1,720,967 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
Design, Synthesis, and a1-Adrenoceptor Binding Properties of New Arylpiperazine Derivatives bearing a Flavone Nucleus as the Terminal Heterocyclic Molecular Portion
No full textFollowing our research project aimed at obtaining new compounds with high affinity and selectivity toward α1-adrenoceptors (AR), a new class of piperazine derivatives was designed, synthesized and biologically tested. The new compounds 1-13 are characterized by a flavone system linked, through an ethoxy or propoxy spacer, to a phenyl- or pyridazinone-piperazine moiety. Biological data showed an interesting profile for the phenylpiperazine subclass found to have a nanomolar affinity toward α1-AR, and less pronounced affinity for α2-AR and the 5-HT1A serotoninergic receptor. A discussion on the structure-activity relationship (SAR) of such compounds is also reported, on the basis of the flavone substitution pattern, length and functionalization of the spacer, and disruption of the phenylpiperazine system
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
Palliative management of malignant antro-pyloric strictures.Gastroenterostomy vs.endoscopic stenting.A randomized prospective trial.
No full textBACKGROUND: Gastroenterostomy was the palliative treatment of choice in patients with malignant unresectable gastric outlet obstruction. Palliative endoscopic treatment of malignant gastric outlet obstruction with endoluminal self-expanding metallic stents is nowadays a well-established procedure. PATIENTS AND METHODS: Eighteen patients referred for treatment with diagnosis of malignant strictures of the antro-pyloric tract presenting at an advanced unresectable stage. The patients were randomly assigned into two treatment groups (endoscopic vs. surgery) according to random-number tables. The length of procedure, morbidity and mortality rate, restoration of oral intake and gastric emptying at 8, 15 days and 3 months from treatment and hospital stay were assessed. RESULTS: Endoscopic group: The median length of procedure was 40 minutes. No death and one minor complication (11.1%) was reported. Mean time for oral intake was 2.1 days. Gastric emptying was satisfactory in 88.9% after 8 days and in 100% of patients after 15 days and 3 months. The median hospital stay was 3.1 days. Surgery group: The median length of the operation was 93 minutes. No mortality was reported. One patient (11.1%) developed anastomotic bleeding which required relaparotomy. Mean time for oral intake was 6.3 days. Gastric emptying was satisfactory in 66.7% of patients after 8 days, in 88.9% after 15 days and in 100% after 3 months. The median hospital stay was 10 days. CONCLUSION: There were no statistically significant differences between the 2 groups even with respect to morbidity, mortality, delayed gastric emptying and clinical outcomes at 3-month follow-up. Endoscopic stenting was significantly more effective with respect to operative time, restoration of oral intake and median hospitalization. Our results would suggest that endoscopically placed metal stents offer an effective alternative to surgical palliation in patients with unresectable malignant strictures
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
- …
