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All Journal Science and Technology Indonesia Charm Sains : Jurnal Pendidikan Fisika Jurnal Ilmu dan Inovasi Fisika
Yudhiakto Pramudya
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Education Electrical & Electronics Engineering Energy Environmental Science Materials Science & Nanotechnology Physics

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Surface Wave Topography using The 4 Point FDM Simulator Adi Jufriansah; Yudhiakto Pramudya; Arief Hermanto; Azmi Khusnani
Science and Technology Indonesia Vol. 5 No. 4 (2020): October
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3343.798 KB) | DOI: 10.26554/sti.2020.5.4.117-120

Abstract

The 2D topography proffers a new challenge of modeling surface waves with a 4-point finite difference (FDM) model. Topographic representation of wave propagation over a certain area will result in loss of accuracy of the numerical model. Then from this the need for appropriate modifications to reduce calculation errors. The existing approach requires value representation as an internal extrapolation solution for temporary exterior conditions. It is finally by providing boundary conditions and initial conditions in the system. However, the scheme sometimes becomes unstable for very irregular topography. 1D extrapolation along the parallel path is known to produce a simple and efficient scheme. During extrapolation, the stability of the 1D hyperbolic Schema improved by disregarding the nearest interior boundary point, which is less than half the lattice distance. Given the limited difference so that the stencils from both sides of the central evaluation point can be used as a 2D form modification if there are not enough inside points. So that in propagation space, waves that move and change according to changes in time. It will be following the wave nature of one source that travels in the x and y fields whose amplitude will change exponentially against propagation time. It is by the nature of surface wave motion.
Studi Perbandingan Tingkat Kecerahan Langit Dengan Menggunakan Kamera Smartphone dan Sky Quality Meter berbantuan Tracker Ruslin Zainal Baiddiun; Yudhiakto Pramudya; Okimustava Okimustava
JIIF (Jurnal Ilmu dan Inovasi Fisika) Vol 5, No 1 (2021)
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (500.038 KB) | DOI: 10.24198/jiif.v5i1.31187

Abstract

Pengukuran kecerahan langit memiliki daya tarik yang sangat besar bagi astronom pemula. Berbagai metode dan cara digunakan dalam menentukan tingkat kecerahan langit. Langit yang gelap dengan benda-benda langit yang jelas terlihat merupakan kondisi langit yang cerah. Penelitian ini dilakukan di Yogyakarta selama 8 malam, pada malam Bulan tidak tampak di ufuk. Pengambilan data dilakukan dengan menggunakan SQM (Sky Quality Meter) dan kamera Smartphone berbantuan Software Tracker. Dalam penelitian ini, penggunaan SQM (Sky Quality Meter) merupakan pembanding dari data yang dihasilkan oleh gambar dari Smartphone yang ekstrak dengan menggunakan Software Tracker. Data kedua alat ukur tersebut berbeda, hal ini dapat dilihat dari perbedaan hasil keluaran data yang dihasilkan, pada SQM (sky Quality Meter) memiliki data keluaran berupa MPSAS (mag/arcsec2) sedangkan pada Software Tracker, data keluaran berupa luminance (cd/m2). Berdasarkan hasil penelitian menunjukan bahwa kecerahan langit yang ditunjukan berdasarkan data SQM adalah tingkat gelapnya malam, sedangkan pada kamera Smartphone berbantuan Software Tracker menghasilkan nilai Luminance (cd/m2) menunjukan tingkat pencahayaan yang ada pada wilayah yang diamati.
PENGEMBANGAN SENSOR WARNA BERBASIS ARDUINO UNTUK DETEKSI WARNA KARET RSS Sihabuddin, Aspina; Yudhiakto Pramudya
Charm Sains: Jurnal Pendidikan Fisika Vol 6 No 2 (2025): JUNI
Publisher : Program Studi Pendidikan Fisika Jurusan Fisika Fakultas Matematika, Ilmu Pengetahuan Alam, dan Kebumian (FMIPAK), Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53682/charmsains.v6i2.446

Abstract

The quality of rubber products, particularly Ribbed Smoked Sheet (RSS), is crucial for Indonesia's automotive industry. Currently, quality assessment at PT KMS Rubber Factory relies on visual inspection, leading to subjective and inconsistent results. To address this, this study developed an RRS color detection system using a TCS3200 sensor and Arduino. The research followed a waterfall methodology, with testing conducted at Ahmad Dahlan University and PT KMS using RRS samples of varying quality. Results showed that the TCS3200 sensor effectively detected color variations with reasonable accuracy, though unstable lighting conditions affected performance. The use of a black box significantly minimized external light interference. Additionally, the study revealed that the factory’s RRS quality was actually categorized as RRS 2 and RRS 3, contrary to workers' visual assessment, which had classified it as RRS 1. This system offers an efficient solution for the rubber industry, particularly for small producers and farmers, to enhance quality control. Furthermore, the device serves as a practical educational tool for learning about color, light, and sensor technology. Thus, this innovation has strong potential to improve rubber product quality and production efficiency in Indonesia.
Co-Authors Adi Jufriansah Arief Hermanto Azmi Khusnani Okimustava Okimustava Ruslin Zainal Baiddiun Sihabuddin, Aspina