1,720,958 research outputs found
UNCONJUGATED AND CONJUGATED BILIRUBIN PIGMENTS DURING PERINATAL-DEVELOPMENT .3. STUDIES ON SERUM OF BREAST-FED AND FORMULA-FED NEONATES
No full textSindrome di Robinow: descrizione di un altro caso italiano. 7 casi su 36 sono italiani. Perché?
No full textDopo la s egnalazione di Robinow e coll . nel 1 969 di
una sindrome malformativa caratterizzata da dismorfismo
facciale, nanismo mesomelico e ipogenitalismo, sono state
descritte in letteratura altre 24 famiglie dii cui 6 italiane per un totale di 35 affetti.
Scopo del presente lavoro è presentare un caso giunto
alla nostra osservazione, discutere la variabilità del quadro fenotipico e la modalità di trasmissione della sindrome, e formulare delle ipotesi sulla alta prevalenza della sindrome in Italia
Urinary beta-2-microglobulin excretion in prematures with respiratory distress syndrome.
No full textUrinary concentrations of beta 2-microglobulin (beta 2M) were studied in 25 prematures (less than or equal to 35 weeks) with respiratory distress syndrome (RDS), divided into two groups (group 1: ventilation greater than or equal to 2 days; group 2: oxygenotherapy less than or equal to 4 days), to assess the value of beta 2M in the detection of tubular damage in relation to the severity and management of the respiratory disease. The data were compared with those obtained from 10 healthy controls, matched for birth weight and gestational age. Measurements of beta 2M were made on urine collected on days 1, 3, and 5 until the recovery phase of RDS was reached. Urinary beta 2M values for infants with RDS were increased on days 1 and 3, with respect to the controls, and significantly increased in the ventilated group (8,814 +/- 4,768 vs. 2,594 +/- 3,231 micrograms/l, p less than 0.005 and 7,624 +/- 6,264 vs. 2,762 +/- 2,316 micrograms/l, p less than 0.05, respectively). Serum sodium and creatinine, creatinine clearance, fractional tubular sodium excretion and renal function index on day 1 were similar in prematures with or without RDS. However, the ventilated newborns presented higher urinary sodium excretions. On the 5th day, no significant differences in urinary beta 2M were found among the groups. The elevated levels of urinary beta 2M in the acute phase of RDS and in the more severe lung disease indicate the existence of subclinical tubular dysfunction, probably secondary to hypoxic stress and to negative hemodynamic effects of ventilatory management
Attendibilità diagnostica dell'ecografia fetale nella diagnosi prenatale di uropatia malformativa
No full textMilano (ITALY),198
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
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