Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics
type: channel
description: Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Slot MAHJONGJP88 mpo500 login slot gacor hari ini sbobet slot gacor qq288 daftar slot hirekc.org slot gacor gampang maxwin toto slot Situs toto toto togel Togel macau https://www.shermansmiles.com/ Slot bbni4d slot gacor situs luar negeri slot gacor toto90 slot login jepangbet link gacor hari ini SBCTOTO roma77 slot 99 Gadai Bpkb bbtn4d toto situs toto pkv games zen play 168 slot gacor batmantoto slot gacor asian4d login spaceman slot gacor judi bola slot situs slot gacor hari ini 88CASH slot gacor duasatuplus.com slot gacor jpmania rusuntogel slot server korea mahjong slot gacor
language: en
publication name: Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics
issn: 2621-0215
items: PHYSICAL TESTS OF ORGANIC INK BASED ON GUM ARABIC, GAMBIER, AND JANGGELAN LEAVES
items: EFFECTIVENESS OF THE FILTRATION METHOD USING ACTIVATED CARBON FROM KEPOK BANANA PEELS AND ZEOLITE TO REDUCE KMnO4 LEVELS
items: Reservoir Characterization Using Amplitude Versus Offset (AVO) Analysis of Lakota Formation, Teapot Dome Field, Wyoming, USA
items: SEISMIK VULNERABILITY INDEX ANALYSIS IN NAGARI MALALAK TIMUR AS AN EFFORT TO DETERMINE LANDSLIDE POTENTIAL AREAS THE HVSR METHOD
items: Synthesis and Characterization of Activated Carbon From Biomass Waste as A Microwave Absorber Material
items: The IoT-Based Mathematical Pendulum Real Laboratory Tool
items: The Effects of Tempering and Cooling Media on The Strength of Hadfield Steel
items: Analysis of Geothermal Potential Using Gravity Method in Way Ratai Area, Pesawaran Regency, Lampung
items: Development of Perovskite Manganate-Based Materials as Microwave Absorbers (A Literature Study)
items: ANALYSIS OF LANDSLIDE POTENTIAL IN GUNUNG OMEH SUB-DISTRICK LIMA PULUH KOTA REGENCY USING HVSR METHOD
items: Computational Model of Boride Diffusion Layer on the Low Carbon Steel
items: Comparison of Kirchhoff Migration and Reverse Time Migration in the Time Domain: Case Study of Field "Y" North West Java Basin
items: Ammonia (NH3) Gas Control System in Chicken Coops Using Fuzzy Logic Based Internet of Things (IoT) Method
items: 2D Forward Modeling Geothermal System Gravity Data in South Solok Region, West Sumatra
items: ANALYSIS OF MOISTURE CONTENT, CALORIFIC VALUE AND BURNING RATE OF CORNCOB AND KAPOK RANDU (Ceiba pentranda) SKIN BRIQUETTE
items: Simultaneous Seismic Inversion for Reservoir Characterization at Poseidon Field, Browse Basin, Australia
items: Application of the Acoustic Impedance (AI) Seismic Inversion and Multi-Attribute Method for Reservoir Characterization in Bonaparte Basin
items: Ohmic and Diamagnetic Currents Contribution on the Electromagnetic Penetration Depth of a Conducting Surface
items: Water Level Detection System based on Arduino and LabVIEW for Flood Monitors using Virtual Instrumentation
items: Investigation of Thermal Properties of Half-Heusler Alloy FeVZ (Z= As, P, Sb) within Density Functional Theory
items: Analysis of Superhydrophobic-Superoleophilic Properties on Modification of Polyurethane Sponge for Selective Oil-Water Separation
items: The Effect of Nickel Electroplating Time on Alumunium 2024 to ITS Mechanical Property
items: Library Visitor Noise Monitoring System Design With Warning Using LED and Telegram
items: Lithofacies Interpretation Of Sediment Rocks In The Cipamingkis River Outcrop, Jonggol Area, Bogor District, West Java
items: 2D Joint Inversion of Gravity and Magnetic Data to Evaluate a Geological Structure in Tanimbar Island
items: Testing the Bending Strength of Carbon Fiber Composites using the vacuum infusion and vacuum bagging method on the UAV Skywalker 1900 Fuselage Material
items: Prototype of Automatic Tractor Control Navigation System Using ESP 32 Microcontroller
items: Design and Control Underwater Robot Based on Smartphone
items: 3D Visualization of Geothermal System Structure Based on Inversion Model of Gravity Data. Case Study: Mt. Salak Region, West Java
items: Design and Build Underwater Robot Control System Based on PID (Proportional Integral Derivative))

PHYSICAL TESTS OF ORGANIC INK BASED ON GUM ARABIC, GAMBIER, AND JANGGELAN LEAVES
type: item
description: The basic color of ink is black, which contains carbon, making it easier for us to use natural elements around us as the raw material for making organic ink, and it is, of course, more cost-effective. One potential natural material that can be used as a color source to replace synthetic materials in ink production is gum arabic, gambier, and janggelan leaves. This study aims to determine the physical tests of organic ink made from gum arabic, gambier, and janggelan leaves based on the Indonesian National Standard (SNI) No 06-1567-1989. The physical tests conducted include density, viscosity, and color pigment tests. The results of testing the three materials used—gum arabic, gambier, and janggelan leaves—showed that gum arabic is the most optimal for making organic ink. This is evident from the test results, which showed a density of 1.076 g/cm³, a viscosity of 2.56 poise, and a deep black color pigment.
subject: Articles
  topic: section
subject: organic ink
  topic: keywords
subject: gum arabic
  topic: keywords
subject: gambier
  topic: keywords
subject: and janggelan leaves.
  topic: keywords
creator: Masthura Masthura
creator: Ikhwani Pasha
creator: Sri Wulandari
creator: Hilwa Panjaitan
creator: Devi Ramadhani
rights: Copyright (c) 2025 Masthura Masthura, Ikhwani Pasha, Sri Wulandari, Hilwa Panjaitan, Devi Ramadhani
date: 2025-01-24
publication date: 2025-01-24
starting page: 54
ending page: 61
doi: 10.15408/fiziya.v7i1.40521

