1,720,991 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
ESTABLISHMENT AND CHARACTERIZATION OF A CANCER STEM CELL LINE FROM A RARE BONE SARCOMA
No full textObjective: To establish of a bone cancer stem cell (CSC) line from a rare human bone disease, the high grade osteoblastic osteosarcoma (OS).
Material and Methods: Central high grade osteoblastic OS samples were collected at the “Unit Ortopedia Oncologica e Ricostruttiva”, AOUC Careggi, Florence, with informed consent approved by the local Ethical Committee. First, primary human cancer cell cultures of osteoblastic OS have been established. After that, the subpopulations of CSCs have been isolated from these, with the sphere-formation assay. Hence, the cancer stem cell phenotype has been evaluated by several cellular assays/stainings, by flow cytometry analysis and by analyzing the pro-files expressions of a few genes related to CSCs.
Results: We have established primary cell cultures of high grade osteoblastic OS from each samples collected. Consequently, from these we have started to isolate CSCs. Nowadays we have established a OS-CSC line, called as OSA5-CSC. The cancer stem cell phenotype from OSA5-CSC line was confirmed by observing the capacity of the OSA5-CSCs to differentiate into osteoblasts and into adipocytes, by showing the positive presence of the MSCs and ofthe ESCs markers into the cell line, and by evaluating a good rate (14 %) as clonogenic capacity. The presence of the ESC markers was confirmed also by their gene expression together with the expression of CD133. On the other hand, the malignant phenotype was verify by demonstrating the presence of the expression of genes involved in invasion/migration process (i.e., AXL and EZR) and in the pluripotency of CSC (i.e., MYC), by the agar soft and bythe ALDH1A1 assays.
Conclusions: In conclusion, we have collected a few biopsies of this rare bone disease. We have established primary cell cultures from these. We have completely characterized and studied a OS-CSC line at cellular and molecular level. Nowadays we are concluding the characterization of the OS-CSCs isolated from the relative cell cultures and we are starting the study of micro-RNAs related to their phenotype
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
- …
