1,720,994 research outputs found
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
A Severe Inactivating PTH/PTHrP Signaling Disorder Type 2 in a Patient Carrying a Novel Large Deletion of the GNAS Gene : A Case Report and Review of the Literature
No full textPurpose: Pseudohypoparathyroidism (PHP), characterized by multihormone resistance and Albright's hereditary osteodystrophy (AHO), is caused by GNAS mutations. Whole or partial gene deletions are rare. All disorders due to inactivating mutations of the GNAS gene are now classified as "inactivating PTH/PTHrP signaling disorder type 2" (iPPSD2). This study reports a family harboring a large GNAS gene deletion in order to improve the knowledge of genotype-phenotype correlation of this disease.
Methods: An 18-year-old man with severe diffuse soft ossifications and multihormone resistance underwent to clinical, biochemical, radiological, and genetic studies. A review of the literature of other cases of iPPSD2 due to GNAS large deletions was performed focusing on clinical and biochemical features.
Results: The proband presented signs of hypocalcemia and marked AHO features. Laboratory tests revealed hypocalcemia, high levels of serum phosphate, PTH, TSH, and calcitonin despite therapy with calcium carbonate, calcitriol, and levothyroxine. Diffuse soft tissue ossifications and brain calcifications were shown by radiological exams. Family history was remarkable for hypocalcemia, neurocognitive impairment, and cerebral calcifications in his brother and AHO features in the maternal grandfather. The proband's mother showed short stature, whereas physical examination of the father was unremarkable. Genetic analysis of the GNAS gene revealed an unreported large deletion encompassing exons 1-7 in the proband, brother, and mother. By reviewing the literature, only six other cases were described.
Conclusions: We report a kindred harboring a large GNAS deletion. A genotype-phenotype correlation was observed in term of severity of tissue ossifications in the siblings but not in the mother
Outcome of 309 patients with metastatic differentiated thyroid carcinoma treated with radioiodine
No full textAbstract
From 1969 to 1990 there were 309 patients with differentiated thyroid carcinoma (241 papillary and 68 follicular) treated with radioactive iodine for functioning node metastases alone (n = 191) or distant metastases (n = 118) with or without node metastases. These patients represented 32.7% of 945 patients treated in our institution during the same period. Initial treatment included near-total thyroidectomy and 131I ablation of postsurgical thyroid residue, followed by L-thyroxine suppressive therapy. At the end of follow-up (mean 5.8 years), 146 patients (76.4%) in the group with nodal metastases were considered cured, as assessed by clinical and laboratory evaluation including whole body scan (WBS) and serum thyroglobulin (Tg) levels; 32 patients (16.7%) had persistent disease. Loss of 131I uptake in persistent metastatic lesions occurred in five patients (2.6%), and newly developed distant metastases occurred in eight patients (4.2%). Of the patients with distant metastases, 36.4% were cured by 131I. Distant metastases from papillary carcinomas had a higher cure rate than follicular carcinomas (p < 0.01). The metastases of four patients (5.2%) lost the property to take up radioiodine. Lung and bone metastases detectable by WBS but not by radiography were most likely to be cured by 131I. The overall survival at the end of follow-up was 95.8% in patients with only lymph node metastases and 76.0% in those with distant metastases. Tumor-related deaths were 3.6% and 23.7%, respectively. Our data indicate that 131I therapy is highly effective in the treatment of lymph node metastases from differentiated thyroid carcinoma.(ABSTRACT TRUNCATED AT 250 WORDS
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
- …