EFFECTIVENESS OF THE FILTRATION METHOD USING ACTIVATED CARBON FROM KEPOK BANANA PEELS AND ZEOLITE TO REDUCE KMnO4 LEVELS
type: item
description: The effectiveness of the filtration method using activated carbon from Kepok banana peels and natural materials such as zeolite has been studied. This research aims to reduce KMnO4 levels in well water so that it can be used for human needs. The well water samples used in the testing process with the filtration method were taken from a well located in Medan Marelan District, Tanah 600 Sub-district, North Sumatra Province. The utilization of Kepok banana peels for activated carbon to reduce KMnO4 levels involved using the chemical activator HCl 3M for 7 hours and an activation temperature of 600ºC for 45 minutes. The variations in composition used in the filtration method were sample A (75%:25%), sample B (50%:50%), and sample C (25%:75%). The most effective filtration result in reducing KMnO4 levels was sample A, with a KMnO4 reduction of 86.7%, which meets the clean water quality standards according to PERMENKES RI No 32 of 2017.
subject: Articles
  topic: section
subject: Filtration
  topic: keywords
subject: Activated Carbon
  topic: keywords
subject: Kepok Banana Peels
  topic: keywords
subject: Zeolite
  topic: keywords
subject: KMnO₄
  topic: keywords
creator: Ety - Jumiati
creator: Miftahul - Husnah
creator: Auly - Asyari
rights: Copyright (c) 2025 Ety - Jumiati, Miftahul - Husnah, Auly - Asyari
date: 2025-01-24
publication date: 2025-01-24
starting page: 46
ending page: 53
doi: 10.15408/fiziya.v7i1.40520

Reservoir Characterization Using Amplitude Versus Offset (AVO) Analysis of Lakota Formation, Teapot Dome Field, Wyoming, USA
type: item
description: Lakota Formation is one of the prolific formations at Teapot Dome Field. The objective of this study is to analyze hydrocarbon potential of Lakota Formation using Amplitude Versus Offset (AVO) analysis. AVO analysis is performed to determine AVO class, intercept (A) and gradient (B) values of Lakota reservoir. This study uses pre-stack 3D gather data and three wells, 17-WX-21, 48-X-28 and 41-2-X-3. The Lakota formation is known to be an oil-bearing sandstone reservoir which supported by log interpretation. Analysis of AVO modelling using well data by crossplotting reflectivity (R) with sin2 θ, shows that the Lakota Formation is in Class IIP for wells 17-WX-21 and 41-2-X-3 and Class II for well 48-X-28. An estimation of AVO intercept and gradient based on the seismic data show that the Lakota Formation is class II AVO response. A-B plane shows that the pay zones of Lakota formation are fall within hydrocarbon zone, but very close to background trend (wet sands/shale). AVO attributes; A*B and scaled Poisson Ratio at well location showing difficulty in differentiate the presence of oil and brine. Therefore, it can be concluded that AVO attributes can not distinguish between water and oil zone in Lakota Formation, and therefore we can not determine distribution of oil in the Lakota reservoir.
subject: Articles
  topic: section
subject: AVO attributes
  topic: keywords
subject: intercept and gradient
  topic: keywords
subject: Lakota Formation
  topic: keywords
subject: Teapot Dome
  topic: keywords
creator: Nadia Samudera
creator: Ida Herawati
rights: Copyright (c) 2025 Nadia Samudera, Ida Herawati
date: 2025-01-24
publication date: 2025-01-24
starting page: 33
ending page: 45
doi: 10.15408/fiziya.v7i1.38304

SEISMIK VULNERABILITY INDEX ANALYSIS IN NAGARI MALALAK TIMUR AS AN EFFORT TO DETERMINE LANDSLIDE POTENTIAL AREAS THE HVSR METHOD
type: item
description: Nagari Malalak Timur, Malalak Subdistrict, Agam Regency has experienced landslides caused by soil movement so that the soil conditions become unstable. Landslides are also influenced by external factors such as vibrations from earthquakes and vibrations from human activities. For this reason, a study was conducted to describe the distribution of seismic vulnerability index as an effort to determine the potential landslide area. The sampling was limited to 10 measurement points using a set of seismograph sysmatrack MAE sensor type S3S. The basic principle of HVSR method is to obtain the value of Dominant Frequency (f0) and Amplification Factor (A0) by comparing the value of horizontal component and vertical component of microtremor data. From the value of Dominant Frequency (f0) and Amplification Factor (A0), the calculation of Dominant Period (T0) and Seismic Susceptibility Index (Kg) can be done. The results of research in Nagari Malalak Timur show the value of Dominant Frequency (f0) is in the range of 2.676 - 7.22 Hz. The Amplification Factor (A0) value is in the range of 1.4 - 6.563. The Dominant Period (T0) value is in the range of 0.138 - 0.373 s. The Seismic Susceptibility Index (Kg) value is in the range of 0.365 - 14.62 cm/s2. Based on the distribution of Seismic Susceptibility Index (Kg) values in the 10 research points, the highest landslide potential is in point D with a Seismic Susceptibility Index (Kg) value of 14.62 cm/s2. This causes landslides to occur at any time. Keywords: Amplification Factor, Dominant Frequency, HVSR, Seismic Susceptibility Index
subject: Articles
  topic: section
subject: Amplification Factor
  topic: keywords
subject: Dominant Frequency
  topic: keywords
subject: HVSR
  topic: keywords
subject: Seismic Susceptibility Index
  topic: keywords
creator: Yese Angga Marito Silitonga
creator: Syafriani Syafriani
rights: Copyright (c) 2025 Yese Angga Marito Silitonga
date: 2025-01-24
publication date: 2025-01-24
starting page: 1
ending page: 11
doi: 10.15408/fiziya.v7i1.41253

Synthesis and Characterization of Activated Carbon From Biomass Waste as A Microwave Absorber Material
type: item
description: Excessive use of electronic technology can result in harmful radiation and electromagnetic interference, which pose risks to human health. To address this issue, researchers developed a material designed to absorb electromagnetic waves. The study focused on synthesizing and characterizing activated carbon derived from biomass waste, including water hyacinth, melinjo seed shells, and chicken eggshells, with the goal of reducing electromagnetic wave interference. The research process involved several key steps: washing the biomass materials, followed by carbonization, activation using a 65% KOH solution, and subsequent characterization of the material. The tests revealed that the activated carbon possessed a porous structure, which is essential for its absorption capabilities. The surface areas measured were 4.378 m²/g for water hyacinth, 2.518 m²/g for melinjo seed shells, and 2.992 m²/g for chicken eggshells. These surface areas are indicative of the material's potential effectiveness. Additionally, the microwave absorption capacities of the activated carbon were recorded as -18.342 dB for water hyacinth, -13.326 dB for melinjo seed shells, and -12.484 dB for chicken eggshells. These findings suggest that the activated carbons are highly effective as microwave absorber materials, with an absorption efficiency ranging between 94% and 98%. Excessive use of electronic technology can result in harmful radiation and electromagnetic interference, which pose risks to human health. To address this issue, researchers developed a material designed to absorb electromagnetic waves. The study focused on synthesizing and characterizing activated carbon derived from biomass waste, including water hyacinth, melinjo seed shells, and chicken eggshells, with the goal of reducing electromagnetic wave interference. The research process involved several key steps: washing the biomass materials, followed by carbonization, activation using a 65% KOH solution, and subsequent characterizatio…
subject: Articles
  topic: section
subject: Absorbent
  topic: keywords
subject: Water hyacinth
  topic: keywords
subject: Melinjo seed shells
  topic: keywords
subject: Chicken egg shells
  topic: keywords
subject: Microwaves
  topic: keywords
creator: Muhammad Ishaq Nuras
creator: Sitti Ahmiatri Saptari
creator: Arif Tjahjono
creator: Danang Pamungkas Priambodo
creator: Amanda Haiqal
rights: Copyright (c) 2025 Muhammad Ishaq Nuras, Sitti Ahmiatri Saptari, Arif Tjahjono, Danang Pamungkas Priambodo, Amanda Haiqal
date: 2025-01-24
publication date: 2025-01-24
starting page: 12
ending page: 32
doi: 10.15408/fiziya.v7i1.41310

