1,720,981 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
Fetal Weight and Maternal Ethnicity: Our Experience in a Region with a Higt Immigration Rate
No full textMenstrual abnormalities and predisposition to pregnancy-related hypertensive disorders: a retrospective study
No full textObjective. Pregnancy-related hypertensive disorders (PRHDs) are a leading cause of maternal and perinatal morbidity
and mortality in developed countries. This study investigated a possible association of PRHDs with menstrual
abnormalities.
Materials and Methods. We contacted all women with PRHDs who delivered in our clinic between 2004 and 2007 as well as
a random control cohort without pregnancy complications and asked them about their menstrual cycle characteristics.
Statistical analyses were performed using R, with significance set at p50.05.
Results. We collected data for 237 women with normal pregnancies and 255 women with PRHDs, among whom 143 had
gestational hypertension and 70 had mild and 41 severe preeclampsia. By monovariate analysis, PRHDs correlated with
dysmenorrhoea, hypermenorrhoea and menstrual irregularity (p50.05). By multivariate analysis, the occurrence of PRHDs
was influenced by dysmenorrhoea and menstrual irregularity (p50.05).
Conclusions. PRHDs usually affect women with painful or irregular menstrual cycles, perhaps due to metabolic syndrome or
molecular pathways involving vasoactive substances, with clear vascular implication
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
"Water or not water: That is the question." Analysis of costs and consumption of the operating theaters in a greener perspective
Full text linkObjective: To compare the amounts of water and plastic used in surgical hand washing with medicated soaps and with alcohol-based products and to compare costs and consumption in a year, based on scheduled surgical activity. Method: This retrospective study was carried out at Udine's Gynecology Operating Block from October to November 2022. We estimated the average amount of water with a graduated cylinder and the total cost of water usage based on euros/m3 indicated by the supplier; for each antiseptic agent we collected the data relevant to wash time, amount of water and product used per scrub, number of handscrubs made with every 500 mL bottle and cost of a single bottle. We put data into two hypothetical contexts, namely WHO guidelines and manufacturers' recommendations. Data were subjected to statistical analysis. Results: The daily amount of water using povidone-iodine, chlorhexidine-gluconate and alcohol-based antiseptic agents was 187.6, 140.7 and 0 L/day (P value = 0.001), respectively; A total of 69 000 L/year of water would be saved if alcohol-based products were routinely used. A single unit of an alcohol-based product allows three times as many handscrubs as any other product (P value = 0.001) with consequent reduction in plastic packaging. Conclusion: Despite the cost saving being negligible, choosing alcohol-based handrub over medicated soap handrub - on equal antiseptic efficacy grounds - could lead to a significant saving of water and plastic, thus making our operating theaters more environmentally friendly
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