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ANALISIS SIFAT KONDUKTIVITAS LISTRIK PADA BEBERAPA JENIS MATERIAL DENGAN METODE POTENSIAL JATUH L, Muh. Said
Teknosains Vol 7, No 1 (2013): JANUARI
Publisher : Fakultas Sains dan Teknologi UIN ALauddin

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Abstract

The measurement of conductivity rock coat conducted by using potential method fall. Target of this research is to know how big assess electrics conductivity some homogeneous material type which obtained potential fall and know graph characteristic is nature of conductivity various same material type to function apart friction of potential electrode fall. The pursuant to result of the measurement, that every material have conductivity value which vary, where land containing of brine (salt) conductivity value equal to (0,4760-0,450)m-1, sand coat and gravel equal to (0,0096-0,0078)  m-1, limestone equal to (0,0151-0,01488)  m-1, clay land equal to (0,165-0,156)  m-1, and limestone contain chalk equal to (0,00269-0,00251)  m-1. Rock type/land owning larger ones conductivity is land containing of brine (salt) while smallest conductivity is limestone containing of chalk. Conductivity value every rock coat is land containing of brine (salt) = 0,4626  m-1 with DK=91,47%, sand coat and gravel = 0,0087  m-1 with DK=86,77%, limestone = 0,0150  m-1 with DK=92,18%, clay land = 0,1608  m-1 with DK=83,04%, and limestone containing of chalk = 0,00256  m-1 with DK=92,40%. From is fifth of material type anticipated that conductivity value vary to be caused by the existence of difference of amenity electrics current to emit a stream of in each passed by rock compiler material. Strong difference of current to emit a stream of in rock coat medium very is base on nature of passed by material physical. Nature of the physical for example is porosity, permeability, mass density, and item size measure distribution.Key words: conductivity, material, permeability, potential fall.
PENGUKURAN INTENSITAS RADIASI YANG DIPANCARKAN OLEH HANDPHONE DAN PENGARUHNYA TERHADAP KESEHATAN -, Hartina; -, Iswadi; L, Muh Said
Teknosains Vol 8, No 1 (2014): JANUARI
Publisher : Fakultas Sains dan Teknologi UIN ALauddin

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The research was conducted by taking a sample of 25 pieces of cell phone. Mobile radiation intensity measured electromagnetic waves are receiving phone calls. Measurements were made by placing two headphone in a different room with a range of ± 20 meters. Tool used to measure the intensity of radiation of electromagnetic waves emitted by mobile phone radiation is a measure C32-QX5. Values were collected before phone calls and performed on two conditions after receiving the phone call is a normal condition and the condition of the loudspeaker. The purpose of this study was to determine the intensity of the electromagnetic radiation emitted by mobile phones with different brands and types and determine their effects on health.Results showed that all cell phones that have measured the intensity of the radiation was still safe to use because it has an average radiation intensity 6 mW/cm2, which limits the intensity of radiation that can be tolerated by the body is equal to 10 mW/cm2. The use of mobile phones continuously for one hour a day in the ten-year timeframe, estimated the value of the intensity of radiation received by the body tissue will exceed safe limits.Key words: Intensity Radiation, Measures Radiation, Mobile phone and Health Risk
STUDI PENENTUAN NILAI KALORI PADA BUAH DURIAN (Durio zibethinus) Yanti, Resky Perdana; L, Muh. Said; -, Ihsan
Teknosains Vol 8, No 2 (2014): JULI
Publisher : Fakultas Sains dan Teknologi UIN ALauddin

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Research about Study of Determination Calorie Value in Durian Fruit (Durio zibethinus) has done. This study aims to determine the calorie value of all the materials used. The materials used are durian fruit. Materials will be determined calorie performed on ripe fruit or fresh fruit and fruit that have been dried under the sunlight. Determination of calorie value using two methods: the first method: determination of calorie value by Cobra3 and method II: determination of the calorie value by joule calorimeter. The higher specific heat and heat capacity accordingly calorie value would be even higher.Key words: Specific Heat, Heat Capacity, Calorie Value, Calorimeter.
ANALISIS PENGARUH GAYA TERHADAP FATIGUE LIFE BAJA STRUKTURAL PADA PEGAS DAUN MENGGUNAKAN ANALISIS ELEMEN HINGGA Kusmiran, Amirin; Said L, Muh.
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 (510.152 KB) | DOI: 10.24252/jft.v6i2.11547

