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All Journal Teknosains: Media Informasi Sains dan Teknologi Techno: Jurnal Penelitian SITEKIN: Jurnal Sains, Teknologi dan Industri JOURNAL ONLINE OF PHYSICS JPF (Jurnal Pendidikan Fisika) Universitas Islam Negeri Alauddin Makassar Jurnal Fisika dan Terapannya
Sahara Sahara
UIN Alauddin Makassar
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Industrial & Manufacturing Engineering Physics Other

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PENGARUH TEGANGAN TABUNG (kV) PADA PEMERIKSAAN THORAX TERHADAP KUALITAS CITRA RADIOGRAFI DI BALAI BESAR KESEHATAN PARU MASYARAKAT MAKASSAR Fitriani Fitriani; Sri Zelviani; Sahara Sahara
JFT : Jurnal Fisika dan Terapannya Vol 7 No 2 (2020): DESEMBER
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v7i2.18067

Abstract

This study aims to determine the effect of high voltage usage and standards on the quality of radiographic imagery produced on X-ray aircraft. Data retrieval was obtained by conducting testing in the Radiology Installation room of the Makassar Public Lung Health Center by using an X-ray aircraft of thosiba brand type with drx-1824B model unit. The result obtained is the voltage of the tube gives an influence on the quality of radiography imagery where for the use of standard tube voltage provides good radiographic imagery quality results with a graph reading histogram voltage of 50 kV with a distance of 100 cm and a time of 10 mAs with a black background image starting at the position of 16 to 36 and the position of the object is 37 to 79 which is then able to provide information because the edges of the object and background can still be distinguished clearly and for the high voltage used the result is less tub because it can reduce the contrast value of objects and background is indistinguishable, this is seen in the histogram readings voltage of 90 kV and distance of 100 cm and the time of 10 mAs has a gradation of gray color that dominates compared to the black background whose position starts from 10 to 132 which can not provide information on the edge value between the background and the object phantom water because both seem to be fused so that it is indistinguishable and causes an inadequate image contrast Not good enough.
PEMANFAATAN JERAMI DAN BUAH LONTAR SEBAGAI SUBSTRAT MENGGUNAKAN TEKNOLOGI MICROBIAL FUEL CELL Basmanto Basmanto; Hernita Sapitriani; Nurfadhilah jusman; Sahara Sahara; Jasdar Agus
JFT : Jurnal Fisika dan Terapannya Vol 8 No 1 (2021): JUNI
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v8i1.21192

Abstract

The increasing energy consumption is not directly proportional to the availability of energy. This encourages the continued development of alternative energy sources to replace fossil energy sources.  In this research, a Microbial Fuel Cell (MFC) will be made as an alternative energy source that metabolism of bacteria to produce electrical energy.  Microbial Fuel Cell (MFC) is made by varying the type of substrate.  The type of substrate used is made of straw and borassus fruit extract. In this study, the MFC design uses a dual-chamber system consisting of an anode compartment and a cathode compartment. Analysis of the effect of substrate variations on MFC performance can be seen from the measurement data of current and voltage using a digital multimeter based on the length of time working with the addition of resistance and without resistance which is used to determine the power density value. The measurement results showed that the highest power density for straw substrate was obtained at 1st hour measurement, which a value of 770.1 mW/m2 for the addition of external resistance and 401.6 mW/m2 without external resistance.  Meanwhile, for the borassus fruit extract substrate, the highest power density was obtained at 29 hours of 594.1 mW/m2 using external resistance and 364.9 mW/m2 without external resistance. The resulting power density value is higher than previous studies so that the straw and borassus fruit extract substrate has a great potential to be used as a substrate in MFC technology.
PENGARUH PENAMBAHAN LIMBAH PLASTIK JENIS POLYETHYLENE TEREPHTHALATE, LOW DENSITY POLYETHYLENE DAN POLYPROPYLENE TERHADAP NILAI KUAT TEKAN DAN DAYA SERAP AIR PAVING BLOCK Dya Ayu Rahma Niar Rajab; Sahara Sahara; Ayusari Wahyuni
JFT : Jurnal Fisika dan Terapannya Vol 8 No 2 (2021): DESEMBER
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v8i2.23442

