1,720,953 research outputs found
Design and Implementation of a Web-Based Relay Maintenance Information System at the Substation
Get PDFProtection relays detect disturbances or abnormal conditions in the electric power system, isolate disturbances, eliminate abnormal conditions, and produce signals or indications. One of the protection relays used in substations is the Over-Current Relay (OCR) and Ground Fault Relay (GFR). Routine maintenance of OCR and GFR is usually done by resetting or replacing the relay. However, the maintenance process was carried out manually using special test equipment, with the results recorded manually in a form, which was then digitized. This procedure is considered less effective. This study develops a web-based relay maintenance application using the waterfall method. This method was chosen because of its structured approach, complete documentation, and cost and processing time stability. The test results show that the web-based system functions according to the expected functionality. This application has been proven to facilitate and increase officers\u27 effectiveness in relay maintenance based on a user survey. This application\u27s OCR and GFR setting results are simulated using the ETAP 19.01 application for a short circuit fault scenario. The simulation results show that the relay works according to the inverse standard characteristics. The relay trip time for a fault on the 150kV side of the transformer is 2.2 seconds, while for a fault on the 20kV side, it is 7 seconds on Circuit Breaker 2 and 26 seconds on Circuit Breaker 1.Relai proteksi berfungsi untuk mendeteksi gangguan atau kondisi ketidaknormalan pada sistem tenaga listrik, dengan tujuan mengisolasi gangguan, menghilangkan kondisi tidak normal, serta menghasilkan sinyal atau indikasi. Salah satu relai proteksi yang digunakan di gardu induk adalah Over-Current Relay (OCR) dan Ground Fault Relay (GFR). Pemeliharaan rutin OCR dan GFR biasanya dilakukan melalui pengaturan ulang (setting) atau penggantian relai. Namun, proses pemeliharaan selama ini dilakukan secara manual menggunakan alat uji khusus, dengan hasil yang dicatat secara manual ke dalam formulir, yang kemudian didigitalisasi. Prosedur ini dinilai kurang efektif. Penelitian ini mengembangkan aplikasi pemeliharaan relai berbasis web menggunakan metode waterfall. Metode ini dipilih karena pendekatannya yang terstruktur, dokumentasi yang lengkap, serta kestabilan dalam biaya dan waktu pengerjaan. Hasil pengujian menunjukkan bahwa sistem berbasis web yang dikembangkan berfungsi sesuai dengan fungsionalitas yang diharapkan. Berdasarkan survei pengguna, aplikasi ini terbukti memudahkan dan meningkatkan efektivitas petugas dalam melakukan pemeliharaan relai. Nilai hasil setting OCR dan GFR dari aplikasi ini disimulasikan menggunakan aplikasi ETAP 19.01 untuk skenario gangguan hubung singkat. Hasil simulasi menunjukkan bahwa relai bekerja sesuai dengan karakteristik standar invers. Waktu trip relai untuk gangguan pada sisi 150kV transformator adalah 2,2 detik, sedangkan untuk gangguan pada sisi 20kV transformator adalah 7 detik pada Circuit Breaker 2 dan 26 detik pada Circuit Breaker
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
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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