1,720,976 research outputs found
Exaggerated glucagon secretion in diabetic and non-diabetic subjects with surgical porto-caval anastomosis
No full textPancreatic glucagon (IRG) levels in the postabsorptive (fasting) state and in response to arginine test (ATT), have been investigated in 17 subjects with porto-caval anastomosis (PCA). Out of these, seven subjects were insulin-treated diabetics, 5 were untreated diabetics, and 5 had no evidence of clinical diabetes. Basal and stimulated IRG values in the overall group of PCA subjects were significantly increased in comparison to 14 normal controls. No significant difference was found between the three groups of patients in respect to IRG values. The mean fasting IRG levels, grouped in relation to the age of shunt, were significantly raised six months after surgery. In addition no significant difference in IRG values (fasting or stimulated) was observed in relation to the entity of the liver disease (child degree) or to the type of surgical shunt. Finally, when PCA patients with or without encephalopathy were considered, fasting and peak IRG values were significantly increased in those patients with encephalopathy
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
Visual evoked potentials in infants of diabetic mothers: Relations to clinical and metabolic status during pregnancy and delivery
No full textObjective: To evaluate Visual Evoked Potentials (VEPS) and psychomotor development of infants of diabetic mothers (IDMs) in relation to clinical and metabolic data during pregnancy and delivery. Methods: VEPs and psychomotor development (Brunet-Lezine) were analysed in 40 two-month-old IDMs (21 males, 19 females), 24 from mothers with type-1 diabetes, 13 gestational diabetes, and 3 type-2 diabetes. Normative VEP data were obtained from 63 age matched controls. Results: VEP latencies were significantly longer in IDMs than in controls (O1 wave IV 197.9 +/- 35.5 vs 155.3 +/- 30.3; P < 0.001 : O2 wave IV = 200.2 +/- 33.8 vs 155,6 +/- 29.0; P < 0.001). The mean developmental quotient was normal. In IDMs with type-1 diabetes delayed VEPs were related to increased weight during pregnancy (r 0.516; P 0.009), 1st trimester fasting blood glucose (r 0.458: P 0.037), insulin requirement during the 2nd (r 0.441; P 0.035) and 3rd trimester (r 0.422: P 0.039); in IDMs with gestational diabetes, VEP latency showed negative relation to Apgar scores (r -0.748; P 0.008). Conclusions: IDMs have delayed VEPs, which may possibly be related to poor metabolic control in pregestational diabetes, and to delivery complications in gestational diabetes. Significance: IDMS show subtle neurophysiologic changes detectable by VEPs. 2009 International Federation of Clinical Neurophysiology. Published by Elsevier Ireland Ltd. All rights reserved
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
INCREASED SERUM ALDOSTERONE IN DIABETIC PREGNANCY
No full textSerum levels of aldosterone and cortisol were measured by radioimmunoassay in 15 patients with gestational diabetes, in 18 patients with Type 1 (insulin-dependent) diabetes, in 36 pregnant control women and in 10 non-pregnant control women. All subjects, on habitual sodium and potassium intake, were sampled in a supine position at 09.00 hours. Pregnant women were examined twice, during gestational week 32-34 and at delivery. Serum levels of aldosterone and cortisol were also measured in the umbilical cord blood of newborn babies of these diabetic and non-diabetic mothers. Serum levels of aldosterone in both gestational and Type 1 pregnant diabetic women were found to be consistently above the reference values of non-diabetic pregnant women. Abnormal serum levels of aldosterone were also observed in newborn infants of diabetic mothers. In contrast, serum levels of cortisol were not increased. © 1987 Springer-Verlag
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
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