1,720,963 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
Numerical study of morphing helicopter rotors
Get PDFThis thesis shows high-fidelity numerical simulations for combined fluid, structural and servo-systems of a helicopter, to make predictions and validations of helicopter rotor on blade-actuators. This aero-servo-elastic approach forms the main novelty of this thesis. The physics of the active rotor blade aerodynamics and structural dynamics are simulated, and the resulting knowledge can then be implemented in comprehensive rotor suites. Assessing the physics is important for the introduction of new rotor concepts, something which low- and mid-order methods can not do. The Helicopter Multi-Block 3 (HMB3) simulation suite developed at University of Glasgow was expanded to include the servo system in the aeroelastic models. The software does not include a rigid body model for the rotor hub. Both hub and blade structural dynamics are simulated in the commercial FEM solver MSC NASTRAN.
Expanding the flight envelope with higher top-speeds, while avoiding retreating blade stall, has been a challenge since the inception of helicopters. A promising innovation is the variable twist rotor blade, which through intrinsic actuation, can optimise the twist for the given flight condition and exploit aeroelasticity to modify the rotor blade path for vibration control and possibly higher trim-able thrust. This thesis only considers twist actuators, due to their benefits in weight, simplicity and airworthiness over other actuation methods. However, the aero-servo-elastic modelling can be applied to any rotor blades with piezoceramic actuators, such as active flaps or Gurney flaps, if the actuator is sufficiently resolved in the structural model.
The aeroelastic method is validated against the Helicopter Validation and Acoustic Baseline rotor (HVAB). Performance metrics, structural deformations and flow physics are compared and confirm the accuracy of the method. Additionally, rotor blade structural models of 1D beam and 2D/3D-finite elements are modelled and compared, including a mesh study. Finite elements allow the modelling of on-blade actuators, instead of simplifying the problem to only include their effects in simulations. The structural models of the Smart Twisting Active Rotor (STAR) are compared to experimentally obtained data, for validation of the methods used in this thesis. This also includes a study of the actuator modelling via a thermal analogy method, where the voltage on a piezoelectric material is equated to temperature in a thermally expanding material.
Using the developed aero-servo-elastic method, improvements in the forward flight vibration metric could be predicted for the STAR rotor blade in two flight conditions. The largest vibration improvement was observed at high-speed level flight. In this condition, increased passive blade twist has a large vibration penalty. In a level flight at maximum thrust, experiencing blade-vortex interactions (BVI), the active twist was shown to improve the moment trim, leading to conclusions of higher thrust capacity in this relatively high-speed flight case. The observed effects on the rotor lift-to-drag ratios were negligible.
For the STAR, a 1D beam model and a mixed 2D/3D finite element model were compared. The beam model overpredicts the blade mode frequencies of the measured rotor blades, because the sectional properties of the received dataset were slightly overpredicted. A modified set of properties, yielding more accurate mode frequencies is also presented. The finite element model, built from available geometric and material data, was within 10% of the measured frequencies. The strong 3-dimensional structural coupling of the finite element model is showcased, which could not be observed in the beam model. A small blade-untwisting under centrifugal force is found for the finite element model. The actuator effectiveness degrates under centrifugal tension and this mechanism is discussed. A hovering simulation of the rotor, with a loosely coupled fluid-structure simulation shows the differences between the models. It concludes, that especially for blades with torsion actuators, 3D finite element model approaches are necessary to obtain correct results
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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