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Zelviani, Sri
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Physics

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PENGARUH JENIS BAHAN BAKAR BIOBRIKET TERHADAP UNJUK KERJA PADA MINIATUR PEMBANGKIT LISTRIK TENAGA UAP Narti, Narti; Ihsan, Ihsan; Zelviani, Sri; Wahidah, Nurul; Abadi, Firdaus Alam
JFT : Jurnal Fisika dan Terapannya Vol 6 No 2 (2019): Desember
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (258.075 KB) | DOI: 10.24252/jft.v6i2.11743

Abstract

Research has been conducted to determine the effect of biobriquette fuel types on electric power generated in miniature steam power plants. This study uses four fuels, namely raw materials for coconut shell and wood, and biobriquette from coconut shell and wood. There are two parameters tested in this study, namely the burning time and evaporation of 2000 ml of distilled water and the electric power generated. Based on research that has been done it can be concluded that the type of fuel influences the amount of power produced. From the type of fuel obtained that the greater the calorific value of a fuel, the electric power produced will be greater as well. small heating value of around 3000 cal / g, the electric power produced is getting smaller, that is equal to 0.0021 watts.
KARAKTERISASI NANOSILIKA DARI ABU TERBANG (FLY ASH) PT. BOSOWA ENERGI JENEPONTO DENGAN MENGGUNAKAN METODE ULTRASONIC Desianti, Ika; Rahmaniah, Rahmaniah; Zelviani, Sri
JFT : Jurnal Fisika dan Terapannya Vol 5 No 2 (2018): Desember
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (591.395 KB) | DOI: 10.24252/jft.v5i2.10243

Abstract

This research aims at the process of making fly ash nanosilica using ultrasonic methods and to determine the characterization of nanosilica from fly ash. Many studies have shown that fly ash contains silica. The process of extracting silica from fly ash uses the reflux method extraction process. Meanwhile, the process of making silica nanoparticles uses ultrasonic methods. The ultrasonic method is a method for breaking particles by utilizing ultrasonic waves with a high frequency that is above 20 kHz. The resulting silica was divided into three with each different treatment, namely silica without sonication (TN), silica with sonication process for 60 minutes (N60) and for 120 minutes (N120). The silica each has a percentage of elements (%) ie 23.13%, 20.25% and 17.82%.
PENGARUH JENIS FLUIDA TERHADAP UNJUK KERJA MINIATUR PEMBANGKIT LISTRIK TENAGA UAP Wahidah, Nurul; Ihsan, Ihsan; Zelviani, Sri; Abadi, Firdaus Alam
JFT : Jurnal Fisika dan Terapannya Vol 6 No 2 (2019): Desember
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (349.564 KB) | DOI: 10.24252/jft.v6i2.11744

Abstract

The Research has been conducted which aims to determine the type of fluid on the power generated in the Miniature (PLTU) Steam Power Plant. The results obtained show that the turbidity level of water in aquades is 0.0 NTU, the turbidity level in 1.2 NTU well water and the turbidity level in river water is 6.5 NTU, with the concentration of acidity in aquades 5.6, at water concentrations wells 5.5 and at river water concentrations 5.2. COD content in aquades 63.2 mg / L, in well water 110.6 mg/L, in river water 189.6 mg / L, BOD content in aquades 2.2 ppm, in well water 1.1 ppm, and at 0.2 ppm river water based on the results of research that has been done can be concluded that the type of fluid influences the amount of electric power generated in the sample aquades 0.021 watts, in well water 0.006 watts, in river water 0.004 watts.
HUBUNGAN INTENSITAS CAHAYA DAN JARAK PANCARAN SEBAGAI HUKUM KEBALIKAN KUADRAT Zelviani, Sri; Albar, Ahmad
JFT : Jurnal Fisika dan Terapannya Vol 5, No 1 (2018): Juni
Publisher : UIN Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (563.357 KB)

Abstract

This research aims to determine the relationship between light intensity and beam distance as the inverse square law. From the experimental results it was found that the relationship between light intensity with the distance of the beam that is the farther the distance of the beam used, the intensity of the light obtained will be smaller, and vice versa. From the results of research conducted, obtained results for an average light intensity of 2.0636 Cd.
IDENTIFIKASI DAERAH RAWAN LONGSOR DI KECAMATAN CAMBA KABUPATEN MAROS MENGGUNAKAN MIKROTREMOR Nirmayanti, Nirmayanti; Rahmaniah, Rahmaniah; Zelviani, Sri
JFT : Jurnal Fisika dan Terapannya Vol 4 No 2 (2017): Desember
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (783.739 KB) | DOI: 10.24252/jft.v4i2.10256

