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Andi Syam Rizal
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INDONESIA
Jurnal Fisika dan Terapannya
Published by Universitas Islam Negeri Alauddin Makassar
ISSN : 23021497     EISSN : 27152774     DOI : -
Core Subject : Science,
Physics
Jurnal Fisika dan Terapannya (JFT) adalah jurnal fisika yang diterbitkan oleh Jurusan Fisika, Fakultas Sains dan Teknologi, Universitas Islam Negeri Alauddin, Makassar. Jurnal ini diterbitkan dua kali setahun pada bulan Juni dan Desember. Jurnal ini mencakup artikel penelitian dalam semua aspek fisika dan terapannya. Jurnal ini pertama kali diterbitkan pada bulan Desember 2014 dan secara online di tahun 2019. Artikel hasil penelitian dalam jurnal ini berkaitan dengan fisika yang meliputi adalah fisika teori, fisika material, geofisika, fisika kesehatan, fisika instrumentasi, fisika komputasi, dan astrofisika.
Arjuna Subject : Fisika dan Astronomi - Fisika dan Astronomi (Lain-Lain)
Articles 191 Documents
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Analisis Statistik Frekuensi Kejadian Gempabumi Menurut Sistem Kalender Qomariyah Hardiyanto, Sebastian; Rizky Muhammad Rahman
JFT : Jurnal Fisika dan Terapannya Vol 10 No 2 (2023): DESEMBER
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v10i2.32373

Abstract

Indonesia is in three active tectonic plates junction which causes tectonic activity in Indonesia to be high. The statistical method is often to be used by researchers in examining the relationship of earthquake’s frequencies with the other related parameters. In this study, the author tries to link the frequency of earthquakes that occurred in the Hijriy calendar system for the aim of finding a correlation between Islamic literature and earthquake natural disasters. Gregorian calendar is basically different from Hijriy calendar system. For this reason, various parameters of almanac and astronomy such as Julian Day, Sun Declination, Hour Angle and etc are calculated to determine the deadline of changing days on the Hijriy calender (Maghrib time) for correcting origin time from Gregorian to Hijriy calendar. The data used in this study was earthquake data for Indonesian region which is located between 6º N - 11º S and 95º - 141º E. Data was taken from the USGS site from January 1900 to October 2019 with magnitude ≥ 5 Richter. The results of these mathematical calculations concluded that the smallest earthquake’s frequency occurred on al-Jumu'ah (Friday) during the period of 1900 - 2019.
Studi Klasifikasi Jenis Tanah Dan Analisis Kecepatan Gelombang Geser Menggunakan Metode Inversi HVSR Di Kota Serang, Banten Sandy Tri Gustono; Muhammad Bintang Nugroho; Bambang Sunardi; Khairina Fauzi
JFT : Jurnal Fisika dan Terapannya Vol 10 No 2 (2023): DESEMBER
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v10i2.34733

Abstract

Serang City is a city that is prone to earthquakes. To minimize the disaster impact, the identification of dynamic and local soil conditions is needed. One of the methods that can be used is microtremor. Microtremor measurements have been carried out by the BMKG’s Seismotek Team in all areas of Serang City. Furthermore, the microtremor data was processed using the Horizontal to Vertical Spectral Ratio (HVSR) method to analyze the predominant frequency curve and value. Then the inversion method is applied to the results to obtain the model of the shear wave velocity (Vs) values. The results of modeling are then used to calculate the distribution of Vs30 values and classification of soil types and also modeled in 3-D to identify sediment thickness in Serang City. Microtremor data processing shows that the predominant frequency values in Serang City vary. The predominant frequency value ranges from 0,57 to 14,27 Hz. Then the results of the HVSR inversion obtained Vs30 in Serang City around 190 – 1400 m/s. Based on the soil classification by SNI 1726:2019, the type of soil varies from soft soil (SE), medium soil (SD), hard soil, and soft rock (SC), and there is one 1 data with rock soil classification (SB). The value of the Vs tends to be low in the north and east areas and increases further in the south and west area.
Penentuan Nilai Koefisien Restitusi Kelereng Kaca menggunakan Metode Pencitraan Jeda Waktu Sederhana Mahendra Kusuma Nugraha; Ernawatil Gani; Berton Maruli Siahaan; Afrioni Roma Rio
JFT : Jurnal Fisika dan Terapannya Vol 10 No 2 (2023): DESEMBER
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v10i2.36479

