1,721,014 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
Renal and cardiac quantification of sympathetic activity after renal sympathetic denervation in patients with treatment-resistant hypertension
No full textINTRODUÇÃO: A denervação renal (DSR) é eficaz e segura na redução da pressão arterial em pacientes hipertensos resistentes. Alguns preditores de sucesso já foram identificados, mas ainda precisamos de um método que nos permita quantificar e identificar os indivíduos respondedores. A cintilografia com ¹²³I-meta-iodobenzilguanidina (MIBG-123I) é um método diagnóstico que quantifica a atividade nervosa pré-sináptica específica dos órgãos. OBJETIVOS: avaliar a captação renal e cardíaca de MIBG-123I como método de quantificação da denervação renal e o potencial da cintilografia como método para selecionar pacientes candidatos à melhor resposta de redução pressórica com a denervação renal. MÉTODOS: De março de 2018 a dezembro de 2022, selecionamos 39 pacientes em estudo prospectivo, randomizado, unicêntrico, duplo-cego e placebo controlado (2:1). Vinte e seis pacientes foram submetidos a DSR e 13 pacientes foram submetidos angiografia. Características demográficas, MAPA, testes laboratoriais e parâmetros cintilográficos foram comparados entre e dentro dos grupos. RESULTADOS: Os dados demográficos demonstram uma população com elevado risco cardiovascular. O tempo médio de hipertensão foi de 19,5 ± 11,4 anos. Parâmetros do MIBG-123I de captação e washout entre grupos de DSR e controle foram semelhantes na linha de base, 1 e 6 meses após DSR, demonstrando, em no nosso estudo, que os parâmetros cintilográficos não foram capazes de detectar alterações causadas por DSR. O número de ablações realizadas por paciente no grupo DSR foi de 77,12 ± 6,91. Observamos uma queda significativa dos valores da MAPA 1 mês após DSR, com queda média da PAS de 21,17 mmHg e PAD de 13,25 mmHg e queda da PAS de 12,62 mmHg e PAD de 6,96 mmHg aos 6 meses. O número de anti-hipertensivos prescritos no grupo DSR foi reduzido de 6,8 ± 0,7 para 5 ± 1,7 no tempo 2 (p=0,0008) e 5,5 ± 1,8 no tempo 3 (p=0,01). As análises dos subgrupos mostraram que os respondedores tinham, na linha de base, RCM 15 inferior à do grupo não respondedor, tanto em relação PAS MAPA (p=0,01), PAD MAPA (p=0,03) e PAS NOTURNA (p=0,008). Assim, os pacientes com menor RCM 15 são mais propensos a responder à DSR. A RCM 15 basal obtida na variação PAS MAPA foi um bom preditor da probabilidade de resposta ao procedimento (respondedor) com área sob a curva de 0,78. Nos modelos de regressão logística para prever a hipótese de resposta à DSR utilizando PAS MAPA, observamos que RCM 15 surge como um preditor de resposta com OR (Odds ratio) de 0,002 (intervalo de confiança de 90% 0-0,4984, p 0,07), sendo que o aumento de RCM 15 basal em 0,1 unidade aumenta a chance em 85% do indivíduo ser um não respondedor no modelo que define R pela PAS MAPA e em 48% no modelo que define R pela PAD MAPA. CONCLUSÃO: Não observamos nenhum parâmetro cintilográfico renal significativo com ¹²³I-mIBG após DSR entre e dentro dos grupos DSR e controle. Na subanálise do grupo submetido ao DSR, a variável cintilográfica cardíaca RCM 15, dentre outras, pode ajudar na seleção de pacientes candidatos a DSR, aumentando a possibilidade de identificar os respondedores ao procedimento, e devem ser consideradas como geradoras de hipóteses para estudos especificamente concebidos para este fim.BACKGROUND: Renal denervation (RDN) is effective and safe in reducing blood pressure in resistant hypertensive patients. Some predictors of success have already been identified, but we still need a method that allows us to quantify and predict the chance of success. ¹²³I-meta-iodobenzylguanidine (¹²³I-mIBG) scintigraphy is a diagnostic method that offers the possibility of quantifying organ-specific presynaptic nerve activity. OBJETIVES: Our aim was to evaluate renal and cardiac uptake of ¹²³I-mIBG as a possible method of quantifying renal denervation and evaluate the potential of scintigraphy as a method to select patients who are candidates for renal denervation therapy. METHODS: From March 2018 to December 2022, we enrolled 39 patients in prospective, randomized, single-center, double-blind and placebo-controlled study (2:1 ratio). 