Article Per Year (5 Year)
p-Index From 2020 - 2025
4.811
P-Index
This Author published in this journals
All Journal BULETIN FISIKA Jurnal Penelitian Pendidikan IPA (JPPIPA) JURNAL PENDIDIKAN TAMBUSAI Jurnal Ilmu Fisika Eksakta : Berkala Ilmiah Bidang MIPA MANAZHIM Pelita Eksakta Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Pillar of Physics Education : Jurnal Berkala Ilmiah Pendidikan Fisika Pillar of Physics: Jurnal Berkala Ilmiah Fisika Indo-MathEdu Intellectuals Journal Georest: Geoscience, Remote Sensing, and Technology Journal of Climate Change Society Time in Physics: Journal for Theoretical, Instrumentation, Material-Molecular, and Education Physics Journal of Experimental and Applied Physics
Harman Amir
Universitas Negeri Padang
Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Other

Published : 59 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 9 Documents
Search
Journal : Journal of Experimental and Applied Physics

 1 
Analysis Of The Relationship Of Rare Earth Elements To Magnetic Minerals In Pumice In The Southern Tip Of Lampung Province Rifqa Hayati; Hamdi Hamdi; Letmi Dwiridal; Harman Amir
Journal of Experimental and Applied Physics Vol 1 No 3 (2023): December Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v1i3.31

Abstract

In advanced clean energy technologies, rare earth elements (REEs) are an important component. The position of rare earth elements in the future is increasingly strategic so it is necessary to strive to be developed sustainably. At the southern tip of Lampung province, rare earth elements are not yet known. The aims of this study were to analyze the magnetic susceptibility value, composition and percentage of rare earth elements, and the relationship of rare earth elements with magnetic mineral concentrations in pumice at the southern tip of Lampung Province. The method employed is rock magnetic method with Bartington Magnetic Susceptibility Meter Type B and X-Ray Fluorescence. Pumice in the southern region of Lampung Province has diverse magnetic susceptibility values, pumice from Bandar Lampung City has the highest magnetic susceptibility value, while the lowest is in South Lampung Regency. This pumice has antiferromagnetic and ferrimagnetic magnetic properties, and was found to have almost no superparamagnetic grains and also found a mixture of superparamagnetic and coarse grains. The composition of rare earth elements contained in pumice at the southern tip of Lampung Province obtained 3 rare earth elements, samples from Bandar Lampung City contained europium, cerium, and yttrium elements and samples from South Lampung Regency contained europium and yttrium elements. Rare earth elements and magnetic mineral concentration have a relationship, the obtained values decrease with increasing percentage of rare earth elements.
Geophysics Quantitative Research Mapping of Geomagnetic Method Implementation for Geothermal Exploration: A Bibliometric Analysis Magribi, Fatin; Asrizal, Asrizal; Amir, Harman; Fitri, Leni
Journal of Experimental and Applied Physics Vol 3 No 3 (2025): September Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v3i3.106

Abstract

Indonesia is the second country with the largest geothermal potential in the world because Indonesia has many volcanoes and active tectonic activity causes the formation of geothermal energy around the mountain. The population growth rate in Indonesia is soaring, this condition is inversely proportional to the availability of non-renewable energy in Indonesia. The solution is to look for alternative energy substitutes, namely renewable energy, for example geothermal. This study aims to see the development and trends in the use of geomagnetic methods for geothermal exploration. The method used is bibliometric with a quantitative approach. Data retrieval and processing used the publish or perish application integrated with Google Scholar. The data used were 200 articles published on Google Scholar during 2015-2025 and 80 keywords found. Data analysis techniques by looking at the development of article trends each year, data network visualization, data overlay visualization and data density visualization. The results obtained from publications with the topic of geomagnetic method utilization trends for geothermal exploration in 2015-2025 increased every year. For the results of data network visualization, not only Indonesia but various international countries have also begun to utilize geothermal. The results of the visualization of Indonesia's geothermal data overlay were much sought after in 2019.
Hydroponic Plant Nutrition Measurements System using Display Smartphone Internet Based of Things Dwina Melisa; Asrizal, Asrizal; Yulkifli, Yulkifli; Hufri, Hufri; Amir, Harman
Journal of Experimental and Applied Physics Vol 2 No 1 (2024): March Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i1.38