Abstract

Time-lapse imaging has been performed to observe the physical phenomena of imperfect elastic collisions between a glass marble and a tiled floor surface. The glass marble is dropped at a certain height until it hits the floor and experiences repeated rebounds. The event was recorded using the Infinix® Hot S3 smartphone device camera with a shutter speed of 30 frames per second. Analysis of time lapse photography is then carried out using the frame splitting method which is then observed visually to determine the height of each reflection that occurs. The results of the analysis and measurement of the maximum height for the initial state, the first bounce state and the second bounce state are respectively: 15.7 cm, 13.65 cm and 11.45 cm. The coefficient of restitution of glass marbles—based on the data obtained—at the initial maximum height ( towards the first reflection ( ) is ± 0.93242 and the first reflection ( ) towards the second reflection ( ) is equal to. ±0.91587. These results prove that the interaction that occurs is an imperfect elastic collision interaction due to . Keywords: marble, maximum height, restiution coefficient, time-lapse imaging.
Efektifitas Pengujian Kualitas Minyak Goreng Berdasarkan Indeks Bias: The Effectiveness of Testing the Quality of Cooking Oil Based on the Refractive Index Rejeki, Herlina Putri Rejeki; Hasna Adiba; Bayu Setiaji
JFT : Jurnal Fisika dan Terapannya Vol 10 No 2 (2023): DESEMBER
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v10i2.38299

Abstract

The refractive index of a solution is a very important characteristic parameter and several related parameters such as temperature, concentration, etc., can be estimated from it. The index of refraction of a substance is a measure of the speed of light in liquid compared to when in air. Refractive index is one of the parameters used to determine the quality of cooking oil. This study aims to determine the value of the refractive index of packaged cooking oil and bulk cooking oil, to compare the quality of packaged cooking oil and bulk cooking oil with the parameter of refractive index and to determine the effectiveness of testing the quality of cooking oil using the refractive index. The method used in this research is the experimental method, namely the refraction method using a parallel plan. From the experiment, it was found that the refractive index of packaged cooking oil is greater than that of bulk cooking oil. The refractive index of packaged cooking oil is 1,483 ± 0,044; while in bulk cooking oil 1,379 ± 0,024. This shows that the quality of packaged cooking oil is better than the quality of bulk cooking oil. The results obtained show that the use of the refractive index as a measure of the quality of cooking oil is considered effective. Keywords: Bulk Oil, Effectiveness, Packaged Oil, Quality, Refractive Index.
Analisis Perbedaan Gelombang Bunyi Pada Air dengan Software "Frequency Counter" Vania Yoni Fahmala; Salma Butsainah Salsabila; Khafidh Nur Aziz
JFT : Jurnal Fisika dan Terapannya Vol 11 No 1 (2024): JUNI
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v11i1.38735

Abstract

The process of learning physics can be in the form of conducting a research or experiment so that the results will become a new understanding concept contained therein. The use of the experimental method is intended to be able to observe directly various kinds of phenomena that occur in physics. The purpose of this study is to observe the difference in sound from each glass filled with water with a different volume, to analyze the frequency and period, and to describe the phenomena that occur in experiments with the help of ''frequency counter'' software. This experiment was carried out by filling three glasses with water of different volumes and hitting one side of the glass using a weight attached to a support with a rope. Simultaneously operate the ''frequency counter'' software to determine the difference in frequency of each glass. The research results obtained, the three glasses produce sounds that have different frequencies and periods, namely for the first glass (1758.21 Hz); (0.73672 m/s), second glass (2158.35 Hz); (0.45727 m/s), third glass (2170.69 Hz); (0.39740 m/s). Also, the phenomenon that occurs is diffraction (bending).
Analisis Pengaruh Tegangan dan Hambatan Terhadap Kuat Arus dengan Menggunkan Phet Simulation hilma; Malik, Adam
JFT : Jurnal Fisika dan Terapannya Vol 10 No 2 (2023): DESEMBER
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v10i2.39275

Abstract

In an increasingly modern era, increasingly advanced technology makes it very easy for the world of education, one of which is when carrying out practicum activities. so that practicum activities can be more flexible and can avoid work accidents. Practicum experiments, of course, vary, including resistors and incandescent lamps. The practicum aims to analyze the effect of voltage and resistance on the amount of current generated. The method used in this practicum is a quantitative method by conducting experiments or experiments with the Phet Simulation virtual lab. The results obtained from this practicum, the effect of voltage on current strength, the current strength will be greater when the voltage is increased, which means that the relationship between the two is directly proportional. While the influence of resistance, the greater the resistance given, the smaller the resulting current will be. This means that the relationship between resistance and current strength is inversely proportional.
Pengaruh Penambahan Semen Portland Terhadap Sifat Mekanik Geopolimer Berbasis Fly Ash Muin, Nurfajriani; Subaer; Nurhayati
JFT : Jurnal Fisika dan Terapannya Vol 10 No 2 (2023): DESEMBER
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v10i2.40262

