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Prediksi keberadaan lapisan Batubara menggunakan metode resistivitas konvigurasi winner-schlumberger pada daerah Samboja, Kabupaten Kutai Kartanegara, Kalimantan Timur
Get PDFTelah dilakukan penelitian menggunakan metode geolistrik resistivitas menggunakan konfigurasi
wenner-schlumberger untuk mendeteksi keberadaan lapisan batubara di daerah Samboja,
kabupaten Kutai Kartanegara, Kalimantan Timur. penelitian ini bertujuan untuk mendapatkan
geometri, kemenerusan lapisan, dan ketebalan dari batubara di daerah penelitian berdasarkan
nilai resistivitas batuan. Data yang digunakan adalah data sekunder berupa nilai beda potensial
(V), arus listrik (I), faktor geometri, topografi, dan koordinat pengukuran.
Daerah Samboja Kabupaten Kutai Kertanegara, Kalimantan Timur merupakan wilayah yang
cukup besar dan masih berupa hutan belantara. Secara geologi potensi batubara di daerah
Samboja Kuala dan sekitarnya cukup besar. Pada penelitian ini digunakan sebanyak 20 lintasan
pengukuran geolistrik konfigurasi wenner-schlumberger dengan panjang lintasan 200 meter.
Arah lintasan bervariasi mengikuti pola dari indikasi persebaran batubara dipermukaan.
Peralatan yang digunakan adalah automatic resistivitymeter yang mengukur nilai resistivitas
batuan di bawah permukaan secara otomatis. Dari data sekunder dilakukan pengolahan data
menggunakan perangkat lunak Ms. Excel untuk menyusun data lapangan dan selanjutnya
dipindahkan dalam bentuk format *txt. Untuk mendapatkan hasil heterogentias bawah
permukaan maka dilakukan proses inversi (pemodelan kebelakang) menggunakan software
Res2DInv buatan Geotomo software. Dari hasil inversi akan didapatkan penampang resistivitas
2D yang menggambarkan keberadaan batubara dibawah permukaan.
Hasil interpretasi data dapat disimpulkan bahwa batubara terletak pada Formasi Kampung Baru
yang berumur Miosen Akhir sampai Pliosen Awal dengan lingkungan pengandapan rawa hingga
delta..interpretasi profil 2D yang menunjukan pola lapisan batubara memiliki nilai resistivitas
berkisar antara 400-700 Ohm.m, resistivitas lapisan batulempung berkisar antara 10-30 Ohm.m.
Kedalaman serta ketebalan lapisan batubara bervariasi dari setiap lintasan pengukuran, dengan
kedalaman yang berkisar 40-50 m dari permukaan . Serta ketebalan lapisan batubara
diperkirakan antara 3-6 meter.
Kata Kunci : resistivitas, wenner-schlumbrger, batubara
ABSTRACT
PREDICTION OF COAL SEAMS PRESENCE USING RESISTIVITY METHODS WENNERSCHLUMBERGER
CONFIGURATION ON SAMBOJA, KERTANEGARA KUTAI DISTRICT,
EAST BORNEO
Dhamas Swastyayana Putra
115 090 025
Have been geoelectric method research using Wenner - Schlumberger array to detect the
presence of coal seams in the area Samboja , Kutai Kartaangera regency , South Borneo . This
study aims to get geometry , continiou of layer , and the thickness of the coal in the study area
based on the value ressitivitas rocks . The data used are secondary data from the value of the
potential difference (V) , current (I) , geometry factor , topography , and coordinate
measurement .
Samboja, Kutai Kertanegara Regency , East Kalimantan is a fairly large area and still a
wilderness . The geology of coal reserves in the area and surrounding Kuala Samboja big
enough . This research used the track as much as 20 geoelectric measurements Wenner -
Schlumberger array with a line length of 200 meters . Directions trajectory varies following the
pattern of distribution of coal surface indications. The equipment used is automatic
resistivitymeter which measures the resistivity value of rocks below the surface automatically. Of
secondary data using a data processing software Ms . Excel to collate the data field and then
transferred in the form of * txt format . To get the heterogentias subsurface inversion process is
carried out (modeling backward) using software Res2DInv software Geotomo software . From
the inversion results will be obtained 2D resistivity cross section depicting the presence of coal
below the surface .
The results of the interpretation of the data it can be concluded that the coal is located at
Kampung Baru Formation Late Miocene to Early Pliocene pengandapan environment. delta
swamps to interpretation of 2D profiles which show the pattern of the coal seam has resistivity
values ranging between 400-700 Ohm.m , mudstone layer resistivity ranged between 10-30
Ohm.m. The depth and thickness of coal seams varies from each trajectory measurements , with
depths ranging from 40-50 m from the surface. As well as the thickness of the coal seam is
estimated between 3-6 meters .
Keyword : resistivity, wenner-schlumberger, coa
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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