cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Mona Berlian Sari
Contact Email
monaberliansari@fmipa.unp.ac.id
Phone
(0751) 7057420
Journal Mail Official
jeap@ppj.unp.ac.id
Editorial Address
Jl. Prof. Dr. Hamka, Air Tawar Padang 25131, Indonesia
Location
Kota padang,
Sumatera barat
INDONESIA
Journal of Experimental and Applied Physics
Published by Universitas Negeri Padang
ISSN : 29880378     EISSN : 29879256     DOI : -
Core Subject : Science, Engineering,
Control & Systems Engineering Electrical & Electronics Engineering Materials Science & Nanotechnology Physics
Journal of Experimental and Applied Physics: an international peer-reviewed open-access journal dedicated to interchange for the results of high-quality research in all aspects of theoretical physics, applied physics, electronics and instrumentation, material physics, biophyiscs, geophysics, high energy physics and computational physics.
Arjuna Subject : Fisika dan Astronomi - Instrumentasi
Articles 10 Documents
 1 
Search results for , issue "Vol 1 No 3 (2023): December Edition" : 10 Documents clear
Effect of Carboxy Methyl Cellulose Addition with Glycerol Plasticizer on Physical Properties of Taro-based Biodegradable Plastics Urwatil Wuskha; Ratnawulan Ratnawulan; Gusnedi Gusnedi
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.v1i3.28

Abstract

Widespread use of synthetic plastics that are not biodegradable and made from non-renewable petrochemical sources endangers the environment. Using biopolymers like starch, gluten, and guar gum to create biodegradable plastics is one way to reduce the use of synthetic plastics. One of the materials that can be used as biodegradable is taro starch. This study's goal was to ascertain how adding carboxymethyl cellulose (CMC) concentration affected the physical characteristics of taro-based biodegradable plastic. This sort of study is experimental, with the concentration of carboxymethyl cellulose (CMC) added as the independent variable and the mass of starch, glycerol plasticizer, distilled water, and sample thickness of 0.24 mm as the controls. Tests carried out include tensile strength and elongation tests as well as water resistance tests and tests of the ability of biodegradable plastics to degrade in soil. This study involved altering CMC by up to 15%, 20%, 25%, 30%, and 35% (w/w starch) while using up to 5 grams of taro starch as the mixing material and up to 3 ml of glycerol plasticizer as the plasticizer concentration. The test findings demonstrated that adding starch with a CMC concentration of up to 35% w/w had an impact on the plastic's tensile strength and elongation values. The percentage of weight loss of biodegradable polymers increases when CMC concentration is added, and the level of water resistance decreases when CMC concentration is added in amounts up to 35% w/w starch.
Development of Measurement Instrument of Translation Motion in Constant Acceleration Experiment using Infrared Obstacle Avoidance Sensor Module and MPU 6050 Based on ATmega32U4 Microcontroller Ilham Hafidzh Wijaya; Yohandri Yohandri; Asrizal Asrizal; Yulkifli Yulkifli
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.v1i3.29

Abstract

Physics is a field of study that holds significant influence in the development of science and technology. Many natural phenomena are related to physics and can be explained through experiments. From the results of conducted research, it is known that measurements for Translation Motion in Constant Acceleration experiments were carried out manually using standard measuring tools. The limitations of these measuring tools rendered the process impractical and susceptible to errors. To overcome these limitations, an experimental device equipped with automated digital measurement instruments was developed. The objective of this research is to ascertain the design specifications and performance specifications of the experimental device. The performance specifications of the experimental device include a track length of 2 meters and a width of 13mm. It involves the use of a servo motor, Infrared Obstacle Avoidance Sensor Module, and MPU 6050. The design specifications of the experimental device include an angle measurement accuracy of 92%, time measurement accuracy of 89%, velocity measurement accuracy of 87%, and time measurement precision of 92%. So, it is concluded that the measurement instrument can work properly.
Microzonation Analysis of Soil Vulnerability Index of Sumani Region As Part of The Sumatra Fault System Using Microtremor: Analisis Mikrozonasi Indeks Kerentanan Tanah Daerah Sumani Sebagai Bagian Dari Sistem Sesar Sumatera Menggunakan Metoda Mikrotremor Lingga Ayunda Pradipta; Syafriani Syafriani; Hamdi Hamdi; Letmi Dwiridal
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.v1i3.30

