1,720,956 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
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
Linfoma óseo primario
Get PDFEl linfoma primario de hueso es definido histológicamente como un linfoma extra ganglionar, afecta los huesos y puede ser desarrollado por una enfermedad sistémica. Se presentó un caso de linfoma óseo primario en el Hospital General Docente “Ernesto Guevara de la Serna” de las Tunas en el año 2013, descrito como una forma muy rara de manifestación de los linfomas. Paciente masculino de 72 años de edad, con dolor a nivel del calcáneo derecho, inflamación e impotencia funcional. Se realizaron estudios imaginológicos que revelaron la existencia de osteoporosis y un tumor óseo primario de tipo linfomatos
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Utilidad de la ecografía en pacientes con enfermedad nodular tiroidea atendidos en un hospital general
Get PDFBackground: the main role of thyroid ultrasonography lies in its usefulness for the morphological characterization of thyroid nodules.Objective: to characterize sonographically the patients with thyroid nodules treated at the "Dr. Ernesto Guevara de la Serna" General Teaching Hospital of Las Tunas, from May 2017 to July 2018.Methods: a descriptive and prospective observational study was carried out in patients with a diagnosis of nodular thyroid disease, treated at the hospital and during the period of time declared in the objective. The sample consisted of 51 of these patients, older than 19 years, studied by ultrasound and with the result of TI-RADS 3-5, who were subsequently studied with fine-needle aspiration cytology (FNAC).Results: nodular thyroid disease predominated in female patients (94 %), more frequent in the 46 to 55 age group (29 %). In the benign nodules, all with TI-RADS 3, the ultrasonographic signs that persisted were: predominantly cystic mixed internal content, complex echogenicity, thin halo, defined and regular margins, peripheral flow pattern and the size was wider than high. In the malignant nodules predominated: solid internal content, hypoechogenicity, absence of halo, ill-defined margins, microcalcification, the central flow pattern and the size was larger than wide. The FNAC showed that 72 % of the studied patients with TIRADS had benign nodular lesions and 27 % malignant lesions.Conclusions: patients with thyroid nodules included in the study were sonographically characterized.Fundamento: el papel fundamental de la ecografía tiroidea reside en su utilidad para la caracterización morfológica de los nódulos de tiroides.Objetivos: caracterizar ecográficamente a los pacientes con nódulos tiroideos atendidos en el Hospital General Docente “Dr. Ernesto Guevara de la Serna” de Las Tunas, de mayo 2017 a julio 2018.Métodos: se realizó un estudio observacional descriptivo y prospectivo en pacientes con diagnóstico de enfermedad nodular tiroidea, atendidos en el hospital y durante el período de tiempo declarados en el objetivo. La muestra la conformaron 51 de estos pacientes, mayores de 19 años, estudiados por ultrasonido y con resultado de TI-RADS 3-5, que posteriormente se les haya realizado citología por aspiración con aguja fina (CAAF).Resultados: la enfermedad nodular del tiroides predominó en pacientes del sexo femenino (94 %), más frecuente en el grupo de 46-55 años (29 %). En los nódulos benignos, todos con TI-RADS 3, los signos ultrasonográficos que persistieron fueron: contenido interno mixto predominantemente quístico, ecogenicidad compleja, halo delgado, márgenes definidos y regulares, el patrón de flujo periférico y tamaño más ancho que alto. En los malignos predominaron: el contenido interno sólido, la hipoecogenicidad, ausencia de halo, márgenes mal definidos, las microcalcificaciones, el patrón de flujo central y el tamaño más alto que ancho. La CAAF evidenció que el 72 % de los pacientes estudiados con el TIRADS tenían lesiones nodulares benignas y el 27 % malignas.Conclusiones: se caracterizaron ecográficamente los pacientes con nódulos tiroideos incluidos en el estudio
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