Abstract

The use of plastic as an additional material in the manufacture of paving blocks is an alternative to reduce the accumulation of plastic waste. The purpose of this study is to determine the effect of adding plastic to the compressive strength and water absorption of paving blocks and to determine the composition that can produce optimal compressive strength and water absorption values. The design used in this study consisted of 3 treatments, namely normal paving blocks or without additional plastic, paving blocks with the addition of one type of plastic each, and paving blocks with the addition of three types of plastic at once. The amount of plastic used is 0.4% of the mass of paving blocks, with a ratio of cement and sand used, namely 1: 3. The tests carried out are compressive strength tests and water absorption tests. The test results show that the maximum compressive strength is found in the addition of three types of plastic waste, each 33.3% of the total fiber, which is 19.84 MPa with an increase of 17% from normal paving blocks. The sample also has the lowest absorption value of 4.1% with an increase of 14% from normal paving blocks. The value above can meet SNI 03-0691-1989 quality B, which means it can be used for parking lots
Pengaruh Pemberian Gelombang Bunyi Jenis Murottal Terhadap Pertumbuhan Batang Dan Daun Pada Pembibitan Kacang Tanah (Arachis Hypogea) Zulfaniar; Hernawati; Sahara
JFT : Jurnal Fisika dan Terapannya Vol 10 No 1 (2023): JUNI
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v10i1.25502

Abstract

This study aims to determine the effect of murottal type sound waves on stem height, number of leaves and number of stalks on peanut plant growth. Using local peanut seeds with the addition of organic fertilizer, urea fertilizer and without the addition of other nutrients. The peanut seeds were treated with 4000 Hz murottal sound with different exposure times and without murottal sound exposure. Peanut seedlings were observed using a camera to obtain images and using measuring instruments to determine the growth of stems and leaves. The results showed that the difference in the effect of giving sound and without sounding could give a change in the average increase of 6 - 9 cm in stem height, the number of leaves experienced an average increase of 4 leaves while the change in the number of stalks experienced an increase of 1 stalk.
The Effect of Time and Dose from Gamma Irradiation (Cesium-137) on Protein Levels and Meat Color Index of Cork Fish (Channa Striata) Janna, Miftahul; Fuadi, Nurul; Jumardin, Jumardin; Sahara, Sahara; Isradianti, Dwi Febri; Hidayat, Serli Hatul
SITEKIN: Jurnal Sains, Teknologi dan Industri Vol 22, No 1 (2024): December 2024
Publisher : Fakultas Sains dan Teknologi Universitas Islam Negeri Sultan Syarif Kasim Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24014/sitekin.v22i1.25387

Abstract

The study aimed to determine the effect of time and dose of gamma-ray irradiation on protein levels and storability based on the red color index of cork fish (channa striata). The results showed that the longer the irradiation time and the larger the dose given, the higher the protein level and absorbance value produced. The method used was UV-Vis spectrophotometry to determine protein levels and Image-J software to see the shelf life based on the red colour index. The sample consisted of control, irradiated with irradiation time of 35 minutes (6 mGy), 40 minutes (7 mGy) and 45 minutes (8 mGy) and an irradiation distance of 150 cm. The protein levels at control time, which were recorded at 35, 40, and 45 minutes, were 0.138%, 0.187%, 0.276%, and 0.347%, respectively. These results suggest that there may be a correlation between time and protein levels. Further analysis may be needed to fully understand the implications of these findings. The percentage close to stable on the first day with percentages of 1.54%, 1.66%, 1.76%, 2.50%. Additionally, it seems that a higher dose of irradiation may also result in a higher protein content and absorbance value.Keywords: Cesium-137, Cork Fish, Irradiation, Protein, UV-Vis Spectrophotometer 
Ekstraksi Frekuensi dari Bunyi Alqurans dengan Metode Discrete Fourier Transform: Studi Kasus Bunyi QS. Al-Fatihah Kusmiran, Amirin; Andi Syam Rizal; Sahara; Ahmad Zarkasi; Kasturi Ramadani
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.v11i1.45386

Abstract

The Quran is a miracle received by the Prophet Muhammad. Alquran can use to reduce anxiety in patients with acute coronary syndrome, hemodialysis, schizophrenia, etc., when the sound retardation of this Qur'an, especially QS. Al-Fatihah. The physical properties of waves can be analyzed using the discrete Fourier transform method for frequency extraction. This method is scripted using the Python programming language. The results show that frequency in Qs. Al-Fatihah/1:1-7 are random in range 150 Hz – 800 Hz.Thus, the frequencies of the Quran, especially QS Al-Fatihah, are uneven waves that can cause harmonic vibrations against brain waves.
Kualitas Biobriket Variasi Komposisi Tempurung Kelapa, Kulit Kacang Tanah, dan Tinja Sapi sebagai Sumber Energi Alternatif Safitri, Aan; Sahara, Sahara; Jumardin, Jumardin
JFT : Jurnal Fisika dan Terapannya Vol 11 No 2 (2024): DESEMBER
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v11i2.53708

