1,720,954 research outputs found
Analisis Hubungan Tutupan Lahan terhadap Debit Aliran di Sub DAS Ngrowo-Ngasinan Menggunakan Citra Landsat 8 OLI/ TIRS
No full textDAS memiliki peran yang sangat penting bagi ekosistem perairan di sekitarnya. Salah satu sub DAS yang masuk ke dalam sistem DAS Brantas di Jawa Timur adalah sub DAS Ngrowo-Ngasinan. Sub DAS ini masuk ke dalam tiga kabupaten yakni Kabupaten Tulungagung, Kabupaten Trenggalek dan Kabupaten Ponorogo. Salah satu sistem DAS Brantas yang menampung air limpasan bagi DTA adalah Waduk Wonorejo di Kabupaten Tulungagung. Beberapa tahun terakhir, waduk ini mengalami permasalahan yakni fluktuasi debit air. Hal tersebut mengakibatkan masalah terhadap produksi energi listrik di PLTA Wonorejo. Masalah tersebut diduga akibat adanya perubahan tutupan lahan pada DTA di sekitar waduk tersebut. Informasi mengenai perubahan tutupan lahan dari tahun ke tahun diperlukan untuk memantau perubahan tutupan lahan pada daerah tersebut.
Tujuan dari penelitian ini adalah untuk memetakan kelas tutupan lahan di sub DAS Ngrowo-Ngasinan di Kabupaten Tulungagung pada tahun 2014, 2016 dan 2018 dengan mengklasifikasikan jenis tutupan lahan sehingga didapatkan informasi mengenai besarnya luas tutupan lahan. Setelah mendapatkan nilai besarnya luas tutupan lahan maka perubahan luas tutupan lahan dapat diketahui. Apabila perubahan tutupan lahan telah didapatkan maka dapat diketahui pengaruhnya terhadap nilai debit aliran di sub DAS Ngrowo-Ngasinan.
Metode dalam penelitian ini menggunakan metode klasifikasi supervised, metode aljabar dan metode rasional. Metode klasifikasi supervised memerlukan pembuatan training area untuk setiap kelas yang akan diklasifikasikan. Klasifikasi digolongkan menjadi beberapa kelas yaitu air, hutan, tegalan, pemukiman, ladang dan sawah. Metode rasional digunakan untuk memperoleh nilai curah hujan dan menghitung nilai koefisien run off sedangkan metode rasional digunakan untuk menghitung nilai debit aliran. Penelitian ini menggunakan tekonologi penginderaan jauh berupa data citra landsat 8 yang harus dilakukan pengolahan data terlebih dahulu.
Hasil yang didapatkan dari penelitian ini adalah terjadi penurunan luas hutan di tahun 2014 – 2016 dan 2016 – 2018. Pada tahun 2014 luas hutan sebesar 19.975 ha, tahun 2016 sebesar 18.912 ha dan tahun 2018 sebesar 15.981 ha. Luas ladang mengalami peningkatan dari tahun 2014 sampai tahun 2018. Pada tahun 2014 luas ladang sebesar 11.640 ha, tahun 2016 sebesar 11.973 ha dan tahun 2018 sebesar 15.548 ha. Penurunan luas hutan diakibatkan oleh pembukaan lahan baru sebagai sektor pertanian masyarakat. Luas tegalan mengalami peningkatan dan penurunan yang diakibatkan oleh faktor curah hujan. Pada tahun 2014 luas tegalan sebesar 11.286 ha, tahun 2016 sebesar 12.084 ha dan tahun 2018 sebesar 11.528. Tutupan lain yang mengalami fluktuasi akibat dari curah hujan adalah kelas air.
Pada tahun 2014 luas permukaan air sebesar 368 ha, tahun 2016 sebesar 384 ha dan tahun 2018 sebesar 379 ha. Luas pemukiman mengalami peningkatan dari tahun 2014 sampai 2018. Pada tahun 2014 luas pemukiman sebesar 3.599 ha, tahun 2016 sebesar 3.642 ha dan tahun 2018 sebesar 3.995 ha. Luas sawah mengalami penurunan selama tahun 2014 sampai 2018. Pada tahun 2014 luas sawah sebesar 18.761 ha, tahun 2016 sebesar 18.634 ha dan tahun 2018 sebesar 18.198 ha. Penurunan luas sawah diduga beralih fungsi menjadi pemukiman karena perluasan pembangunan. Hasil pengujian akurasi didapatkan pada tahun 2014 sebesar 94,90%, tahun 2016 sebesar 92,34% dan tahun 2018 sebesar 94,75%. Hasil perhitungan koefisien run off didapatkan debit aliran terbesar pada tahun 2018 sebesar 16,07 m3/s, sedangkan pada tahun 2016 debit aliran sebesar 12,1 m3/s dan tahun 2014 sebesar 11,48 m3/s. Sedangkan hasil perhitungan koefisien run off dari data luas hutan Dinas Kehutanan Provinsi Jawa Timur didapatkan debit aliran pada tahun 2014 sebesar 11,38 m3/s, tahun 2016 sebesar 11,81 m3/s dan tahun 2018 sebesar 15,38 m3/s. Perubahan debit aliran dipengaruhi oleh perubahan tutupan lahan khususnya hutan dan tegalan dan dipengaruhi oleh curah hujan wilayah. Berkurangnya luas hutan dan meningkatnya luas ladang mengakibatkan daerah resapan air pada sub DAS Ngrowo-Ngasinan berkurang. Hal tersebut mengakibatkan air limpasan yang jatuh di permukaan masuk ke dalam sungai dan mengalir ke tempat yang lebih rendah
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
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
- …
