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All Journal Jurnal Pendidikan Fisika Indonesia Jurnal Geologi dan Sumberdaya Mineral Journal of Languages and Language Teaching
R. Setiawan
Fakultas Sains dan Matematika Universitas Diponegoro (UNDIP), Semarang, Indonesia
Education Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Physics

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Rancang Bangun Sistem Penangkap Gambar Radiograf Digital Berbasis Kamera DSLR -, Susilo; -, Supriyadi; -, Sutikno; -, Sunarno; Setiawan, R.
Jurnal Pendidikan Fisika Indonesia Vol 10, No 1 (2014): January 2014
Publisher : Physics Department, Faculty of Mathematics and Natural Sciences, Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v10i1.3052

Abstract

Telah dilakukan modifikasi sistem penangkap gambar kedap cahaya yang dapat menampilkan langsung citra radiograf digital pada layar monitor PC dan menyimpan file radiograf tersebut sehingga bisa ditampilkan kembali. Penelitian ini bertujuan membangun model prototip sistem penangkap gambar berbasis kamera digital, sehingga hasilnya bisa diproses lebih lanjut menggunakan perangkat lunak pengolah citra berbasis Matlab. Hasil pemotretan dengan sinar-X pada benda uji dan volunteer digunakan untuk menguji keajegan hasil radiograf tersebut, dan diperoleh perbaikan kontras yang signifikan, ditunjukkan dengan tampilan histogram, nilai MSE dan PSNR yang sesuai. Aplikasi perangkat lunak tersebut dalam menganalisis radiograf benda uji, kaki, tangan serta stepwedge menunjukkan juga kenaikan ukuran file, kontras radiograf dan resolusi citra yang meningkat. Hasil ini menunjukkan bahwa model penangkap gambar yang dilengkapi dengan perangkat lunak berbasis Matlab dapat dikembangkan untuk pemeriksaan radiografi digital yang efektif, efisien dan mempunyai nilai ekonomi yang tinggi. It has been modified a system of light-tight image capturing which can display directly digital radiograph image on the monitor screen of PC and save that radiograph digital image for re-displaying it. This research aims to build a prototype of digital camera based-image capturing, so that the result can be processed further using a mathlab based-image processing software. The imaging process using X-ray on the test materials and volunteers are used to investigate its image consistency and find more contrast image, shown on the histogram, appropriate MSE and PSNR values. The application of this software for analyzing test materials, feet, hands and stepwdge showed the file size increase, radiograph constrast, and image resolution. This result shows that a model of image capturing completed by software based-mathlab can be developed to check an effective, efficient and has an economic value digital radiography test result.
Rancang Bangun Sistem Penangkap Gambar Radiograf Digital Berbasis Kamera DSLR -, Susilo; -, Supriyadi; -, Sutikno; -, Sunarno; Setiawan, R.
Jurnal Pendidikan Fisika Indonesia Vol 10, No 1 (2014)
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v10i1.3052

