1,720,969 research outputs found
La cisti aneurismatica dei mascellari: inquadramento nosologico e presentazione di un caso clinico
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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
Indagine clinico-statistica (1986): su pazienti dell'Istituto di Discipline Odontostomatologiche di Napoli
No full textVariations 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
Treatment of giant intramuscular hemangioma: a multistep approach in three patients
No full textBACKGROUND:
Giant intramuscular hemangioma (GIH) is a rare, progressively enlarging benign tumor, characterized by variable presentation and usually initially diagnosed in childhood. Large volume, rapid enlargement and particular radiologic imaging create suspicion of malignancy. Radiologic investigations and needle or small excisional biopsy are not always reliable for an accurate diagnosis; therefore, histology on a large surgical specimen is often requested. The timing and modality of treatment of these tumors is a matter of debate.
PATIENTS AND METHODS:
Data on 3 patients with GIH of the upper trunk and neck are reported. Associated vascular anomalies were found in all patients. All 3 patients had surgery because of the effect of the growth on their function, the severe symptoms and suspicion of malignancy.
RESULTS:
A one-step excision of an enormous tumor was carried out in one patient, who died from severe postoperative complications. A second patient was successfully treated by a multistep surgical and multidisciplinary approach. An uneventful removal of part of the tumor was performed on the third patient, who is currently in follow-up for completion of treatment.
CONCLUSION:
Surgery remains the most effective mode of treatment for GIH and often results in permanent cure. The authors suggest performing the surgical removal of these tumors at first diagnosis, when their smaller size requires less demanding procedures, presents lower rates of morbidity and offers a better chance of complete excision
Adenocarcinoma of the third and fourth portions of the duodenum: results of surgical treatment.
No full textHYPOTHESIS: To verify the adequacy of duodenal segmentectomy after intestinal derotation in the treatment of primary adenocarcinoma of the third and fourth portions of the duodenum. DESIGN: A retrospective review of the surgical management of patients who underwent derotation of the third and fourth portions of the duodenum was undertaken to determine long-term outcome. SETTING: Departments of surgery in 3 university hospitals. PATIENTS: Between January 1, 1980, and December 31, 2000, 47 patients with primary adenocarcinoma of the third and fourth portions of the duodenum were surgically treated at 3 different institutions. MAIN OUTCOME MEASURES: Details of primary surgery were abstracted from clinical records of the original hospital referral. Postoperative clinical course and long-term outcome were evaluated by a review of the hospital records and follow-up. RESULTS: The results of a barium swallow test series was positive in 38 cases (80.8%) and esophagogastroduodenoscopy was pri..
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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