ofensivos, vectores y una grave problemática social en torno a éste. La caracterización ambiental del ecosistema, se realizó a través de un estudio exploratorio, utilizando indicadores fisicoquímicos, microbiológicos para las aguas, clasificación de estratos edáficos y cuantificación de metales pesados. Es de resaltar que las concentraciones del oxígeno disuelto, coliformes fecales, materia orgánica y metales pesados, afectan la calidad del agua y sobrepasan los límites admisibles para preservación de flora y fauna en aguas marinas. Así mismo, las condiciones de humedad natural y los contenidos de material orgánica del suelo fueron elevados, generando situación de compresibilidad, evidencias de rellenos y capas de mangle en descomposición
- …
