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PROGRAM STUDI FISIKA FAKULTAS MATEMATIKA ILMU PENGETAHUAN ALAM DAN KEBUMIAN UNIVERSITAS NEGERI MANADO Jl. Kampus Unima, Kel. Koya, Kec. Tondano Selatan, Minahasa, Indonesia
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Jurnal FisTa : Fisika dan Terapannya
Published by Universitas Negeri Manado
ISSN : -     EISSN : 27471691     DOI : https://doi.org/10.53682/fista.xxxx.xxx
Core Subject : Science, Engineering,
Astronomy Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics
Jurnal FisTa : Fisika dan Terapannya merupakan salah satu Jurnal Nasional dalam bidang Ilmu Fisika dan Terapannya di bawah pengelolaan Program Studi Fisika Fakultas Matematika Ilmu Pengetahuan Alam dan Kebumian, Universitas Negeri Manado. Jurnal FisTa : Fisika dan Terapannya memiliki nomor eISSN 2747-1691. Jurnal FisTa : Fisika dan Terapannya diterbitkan pertama kali pada tahun 2020. Hal ini dilakukan, untuk merespon para mahasiswa, dosen dan juga peneliti di bidang Fisika dan Terapannya untuk dapat membagi hasil penelitiannya dalam bentuk artikel ilmiah. Ruang lingkup artikel dalam Jurnal FISTA Fisika dan Terapannya adalah Ilmu Fisika dan Terapannya, diantaranya terkait dengan topik : Fisika Material; Fisika Teori; Fisika Material Lunak; Fisika Komputasi; Fisika Instrumentasi; Astronomi; Fisika Koloid; Geofisika; Elektronika: Fisika terapan terkait lainnya.
Arjuna Subject : Fisika dan Astronomi - Fisika dan Astronomi (Lain-Lain)
Articles 8 Documents
 1 
Search results for , issue "Vol 6 No 2 (2025): OKTOBER" : 8 Documents clear
Pemanfaatan Karbon Aktif dari Limbah Kulit Pisang Kepok (Musa Paradisiaca L) sebagai Elektroda Superkapasitor Kapantow, Khariezmathika Ester; Rampengan, Alfrie Musa; Tumimomor, Farly Reynol; Taunaumang, Heindrich; Umboh, Sixtus Iwan
Jurnal FisTa Fisika dan Terapannya Vol 6 No 2 (2025): OKTOBER
Publisher : Fakultas Matematika Ilmu Pengetahuan Alam dan Kebumian, Universitas Negeri Manado

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Abstract

In recent years, attention to renewable energy has increased, especially in electrical energy. One of the emerging technologies in supporting electrical energy storage is supercapacitors. This study aims to determine the effect of variations in the concentration of KOH solution on the current and voltage characteristics produced by supercapacitor electrodes made from activated carbon from kepok banana peel waste (Musa Paradisiaca L). By using dehydration method 80°C, carbonization at 400°C, chemical activation with 5M, 6M, and 7M KOH solution, and physical activation at 750°C. The results showed that the concentration of KOH activator from 5M, 6M, to 7M increased the electric voltage to 0.641 V, 1.078 V, and 1.448 V and electric current to 10.3 mA, 11.6 mA, and 28.5 mA, respectively. However, the density and conductivity values showed different patterns, with density values of 1.2446 A/
Pemanfaatan Karbon Aktif dari Cangkang Kemiri sebagai Elektroda Superkapasitor Kawulur, Kezia; Taunaumang, Heindrich; Umboh, Sixtus Iwan; Bujung, Cyrke Adfie Netty; Kamaruddin
Jurnal FisTa Fisika dan Terapannya Vol 6 No 2 (2025): OKTOBER
Publisher : Fakultas Matematika Ilmu Pengetahuan Alam dan Kebumian, Universitas Negeri Manado

