1,721,153 research outputs found
Fisika batuan: pendekatan estimasi permeabilitas dan saturasi air berbasiskan data seismik
No full textBuku ini mengajukan suatu rumusan mengekstrak data seismik untuk memperoleh informasi parameter reservoar yaitu permeabilitas dan saturasi air. Ada tiga metode estimasi permeabilitas yang dapat mengekstrak permeabilitas yang terkandung di dalam gelombang seismik dan metode estimasi saturasi air pada data seismik melalui persamaan Biot-Turgut-Yamamoto-Sismanto dengan berbasiskan data seismi
Fisika Batuan: Pendekatan Estimasi Permeabilitas dan Saturasi Air Berbasiskan Data Seismik
No full textInformasi tentang bentuk struktur dan kondisi bawah permukaan menjadi jelas karena adanya data
seismik yang telah dimanfaatkan oleh ahli-ahli eksplorasi lebih dari setengah abad terakhir. Ribuan
sumur-sumur minyak dan gas bumi telah diketemukan di dunia ini, dan jasa metode seismik dalam
penemuan itu tidak dapat diabaikan. Walaupun terdapat keterbatasan-keterbatasan di dalam metode
seismik, terutama tentang resolusi data seismik, namun para ahli mulai sibuk dan berusaha untuk
mengekstrak informasi-informasi data seismik yang lebih rinci dari pada sekedar bentuk struktur dan
sistem perlapisan seperti yang selama ini dimanfaatkan. Informasi-informasi yang dimaksud adalah
parameter-parameter petrofisika dari batuan reservoar yang berada di bawah permukaan seperti, porositas,
permeabilitas, saturasi air (fluida), densitas, tekanan dan temperatur. Untuk mendapatkan informasi
tersebut metode konvensional yang sering dilakukan adalah melalui pengambilan inti pengeboran (coring)
dan data log. Dapat dipahami bahwa nilai-nilai parameter reservoar tersebut mempunyai pengaruh yang
cukup berarti terhadap bentuk dan perilaku gelombang seismik yang melalui reservoar tersebut yang
terekam oleh detektor di permukaan. Teknologi seismik yang kini telah berkembang begitu pesat
mengarah pada seismik lithologi dan petrofisika yang mampu menghasilkan informasi-informasi yang
lebih detil dan akurat, sehingga seringkali data-data seismik masa lalu diproses ulang untuk dikaji lebih
mendalam. Data seismik permukaan telah digunakan seoptimal mungkin untuk memperkirakan karakter
lithologi suatu jenis batuan reservoar bawah permukaan, seperti kandungan fluida, porositas,
permeabilitas beserta sifat-sifat fisikanya untuk keperluan eksplorasi dan eksploitasi migas secara efektif
dan efisien.
Kali ini penulis mengajukan suatu rumusan mengekstrak data seismik untuk memperoleh informasi
parameter reservoar yaitu permeabiltas dan saturasi air. Terlepas dari berbagai faktor kendala baik yang
ada di lapangan maupun di pusat pengolahan data penulis telah dapat diturunkan tiga metoda estimasi
permeabilitas yang dapat mengekstrak permeabilitas yang terkandung di dalam gelombang seismik dan
metode estimasi saturasi air pada data seismik melalui persamaan Biot –Turgut – Yamamoto – Sismanto dengan berbasiskan data seismik. Konsep pendekatan yang diajukan penulis sangat menjanjikan untuk
dikembangkan ke arah pemanfaatan secara komersial di dunia industri eksplorasi perminyakan
ANALISIS MISKONSEPSI DALAM MATERI ASAM BASA MELALUI LABORATORY JARGON PADA MAHASISWA PENDIDIKAN KIMIA
Get PDFABSTRAK
Agus Sismanto. Analisis Miskonsepsi dalam Materi Asam Basa Melalui Laboratory Jargon pada Mahasiswa Pendidikan Kimia. Skripsi. Jakarta: Program Studi Pendidikan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Jakarta. Februari 2021.
Penelitian ini bertujuan untuk mengetahui miskonsepsi mahasiswa calon guru kimia serta mengetahui apakah ada perbedaan antara tingkat akademik mahasiswa dengan tingkat miskonsepsi melalui analisis Laboratory Jargon pada materi asam basa. Sampel yang digunakan adalah mahasiswa pendidikan kimia tahun akademik 2016 sampai dengan tahun akademik 2019 berjumlah 245 mahasiswa. Metode penelitian yang digunakan adalah metode survey kuantitatif. Data penelitian yang diperoleh antara lain jawaban kuesioner Laboratory Jargon, pertanyaan terbuka dan wawancara mahasiswa. Persentase miskonsepsi rata- rata mahasiswa adalah 42,20%. Kesimpulan yang didapat pada penelitian ini adalah terdapat perbedaan antara tingkat akademik mahasiswa dengan miskonsepsi asam basa mahasiswa calon guru jika dianalisis melalui analisis Laboratory Jargon. Berdasarkan hasil pertanyaan terbuka dan wawancara diperoleh bahwa miskonsepsi asam basa disebabkan mahasiswa calon guru kimia masih membawa konsep sewaktu SMA yaitu adanya beberapa mahasiswa yang memilih pernyataan Laboratory Jargon.
Kata Kunci: Laboratory Jargon, Miskonsepsi, Asam Basa, Survey.
ABSTRACT
Agus Sismanto. Analysis of Misconceptions in Acid-Base Matter Through Laboratory Jargon in Chemistry Education Students. Thesis. Jakarta: Program Studi Pendidikan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Jakarta. February 2021.
This study aims to determine the misconceptions of chemistry students and to determine whether is there a difference between the academic level of students and the level of misconception through Laboratory Jargon analysis on acid-base material. The sample used is the chemistry education students from the 2016 academic year to the 2019 academic year totaling of 245 students. The research method used is a quantitative survey method. The research data obtained include answers to Laboratory Jargon questionnaires, open-ended questions and student interviews. The average misconception percentage of students is 42.20%. The conclusion obtained in this study is that there is a difference between the academic level of students with acid-base misconceptions of chemistry students when analyzed through Laboratory Jargon. Based on the results of open-ended questions and interviews, it was found that the acid-base misconception was caused by chemistry student who still carries the concept during high school, namely that some students chose Laboratory Jargon statements.
Keywords: Laboratory Jargon, Misconceptions, Acid Bases, Surve
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
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