1,720,984 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
Myocardial infarction and diabetes mellitus : studies on glucose lowering therapies and novel risk markers based on observations from the DIGAMI 2 trial
No full textBackground: Patients with myocardial infarction (MI) and type 2 diabetes (T2DM) and have a poor prognosis. Hyperglycemia is an independent risk predictor. The best tools for glucose control are debated. Important is identification of biomarkers to gain further pathophysiological insights and new therapeutic possibilities.Aims: In patients with acute MI and T2DM: 1. Explore the prognostic impact of hypoglycemia during hospitalization for MI; 2. Study the prognostic impact of glucose lowering treatment; 3. Investigate the relation between Copeptin and IGFBP-1 and their prognostic impact; and 4. Characterize MBL geno- and phenotypes and to investigate their prognostic importance.Study population: This thesis is based on epidemiological reports from the DIGAMI 2 trial comprising 1253 patients with T2DM and acute MI. DIGAMI 2 was a randomized trial with the primary aim to compare three glucose lowering strategies testing the hypothesis that insulin-based metabolic control reduces mortality.Hypoglycemia during hospitalization for acute MI: Hypoglycemic episodes were recorded in 153 patients (symptomatic = 45). Patients with hypoglycemia were older, had a longer duration of T2DM, a lower body weight and more often a history of heart failure. The mortality and cardiovascular morbidity did not differ between patients with or without hypoglycemia besides that patients who were symptomatic were at increased risk of death. This higher risk disappeared after adjustment for confounding factors.Glucose lowering treatment and prognosis: During the initial follow-up of 2.3 years the adjusted hazard ratio (HR) for non-fatal MI and stroke, in patients discharged alive (n=1181), was 1.73 (95% CI 1.26 2.37; p =0.0007) with insulin treatment, 0.81 (95% CI 0.57 1.14; p = 0.23) with sulphonylureas and 0.63 (95% CI 0.42 0.95; p = 0.03) with metformin. None of the glucose lowering treatments influenced mortality. The odds ratio for insulin on non-fatal cardiovascular events was 1.90 (95% CI 1.38-2.63; p=Novel risk markers and prognosis: Copeptin, a surrogate marker for vasopressin, was associated with IGFBP-1 (r = 0.53; pConclusions: Hypoglycemia during hospitalization is not an independent risk factor for mortality and cardiovascular morbidity in patients with T2DM and MI. It is more prevalent in patient at high risk for other reasons. Glucose lowering agents seem to impact cardiovascular morbidity, mortality and deaths from malignancies, a finding that deserves further evaluation. Copeptin may explain at least some of the prognostic impact ofIGFBP-1 in these patients an observation that may open for new therapeutic attempts. MBL did not have a significant impact on prognosis.List of scientific papersI. Mellbin LG, Malmberg K, Waldenström A, Wedel H, Rydén L; DIGAMI 2 investigators (2009). "Prognostic implications of hypoglycaemic episodes during hospitalisation for myocardial infarction in patients with type 2 diabetes: a report from the DIGAMI 2 trial." Heart 95(9): 721-7. Epub 2008 Nov 24 https://pubmed.ncbi.nlm.nih.gov/19029171II. Mellbin LG, Malmberg K, Norhammar A, Wedel H, Rydén L; DIGAMI 2 Investigators (2008). "The impact of glucose lowering treatment on long-term prognosis in patients with type 2 diabetes and myocardial infarction: a report from the DIGAMI 2 trial." Eur Heart J 29(2): 166-76. Epub 2007 Dec 21 https://pubmed.ncbi.nlm.nih.gov/18156614III. Mellbin LG, Malmberg K, Norhammar A, Wedel H, Rydén L (2010). "Insulin in patients with acute myocardial infarction and diabetes friend or foe A report from the DIGAMI 2 study" (Submitted)IV. Mellbin LG, Rydén L, Brismar K, Morgenthaler NG, Ohrvik J, Catrina SB (2010). "C-terminal-ProVasopressin (Copeptin), IGFBP-1 and cardiovascular prognosis in patients with type 2 diabetes and acute myocardial infarction: A report from the DIGAMI 2 trial." Diabetes Care Apr 22: Epub ahead of print https://pubmed.ncbi.nlm.nih.gov/20413521V. Mellbin LG, Hamsten A, Malmberg K, Steffensen R, Rydén L, Öhrvik J, Hansen TK (2010). "Mannose-binding lectin genotype and phenotype and their impact on cardiovascular prognosis in patients with type 2 diabetes and myocardial infarction A report from the DIGAMI 2 trial" (Submitted)</p
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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