1,720,963 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
Nitrendipine: evaluation of the duration of the antihypertensive effect at different doses using the conventional method and ambulatory monitoring of arterial pressure
No full textTo evaluate the effect-duration of nitrendipine in 20 moderate essential hypertensives (aged from 42 to 66, mean +/- SD: 55 +/- 7) when treated with 20 mg once or twice a day, we utilized the blood pressure standard method of measurement and the ambulatory monitoring. Blood pressure determinations were made during the follow-up at 2- week intervals for 3 months, each measurement being made with a mercury sphygmomanometer, 24 +/- 3 hours after the last dose; laboratory parameters, 2 24-hour blood pressure monitoring (ICR 5200, Spacelabs) and standard ECG were performed at baseline and after 3 months. Following a 2-week run-in period with placebo bid (at 10.00 am and 10.00 pm) a 20 mg morning dose of nitrendipine was started continuing the administration of the placebo tablet at 10.00 pm. The dosage was changed to a twice active daily regimen, with an increase in the daily dose (20 mg twice a day) in those patients whose diastolic blood pressure remained greater than 90 mmHg after a 4-week control. After the twelfth week, another 2-week placebo run-in followed the active treatment. Supine blood pressure recorded after 3-month therapy, showed a significant (p less than 0.0001) reduction in both systolic and diastolic mean values (22/15 mmHg) at the end of active treatment in the 16 patients who ended the trial. In particular, the responders to 20 mg (5 patients) showed a blood pressure reduction of 18 mmHg in comparison with the run-in period; in the other group of responders to increasing dosage of 40 mg (11 patients), we observed a 8 mmHg diastolic blood pressure reduction at 28 days and a successive 7 mmHg at the end of the treatment.(ABSTRACT TRUNCATED AT 250 WORDS
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
Intima-media thickness (imt) and rf-based quality intima-media thickness (rfqimt) measurements in a sample of patients attending an outpatient hypertension centre
No full textIntroduction: The RFQIMT (Esaote-Italy) is a method of new generation for real-time measurement of intima-media thickness of the supra-aortic trunks. It is based on the direct radio-frequency analysis of the signal that allows to obtain data at high spatial resolution and thus improve the standard of a measure which has proved as surrogate marker of cardiovascular disease. The absolute values of IMT, indicated as standard ones by current literature and measured by the method recommended by the guidelines of the Italian Society of Vascular Diagnostics (accepted as European Guidelines) do not take into account of independent variables such as age, sex and race that may influence the correlation of this index at any level of vascular and cardiac damage. The aim of our study was to compare the values of intima-media thickness measured by the above method compared to those obtained by the method of radio-frequency taking into account the variables mentioned above.
Materials and Methods: We submitted 250 patients examined in succession in our hypertension centre to measure the intima-media thickness with conventional method (3 measurements at the level of common carotid artery, 1 cm from the carotid bifurcation) and RFQIMT. Patients had a mean age of 52.5 ± 22.5, 118 were males and 132 females, and all Caucasians. Patients had the following comorbidities: 210 patients were hypertensive patients, 126 dyslipidemic, 87 patients with diabetes, 14 patients with CAD, 72 patients with carotid plaques and 93 patients smokers.
Results: 123 patients had RFQIMT above the normal values and IMT among limits, 56 had normal both RFQIMT and IMT and 71 had both RFQIMT and IMT above the normal values.
Conclusions: When we take into account the value of RFQIMT compared to IMT, the index of cardiovascular risk linked to intima-media thickness increased significantly in more patients: 123 with RFQIMT increased compared with 71 with IMT increased. This preliminar evidence changes the correlations with the co-morbidity and makes the measure that uses radio-frequency more accurate and reliable
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
UNA VOCE NEL SILENZIO EMOTIVO: IL VISSUTO DELLA RABBIA NELLE PERSONE ALESSITIMICHE
No full textIntroduzione
Nonostante sia noto che le persone alessitimiche ricorrano a strategie di regolazione emotiva disadattive, come la soppressione (Swart et al. 2009), e tendano a sperimentare in misura maggiore stati di rabbia (Berenbaum & Irvin, 1996), a oggi la relazione tra tali aspetti non è stata adeguatamente approfondita.
Obiettivi
Lo studio si propone di valutare se le persone con alti livelli di alessitimia sperimentano in misura maggiore l'emozione della rabbia e se esprimono maggiori livelli di rabbia rivolti verso l'interno, suggerendo un maggior ricorso alla strategia di soppressione emotiva.
Metodo
Hanno partecipato 195 persone (M/F=83/112; età media=63,85±14.43), estratte da 384 volontari reclutati presso il Policlinico Umberto I° di Roma. I partecipanti sono stati selezionati in base ai punteggi dei cut-off della TAS-20 e suddivisi in tre gruppi con età anagrafica bilanciata: non alessitimici (N=63), moderatamente alessitimici (N=75) e alessitimici (N=57). Sono stati somministrati lo State-Trait Anger Expression Inventory, per la valutazione della rabbia, e l'Emotional Regulation Questionnaire, per valutare le strategie di regolazione emotiva.
Risultati
Le ANOVA hanno considerato come fattore indipendente l’Alessitimia e, separatamente, come fattori dipendenti le dimensioni della rabbia e le strategie di regolazione emotiva. I risultati hanno evidenziato una differenza tra i gruppi nella rabbia (Rao's6.38=7,81; p<.0001), con maggiori livelli di rabbia di stato (F2.19=10,00;p<0001), di tratto (F2.19=17,00;p<.0001) e di espressione della rabbia (F2.19=18,97;p<0001) negli alessitimici. I sotto-fattori dell'espressione della rabbia hanno indicato che questo sentimento è maggiormente rivolto verso l'interno (F2.19=15,74; p<0001).
I gruppi alessitimici e moderatamente alessitimici adottano in misura maggiore la strategia di soppressione emotiva (F2.19=10,31;p<0001), risultato che potrebbe spiegare il meccanismo cognitivo sotteso alla rabbia rivolta verso l'interno.
Conclusioni
Il vissuto di rabbia sembra costituire un'esperienza rilevante nei soggetti alessitimici. L'espressione della rabbia verso l'interno rifletterebbe il ricorso alla strategia di soppressione delle emozioni, che ostacolerebbe la manifestazione di un'emotività socialmente adattiva
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