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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 2 No 1 (2024): March Edition" : 10 Documents clear
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.
Earthquake Intensity Determination Based on Maximum Land Acceleration in Padang City Area Using Atkinson Boore Method (2003) Linda Susanti; Syafriani, Syafriani; Hamdi, Hamdi; Dwiridal, Letmi
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.v2i1.40

Abstract

Geologically, the city of Padang had the potential for large earthquake impacts due to its location within the Sumatran Fault, Mentawai Fault, and above the Subduction Zone. The magnitude of earthquake damage was determined by soil quality factors and earthquake intensity. To determine the extent of damage, the maximum ground acceleration value was used. This value represented the maximum ground vibration acceleration that occurred at a specific location within a particular area, resulting from all earthquakes that occurred during a specific time period. The maximum ground acceleration value and earthquake intensity in the Padang City area could be calculated using the Atkhinson Boore (2003) method. This study was a quantitative research that commenced by examining relevant theories related to the issue at hand. The research then proceeded with the collection of secondary data obtained from the United States Geological Survey (USGS) website. Specifically, earthquake data for the period between 2000 - 2020 in the Padang City area with coordinates LS- LS and BT- BT, and a magnitude M ≥ 5.0 SR depth < 100 km were utilized. Historical earthquake data was employed to determine earthquake intensity values, which were then used to assess the earthquake risk in the Padang City area. Based on the calculation results, the maximum acceleration value of soil was found between 0.519001 g- 0.603847 g. The highest value of maximum acceleration of soil was located in Bungus Teluk Kabung area, while the lowest value was found in Koto Tangah area. The distribution of earthquake intensity (MMI) in Kota Padang area has a value of VIII MMI.
Analysis of Lattice Constant, Structure and Crystal Size of TiO2/Rough Bamboo Acitivated Carbon Nanocomposite Using Mass Variation Hifzi, Zudiya; Darvina, Yenni
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.v2i1.41

Abstract

Energy storage materials such as rechargeable batteries: cameras, cellphones, laptops, and others, are often used for daily needs. The working indicator of the battery is energy storage capacity, which depends on anode material. Generally, battery anodes are made from graphite but have limited energy capacity, which causes frequent overheating. One of the factors that influences energy storage capacity is surface area of the anode, where the smaller the particle size, the greater the storage capacity. So, research was carried out on materials that could replace graphite as an anode material for rechargeable batteries by having superior properties. This material is TiO2/Rough bamboo activated carbon nanocomposite. Nanocomposites will be synthesized using the sol-gel method and then analyzed using XRD to obtain information about lattice constants, structure, and crystal size. So, this research aims to determine the lattice constant, structure, and crystal size of the forming materials such as carbon, activated carbon and TiO2, and the TiO2/Activated carbon nanocomposite. Nanocomposites will be synthesized with mass variations to see the superior properties of the two forming materials. Variations were carried out with mass ratios of TiO2 and activated carbon, respectively, namely 40%:60%, 50%:50%, and 60%:40%. This research shows that the lattice constant in each variation has results that are by the shape of the crystal structure, and the crystal size value of the nanocomposite has reached the requirements as a nanocomposite material, namely a size below 100 nm. Activated carbon appears to have superior properties for smaller particle sizes than TiO2.
Design and Implementation of Intravenous Infusion Monitoring System Based on Wireless Sensor Network with Smartphone Display Teguh, Teguh Afrianda; yulkifli, Yulkifli
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.v2i1.42

Abstract

This research introduces a Wireless Sensor Network (WSN) based infusion monitoring system utilizing Internet of Things (IoT) technology. Infusion management is critical in healthcare, but manual supervision often lacks accuracy and control. Through the use of optocoupler and load cell sensors, this system enables automated calculation of the infusion drop rate per minute and evaluation of the remaining fluid percentage. In this study, tests were conducted using optocoupler sensors to calculate the drop rate per minute and load cell sensors to measure the remaining fluid percentage. Measurement results are monitored via smartphone, allowing healthcare professionals easy and rapid access to data. Furthermore, the innovation of this system lies in the application of Internet of Things (IoT) technology, enabling remote control through Wireless Sensor Network (WSN). Thus, one nurse can oversee multiple infusions using just one smartphone. The testing results demonstrate a high level of accuracy, with an average precision rate of 97% for drop rate measurements and 93% for the remaining fluid percentage measurements. This system offers an efficient and controlled solution for infusion fluid management, ensuring optimal healthcare services for patients. By integrating IoT and WSN technologies, this research paves the way for the development of more advanced and connected infusion monitoring systems, supporting enhanced patient care in the era of globalized healthcare.
Microstructure Analysis of Mass Variations of LiOH/Cassava Peel Activated Carbon Nanocomposite Lidya Agraini; Darvina, Yenni
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.v2i1.43