Abstract

Hydroponics is an alternative for people who want to garden, but don't have enough space to grow crops. The most important issue that must be considered in cultivation is the provision of sufficient nutrients for plants. Lack of nutritional value results in less maximum yields. Nutritional measurements can be carried out without having to go to the cultivation site. The purpose of this study was to determine the performance specifications of the nutrient measurement system components for hydroponic plants. Determine the precision and accuracy of the nutrient measurement system on the results of limited-scale tests and field-scale test results. This type of research is engineering research. The data analysis technique used is descriptive data analysis and error analysis. From the data analysis it can be stated that three research results are first, the specification of system components includes sensor performance, ESP8266, LCD, Blynk. Second, the precision of the average nutrition on a limited scale is 99.97% and the average accuracy is 99.14%. Third, precision of nutrition on a field scale is 99.47% and the average accuracy is 99.14%. Field-scale test results were carried out for 3 days to obtain varied data. For cultivators of hydroponic plants it is useful for measuring nutritional value so they no longer make measurements manually.
Design of a modeling tool for wheel connected with a belt using speed and time control for video tracker analysis Sari, Reza Novita; Asrizal, Asrizal; Amir, Harman; Mairizwan, Mairizwan
Journal of Experimental and Applied Physics Vol 2 No 3 (2024): September Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i3.63

Abstract

The influence of the advances of science produces technological innovations that leverage on education, economics, social and self-development. In education, design of laboratory experimental modeling tools continues to be carried out by researchers to improve learning effectiveness. Wheel movement experiments related to belts include one of physic learning activities. The parameter measured from the creation of modeling tool is the wheel speed and analysis of wheel motion related to the belt. The system can be controlled in speed and time using Blynk application. Video recordings are used as circular motion analysis material on Tracker applications. The design of system is a box size 35 cm in length, 20 cm in width and 18 in height consisting of one switch, LCD, and two wheels connected by a belt. Wheel 1 has a diameter of 15 cm and wheel 2 is 10 cm. Based on data analysis, the results of physical parameters were obtained with high accuracy and precision values using standard measuring instruments, namely tachometers, calculation of the theoretical formula. The system's precision was 98.84% and speed accuracy for 30 rpm, 50 rpm and 80 rpm were 99.3%, 99.19% and 99.93%. Frequency values increased according to the increase in input speed and compared to the reverse period.  The angle speed will increase as the wheel spokes become smaller. So, the wheel modeling tool related to the belt using speed and time control with the Blynk application as well as the Tracker video alysis can work effectively and validly.
Design and Build an Automatic Feeding System for Catfish Farming based-on Internet of Things (IoT) Fajri, Mukhlis Surito; Asrizal, Asrizal; Amir, Harman; Mairizwan, Mairizwan
Journal of Experimental and Applied Physics Vol 2 No 4 (2024): December Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i4.64

Abstract

Fish farming represents a sector aimed at boosting the national economy. The Ministry of Marine Affairs and Fisheries has prioritized programs to support the growth of catfish farming.. However, there are still obstacles experienced by cultivators such as irregularities in feeding time and uneven distribution of feed. Therefore, a solution is needed in the form of designing an efficient system in providing fish feed. The system is developed using ESP32 microcontroller, servo motor, stepper motor, loadcell, and connected to the website for remote control. The system utilizes a motor, load cell, and is integrated with a website for remote operation. This research employs an engineering approach, focusing on system design and testing. The findings indicate that the system achieves an average feed weight measurement accuracy of 98.31%, demonstrating reliable performance in both laboratory and field-scale tests. This system is expected to increase efficiency, practicality, and effectiveness in catfish farming, as well as providing real-time information about feed and feeding schedules.
Design and Construction of a Mathematical Pendulum Harmonic Motion Experiment System Using Arduino Based E18-D80Nk Proximity Sensor Mulyadi, Endri; Asrizal, Asrizal; Amir, Harman; Sari, Mona Berlian
Journal of Experimental and Applied Physics Vol 2 No 3 (2024): September Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i3.68

