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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
Oxygen isotope composition of megacrysts from the Monastery kimberlite
Get PDFKimberlite megacrysts are large (>1 cm diameter) crystals that are thought to have crystallized from sub lithospheric proto-kimberlite melts near the base of the subcontinental lithospheric mantle (SCLM) during complex melt-SCLM interactions. Thus, these megacrysts represent an excellent opportunity to constrain the effects of SCLM assimilation on the δ18O values of primary mantle-derived melts. Laser fluorination δ 18O values for a well-characterized suite of megacrysts from the Monastery kimberlite, South Africa, are presented to: (1) constrain the δ18O value of the mantle source and (2) evaluate the effects of melt-SCLM interactions on the δ18O value of mantle-derived magmas. The Monastery kimberlite megacryst assemblages are as follows (in order of crystallization): (1) gt + cpx + opx + Fe-poor ol; (2) gt + cpx + opx + Group 1 ilm (Cr-, Mg-poor); (3) Group 2 ilm (Cr-rich, Mg-poor) + phlog; (4) Group 2 ilm + phlog + zir; (5) Group 2 ilm + phlog + zir + Fe-rich ol; and (6) Group 3 ilm (Cr and Mg-rich) + calcic cpx. The δ18O values of the megacrysts from the initial assemblage are: δ18Ogt = 5.12 and 5.25‰ (n = 2); δ18Ocpx = 4.72 and 5.02‰ (n = 2); δ18Oopx = 5.20 and 5.55‰ (n = 2); δ18OFe-poor ol = 5.43- 5.84‰ (x̄ = 5.23‰, σ = 0.10, n = 10), all showing no correlation between δ18O values and major element compositions. This implies that these megacrysts were in equilibrium with a melt of mantle-like δ18O values. The Group 1 ilmenites have δ18O values expected for mantle ilmenites, ranging from 3.88-4.35‰ (x̄ = 4.10‰, σ = 0.15, n = 8) (also in equilibrium with a melt of mantle-like δ18O values). They show a weak positive correlation between the δ18O value and Cr#, and no correlation with Mg#. In contrast, the δ18O values of the megacrysts from assemblages three to five implies that they were in equilibrium with a melt of δ18O values below the expected mantle-like range: δ18OGroup 2 ilm = 2.74-4.46‰ (x̄ = 3.56‰, σ = 0.45, n = 11); δ18Ophlog = 4.25-5.73‰ (x̄ = 5.08‰, σ = 0.48, n = 8); δ18Ozir = 4.87-5.09‰ (x̄ = 4.98‰, σ = 0.08, n = 6); and δ18OFe rich ol = 4.53-4.94‰ (x̄ = 4.75‰, σ = 0.15, n = 5). The Group 2 ilmenites show no correlations between the δ 18O value and Mg# and Cr#. The Fe-rich olivines show positive correlations with Mg# and Ni. The phlogopites show no correlations with the major element compositions. The Group 3 ilmenites have δ18O values ranging from 2.93-4.05‰ (x̄ = 3.59‰, σ = 0.36, n = 7). These are below the δ18O values expected for mantle ilmenites, but are slightly higher than the Group 2 ilmenites. The Group 3 ilmenites show a positive correlation between the δ18O value and Mg# and no correlation of δ18O with Cr#. The δ18O values of primary mantle-derived magmas are ~5.7‰ (Eiler, 2001) unless recycled crust is present in the source or if the magma assimilates crustal material en route to the surface. The variations in the δ18O values throughout the megacryst suite suggest that the parent melt underwent open system evolution in the SCLM. It is proposed that the Monastery proto-kimberlite originated from a convecting mantle source with a mantle-like δ18O value of ~5.33‰, which experienced two stages of evolution involving fractional crystallization and assimilation/melt-wall rock interaction. The low δ18O values in the phlogopites, zircons, Fe-rich olivines, and especially the Group 2 ilmenites (as low as ~4.25‰) can be explained by the assimilation most likely of low-δ18O eclogite (first stage evolution). The increased Cr# in the melt marked by the Group 2 ilmenites suggests the assimilation of Cr-rich pyroxenite veins. The Group 3 ilmenites give increased equilibrium melt-δ18O values of up to ~5.56‰ and give increased Mg# relative to the Group 2 iii ilmenites, which may be explained by the assimilation of Mg-rich metasomatized peridotite (second stage evolution)
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
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
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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