1,720,956 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
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
Dynamika sieci krystalicznej a pojawianie się ferroelektryczności w wolframianie bizmutu Bi 2WO6 i antyferroelektryczności w niobianie srebra AgNbO3 i roztworach stałych na jego bazie
Full text linkThree groups of materials were studied in this thesis. First studied group was Bi2WO6 (BWO). Two types of BWO single crystals were examined. BWO is an uniaxial ferroelectric material studied mainly due to its high spontaneous polarization, high Curie temperature as well as its ion conductivity, and excellent photocatalytic properties. BWO crystals were studied by X-ray diffraction, microscopic methods (SEM), dielectric and Raman experiments. Moreover, pyroelectric effect was examined. Dielectric studies confirmed existence of dielectric anisotropy. Raman experiments evidenced that symmetry distortion slowly decreases with increasing temperature. Moreover, the Raman spectra show no signs of phase transition in studied temperature range. At least five phonon modes show significant softening. Frequency of these modes does not decrease to zero in the vicinity of P21ab-B2cb transition. In higher temperatures, above P21ab-B2cb transition, the temperature dependence of frequency of 57 cm-1 mode is expected to change and decrease to zero in vicinity of ferroelectric phase transition. This mode is responsible for appearance of ferroelectric state in Bi2WO6.
The second studied group of materials were nonstoichiometric AgxNbO2.5+x/2 ceramics. This research was performed to evaluate whether deficient of silver in crystal lattice is responsible for appearance of wide maximum of dielectric permittivity. Ceramics were obtained for silver concentrations x equal to 0.95, 0.98, 1.00, 1.02, and 1.05. Obtained samples were studied by scanning electron microscopy, X-ray diffraction, dielectric and thermal (DSC) experiments. SEM and XRD experiments showed that samples contained mainly perovskite phase of AgNbO3. Only for x=0.95 a small quantities of secondary phase were observed. For all compositions metallic silver precipitations appear and their quantity increase with the increase of x. Moreover, SEM and XRD studies show increase of homogeneity with increase of silver to niobium ratio. Finally, it was concluded that 2% excess of Ag2O in initial composition significantly increases the quality of ceramics. Dielectric and thermal measurements (DSC) were carried out in wide temperature range. They revealed that the phase transitions become less diffused and shifted towards higher temperatures with the increase of silver concentration. These temperature shifts are more significant for the low temperature phase transitions, which are connected with appearance of the polar ferroelectric and antiferroelectric states, than for high temperature transitions related to oxygen octahedra tilts. This happens because displacements of Ag ions create electric dipoles, which form polar phases in AgNbO3 with dipoles created by Nb ion displacements. Increase of silver concentration leads to increase of both quantity and value of interacting dipoles and thus increase temperatures of phase transitions.
Last group of studied materials were silver lithium niobate ceramics Ag1-xLixNbO3 (ALN). ALN were studied in vicinity of morphotrophic phase transition (x≤0.1). These materials were studied mainly because of their high spontaneous polarization and their promising, as for lead-free materials, values of piezoelectric coefficients. Samples were examined by SEM method, XRD diffraction, mass spectroscopy SIMS, dielectric, thermal DSC and Raman experiments. Characterization of samples by SEM, XRD and SIMS point to their high quality. They consist mainly of perovskite phase and small amounts of secondary phase. Grains show high homogeneity. Only small amounts of secondary phase appear in spaces between grains as well in vicinity of holes. For concentration of lithium between 0.05 ÷ 0.06 morphotrophic phase transition from rhombic M1 phase and rhombohedral R phase occurs. Temperature evolution of dielectric permittivity for ceramics with x≤0.05 are very similar to those observed for pure AgNbO3. For x=0.06 maximum of ε’(T) related to M1-M2 transition vanish and for x>0.06 only two wide maxima of ε’(T) are observed. First maxima is related with transition from ferroelectric R phase to antiferroelectric M phase. Second is related with transition from M phase to paraelectric O phase. With increase of lithium concentration, character of all observed transition becomes more diffusive. This indicates increase of structural disorder. Thermal studies confirm these results. Basing on these studies phase diagram for Ag1-xLixNbO3 was proposed. Analysis of Raman spectra points to relationship between crystal lattice dynamics and appearance of antiferroelectric state and its transformation to ferrielectric state for x≤0.05, as well as appearance of ferroelectric order for solutions with lithium concentration higher than 0.06. Analysis of central peak shows that temperature evolution of relaxation time for Ag0.98Li0.02NbO3 and Ag0.96Li0.04NbO3, related with dynamics of displacements of Nb ions changes in partial freezing temperature Tf and in temperature of ferrielectric transition M1-M2. Moreover, maximum of intensity of central peak observed in vicinity of M2-M3 transition corresponds well with maximum of low frequency dielectric permittivity. This suggests that Nb relaxation is responsible for appearance of wide maximum of ε’(T). Analysis of low frequency Raman spectra for ferroelectric Ag0.9Li0.1NbO3 ceramic showed that strong central peak appears in the vicinity of R-M transition, while low frequency phonon mode shows significant softening. Therefore, this mode is responsible for appearance of ferroelectric state
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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