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Mona Berlian Sari
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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 2 No 3 (2024): September Edition" : 10 Documents clear
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.
Effect of Calcination Temperature of SiO2-TiO2 Composite XRD Characterization of Crystal Size Structure and Phase Putri, Sri Fany Mulya; Ratnawulan, Ratnawulan; Gusnedi, Gusnedi; Jonuarti, Riri
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.v2i3.65

Abstract

Calcination is often used to activate beneficial metal oxidation in catalysts and improve material stability. In the metal oxidation research used is SiO2-TiO2 nanocomposite because it has advantages over photocatalysts and thermal stability. One important factor that affects is the particle size and crystal phase formed during the calcination process at various temperatures. The purpose of the study was to determine the effect of calcination on changes in phase and crystal structure in SiO2-TiO2 nanocomposites. The material used for the manufacture of nanocomposites is natural silica source from coconut fiber which is burned into white ash. The ash was extracted for the preparation of silica sol by adding Tetraethyl Orthosilicate (TEOS) as a precursor synthesized by the sol gel method then, calcination was carried out with temperature variations of 700 , 800 , and 900 . After calcination, XRD characterization was carried out to obtain crystal sizes of 63.48 nm, 66.87 nm, and 73.83 nm. The phase formed is dominant in TiO2 is rutile and SiO2 is quartz and cristobalite.
The Effect Of Composition Variation On The Functional Groups Of Coconut Husk Ash Silica Nanocomposites With Titanium Dioxide Mardiana, Mardiana; Ratnawulan, Ratnawulan
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.v2i3.66

Abstract

Studie has been performed with the title Effect of Composition Versions on Useful Corporations of Coconut Coir Ash Silica Nanocomposites with Titanium Dioxide. This study goals to determine the traits of silica gel from the processing of coconut husk ash thermodiffcation TiO2 in phrases of useful groups variations in silica composition with titanium dioxide, particularly 3.5: 1.5 and 4: 1 (grams). The synthesis of silica gel from coconut husk ash become finished the use of the gel sol method. FTIR (Fourier Transform Infrared) characterization effects show the achievement of TiO2 changed silica gel and silica gel synthesis proven with the aid of the absorption of Si-O-Si and Si-OH in silica gel and Ti-O-Ti absorption in TiO2 changed silica gel. Based on the FTIR spectrum, it was obtained that during all samples an ordinary practical group of TiO2 seemed, specifically Ti-O at an absorption peak of about 500-600 cm-1 O-H vibrational bond stretching and O-H bending at an absorption height of 1500 - 3500 cm-1 Appeared in all samples indicating the presence of water molecules. In addition, Ti-O-Si vibrational bonding at absorption peaks of 700 - 1000 cm-1 regarded on all samples indicating the archiement of the composite synthesis method TiO2 - SiO2.
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.
Microwave Absorption Properties of Fe3O4/Graphene Oxide Nanocomposites Synthesized from Coconut Shell Waste Syahputra , Ilham; Darvina, Yenni; Ratnawulan, Ratnawulan; Hidayat, Rahmat
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.v2i3.69

Abstract

Electromagnetic wave absorption technology is one of the technologies that need to be developed to control the problems caused by Electromagnetic Interference (EMI). This technology has created a material called Radar Absorbing Material (RAM) that Making RAM can be formed with material modifications such as nanocomposite materials. The manufacture of Fe3O4 nanocomposites and Graphene Oxide (GO) synthesized from coconut shell waste is one of the studies that need to be studied and developed at this time. Variations in the composition of Fe3O4 and GO used can determine the ability of microwave absorption. This study aims to analyze the microwave absorbing properties of Fe3O4/GO nanocomposites from coconut shell waste. The materials used to make this nanocomposite are magnetite (Fe3O4) and GO synthesized from coconut shell waste. This research uses experimental methods, with variations in the composition ratio between Fe3O4 and GO, namely 20% Fe3O4: 80% GO, 30% Fe3O4: 70% GO, and 40% Fe3O4: 60% GO. Characterization was carried out using a Vector Network Analyzer (VNA) to determine the nature of microwave absorption. The VNA characterization results found the influence of variations between Fe3O4 and GO composites. Based on the research results, the lowest absorption coefficient percentage was 95.50% at a frequency of 8.38 GHz for the composition variation of 20% Fe3O4 and 80% GO. The highest absorption coefficient was 96.43% at a frequency of 8.42 GHz for the composition of 40% Fe3O4 and 60% GO. The addition of Fe3O4 can make the absorption value of the material to microwaves higher.
Microzonation of Seismic Vulnerability In Padang Panjang Timur Sub-District, Padang Panjang City Based on Microtremor Measurement Elizha, Zellvia; Syafriani, Syafriani; Hamdi, Hamdi; Dwiridal, Letmi
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.v2i3.70

Abstract

Padang Panjang City is one of the cities in West Sumatra which has a high level of risk of the natural phenomenon of earthquakes. This is due to the fact that it is traversed by the active Sumatran fault which can cause earthquakes at any time. The purpose of this study was to determine the value of the seismic vulnerability index in Padang Panjang Timur District, Padang Panjang City using microtremor measurements. This type of research is descriptive research, namely research that describes the symptoms or phenomena studied. The location for data collection was Padang Panjang Timur District, Padang Panjang City, West Sumatra Province. There are 15 data collection points, and the distance between points is 500 m. The microtremor method of measuring this microtremor can determine the dominant frequency value (f0), amplification factor (A0), and susceptibility index value (Kg). Microtremor data processing was used to obtain the H/V curve at each point of data collection using Geopsy software. The results of the microzonation of the seismic susceptibility index (Kg) ranged from 1.05 × 10-6 s²/cm to 170.09 × 10-6 s²/cm. High seismic vulnerability index values ​​are found in the Koto Panjang Sub-District, Tanah Pak Lambik Sub-District, Guguk Malintang Sub-District, Ngalau Sub-District and Ganting Sub-District.
Evaluation of Pumice Source from Lubuk Basung Based on Magnetic Susceptibility Values Febriwanti, Mutiara Kusuma; Hamdi, Hamdi; Fauzi, Ahmad; Syafriani, Syafriani
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.v2i3.80