The IoT-Based Mathematical Pendulum Real Laboratory Tool
type: item
description: Blended learning is a learning approach that combines face-to-face instruction and online learning. In this case, blended learning will be applied to the mathematical pendulum topic through practical experimentation. The mathematical pendulum experiment is a method used to enhance students understanding of the subject matter. This study aims to develop an IoT-based design for a practical mathematical pendulum tool. The research method is based on Research and Development (R&D). The study results in the development of a practical mathematical pendulum tool and control system through the Blynk application. The data displayed on the Blynk application includes the period (t) and the number of oscillations (n). The accuracy of the infrared sensor FC-51 is tested by comparing it with a stopwatch, resulting in a period data accuracy ranging from 96% to 99%. The period data is then used to calculate the acceleration due to gravity (g) with an accuracy ranging from 93% to 97%.
subject: Articles
  topic: section
subject: Mathematical Pendulum Experiments
  topic: keywords
subject: Internet of Things
  topic: keywords
subject: Blynk
  topic: keywords
creator: Agus Sudarmanto
creator: Joko Budi Poernomo
creator: Andika Rifqi Maulana
rights: Copyright (c) 2024 Agus Sudarmanto
date: 2024-03-23
publication date: 2024-03-23
starting page: 92
ending page: 103
doi: 10.15408/fiziya.v6i2.37445

The Effects of Tempering and Cooling Media on The Strength of Hadfield Steel
type: item
description: Hadfield steel is a steel known for its good toughness, but it often experiences damage due to excessive loads. In this study, an analysis of the heat treatment process was conducted on Hadfield steel to enhance its strength through homogenization at a temperature of 850°C and tempering at 600°C with a holding time of 30 minutes, followed by a rolling process with a 20% reduction. The data analysis results indicate that the sample cooled using water as the cooling media produced the most optimum strength. This is evident from its tensile strength value, which reached 941 MPa, with a grain size of 3.51 µm. Although its hardness value 351.98 BHN is slightly lower compared to the sample cooled with air, the difference is not significant. The metallographic observations show that there is a phase change in the sample. Initially, the sample only had an austenite phase during the homogenization process. However, after undergoing tempering, there is a phase change to austenite, ferrite, martensite, and carbide phases. This change will result in an increase in the strength of Hadfield steel.
subject: Articles
  topic: section
subject: Hadfield Steel
  topic: keywords
subject: Homogenization
  topic: keywords
subject: Tempering
  topic: keywords
subject: Cooling Media
  topic: keywords
creator: Putri Sukmayanti
creator: Arif Tjahjono
creator: Permana Andi Paristiawan
rights: Copyright (c) 2024 Arif Tjahjono
date: 2024-03-23
publication date: 2024-03-23
starting page: 44
ending page: 52
doi: 10.15408/fiziya.v6i2.36379

Analysis of Geothermal Potential Using Gravity Method in Way Ratai Area, Pesawaran Regency, Lampung
type: item
description: Way Ratai, Pesawaran is one of the areas in Lampung that has a surface manifestation, in the form of geothermal potential. Based on data from the Directorate of Geothermal in 2017, Way Ratai has a potential of more than 330 MW with the manifestation of hot springs and hot steam. This study aimed to determine the distribution of subsurface density of Mount Way Ratai, Pesawaran, Lampung region by using ggmplus satellite gravity data. Based on fault analysis method and 2D forward modeling in Oasis Montaj software. The results showed that the geothermal area of Way Ratai identified 2 types of faults, namely reverse faults and normal fault. Based on the results of forward modeling, subsurface density of Way Ratai area, Lampung offering can be identified at a density of 1.2 gr/cc suspected alteration rocks in the form of clay minerals, density of 1.55 gr/cc suspected sand gravel, density of 1.6 gr/cc suspected Tuff rocks, density of 2.3 gr/cc suspected breccia rocks and conglomerates, density 2.6 gr/cc suspected schist and chert, and density 2.99 gr/cc suspected basalt rocks.
subject: Articles
  topic: section
subject: Gravity Data
  topic: keywords
subject: GGMplus
  topic: keywords
subject: Oasis Montaj
  topic: keywords
subject: Geothermal
  topic: keywords
subject: Way Ratai
  topic: keywords
creator: Putri Adelia
creator: Suwondo -
creator: Agustya Adi Martha
creator: Tiara Grace Franzisca
rights: Copyright (c) 2024 Putri Adelia, Suwondo - -, Agustya Adi Martha, Tiara Grace Franzisca
date: 2024-03-23
publication date: 2024-03-23
starting page: 30
ending page: 41
doi: 10.15408/fiziya.v6i2.34659

Development of Perovskite Manganate-Based Materials as Microwave Absorbers (A Literature Study)
type: item
description: The 5.0 industrial revolution has led to the rapid development of digital devices and radar detection technology. Electromagnetic (EM) radiation generated by digital devices, such as smartphones, computers, and airplanes, is proven to cause great harm to human health. Manganese perovskite is one material that can produce changes such as its crystal structure, electron transfer, electrical properties, and magnetic properties. Doping applied to manganese perovskite-based materials can induce phenomena such as Colossal Magnetoresistance (CMR) and Magnetocaloric Effect (MCE), giving manganese perovskite-based materials great potential to be used as microwave absorbers. Through this article, the development of various manganese perovskite-based materials as microwave absorbers will be reviewed and summarized. Synthesis methods and microwave absorption mechanisms will also be reviewed. This article focuses on the doping of A-site and B-site manganese perovskite-based materials and their performance in absorbing microwaves. Hopefully, this article can be one of the guidelines for designing new manganese perovskite-based materials, to be applied as microwave absorbers.
subject: Articles
  topic: section
subject: Perovskite manganate
  topic: keywords
subject: microwave absorbers
  topic: keywords
subject: mechanism
  topic: keywords
subject: synthesis
  topic: keywords
subject: doping
  topic: keywords
creator: Amanda Haiqal
creator: Danang Pamungkas Priambodo
creator: Fattah Ardhi Faddakiri
rights: Copyright (c) 2024 Amanda Haiqal, Danang Pamungkas Priambodo, Fattah Ardhi Faddakiri
date: 2024-03-23
publication date: 2024-03-23
starting page: 63
ending page: 79
doi: 10.15408/fiziya.v6i2.36991

