1,720,955 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
Prescripción de lente de contacto en niños de Las Tunas
Get PDFBackground: the use of contact lenses has increased worldwide. Nowadays its use is not only restricted to optical correction, but also to therapeutic purposes because they favor comfort and esthetics in multiple eye disorders.Objective: to describe the results of the prescription of contact lenses in children, in the period from January to March 2016.Methods: a cross-sectional descriptive study was carried out with candidates to wear contact lenses who presented to the contact lenses service at “Mártires de Las Tunas” Provincial Children Hospital, in the province of Las Tunas, from January to March 2016. The universe and sample included 15 pediatric patients.Results: 25 eyes were treated and the female sex represented 80 %. The 7 to 12 age group was the commonest one. Astigmatism was the most frequent disorder with 56 %. The contact lenses mostly ordered were the rigid-type ones. All the studied eyes significantly improved visual acuity with contact lenses.Conclusions: there was a prevalence of astigmatism as a refractive defect in the contact lens patients who presented to the service. All the patients (25 eyes) who received contact lens testing improved their eyesight between 0.6 and 1.0. Rigid lenses were the most prescribed ones.Fundamento:el empleo de lentes de contacto se ha incrementado a nivel mundial; en la actualidad su uso no se restringe solamente a la corrección óptica, sino que se utilizan con fines terapéuticos, ya que generan comodidad y estética en múltiples afecciones oculares.Objetivo: describir los resultados de la prescripción de lentes de contacto en niños de edad pediátrica, atendidos en el Hospital Pediátrico Provincial “Mártires de Las Tunas”, provincia de Las Tunas, en el periodo comprendido de enero a marzo de 2016.Métodos: se realizó un estudio descriptivo transversal con los niños candidatos a usar lentes de contacto, que acudieron a la consulta en el referido hospital y durante el período de tiempo ya declarado. El universo quedó conformado por 15 pacientes de edad pediátrica.Resultados: se trataron 25 ojos y el género femenino representó el 80 %. La edad más común fue entre 7 y 12 años y el astigmatismo fue el defecto más frecuente, con el 56 %. Los lentes de contacto más indicados fueron los rígidos; todos los ojos estudiados mejoraron considerablemente la agudeza visual con lentes de contacto.Conclusiones: se describieron los resultados de la prescripción de lente de contacto en niños de Las Tunas. Todos los pacientes tratados mejoraron entre 0,6 y 1,0 su visión. Los lentes rígidos resultaron ser los más indicados
Conversión visual infantil por trastorno psicosocial
Get PDFThe loss of non-organic vision affects about 5 % of patients, and occurs in two forms: visual conversion disorder and simulation. The latter does not occur frequently in the pediatric age and if so, it is not intentional but due to possible psychosocial and psychiatric disorders. This study presents the case of a 9-year-old girl who was taken to the ophthalmology department of the Provincial Pediatric Hospital, complaining of blurred vision and pain in both eyes, accompanied by headache. Structural and functional tests were performed which did not show alterations to prove the condition. Through specific explorations of the visual function, simulation of children’s blindness caused by family psychosocial disorders was suspected. This diagnosis was made after a thorough family history taking. The girl recovered her vision.La pérdida de la visión no orgánica afecta a cerca del cinco por ciento de los pacientes y se presenta bajo dos formas: trastorno de conversión visual o simulación. Esta última no ocurre con frecuencia en la edad pediátrica y, de hacerlo, no es de forma intencionada, sino por posibles problemas psicosociales y psiquiátricos. Se expone el caso de una niña de nueve años que es llevada al cuerpo de guardia del servicio de Oftalmología del Hospital Pediátrico Provincial, refiriendo visión borrosa y dolor ocular en ambos ojos, además de cefalea. Se realizan pruebas estructurales y funcionales, que no mostraron alteraciones que justificaran la afectación. A través de exploraciones específicas de la función visual se llegó a sospechar de simulación de ceguera infantil por trastornos psicosociales familiares, que quedó diagnosticada luego de un minucioso interrogatorio familiar. La niña recuperó la visión
Corrección con lentes de contacto de la ambliopía refractiva en niños mayores de seis años
Get PDFBackground: vision plays a fundamental role in the physical and intellectual development of children. Correcting defects at an early age makes it possible to get better results in visual rehabilitation.Objective: to characterize the process of correction with contact lenses of refractive amblyopia in children older than six years, treated at the contact lens office of the "Mártires de Las Tunas" Provincial Pediatric Hospital of the province of Las Tunas, from January to September 2019.Methods: a descriptive cross-sectional study was carried out with 28 children, including 47 eyes that presented refractive amblyopia. All the patients visited the office during the period of time declared in the objective, referred by the ophthalmologist. The following variables were assessed: age, type of amblyopia, prevalence of ametropia, initial visual acuity, visual acuity with glasses and visual acuity with contact lenses.Results: the most common age was between 7 and 12 years. Astigmatism was the most frequent refractive defect, in 57 % of the cases. The most common refractive amblyopia was the mild one, 88 %. Most of the studied eyes (88 %) considerably improved visual acuity with contact lenses.Conclusions: the correction of refractive amblyopia with contact lenses was effective, to the same extent as the predominance of the mild degree of amblyopia.Fundamento: la visión tiene un papel fundamental en el desarrollo físico e intelectual del niño. La corrección de defectos en edades tempranas permite mejores resultados en la rehabilitación visual.Objetivo: caracterizar el proceso de corrección con lentes de contacto de la ambliopía refractiva en niños mayores de seis años, atendidos en la consulta de lentes de contacto del Hospital Pediátrico Provincial “Mártires de Las Tunas”, en la provincia de Las Tunas, de enero a septiembre de 2019.Métodos: se realizó un estudio descriptivo transversal en 28 niños y de ellos los 47 ojos que presentaban ambliopía refractiva. Todos acudieron a la consulta y durante el periodo de tiempo declarados en el objetivo, por remisión del oftalmólogo. Se evaluaron las variables: edad, tipo de ambliopía, prevalencia de ametropía, agudeza visual inicial, agudeza visual con cristales y agudeza visual con lentes de contacto.Resultados: la edad más común fue entre 7 y 12 años. El astigmatismo fue el defecto refractivo más frecuente, en el 57 % de los casos. La ambliopía refractiva más frecuente fue la leve, 88 %. La mayoría de los ojos estudiados (88 %) mejoraron considerablemente la agudeza visual con lentes de contacto.Conclusiones: la corrección de la ambliopía refractiva con lentes de contacto fue efectiva, en la misma medida del predominio del grado leve de ambliopía
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
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