1,720,969 research outputs found
Compositions for coatings based on (per)fluoropolyethers
No full textMessa a punto di formulazioni ad alto secco a base di perfluoropolieter
How often is adjuvant chemotherapy administered to elderly women (>70 years) with early breast cancer ?
No full textBackground: No randomized trials on adjuvant treatment of operable breast cancer (BC) in elderly women are available. We thus carried out a retrospective study of chemotherapy administration in women ≥ 70 years.
Material and methods: We reviewed tumor stage and treatment of all elderly BC patients referred from 1999 to 2003 to our institution. Major risk factors and therefore potential indication for chemotherapy were: T
≥2 cm, Grade 3, N positive and estrogen receptor (ER) negative status.
Results: In total, 260 elderly consecutive patients were eligible (diagnosis of pT1-pT3, non-metastatic BC). Median age was 76 years (70 – 97). Fifty-five per cent underwent conservative surgery; 84.6% nodal dissection and 5.8% sentinel node biopsy. Adjuvant chemotherapy was proposed for 96 of 186 high risk patients. Thirteen refused, while chemotherapy was started in 83 patients: 84.4% CMF, 9.6% 3M (mitoxantrone, methotrexate, mitomycin), 6.0% anthracycline-based regimens. Chemotherapy was interrupted in 21 patients, completed in 56 with dose reduction ≥25% in 16.1% of cases. Therapy is still ongoing in five patients.
Conclusions: Adjuvant chemotherapy was not proposed for 48.4% of elderly patients with high recurrence risk BC, probably due to age associated conditions (comorbidities, cognitive status, family support). Prospective studies are needed to determine tumor characteristics and geriatric conditions that should guide the choice for adjuvant chemotherapy in elderly patients and to define the role of biological parameters such as c-erbB2 overexpression
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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