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
Kinetika dan termodinamika komposit HAp-Fe3O4 dari cangkang tutut (Bellamya javanica) sebagai adsorben Pb(II) pada limbah akumulator: Kinetics and thermodynamics of HAp–Fe₃O₄ composite from tutut snail shell (Bellamya javanica) as Pb (II) adsorbent in battery wastewater
No full textPeningkatan jumlah kendaraan listrik dan perkembangan industri otomotif telah menyebabkan akumulasi limbah akumulator bekas yang mengandung logam berat berbahaya, khususnya Pb(II). Jika tidak ditangani dengan baik, limbah ini dapat mencemari lingkungan dan membahayakan kesehatan manusia dan ekosistem. Adsorpsi menggunakan material berbasis hidroksiapatit (HAp) menjadi salah satu metode penanganan yang efektif. Cangkang tutut (Bellamya javanica), limbah biomineral yang kaya akan kalsium karbonat (CaCO3) berpotensi dimanfaatkan sebagai prekursor kalsium pada sintesis HAp. Penelitian ini bertujuan menentukan kondisi optimum pada pH, waktu, suhu, dan konsentrasi komposit HAp-Fe3O4 sebagai adsorben ion timbal Pb(II), menentukan seberapa efisien adsorben komposit HAp-Fe3O4 dalam mengadsorpsi ion timbal, menentukan parameter kinetika dan termodinamikanya dalam proses adsorpsi, serta memberikan solusi material ramah lingkungan dan berkelanjutan yang dapat diimplementasikan untuk mengurangi kandungan logam berat pada lingkungan yang dihasilkan dari limbah akumulator. Komposit disintesis melalui metode deposisi kimia. Hasil karakterisasi menunjukkan struktur berpori dengan luas permukaan 3002 m2/g, ukuran pori 2,21 nm, dan volume pori 3,32 cc/g. Optimasi menunjukkan kondisi optimum pada pH 6, waktu kontak 50 menit, suhu 25°C, dan konsentrasi awal 10 ppm. Studi kinetika mengikuti model pseudo-order-dua (K2 = 2,23 g/mg·menit), mengindikasikan adsorpsi kimia. Parameter termodinamika ( ΔG°<0, ΔH°<0, ΔS°>0) menunjukkan proses spontan, eksoterm, dan disertai peningkatan entropi. Model isoterm Freundlich menunjukkan kesesuaian terbaik (1/n = 0,82; KF = 467). Aplikasi terhadap limbah akumulator menunjukkan efisiensi adsorpsi 99,23%, menurunkan Pb(II) dari 2,28 ppm menjadi 0,017 ppm, sesuai baku mutu Permen LH No. 5 Tahun 2014. Komposit ini menunjukkan potensi tinggi sebagai adsorben logam berat yang efektif dan berkelanjutan.The rapid growth of electric vehicles has led to an increased accumulation of used battery waste containing hazardous heavy metals, particularly Pb(II). Improper management of this waste can severely impact the environment and human health. Adsorption using hydroxyapatite (HAp)-based materials is an effective remediation method. Tutut shells (Bellamya javanica), a biomineral waste rich in calcium carbonate (CaCO3), can serve as a calcium precursor for the green synthesis of HAp. This study aimed to determine the optimum conditions of pH, contact time, temperature, and initial concentration for the HAp–Fe3O4 composite as an adsorbent for Pb(II) ions, assess its adsorption efficiency, evaluate kinetic and thermodynamic parameters, and provide an eco-friendly, sustainable material solution for heavy metal reduction originating from battery waste. The composite was synthesized via chemical deposition, showing a porous structure with a surface area of 3002 m2/g, pore size of 2.21 nm, and pore volume of 3.32 cc/g. Optimum adsorption occurred at a pH of 6, 50 min, 25°C, and an initial concentration of 10 ppm. Kinetic studies followed a pseudo-second-order model (K₂ = 2.23 g/mg·min), indicating chemisorption, whereas thermodynamic parameters (ΔG°<0, ΔH°<0, and ΔS°>0) indicated a spontaneous exothermic process. The Freundlich isotherm model (1/n = 0.82 and KF = 467) exhibited the best fit. Application to real battery wastewater achieved 99.23% removal efficiency, reducing Pb(II) from 2.28 ppm to 0.017 ppm, meeting the quality standard of the Indonesian Ministry of Environment Regulation No. 5 of 2014. These findings suggest that the HAp–Fe₃O₄ composite has strong potential as an effective and sustainable heavy metal adsorbent
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
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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