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Abstract

The energy crisis is one of the major challenges facing the world today, triggered by over-reliance on fossil energy sources, rapid population growth, and the threat of climate change. One technology that attracts attention is supercapacitors. The purpose of this study was to determine the effect of carbon activation using KOH with varying concentrations on electrical conductivity as a supercapacitor electrode. By using dehydration method, carbonization at 500℃. The chemical activation process is treated with variations in KOH concentration of 6M, 7M, 8M with physical activation in a furnace at 750℃. The test results of conductivity and density values show that the comparison with the increase in KOH concentration results in an increase in conductivity of 0.1012 S/m, 0.1694 S/m, and 0.3282 S/m. Accompanied by a decrease in density of 9.8810 A/
Pengaruh Proses Pembuatan Terhadap Karakteristik Minyak Kelapa Lestari, Endang Putri; Gugule, Sanusi; Fatimah, Feti; Maanari, Chaleb
Jurnal FisTa Fisika dan Terapannya Vol 6 No 2 (2025): OKTOBER
Publisher : Fakultas Matematika Ilmu Pengetahuan Alam dan Kebumian, Universitas Negeri Manado

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Abstract

Coconut oil is one of the vegetable oils widely used in the food, cosmetic, and pharmaceutical industries due to its high content of saturated fatty acids, particularly lauric acid. This study was conducted on the effect of coconut oil processing methods on the characteristics of the resulting coconut oil. Three processing methods were applied: non-heating, fermentation, and direct heating. A transesterification step was carried out to determine the fatty acid profile and its derivatives. The characterization of coconut oil compounds included measurements of density, acid value, peroxide value, and ester value, as well as analysis of fatty acid compounds using Gas Chromatography-Mass Spectrometry (GC-MS). The results showed that the best method for producing coconut oil was the non-heating process, with the following physicochemical properties: yield of 13.5%, acid value of 0.20 mg KOH/g, peroxide value of 2.00 meq/kg, and ester value of 223.28 mg KOH/g. The main components identified from the transesterified coconut oil were dodecanoic acid methyl ester (methyl laurate), methyl tetradecanoate, and hexadecanoic acid methyl ester.
Identifikasi Mineral Batuan Mata Air Panas Bukit Kasih Kanonang Menggunakan SEM-EDX dan FTIR Sorongan, Christina; Donny Royke Wenas; Jeilen Gabriela Nikita Nusa; Heindrich Taunaumang; Vistarani Arini Tiwow
Jurnal FisTa Fisika dan Terapannya Vol 6 No 2 (2025): OKTOBER
Publisher : Fakultas Matematika Ilmu Pengetahuan Alam dan Kebumian, Universitas Negeri Manado

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Abstract

North Sulawesi has considerable geothermal potential as evidenced by the emergence of several types of geothermal manifestations, one of which is located in Kanonang village, precisely on the hill of Kasih Kanonang. The purpose of this research is to determine the rock structure and type of rock contained in the rock in the manifestation area located on the hill of love kanonang. The method to be used in this research is to analyze in the laboratory using SEM-EDX tools and FTIR tools. The results showed that the mineral content and mineral types of geothermal manifestations of hot springs in kanonang love hill have 3 elements namely Oxygen, Silica, and Aluminum with a percentage content of O 66.60%, Si 31.25%, and Al 0.73%.
Evaluasi Akurasi Metode Arus Cabang Melalui Pendekatan Teoritis, Simulasi EWB, dan Pengukuran Eksperimental Duri', Ariyen; Pineng, Martina; Martati, Martati
Jurnal FisTa Fisika dan Terapannya Vol 6 No 2 (2025): OKTOBER
Publisher : Fakultas Matematika Ilmu Pengetahuan Alam dan Kebumian, Universitas Negeri Manado

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Abstract

This study aims to evaluate the accuracy of the branch current analysis method through three approaches: theoretical calculation, simulation using Electronics Workbench (EWB), and experimental measurement using a digital multimeter. The test circuit consists of two 10 V DC voltage sources and three resistors (R1 = 2200 Ω, R2 = 2200 Ω, R3 = 1000 Ω) forming two loops with three branch currents (I1, I2, I3). The theoretical analysis was performed by applying Kirchhoff’s Current Law (KCL) and Kirchhoff’s Voltage Law (KVL), while the simulation was conducted in EWB software with the same configuration. Direct measurements were obtained by connecting the multimeter in series with each branch. The results show that the simulated current values closely match the theoretical calculations, with a maximum relative error of 0.0084% and an accuracy of 99%. Meanwhile, the experimental measurements exhibit larger deviations compared to the simulation, ranging from 1% to 2 %, with accuracies between 97% and 98%. Overall, the study demonstrates that the branch current method produces consistent results between theoretical calculations and simulations, while the experimental measurements show deviations that remain within acceptable limits due to component tolerances, connection resistance, and instrument accuracy.
Desain Antena Mikrostrip Segitiga Sama Sisi sebagai Pendeteksi Partial Discharge Massang Lumembang, Megastin; Pongsapan, Fajar Pratama
Jurnal FisTa Fisika dan Terapannya Vol 6 No 2 (2025): OKTOBER
Publisher : Fakultas Matematika Ilmu Pengetahuan Alam dan Kebumian, Universitas Negeri Manado

