1,720,955 research outputs found
Preoperative and postoperative monitoring of the patients with severe internal carotid artery stenosis [Monitoraggio pre e post operatorio dei pazienti con stenosi carotidea critica]
No full textThe Authors develop a clinical trial to monitoring the patients with severe internal carotid artery (ICA) stenosis before and after the surgical procedure of thromboendarterectomy (TEA). Preoperative evaluation selects the patients giving hemodynamic information to optimize the surgical indications and defining postoperative prognosis of the patients. Preoperative data include brain CT scan, cardiologic and TSA color coded ultrasonography evaluation (energy color-Doppler) to define morphological characteristics and exact percentage of carotid artery stenosis, transcranial color imaging (TCI) for intracranial vessels (communicating arteries), blood flow velocity and vasogenic reserve. Clinical and technical hemodynamic data are related to cerebral and TSA digital angiography and surgical indications. Intraoperative monitoring is obtained evaluating the residual pressure in ICA after clamping the common carotid artery and transcranial cerebral oximetry. Postoperative monitoring of patients include TSA and transcranial evaluation one, three and six months after surgery. The Authors related clinical characteristics of five patients with ICA stenosis: in some patients bilateral stenosis is present with hemodynamic blood support of cerebral posterior circulation. In this trial the most important data is the lost of cerebral vasogenic reserve also in the other contralateral side in the most severe ICA stenosis. Postoperative recovery of cerebral vasogenic reserve has been good in four patients; in the last patient a further examination after a longer interval of time has been requested. The surgical results has been good in all the cases, without any complications
Post-traumatic epidural cervical abscess (Escherichia coli) [Ascesso cervicale epidurale post-traumatico da Escherichia coli e revisione della casistica]
No full textAbscess formation in the spinal epidural space is a rare lesion. Despite modern medical advances, the morbidity and mortality rates asseciated with spinal epidural abscess remain significant, and the diagnosis is often elusive. Post-traumatic epidural abscess of the cervical spine is reported in a 51 year old man. RM imaging of the spinal cord allowed for prompt diagnosis. At the operation the culture of the abscess drainage grew Escherichia Coli
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
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
- …