ANALYSIS OF LANDSLIDE POTENTIAL IN GUNUNG OMEH SUB-DISTRICK LIMA PULUH KOTA REGENCY USING HVSR METHOD
type: item
description: On BPBD Lima Puluh Kota designated Gunung Omeh Sub-district as a disaster-prone area due to the detected potential of moving soil. This mobile soil causes gaps in the soil with the potential to continue to move at any time and is exacerbated by unstable soil conditions that cause the risk of landslides. Therefore, there is a need for research in Gunung Omeh sub-district on landslide potential. This research aims to analyse the landslide potential in Gunung Omeh sub-district. Data collection is limited to 9 measurement points using a set of Sysmatrack MAE seismograph sensor type S3S. The data generated is in the form of seismic wave signals which are then processed with the HVSR method using Geopsy software to produce H/V curves with parameters A0 and f0. From these two parameters, the values of soil susceptibility index (Kg) and ground shear strain (γg) are obtained. The results showed that the susceptibility index ranged from 0.26 x 10-6 s2/cm to 16.34 x 10-6 s2/cm and ground shear strain ranged from 1.32 x 10-4 to 2.15 x 10-6. Thus, the highest landslide potential is found at point 6 with the highest susceptibility index of 16.34994479 and ground shear strain of 1.32x10¬4.
subject: Articles
  topic: section
subject: Landslide
  topic: keywords
subject: HVSR
  topic: keywords
subject: Seismic Susceptibility
  topic: keywords
subject: Ground Shear Strain
  topic: keywords
creator: Agma Nabilla
creator: Syafriani Syafriani
rights: Copyright (c) 2024 Agma Nabilla
date: 2024-03-23
publication date: 2024-03-23
starting page: 53
ending page: 62
doi: 10.15408/fiziya.v6i2.35996

Computational Model of Boride Diffusion Layer on the Low Carbon Steel
type: item
description: In this paper, a computation model was used to analysis the growth kinetic of two boride layers FeB and Fe2B on the surface of low carbon steel. St41 one of the low carbon steel was used as the basic sample and given the treatment by adding the powder pack boriding in the temperature of 700, 800, and 9000C for the 8 hours of treatment time. To perform the morphology and dimension of the boride layers used the optical microscope. The computation model based on the diffusion equation from the Fick’s Law and solved under the certain assumptions with the parabolic growth of iron boride. For this study, a numerical method was created to determine the iron borides layer thickness as a function of process parameters (temperature and time).By using the parabolic growth constant it can be determined the diffusion coefficient for the phase of FeB, Fe2B, and diffusion zone. Based on the diffusion coefficient it can be predicted the depth and thickness of borided layer on the surface of St41 low carbon steel
subject: Articles
  topic: section
subject: powder pack boriding
  topic: keywords
subject: Fick’s Law
  topic: keywords
subject: parabolic growth constant
  topic: keywords
subject: diffusion coefficient
  topic: keywords
subject: FeB/Fe2B layer
  topic: keywords
creator: Sutrisno Sutrisno
rights: Copyright (c) 2024 Sutrisno Sutrisno
date: 2024-03-23
publication date: 2024-03-23
starting page: 80
ending page: 91
doi: 10.15408/fiziya.v6i2.36554

Comparison of Kirchhoff Migration and Reverse Time Migration in the Time Domain: Case Study of Field "Y" North West Java Basin
type: item
description: This study evaluates and compares two seismic migration methods, namely Kirchhoff Migration and Reverse Time Migration (RTM), using 2D seismic data in the North West Java Basin. The main objective of the research is to investigate the relative performance of the two methods in restoring the position of reflectors that have undergone distortion due to the propagation phenomenon of seismic waves. The study involves a detailed analysis and comparison of these methods in terms of accuracy and computational time efficiency. The results show that the Kirchhoff Migration method achieves high accuracy in handling reflectors with significant dip angles. Additionally, this method also demonstrates good computational time efficiency. On the other hand, Reverse Time Migration, although recognized as a sophisticated approach, shows less satisfactory results under the conditions of this study, highlighting its dependence on data complexity and velocity model optimality. This research provides important insights for the appropriate selection of migration methods based on geological characteristics and existing seismic data. Kirchhoff Migration emerges as a superior choice, especially for regions with geological complexity and high dip angles. In conclusion, the selection of migration methods should carefully consider the specific characteristics of the relevant region to achieve optimal results.
subject: Articles
  topic: section
subject: North West Java Basin
  topic: keywords
subject: Kirchhoff
  topic: keywords
subject: Reverse Time
  topic: keywords
subject: seismic
  topic: keywords
creator: Omar Moefti
creator: Abdul Haris
rights: Copyright (c) 2024 Omar Moefti, Abdul Haris
date: 2024-03-23
publication date: 2024-03-23
starting page: 14
ending page: 29
doi: 10.15408/fiziya.v6i2.36356

Ammonia (NH3) Gas Control System in Chicken Coops Using Fuzzy Logic Based Internet of Things (IoT) Method
type: item
description: Chicken productivity increases every year, resulting in air pollution in the form of NH3 generated by chicken waste, which is felt by the residents living around the chicken coop. The purpose of this research is to design an ammonia gas control system using Matlab, with the ammonia gas sensor MQ-135 and the humidity sensor DHT11 as parameters, to minimize the ammonia gas levels. This system operates by transmitting information about the condition of ammonia gas levels using a fuzzy logic control system as the technical decision-making mechanism for driving the exhaust fan based on data from the DHT11 and MQ-135 sensors. In this research, the fuzzy logic method was employed to determine the membership functions for the DHT11 sensor (dry, moist, wet) and MQ-135 sensor (normal, moderate, high), resulting in decisions of safe, moderate, and dangerous levels. The data is monitored on a platform through the Blynk app and Thingspeak, thus connecting the Internet of Things (IoT) to the internet network using the NodeMCU ESP8266 as the microcontroller. This research yields an ammonia gas control system that effectively manages air quality affected by chicken waste, with sensor accuracy levels exceeding 97%.
subject: Articles
  topic: section
subject: Control System
  topic: keywords
subject: Fuzzy Logic
  topic: keywords
subject: Internet of Things (IoT)
  topic: keywords
subject: Thingspeak
  topic: keywords
subject: Blynk.FST
  topic: keywords
creator: Khasbianta Supriadi
creator: Ambran Hartono Hartono
creator: Salsabila Tahta Hirani Putri
creator: Hanif Fakhrurraja
rights: Copyright (c) 2024 Ambran Hartono Hartono
date: 2024-03-23
publication date: 2024-03-23
starting page: 1
ending page: 13
doi: 10.15408/fiziya.v6i2.34757

