1,720,956 research outputs found
[Duplex scanner in the diagnosis of vasculogenic impotence].
No full textThis paper is reporting the experience of the Authors in the use of Duplex-scanner and eco-color-doppler in the diagnosis of the erectile dysfunctions and particularly in the importance of vascular (arterious and venous) origin. For this purpose, we selected a sample constituted of 41 patients: 22 with psychogenic, 8 with arterial, 5 with venous impotence, 5 patients with Peyronie's disease and 1 patient with posttraumatic arterio-venous fistula. The Authors, while underlining the remarkable accuracy and diagnostic reliability of eco-doppler, emphasize the indication of the method up to consider it "investigation of prime choice", not only in the patients with the dysfunction of vis erigendi but, in the cases in which a morphological evaluation, besides hemodynamical one, become necessary
[Does the neurologic assessment have a decisive role in the early diagnosis of urinary disorders of uncertain etiology? A case of spinal chordoma].
No full textThe Authors report a rare case of detrusor areflexia due to a sacral column chordoma characterized as initial symptomatology, by dysuria and recurrent urinary tract infections. The patient was treated for a long time in a symptomatic way by her physicians. The Authors while discussing the case, underline the importance of an accurate differential diagnostical framing in patients with voiding and/or anorectal dysfunctions of uncertain nature. This framing must exclude those voiding pathologies of neurological origin which are frequently evinced merely by an aspecific voiding symptomatology of dysuric or irritative nature
[The role of trans-rectal echography (TRE) in the evaluation and staging of bladder tumors: comparison with suprapubic echography and computerized axial tomography (CAT)].
No full textTAU and CT are, after cystoscopy, the two most largely used methods in the diagnosis and the staging of the bladder tumors. TRUS is mostly used in the pathologies of the prostate and the seminal vesicles. 38 patients (34 M and 4 F) suffering from bladder cancer are included in this study in the period from July 1995 to January 1997. They are evaluated with TAU, TRUS and CT in order to evaluate the sensitivity and the specificity of TRUS in the diagnosis and the stadiation of bladder tumors. The patients included in this study are divided in two subgroups as patients having superficial and infiltrating tumors according to pathologic stage after TURB or radical cystoprostatectomy. Specificity and sensitivity values, overstaging and undestaging rates are calculated for each group. In the superficial tumors, TAU had a sensitivity and specificity of 72.2%, while with CT these values were respectively 70% and 75%; in the infiltrating tumors, TAU presented sensitivity of 65% and specificity of 70% while CT presented respectively 72.2% and 77.5%. With TRUS these values were 88.8% and 94.4% in the superficial tumors and 90% and 95% in the infiltrating tumors. The method with the highest overstaging rate was CT with 33.3% while the ones with the highest understaging rates were TAU and CT with 22.2%. The sensitivity with TRUS was 100% in a total of 29 infiltrating and superficial tumors of the trigone while it was only 55.5% in the tumors of the lateral walls and the dome. With TAU these values were respectively 82.7% and 22.2%, with CT respectively 79.3% and 44.4%. The specificity with TRUS was 100% for the tumors of the lateral walls and 77.7% of the dome; with TAU these values were respectively 75.8% and 55.5% with CT 75.8% and 77.7%. In conclusion, TRUS may be used with a high sensitivity and specificity in the diagnosis and the stadiation of infiltrating and superficial bladder tumors situated at the peritrigonal zone and in the diagnosis of tumors situated in other regions of the bladder
Il ruolo dell’ecografia trans-rettale (ETR) nella valutazione: confronto con ecografia sovrapubica e tomografia assiale computerizzata (TAC) e stadiazione dei tumori vescicali.
No full text
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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