1,720,959 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
Body force modelling for axial and centrifugal compressor pre and post-stall aerodynamics
Get PDFTunstall, Richard - Industrial Supervisor
Mazur, Steven - Industrial Supervisor
Harvell, John - Industrial SupervisorThe operation of a jet engine is limited in a way to ensure that the manifestation,
propagation and growth of local flow compressor instabilities is prevented. This inevitably
leads to more conservative compressor designs with increased surge margins
and reduced operating range to avoid the occurrence of unstable compressor phenomena.
These instabilities are known as rotating stall and surge and their implications
on the structural integrity and operability of the engine can be catastrophic.
These phenomena and the inception mechanisms that trigger their occurrence are
not yet fully understood, while the knowledge gap is exacerbated when considering
centrifugal or axi-centrifugal configurations. The cost of experimental campaigns
for the investigation of the post-stall response of aero-engine compression systems is
excessive, while the compressor is usually restricted to low rotational speeds to prevent
severe structural damage. The experiments can only be performed at a more advanced,
mature phase of the compressor design process. Sophisticated transient simulations
using commercial CFD software offer an alternative approach but the excessive
associated computational cost requirements make their real-life usage challenging.
Through-flow codes combining reduced and higher-order modelling methods are a
computationally efficient alternative, however very few validated implementations are
reported in the literature and their capabilities are strictly limited to axial compressor
configurations.
A lower-order modelling approach is developed, whereby the compression system is
solved as an empty duct with body force-fields imparting turning and losses to the flow.
A new body force model, applicable to all types of blades is developed. The blade
curvature is fully defined in three dimensions accounting for axial, circumferential,
radial forces and blade leaning. The flow-field solution is obtained transiently by
solving the 2D axisymmetric Euler equations on a body force-relevant grid which
ensures that the grid lines are aligned with bladed domains. The governing equations
with blockage in the relative frame of reference are derived, thus replicating both
metal and aerodynamic blockage effects, along with a method for the precise definition
of the additional blockage terms in convoluted ducts. The Godunov scheme coupled
with 3 Riemann solvers is used to obtain the fluxes. New analytical, simplified
models are derived to estimate aerodynamic blockage and mixing losses at reverse
flow conditions in impeller and axial blade passages. Loss correlations are used to
estimate losses at forward flow conditions, while mixed and reverse flow are treated
with a separate model.
The validity and limitations of the different modelling approaches are investigated
extensively using test-case scenarios and CFD data. The validation of the overall
through-flow framework is carried out on axial compressor and centrifugal compressor
stages using CFD and if available, experimental data. Steady-state, forward and
reverse flow characteristics are in good agreement with CFD and experimental
data, while the flow-field is reproduced with reasonable accuracy. Transient, post-stall
simulations in centrifugal compressors are carried out and validated against
experimental data. The code constitutes the first successful, validated, through-flow
approach, capable of predicting the post-stall, steady-state and transient aerodynamic
performance in centrifugal compressors.PhD in Aerospac
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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