1,720,969 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
Streptococcus Pneumonia-Associated Hemolytic Uremic Syndrome: A Case Report
Full text linkHemolytic uremic syndrome (HUS), a disease that destroys red blood cells, is the most common cause of sudden, short term acute kidney failure in children. By far, the commonest subgroup (>90% of childhood HUS) is induced by shiga toxin producing bacteria, usually enterohemorrhagic Escherichia coli (EHEC). These patients typically have a prodrome of diarrhea. Another important subgroup that is readily identified on clinical grounds follows invasive Streptococcus pneumonia infection. These infants tend to be younger than those with D + HUS, and the syndrome is very rare after the age of 4 years. They present with pneumonia, empyema, meningitis, and less often, isolated septicemia. Another group of patients may have mutations in complement regulators, and less often, inherited deficiency of von Willebrand protease or an inborn error of cobalamin metabolism. We report a 6-month-old child who developed hemolytic uremic syndrome following S. pneumonia meningitis.Keywords: Hemolytic-Uremic Syndrome; Meningitis; Streptococcus pneumonia; Chil
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
Intra-Dialysis Hypotension in Patients Undergoing Hemodialysis
Full text linkIntroduction: Intra-dialysis hypotension occurs in 20- 55% of hemodialysis sessions. We aimed to define the prevalence and impact of pre-dialysis blood pressure, inter-dialysis weight gain, vasodilator agents, and characteristics of dialysis, serum calcium, and adjusted calcium, sodium, and albumin levels on intra-dialysis hypotension.Materials and Methods: In an observational prospective study, 44 hemodialysis cases aged 4.8-25 years were evaluated in 552 dialysis sessions. A decrease in the mean arterial blood pressure ≥ 10 mm Hg was defined as intra-dialysis hypotension. The characteristics of the patients were compared between cases and those without intra-dialysis hypotension.Results: Intra-dialysis hypotension was noted in 61.4% of the cases and 24.6% of the dialysis sessions. The duration of hemodialysis, weight gain between dialysis sessions, using vasodilator medications, serum sodium and adjusted calcium levels were compared between IDH + and IDH – cases. No significant differences were found in these variables between the 2 groups (P> 0.05 for all). Intra-dialysis hypotension was significantly more prevalent in cases with normal versus high systolic and diastolic blood pressure (P=0.014 and P=0.005 respectively). Intra-dialysis hypotension was significantly more frequent in girls, anuric patients, and patients with a history of transplantation (p=0.022, 0.011 and 0.008 respectively). A Significantly lower serum albumin concentration was found in cases with intra –dialysis hypotension (P=0.021).Conclusions: Intra-dialysis hypotension is a common complication of hemodialysis and is more prevalent in girls, normotensive patients, subjects with lower serum albumin concentrations, cases with a history of transplantation, and anuric patients. Keywords: Hemodialysis; Blood Pressure; Hypotension; Serum Albumin; Serum Calcium
A Review of Coronavirus Disease (COVID-19) in Children
Full text linkAbstract:
Since December 2019, an outbreak of coronavirus disease 2019 (COVID-19) with a high morbidity and mortality rate has spread globally and affected all age groups. Children can carry and transmit the novel coronavirus, but usually do not develop severe disease. The number of children who contracted coronavirus disease 2019 has increased significantly; however, compared to adults, there have been fewer reported cases of COVID-19 in the pediatric population. This review is mainly about the epidemiological features, clinical findings, laboratory tests, imaging, and treatment recommendations in children with COVID-19 disease
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