Abstract

A study entitled Identification of Landslide-Prone Areas in Camba Sub-District, Maros Regency Using Microtremor has been carried out. Microtremor is ground vibration other than earthquake, it can be a vibration due to human activities and natural activities. So microtremor can occur due to vibrations due to people who are walking, car vibrations, vibrations of factory machines, wind vibrations, ocean waves or natural vibrations from the ground. This study aims to determine how much the dominant frequency produced in microtremor measurements in landslide prone areas in Camba sub-district, Maros district. Data collection was carried out by 10 points. The data obtained were processed using geopsy software. Based on the research that has been carried out, it can be concluded that the measurement point that has the biggest landslide potential is at the measurement point that has the smallest dominant frequency value with a large dominant frequency of 0.73 Hz and the measurement point that has the smallest landslide potential is at the measurement point that has a value the largest dominant frequency with a dominant frequency of 8.27 Hz. The most dominant frequency value that appears is 5 Hz.
STRUKTUR BATUAN PENYUSUN DESA PADA’ELO KECAMATAN MALLAWA KABUPATEN MAROS Musriadi, Musriadi; Wahyuni, Ayusari; Zelviani, Sri; Trihendriansyah, Trihendriansyah; Lestari, Utari
JFT : Jurnal Fisika dan Terapannya Vol 6 No 1 (2019): Juni
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (737.71 KB) | DOI: 10.24252/jft.v6i1.10194

Abstract

This field study aims to look at the structure of rock layers and formations in the Mallawa area of Maros Regency. The method used in this studi is sampling at two points where these two points are estimated to have alignment on the layer. This method is a method of observation, direct measurement, and rock sampling at each point. From . This is obtained by several rock samples from each point which are then tested using water which serves to test the permeability and porosity of rock samples, while the hardness of the rock is tested by giving a scratch on the sample. From the research it was concluded that in general the rock structure in Pada’ Elo, Kecamatan. Mallawa, Maros Regency is composed of sedimentary rock formations.
PENGUKURAN STRIKE DAN DIP DI DESA PADAELO’ KECAMATAN MALLAWA KABUPATEN MAROS SULAWESI SELATAN Wahyuni, Ayusari; Fuadi, Nurul; Zelviani, Sri; Ayu, Dya; Aminah, Aminah; Azyurah, Zilmi; Nur, Fenty
JFT : Jurnal Fisika dan Terapannya Vol 6 No 1 (2019): Juni
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (629.108 KB) | DOI: 10.24252/jft.v6i1.10195

Abstract

It has been done field lectures to determine Strike and dip in the village in the ELO district, Mallawa Maros South Sulawesi Regency. The purpose of this lecture is to know the value of Strike and dip in the lecture site field. The methods used are methods of discussion, sampling and measurement. The tools used are geological compass, GPS, geological Hammer, ATK and meter. From the results of measurements obtained Strike and DIP N353oE/64o value at the location of the lecture field.
PENGUKURAN RADIOAKTIVITAS GAMMA PADA SAMPEL TANAH DI DAERAH KABUPATEN MAMUJU Imran, Dzulqadri; Iswadi, Iswadi; Zelviani, Sri; Supriyatni, Elisabeth
JFT : Jurnal Fisika dan Terapannya Vol 6 No 1 (2019): Juni
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (902.825 KB) | DOI: 10.24252/jft.v6i1.12717

