1,720,957 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
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
Bi-lateral pneumothorax after orthognatic surgery.
No full textSurgical problems as consequences of orthognatic surgery can be: upper airway impairment, hemorrage, infections, mobility of the splitted bones, nervous lesions. It is extremely rare to observe sub-cutaneous henfisema in association to bi-lateral pneumothorax. A 28 yrs. female, clinical history and instrumental evaluation negative for metabolic andclinical pathologies. She was treated with a Le Fort I osteotomy and BSSO sec. Gotte. Pre-surgical difficulties of the endonasal intubation with consequent bleeding. Intrasurgical left bleeding diring BSSO from the retromolas venous vessel.lntermaxillary fixation. The patient was transfered in Intensive Care Unit for 24 hours. Back to our Department at 12.00 am clinically well stabilized. At 4 pm sudden dispnea associated
to moderate henfisema of the cheek and periorbital area. At 6 pm severe and sudden decrease of arterious saturation, patient conffused, increase of the henfisema that is now extended to the neck and the upper third of the anterior thorax. Immediate tranfer to the intensive care unit. Removal of IMF, oral intubation, a thorax xray shows right tension pneumothorax, that is treated with an intercostal drain. A thorax xray after 4 hours and a TC show a controlateral pneumothorax. This is treated with an intercostal drain. Both drainages are kept in site for 18 days. No further consequences.
No neurological sequelae, no infections, no other osteotomies sequelae. Thorax henfisema after orthognatic sugery is extremely rare and is reported as a progression of high pressure air penetration through the deep fascia of the neck. So for tension pneumothorax complicated with a bi-lateral pneumothorax that was secondary to the henfisema. Sudden post-surgical dispnea associated to sub-cutaneous henfisema of the neck and of the thorax must be adequately observed with the aim of monitoring further severe sequelae. The anaesthetic management of the emergency difficult airway in any post-surgical orthognatic treatment can be extremely difficult requiring a carefully planned multi-disciplinary approach
I biomateriali per la rigenerazione ossea - Parte II
No full textDalle prime esperienze di Boyne, la rigenrazione ossea guidata (GBR) è diventata metodica indicata per la riabilitazione implantare nelle aree edentule ed atrofiche. Su questo fronte il continuo impegno di clinici, ricercatori ed industrie specializzate ha contribuito allo sviluppo di biomateriali e metodiche operative che forniscono al paziente standard elevati di qualità ed affidabilità dei processi produttivi
Tumore a cellule granulose e carcinoma squamoso del cavo orale: una diagnosi differenziale difficile
No full text
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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