1,720,997 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
Impact of Treating Maternal Periodontal Disease on the Risk of Preterm Birth and Low Birth Weight: An Umbrella Review of Systematic Reviews
Full text linkPregnancy involves complex physical and hormonal changes that significantly impact almost every organ system, including the oral cavity. The presence of oral disease in women has consequences for both their child and their health. The two main oral conditions linked to pregnancy are gingivitis and periodontal disease. Several studies have demonstrated that there is a positive association between periodontal disease and adverse pregnancy outcomes such as preterm birth (PTB) and low birth weight (LBW). PTB and LBW are among the leading causes of perinatal mortality and morbidity. It has been hypothesized that periodontal disease may cause PTB and/or LBW either directly through the presence of gram-negative anaerobic bacteremia originating in the gingival biofilm or indirectly through the production of pro-inflammatory markers which enter the bloodstream from the gingival submucosa. The ultimate result of both pathogenic pathways is the same, the development of an immune inflammatory response and/or the local suppression of growth factors in the fetal–placental unit (including the myometrium, membranes, amniotic fluid, placenta, circulation, and fetal tissues), which in turn shortens gestational age and triggers labor. Overall, the impact of treating maternal periodontitis on the risk of PTB or LBW remains unclear despite numerous observational studies reporting that periodontal disease is positively associated with adverse birth outcomes. Despite that umbrella reviews of systematic reviews have been published on this topic, recent high-quality systematic reviews have been published and thus, there is a need for updated umbrella reviews that includes evidence from multiple sources. In the present umbrella review, we aim to review the evidence of the impact of treating maternal periodontitis on the risk of PTB and LBW, which is a prerequisite to formulating guidelines regarding this issue.https://digitalcommons.odu.edu/gradposters2023_healthsciences/1015/thumbnail.jp
Severe malaria in children in Yemen : a study of risk factors and clinical presentation
No full textEThOS - Electronic Theses Online ServiceGBUnited Kingdo
Trends in Stunting, Underweight and Overweight Among Children Aged \u3c 5 Years in Kuwait: Findings From Kuwait Nutritional Surveillance System (2007-2019)
Full text linkBackground: There is a paucity of data on the secular trends of stunting and overweight among children aged \u3c 5 years in oil-rich countries in the Middle East.
Aims: To examine the secular trends of stunting, underweight and overweight in children aged \u3c 5 years in Kuwait between 2007 and 2019.
Methods: We used large individual data records (n=48 108) from the Kuwait Nutritional Surveillance System (KNSS) to calculate height/length-for-age z score (HAZ), weight-for-age z score and body mass index (BMI)-for-age z score using World Health Organization growth references. Stunting and underweight were defined as less than -2 standard deviation (SD) and overweight (including obesity) as ≥ 2 SD. Trends of stunting, underweight and overweight were investigated using logistic regression models.
Results: The prevalence of stunting, underweight and overweight was 5.15%, 2.33% and 10.78%, respectively. Stunting increased during the study period, among children aged \u3c 2 years. There was no increasing trend in overweight during the study period. These findings were corroborated by the distribution of HAZ and BMI-for-age z scores. Current prevalence of combined stunting and overweight was 1.53% in boys and 1.98% in girls.
Conclusion: Current prevalence of stunting and underweight is low in Kuwait indicating that undernutrition is no longer a major public health issue. There is a tendency for stunting to increase in children aged less than 2 years, highlighting the need to investigate early causes of stunting such as maternal and pregnancy-related factors
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
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