Abstract

The research aims to determine the level of radioactivity in the district of Mamuju and compare it with other land activities. and prove previous research on land activity in Mamuju is quite high. Measurements are done using the method of counting and identifying. That is identifying the radionuclides contained in the sample according to the Uranium and Thorium series. The tools used are LBC (Low Background Counter) and Gamma spectrometry. The results showed that: land activity in all samples has exceeded the limits established by PERKA BAPETEN and IAEA (International of Atomic Agency). The highest radioactivity results are found in the Takandeang region. And on all three samples showed the results of a very significant natural radionulida activity on vulnerable concentrations of activity in European countries.
PENGUJIAN KERAPATAN DAN KADAR AIR SERTA PENGUJIAN KOEFISIEN ABSORBSI UNTUK MENGETAHUI PENGARUH VARIASI KETEBALAN DAN FREKUENSI TERHADAP PAPAN AKUSTIK BERBAHAN DASAR DAUN PANDAN DURI (PANDANUS TECTORIUS) Hasan, Hasniati; Sahara, Sahara; Zelviani, Sri
JFT : Jurnal Fisika dan Terapannya Vol 6 No 2 (2019): Desember
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (554.102 KB) | DOI: 10.24252/jft.v6i2.11707

Abstract

Penelitian ini bertujuan untuk mempelajari sifat-sifat fisis yang terkait dengan hasil dan kadar air papan akustik berbahan dasar daun pandan duri serta mempelajari variasi ketebalan dan frekuensi terhadap koefisien absorbsi bunyi papan akustik berbahan dasar daun pandan duri. Metode yang digunakan pada penelitian ini yaitu membuat papan akustik dengan dua jenis sampel yaitu sampel tumbuk dan sampel blender dengan ketebalan 0,7 cm, 1,0 cm, 1,2 cm dan 1,5 cm, serta mengukur nilai kerapatan, kadar air dan koefisien penyerapan dengan variasi ketebalan dan frekuensi. Nilai besar yang digunakan adalah 125 Hz, 250 Hz, 500 Hz, 1000 Hz, 2000 Hz dan 4000 Hz. Berdasarkan hasil penelitian yang diperoleh nilai koefisien absorbsi berbanding terbalik dengan ketebalan, di mana semakin tebal suatu bahan maka semakin kecil koefisien absorbsi.Kata Kunci: Daun Pandan Duri, Akustik, Koefisien Absorbsi, Frekuensi, Kerapatan, Kadar Air, Resin poliester
PENGUKURAN DAN ANALISIS DOSIS PROTEKSI RADIASI SINAR-X DI UNIT RADIOLOGI RS. IBNU SINA YW-UMI Rahmayani, Rai; Sahara, Sahara; Zelviani, Sri
JFT : Jurnal Fisika dan Terapannya Vol 7 No 1 (2020): Juni
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v7i1.14118

Abstract

This study aims to determine the dose of radiation in a large room with measurements from various directions, knowing the great wall by measuring the absorption of a scattering outdoors doses, and determine the radiation dose received by radiation workers in radiology installations. This study uses Surveymeter, the meter, the best ruler X-rays, and phantom. In measurements carried out three phases: the first measure exposure dose in a room with a distance of 1 m and 2 m with a voltage of 50 kV, 55 kV and 60 kV, the second stage taking the raw data of radiation received by workers of the head of the installation and the third stage knowing absorption wall by measuring the scattering dose outdoors. Based on the research that has been done, it can be concluded that the largest radiation dose is on the right side of the tube either with an object that is 33 µSv/h or without an object that is 33.6 µSv/h at a distance of 1 m and a voltage of 60 kV, but the value at both the other positions, namely the left and front side of the plane do not have such a large difference that it can be stated that the values obtained at the three positions are almost the same at the same voltage and distance, the largest dose received by operator IV is 0.215 mSv/h and the average dose the average received by workers is 0.2 mSv/h in accordance with Regulation of BAPETEN No.4 of 2013, and the ability of the walls to absorb outdoor radiation doses is very good as seen from the results of undetectable radiation measurements because all are absorbed by the wall.  
Co-Authors Abadi, Firdaus Alam Albar, Ahmad Aminah Aminah Ayu, Dya Azyurah, Zilmi Desianti, Ika Elisabeth Supriyatni Fuadi, Nurul Hadi Nasbey Hasan, Hasniati Ihsan Ihsan Imran, Dzulqadri Jamhari Jamhari Lestari, Utari Muh. Said L Musriadi, Musriadi Narti Narti, Narti Nirmayanti, Nirmayanti Nur, Fenty Nurmin Nurmin Nurul Wahidah Rahmaniah, Rahmaniah Rahmayani, Rai Trihendriansyah, Trihendriansyah Wahyuni, Ayusari Yoga Yuniadi