Abstract

West Sumatra is a province located on the west coast of the island of Sumatra in the middle which has four active fault segments. Nagari Sumani is part of the Sumani Segment line, which makes Nagari Sumani very vulnerable to earthquakes. Efforts are needed too . reduce the impact of the earthquake in Nagari Sumani. This study aims to determine the value of soil vulnerability index (Kg) and soil vulnerability index microzonation (Kg) in Nagari Sumani, specifically Jorong Pinjangek and Jorong Guci, in the area of ​​the Sumani Segment route. The microtremor method of measuring this microtremor can determine the dominant frequency value (f0), amplification factor (A0), and soil susceptibility index value (Kg). Microtremor data was used to obtain the H/V curve at each point of data collection using Geopsy software. Seismic vulnerability index microzonation is carried out using software Surfers 13. The results of this study indicate that the seismic vulnerability index in Nagari Sumani ranges from 3.65 x 10-6 s2/cm to 99.51 x 10-6 s2/cm which has low, medium, to high categories. The results of microzonation of low soil susceptibility index (Kg) are at points 1,2,7, and 8 with a value range of 3.65 x 10-6 s2/cm to 41.02 x 10-6 s2/cm, the medium category is in points 3 and 5 with a value range of 50.02 x 10-6 s2/cm to 54.23 x 10-6 s2/cm, while the high category is at points 4 and 6 with a value range of 63.32 x 10-6 s2/cm to 99.51 x 10-6 s2/cm .
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.
Analysis Of The Relationship Of Rare Earth Elements To Magnetic Mineral Concentrations In Pumice Around Sigura-Gura Dian Laila Fitri; Hamdi Hamdi; Ahmad Fauzi; Letmi Dwiridal
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

Abstract

Rare earth elements are part of one of the strategic minerals and are included in the "critical minerals". Concentrations of rare earth elements are economically precious deposits that can be used as mining commodities. Pumice is the result of volcanic eruptions and it is one of the minerals containing the rare earth elements, one of which is found in Sigura-Gura, North Sumatra. The research aims to determine the composition of rare earth elements, the relationship between rare earth elements and magnetic mineral concentration, and to determine the concentration of magnetic minerals in pumice in Sigura-gura. The method employed is rock magnetic method with Bartington Magnetic Susceptibility Meter Sensor type B (MS2B), and X-Ray Fluorescence (XRF). Results indicated that Sigura-Gura pumice samples, and Sigura-Gura Waterfall have quite varied magnetic mineral concentrations with a range of values from 111,3 x 10-8m3/kg to 349,9 x 10-8m3/kg, with antiferromagnetic magnetic properties and grain types with almost no SP grains. Samples of Sigura-Gura pumice contain elements of Eu, Ce, and Y, while samples from Sigura-Gura Waterfall contain elements of Eu and Y. There is a correlation between the amount of magnetic minerals and rare elements, and the more elements are present in a sample, the lower the value that is produce, and the greater the percentage of elements obtained, the smaller (%) is obtained.
The Effect of Reflux Time from Natural Zeolite on Electrical Conductivity Fadli M; Gusnedi Gusnedi; Ratnawulan Ratnawulan; Riri Jonuarti
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.v1i3.33

Abstract

This study aims to determine the electrical properties, namely the value of the electrical conductivity of natural zeolite. Natural zeolite was synthesized using the reflux method with NaOH as an activator with variations of 12, 24, and 36 hours with a molar concentration of 5 M NaOH. Tests were carried out using XRF characterization (X Ray fluorescence), XRD (X Ray Diffraction), and LCR Meter. The XRD results showed the highest peak value at 36 hours of 85.22 nm. The XRF results of the zeolite elements formed were 66.087% SiO2 and 8.45% Al2O3. And in the LCR Meter test, the highest conductivity value was obtained at 36 hours of reflux with a conductivity value of 5.5x10-2 S/m. The value of the electrical conductivity is directly proportional to the particle size where the greater the conductivity value the greater the particle size produced.The electrical conductivity results showed that zeolites are included in semiconductor materials and have the potential as supercapacitor electrodes
Analysis Of Earthquake Fault Type In 2022 in the Mentawai Region Using Waveform Inversion Method Ika Sri Fahmi; Syafriani Syafriani; Hamdi Hamdi; Letmi Dwiridal
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.v1i3.34

Abstract

Indonesia is a country prone to earthquake disasters, because Indonesia is located in the collision area between plates, and one of the areas in Indonesia where plate movements often occur is Mentawai. Analysis of waveform data on the 2022 earthquake in the Mentawai region was carried out to determine the type of fault. The data used in this research is local seismic data downloaded from webdc.eu. Seismic data was analyzed using waveform inversion method implemented in ISOLA program. In the ISOLA program, data processing is carried out which includes: inputting 3-component seismic data, earthquake info events, selecting stations, green functions, performing inversion, and displaying results in the form of tensor moment values, strike, dip, and rake values. From the data analysis, the moment tensor value is obtained with the range of each component of M11 is -8.348 to -3.673, M22 is 0.710 to -2.037, M33 is 7.639 to 5.710, M31 is 2.050 to 3.761, M32 is 3.484 to -5.672, M12 is -2.751 to 2.455. Then the inversion results obtained in the form of fault parameters, namely strike, dip, and rake for two nodals that will be analyzed to determine the fault plane. Based on the moment tensor value, it is found that the type of earthquake fault in 2022 in Mentawai region is dominated by reverse fault and oblique fault patterns.
Designing Automatic Safe Security Devices Using Microcontroller Based RFID and Fingerprint Angga Saputra; Yohandri Yohandri
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.v1i3.35