Abstract

The need for electronic devices has grown quite rapidly. To operate electronic devices, batteries are needed. The most widely used battery is a rechargeable battery type lithium ion battery. the advantages of using rechargeable batteries are practical and easy to carry everywhere. One of the disadvantages of rechargeable batteries is not able to work at high power. For this reason, it is necessary to conduct research on the forming material on the battery anode. This study was intended to characterize the structure, field and crystal size of the mass variation of LiOH/cassava peel activated carbon nanocomposite synthesized using the sol gel method with a mass variation ratio of 40%: 60%, 50% : 50%, and 60%: 40%.The LiOH/cassava peel activated carbon nanocomposite was mixed with PEG 6000 solution stirred at 100º C to form a gel which was dried and pulverized. XRD characterization was carried out and analyzed using High Score Plus software. Carbon has a cubic crystal structure with a diffraction peak of 29.41º. Activated carbon has a hexagonal crystal structure with diffraction peaks of 31.53º and 44.48º. The nanocomposite has a crystal structure that is hexagonal and orthorhombic for the carbon phase, while LiOH is monoclinic with different miller indices. The nanocomposite crystal size is 26.33 nm to 79.01 nm, with the smallest crystal size found when the LiOH/activated carbon nanocomposite variation is 40%: 60%. From the three comparisons, the more carbon the smaller the crystal size.
Lattice Constants, Structure, and Crystal Size of Nanocomposites LiOH/Activated Carbon and Rough Bamboo with Mass Variation Yulia Febrina; Darvina, Yenni
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.v2i1.44

Abstract

Energy development is needed in everyday life, one of which is electrical energy. Batteries are reliable electrical energy in the operation of portable electronic devices. Batteries that are often used are lithium batteries. Lithium batteries have the ability to charge quickly, last long and have high energy power. The reality is that batteries often overheat, affecting the work of the battery. Efforts to improve the performance of lithium batteries are to improve the quality of the anode material. This study aims to determine the lattice constant, structure, and crystal size of carbon, activated carbon, LiOH and variations of LiOH nanocomposite/ rough bamboo activated carbon. This research uses the sol gel method and is characterized using XRD. The mass variations used are 40%: 60%, 50% : 50%, 60% :40%. Carbon has a cubic crystal structure, crystal size of 103 nm. Peak addition occurs on activated carbon because it undergoes an activation process. Activated carbon has a hexagonal crystal structure, smaller crystal size than carbon which 25 nm - 62 nm. LiOH has a tetragonal crystal structure, crystal size 81 nm - 108 nm. The LiOH phase generally has a tetragonal crystal structure, and the carbon phase has a rhombohedral crystal structure. In the 40%: 60% variation has the smallest crystal size of 23 nm - 42 nm, because the addition of activated carbon is more than LiOH so that it affects the crystal size. If the addition of activated carbon is more than LiOH, the crystal size will be smaller.
Effect of Variations in Mass Composition of TiO2/Activated Carbon Cassava Peel on Crystal Structure and Size Fauziyah, Faadhilah; Darvina, Yenni; Ratnawulan, Ratnawulan; Gusnedi, Gusnedi
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.v2i1.45

Abstract

A battery is a tool used to store electrical energy to obtain electricity so that it can be used to power remotes, cellphones, laptops, cameras and other electronic items. The working indicator of a battery is capacity, its electrochemical cycling capability depends on the anode material. In general, battery anodes are made using graphite. However, graphite has limitations, namely that it can easily cause short circuits. Because graphite has limitations, a replacement for graphite from TiO2 nanocomposites with activated carbon will be made. Nanocomposites are new materials that are formed by combining two or more compounds to produce new properties and have nanoscale dimensions. TiO2 is used because it can reduce short cycles, has good stability, high current density and can increase battery performance capacity. Activated carbon is used to expand the surface of the material to obtain a large capacitance. The activated carbon used in this article is cassava peel from unused waste in order to reduce environmental pollution and increase the economic value of the waste. The aim of this research is to produce TiO2/Activated Carbon nanocomposites to test their crystal structure and size using XRD. TiO2/Activated carbon nanocomposites were obtained using the sol-gel method. Variations in the mass composition of TiO2/Activated Carbon used are 40%:60%, 50%;50%, and 60%:40%. Based on the tests that have been carried out, the smallest crystal size was obtained with a variation of 40%:60%, namely 58.4 nm with a Tetragonal structure for TiO2 while Cubic and Rhombohedral for carbon.
Seismotectonic Analysis and Seismic Potensial of The Sumatra Region Using The Guttenberg-Richter Method Yusrila, Yoga; Syafriani, Syafriani; Hamdi, Hamdi; Dwiridal, Letmi
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.v2i1.46

