1,721,103 research outputs found
Atropine sulfate for treatment of bradycardia in a patient with morbid obesity: what may happen when you least expect it.
No full textA 74-year-old morbidly obese man was scheduled for surgical repair of an incisional ventral hernia. Anaesthesia was induced with propofol and fentanyl, and maintained with desflurane. A second dose of fentanyl 0.2 mg, given before starting surgery, resulted in sinus bradycardia and mild decrease of arterial blood pressure. Atropine sulfate 0.5 mg was administered. One minute later, the ECG rhythm on the monitor changed to third degree atrioventricular block with a ventricular response rate of 40 beats/min associated with marked hypotension. Isoproterenol 0.02 mg reverted the atrioventricular block to sinus rhythm. Cardiac enzymes and ECG ruled out acute myocardial ischaemia. The surgical procedure and the recovery from anaesthesia were uneventful. The patient was discharged from the hospital on the fifth postoperative day. For the treatment of bradycardia atropine sulfate should be adjusted at least to lean body weight in order to avoid paradoxical heart rate response in patients with obesity
An approach to the identification of fine sediments by Induced Polarization laboratory measurements
No full textTime‐domain‐induced polarization (IP) laboratory measurements were performed on about 200 fine sediment samples with varying water content. The results permitted an analysis of IP properties of clays, loams, silts, and sands. Particular emphasis has been given to the analysis of the chargeability m as a function of lithotype and the water content. By analyzing decay curves, a new parameter was identified. It is a statistically specific characteristic of the lithotype and is independent of the water content. Therefore, it provides a diagnostic parameter for lithotype identification. In association with the values of chargeability and electrical resistivity, this parameter permits a reliable evaluation of water content and yields useful information about the porosity and permeability of the lithotype. Copyright © 1982, Wiley Blackwell. All rights reserve
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
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
Variabilità nel ricorso alla laparoscopianell’intervento di appendicectomia
No full textOBIETTIVI: La variabilità clinica rappresenta un fenomeno estremamente
complesso legato da un lato all’erogatore, disponibilità di nuove opzioni
terapeutiche e scelte del singolo professionista, talora condizionato da richieste
sempre più specifiche da parte dell’utenza. Questo lavoro ha l’obiettivo di
dimensionare la variabilità intraregionale nel ricorso all’appendicectomia e
nell’esecuzione laparoscopica della stessa nell’ambito della Regione Veneto.
MATERIALI: Avvalendosi dell’archivio regionale informatizzato SDO, riferito al
periodo 2000-2008, è stato calcolato il tasso di appendicectomia (TA) di area,
espresso per 100.000 ab./anno, in riferimento alle singole aziende sanitarie
territoriali (n. 21), considerando ciascuna di esse come singola unità dell’indagine
indipendentemente dal numero di assistiti, mediamente 230.111 ± 105.127
(range: 74.813 – 466.132) e, per la numerosità estremamente diversificata
sono state incluse nell’analisi solo le 19 aziende con più di 100.000 assistiti. La
stessa variabilità è stata inoltre considerata in termini di macroaree, aggregando
le aziende per le 7 province, 669.119 ± 302.049 residenti (range: 211.843 –
880.339). il TA di area va considerato come un indicatore proxy del fenomeno
poiché non considera il ricorso alla mobilità, né interregionale né intraregionale,
contrariamente al TA di popolazione calcolato sulla popolazione residente.
RIASSUNTO: Il campione era costituito da 38.314 interventi di appendicectomia,
con un TA di popolazione complessivamente pari a 90,9; per quanto concerne
la variabilità intraregionale, la stratificazione del campione per singola azienda
ha evidenziato un TA mediamente pari a 94,2 ± 16 (range: 74 - 128,6) con un
ricorso alla tecnica laparoscopica del 28% ± 15,8% (range: 4,8% - 53,9%),
attestatosi al di sopra del 50% in 4 delle 19 aziende considerate ma inferiore
al 20% in 10 di esse. Dall’aggregazione per macroaree provinciali, includendo
nell’analisi tutte le aziende, si è assistito a una riduzione della variabilità
rispetto all’analisi per singola azienda, sia del TA, 90,2 ± 13,8 (range 74,4 -
116,1), che del ricorso alla laparoscopia, 25% ± 10,6% (16 - 44%). Da segnalare
infine che dall’analisi della distribuzione dei TA, sia a livello di singola azienda
che su base provinciale, non è emersa alcuna correlazione con la percentuale
di interventi effettuati per via laparoscopica.
CONCLUSIONI: L’analisi, oltre a una variabilità contenuta e in linea alla
letteratura nel ricorso all’appendicectomia, ha evidenziato un quadro della
diffusione della tecnica laparoscopica piuttosto disomogeneo con una variabilità
plausibilmente riconducibile alle differenti competenze degli operatori in ambito
laparoscopico
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