1,720,957 research outputs found
Dynamic Optimal Power Flow Pada Sistem Microgrid Mempertimbangkan Uncertainty Dan Baterai Management Sistem Menggunakan Whale Optimization
No full textOptimalisasi pembangkitan daya (Optimal Power Flow) tetap menjadi isu penting dalam operasi sistem tenaga listrik, seiring tuntutan efisiensi ekonomi dan kepedulian lingkungan. Selain mengejar biaya pembangkitan minimum (Economic Dispatch), integrasi energi terbarukan juga menjadi perhatian utama, meski menghadirkan tantangan intermitensi dan ketidakpastian. Karena itu, diperlukan pendekatan optimasi yang adaptif terhadap dinamika sistem dan integrasi energi terbarukan secara efektif. Penelitian ini mengusulkan penggunaan Improved Whale Optimization Algorithm (IWOA) dengan bobot adaptif berbasis Fuzzy Logic Controller untuk menyelesaikan permasalahan optimasi non-linier dan kompleks. Sistem tenaga dimodelkan selama 24 jam operasi, dengan integrasi Photovoltaic, Energy Storage (ES), dan Wind Turbine guna meningkatkan efisiensi dan keandalan. ES menyimpan energi saat surplus dan menyuplainya saat beban puncak untuk mengurangi beban pembangkit termal dan emisi karbon. Wind Turbine dimodelkan melalui fungsi biaya kompetitif berbasis distribusi Weibull serta mempertimbangkan pajak karbon guna mendorong pertumbuhan energi terbarukan. Hasil simulasi menunjukkan bahwa IWOA mampu menghasilkan biaya pembangkitan harian yang lebih rendah (selisih US25/hari), iterasi lebih sedikit (20 vs 26), dan solusi yang lebih stabil dibandingkan WOA standar. Model ini juga menjaga keseimbangan pengisian dan pengosongan ES secara akurat, dengan State of Charge akhir yang konsisten dengan nilai awal. Penggunaan model biaya energi angin berbasis distribusi Weibull terbukti memberikan estimasi biaya yang lebih akurat dibandingkan pendekatan Levelized Cost of Energy konvensional. Dengan kebijakan pajak karbon sebesar US50/MWh, simulasi menunjukkan bahwa pembangkit angin dapat menyuplai hingga 50% dari kapasitas terpasang harianya dan bersaing secara ekonomi dengan pembangkit berbahan bakar fosil.
===================================================================================================================================
Optimal power generation (Optimal Power Flow) remains a critical issue in power system operations, driven by the increasing demands for economic efficiency and environmental sustainability. In addition to minimizing generation costs (Economic Dispatch), the integration of renewable energy sources has become a central focus, despite the inherent challenges of intermittency and supply uncertainty. Therefore, an optimization approach that can adapt to system dynamics and effectively accommodate renewable energy integration is essential. This study proposes the use of an Improved Whale Optimization Algorithm (IWOA) with adaptive weights generated by a Fuzzy Logic Controller to solve complex and non-linear optimization problems. The power system is modeled over a 24-hour operational period, incorporating Photovoltaic (PV), Energy Storage (ES), and Wind Turbine systems to enhance overall efficiency and reliability. The ES is utilized to store surplus energy and discharge it during peak demand periods, aiming to reduce the load on thermal generators and lower carbon emissions. Wind turbines are modeled with a more competitive cost function using the Weibull distribution and incorporating carbon tax considerations to promote renewable energy growth. Simulation results indicate that IWOA produces a lower daily generation cost (by US25/day), requires fewer iterations (20 vs. 26), and yields more stable solutions compared to the standard WOA. The model also accurately maintains the balance of charging and discharging within the ES, with the final State of Charge (SoC) matching the initial level. Moreover, the wind energy cost model based on the Weibull distribution provides a more accurate cost estimate than the conventional Levelized Cost of Energy (LCOE) approach. With a carbon tax policy of US50/MWh, simulations show that wind power can supply up to 50% of its installed daily capacity and compete economically with fossil-fuelbased generator
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
- …
