1,721,027 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
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
Retinopatia associada ao uso de inibidor de Mek : um relato de caso
Full text linkCom o advento de novas terapias antineoplásicas, observam-se hoje efeitos adversos oftalmológicos até então pouco descritos. O Trabalho abaixo descreve um relato de caso de um paciente em tratamento de uma neoplasia metastática apresentando baixa visual leve e achados retinianos até então pouco descritos na literatura, bem como uma revisão bibliográfica de casos semelhantes
Estudo longitudinal para avaliação de alterações precoces da retina e coroide de pacientes com diabetes mellitus tipo 2 associada à doença renal diabética
Full text linkObjetivo: Avaliar a tendência de alterações estruturais precoces em retina e coroide de pacientes com Diabetes Mellitus tipo 2 (T2D) e sua associação com doença renal diabética (DKD). Métodos: Estudo longitudinal prospectivo com 3 anos de seguimento. Pacientes com T2D sem retinopatia diabética (RD) ou com RD leve foram divididos de acordo com o status de função renal em grupos com e sem DKD. Danos neurodegenerativos e vasculares foram avaliados através da medida de camadas da retina e coroide, usando tecnologia Swept-Source OCT (SS-OCT). Avaliação de densidade vascular foi feita simultaneamente com uso de angiografia por OCT (OCT-A). Os parâmetros estruturais foram analisados no início do estudo (análise transversal com grupo controle saudável comparador), e prospectivamente durante o período de acompanhamento. Resultados: A análise do início do estudo mostrou diferença significativa entre o grupo DKD e controle para os seguintes parâmetros: afinamento de camada de células ganglionares (GCL+), camada de fibras nervosas circumpapilar (cRNFL) e retina central (CRT), diminuição da densidade vascular superficial da retina, aumento da zona avascular foveal (FAZ), diminuição da espessura da coroide, sem diferença de densidade vascular da coriocapilar (CC). A análise longitudinal foi feita com o acompanhamento de 160 olhos de 80 diabéticos, sendo 88 olhos no grupo DKD e 72 sem DKD. Os grupos não apresentaram diferença significativa entre parâmetros estruturais ao início do estudo. O grupo que iniciou sem DKD apresentou piora significativa de controle glicêmico e taxa de filtração glomerular estimada (eGRF) ao longo do tempo. Concomitantemente, observou-se nesse grupo significativo afinamento em GCL+, coroide subfoveal, diminuição da densidade vascular do plexo superficial da retina com aumento de FAZ (também observada no grupo DKD) e perda de densidade vascular nos quadrantes nasal e temporal da CC em relação aos resultados de início do estudo. Conclusões: Em conclusão, nossos dados demonstraram progressão de danos precoces neurovasculares em olhos de pacientes com T2D sem RD ou com RD leve. Os achados sugerem uma possível associação entre piora do controle glicêmico e parâmetros renais com aumento na tendência de dano neurovascular em pacientes que não apresentavam DKD no início do estudo.Purpose: To evaluate the trend of early neurovascular changes in retina and choroid of type 2 diabetic patients (T2D), with no or mild diabetic retinopathy (DR), and their association with diabetic kidney disease (DKD). Methods: A prospective longitudinal study with 3 years of follow-up. Diabetic patients with no or mild diabetic retinopathy (DR) were divided according to renal function status into groups with or without DKD. Neurodegenerative and vascular damage were assessed by measuring retinal and choroidal layers using Swept-source OCT (SS-OCT) technology. Vascular density assessment was performed simultaneously, using OCT angiography (OCT-A). Structural parameters were analyzed at baseline (cross-sectional analysis with healthy comparator control group), and prospectively throughout the follow up. Results: Baseline analysis showed a significant difference between group DKD and control for the following parameters: thinning of ganglion cell layer (GCL+), circumpapillary nerve fiber layer (cRNFL) and central retina (CRT), decreased retinal vascular density, increase in foveal avascular zone (FAZ), decrease in choroidal thickness, with no difference in vascular density of the choriocapillary (CC). Longitudinal analysis was performed with the follow-up of 160 eyes of 80 T2D patients, 88 eyes in the DKD group and 72 nDKD. The groups showed no significant difference between structural parameters at início do estudo. No DKD group showed significant worsening of glycemic control and eGRF over time. Concomitantly, in this group, significant thinning in GCL+, subfoveal choroid, decreased vascular density of the superficial retinal plexus with increased FAZ (also observed in the DKD group) and loss of vascular density in CC at nasal and temporal quadrants were observed. Conclusion: Our data showed progressive neurovascular damage to eyes from T2D patients with no or mild RD and suggests a possible association between worsening glycemic control and kidney function parameters with increased trend of neurovascular damage in T2D patients with no DKD and no DR at baseline
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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