26 patients underwent renal denervation (RDN), and 13 patients underwent sham procedure. Demographics characteristics, ABPM, laboratory tests and (¹²³I-mIBG) scintigraphy parameters were compared between and within groups. RESULTS: Our demographic data demonstrate a population at high cardiovascular risk. The mean time of hypertension was 19.5 ± 11.4 years. Renal and Cardiac ¹²³I-mIBG uptake and washout between RDN and sham groups, at different times, were similar at baseline, 1 and 6 months after RDN, demonstrating that in our study, the scintigraphy parameters were not able to detect changes caused by RDN. The number of ablations performed per patient in the RDN group, 77.12 ± 6.91. We observed a significant drop in ABPM 1 month after RDN with a mean SBP drop of 21.17 mmHg and DBP of 13.25 mmHg and a drop in SBP of 12.62 mmHg and DBP of 6.96 mmHg at 6 months. Number of antihypertensive medications prescribed in RDN group reduced from 6.8 ± 0.7 to 5 ± 1.7 at time 2 (p=0.0008) and 5.5 ± 1.8 at time 3 (p=0.01). Subgroup analyses showed that the responder patients had at baseline a lower HMR 15 than the non-responder group regarding both ABPM average systolic (p=0.01), ABPM average diastolic (p=0.03) and ABPM nighttime systolic (p=0.008). Thus, patients with lower HMR 15 are more likely to respond more significantly to RDN. Suggesting that patients with higher sympathetic activity expressed by lower HMR may be better responders. The baseline HMR 15 obtained on ABPM average systolic variation was a good predictor of chance of response to the procedure (responder) with area under the curve of 0.78. In the logistic regression models to predict the chance of responders to RDN using the change in ABPM average systolic we observed that baseline HMR 15 emerges as a predictor of response with OR (Odds ratio) of 0.002 (90% confidence interval 0-0.4984, p 0.07) so increasing baseline HMR 15 by 0.1 unit increases the chance by 85% of the individual being a non-responder in the model defining R by ABPM average systolic, and by 48% in the model defining R by ABPM average diastolic. CONCLUSION: No significant changes in renal ¹²³I-mIBG scintigraphy parameters analyzed after RDN with the Symplicity Spyral catheter between and within the RDN and sham groups. However, in the sub-analysis of the group undergoing RDN, the cardiac scintigraphy variables HMR 15 and HMR 4 and renal LK/BG may assist in the selection of candidates for RDN, increasing the chance of identifying responders or non-responders to the procedure, and should be regarded as hypothesis generator for studies specifically designed for this purpose
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
Author Under Sail The Imagination of Jack London, 1893-1902
No full textIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Intro -- Title Page -- Copyright Page -- Dedication -- Contents -- Acknowledgments -- Introduction -- 1. Spirit Truth -- 2. From Absorption to Theatricality and Back Again -- 3. "I Will Build a New Present" -- 4. Sons as Authors -- 5. Fathers as Publishers -- 6. The Daughter as Author -- 7. Lovers as Authors -- 8. At Sea with the Family -- 9. Yellow News, Yellow Stories -- 10. The Return Home -- Notes -- Bibliography -- Index -- About Jay WilliamsIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
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