1,721,065 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Get PDFWe 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
The urothelium, the urinary microbioma and men lUTS. a systematic review
No full textinTroDUcTion: The pathophysiology and management of male patients with lower urinary tract symptoms (lUTS) is still a matter of debate. in the past few years, the urothelium and the urinary microbiota represented important areas of research to improve the understanding and management of these patients. aim of the present review was to summarize the available data on the urothelium and the microbiota related to male lUTS. eviDence acQUiSiTion: a national center for Biotechnology information (ncBi) PubMed search for relevant articles published between January 2000 and December 2019 was performed using the medical subjects heading “urothelium,” “microbioma,” “microbiota,” “urobioma,” “urobiota,” “benign prostatic hyperplasia,” “benign prostatic enlargement,” “lower urinary tract symptoms,””lower urinary tract dysfunction,” “men,” “male,” “overactive bladder,””receptors.” exclusion criteria included: animal studies and studies on muscarinic and adrenergic pathways. eviDence SYnTHeSiS: The urothelium has been recently evaluated in humans to evaluate new possible markers and pathways. new possible targets for the treatment of male lUTS include the neural growth factor, the cannabinoid, the vanilloid and the aTP pathways. However, studies in humans are still needed to elucidate the exact role of these pathways in the management of male patients with lUTS. The available evidence on the urinary microbioma in male is poor. Standing to the available, urinary microbioma is evident in healthy urine in males. Moreover, the urinary microbioma varies depending on the method of collection, sexually transmitted disease status, inflammation and urinary symptoms. A possible role of probiotics in the management of lUTS in women has been proposed and may have a role in male patients as well. conclUSionS: The urothelium and the urinary microbiota are still poorly studied in men with lUTS. Most of the evidence and the hypothesis on the relationship between urothelium/urinary microbiota and lUTS comes from animal/ in-vitro evidence while clinical trials are lacking. These pathways seem interesting even in lUTS pathogenesis in men but their possible role as a new therapeutic target is still an open debate
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
The role of metabolic syndrome in high grade prostate cancer: development of a clinical nomogram
No full textBacKgroUND: The aim of our study is to develop a clinical nomogram including metabolic syndrome status for the prediction of high-grade prostate cancer (Hg Pca). MeTHoDS: a series of men at increased risk of Pca undergoing prostate biopsies were enrolled in a single center. Demographic and clinical characteristics of the patients were recorded. Metabolic syndrome was defined according to the adult treatment panel iii. a nomogram was generated based on the logistic regression model and used to predict high grade prostate cancer defined as grade group ≥3 (ISUP 2014). ROC curves, calibration plots and decision curve analysis were used to evaluate the performance of the nomogram. RESULTS: Overall, 738 patients were enrolled. Greater than or equal to 294/738 (40%) of the patients presented PCa and of those patients, 84/294 (39%) presented high grade disease (Grade Group ≥3). On multivariate analysis, DRE (OR: 3.24, 95% CI: 1.80-5.84), PSA (OR: 1.10, 95% CI: 1.05-1.16), PV (OR: 0.98, 95% CI: 0.97-0.99) and MetS (OR: 2.02, 95% CI: 1.13-3.59) were predictors of HG PCa. The nomogram based on the model presented good discrimination (AUC: 0.76), good calibration (Hosmer-Lemeshow Test, P>0.05) and a net benefit in the range of probabilities between 10% and 70%. coNclUSioNS: Metabolic syndrome is highly prevalent in patients at risk of prostate cancer and is particularly associated with high-grade prostate cancer. our nomogram offers the possibility to include metabolic status in the assessment of patients at risk of prostate cancer to identify men who may have a high-grade form of the disease. external validation is warranted before its clinical implementation
Smoking reduces PSA accuracy for detection of prostate cancer. Results from an Italian cross-sectional study
No full textBACKGROUND: The aim of our study is to evaluate the diagnostic accuracy of prostate-specific antigen (PSA) according to the smoking status in a cohort of european men undergoing prostate biopsy. MeTHoDS: from 2008 onwards, we consecutively enrolled, at a single institution in italy, men undergoing 12 core transrectal ultrasound-guided prostate needle biopsy. Demographic, clinical and histopathological data were collected. We excluded men who had PSA >30 ng/mL. Patients were classified in three groups: non-smokers, smokers and former smokers. Receiver-operator characteristics (ROC) curve analysis were used to compare predictive properties of PSA across smoking categories for the final histopathological diagnosis of prostate cancer. RESULTS: 872 patients were enrolled. with a median age and PSA of 67 years (IQR: 61/74) and 6.2 ng/mL (IQR: 4.4/9.7) respectively.402/872 patients (46%) were non-smokers; 151 of 872 were smokers (17%) and 319 of 872 were former smokers (36%); 374 of 872 (43%) had cancer on biopsy. PSA accuracy for smokers (AUC= 0.47, P=0.490) was lower when compared to non-smokers (AUC=0.59, P=0.003) and former smokers (AUC=0.59, P=0.005). coNclUSioNS: in a cohort of italian men undergoing prostate biopsy, the performance accuracy of PSa, as a predictor of prostate cancer, is lower in smokers. Although the molecular link behind our findings is still unknown, our study firstly showed that the PSA accuracy for PCa diagnosis is significantly influential by smoking
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