Abstract

Leaf spring is one of a component of the vehicle which are used to vibration damping caused by the force. Some cases that occur in the vehicle namely overload. This case can affect to fatigue life of steel leaf spring. One of a method that use to fatigue life prediction is high fatigue cycle where this method can be simulated using the finite element method. The number both element and node used in this research where 6961 element and 14726 nodes, respectively. Magnitude of the force used is 80 KN, 100 KN, and 200 KN where thus force are used to prediction of the fatigue life steel leaf spring. The result of this research revealed force 80 KN have the fatigue life longer than force 200 KN and 200 KN which is 106 cycle. In addition, the critical value of the fatigue life 80 KN is smaller than 100 KN, and 200 KN. As such as, the force 80 KN is recommendation as allowed force which use to vehicle. This value is validated by safety factor analysis where the force allowed as 80 KN with safety factor equal to 2.56.
IDENTIFIKASI INDEKS KERENTANAN SEISMIK DI BENDUNGAN BILI-BILI KABUPATEN GOWA DENGAN METODE HORIZONTAL TO VERTICAL SPECTRAL RATIO (HVSR) Syah, Chairuni; Said L, Muh.; Wahyuni, Ayusari
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 (687.398 KB) | DOI: 10.24252/jft.v4i2.10248

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A research has been conducted to determine the value of seismic vulnerability index and vulnerability index mapping at Bili-Bili dam in Gowa district. This research uses seismometer to record seismic wave signal. Data were collected by 9 measurement points. The data obtained is then processed by software Geopsy using the method Horizontal to Vertical Spectral Ratio (HVSR). The result of data processing obtained by the dominant frequency value (f0) and amplification (A0), then calculated seismic susceptibility index value. Based on the result of research indicate that seismic susceptibility index value in Bili-bili Dam area is 0,358-3,884. This indicates that areas in the Bili-Bili Dam include small to medium vulnerability indexes and are still safe in case of an earthquake.
KARAKTERISTIK TEKTONIK DAN PERIODE ULANG GEMPA BUMI PADA SESAR MATANO SULAWESI SELATAN Hariani, Hariani; Said L, Muh.; Wahyuni, Ayusari
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 (754.409 KB) | DOI: 10.24252/jft.v5i2.10242

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This research aims to determine the tectonic characteristics of the Matano Fault by looking at the a-value and b-value values and the period of earthquake occurrence. Matano fault is an active fault in Sulawesi. So the potential for earthquakes in this area is quite high. By analyzing the earthquake return period, especially for earthquakes with large magnitudes, we can estimate when approximately large earthquakes will occur again and anticipate in dealing with them. Based on the results of research using the Least Square method and the Likelihood the value of a-value (earthquake activity) is higher than the b-value (local rock conditions). This indicates that seismic activity in Matano fault is relatively high. Whereas for b-value (rock condition) The greater the b-value the greater the level of rock fragility and vice versa. In determining the level of seismicity in an area using two methods, namely the least square method with a b-value of 0.310 and a-value of 3.177 while for the Likelihood method a b-value of 0.315 and an a-value of 2,551 from the two methods obtained by different regions that matano faults which have high seismicity or earthquake prone areas. From the calculation using the Least Square method, the fastest return period for M tercepat 4 is around 4 years and the longest is around 23 years while the results obtained from the Likelihood method are the fastest return period around 5 years and the longest is around 48 years.
RANCANG BANGUN ALAT PEMURNI AIR LAUT MENJADI AIR MINUM MENGGUNAKAN SISTEM PIRAMIDA AIR (GREEN HOUSE EFFECT) BAGI MASYARAKAT PULAU DAN PESISIR DI KOTA MAKASSAR L, Muhammad Said; Iswadi, Iswadi
Jurnal Sains dan Pendidikan Fisika Vol 12, No 3 (2016): JURNAL SAINS DAN PENDIDIKAN FISIKA
Publisher : Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (614.314 KB) | DOI: 10.35580/jspf.v12i3.3057

