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All Journal Komunikasi Fisika Indonesia Unri Conference Series: Community Engagement
Antonius Surbakti
Universitas Riau
Humanities Earth & Planetary Sciences Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics

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VISUALISASI POTENSIAL LISTRIK DI ANTARA DUA PLAT SEJAJAR BERHINGGA DENGAN PROGRAM KOMPUTER BERBASIS MATLAB Eviliony Eviliony; Erwin Erwin; Antonius Surbakti
Komunikasi Fisika Indonesia Vol 15, No 1 (2018)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (149.069 KB) | DOI: 10.31258/jkfi.15.1.13-16

Abstract

The calculation of electric potential between two parallel plates with finite size is difficult work, visualization of the issue comprehensively is needed. In this paper, visualization of electric potential between two parallel plates with finite size has been done by developing a MATLAB based computer program. The electric potential was calculated by solving two dimensional Laplace equation. There are two parts of the program that have been developed, the menu program and the main program. The menu program was provided to store the input data required in the calculation. While, the main program served toperform calculations and visualization of the electric potential. The visualization of the electric potential was shown in the mesh and contour graph. The results showed that the program is applicable for various sizes of plates, and the electric potential in each position can be calculated and visualized. However, the computer programs has some limitations, such as for perfoming calculations of electric potential. For plate width ( ) of  m, distance of plates ( ) of  m, and initial potential ( )of  Volt, the electric potential in coordinate (20,0.5) is not defined (NaN).
PENENTUAN NILAI SUSEPTIBILITAS DAN UKURAN PARTIKEL MAGNETIK PASIR PATAI KATA PARIAMAN SUMATERA BARAT MENGGUNAKAN METODE BALL MILLING Annisa Alhasna Kurnia; Antonius Surbakti
Komunikasi Fisika Indonesia Vol 18, No 1 (2021)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.18.1.29-34

Abstract

Determination of magnetic properties and magnetic particle size of sand from Kata Pariaman Beach, West Sumatera have been carried out using Pasco Magnetic Probe and scanning electron microscope (SEM) method. Sand samples that have been dried beforehand are then synthesized using two stage ball milling, namely 40 hours first stage, and second stage as a function of 10, 20, 30, and 40 hours with an iron ball with a diameter of 1.5 cm. The results showed that the value of magnetic susceptibility and mass susceptibility increases as milling time increases. The magnetic and mass susceptibility values obtained included iron oxide particles such as Magnetite Fe3O4, hematite and maghemit with a value interval of 20,000 to 110,000. The results of the x-ray fluorescence (XRF) test showed the composition of Fe and Ti increased after ball milling, while other elements such as Si decrease. The results of the study particle size by SEM had a small size with increasing ball milling time from 10, 20, 30, and 40 hours.
Teknologi pengolahan air gambut menjadi air bersih dengan sistem koagulan dan filtrasi di Desa Buluh Cina, Kecamatan Siak Hulu, Kampar Juandi Juandi M; Usman Malik; Salomo Salomo; Antonius Surbakti
Unri Conference Series: Community Engagement Vol 1 (2019): Seminar Nasional Pemberdayaan Masyarakat
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/unricsce.1.325-332

Abstract

The abundant peat water in Buluh Cina Village, Siak Hulu Subdistrict, Kampar is a natural potential that can be used for cooking and bathing purposes by processing peat water into clean water that is suitable for consumption. The purpose of this service activity is to treat peat water into clean water. The method used in this service activity is using coagulant and filtration technology. The optimal filtration and coagulant media used for peat water treatment consists of biosand filters with two media namely pumice and quartz sand. The dedication results reduce turbidity and color of peat water and reduce organic content, so that peat water is processed into clean drinking water. The lowest pH value before filtering is equal to 5.93 and the highest pH is found before filtering which is 6.23. This means that before filtering peat water is weak acidic. The lowest sample results after filtration with a slow sand filter that is equal to 6.42 and the highest pH after filtration of 7.5, which means that water is weakly basic. A good pH limit for water is 6.5 to 8.5 so this service proves that slow sand filters are considered effective enough to optimize water pH. Total dissolved solids (TDS) is one of the parameters for determining water quality, TDS shows the amount of solute solids in water. The result of peat water TDS is that the lowest TDS value before filtration is 46 mg / L and the highest TDS is found before filtering which is 49 mg/L. The lowest sample results after filtration with slow sand filter is 49 mg / L and the highest TDS after filtering is 83 mg/L.
Teknologi mesin pengering pakaian berbasis limbah tempurung kelapa untuk meningkatkan ekonomi bagi UKM yang bergerak dalam bidang laundry di Kecamatan Tampan Kota Pekanbaru Antonius Surbakti; Juandi Muhammad; Erman Taer; Ramondia Setiadi; Usman Malik
Unri Conference Series: Community Engagement Vol 2 (2020): Seminar Nasional Pemberdayaan Masyarakat
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/unricsce.2.550-558

Abstract

The potential of the laundry sector, the entrepreneur community / UKM Laundry in Tampan District, which has very potential business potential. This clearly saves the huge potential of the Laundry / UKM business sector. The clothes drying system, which is carried out through the traditional drying method, has long been practised by Laundry UKM entrepreneurs. In particular, the clothes drying activity has long been a source of livelihood for the Laundry UKM community in Panam District. However, in general, the process of drying clothes through a drying method that relies solely on sunlight is not optimal. The process of drying clothes by laundry entrepreneurs in the Tampan District is still done traditionally, namely drying in the sun. This process takes a long time, it takes 2 to 4 days to dry clothes and it also depends on the presence of sunlight. The drying machine is designed to utilize heat from burning coconut shell waste which functions as a heat collector. So that the drying process can take place quickly, at any time and without depending on the sun. Control of the drying temperature is done by opening and closing the air ducts in the dryer. This dryer consists of a solar collector, biomass burning furnace, and drying room (box). The drying room functions as a place for clothes to be dried. The flow of heat from burning coconut shell waste to the drying chamber. The result of drying clothes is better than traditional drying. The drying technology based on coconut shell waste to dry clothes will be applied in the Laundry UKM community in Tampan District, Pekanbaru which is the livelihood of some UKM in Tampan District, Pekanbaru City
Co-Authors Annisa Alhasna Kurnia Erman Taer Erwin Erwin Eviliony Eviliony Juandi Juandi Rahmondia Nanda Setiadi Salomo Salomo Usman Malik