Abstract

Telah dilakukan modifikasi sistem penangkap gambar kedap cahaya yang dapat menampilkan langsung citra radiograf digital pada layar monitor PC dan menyimpan file radiograf tersebut sehingga bisa ditampilkan kembali. Penelitian ini bertujuan membangun model prototip sistem penangkap gambar berbasis kamera digital, sehingga hasilnya bisa diproses lebih lanjut menggunakan perangkat lunak pengolah citra berbasis Matlab. Hasil pemotretan dengan sinar-X pada benda uji dan volunteer digunakan untuk menguji keajegan hasil radiograf tersebut, dan diperoleh perbaikan kontras yang signifikan, ditunjukkan dengan tampilan histogram, nilai MSE dan PSNR yang sesuai. Aplikasi perangkat lunak tersebut dalam menganalisis radiograf benda uji, kaki, tangan serta stepwedge menunjukkan juga kenaikan ukuran file, kontras radiograf dan resolusi citra yang meningkat. Hasil ini menunjukkan bahwa model penangkap gambar yang dilengkapi dengan perangkat lunak berbasis Matlab dapat dikembangkan untuk pemeriksaan radiografi digital yang efektif, efisien dan mempunyai nilai ekonomi yang tinggi. It has been modified a system of light-tight image capturing which can display directly digital radiograph image on the monitor screen of PC and save that radiograph digital image for re-displaying it. This research aims to build a prototype of digital camera based-image capturing, so that the result can be processed further using a mathlab based-image processing software. The imaging process using X-ray on the test materials and volunteers are used to investigate its image consistency and find more contrast image, shown on the histogram, appropriate MSE and PSNR values. The application of this software for analyzing test materials, feet, hands and stepwdge showed the file size increase, radiograph constrast, and image resolution. This result shows that a model of image capturing completed by software based-mathlab can be developed to check an effective, efficient and has an economic value digital radiography test result.
COALBED METHANE POTENTIAL AND COAL CHARACTERISTICS IN MUARA LAKITAN AREA, SOUTH SUMATRA Hermiyanto, Muhammad Heri; Setiawan, R.
Jurnal Geologi dan Sumberdaya Mineral Vol 20, No 3 (2010): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2986.65 KB)

Abstract

A research on Coal Bed Methane (CBM) of the Muaraenim Formation has been conducted in the Muara Lakitan area. Megascopically, the coal lithotype varies from dull to bright banded, with black – brownish black and brownish to black streaks, brittle – friable, dull-greasy luster, even-uneven, dirty on fingers, with resin patch and striation, dirt bands (clay/mud layers), pyrite striation, and pore structures. The coal quality, gained from geochemical analysis, indicates that its ash content ranges between 1.22% and 2.47%, total sulphur content is from 0.15% to 0.3 %, and the volatile matter of 38.02% - 40.81%. The coal is dominated by vitrinite (73.6 – 85.8 %), with minor amount of exinite (1.4 – 4.0 %), inertinite (4.2 – 21 % ) and mineral matter (2.4 – 8.2 %). Vitrinite reflectance, varies from 0.44% to 0.45 %, tends to indicate a sub-bituminous to high volatile bituminous-A coal rank. Kaolinite clays are the most prominent mineral matter within all coal samples analyzed, although the clay textures show irregular shapes. Iron oxides are also present in several samples. Microcleats found within the coals are mostly open, and are rarely filled by clay minerals. Based on Barbara/Winter diagram, the methane gas content in the studied area ranges from 0.57 m3/t – 1.70 m3/t = 20.44 scf/t – 60.96 scf/t. The total reserve of gas within six coal seams in the studied area is 15.524,28 scf.Keywords : Coal Bed Methane (CBM), Muaraenim Formation, Muara Lakitan
FOSTERING A NATURAL ATMOSPHERE; IMPROVING STUDENTS’ COMMUNICATION SKILL IN A BUSINESS MEETING Agustina, Lia; Setiawan, R.
Journal of Languages and Language Teaching Vol 8, No 3 (2020): In Press
Publisher : IKIP Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/jollt.v8i3.2746

Abstract

Engaging a fun class  creates a positive classroom atmosphere. Research has indicated that if a positive classroom atmosphere is created, students will have a better learning and engage more, which means, it is one of the most effective and powerful tools teachers can use to encourage students learning. Oral Communication skill is essential for thinking and learning. By getting the knowledge of it, students would be able to express information, opinions, understand concepts, and would be able to discuss experience and  knowledge. The researcher used an Action Research Method. The purpose was used to see the improvement of the students?ability to speak up. The subject was 32 students of Accountant Department ? State Polytechnic of Malang. The result of the study showed that most students showed an improvement in all four language skills but speaking skill had the greatest improvement.
Co-Authors Lia Agustina, Lia Muhammad Heri Hermiyanto, Muhammad Heri Sunarno - Supriyadi - Susilo - Sutikno -