1,720,959 research outputs found
Corona Mortis: η σύγχρονη προσέγγιση
Get PDFΟ κλασσικός ορισμός της Corona Mortis (Στέμμα του Θανάτου – CM) αφορά την αναστόμωση της θυροειδούς αρτηρίας με την κάτω επιγάστρια αρτηρία που διασχίζει την οπίσθια πλευρά του άνω ηβικού κλάδου. Ο κλινικός αντίκτυπος του αγγειακού αυτού σχηματισμού θεωρείται μεγάλος καθώς εδράζεται στο χειρουργικό πεδίο πολλών ειδικοτήτων (γενικοί χειρουργοί, ορθοπεδικοί, γυναικολόγοι, ουρολόγοι). Η παρούσα εργασία είναι το αποτέλεσμα της σε βάθος μελέτης της βιβλιογραφίας για την CM. Ο σκοπός μας είναι να απεικονίσουμε τα κύρια μοτίβα (αρτηριακά και φλεβικά) της CM, την συχνότητά τους και τις διαφορές μεταξύ των ερευνητών. Σημειώνεται η έλλειψη ομοφωνίας όσον αφορά τον ίδιο τον ορισμό της CM. Φαίνεται ότι απαιτείται μια αναθεώρηση του ορισμού για να βοηθήσει στην προτυποποίηση της μελέτης της οπισθοηβικής περιοχής. Ειδικό βάρος δόθηκε στην πραγματική κλινική σημασία της CM και στις διαφορές στη βιβλιογραφία μεταξύ των σειρών με ασθενείς και αυτών με πτωματικές ημιπύελους. Οι τεχνολογικές εξελίξεις κυρίως με την κατακόρυφη άνοδο του δυναμικού της αξονικής τομογραφίας, παρέχουν στους χειρουργούς πιστές προεγχειρητικές απεικονίσεις της CM (μέσω της αγγειογραφικής μελέτης της CM) και βοηθούν τους επεμβατικούς ακτινολόγους στον έλεγχο αιμορραγιών στα πλαίσια της τραυματιολογίας.Corona mortis (CM) is classically defined as the arterial anastomosis between the obturator artery and the inferior epigastric artery that crosses the posterior aspect of the superior ramus of the symphysis pubis. Its clinical impact is considered great, as it lies within the surgical field of numerous specialties (general surgeons, orthopedists, gynecologists, urologists). The present study is the result of an in depth look on modern bibliography about CM. Our intention is to depict the main patterns (arterial and venous) of CM, their incidence and the differences between researchers. A lack of consensus between writers regarding the definition of the term itself is noted. It seems that a more sufficient definition of CM is needed for the standardization of the study of the retropubic region. Special attention was given to the discrepancies in literature between cadaveric and patient studies as well as to the real clinical impact of CM. The new technological advances and mainly the evolution in computed tomography scanning, provide the surgeons with more precise preoperative depictions of the CM (through the CT angiographic study of CM) and also aid the interventional radiologists in their crucial bleeding control role in the trauma setting
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Get PDFWe 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
Role of the Posterior Fat Pad Sign in Treating Displaced Extension Type Supracondylar Fractures of the Pediatric Elbow Using the Blount Method
No full textThe posterior fat pad sign (PFPS) on the lateral elbow X-ray is useful in the diagnosis of a suspected nondisplaced fracture about the elbow after a subtle injury. However, the presence of a PFPS hallmarks a continuous posterior periosteum-posterior capsule of the distal humerus. This anatomic structure is crucial for the stable anatomic reduction of a displaced extension type supracondylar fracture. Subsequently, the presence of a PFPS may predict the successful nonoperative treatment of a Gartland III-type fracture by means of the Blount method, implying less implant-related morbidity and less intraoperative radiation exposure for the patient and surgeon. Furthermore, it is concluded that a PFPS-positive displaced extension type supracondylar fracture is definitively classified as a Gartland III and not a Gartland IV-type fracture. A retrospective study of 75 displaced extension type supracondylar elbow fractures was performed. All fractures had an initial attempt at a closed reduction under general anesthesia. A stable reduction in 120 degrees of elbow flexion without vascular compromise of the affected limb was achieved in 45 fractures, which were splinted in this position. In the remaining 30 cases, fracture reduction was either inadequate or was achieved with excess elbow flexion, which impaired distal blood flow. These fractures were pinned percutaneously and splinted in 90 degrees of elbow flexion. The two treatment groups were retrospectively compared for the presence of a PFPS. The displaced extension type supracondylar fractures, which were treated successfully by the Blount method, had a statistically significant higher prevalence (chi-square-Yates = 4.91, p<0.05) of a positive PFPS (28/45 patients, 62.22%) compared to the fractures treated by closed reduction and percutaneous pinning (10/30, 33.33%). No vascular complications were observed. The long-term outcome did not differ between groups
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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