1,720,968 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
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
Nitrogen and the leaf growth of temperate cereals
No full textUnder agricultural conditions where soil moisture is adequate, low nitrogen (N) availability is usually the main soil factor limiting the growth and yield of temperate cereals. A major part of the positive response of plant growth to additional N is a result of greater leaf area, an important determinant of plant photosynthetic capacity. This thesis investigated various aspects of the influence of N on the leaf growth of temperate cereals.
Data were presented in Chapter 2 which investigated the influence of additional N as nitrate (NO₃⁻) or ammonium (NH₄⁺) on reserve mobilisation and seedling growth prior to emergence from the substrate. The amount of N assimilated was similar with either form of N, but as a result of enhanced endosperm mobilization, seedling dry weight (d.wt) was greater with NO₃⁻. When seedlings were supplied chloride, reserve mobilisation and seedling growth were as great as with NO₃⁻. It was concluded that the increased rate of mobilisation of seed reserves and subsequently greater seedling growth with additional NO₃⁻ were due to greater seedling water uptake, probably acting via increased seed water contend A similar mechanism, but acting directly via the seed, was suggested for enhanced reserve mobilisation with increased levels of endogenous seed N.
Chapter 3 investigated the influence of N form and availability on the growth of individual main stem and tiller leaves. With increasing external N concentrations over the range 0 to 2.5 - 5 mol m⁻³ leaf growth characteristics and maximum leaf area attained were similar with N supplied as NO₃⁻, NH₄⁺ or glutamine. Leaf area increased further with increasing external concentrations of NO₃⁻ or glutamine to 20 mol m⁻³ but with NH₄⁺ it usually declined substantially. As leaf growth was similar with NO₃⁻ or glutamine over a wide range or external N concentration, it was suggested that the site of N assimilation is probably not a major factor in determining the extent of individual leaf area development. However, it is possible that factors associated with NH₄⁺toxicity influence the growth of leaves.
It was demonstrated in Chapter 4 that greater individual leaf area with additional NO₃⁻ was associated with an increase in both cell number and size. Increased cell division was thought to be due to increased availability of both photosynthate and N. It was proposed that greater cell size with additional NO₃⁻ was due to an increase in the availability of osmoticum, primarily sucrose. Also, it was suggested that at higher external NO₃⁻ concentrations, additional types of osmotica, such as NO₃⁻, counter ions and organic acids, are also available as a result of assimilation and storage of NO₃⁻ in the leaves.
The influence of N availability and form on shoot to root d.wt ratio (S:R) and leaf d.wt as a fraction of total plant d.wt (LWR) were investigated in Chapter 5. It was shown that regardless of whether N was supplied as NO₃⁻, NH₄⁺ or glutamine, increasing external N concentration resulted in an increase in plant reduced-N content and S:R or LWR, though at any given total plant d.wt, all three parameters were greater for plants supplied NH₄⁺ or glutamine. Hence, at any given plant N content, S:R or LWR were similar, regardless of N form supplied. These results were discussed in terms of a proposed mechanism for the control of S:R by N. It was also shown that leaf area produced per unit leaf N was greater for plants supplied NO₃⁻ compared to NH₄⁺ or glutamine; this does not appear to have been reported previously.
In Chapter 6 it was demonstrated that despite relatively high initial levels of soil N, fertilizer N applied at sowing had positive effects on the grain yield of all the temperate cereals investigated. The reason for the increase was similar for all species: additional N increased the fraction of available photosynthetically active radiation (PAR) intercepted by increasing the rate of canopy development. As a result, crop dry matter (DM) production increased and as harvest index (HI) was not affected, grain yield was greater with additional N. Differences between species in the amount of grain produced were not associated with the amounts of PAR intercepted or DM produced, but were related to differences in HI
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