1,354,058 research outputs found
3 Tesla magnetic resonance spectroscopy: Cerebral gliomas vs. metastatic brain tumors. Our experience and review of the literature
No full textGoing Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Comparison Between Gleason Score and Apparent Diffusion Coefficient Obtained from Diffusion-Weighted Imaging of Prostate Cancer Patients
No full textObjectives: To correlate the apparent diffusion coefficient (ADC) of prostate cancer patients with pathological Gleason scores (GS). Methods: 40 patients with GS 2 + 3, 3 + 3, 3 + 4, or 4 + 4 were selected. The magnetic resonance imaging (MRI) study was performed adding axial diffusion-weighted imaging (DWI) sequences to the standard MRI protocol. ADC values obtained were correlated with the GS data. Results: Statistically significant differences of ADC (p < .05) were found among GS groups with a trend of decreasing ADC values with increasing GS. Conclusions: The ADC values may help clinicians to delineate prostate carcinoma, recognizing its high- or low-grade compartments
Variations on the Author
No full text“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
No full textWe 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
No full textWe 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
An injectable, degradable hydrogel plug for tracheal occlusion in congenital diaphragmatic hernia (CDH)
No full textCongenital Diaphragmatic Hernia (CDH) is a birth defect characterized by failed closure of diaphragm, herniation of viscera in the thoracic cavity and impaired lung development. In most severe cases, fetoscopic endoluminal tracheal occlusion (FETO) is performed through a catheter-mounted balloon to contain pulmonary hypoplasia. To support the success rate of FETO and overcome some of the associated drawbacks, this work aimed at finding an injectable, degradable substitute for the balloon not requiring prenatal removal. Two different types of gels were evaluated as tracheal plugs: calcium-alginate and hyaluronan/methylcellulose blends (HA-MC). The effect of composition on hydrogel properties was evaluated, to identify formulations meeting design requirements. Anatomical tracheal casts were fabricated and filled with a simulated lung fluid to assess injectability, cohesiveness, sealing pressure and persistence of plugs. In vitro cytotoxicity and adhesion of mouse fibroblasts on hydrogels were also investigated. For both hydrogels, adjusting formulation enabled to obtain gelation time within the design range. Furthermore, when injected in the tracheal model, good cohesion and capability to adapt to the anatomical shape were also observed. Effective sealing up to 80 cm H 2 0 was reached for selected compositions and was maintained for over 4 weeks in the in vitro model. Swelling and weight loss were also strongly influenced by composition and varied from few days to several weeks. Despite the absence of in vitro cytotoxicity, a favourably low cell-adhesion was observed for both hydrogels. However, due to their shear-thinning behaviour, HA-MC blends appeared as a particularly suitable candidate for single-surgery tracheal occlusion
Author, publisher and bookseller : a tripartite synergy in Nigerian book industry
No full textThis work is about the roles of Author, Publisher and Bookseller in Book development in
Nigeria. The paper started by delving into the history of Book Publishing in Nigeria after
which it proceeded by defining who an author, a publisher, and a bookseller is and
expatiated on the indispensable roles of these key actors in Nigerian Book Industry and in
the emerging Information Society. Furthermore, the various constraints to book
development were identified while the paper advised on how the Book Industry can be
further promoted in Nigeria. However, the paper concluded and made recommendations
on how the Book sector can help in enhancing scholarship in the country
The Thursday Murder Club: Launching a megabrand author - a publishing case study
No full textIn 2020, the Christmas book charts in the UK made headlines: Barack Obama’s eagerly awaited autobiography, The Promised Land, was beaten to the top spot by The Thursday Murder Club by Richard Osman, a debut cosy crime novel set in a retirement village. Not only did Osman’s book beat the former US president’s expected bestseller, it also broke records, becoming the fastest-selling debut crime novel of all time. Although Osman has a certain level of fame in the UK from his TV appearances on shows such as Pointless, his celebrity status does not entirely explain the novel’s huge sales. This article tracks the acquisition, publication, and promotion journey of The Thursday Murder Club in order to understand the industry and cultural context of its success and to interrogate the role of celebrity in the creation of author brands. The findings suggest that the unexpected scale of the success of the book owed to a number of factors, including in-depth editing by the novel’s agent, editor, and author to tighten up the plot, an extensive and strategic promotional campaign, the pandemic (which drove interest in the book’s genre and themes), and the quality of the writing. We find that the book’s success was accentuated by Osman’s celebrity status rather than being entirely reliant on it. This research adds to the growing scholarship on celebrity authorship by means of an in-depth case study and provides insight into the processes behind publishing a ‘celebrity’ book and launching a megabrand author
Percutaneous Computed Tomography-Guided Lung Biopsies using a Virtual Navigation Guidance: Our Experience
No full textObjective: To evaluate the effectiveness of a virtual CT-guided navigation system (Sirio-
MASMEC Biomed) in performing lung biopsies, with greater attention to lesions smaller
than 1 cm, compared to the traditional procedure. Methods: This study was approved by
the Ethics Committee of our Institute. Two hundred patients were prospectively selected. Of
these, 100 were subjected to percutaneous procedure with the use of Sirio and 100 to traditional
CT-guided percutaneous procedure. The two methods were compared in terms of
absorbed dose, procedure time, complications, and number of non-diagnostic specimens
(diagnostic success). Results: Sirio has shown a significant reduction in the absorbed dose
and procedure times (p<0.05), with a lower incidence of complications compared to the
traditional procedure. Sirio has also allowed to carry out biopsies of lesions’ diameter
!10 mm, obtaining fewer non diagnostic specimens thus resulting more effective in terms
of diagnostic success. Conclusions: The use of Sirio in sampling biopsy showed a statistically
significant reduction in terms of performed scans and procedural time with lower incidence
of post-procedural complications compared to the traditional percutaneous
procedure, especially for lesions !10mm. The best diagnostic result, the reduction of the
dose absorbed and procedural complications makes the procedures more reliable, safety
and less invasive. In addition, the reduction of execution time will increase the number of
daily interventional procedures improving clinical management
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