1,720,956 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
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
Ecografia toracica nella polmonite da SARS-CoV-2: ruolo nel monitoraggio del paziente ospedalizzato e nel percorso di follow-up
No full textBackground. La pandemia causata da SARS-CoV-2 ha messo a dura prova i sistemi sanitari di tutto il mondo. L’infezione da SARS-CoV-2 causa una malattia sistemica (COVID-19) che si manifesta con differenti quadri clinici, da una polmonite lieve-moderata, fino ad arrivare a forme più severe con insufficienza respiratoria acuta e coinvolgimento multiorgano. L’ecografia polmonare (LUS) è una metodica che è stata utilizzata nella pandemia per valutare “bed-side” l’impegno polmonare nel COVID-19.
Scopo. L’obiettivo primario di questo studio è stato quello di descrivere l’evoluzione dei pattern ecografici della polmonite COVID-19 durante il primo follow-up (a 3 mesi dalla dimissione ospedaliera) utilizzando la LUS con una metodica standardizzata e uno score numerico. Inoltre, i risultati dell’impegno polmonare valutati con la LUS sono stati confrontati con quelli ottenuti con la tomografia computerizzata ad alta risoluzione (HRCT) del torace.
Pazienti e metodi. L’indagine è stata condotta su 162 pazienti con diagnosi di COVID-19 (tramite RT-PCR) ricoverati presso l’Azienda Ospedaliero-Universitaria Pisana (AOUP) che hanno partecipato al follow-up a 3 mesi dalla dimissione nell’arco temporale da marzo a novembre 2020.
Il follow-up comprendeva esami ematochimici, visita pneumologica, HRCT del torace e LUS. La metodologia ecografica impiegata sia durante la degenza che al follow-up prevedeva l’analisi di 16 spazi permettendo di mappare accuratamente tutte le aree del torace e calcolare uno score ecografico in base all’impegno polmonare sia dal punto di vista qualitativo (segni di interessamento pleurico, interstiziale o pattern consolidativi) che quantitativo (numero di sedi impegnate, con punteggio crescente in base al grado di deareazione polmonare). Un aspetto peculiare è rappresentato dal cosiddetto light-beam che definisce l’alta probabilità di diagnosi di polmonite da SARS-CoV-2.
Risultati. I risultati di questa tesi mostrano che il LUS score medio si riduce in maniera significativa (p 7 (che identifica il 75° percentile) al follow-up sono anche quei pazienti con età media maggiore, degenza maggiore e con comorbilità.
Infine, confrontando i dati LUS con quelli della HRCT del torace abbiamo osservato che il 96% delle HRCT negative corrispondeva ad un LUS ≤ 7, dimostrando un’ottima concordanza fra le due metodiche.
Conclusioni. Il follow-up ecografico a 3 mesi dalla dimissione dei pazienti ricoverati per COVID-19 ha mostrato una risoluzione completa del quadro polmonare in più della metà dei pazienti. L’età avanzata, le comorbilità, la maggior durata della degenza ospedaliera correlano con un peggior LUS score (> 7) al follow-up. Inoltre, è stata osservata la scomparsa dei pattern ecografici tipici della fase acuta quali il light beam e le linee B confluenti. Infine è stata dimostrata una buona concordanza fra i reperti TC e LUS. I risultati di questa tesi suggeriscono che una metodica standardizzata della LUS possa essere di supporto per il follow-up dei pazienti COVID-19, limitando l’utilizzo della TC
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Antidepressant treatment of depressive and anxiety symptoms in patients with Parkinson's disease: a retrospective comparison of TCAs, SNRIs and SSRIs
No full textBackground: Depression and anxiety are highly prevalent non-motor symptoms in patients with Parkinson’s disease (PD), significantly affecting quality of life and disease outcomes. Despite their clinical relevance, evidence comparing the efficacy and tolerability of different antidepressant classes in PD remains limited and inconsistent.
Objective: This study aimed to retrospectively compare the effectiveness and tolerability of three classes of antidepressants, tricyclic antidepressants (TCAs), selective serotonin reuptake inhibitors (SSRIs), and serotonin–norepinephrine reuptake inhibitors (SNRIs), in the treatment of depressive and anxiety symptoms in patients with PD.
Methods: We conducted a naturalistic, observational follow-up study of 29 PD patients with clinically significant depressive and/or anxiety symptoms treated with TCAs (n = 12), SSRIs (n = 9), or SNRIs (n = 8) at the University Hospital of Pisa between February 2020 and February 2025. Clinical assessments were performed at baseline, 3 months, and 12 months using the Clinical Global Impression (CGI) and the Brief Psychiatric Rating Scale (BPRS, depressive/anxiety subscale). Linear mixed-effects models were used to assess changes over time and between treatment groups.
Results: Baseline characteristics were broadly comparable across groups, although patients prescribed SNRIs exhibited later onset of psychiatric symptoms, fewer lifetime depressive episodes and milder symptoms. At 3 months, patients treated with TCAs showed greater symptom improvement than those receiving SSRIs or SNRIs, both on the CGI (trend-level significance, p = 0.08) and BPRS subscale (p < 0.05). By 12 months, depressive/anxiety symptoms improved significantly in all groups, and between-group differences were no longer significant, suggesting convergence of outcomes over time. Adverse effects were reported in 38% of patients overall, with xerostomia and constipation more common with TCAs, somnolence with SSRIs, and tremor with SNRIs; discontinuation rates were low and comparable across groups.
Conclusions: TCAs were more often prescribed to patients with earlier and more severe psychiatric histories and were associated with greater short-term improvement, while SSRIs showed slower response but good tolerability. SNRIs were used mainly in later-onset, milder cases, with intermediate outcomes. Over one year, all antidepressant classes were associated with significant clinical improvement, supporting individualized treatment strategies that balance efficacy, tolerability, and patient characteristics
- …
