1,720,972 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
Monitoring the prenatal detection of structural fetal congenital anomalies in England and Wales: register-based study
No full textObjective: To provide current population-based prevalence and prenatal diagnosis rates (PND) for specified major congenital anomalies in England and Wales to enable monitoring of the Fetal Anomaly Screening Programme (FASP). Design Secondary analysis of prospectively collected registry data. Setting: Seven multiple-source, population-based congenital anomaly registers, members of the British Isles Network of Congenital Anomaly Registers (BINOCAR) in 2005 and 2006. Population: 2,883 births with congenital anomalies from a total of 601,545 live and stillbirths. Main outcome measures: PND and birth prevalence of selected congenital anomaly groups/subtypes (anencephaly, spina-bifida, serious cardiac, diaphragmatic hernia, gastroschisis, exomphalos, bilateral renal agenesis, lethal/severe skeletal dysplasia, cleft lip with or without cleft palate [CL + /–P]). Results: Of the selected anomaly groups, the most frequently reported were serious cardiac (14.1 per 10,000 births [95% CI 13.0–15.2]) and CL + /–P (9.7 per 10,000 births [8.9–10.5]); the least frequent were bilateral renal agenesis and lethal/severe skeletal dysplasia (<1.5 per 10,000 births). The PND varied for different anomalies from 53.1% (95% CI 43.5–65.2) for serious cardiac anomalies to 99.6% (95% CI 97.9–100.0) for anencephaly. Least variation in PND rates was for anencephaly (range 98.9–100%) and gastroschisis (93.5–100%); greatest variation was for serious cardiac (43.5–65.2%) and lethal/severe skeletal dysplasias (50.0–100%). Conclusions: BINOCAR registers can, uniquely, provide contemporary data on PND and birth prevalence rates to enable monitoring of the ultrasound component of FASP at a national and regional level, allowing comparisons between populations to be made, planning of resources facilitated and assistance for parents making informed decisions on whether to enter the screening programme. <br/
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
Birth prevalence and survival of exomphalos in England and Wales: 2005 to 2011
No full textBackgroundExomphalos occurs in 2.2 per 10,000 births with 76% of these babies surviving to discharge. The aim of this study was to determine the birth prevalence and survival of babies with this anomaly in England and Wales.MethodsSix BINOCAR regional congenital anomaly registers in England and Wales (covering 36% of births) between 2005 and 2011 provided cases for this study. Cases included live births, stillbirths (24+ weeks' gestation), late miscarriages (20–23 weeks' gestation), and terminations of pregnancy with fetal anomaly.ResultsThe overall birth prevalence was 3.8 (95% confidence interval [CI]: 3.6–4.0) per 10,000 births; 1.4 (1.2–1.6) for isolated cases, 1.2 (1.1–1.4) for cases with multiple anomalies, and 1.2 (1.1–1.4) for cases with chromosomal anomalies. The live birth prevalence was 0.8 (0.7–0.9), 0.5 (0.4–0.6), and 0.1 (0.0–0.1) per 10,000 live births, respectively. Edwards syndrome, congenital heart defects, and nervous system anomalies were the most common anomalies associated with exomphalos. A prenatal diagnosis was made in 83% of isolated, 95% of multiple, and 99% of chromosomal cases. Fifty-five percent of isolated and multiple cases were live born, whereas 85% of cases with chromosomal anomalies resulted in a termination of pregnancy with fetal anomaly. The 1-year survival of live born babies with an isolated exomphalos was 92% compared with 81% in cases with multiple anomalies and 27% in cases with chromosomal anomalies (p?<?0.001).ConclusionWe report a higher birth prevalence than has previously been reported. The proportion of infants surviving with exomphalos remained unchanged over the time period<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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