1,720,986 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
Placental growth factor (PLGF)-based testing to help diagnose suspected pre-eclampsia: a systematic review and economic evaluation
No full textBackgroun: predicting a diagnosis of pre-eclampsia is based on a combination of clinical assessment of blood pressure, presence of protein in the urine, symptoms, and laboratory test abnormalities. Accurately detecting pre-eclampsia is important to avoid false-positive diagnoses which could lead to unnecessary antenatal admissions and/or preterm delivery. Four blood tests that measure the biomarkers of placental growth factor (PLGF) or the ratio of soluble fms-like tyrosine kinase 1 (sFlt-1) to PLGF, are available (known as Triage, Elecsys, DELFIA Xpress, and BRAHMS Kryptor tests). Abnormal measurements of these biomarkers can be used as an aid to predict a diagnosis of pre-eclampsia and maternal and fetal outcomes.Objectives: to evaluate the test accuracy, clinical effectiveness and cost-effectiveness of PLGF-based tests used in conjunction with standard clinical assessment for predicting pre-eclampsia and maternal and fetal outcomes in pregnant women who are referred to secondary care with suspected pre-eclampsia in weeks 20–37 of pregnancy.Data sources and methods: a systematic review of the diagnostic/prognostic accuracy and clinical effectiveness of PLGF-based tests with standard clinical assessment. Database included MEDLINE, Embase, and Cochrane Library,. Other sources searched included relevant conference proceedings and websites, grey literature and research in progress. The most recent date of searching was 18th March 2021. An independent economic analysis was conducted using a decision tree model. The model includes short term costs and quality-adjusted life years (QALYs) for the management of women, maternal and neonatal outcomes and long-term outcomes for severe neonatal complications. The model compared the use of the test alongside standard clinical assessment to standard clinical assessment only. Two different estimates of standard clinical assessment were included, from the INSPIRE study and from NICE Diagnostic Guidance 23.Results: seventeen studies were included in the systematic review. Two large, randomised trials provided the best available evidence to inform the economic model - The PARROT trial (Triage test) and the INSPIRE trial (Elecsys test). When used as rule-out tests for pre-eclampsia (with neonatal outcomes included), all four tests produced higher QALYs and higher costs than both types of standard clinical assessment. The incremental cost per QALY ranged from £637 (DELFIA test vs standard clinical assessment from INSPIRE) to £47,393 (Triage test vs standard clinical assessment from DG23) per QALY. Incremental costs and QALYs were always very small, with incremental costs always less than the cost of the test and incremental QALYs always less than 0.006.Limitations: although the evidence for PLGF-based tests is advancing there remains uncertainty for key, such as diagnostic sensitivity and specificity. This particularly affects the Elecsys test. Conclusions: despite uncertainties from lack of data, and heterogeneity across studies, the use of PLGF-based tests to rule-out and rule-in pre-eclampsia has the potential to provide improved outcomes at reduced cost when compared with standard clinical assessment. Future work: future research priorities include more rigorous evaluation of the DELFIA and BRAHMS PLGF-based tests, more evidence for Triage and Elecys as rule in tests, and greater focus on black, and Asian and mixed ethnicity groups.<br/
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
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