Abstract

Sumatera is one of the most seismically active regions in Indonesia. This is due to the presence of subduction zones and active faults that influence the plate tectonic activity of the region, resulting in many earthquake events that cause damage and loss. One of the efforts to mitigate earthquake disasters is the analysis of seismotectonic parameters, which are indicated by the a-value and b-value of the Gutenberg-Richter equation in the earthquake frequency-magnitude relationship. Low seismotectonic parameters (a-value) and (b-value) can be interpreted as low seismic activity and high local rock stress conditions, and vice versa high (a-value) and (b- value). In this study, the analysis was performed spatially and temporally from the National Earthquake Information Center United States Geological Survey (NEISUSGS) earthquake catalogue. The data obtained in the form of longitude, latitude, depth, magnitude, time and location of the earthquake event, the data are limited to M ≥ 4.0Mw and Depth ≤ 350KM in the Sumatera region with the boundaries of 6030'LU-6°30'LS and 94BT-106°BT for the period 1990-2022. Based on the estimation results of the Guttenberg-Richter method in ZMAP v6 software, the b-value is 0.92-1.04 and the a-value is 7.42-7.97, with a return period of 6.5 Mw earthquakes generally ranging from 5-25 years.
Mapping the Peak Ground Acceleration Value and Seismic Intensity in Pesisir South District Area using The Empirical Formulation of SI and Midorikawa Fauzi, Muhammad Aulia; Syafriani, Syafriani
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.v2i1.47

Abstract

The South Pesisir is an area that is prone to earthquakes, because it is in a zone that is traversed by the Sumatran fault, subduction zone and Mentawai fault. The 3 earthquake zones are areas that have an active level of seismicity from which the maximum ground acceleration value and earthquake intensity can be calculated. This research aims to determine and map the peak ground acceleration and seismic intensity values ​​to support development planning and spatial planning in the South Pesisir District area.This type of research is descriptive research, namely by collecting earthquake catalog data sourced from the USGS (United States Geological Survey) in the period 1973-2023 with coordinates -2.35°S – -1.04°N and 99.32°E – 101.27°E . The magnitude used is M ≥ 5 SR and a maximum depth of 300 Km. The method used in processing the peak ground acceleration data is the empirical formulation of Si and Midorikawa attenuation, then the peak ground acceleration and seismic intensity data output is displayed with ArcGis 10.8 software.The results obtained from calculating the higgest peak ground acceleration were in Lengayang District, Air Pura District, Pancung Soal District, and Basa IV Balai Tapan District with a value of 225.53 – 526.57 gal, while the lowest ground acceleration value was in Koto XI Tarusan District , Bayang District, North Bayang District, and Silaut District with a value of 16.15 – 27.91 gal. Meanwhile, the highest seismic intensity is in Lengayang District VIII MMI and the smallest seismic intensity is in Bayang District, North Bayang District, and Silaut District, namely IV MMI.
Effect of Tetraethoxysilane Addition to Coconut Coir Ash Nanosilica on Morphology and Particle Size of SiO2-TiO2 Nanocomposite Triana Dwi Restika; Ratnawulan, Ratnawulan
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.v2i1.48

Abstract

Nanotechnology is not possible without nano-sized materials. Nanomaterials can be used to produce composites that can be used in various fields, including in industry as fabric coating materials by providing certain properties to fabrics, one of which is water repellent properties. By adjusting the shape and size of the microscopic elements that comprise the nanocomposite, these water-repellent characteristics may be changed, changing the surface morphology, and interacting with the particles through the incorporation of two or more materials. Therefore, the goal of this research is to ascertain how the effect of tetraethoxysilane as a co-precussor SiO2 and as coupling agent on the SiO2-TiO2 nanocomposite layer. This type of research is experimental. Starting with the grinding of coconut fiber ash using HEM-E3D, the experiment continued with the extraction of silica using the sol-gel method and checking its composition with XRF. Next, the prepared nanocomposites were applied to the fabric. Furthermore, the nanocomposites were characterized by SEM and contact angle testing was conducted. The results of this study show that nanocomposites have better properties than their constituent particles. With the variation of adding 7 milliliters of tetraethoxysilane, the smallest particle size reaches 51 nm, and produces the best contact angle of 148°.

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