Abstract

A safe is a fire-resistant metal cabinet or box that is usually used by the owner to store valuables (such as money, valuable papers, jewelry, etc.) from thieves/burglars. Safes are generally in the form of cubes/blocks or cylinders. Safes are usually wall-mounted, as well as large room-shaped safes. But not a few also know the weaknesses of the security so that the safe is easily stolen. Based on the description above, in this study the authors are interested in designing an automatic safe system using a fingerprint microcontroller-based in the main system, this automatic safe is regulated by the Arduino Atmega 2560 microcontroller with the Arduino IDE programming language. The safe system automatically works when the user enters the fingerprint and RFID tag correctly, the safe will open. Based on data analysis, it is obtained in the form of a mechanical tool in the test, the characteristics of the sensor, accuracy and precision of the tool are obtained. The characteristics of the sensor can be seen from the fingerprint sensor and RFID sensor. The accuracy value of the sensor on the tool, namely the fingerprint sensor and RFID sensor, the accuracy is very good, the accuracy of the RFID sensor voltage is 99.73% while the accuracy value of the RFID sensor has very good accuracy.
Determination of Thermal Conductivity and Porosity of Composite Panels from Fibers, Bagasse Powder and Polypropylene (PP) Plastic Waste Azca Aryadiva Mahengga; Yenni Darvina; Ramli Ramli; Fadhila Ulfha Jhora
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.v1i3.36

Abstract

Global warming causes temperatures on the earth's surface to increase. High temperatures during the day will make the temperature in the room of the residential house increase. The impact will affect the warmth of residents. One of the causes of the increase in indoor temperature is due to the absorption of solar heat by the components of the walls and roof. One alternative that can be done is the manufacture of composite panels that act as heat insulators using bagasse fibers, bagasse powder and the matrix of polypropylene plastic waste with low thermal conductivity, and high porosity. The composition of the composite varies the percentage of fibers and powders with a fixed percentage of polypropylene plastic waste of 90%. The percentage variation of polypropylene plastic waste of bagasse fiber and powder used is 100%:0%:0%, 90%:10%:0%, 90%:8%:2%, 90%:6%:4%, 90%:4%:6%, 90%:2%:8%, and 90%:0%:10%. Based on the test results, successive thermal conductivity values were 0.226715 W/moC, 0.16241 W/moC, 0.13543 W/moC, 0.09582 W/moC, 0.11457 W/moC, 0.15351 W/moC, 0.18276 W/moC. The porosity values of successive samples were 0.63116%, 2.84024%, 3.36151%, 3.85179%, 3.24880%, 3.09383%, 2.65145%. From the test results, it was obtained that variation 4 had the highest thermal conductivity value with a value of 0.09582 W / moC. while the highest porosity value was obtained in variation 4 with a value of 3.85179%. Composite panels with a variation of 4, and a variation of 5 are optimum variations that can be used as a good heat insulation material.
Design A Real-Time Fish Feeding Control System on The Internet of Things Mia Febrianty; Asrizal Asrizal; Hufri Hufri; Rio Anshari
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.v1i3.37

Abstract

Scheduled feeding is very important in fish farming. Proper and scheduled feeding will increase yields and pond water quality. Fish farmers often ignore feeding according to fish needs. So that it worsens the water quality, as a result the yield and survival of fish decreases. This problem can be overcome by creating a system that can provide feed based on the ideal dose of feed to fish, in order to reduce pollution of pond waters and increase fish survival. This study aims to determine the specifications of accuracy and precision of laboratory scale systems and specifications of accuracy of field test scale systems. The research method used is engineering research method. The data obtained is measured by direct and indirect measurement techniques. This system uses wemos D1 mini, arduino cc, blynk software, RTC DS3231, load cell, DS18B20 and servo. The laboratory scale accuracy and precision specifications of the feeding control system on the measurement of the weight of the system tube feed are 99.70% and 99.80%, on the system container are 98.87% and 98.87%, while on the system temperature measurement are 98.10% and 97.96%. The accuracy value of the field test scale is 98.38%.Based on the results of testing the accuracy and precision of the fish feeding device, it is found that the design of a real time fish feeding system based on the internet of things can be used in monitoring and automatic feeding activities.

Page 1 of 1 | Total Record : 10

 1 

Filter by Year

2023 2023


Reset
Filter By Issues
All Issue Vol 3 No 3 (2025): September Edition Vol 3 No 2 (2025): July Edition Vol 3 No 1 (2025): March Edition Vol 2 No 4 (2024): December Edition Vol 2 No 3 (2024): September Edition Vol 2 No 2 (2024): June Edition Vol 2 No 1 (2024): March Edition Vol 1 No 3 (2023): December Edition Vol 1 No 2 (2023): September Edition Vol 1 No 1 (2023): June Edition