1,720,976 research outputs found
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
Female pelvic organ prolapse: Baseline and post-operative evaluation using dynamic MRI
No full textPurpose: We have investigated the possible use of dynamic MR imaging in the baseline and post-operative evaluation of female urinary incontinence and genital prolapse.
Material and Methods: From Jan. 2001 to Sept. 2002, 32 female patients with a diagnosis of genuine stress urinary incontinence associated with various degrees of genital prolapse were investigated using dynamic MR imaging. The examinations were performed using a Philips Intera system operating at 1.5T. Patients were placed in a dorsal position with the legs slightly flexed and abducted. Two-hundred and fifty ml of Gd-DTPA water solution (0.3%) were instilled in the bladder. Twenty ml of Gadolinium water-gel solution (0.3%) were injected in the vagina and 50 ml in the rectum. Dynamic images were obtained in resting conditions and during Valsalva manoeuvre using T1 FFE sequences (FOV 250-300 mm, thickness 3 mm) in the sagittal plane.
Results: Dynamic imaging provided in all cases good demonstration of genital prolapse during Valsalva manoeuvre; a good correlation, in the baseline and after surgical treatment, between clinical diagnosis of genital prolapse type and degree obtained at physical examination versus MRI was found.
Conclusion: In our opinion quantification of genital prolapse using dynamic MRI may be of value in surgical planning and post-surgical follow–up
STENT URETERALE CON ANIMA METALLICA SPIRALIFORME: SICUREZZA IN RISONANZA MAGNETICA NUCLEARE
No full textVariations 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
Stadiazione e ristadiazione dei sarcomi dei tessuti molli mediante Risonanza Magnetica. Valutazione dell’utilità del mezzo di contrasto
No full text
Dynamic MRI in the assessment of female pelvic organ prolapse: Baseline and post-surgical evaluation
No full textLearning Objectives: To assess the diagnostic role of MRI in the evaluation of female urinary incontinence and pelvic organ prolapse using dynamic MRI, as a baseline assessment and after surgery using “Patch and Plug” technique.
Background: Dynamic MRI examination of pelvic prolapse is a good aid in the evaluation of both the type and degree of the female pelvic organ prolapse, representing a diagnostic confirmation of the clinical assessment. It is also useful to demonstrate prolapse has disappeared after surgery. MRI provides a complete evaluation of the pelvic organs by both static and dynamic imaging; it may also allow evaluation of the muscular and ligamentous structures of the pelvic floor.
Procedure Details: 44 patients with genuine stress urinary incontinence and genital prolapse were investigated by standard and dynamic MRI, using a 1.5Tunit. Patients were placed in a supine position with the legs slightly flexed and abducted; 250ml of Gd-DTPA water solution were instilled into the bladder, 20ml of Gd water-gel solution was injected into the vagina and 50ml into the rectum. Dynamic images were obtained at rest and during Valsalva manoeuvre, using T1-FFE sequences on sagittal plane. Dynamic MRI was analyzed to determine the presence and extent of cystocele and vaginal vault prolapse.
Conclusion: Dynamic MRI provided a good demonstration of genital prolapse during Valsalva manoeuvre in all cases; a good correlation with the clinical evaluation of both genital prolapse type and degree was found in the baseline assessment and after surgery
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