Abstract

Lubuk Basung is one of the distribution areas of pyroclastic material from the Maninjau Caldera eruption that occurred 50,000 years ago and produced two different types of white pumice. The research purpose is to reveal whether the pumice samples taken from Lubuk Basung come from the same eruption or not based on susceptibility of magnetic scores. The susceptibility of magnetic scores can be measured by the Rock Magnetic Method using the Bartington Magnetic Susceptibility Meter Type B. From the magnetic susceptibility values obtained, normality test, homogeneity test, and mean similarity test of two different samples were conducted using IBM SPSS Statistics software. In the LBS 23-02 sample, a susceptibility of magnetic range of 41.9 x 10-8 m3/kg to 582.2 x 10-8 m3/kg was obtained, and the LBS 23-03 DB sample obtained a magnetic susceptibility value of 42.9 x 10-8 m3/kg to 535.5 x 10-8 m3/kg. From the normality, homogeneity, and mean similarity test, it is known that the LBS 23-02 and LBS 23-03 DB samples come from a population that is not distributed normally and not homogeneous, but an average comparison is obtained with a score of significance at 0.0426, which can be concluded that the two pumice samples found in Lubuk Basung come from the same eruption source, although each sample has different types and characteristics.
Design of Servo-Controlled Titrant Flux Regulation System Zulma, Degito; Sari, Mona Berlian; Yohandri, Yohandri; Darvina, Yenni
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.v2i3.82

Abstract

The advancement of automation in laboratory instrumentation has significantly transformed the field of chemical analysis by enhancing precision, efficiency, and reproducibility. The development of an advanced titrant flux regulation system presents substantial potential benefits. This research focuses on the design of a Titrant Flux Regulation System utilizing a Servo Motor and PCA9685 Driver for Automated Titrators, with the aim of improving the accuracy of titration processes. The system employs a servo control mechanism driven by the PCA9685 driver to precisely maneuver the burette crank. The methodology encompasses system design, simulation, prototyping, and performance testing. A microcontroller-controlled servo motor ensures precise movements of the burette crank, enabling accurate titrant delivery. The developed prototype demonstrates the ability to regulate titrant flow with high precision, facilitating fine-tuned control of titrant volume to meet specific titration requirements. The servo and PCA9685-based system shows significant promise for application in automated titrators, offering enhanced accuracy and control of titrant flow, thereby optimizing the titration process.
Systematic Literature Review of TCS34725 Sensor Applications in Various Fields Anisa, Widya; Sari, Mona Berlian; Yohandri, Yohandri; Asrizal, Asrizal
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.v2i3.83

Abstract

The TCS34725 sensor, recognized for its precise color detection across the visible spectrum, is essential in agriculture, food safety, healthcare, security, and industry. As automation advances, reliable color detection systems are crucial for replacing subjective and inconsistent manual assessments. However, challenges such as varying lighting conditions and the need for advanced data processing techniques impact its accuracy and integration. Enhanced algorithms and machine learning applications enable real-time analysis, reducing human error and ensuring reliable results. The sensor's versatility supports applications such as monitoring crop ripeness, detecting harmful substances in food, and aiding medical diagnostics like urine analysis. This study conducts a systematic literature review to explore trends, advancements, and gaps in the sensor's applications. Findings emphasize its role in advancing Industry 4.0 by digitizing processes, fostering sustainable innovations, and improving operational efficiency, reliability, and quality of life.
Determination of the structure and crystallite size of pumice magnetic minerals from Ngarai Sianok using X-Ray Diffraction (XRD) Azizah, Nur; Hamdi, Hamdi; Syafriani, Syafriani; Dwiridal, Letmi
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.v2i3.86

Abstract

The structure and size of crystal are are important aspects of magnetic minerals pumice from Ngarai Sianok  to understand the geological processes of the area. Volcanic rocks in Ngarai Sianok contain magnetic minerals with unknown crystal structures. The crystal structure and size in pumice are analyzed using X-Ray Diffraction (XRD), where the type of magnetic mineral and crystal structure are determined by comparing the data measurement with the mineral database, while the crystal size can be determined using the Scherrer equation. Magnetic minerals in pumice from Ngarai Sianok are magnetite (Fe3O4) with a cubic mineral structure, ilmenite mineral (FeTiO3) with a hexagonal structure, and hematite mineral (Fe2O3) with a rhombohedral structure. The crystal size of magnetic minerals vary. The lowest is at an angle of 18.25 with a FWHM value of 0.1279 which results in a crystal size of 62.8995 nm. The highest crystal size is at an angle of 35.46 with a FWHM value of 0.0624, resulting in a crystal size of 133.6609 nm. FWHM value is inversely proportional to the size of the crystal, meaning that the size of the crystal formed is getting smaller with increasing FWHM. The average size of pumice crystals formed in Ngarai Sianok was calculated to be 102.6392 nm, the small crystal size indicates the rapid cooling of magma, usually occurring during explosive eruptions.

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