1,720,953 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
Growth and characterization of gallium arsenide phosphide and gallium phosphide on silicon for III-V/Si multi-junction solar cells
Get PDFSubmission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2024-08-01The student, Ryan Hool, accepted the attached license on 2022-07-12 at 16:55.The student, Ryan Hool, submitted this Dissertation for approval on 2022-07-12 at 17:39.This Dissertation was approved for publication on 2022-07-14 at 15:06.DSpace SAF Submission Ingestion Package generated from Vireo submission #18267 on 2022-11-16 at 10:55:57Solar photovoltaic (PV) technologies offer the ability to provide a significant percent of the world’s increasing energy demand while reducing overall greenhouse gas emissions. At the same time, PV technology is critical for the future of power generation in space. Silicon single-junction (1J) solar cells dominate the terrestrial solar market due to high production efficiencies and low material and processing costs from decades of investment. However efficiency is a key driver to further reduce the cost of PV technology and little room remains to improve the efficiency of Si toward its theoretical limit. Multi-junction (MJ) solar cells using a combination of III-V compound semiconductors achieve much higher efficiencies through tailoring bandgaps of sub-cells, leading to their utilization in space technology. Nevertheless, III-V solar cells are hindered by small-diameter, high-cost substrates, excluding their use in terrestrial power generation and placing a barrier to pursuing a greater variety of space missions. Through epitaxial integration of III-V semiconductors on Si, there is great potential to dramatically reduce the cost of III-V MJ cells and to realize competitive, high-efficiency solar cells for both space and terrestrial power.
While epitaxial III-V/Si MJ solar cells offer the possibility of a much-desired combination of high efficiency and low cost, the difficulty of growing high-quality III-V materials on Si substrates has left the potential of this PV technology unfilled. The combination of a ~1.7 eV III-V top cell and a ~1.1 eV Si bottom cell is close to the ideal double-junction (2J) bandgap pairing and has a > 25% (relative) higher theoretical maximum efficiency than for Si by itself. However, epitaxial III-V/Si MJ solar cells have yet to demonstrate efficiency higher than Si 1J solar cells. Extended defects resulting from crystal mismatches between III-V materials and Si hamper III-V sub-cell performance, and reducing the densities of these defects is critical to advancing epitaxial III-V/Si technologies. The larger lattice constants for III-V materials than for Si inevitably cause threading dislocations to form that extend through III-V sub-cell(s). Gallium Arsenide Phosphide (GaAsyP1-y) is an ideal partner to Si due to possessing a tunable direct bandgap from 1.42 – 2.01 eV and the smallest lattice mismatch to Si for ~1.7 eV III-V materials (~3.1%). Gallium Phosphide (GaP), with the closest lattice constant to Si for III-V materials, offers a convenient starting point for III-V epitaxial growth on Si before further expanding the lattice constant with compositional grading of GaAsyP1-y.
Obtaining low defect densities in ~1.7 eV GaAs0.77P0.23 (GaAsP) has remained challenging with threading dislocation densities (TDD) typically around an order of magnitude higher than desired for high performance (targeting ≤ 1 – 2 × 10^6 cm-2). More troubling is that relaxed GaP on Si can result in TDD > 10^7 cm-2, even though the lattice mismatch is less than an eighth of that for ~1.7 eV GaAsP. In this dissertation, I focus on defect management for relaxed GaP and GaAsP to improve material quality and advance GaAsP/Si 2J solar cell development. To this end, I investigated defects in GaP and determined growth strategies to reduce TDD to the lowest reported values I am aware of for both p- and n-type relaxed GaP on Si. I observed a strong dependence of TDD with doping and demonstrated methods to reach parity for relaxed p- and n-GaP on Si. For the GaAsP top cell I identified additional performance-damaging defects and strategies to mitigate them to realize high-current top cells. As a result, my collaborators and I realized the highest reported efficiencies for both GaAsP/Si 2J and ~1.7 eV GaAsP 1J solar cells on Si. Lastly, I studied radiation hardness and temperature-dependent device performance of ~1.7 eV GaAsP solar cells to broaden the space testing literature for this material
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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