Abstract

Penelitian fokus pada pengujian biobriket dari komposisi arang tempurung kelapa, kulit kacang tanah, dan tinja sapi dengan perekat tepung kanji. Penelitian ini bertujuan untuk mengetahui kualitas briket yang meliputi parameter kerapatan, kadar air, kadar abu, dan nilai kalor berdasarkan standar SNI. Penelitian ini menggunakan metode karbonisasi untuk tempurung kelapa dan kulit kacang dan pada perlakuan bahan tinja sapi menggunakan metode tanpa karbonisasi. Hasil penelitian menunjukkan bahwa nilai kadar air, kadar abu dan nilai kalor optimal diperoleh pada sampel D masing-masing sebesar 3,5%, 1% dan 5483,26 kal/gram. Untuk pengujian nilai kerapatan briket dari rentang 0,58 gr/??3 sampai 0,77 gr/??3. Dari keseluruhan komposisi semuanya memenuhi standar SNI briket dengan sampel terbaik pada komposisi sampel D yang terdiri dari 45% tempurung kelapa, 30% kulit kacang tanah, 15% tinja sapi dan perekat sebanyak 10%.
Uji Kuat Tekan dan Kekerasan dengan Variasi Komposisi dan Ukuran Partikel pada Biobriket Tempurung Kelapa (Cocos Nucifera), Tongkol Jagung (Corn Cob) dan Kotoran Sapi Kalsum, Ummi; Sahara; Jumardin, Jumardin
JFT : Jurnal Fisika dan Terapannya Vol 12 No 1 (2025): Juni 2025
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v12i1.57733

Abstract

This study aims to examine the mechanical characteristics of briquettes made from a mixture of coconut shells, corn cobs, and cow dung with tapioca adhesive. Briquettes were tested based on their mechanical properties for density using a vernier caliper and for compressive strength and hardness using a Universal Testing Machine (UTM). Samples were made in different mixture compositions with particle sizes of 60 mesh and 100 mesh. The results showed that variations in particle size and material composition significantly affected the quality of biobriquettes. Biobriquettes with a particle size of 100 mesh have higher density, compressive strength, and hardness than 60 mesh particles. The material composition with a ratio of 44:44:12 produced the best characteristics with a density value of 0.94 g/cm³, compressive strength of 9.32 kg/cm², and hardness of 41.10 HB. This study proved that biobriquettes meet the criteria as an environmentally friendly alternative fuel and have the potential to reduce biomass waste while providing efficient renewable energy.
OPTIMIZATION OF BIO-BRIQUETTES AS AN ALTERNATIVE FUEL SOLUTION THROUGH THE COMBINATION OF COCOA FRUIT PEEL, PEEL OF BANANA (MUSA PARADISIACA L.) AND TAPIOCA FLOUR A, Indrawati.A; Hernawati, Hernawati; Broto, Prasepvianto Estu; Sahara, Sahara; Rani, Sefrilita Risqi Adikaning Rani
JOURNAL ONLINE OF PHYSICS Vol. 9 No. 2 (2024): JOP (Journal Online of Physics) Vol 9 No 2
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v9i2.32033

