1,720,961 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
Liquid acrylic resin-based composites for marine and renewable energy applications
No full textRapid growth in the installation of wind and tidal turbines has caused increasing
usage of polymer composite materials to manufacture the blades, but the current use
of non-recyclable thermoset materials makes composite waste a growing problem.
The development of recyclable alternatives to traditional thermoset matrices, or new
techniques for recycling these materials, is therefore a necessity. While established
high-performance thermoplastics such as polyether ether ketone (PEEK) are recyclable
and have excellent mechanical properties, leading to their use in the aerospace
industry, the high temperatures and pressures needed to process them make their
use in wind and tidal turbine blades prohibitively expensive. Recyclable alternatives
should therefore be processable via vacuum infusion, which is commonly used with
thermoset resins in the manufacture of wind and tidal turbine blades. Room temperature
infusible acrylic resins, known commercially as Elium®, are one such family
of promising recyclable resins, and are currently the only commercially available
‘drop-in’ thermoplastic alternative for the marine and renewable energy sectors.
Since liquid acrylic resins are relatively new to the market, several aspects of
their use remain uncertain. For example, if acrylic-matrix composites are to be
used in the tidal stream energy and marine sectors, they must be able to withstand
long-term immersion in seawater without significant losses in mechanical properties.
While published studies on water absorption in acrylic-matrix composites often rely
on multi-compatible or other non-tailored fibre sizing agents, it has been suggested
that improvements to the mechanical properties and water absorption behaviour of
these composites may be gained with a sizing agent tailored specifically to acrylic
resins. Additionally, beyond being simply a recyclable replacement to traditional
thermosets, acrylic resins create opportunities to improve the manufacturing of wind
and tidal turbine blades. Since acrylic is a thermoplastic, it can be welded instead
of adhesively bonded, which may result in faster manufacturing with stronger, more
resilient bonds.
Several aspects of acrylic resins relevant to marine and renewable energy applications
are therefore explored in this thesis. Firstly, accelerated seawater ageing
is applied to glass-fibre reinforced acrylic (GF/acrylic) and PPE-modified acrylic
(GF/acrylic-PPE) composites, as well as to a traditional GF/epoxy baseline. The
static mechanical properties (tensile, flexural, and short beam) are compared before
and after ageing, and electron microscopy of the fracture surfaces to determine the
effects of water ingress on fracture propagation. The diffusion coefficients of water
in GF/acrylic (1.8×10⁻¹² m² s⁻¹) and GF/acrylic-PPE (3.4×10⁻¹² m² s⁻¹) were an
order of magnitude larger than that of GF/epoxy (0.16 × 10⁻¹² m² s⁻¹), and analysis
showed this would correspond to greater penetration of water into acrylic-matrix
tidal turbine blades.
The tension-tension fatigue resistance of 0° GF/acrylic coupons with an acrylictailored
sizing is then characterised, both in dry and water-saturated conditions.
Comparisons are made to the performance of GF/acrylic composites with a multicompatible
sizing agent to investigate the necessity of acrylic-tailored sizing agents.
Water saturation was found to decrease the low-cycle fatigue performance of the
composite, but performance was more similar in the high-cycle fatigue to which
wind and tidal turbine blades are subject. For example, at 2 × 10² cycles, ageing
reduced the fatigue strength by 21%, but this decrease was 14% at 2 × 10⁵ cycles.
Differences in static and low-cycle fatigue performance were also observed between
the acrylic-tailored and multi-compatible composites—for example a 12% lower dry
UTS with the tailored reinforcement—likely due to differences in the fibre diameter
and tow size, but their performance was again similar in high-cycle fatigue.
A novel method of joining acrylic-matrix composites is also explored. The solubility
of acrylic polymer in its own liquid monomer creates the opportunity to
‘weld’ acrylic-matrix (Elium®) composites without the application of heat. In this
method, termed resin welding, acrylic monomeric resin is infused between acrylicmatrix
composite parts. The resin dissolves and diffuses into the acrylic matrix and
creates a continuous material, and a strong bond, when it polymerises, without the
sensitivities of traditional welding methods to adherend or bondline thickness. Single
lap shear testing was conducted on resin-welded and adhesively bonded coupons
with varying bondline thicknesses and filling fibres, and the bonding and fracture
mechanisms were investigated using scanning electron microscopy and the diffusion
of dyed acrylic resin. High strengths and low sensitivity to bondline thickness were
observed, with the highest bond strength of resin-welded coupons reaching 27.9
MPa, which is 24% higher than the strongest weld reported in the literature. This
indicates that resin welding is a promising alternative to traditional bonding and
welding methods for acrylic-matrix composites
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
- …