2D Forward Modeling Geothermal System Gravity Data in South Solok Region, West Sumatra
type: item
description: Indonesia has the greatest potential for geothermal energy in the world. Geothermal has an important role as an alternative fuel because it is a renewable energy source, but its use has not been maximized. One of the areas that have the greatest potential for geothermal energy in South Solok, West Sumatra. Therefore, this study was conducted to determine the geothermal system in the South Solok area, West Sumatra by using the gravity method. The gravity data processing stage requires some software to get the CBA value(Complete Bouguer Anomaly), map contours of the CBA. Anomaly separation with the butterworth filter method, determination of residual anomaly slice points, and 2D modeling of geothermal systems. Based on modeling, the qualitative interpretation interprets the Complete Bouguer Anomaly map which is suspected as a geothermal prospect area is a low anomaly ranging from 7.9 mgal - 9.4 mgal which is marked in dark blue. Meanwhile, quantitative interpretation produces modeling of the AB and CD slicing with a total of four layers. This layer consists of clay rock as a cap rock, sandstone as a reservoir, granite as a heated rock as a heat source, and the last layer in the form of magma as a heat source. The anomaly modeling of these two sections is dominated by granite rock with a density value of 2500 kg/m3 for the AB section and 2550 kg/m3 for the CD section.
subject: Articles
  topic: section
subject: Forward modeling
  topic: keywords
subject: geothermal systems
  topic: keywords
subject: gravity methods
  topic: keywords
creator: Muhammad Nafian
creator: Belista Gunawan
creator: Nanda Ridki Permana
rights: Copyright (c) 2021 Muhammad Nafian, Nanda Ridki Permana
date: 2023-09-30
publication date: 2023-09-30
starting page: 36
ending page: 44
doi: 10.15408/fiziya.v4i1.20235

ANALYSIS OF MOISTURE CONTENT, CALORIFIC VALUE AND BURNING RATE OF CORNCOB AND KAPOK RANDU (Ceiba pentranda) SKIN BRIQUETTE
type: item
description: Bio charcoal Briquette is a product made from biomass with a carbonization process and compressed with a certain shape. This study aims to examine the calorific value and burning rate of corncob and kapok randu (Ceiba Pentranda) randu (Ceiba pentranda) skin briquettes with variations in the composition of ingredients. The briquette were produced in 5 stages: First, the main material for cobs and kapok randu (Ceiba Pentranda) randu skin is dried in the sun for 3 days so that the weight of the ingredients is reduced by 20%. Second, the carbonization of the main material with a temperature of 400˚C for 60 minutes with a furnace and then materials that has been crushed is sieved with a sieve 50 mesh. Third, compressed briquettes with corncob composition and kapok randu (Ceiba Pentranda) skin in the following ratios of A (100%: 0%), B (75%: 25%), C (50%: 50%), D (25%: 75 %), E (0%: 100%) with 10% w/w tapioca starch as binder. Fourth, the dry the briquette under the sun for 3 days (20 hours) and roasted with a temperature of 100˚C for 60 minutes. Fifth, after dried, the samples were then characterized their moisture content, calorific value, and burning rate. The results show that the highest moisture content value in sample E is 3.3303% and the lowest moisture content in sample B (2.4587%). The highest calorific values are sample E which is 6195.05 Cal / grams. While the lowest calorific value was found in sample D (25% corn cobs and 75% kapok randu (Ceiba Pentranda) skin), which was 3803.96 Cal / grams. The lowest burning rate was found in sample E (100% kapok randu (Ceiba Pentranda) skin) with a value was 0.0448 grams / minute. While the highest burning rate was found in sample D (25% corn cobs and 75% kapok randu (Ceiba Pentranda) skin) with the value was 0.0622 grams/minute.
subject: Articles
  topic: section
subject: Briquettes
  topic: keywords
subject: corncob
  topic: keywords
subject: Kapok randu (Ceiba Pentranda) randu (Ceiba pentranda) skin
  topic: keywords
subject: calorific value
  topic: keywords
subject: burning rate
  topic: keywords
creator: Anshori Huroeroh
creator: Sheilla Rully Anggita
creator: Hamdan Hadi Kusuma
rights: Copyright (c) 2021 sheilla rully anggita
date: 2023-09-30
publication date: 2023-09-30
starting page: 21
ending page: 28
doi: 10.15408/fiziya.v4i1.19745

Simultaneous Seismic Inversion for Reservoir Characterization at Poseidon Field, Browse Basin, Australia
type: item
description: Seismic inversion method has been widely used to obtain reservoir property in an oil and gas field. In this research, one of inversion methods known as simultaneous inversion is used to analyze reservoir characterization at Poseidon Field, Browse Basin. Simultaneous inversion is applied to partial angle stack data and result in volume of Acoustic Impedance (AI), Shear Impedance (SI) and Lame parameter (LMR). The objective of this study is to determine distribution of sandstone lithology with gas saturated in Plover reservoir formation. Sensitivity analysis is done by cross-plotting elastic and Lame parameter from five well log data and analyzing lithology type and fluid saturation. Based on those cross-plots, lithological type can be identified from AI, λρ, µρ and λ/µ parameters. Meanwhile, the presence of gas can be discriminated using SI, λρ, and λ/µ parameters. Gas-saturated sandstone presence is characterized by Lambda-Rho value less than 50 GPa g cc-1 and Lambda over Mu value less than 0.8 GPa g cc-1. Maps of each parameter are generated at reservoir interval. Based on those maps, it can be concluded that gas sand spread out in the eastern and western areas of research area.
subject: Articles
  topic: section
subject: Lambda Mu Rho
  topic: keywords
subject: Simultaneous Inversion
  topic: keywords
subject: Poseidon field
  topic: keywords
creator: Suleman Mauritz Sihotang
creator: Ida Herawati
rights: Copyright (c) 2021 Suleman Mauritz Sihotang
date: 2023-09-30
publication date: 2023-09-30
starting page: 63 73
ending page: 63 73
doi: 10.15408/fiziya.v4i1.19782

Application of the Acoustic Impedance (AI) Seismic Inversion and Multi-Attribute Method for Reservoir Characterization in Bonaparte Basin
type: item
description: Research on the application of the acoustic impedance (AI) seismic inversion and multi-attribute method was conducted with the aim to characterize the reservoir in the Bonaparte Basin. The modeling which used in the acoustic impedance inversion seismic method is model-based. Meanwhile, the multi-attribute seismic method used log porosity that appliying the linear regression method and using the stepwise regression technique. Based on the result of the sensitivity analysis and analysis using the seismic inversion acoustic impedance method, the sandstone reservoir zone that has the prospect of hydrocarbons containing gas is located in the Northeast-Southwest part of the study area which in WCB-1, WCB-3 and WCB-4 well with the acoustic impedance values are in the range of 4,800 - 13,000 (m / s) * (g / cc), and the porosity values generated from the analysis using the multi-attribute seismic method are in the range of 5 - 16% in WCB-1 and WCB-4, 2 - 10% on WCB-3.
subject: Articles
  topic: section
subject: acoustic impedance
  topic: keywords
subject: multi-attribute
  topic: keywords
subject: model-based
  topic: keywords
subject: step-wise regression.
  topic: keywords
creator: Maurin Puspitasari
creator: Ambran Hartono
creator: Egie Wijaksono
creator: Tati Zera
rights: Copyright (c) 2021 Maurin Puspitasari
date: 2023-09-30
publication date: 2023-09-30
starting page: 8
ending page: 20
doi: 10.15408/fiziya.v4i1.19788

