1,721,028 research outputs found
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
Enteric fever in a UK regional infectious diseases unit: a 10 year retrospective review
No full textEnteric fever is an increasingly common diagnosis in returning travellers in the UK.METHODS: We performed a retrospective descriptive study of culture-confirmed cases of enteric fever admitted to University Hospitals Leicester, UK between January 1999 and April 2009.RESULTS: 100 cases of enteric fever were identified in adults (n = 76) and children (n = 24). The median age of adult subjects was 38 (range 18-71) and 55% were male. Of the 61 adult cases with notes available, 60 (98.3%) were of Asian ethnicity and 56 (92%) had a recent travel history, principally to the Indian Subcontinent. Symptoms included fever (100%), headache (62%), diarrhoea (59%) and abdominal pain (44%). Common examination findings included pyrexia and mild generalized abdominal tenderness. Mild hyponatraemia, transaminitis and a normal white cell count were commonly identified. Reduced ciprofloxacin sensitivity was common and increased over the study period. Median fever clearance time was 6 days, and treatment failure occurred in 20% of cases. Relapse occurred in 2 patients. Complications were unusual, and one patient died.DISCUSSION: Patients with enteric fever presented with a non-specific febrile illness within one month after returning from travel, and most had an uncomplicated clinical course. Increasing ciprofloxacin insensitivity was the likely explanation for a high treatment failure rate and this agent can no longer recommended as empirical treatment.<br/
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
Optimización De La Síntesis De Un Mecanismo De 6 Barras Stephenson I Para Una Protesis De Rodilla Mediante Algoritmos Genéticos Y Matlab
No full textThis paper entitled "Optimization of the synthesis of a 6-bar Stephenson I mechanism for a knee prosthesis using genetic algorithms and Matlab grip", was developed using the method of genetic algorithms to design of articulated four bar mechanisms applied to this system of six bars.
To optimize the mechanism five corresponding prescribed positions defined five positions of the femur, of these positions ten points precision five belonging to the mechanism 1, and five belonging to the mechanism 2.
Stephenson I, mechanism was taken as the composition of two mechanisms articulated four separate bars each other, thus applying the programming code optimization synthesis by genetic algorithms for four-bar linkage developed in Matlab, each; with a randomly created population, based on the domain of each variable (length of the links and angle of movement) of eight thousand individuals, and encoded (binary system), intended to facilitate the use of genetic operators (selection, crossover and mutation), the development of a function based on Freudenstein equations for the evaluation of individuals; with a stop condition for a maximum of a thousand generations or an error of 0.001; then attach these mechanisms thus obtaining the desired Stephenson I mechanism.
The optimization method of synthesis by genetic algorithms applied to the generation of movement for five positions of coupling points of a Stephenson I mechanism, allowed to find the representative lengths of the links of a knee prosthesis, with an error of 0.001, was finally carried out the design and simulation of mechanism obtained by Geogebra Software where it was found that the mechanism achieves a position in the prescribed points.El presente trabajo titulado “Optimización de la síntesis de un mecanismo de 6 barras Stephenson I para una prótesis de rodilla mediante algoritmos genéticos y Matlab”, se desarrolló utilizando el método de algoritmos genéticos, para el diseño de mecanismos articulados de cuatros barras, aplicado a este sistema de seis barras.
Para optimizar el mecanismo se definió cinco posiciones prescritas correspondientes a cinco posiciones del fémur, de estas posiciones se tomaron diez puntos de precisión, cinco pertenecientes al mecanismo 1, y los otros cinco pertenecientes al mecanismo 2.
El mecanismo Stephenson I, se tomó como la composición de dos mecanismos articulados de cuatro barras independientes entre sí, aplicando así el código de programación de optimización de síntesis por algoritmos genéticos para mecanismos de cuatro barras desarrollado en Matlab, a cada uno; con una población creada aleatoriamente, en base al dominio de cada variable (longitud de los eslabones y ángulo de movimiento) de diez mil individuos, y codificada (sistema binario), con la intención que facilite el uso de los operadores genéticos (selección, cruce y mutación), la elaboración de una función en base a las ecuaciones de Freudenstein para la evaluación de los individuos; con una condición de paro para un máximo número de mil generaciones o un error de 0.001; para luego acoplar dichos mecanismos obteniendo así el mecanismo Stephenson I deseado.
El método de optimización de síntesis por algoritmos genéticos, aplicado a la generación de movimiento para cinco posiciones de los puntos del eslabón acoplador de un mecanismo Stephenson I, permitió encontrar las longitudes representativas de los eslabones de una prótesis de rodilla, con un error de 0.001, finalmente se llevó a cabo el diseño y simulación del mecanismo obtenido mediante el Software Geogebra donde se comprobó que el mecanismo logra posicionarse en los puntos prescritos.Tesi
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
- …
