1,720,975 research outputs found
Análise de variáveis bioquímicas e histopatológicas relativas à DHGNA
No full textLista de participantes anonimizad
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
Influence of insulin resistance on the development of cholecystolithiasis in individuals who underwent Roux-en-Y gastric bypass
Full text linkOrientador: Elinton Adami ChaimTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Ciências MédicasResumo: A ocorrência de colecistolitíase após o bypass gástrico em Y de Roux foi extensivamente descrita na literatura. Uma vez que este procedimento cirúrgico promove significativa melhora na resistência de insulina, que é um dos fatores envolvidos na fisiopatologia da colecistolitíase, este estudo tem por objetivo determinar a influência da resistência insulínica e de sua evolução pós-cirúrgica no desenvolvimento de cálculos biliares. Foi realizado um estudo prospectivo tipo coorte, que envolveu 108 indivíduos obesos mórbidos sem cálculos biliares que foram submetidos ao bypass gástrico em Y de Roux. Os indivíduos foram acompanhados por 24 meses através de exames clínicos, laboratoriais e ultrassonográficos. A resistência insulínica foi mensurada através do marcador indireto "modelo de avaliação homeostática" (HOMA). Dos indivíduos avaliados, 29 (26,8%) desenvolveram cálculos biliares após a cirurgia. Na análise univariada, a ocorrência de colecistolitíase foi associada com o índice HOMA pré-operatório (p<0,0001), glicemia de jejum pré-operatória (p=0,0019), insulinemia de jejum pré-operatória (p=0,0001) e trigliceridemia pré-operatória (p=0,0001). A análise multivariada revelou que o índice HOMA pré-operatório foi o único fator associado de forma independente com os cálculos biliares (p<0,0001). A incidência de colecistolitíase entre indivíduos com resistência insulínica foi de 46,8%; nos indivíduos sem resistência insulínica, a incidência foi de 7,4% (p <0,0001). A resistência insulínica pré-operatória levou a um risco relativo de 6,02 (Intervalo de confiança de 95%: 2,1 ¿ 17,3; p=0,0009) de colecistolitíase. Uma vez que a colecistolitíase comumente ocorre após o bypass gástrico em Y de Roux, há controvérsias quanto a seu manejo. Alguns autores propõem a realização de colecistectomia sistemática juntamente com o bypass gástrico, enquanto outros sugerem que o risco agregado da abordagem concomitante é significativamente maior. Como a resistência insulínica pré-operatória foi um fator de risco significativo neste estudo, pode ser proposta uma abordagem individualizada para esta população. A realização de mais estudos é necessária para confirmar estes resultados e possibilitar uma análise mais profundaAbstract: The occurrence of gallstones following Roux-en-Y gastric bypass has been extensively reported. As Roux-en-Y gastric bypass promotes improvement in insulin resistance, which is one of the factors enrolled in the pathophysiology of gallstones, this study aims to determine the influence of insulin resistance and its postoperative course on the development of gallstones. This is a prospective cohort study that enrolled 108 morbidly obese subjects free of gallstones which underwent Roux-en-Y gastric bypass and were followed up for 24 months, through clinical, laboratory, and ultrasound examinations. Insulin resistance was assessed through the surrogate marker homeostasis model assessment (HOMA). Of the individuals evaluated, 29 (26.8%) developed gallstones following Roux-en-Y gastric bypass. In the univariate analysis, postsurgical gallstones were associated with preoperative HOMA (p<0.0001), preoperative fasting glucose (p=0.0019), preoperative fasting insulin (p=0.0001), and preoperative triglycerides (p=0.0001). Multivariate analysis revealed that preoperative HOMA was the only factor independently associated with gallstones (p<0.0001). The incidence of gallstones among individuals with insulin resistance was 46.8%; in the group without insulin resistance, the incidence was 7.4% (p<0.0001). Preoperative IR led to a relative risk of 6.02 (95% Confidence interval: 2.1 ¿ 17.3; p= 0.0009) of gallstones. As gallstones often occur following Roux-en-Y gastric bypass, there is controversy regarding their management. Some authors propose systematic cholecystectomy along with Roux-en-Y gastric bypass, while others suggest that the aggregate risk of the concomitant approach is significantly higher. As insulin resistance was a significant risk factor in this study, an individualized approach for this population may be proposed. Further research is needed to confirm these findingsDoutoradoFisiopatologia CirúrgicaDoutor em Ciência
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
- …