Ohmic and Diamagnetic Currents Contribution on the Electromagnetic Penetration Depth of a Conducting Surface
type: item
description: Due to its conducting electron, metal is a good reflector for electromagnetic wave. An electromagnetic wave penetrating a metallic surface has a finite penetrating depth. There are two limit that are well studied in the physics textbooks. They are high frequency electromagnetic wave penetrating a metal with small conductivity and a static (low frequency) field penetrating a superconductor (metal with infinitely large conductivity). In this article we study the intermediate regime between these two limits. By setting the electric current density as the total sum of both Ohmic and Diamagnetic currents, we derive the penetration depth in the intermediate regime., we show the transition between these two limits.
subject: Articles
  topic: section
subject: Electromagnetic penetration
  topic: keywords
subject: skin depth
  topic: keywords
subject: diamagnetic current
  topic: keywords
subject: Maxwell equations
  topic: keywords
subject: London equation
  topic: keywords
creator: Adam Badra Cahaya
rights: Copyright (c) 2021 Adam Badra Cahaya
date: 2023-09-30
publication date: 2023-09-30
starting page: 1
ending page: 7
doi: 10.15408/fiziya.v4i1.19790

Water Level Detection System based on Arduino and LabVIEW for Flood Monitors using Virtual Instrumentation
type: item
description: This virtual instrumentation system based on Arduino and LabVIEW aims to detect the water level using a water level sensor. The water level sensor used to measure the water level is the Funduino type. This sensor and the buzzer module are connected to the Arduino Uno to transmit data to LabVIEW. When the water has reached a certain height, this sensor will detect the water level. When the water has reached the set point, this sensor will sound a buzzer as a sign that the water is full. Based on the experimental results, it is found that the tension value affects the volume of the experiment site. Where the greater the volume used will produce a large voltage, and vice versa. Furthermore, the graph results obtained that are still away from the linearity of a regression function with a value of y = 0.0079x + 1.8561 and R² = 0.4298.
subject: Articles
  topic: section
subject: Arduino
  topic: keywords
subject: Water Level Sensor
  topic: keywords
subject: LabVIEW
  topic: keywords
creator: Sabar Sabar
creator: Dewi Maulidah Nur Anjani
creator: Sastra Kusuma Wijaya
rights: Copyright (c) 2021 Sabar Sabar
date: 2023-09-30
publication date: 2023-09-30
starting page: 29
ending page: 35
doi: 10.15408/fiziya.v4i1.19808

Investigation of Thermal Properties of Half-Heusler Alloy FeVZ (Z= As, P, Sb) within Density Functional Theory
type: item
description: The figure of merit (ZT) holds an important role in thermoelectric material that indicates the efficiency of thermoelectric (TE) devices. The higher ZT value, the higher efficiency would be obtained of TE devices. One of the sub-class materials that has high potential application for thermoelectric material is half-Heusler (HH) alloy. In order to investigate the ZT value of HH conduct simulation using to investigate the ZT value of HH alloy FeVZ (Z= As, P, Sb) by using density-functional theory (DFT). Our research results show that FeVAs has higher ZT values than FeVP and FeVSb in the range temperature of 150-900 K. All of those compounds still have good ZT value around ~0.7 even in the temperature regime of 900 K, and shows a good trend for p-type thermoelectric materials.
subject: Articles
  topic: section
subject: Half-Heusler
  topic: keywords
subject: Figure of merit
  topic: keywords
subject: Thermoelectric
  topic: keywords
creator: Anugrah Azhar
rights: Copyright (c) 2021 Anugrah Azhar
date: 2023-09-30
publication date: 2023-09-30
starting page: 45
ending page: 51
doi: 10.15408/fiziya.v4i1.19615

Analysis of Superhydrophobic-Superoleophilic Properties on Modification of Polyurethane Sponge for Selective Oil-Water Separation
type: item
description: In this research, a modification of polyurethane (PU) sponge material has been made to obtain superhydrophobic-superoleophilic properties. The PU sponge was coated with several nanomaterials such as ZnO, Fe3O4+TEOS, and stearic acid by dip-coating and drop-coating methods. The tests include selective separation of oil and water with a magnetic response. Several types of oil and organic solvents were tested for absorption capacity. The results showed that the PU@ZnO@Fe3O4@SA sponge has a good absorption capacity, from 4.37 mL to 7.37 mL. The fabricated PU sponge could selectively separate oil from water with a separation efficiency above 99%. The fabricated PU sponge also could be magnetically driven by external magnetic fields. From the characterization using 3D OM, the water contact angle was 153.38°, which indicates that the PU@ZnO@Fe3O4@SA sponge is superhydrophobic. And from surface morphology obtained an average pore size diameter of 167.475 μm.
subject: Articles
  topic: section
subject: superhydrophobic-superoleophilic
  topic: keywords
subject: PU sponge
  topic: keywords
subject: ZnO
  topic: keywords
subject: Fe3O4 TEOS
  topic: keywords
subject: stearic acid
  topic: keywords
subject: Fe3O4 TEOS
  topic: subjects
creator: Niken Aprilia Eka Putri
creator: Arif Tjahjono
creator: Perdamean Sebayang
rights: Copyright (c) 2021 Niken Aprilia Eka Putri
date: 2023-09-30
publication date: 2023-09-30
starting page: 52
ending page: 62
doi: 10.15408/fiziya.v4i1.19697

The Effect of Nickel Electroplating Time on Alumunium 2024 to ITS Mechanical Property
type: item
description: The purpose of this nickel electroplating research on aluminum is to determine the effect of time on mechanical properties in the form of hardness values from specimens and then the SEM-EDX Test is carried out on specimens with the highest hardness test values to find out the microstructure and composition in the coating. The materials used in this study are nickel as the coating and aluminum 2024 as the coated material. The fixed variables used in this study include voltage (25 V), electrode distance (20 cm), water (2400 ml), salt (40gr), vinegar (1600 ml), aluminum 2024, and nickel. The free variables are variation in coating time, namely 10, 15, and 20 minutes. The results of this study showed that the highest hardness value was found in specimens with 10 minutes of immersion time with a value of 198.31 HV and the lowest in specimens with 20 minutes of immersion time with a value of 132.81 HV. After the SEM-EDX test, it was found that the micro layer structure contained pitting (defects) and the element with the highest presentation in the layer was Ni with a mass of 84.07% and an atomic number of 55.29%.
subject: Articles
  topic: section
subject: Keywords
  topic: keywords
subject: aluminum 2024
  topic: keywords
subject: nickel
  topic: keywords
subject: electroplating
  topic: keywords
subject: hardness test and SEM-EDX test
  topic: keywords
creator: Hidayah Fajria
creator: Ferry Setiawan
creator: Dhimas Wicaksono
rights: Copyright (c) 2023 HIDAYAH FAJRIA
date: 2023-09-30
publication date: 2023-09-30
starting page: 1
ending page: 8
doi: 10.15408/fiziya.v6iI.30508

