1,720,970 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
Organizacija promocije novega izdelka prodajalcem na drobno : diplomsko delo univerzitetnega študija
No full textCAN THE DEGREE OF CORONARY COLLATERALISATION BE USED IN CLINICAL ROUTINE AS A VALID ANGIOGRAPHIC PARAMETER OF VIABILITY
Get PDFNamen: Stopnja uspešnosti perkutanih koronarnih arterijskih posegov (PCI) na lezijah s kronično popolno okluzijo (CTO) se je v zadnjih letih povečala, vendar je izboljšanje funkcije možno le, če je prisotna viabilnost miokarda. Eden najpomembnejših dejavnikov ohranjanja viabilnoti miokarda je odpiranje in razvoj kolateral. Naša hipoteza je bila, da višja stopnja kolateral pomeni izboljšano viabilnost miokarda.
Metode: Pri 38 bolnikih smo primerjali stopnjo kolateral, ocenjeno s konvencionalnim koronarnim angiogramom (CCA) in razvrščeno po klasifikaciji Rentrop, s parametri viabilnosti (delež brazgotine, krčljivost in EDWT), ki smo jih pridobili s preiskavo ocene viabilnosti z magnetno resonanco.
Rezultati: Ugotovili smo statistično pomembno povezavo med stopnjo kolateral, določeno z metodo Rentrop, in deležem brazgotine, izmerjenim s CMR (p = 0,001T = - 0,144). Naša študija kaže tudi močno statistično pomembno povezavo med stopnjo kolateral in krčljivostjo, ki je bila izmerjena na ordinalni način (normalna, blaga hipokinezija, huda hipokinezija, diskinezija in akinezija) (p = 8,86 × 10-8T = 0,215). Obe asociaciji sta pokazali povečano razmerje med viabilnim in neviabilnimi miokardom glede na stopnjo kolateral. Ugotovili smo, da ima stopnja kolateral nizko NPV za neviabilen miokard (29%) in visoko PPV za viabilen miokard (82%) s skupno natančnostjo 74%.
Zaključek: naša študija kaže, da bi bilo koristno rutinsko oceniti kolaterale pri angiografiji pri bolnikih s CTO za oceno viabilnosti miokarda.Purpose: The success rate of percutaneous coronary artery intervention (PCI) of chronic total occlusion (CTO) lesions have increased in the recent years. However, improvement of function is only possible when significant myocardial viability is present. One of the most important factors of maintaining myocardial viability is the opening and development of collaterals. Our hypothesis was that with a higher degree of collaterals more viable myocardium is present.
Methods: In 38 patients we compared the degree of collaterals, evaluated with a conventional coronary angiogram (CCA) and graded by the Rentrop classification, to viability parameters (transmural extent of the scar, contractility and EDWT) obtained in a viability study with magnetic resonance (MRI).
Results: We found a statistically significant association of the degree of collaterals determined with Rentrop method and transmural extent of the scar as measured by CMR (p=0.001T= -0.144). Our study also shows strong statistically significant association between the degree of collaterals and contractility measured in ordinal manner (normal, mild hypokinesia, severe hypokinesia, dyskinesia and akinesia) (p=8.86×10-8T=0.215). Additionally, both associations showed an increase in the ratio between viable vs. non-viable myocardium with the degree of collaterals. We found that that the degree of collateralization has a low NPV for non-viable myocardium (29%) and high PPV for viable myocardium (82%) with overall accuracy of 74%.
Conclusion: Our study suggests that it may be beneficial to routinely grade the collaterals at angiography in patients with CTO as an assessment of myocardial viability
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
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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