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Abstract

Partial discharge (PD) is a phenomenon that can degrade the insulation system of high-voltage equipment. Early detection of PD requires sensors with high sensitivity in the Ultra High Frequency (UHF) range. This study proposes an equilateral triangular microstrip antenna optimized to operate at 2.45 GHz using an FR-4 substrate (εr = 4.4, thickness 1.6 mm). The side length of the triangular patch was calculated to be 42 mm to achieve resonance at the target frequency. Analysis results indicate that the antenna exhibits a Return Loss of less than -10 dB and a VSWR of less than 2 at the operating frequency, fulfilling the requirements for PD detection applications. This design contributes to the development of compact and cost-effective UHF sensors for condition monitoring of high-voltage equipment, and offers an alternative approach to the development of resonant antennas at 2.45 GHz for microstrip antenna-based PD detection systems.
Karakterisasi Elastisitas Karet Alam dari Castilla elastica melalui Uji Tarik Beban Bertahap Ely , Sufilman; Akyuwen, Frandy; Kaloari, Ruth Meisye
Jurnal FisTa Fisika dan Terapannya Vol 6 No 2 (2025): OKTOBER
Publisher : Fakultas Matematika Ilmu Pengetahuan Alam dan Kebumian, Universitas Negeri Manado

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Abstract

This study aims to test the elasticity properties and calculate the elastic modulus (Young's modulus) of natural rubber produced by Castilla elastica trees that grow naturally in Hila Village, Ambon Island. This plant is an alternative source of rubber that has not been widely utilized in Indonesia. The research was conducted using quantitative experimental methods in a laboratory where sap from the Castilla elastica tree was tapped, dried, and formed into uniform-sized rubber strips. Elasticity tests were carried out by applying gradual loads to each sample and measuring the increase in length due to strain. The results showed that rubber from Castilla elastica has high tensile strength but a relatively low elastic modulus, ranging from 5,416 to 16,263 N/m². This value is significantly lower than the elastic modulus of natural rubber from Hevea brasiliensis, which typically ranges between 0.32–0.42 MPa. The decrease in modulus with increasing load indicates the non-linear elastic behavior of the material. These results suggest that rubber derived from Castilla elastica is soft and has potential applications in lightweight elastic products. These characteristics indicate its potential utilization as a base material for the fabrication of lightweight elastomeric products such as flexible protective membranes, elastic adhesive coatings, soft sleeves or gaskets, and lightweight vibration-damping pads in mechanical systems.
Tinjauan Tentang Potensi Suseptibilitas Magnetik dalam Monitoring Polusi Sedimen Sungai Pangkey, Mipantria Gabriela; Virgin, Meyke; Sayenne Givenshe Pungus; Derek, Glladyvio; Lucas, Bill Ryan; Loding, Intan Eka Audrey; Tiwow, Vistarani Arini
Jurnal FisTa Fisika dan Terapannya Vol 6 No 2 (2025): OKTOBER
Publisher : Fakultas Matematika Ilmu Pengetahuan Alam dan Kebumian, Universitas Negeri Manado

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Abstract

A literature review of the magnetic mineral properties of river sediments using magnetic susceptibility parameters was conducted to assess their potential for pollution monitoring. This study analyzed 28 articles published in journals/proceedings related to the topic of magnetic susceptibility of river sediments. Based on the results of the literature review, the magnetic susceptibility values ​​of river sediments show a high range. This means that with such (high) susceptibility values, river sediments are ferrimagnetic. Information obtained from magnetic susceptibility data of river sediments indicates a high Fe content. We also describe that there are frequency-dependent magnetic susceptibility (χFD) values ​​of more than 2 % in river sediments containing superparamagnetic grains (fine grains). River sediments with high susceptibility values and high Fe content can indicate that the river has been polluted.

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