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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) Justek : Jurnal Sains Dan Teknologi
Elfi Yuliza
University of Bengkulu
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Education Materials Science & Nanotechnology Mathematics Physics

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Rancang Bangun Simulator Gelombang Laut Skala Laboratorium Berbasis Motor DC Vionita Vionita; Vera Fuspita Sari; Riska Ekawita; Elfi Yuliza
Justek : Jurnal Sains dan Teknologi Vol 5, No 2 (2022): November
Publisher : Unversitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/justek.v5i2.9720

Abstract

Abstract:  An understanding of the characteristics and parameters of ocean wavescan help to explan and develop the potential of ocean waves. One of the efforts thatcan be done in understanding the characteristics of ocean waves is to use a simulator of ocean waves. In this study, a laboratory scale ocean wave simulator was designed. This simulator is equipped with a wave generator system in the form of a DC motor and was developed with a size of 120 cm x 25 cm x 20 cm. The simulator performance test was carried out by varying the speed of theDC motor and the depth of the water to determine the effect on the parameters of the waves formed. The wave parameters measured are the height and the wavelength. The results show that the designed ocean wave simulator can produce waves that resemble a sinosuidal curve. The measured wave height on the simulator is directly proportional to the water depth. While the wavelengthis inversely proportional to the speed of the DC motor.Abstrak: Pemahaman mengenai karakteristik dan parameter gelombang laut dapat membantu dalam memahami dan mengembangkan potensi gelombang laut. Salah satu upaya yang dapat dilakukan dalam memahami karakteristik gelombang laut adalah dengan memanfaatkan simulator gelombang laut. Pada penelitian ini dilakukan rancang bangun simulator gelombang laut skala laboratorium.  Simulator ini dilengkapi dengan sistem pembangkit gelombang berupa motor DC dan dikembangkan dengan ukuran 120 cm x 25 cm x 20 cm. Pengujian performa simulator dilakukan dengan memvariasikan kecepatan motor DC dan kedalaman air untuk mengetahui pengaruhnya terhadap parameter gelombang yang terbentuk. Parameter gelombang yang diukur adalah tinggi dan panjang gelombang. Hasil penelitian menunjukkan simulator gelombang laut yang dirancang dapat menghasilkan gelombang yang menyerupai kurva sinosuidal. Tinggi gelombang yang terukur pada simulator berbanding lurus dengan kedalaman air. Sedangkan panjang gelombangnya berbanding terbalik dengan kecepatan motor DC.
Pemodelan Struktur Permukaan 2D Kota Bengkulu Menggunakan Metode Geomagnet Rama Ramdani; Refrizon Refrizon; Elfi Yuliza; Darmawan Ikhlas Fadli; Muhamad Hasan
Jurnal Penelitian Pendidikan IPA Vol 9 No 2 (2023): February
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i2.2914

Abstract

Research on 2D modeling of the subsurface structure of the Bengkulu city area was carried out using the geomagnetic method. In this study, we collected data from 130 measurement points using a set of Proton Procession Magnetometers (PPM) to obtain the total magnetic field value. The measurement data were processed by making corrections of daily variations and IGRF (International Geomagnetic Reference Field). We conducted data correction to contour the total magnetic field anomaly. After that, the contour of total magnetic field anomaly was used for the reduction to the poles. This research results from the total magnetic field anomaly show a pair of positive and negative closures. Cross-sections were made on the positive and negative closure pairs to determine the subsurface structure of the area by making a 2-dimensional (2D) model using Mag2DC software. The interpretation of the 2D modeling results shows that three rock layers are continuously arranged. The average susceptibility value of the first layer is 0.00001 cgs which is a sandstone layer at a depth of 0-400 meters; the second layer has an average susceptibility value of 0.002 cgs which is dominated by clay at a depth of 400-700 meters, and; the third layer has an average susceptibility value of 0.006 cgs which is a basalt rock layer at a depth of 700-1000 meters.
Co-Authors Darmawan Ikhlas Fadli Muhamad Hasan Rama Ramdani Refrizon Refrizon Riska Ekawita Vera Fuspita Sari Vionita Vionita