1,720,965 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
Electronic Structure Engineering via Functionalization of Two-Dimensional Quantum Materials
Get PDFThe goal of this thesis is to investigate and establish methods of electronic structure engineering in (quasi-)two-dimensional quantum materials. Since the inception of the field of two-dimensional matter, many production methods have been established for a broad range of materials. While these crystals by themselves show many interesting properties from a fundamental physics perspective, one of their main advantages is their "all-surface" nature. This property allows for manipulation of the inherent electronic behaviour of a given material from the outside, often leading to fundamental changes in the electronic structure. As part of the maturation of the field, it is important to establish methods for band structure engineering and investigate their effects on the known materials. This thesis thus focuses on ways to manipulate the electronic properties in three distinct material families.
In black phosphorus, the electronic structure of the pristine bulk crystal is established using angle-resolved photoemission spectroscopy (ARPES) and investigated via a tight-binding (TB) model fitted to the experimental dispersion. From this bulk fit, the layer-dependent band gap is determined with a zone-folding approach. Comparing the zone-folded band structure with a direct calculation of the few-layer bands shows good agreement between both methods. The agreement confirms that interlayer hybridization and surface effects barely affect the dispersion of few-layer samples and allows to infer many properties of few-layer phosphorene from the bulk crystal. The tight-binding model is used to predict the doping dependent Fermi surface of bulk and few-layer black phosphorus.
Modifying the band structure of bulk black phosphorus by caesium doping is shown leading to a band inversion at the Gamma-point. Angle-dependent X-ray photoemission spectroscopy confirms the caesium is adsorbed on top of black phosphorus rather than intercalated. A bilayer version of the TB model developed for the pristine crystal is used to explain the experimental observation of the band inversion. A strong reduction of the interlayer interaction is inferred. This reduction is explained with density functional theory calculations. The best fit to the experimental observation is reproduced by assuming a stacking fault of the topmost black phosphorus layer, thereby reducing the interlayer interaction. These calculations confirm the surface nature of the downshifted conduction band and thus establish the experimental observation of a surface resonance state.
The optoelectronic properties of a MoS2/Graphene/Iridium(111) heterostructure are investigated using ARPES, photoluminescence and Raman spectroscopy. A sharp photoluminescence peak is observed. The lack of quenching is explained with a low interaction between MoS2 and graphene. The growth of the MoS2/graphene heterostructure consequently allows for photoluminescent properties where they would usually be quenched on a metallic substrate due to non-radiative recombination channels. Combining photoluminescence spectroscopy of the pristine sample with the electronic band gap of lithium doped MoS2 determined from ARPES in conjunction with theoretical calculations for the doping-dependent band gap renormalization, the exciton binding energy in the heterostructure is predicted.
Investigating the high-doping regime of bilayer graphene by deposition of large amounts of caesium leads to the observation of a strained alkali metal quantum well structure grown on the bilayer graphene substrate. The resulting band structure is investigated using ARPES. A 2x2 superstructure is observed. Combining the experimental results with theoretical calculations elucidates the microscopic structure of the resulting sample. The two most likely structures are determined from theoretically evaluated total energy considerations and good agreement with the experimental band structure. The broadening of the bands arising from the Cs quantum well structure is found to be close to the resolution limit of the instrument suggesting only very small many-body renormalization in the Cs derived states
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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