1,720,970 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
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
Prognostic value of frontal QRS-T angle in patients undergoing myocardial revascularization or cardiac valve surgery
No full textBackground: An abnormal frontal QRS-T angle (fQRSTa) is associated with increased risk of death in primary and secondary cardiovascular prevention. The aim of this study was to evaluate the fQRSTa prognostic role in patients undergoing myocardial revascularization and/or cardiac valve surgery. Methods: We enrolled and prospectively followed for 48 ± 26 months 939 subjects with available QRS and T axis data; mean age was 68 ± 12 years, 449 patients (48%) underwent myocardial revascularization, 333 (35%) cardiac valve surgery, 94 (10%) valve plus bypass graft surgery and 63 (7%) cardiac surgery for other cardiovascular (CV) diseases. The ECG variables were collected at the end of the cardiac rehabilitation program and fQRSTa was considered normal if 120° borderline otherwise. Endpoints were overall and CV mortality. Results: The fQRSTa was normal in 333 patients (36%), borderline in 285 (30%) and abnormal in 321 (34%). Overall (p = 0.012) and cardiovascular (p = 0.007) mortality were significantly higher in patients with abnormal fQRSTa even after adjusting separately for gender, PR-, QTc- intervals, presence of right or left bundle branch block and left atrial volume index. The predictive value was confirmed in patients with stable coronary artery disease (SCAD), not in patients with acute coronary syndrome or valve disease. SCAD patients with abnormal both fQRSTa and QRS axis had higher risk of overall (hazard ratio = 2.9, p < 0.0001) and CV (hazard ratio = 4.4, p < 0.0001) mortality compared with SCAD patients with normal fQRSTa, even after multivariate adjustment for age, gender, ECG intervals, left-ventricle ejection fraction and mass index. Conclusions: In SCAD patients undergoing myocardial revascularization, abnormal fQRSTa is independent predictor of overall and CV mortality
Reintegro lavorativo del paziente cardiopatico e ruolo del test cardiopolmonare in laboratorio e durante attività lavorativa: esperienze di uno studio pilota.
No full textIl 45% delle sindromi coronariche acute si verifica in età lavorativa, e spesso il reintegro all’attività è possibile nel 70% dei pazienti. Il test cardiopolmonare in laboratorio è lo strumento principale per la valutazione della capacità funzionale; l’utilizzo di un test cardiopolmonare portatile, derivato dall’utilizzo in Medicina Sportiva, potrebbe essere impiegato nella registrazione del consumo lavorativo.
Lo studio ha in prima istanza valutato con una survey il reintegro lavorativo in Emilia-Romagna (156 pazienti dimessi da 12 mesi dall’Ospedale di Piacenza), evidenziando come circa solo il 70% dei pazienti non torni all’attività lavorativa; tali pazienti erano prevalentemente lavoratori con attività di tipo manuale e con frazione di eiezione ridotta.
Successivamente sono stati arruolati 59 pazienti con recente sindrome coronarica acuta e lavoro di tipo manuale e sottoposti a test cardiopolmonare in laboratorio; l’utilizzo del test per la valutazione della capacità funzionale ha mostrato un significativo miglioramento del reintegro lavorativo a distanza di 12 mesi rispetto ai dati della survey e della letteratura (86%Vs 70% - p = 0.03).
Per la terza parte dello studio sono stati arruolati 28 pazienti con recente sindrome coronarica acuta e lavoro ad alto dispendio energetico (METs > 3); sono stati a test cardiopolmonare in laboratorio e a test cardiopolmonare portatile durante attività lavorativa (onsite), con una registrazione di 60-80 minuti. Il test è stato eseguito senza complicanze in tutti i pazienti ed è riuscito a misurare in modo specifico il consumo individuale delle singole mansioni lavorative. I consumi sono stati in media elevati (consumo medio lavorativo V02/V02 max laboratorio 57% ± 12), con raggiungimento
della soglia anerobica (R medio 0,98 ±1); il test ha permesso una individualizzazione delle mansioni che ha portato ad un reintegro lavorativo a distanza di 12 mesi del 96%, significativamente maggiore dei dati in letteratura e delle due parti precedenti dello studio (p<0.01
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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