Library Visitor Noise Monitoring System Design With Warning Using LED and Telegram
type: item
description: Abstract. The library supports education and is used as a place to learn and gain knowledge. To maximize its use, visitors need comfort by not making noise or upheaval that can disturb other visitors. According to the decision of the Ministry of Environment in 1996, the maximum standard for noise levels in libraries is 55 dB. This research was conducted to design a tool that can monitor the noise that occurs in the library by providing information on room conditions usingLED (Light Emitting Diode) lights, LCD (Liystal Displayquid Cr), and giving notifications to librarians in the form of messages on the Telegram application if the noise exceeds the limit. maximum. The tool is designed using ESP32 as a control, a GY-MAX4466 sensor to detect sound, and the output system uses red, yellow, and greenLED (Light Emitting Diode), LCD (Liquid Crystal Display) 16x2, and the Telegram application. The results of this study concluded that the noise monitoring system was running well, with a GY-MAX4466 sensor error rate of 0.4%, and the best R Square value was obtained at a distance of 1 meter from the sound source with an R Square value of 0,7202.
subject: Articles
  topic: section
subject: ESP32
  topic: keywords
subject: GY-MAX4466
  topic: keywords
subject: LCD
  topic: keywords
subject: LED
  topic: keywords
subject: Library
  topic: keywords
subject: Noise
  topic: keywords
subject: Telegram.
  topic: keywords
creator: Nur Fitriani
creator: Sitti Ahmiatri Saptari
creator: Elvan Yuniarti
rights: Copyright (c) 2023 Elvan Yuniarti
date: 2023-09-30
publication date: 2023-09-30
starting page: 50
ending page: 59
doi: 10.15408/fiziya.v6iI.34280

Lithofacies Interpretation Of Sediment Rocks In The Cipamingkis River Outcrop, Jonggol Area, Bogor District, West Java
type: item
description: This research aims to study sedimentary structures and determine the depositional environment of the outcrop in the Cipamingkis River, Jonggol area, Bogor Regency, West Java. The method in this study includes literature studies, field surveys, data interpretation, and facies analysis. The result shows the outcrop in the Cimangkis River can be divided into four (4) sedimentation sequences unit: Claystone Unit (Sequence 1), Limestone/Calsirudit Unit (Sequence 2), Limestone/calcarenite-Calcilutite Unit (Sequence 3), Mudstone/ Calsilutite Unit (Sequence 4). Based on the depositional environment analysis, this outcrop displays characteristics of a shallow marine environment. The Interpretation of facies from outcrops can be used as a reservoir analog and can support subsurface interpretation in the Northwest Java Basin
subject: Articles
  topic: section
subject: fasies
  topic: keywords
subject: cibulakan
  topic: keywords
subject: cipamingkis river
  topic: keywords
subject: carbonate.
  topic: keywords
creator: Suwondo Suwondo
creator: Mill Sartika Indah
creator: Afzalurrahman Assalam
creator: Muhammad Nafian
creator: Andika Perbawa
rights: Copyright (c) 2023 Suwondo Suwondo
date: 2023-09-30
publication date: 2023-09-30
starting page: 60
ending page: 70
doi: 10.15408/fiziya.v6iI.34282

2D Joint Inversion of Gravity and Magnetic Data to Evaluate a Geological Structure in Tanimbar Island
type: item
description: The need for hydrocarbon energy, especially oil and gas, requires continuous exploration of hydrocarbon reserves, especially in eastern Indonesia. Tanimbar Islands, Maluku was chosen to be the research area because of its complex subsurface geology and is located on the fold thrust belt resulting from tectonic evolution. In this research, an innovation is carried out using joint inversion modeling by correlating physical parameters from two different geophysical data, which are gravity and geomagnetic. The purpose of this research is to determine the subsurface mapping of the research area, determine the density and susceptibility values of rocks, and determine the structural patterns that exist in the subsurface. The results of subsurface mapping of the Tanimbar Islands based on the results of Joint Inversion modelling have found a geological structure pattern in the form of a fold thrust belt due to the Banda Arc subduction zone. In section A-A', there is a sequence of fold thrust belt with 10 structural patterns, including 6 structures in the northwest-southeast direction and 4 structures in the northeast-southwest direction. In section B-B' there are 9 structural patterns in the northeast-southwest direction. High anomalies obtained density values ranging from 2.77 - 2.81 gr/cm3 and susceptibility ranging from 0.00125 - 0.0013 SI are thought to be caused by high basement in the form of volcanic rocks, while low anomalies obtained density values ranging from 2.45 - 2.49 gr/cm3 and susceptibility ranging from 0.0008 - 0.00085 SI are thought to be caused by thick sedimentary layers of the Batimafudi Formation.
subject: Articles
  topic: section
subject: fold thrust belt
  topic: keywords
subject: Geomagnetic
  topic: keywords
subject: Gravity
  topic: keywords
subject: Joint Inversion
  topic: keywords
subject: Tanimbar
  topic: keywords
creator: Arkanu Andaru
creator: Praditiyo Riyadi
creator: Muhammad Nafian
rights: Copyright (c) 2023 Praditiyo Riyadi
date: 2023-09-30
publication date: 2023-09-30
starting page: 71
ending page: 78
doi: 10.15408/fiziya.v6iI.34293

Testing the Bending Strength of Carbon Fiber Composites using the vacuum infusion and vacuum bagging method on the UAV Skywalker 1900 Fuselage Material
type: item
description: The purpose of this study was to determine the bending strength of carbon fiber composite materials with lycal epoxy resin on the Skywalker 1900 UAV. Composites will be made for test specimens with carbon fiber combined with lycal resin using vacuum infusion printing and vacuum bagging methods. From these two methods a sample of specimens will be made for testing using a bending test using the three point bending method to determine the bending strength value of the fuselage material. As for another test, namely microphotos, the process of observing this microstructure can find out how the shape, size, and distribution of second phase particles have an important role in knowing the properties of the material itself. The results of the test specimens were compared between vacuum infusion printing and vacuum bagging and then the best value was sought between the two methods. The results were obtained after testing where the two methods of printing and micro-photos obtained the best results in vacuum bagging. In the vacuum bagging process, the highest value was found in specimen b2 with a bending stress value of 1201.90Mpa and the lowest yield was found in specimen i1 with a bending stress value of 1017.74Mpa. Then the micro photo test can be seen in the vacuum bagging printing process, the penetration of the resin in bagging to the fiber is better.
subject: Articles
  topic: section
subject: UAV
  topic: keywords
subject: Composite
  topic: keywords
subject: Carbon fiber
  topic: keywords
subject: Vacuum infusion
  topic: keywords
subject: Vacuum bagging
  topic: keywords
subject: Bending test.
  topic: keywords
creator: Chandra Febriyanto
creator: Ferry Setiawan
creator: Ikbal Rizki Putra
rights: Copyright (c) 2023 Chandra Febriyanto
date: 2023-09-30
publication date: 2023-09-30
starting page: 9
ending page: 19
doi: 10.15408/fiziya.v6iI.30562

