1,721,024 research outputs found
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
IN VIVO IMAGING OF STEM CELL MEDIATED TREATMENT IN A MOUSE MODEL OF SPINAL CORD INJURY
Full text linkIntroduction: The use of adult stem cells in cell-mediated therapies is an area of considerable interest within tissue regeneration research. However, important variables such as the distribution of the injected cells, cell survival, target organ localisation cell proliferation and differentiation cannot be evaluated in vivo by using classical imaging approaches. This study propose multiple labelling protocols for in vivo visualisation by MRI, nuclear imaging and BLI of adult murine neural stem cell-mediated therapy, in spinal cord injury animal models. Methods: Murine neural stem cells (mNSCs) were directly labelled with different amounts of SPIOs (0 - 100 - 200 - 400 μg Fe/ml) in the culture medium and incubated with iron labelled medium for 24, 48 or 72 h in presence of carriers such as poly-L-Lysine (PLL), polybrene (PB) and protamine sulphate (PS). PLL and PS were tested at different ratio (Fe/PLL 1:0,03, 1:0,06 and 1:0,09 and Fe/PS 1:0,025 and 1:0,05). Labelled cells were analysed for viability, iron content (Perl’s Staining and spectrophotometer analysis), morphology, staminality and differentiation capability. After the labelling protocol set up, the loaded cells were injected into the tail vein of a spinal cord injury murine model and their distribution was followed by MRI for two months. Initial cell distribution was also followed by nuclear imaging after cell labelling with 111In-oxine (60 μCi/106 cells). Cells localization, distribution e viability, over time, were analysed in vivo by BLI after injection of mNCS infected with a viral vector expressing Luciferase under a PGK constitutive promoter (PLW vector). Results: the iron content/cell increased in proportion to the incubation time and to the iron concentration in the medium and in relation to different carriers (PLL, PB and PS) in labelled mNSCs. Longer incubation time (48 and 72h) and higher iron concentration (400 μg Fe/ml) resulted in marked toxicity and lower cell viability. The use of PB and PLL, as carriers, didn’t produce any increase of the labelling efficiency. The incubation for 24h with 200 μg Fe/ml in presence of different amount of PS didn’t influence significantly the cell viability and the proliferation rate. Furthermore, the percentage of iron-positive cells and the iron content/cell increased in proportion to the PS content in the medium even if higher amount of PS (Fe/PS 1:0.05 ratio) resulted in an aberrant morphology. For this reason, 200 μg Fe/ml incubated with Fe/PS 1:0.025 ratio for 24h, has been chosen as the best labelling condition. Labelled cells were able to form new neurospheres and maintained the nestin expression demonstrating the maintenance of self-renewal capability and stem cell features and were also able to differentiate, as confirmed by β-tubulin III and GFAP expression analysis. Nuclear imaging confirmed initial distribution to filter organs while MRI allowed to detect the presence of an iron signal due to stem cell localization into the lesion site since 7 days after injection. BLI permitted to demonstrate the viability of PLW infected mNSCs migrated at the lesion site and supported the MRI data. Conclusions: These results permitted to conclude that NSCs can be efficiently labelled with different molecules without significantly perturbing physiological stem cell features and self-renewal capability. These labelling protocols can be applied for the in vivo visualisation by MRI, nuclear imaging, and BLI of the distribution of stem cells after their transplantation into murine model of disease
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
Author Under Sail The Imagination of Jack London, 1893-1902
No full textIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Intro -- Title Page -- Copyright Page -- Dedication -- Contents -- Acknowledgments -- Introduction -- 1. Spirit Truth -- 2. From Absorption to Theatricality and Back Again -- 3. "I Will Build a New Present" -- 4. Sons as Authors -- 5. Fathers as Publishers -- 6. The Daughter as Author -- 7. Lovers as Authors -- 8. At Sea with the Family -- 9. Yellow News, Yellow Stories -- 10. The Return Home -- Notes -- Bibliography -- Index -- About Jay WilliamsIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
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