1,720,965 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
Aneurysmal bone cyst: effective nonsurgical treatment based on embolization, percutaneous alcoholization and injection of liquid hydroxyapatite
No full textAneurysmal bone cysts (ABCs) are rare and poorly understood bony lesions. ABCs are intensely vascularized by both high flow vessels and low flow “vascular lakes”.Owing to this features treating an ABC can often be difficult and perilous since abrupt hemorrhages can occur. Besides, enucleation or courettage are frequently blemished by local recurrence.Resection with reconstruction (often after previous embolization) is an option that yields higher cure rate but at the price of disfigurement or donor site morbidity.Here we report a preliminary analysis of a new technique that consist on endovascular embolization followed by percutaneous alcoholization and obliteration by injecting liquid hydroxylapathite into the vascular chambers. Two patients, who were previously treated with conservative surgical removal of mandibular ABC, presented with vast recurrences.Under general anesthesia an endovascular procedure was undertaken. Here facial and inferior alveolar arteries were closed by means of
cyanoacrilic glue. Then by percutaneous direct puncture the remaining “vascular lakes” were injected with absolute alcohol. Ten minutes after, when a fluoroscopic examination demonstrated no contrast leakage, liquid hydroxylapathite was injected into the chambers.No perioperative complications were recorded.Six months after the procedure no disease relapse was detectable.5 more patients with ABC outside the facial skeleton were treated with the same technique.Endovascular treatment followed by percutaneous injection of calcium hydroxylapathite seems to be a valid alternative to safely and conservatively manage ABCs.However longer follow up and higher number of treated patients are needed to deem this approach superior to the “standard” resection
Surgical management of the painful lesions of the inferior alveolar nerve
No full textOral and dental surgery procedure, more often implant placement or inferior third molarextractions, may result in inferior alveolar nerve (IAN) injuries, which are being reported with growing frequency. Nerve damage can also follow orthognathic, pre-prosthetic and salivary gland surgery, or resection of tumors, either benign or malignant. Endodontic treatment and local anaesthetic injections can also result in nerve lesion, which can reduce quality of life by affecting speech, chewing and social interaction.Patients may report either total anaesthesia or hypaesthesia. In case of associated neuropathic pain, prompt treatment is pivotal in order to prevent chronic and irreversible nerve damage. Between 2007 and 2015, 21 patients with pain in the area supplied by the IAN were referred to the Maxillo-Facial Surgery Department of San Paolo Hospital (Milan, Italy). All IAN injuries followed endodontic treatment or oral or maxillofacial surgery. All patients were treated by means of tailored IAN
microsurgery. Most of patients affected by pain before surgery experienced complete or partial amelioration of symptoms. In 78.94% of cases, a significant increase in nerve function was observed.According to our data, interpositional nerve grafting represents the optimal method of reconstructing an injured IAN; pain relief and partial recovery of sensation were observed in all patients who underwent this procedure.Scar releasing, nerve decompression and nerve substitution using vein grafts are less effective. Removal of endodontic material extravasated into the mandibular canal or removal or retraction of the implant from the mandibular canal is mandatory and effective in patients experiencing severe pain
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
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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