Abstract

Experimentation is part of the stages of the scientific method that has a big role to test a phenomenon that occurs. One of the physics lessons proven through experiments is the harmonic motion of a mathematical pendulum. One of the problems with the existing experimental equipment is the variation in rope length and the manual measurement of rope length. One solution to overcome this problem is to create a Mathematical Pendulum Harmonic Motion Experiment System Using the Arduino-based E18-D80NK Proximity Sensor. This tool is designed to facilitate practitioners when conducting experiments and save practicum time. Research was conducted to determine the accuracy and precision of the tool. The experimental results of the device can be displayed on the LCD.  The precision and accuracy of the experimental system with the following details: Average error of 0.65% for comparison of system t value and standard t and average error of 0.55% for comparison of system gravitational acceleration value with theoretical gravitational acceleration for variation of rope length. As for the average value of accuracy of 0.9990583 or 99.9% for a fixed rope length, and the average accuracy of 0.99793367 or 99.7% for a fixed number of oscillations.
Using Sensors with the Internet of Thing for Earthquake Detection System : A Systematic Literature Review Putri, Shinta Maharani; Asrizal, Asrizal; Amir, Harman; Mairizwan, Mairizwan; Fitri, Mutiara Nurul
Journal of Experimental and Applied Physics Vol 2 No 4 (2024): December Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i4.73

Abstract

Every human being needs safety in their lives from all disasters. However, earthquakes are the most impactful geological natural phenomena that can threaten human safety. One solution is to utilize an earthquake detection system to anticipate such disasters by utilizing sensor technology and the Internet of Thing (IoT). The purpose of this research is to evaluate the effectiveness of various earthquake detection technologies, including vibration sensors such as SW-420, MAG3110, DHT11, ADXL335 Accelerometer, HC-SRO4, and 801S vibration sensor, as well as IoT integration in early warning systems. The method used is Systematic Literature Review (SLR) with PRISMA design, including the steps of identification, screening, eligibility, and analysis of articles taken from the Google Scholar database for publications in 2018-2024. The results showed that the application of technologies such as Fuzzy Logic and vibration sensors, as well as IoT integration, significantly improved the effectiveness of earthquake detection and warning.
Magnetic Susceptibility of nanoparticles in the Lubuk Basung Region Janna, Anisa; Hamdi, Hamdi; Amir, Harman; Zulhendra, Zulhendra
Journal of Experimental and Applied Physics Vol 2 No 4 (2024): December Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i4.87

Abstract

Nanoparticles is particles that have size very small, generally in range from 1 to 100 nanometers. Nanoparticles have one​ uniqueness with exists characteristic superparamagnetic. Characteristic superparamagnetic is properties the material has magnetization tall if given external magnetic field, however when No There is external magnetic field mark the average magnetization is zero. On size certain, nanoparticles can show transition from superparamagnetic to ferromagnetic or antiferromagnetic. Influence size grain and structure crystal to characteristic magnetic is one​ method in determine susceptibility. Susceptibility magnetic is defining constant​ big small a material to magnetized. Study This aim to the analyze mark susceptibility magnetic from nanoparticles rock floating in the area Lubuk Basung. Method used​ is method magnetism rock with tool Bartington Magnetic Susceptibility Meter Type B. Research results shows in the area Lubuk Basung LBS 23-02 and LBS 23-03 are available concentration content high Fe element and concentration content element Ti more low. Magnetic susceptibility in the area Lubuk Basung have characteristic antiferromagnetic magnetism, and has type grain almost no There is details superparamagnetic and also has mixture superparamagnetic and granular rough or details superparamagnetic <0.05 μm equivalent with <50 nm. So that depicted that size nanoparticles contained in the sample rock floating LBS 23-02 and LBS 23-03 have size nanoparticles below 50 nanometers with characteristic antiferromagnetic magnetism.
Analysis Of Normal Stress Distribution Of Earthquakes In The Fault Segment Of The West Sumatra Region Using The Stress Inversion Method: English Daya, Ellen Kurniawati; Syafriani, Syafriani; Hamdi , Hamdi; Amir, Harman
Journal of Experimental and Applied Physics Vol 2 No 4 (2024): December Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i4.88

