1,720,967 research outputs found
Comparison of serum total sialic acid, C-reactive protein, α1-acid glycoprotein and β2-microglobulin in patients with non-malignant bowel diseases
No full textTotal sialic acid (TSA), C-reactive protein (CRP); α1-acid glycoprotein (α1-AG), and β2-microglobulin were determined in 84 patients affected by non-malignant intestinal diseases, Crohn's disease (CD) and ulcerative colitis (UC), active and in remission; non-ulcerative proctosigmoiditis; diverticulosis; diverticulitis (ie, inflammatory complication of diverticulosis). Only in patients with acute phase CD, TSA was statistically higher than those in remission, as well as in controls. In patients with acute CD and in those with diverticulitis, CRP was significantly higher than in the controls. α1-AG was found significantly increased in acute UC and CD patients versus the respective groups in remission, as well as versus controls. Moreover, α1-AG was higher in patients with diverticulitis. β2-microglobulin did not differ in any group of patients. In five patients with CD in acute phase, investigated before and during the pharmacological treatment (5-aminosalycilic acid and steroids), CRP values fell into the normal range after the second week of therapy, whereas TSA values reached the higher limit of the normal range after the third week, except for two CD patients with a larger location (ileocolonic) of the disease. The results are briefly discussed
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
Active Balun Design for Next-Generation Telecom Satellite Frequency Converters
No full textIn this work, we describe the complete design flow of a 1.3–3.3-GHz active balun, exploited to generate a high-voltage swing differential local oscillator (LO) signal driving a highly linear doubly balanced resistive ring mixer. Both the LO active balun and the mixer are integrated into a Ku-band single chip monolithic microwave integrated circuits (MMIC) downconverter for the state-of-the-art telecom satellites. System performance has been maximized designing the different circuits by a holistic approach, which considers a non 50- environment. The experimental validation is carried out by means of an ad hoc time-domain load–pull test bench and shows that the LO active balun provides two quasi-sinusoidal, 180 out-phased, signals with 2.4-V peak-to-peak voltage to the input ports of the mixer over a very high-impedance loading condition
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
Comparison of Electron Device Models Based on Operation-specific Metrics
No full textIn the context of the European Union TARGET Network of Excellence (NoE) a specific interest has been oriented to the comparison of different electron device models in order to choose the most suitable for a particular application (e.g. highly linear amplifiers, low phase noise oscillators). To this purpose different metrics have been defined to compare the models behavior under different operating conditions (i.e. dc, ac small-and large-signal). In this paper we apply different metrics proposed under the TARGET NoE in order to compare two models, the nonlinear discrete convolution (NDC) model, based on a table-based black-box approach, and the EEHEMT1 model, based on the classic equivalent circuit approach. The goal is to provide a set of practical criteria for carrying on reliable model comparisons
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
The determination of plasma transferrin receptor (TfR) in patients with heart valve prosthesis: a useful evaluation of bone‐marrow response to traumatic haemolysis
No full textTHe aims of our research were to investigate the TfR levels in patients with heart valve prosthesis (mechanical or biological); in order a) to compare TfR values with the other well-known indexes of haemolysis -hemoglobn concentration (Hb), reticulocyte count (retics), serum bilirubin, serum lactate dehydrogenanse activity (sLDH), haptoglobin-, and b) to evaluate in such patients the utility of TfR determination as a good index of the erythropoietic response to traumatic haemolysis. On the basis of our preliminary results, we suggest that in patients with heart valve prosthesis, the study of TfR, in association with previously reported indexes, would be useful to estimate if traumatic red cell destruction is completely compensated, as well as to identify underlying desorders of erythropoiesis mostly related to hypoproliferative bone-marrow condition
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