Abstract

Penelitian mengenai bio-briket berbahan dasar limbah kulit kakao, kulit pisang Musa Paradisiaca L., dan tepung tapioka dilakukan sebagai solusi bahan bakar alternatif pengganti bahan bakar fosil. Pada penelitian ini dibuat beberapa briket dengan variasi campuran yang bertujuan untuk mengetahui karakteristik dan perbandingan komposisi campuran kulit kakao, kulit pisang Musa Paradisiaca L., dan tepung tapioka sehingga diperoleh briket bioarang yang memenuhi standar Standar Nasional Indonesia (SNI) berdasarkan kualitas seperti kadar air, kadar abu, nilai kalor, kerapatan, dan lama pembakaran. Metode pembriketan yang digunakan adalah teknik pemadatan dengan menggunakan bahan baku padat. Bahan baku yang digunakan untuk pembuatan briket adalah kulit kakao kering, kulit pisang Musa Paradisiaca L., dan tepung tapioka yang digiling halus dengan cara digiling. Perbandingan sampel kulit kakao, kulit pisang Musa Paradisiaca L., dan tepung tapioka yang digunakan dalam penelitian ini adalah 70:20:10 (sampel A), 75:15:10 (sampel B), dan 80:10:10 (sampel C). Berdasarkan hasil penelitian dari ketiga variasi sampel tersebut, sampel B menunjukkan nilai yang paling optimal dibandingkan dengan sampel lainnya. Sampel B menunjukkan nilai kalor sebesar 2.814 kkal/g, massa jenis 0,55 g/cm³, kadar abu 14%, kadar air 8%, dan lama pembakaran 13 menit. Beberapa parameter yang diuji telah memenuhi standar SNI, khususnya kadar air dan kerapatan briket. Namun demikian, briket bioarang ini dinilai layak untuk digunakan sebagai bahan bakar alternatif.
Karakterisasi Sifat Fisis dan Mekanis Komposit Berbahan Sabut Lontar dalam Aplikasi Papan Partikel Syamsuddin, Sahara; Kusmiran, Amirin; Fajar, Fajar; Apriliah, Risky
JPF (Jurnal Pendidikan Fisika) Universitas Islam Negeri Alauddin Makassar Vol 12 No 1 (2024)
Publisher : Pendidikan Fisika UIN Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jpf.v12i1.45597

Abstract

This research used the natural fiber of the Palmyra fruits for composite particle manufacturing, and the physical and mechanical properties were studied on these composite particles. Raw material manufacturing uses the hand lay-up technique with a uniform volume fraction and random fiber in the composite. The presentations of the ratio composition of both fibers of palmyra fruits and epoxy resin are 75:25 for sample A, 70:30 for sample B, 65:35 for sample C, 60:40 for sample D, and 55:45 for sample E. This research shows that densities of the sample A to sample E are in range 0.47 g/cm3 to 0.60 g/cm3, and a sample A has the highest development thickness, with 72.61%, and the lowest is in sample C, with 33.11 %. Water content testing shows that samples A, B, C, and E have range 2.75 % to 7.52 %, and sample D is 17.30 %. For modulus of rapture (MOR), sample A has higher MOR than sample B, C, D, and E. Whereas sample D has lower MOR than the other samples. Sample C has the highest value for modulus of elasticity (MOE), 5526.47 kg/cm2. This sample's high modulus of elasticity correlates with the percentage of thickness development where the percentage of thickness development of sample C is lowest at 33.11%. The analysis results with AND or OR logic show that samples A, B, and D does not match SNI 03-2105-2006 standards while C and E samples match with SNI 03-2105-2006 standards. Thus, the three samples are not recommended for development. While C and E samples can be developed into particle board by reducing moisture content and improving elasticity properties.
Co-Authors A, Indrawati.A Abd. Munir HB Abd. Rasyid Syamsuri Abu Ammar Ahmad Zarkasi Alimuddin, Arni Amaliah, Fia Amirin Kusmiran Andi Syam Rizal Anita Purnamasari Apriliah, Risky Ashar, Muh. Askar Ayu Hardianti Mahmud Ayusari Wahyuni Ayusari Wahyuni Basmanto Basmanto Broto, Prasepvianto Estu Darwis, Arwin Dya Ayu Rahma Niar Rajab Fadhila, Rahayu Yuliastri Fajar Fajar Fitria Jasman Fitriani Fitriani Hasan, Hasniati Herianti, Herianti Hernawati Hernawati Hernawati Hernawati Hernita Sapitriani Hery Widijanto Hidayat, Serli Hatul I Gusti Bagus Wiksuana Ihsan Ihsan Ihsan Ihsan Ilham Maulana Ilyas, Mohamad Isradianti, Dwi Febri Jamhari Jamhari Janna, Miftahul Jasdar Agus jumardin jumardin Kasturi Ramadani Mentari, Eka Pratiwi Muh Sundi Safi’i Ahmad Muh. Said L Muh. Taufik Muhlis, Ahmad Marzuki Nur Afni Nurfadhilah jusman Nurhalimah Nurhalimah Nurul Fuadi Patunrengi, Iswadi Ibrahim Prihardjo Sanyoto RAHMANIAH RAHMANIAH Rahmayani, Rai Rani, Sefrilita Risqi Adikaning Rani Safitri, Aan Saiyidah, Hijrah Mustajabah Sophyan, Nur Fadhilah Syamsur, Nadia Nurafiah Topyana Topyana Ummi Kalsum Wahyuni, Ayusari Yoga Yuniadi Yuliamdani, Riska Yuliana Nengsih Zelviani, Sri Zulfaniar