Abstract

West Sumatra was one of the regions on the island of Sumatra that had a high level of earthquake proneness. There were five segments of the Sumatran fault in this region. Normal stress distribution analysis could be carried out to determine tectonic activity in earthquake-prone areas. This research used the stress inversion method to identify normal stresses, which could trigger or inhibit fractures. The data used involved 17 fault plane parameters (strike, dip, rake) from earthquakes with a magnitude of ≥4.7 that occurred in the West Sumatra region from 1967-2023. The type of fault analysed was strike-slip, and the earthquake's epicenter was located on land. The results of this research provided an overview of the position and direction of normal stress due to earthquakes in the West Sumatra region. The distribution of the normal stress position of the fault segment was shown through the pressure and tension axes (P/T), with respectively sigma1, sigma2, and sigma3 having azimuth/plunge values of 353.990/4.760, 247.260/73.860, and 85.310/15.380. The direction of maximum normal stress (sigma1) is spreading in the northern part of the fault segment. In contrast, intermediate normal stress (sigma1) is situated in the western sector of the fault segment, while minimum normal stress (sigma3) is in the eastern part of the fault segment in this region. Analysis of the normal stress distribution is showing that the Talamau segment is being dominated by maximum normal stress, indicating that the Pasaman area and its surroundings are being considered vulnerable to faults and earthquakes.
Co-Authors - Afrizal - Hamdi Aditio, Rama Aflah Zaharo Akmam Akmam Amali Putra Amirullah, Fajar Fikri Anzuye, Ivo Jihan Aprimanda Mulya Rizki, Rifa Ari Nuryadi Asrizal Asrizal Aulia Fitri Bana, Vrielsha Bavitra, Bavitra Chyntia Arman Daya, Ellen Kurniawati Denandra, Alza Desi Anriani Dwina Melisa Fadhila Ulfa Jhora Fajri, Mukhlis Surito Fatni Mufit Fauziah Fauziah Fitri, Leni Fitri, Mutiara Nurul Fuja Novitra Hamdi , Hamdi Hamdi Hamdi Hamdi Hamdi Hamdi Rifai Handayani, Silvia Sri Hayyu Yumna Hermanda, Richi Junia Hidayati Hidayati Hidayati Hidayati Hufri Hufri Iing Pebrika Janna, Anisa Juliana Dekriani Letmi Dwiridal Letmi Dwiridal Madinah, Nur Magribi, Fatin Mahrizal Mahrizal Mairizwan, Mairizwan Masril Masril Maulida, Yulia Mia Azhari Miftahul Arrazi Mona Trisna Cahyati Muhammad Hafiz Mulyadi, Endri Murtiani Murtiani Mutiara Novichri, Viona Nabila, Yafiatul Nanda, Popi Nira Aslinda Nofi Yendri Sudiar Pakhrur Razi Pramita Syafrina Putri, Shinta Maharani Rahmat Hidayat Ratnawulan Ratnawulan . Rifqa Hayati Rinadi, Aulia Riri Jonuarti Risky Wahyuni Riyasni, Selma Rozi, Hanifsyah Saint Saputra Salsabila, Salsabila Saqilah, Alya Sari, Mona Berlian Sari, Reza Novita Sendi Mutia Solly Aryza Sovia Marsilin Suci Khairani Suherman, Dea Stivani Sumanti, Syahputri Syaflita, Dina Syafriani Syafriani Syafriani, Syafriani Syafriani, - Syerly Kumala Vera Yunita Wardatul Fajriyaty Wulandari, Mia Yelvi Elia Yendri Sudiar, Nofi Yenni Darvina Yosi Elsa Wahyuny Yulkifli Yulkifli Zatil Ismah, Amirah Zikri, Ahmad Raihan Zulhendra Zulhendra Zulhendra Zulhendra Zulhendra, Zulhendra