1,720,957 research outputs found
Early osteointegration in “one-step” resection and reconstruction using porous hydroxyapatite custom implants for skull-infiltrating tumors: a monocentric prospective series
No full textBackground: Early reconstruction of the skull represents the gold standard after resection of bone infiltrating cranial tumors. Customized hydroxyapatite porous ceramics are an excellent option for covering skull bone defects. The authors illustrate the surgical technique and investigate the effectiveness of the "one-step" procedure in terms of aesthetic results and early degree of osteointegration. Method: A prospective study was conducted, including all patients operated on for skull bone infiltrating lesions at our center between January 2020 and June 2022. Stereolithography was the technique used for shaping the epoxy-resin model, suitable for both designing the craniotomy and manufacturing the custom-made hydroxyapatite prosthesis. Clinical outcome, results of early (6-week) and late (3-month) osteointegration evaluated on CT and MRI, and level of patient satisfaction measured by the FACE-Q questionnaire were reported. Results: Fourteen patients (13 adults and a 7-year-old boy) and a total of 15 implants were included. The average percentage of early osteointegration calculated at the edge of the prosthesis, was 72.2%, that increased to 82.6% after 3 months. Patient-reported outcomes indicated a high level of satisfaction across all patients. Conclusions: "One-step" resection and reconstruction using customized hydroxyapatite porous implants for treatment of skull infiltrating tumors is a safe, simple and effective technique, in particular when the bone defect is large. Bone regeneration around and inside the prosthesis seems to start early after surgery
Management of intracranial and orbital complications of acute rhinosinusitis and acute otitis media in the post covid-19 era in pediatric patients
No full textPurpose: Acute bacterial rhinosinusitis (ABRS) and acute otitis media (AOM) are common diseases in pediatric populations that rarely lead to intracranial infection and/or orbital complications. The incidence of these complications has increased in recent years and the main aim of this study is to analyze the tendency of this increase during the pandemic years, compared with the pre-pandemic era and to propose our management of ABRS and AOM. Method: Clinical data from children, admitted to our hospital during the period from January 2018 to March 2024 with a diagnosis of complicated ABRS and AOM was collected. The sample was divided into two groups: Group A (January 2018– December 2020) and Group B (January 2021- March 2024). Results: The retrospective cohort consisted of 35 patients, seven patients (20%) belong to Group A, twenty-eight patients (80%) belong to Group B. 67.9% of subjects during the COVID-19 era tested positive for SARS CoV-2 infection on average 5.5 months prior to hospital admission. Statistical analysis showed that there was a sharp increase in surgical cases of complicated AOM and complicated ABRS, after the lock-down period, compared to the previous years. Conclusion: The main findings of the present study are the significant increase of complicated ABRS and AOM as well as severe complications requiring surgical treatment, after the COVID-19 pandemic
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
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
Postoperative Impact of Pontocerebellar Angle Surgery on the Quality of Life in Patients with Vestibular Schwannoma
Full text linkBackground: Vestibular Schwannomas are benign tumors arising from the VIII CN. Surgical treatment is indicated in case of tumors larger than 2.5 cm in the cerebellopontine angle or in the case of cranial nerve dysfunction. The aim of the present study was to evaluate the QoL by means of the PANQOL questionnaire in a group of surgically treated patients mainly affected by large and giant VS Methods: All patients underwent preoperative and postoperative otoneurological evaluation and gadolinium enhanced MRI and they completed, independently, the PANQOL questionnaire at last follow up. Results: 70% of patients presented with large Koos III or IV VS Each domain of PANQOL showed a strong correlation with the total PANQOL score. In relation to the postoperative facial nerve function, patients with poorer function showed significantly lower score in the facial dysfunction and pain, patients with postoperative balance problems showed a significantly lower PANQOL score for domains of balance and pain. Conclusions: This study showed that postoperative QoL of patients was acceptable even if there were some domains that were more affected, such as hearing and balance domains; therefore, the lowest scores suggest the need for vestibular rehabilitation programs and strategies that improve postoperative hearing
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