Abstract

This study is a pure experimental research aimed at investigating the influence of adding portland cement on the mechanical properties of fly ash-based geopolymers. The composites were synthesized using fly ash as the base material, along with portland cement and alkali activation. Four compositions of samples were prepared with varying additions of portland cement at 0%, 20%, 40%, and 60%. The samples were then cured at 70°C for 2 hours and subsequently stored in an open space for 28 days. The crystal structure of the samples was analyzed using X-Ray Diffraction (XRD). Fourier Transform Infrared (FTIR) was used to examine the functional groups in the samples. Density and porosity testing were conducted using Archimedes' principle. Meanwhile, the mechanical properties of the samples were tested for compressive and flexural strength. The results of the XRD analysis showed the presence of quartz (SiO2) crystal peaks, along with other phases formed, including Calcium Oxide, Calcium Aluminum Silicate, Sodium Aluminum Silicate, Iron Oxide, Calcium Peroxide, and Aluminum Iron Oxide. The FTIR analysis of the composite functional groups indicated that there were no significant shifts in the absorption bands' wave numbers (cm-1) for each composition variation. The test results for density, porosity, and mechanical properties of the samples demonstrated a decrease with increasing additions of portland cement. The most optimal formulation was the geopolymers without the addition of portland cement (G-PCC 0%), which exhibited the highest compressive strength and relatively higher flexural strength.
Pengaruh Penurunan Nilai Kadar Abu Terhadap Nilai Kadar Zat Menguap Pada Briket Kulit Jengkol: The Effect of Decreasing Ash Content Value on Vaporized Substance Content Value of Jengkol Skin Briquettes Fazira, Natasya Aulia; Masthura; Ety Jumiati
JFT : Jurnal Fisika dan Terapannya Vol 10 No 2 (2023): DESEMBER
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The purpose of this research is to make briquettes of jengkol skin waste using sago starch adhesive so that it is known to reduce the value of ash content to the value of volatile matter content. The ratio of jengkol skin waste charcoal to sago starch glue used in this study ranged from sample A 65:35, B 70:30, C 75:25, D 80:20. The concentration of ash and volatile chemicals were among the variables analyzed. Sample D, containing 80% jengkol skin charcoal and 20% sago adhesive, performed best in terms of ash content (5.99%) and volatile matter content (4.03%) when tested as a charcoal briquette composition. SNI 01-6235-2000 which is the standard for wood charcoal briquettes has been fulfilled by the briquettes. Keywords: Jengkol Skin, Charcoal Briquettes, and Sago Flour.
Pengaruh Komposisi Penambahan Limbah Plastik LDPE dan Serbuk Sabut Kelapa Terhadap Nilai Densitas dan Kuat Tekan Batako Ringan Safina, Nurul; Ety Jumiati; Miftahul Husnah
JFT : Jurnal Fisika dan Terapannya Vol 10 No 2 (2023): DESEMBER
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v10i2.41494

Abstract

Research has been carried out which aims to determine the characteristics of lightweight bricks from LDPE plastic waste and coconut fiber powder produced. Variations in the composition of LDPE plastic and coconut fiber powder are 5%:35%, 10%:30%, and 15%:25% with a water cement factor (FAS) value of 0.5 using a hot press machine with a room temperature of 32°C. There is an effect of adding LDPE plastic waste and coconut fiber powder to lightweight bricks. The results of testing brick samples with a variation of 5%:35% produced a density value of 1,316 kg/m3 and produced a compressive strength value of 6.16 MPa which is included in the IA quality level and can be applied as a structural brick for walls exposed to the environment (outdoor). and others who do not bear the heavy loads specified by the SNI 8640:2018 standard..
Analisis Ketebalan Potensi Bahan Galian dengan Menggunakan Metode Geolistrik di Kelurahan Togafo, Kota Ternate Syarifullah Bundang; Said Hi Abbas; Minarti
JFT : Jurnal Fisika dan Terapannya Vol 10 No 2 (2023): DESEMBER
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v10i2.41649

Abstract

The volcanic activity of Mount Gamalama in Ternate City greatly affects the geological conditions, especially the rock types in Togafo Village. There are outcrops of economically valuable minerals such as volcanic breccia deposits with a thickness of up to 5.8 m, but the vertical continuity of this layer is still unknown, so further research is needed. Geoelectric methods can be used to determine subsurface geological conditions. This research aims to analyze the thickness of potential volcanic breccia excavation material in Togafo Village, Ternate City. Some of the data used such as sounding geoelectrical measurements for 2 tracks using Schlumberger configuration, drilling using hand auger, and megascopic description of rock outcrops. The results show there are 2 layers in the subsurface, where the geoelectrical data shows that layer 1 is interpreted as a layer of sandy silt rock with a thickness of 0.6895 m at a depth of 0 - 0.6895 m with a resistivity value between 8.11 - 18.3 Ωm, and layer 2 is interpreted as a layer of volcanic breccia rock at a depth of 0.6895 - 25.4 m with a thickness of 24.7105 m with a resistivity value of 80 - 302 Ωm. This is also in accordance with the results of shallow drilling which shows the thickness of the top soil in the form of sandy silt is 0.45 m. So, it can be concluded that the average thickness of potential excavation material in the form of volcanic breccia rock layers is 24.7105 m.

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