Prototype of Automatic Tractor Control Navigation System Using ESP 32 Microcontroller
type: item
description: A prototype of an automatic tractor control navigation system using a microcontroller has been designed. This study aims to design a prototype of a tractor control navigation system automatically. The design begins with initializing ESP 32, followed by reading GPS (Ublox Neo M8N) and compass (QMC5883L). After that, waiting for commands from the wifi network, followed by reading waypoints, moving the motor, then the motor will drive the tractor prototype. The tests carried out included GPS and compass testing, control response testing, and waypoint navigation testing. The test results show that the accuracy of the coordinates of the GPS UBlox Neo M8N is 0.04 m from the Android smartphone GPS, the QMC5883L compass test shows the difference between the analog compass and the android smartphone compass by 0.4 degrees and 1.0 degrees. Testing the navigation system using the waypoint method, it was found that it was able to map an area or location with a distance of less than 5 meters in following the waypoint route and provide accurate coordinate information to the server during the trip as a source of map information.
subject: Articles
  topic: section
subject: ESP 32
  topic: keywords
subject: Microcontroller
  topic: keywords
subject: Tractor
  topic: keywords
subject: Waypoint
  topic: keywords
subject: Wifi
  topic: keywords
creator: Abu Ammar
creator: Muhammad Yusril
creator: Prasepvianto Estu Broto
rights: Copyright (c) 2023 Abu Ammar, Muhammad Yusril
date: 2023-09-30
publication date: 2023-09-30
starting page: 20
ending page: 29
doi: 10.15408/fiziya.v6iI.31593

Design and Control Underwater Robot Based on Smartphone
type: item
description: Underwater robot is a type of robot specially designed and configured to operate underwater, especially in seas, rivers, and lakes. The main purpose of underwater robots is to perform various tasks and missions underwater, which are often difficult or dangerous for humans to carry out. The method used to design the underwater robot is with a smartphone control system. The robot can move according to the user's commands by being connected through a internet network, allowing the robot and smartphone to be interconnected. This underwater robot is equipped with a camera and two lamps, and the images captured by the camera are displayed on a personal computer. Meanwhile, the lights are controlled by the user using a smartphone. The research results show that the underwater robot can be controlled to a depth of 0.5 meters with an average button press speed of 1 second in floating conditions and 2.9 seconds at a depth of 15 centimeters. The application of this robot can take photos, display good images, and monitor activities underwater. In addition, the captured image from underwater robot are also good and the image produced are clearly visible both on land and in the water.
subject: Articles
  topic: section
subject: Blynk
  topic: keywords
subject: Smartphone
  topic: keywords
subject: Underwater Robot
  topic: keywords
subject: WiFi.
  topic: keywords
creator: Lamin Rene Loua
creator: Dewi Lestari
creator: Elvan Yuniarti
creator: Rista ‎‎‎‎‎‎‎‎‎‎‎‎‎‎‎‎‎‎‎‎
rights: Copyright (c) 2023 Dewi Lestari
date: 2023-09-30
publication date: 2023-09-30
starting page: 30
ending page: 39
doi: 10.15408/fiziya.v6iI.32368

3D Visualization of Geothermal System Structure Based on Inversion Model of Gravity Data. Case Study: Mt. Salak Region, West Java
type: item
description: The geothermal power plant located in Gunung Salak plays a crucial role in increasing the electricity supply transmitted to the Java-Bali region, as the energy demand continues to rise. The objective of this research is to determine the 3D subsurface structure of Gunung Salak, specifically the distribution of the reservoir as the target for geothermal energy using the Gravity method. Gravity data, including gravity disturbance (gd), geoid, and Digital Elevation Model (DEM), were obtained from the ICGEM website with a total of 48740 data each. Based on the results of the residual anomaly map, the low anomalies beneath Gunung Salak have values from -5.15 to -1.88 mGal, which are suspected to be associated with the magma chamber. The high anomalies beneath the manifestations have values from 0.92 to 5.01 mGal, indicating andesitic basalt intrusive rocks believed to be the reservoir rock. Through the 3D inversion modeling of the subsurface structure of the Gunung Salak geothermal system, a clay cap with a density from 2.47 to 2.5 g/cc at depths of 0 to 700 m and andesitic basalt rock as the reservoir with a density from 2.74 to 2.91 g/cc at depths of 700 to 3000 m have been identified.
subject: Articles
  topic: section
subject: Geothermal
  topic: keywords
subject: Gravity
  topic: keywords
subject: Inversion
  topic: keywords
subject: Mt. Salak
  topic: keywords
subject: Reservoir
  topic: keywords
creator: Nanda Ridki Permana
creator: Belista Gunawan
rights: Copyright (c) 2023 Nanda Ridki Permana, Belista Gunawan
date: 2023-09-30
publication date: 2023-09-30
starting page: 40
ending page: 49
doi: 10.15408/fiziya.v6iI.33439

Design and Build Underwater Robot Control System Based on PID (Proportional Integral Derivative))
type: item
description: Indonesia has wide waters and in it there is very abundant fishery potential such as various species of freshwater and other aquatic biota. The large role of Indonesian waters certainly needs to be supported by a monitoring system that is able to control and monitor conditions underwater, like underwater robot. In this research, the design of an underwater robot based on PID (Proportional Integral Derivative). Robot stability is controlled using PID with feedback from IMU MPU6050 for tilt angle control and feedback from MS5803 pressure sensor for depth position control. This underwater robot is requipped with six DC motors, four DC motors are used to drive the robot in a horizontal direction (forward, backward and turn). In addition, the robot is also equipped with two lamps for lighting the robot. In this research, the underwater robot can maintain stability when given PID parameter values are 0.001 for Kproll, 0.001 for Kiroll, 1 for Kdroll, 0.001 for Kppitch, 0.001 for Kipitch, 1 for Kdpitch, 5 for Kpdepth, 1 for Kidepth and 1 Kddepth.
subject: Articles
  topic: section
subject: MPU6050
  topic: keywords
subject: MS5803
  topic: keywords
subject: PID
  topic: keywords
subject: Underwater Robot
  topic: keywords
creator: Rista .
creator: Elvan Yuniarti
creator: Dewi Lestari
rights: Copyright (c) 2022 Rista ., Elvan Yuniarti, Dewi Lestari
date: 2022-01-05
publication date: 2022-01-05
starting page: 115
ending page: 123
doi: 10.15408/fiziya.v4i2.23173