1,721,068 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
Full text linkWe 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
Full text linkWe 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
NMR studies on holo-CcmE and in vivo mutagenesis studies on the interaction between CcmC and CcmE
Full text linkAt least five different systems are responsible for the maturation of c-type cytochromes. System I, present in the mitochondria of photosynthetic organisms and most Gram-negative bacteria, is the most complex cytochrome c biogenesis system discovered. In the model organism Escherichia coli, more than 10 gene products work together to attach heme to the highly conserved CXXCH motif of the apo-cytochrome polypeptide. This system consists of proteins that chaperone the heme and the apo-cytochrome, and they ensure the correct assembly of the holo-cytochrome. In this thesis, CcmC and CcmE, two key players in the heme delivery part of System I prior to covalent attachment, have been investigated. Particular emphasis has been given to CcmE, an unusual heme chaperone that binds its heme via a covalent yet transient bond using its H130 residue. Bioinformatics techniques have been used to identify potential key residues on CcmC and CcmE, especially residues with high conservation and/or covariance between the two proteins. Site-directed mutagenesis studies and in vivo experiments were used to demonstrate that three pairs of conserved polar amino acids sharing a common orientation on CcmC and CcmE are crucial for the assembly of the CcmC:heme:CcmE complex, an essential intermediate for holo-CcmE formation. Single and multiple variants of these polar amino acid pairs demonstrated that these residues drive the interaction between CcmC and CcmE. Covariance analysis identified two highly co-varying residues on CcmC and CcmE. It was demonstrated that these residues play an important role in fine-tuning the positioning of CcmE in its complex with heme-bound CcmC, and their relative size is crucial for their role. Any perturbations decreasing the size of these residues led to incomplete processing of holo-CcmE, and abolishment of cytochrome c maturation. Holo-CcmE was reconstituted in vitro, and this protein was studied using 2D 1H- 15N HSQC. These studies provided residue-specific-level details on how the heme moiety interacts with the polypeptide in the covalently formed holo-CcmE. Contradictory to previous predictions, it was demonstrated that the heme moiety is not in close proximity to the core β-barrel fold of the protein. Rather, it was shown that heme interacts directly with the C-terminus. 2D 1H- 1H TOCSY studies were used to show that no tyrosine or phenylalanine ligands exist to the heme in holo-CcmE formed in vitro, suggesting that the protein most likely does not pack around the heme. These findings are consistent with the chaperone role of the protein, as the interaction of heme with the C-terminus enables its swift sequential transfer to the apo-cytochrome through CcmF. Heme titrations probed via 2D 1H- 15N HSQC were carried out on the H130A variant of CcmE, which cannot bind heme covalently. These studies provided clear insight into the non-covalent interactions between CcmE and heme, and the putative heme pocket of the CcmE protein. It was demonstrated that no heme pocket exists on apo-CcmE, and any non-covalent interactions between CcmE and heme are located around the C-terminus, specifically around R148 and R149. 1H- 1H 2D TOCSY identified Y154 as a potential ligand of the non-covalently bound heme. It was demonstrated that the highly conserved Y134 residue acts during initial non-covalent interactions with heme, and then may ligand switch to the Y154 residue
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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