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This research aims to design and make tools purifying sea water became drinking water using water pyramid system and applying to islands and coastal communities in Makassar. The method is performed comprising the steps of selecting the right tools and materials, designing and construction tools, analysis quality testing of water result evaporated and application of tools. The results research show that the water pyramid system is only counting on solar power can turn sea water in to drinking water. The evaporated water quality by using a pyramid system has resulted in the water ready to drink as eligible by the standards of No: 492/MENKES/PER/IV/2010 of April 19th 2010 concerning the quality of drinking water. The result of the application of system tools purifying sea water into drinking water using solar energy has produced an alternative solution for coastal communities and islands to reduce the difficulty of obtaining clean water, so that expenditure needs the purchase of clean water can be reduced.Keywords: Pyramid of water, evaporation, clean water crisis, coastal communities and islands.Penelitian ini bertujuan merancang dan membuat alat pemurni air laut menjadi air minum menggunakan sistem piramida air sekaligus menerapkan ke masyarakat pulau dan pesisir di kota Makassar. Metode yang dilakukan terdiri dari tahap pemilihan alat dan bahan yang tepat, perancangan desain dan konstruksi alat, analisis pengujian kualitas air hasil evaporasi dan penerapan alat. Hasil penelitian menunjukkan bahwa sistem piramida air yang hanya mengandalakan tenaga matahari dapat mengubah air laut menjadi air minum. Kualitas air melalui hasil evaporasi menggunakan sistem piramida telah menghasilkan air yang siap diminum karena memenuhi syarat berdasarkan standar No: 492/ MENKES/PER/IV/2010 tanggal: 19 April 2010 tentang kualitas air minum. Hasil penerapan alat sistem pemurni air laut menjadi air minum dengan menggunakan energi surya telah menghasilkan solusi alternatif bagi masyarakat pesisir dan pulau untuk mengurangi kesulitan memperoleh air bersih, sehingga pengeluaran kebutuhan pembelian air bersih dapat berkurang.Kata Kunci:  Piramida air, evaporasi, krisis air bersih, masyarakat pesisir dan pulau.
DESAIN ALAT PENGUBAH ARUS TEGANGAN DC MENJADI ARUS TEGANGAN AC DENGAN MENGGUNAKAN TRANSISTOR 2N3055 Rahman, Rafiuddin; Lanto, Muhammad Said; Kadir, Ihsan
JFT : Jurnal Fisika dan Terapannya Vol 1 (2014): Desember
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v1i1.15744

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This research was conducted at the Department of Physics Laboratory instrumentation electronics, Faculty of Science and Technology, Alauddin State Islamic University (UIN) Makassar South Sulawesi. Formulation of research problems, namely (1) how to design transformers voltage DC voltage into AC current?, and (2) how much voltage and current is generated in transformers and DC voltage into AC?. In this study only uses transistor types (jengkol) with 2N3055 specifications. The results showed that (1) the design of transformers DC voltage into AC voltage current has been designed using 2N305 transistors to produce a form of inverters with 12 VDC input voltage and output voltage of 250 VAC. (2) The amount of voltage and current transformers resulting in a DC voltage into AC voltage currents generated before given input and output load currents.
RANCANG BANGUN INSINERATOR DUA TAHAP (SOLUSI MENGATASI POLUSI UDARA PADA PEMBAKARAN SAMPAH) Hermansyah, Hermansyah; Said L., Muh.; Hernawati, Hernawati
JFT : Jurnal Fisika dan Terapannya Vol 4 No 1 (2017): Juni
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v4i1.15686

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This study aims to determine the model design and the incinerators tool mechanism to tackle air pollution in burning waste. The filter used is water by spraying using a spray nozzle on the tube filter. Testing is done by testing and observing the work incinerator combustion in incinerators and burning freely. Observations for plastic waste with a mass of 1 kg burned freely color black smoke, combustion rate 2 kg/hours, the combustion efficiency of 67.5 %. Combustion in incinerators two-stage color white smoke, combustion rate of 1.7 kg / h, the combustion efficiency of 67.5 %. At burning incinerator is better than burning freely. Keywords: Insinerator, asap, water spray, air
UJI KUAT TEKAN, DAYA SERAP AIR DAN DENSITAS MATERIAL BATU BATA DENGAN PENAMBAHAN AGREGAT LIMBAH BOTOL KACA Ardi, Andi Wahyuni; Iswadi, Iswadi; Said L, Muh
JFT : Jurnal Fisika dan Terapannya Vol 3 (2016): Desember
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v3i0.16834

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This experiment aims to know the influence of the increment of glass bottle waste to the pressure power, the water absorptive power and the density of the brick material and to know the comparison of the increment of glass bottle waste composition value to the brick material which produces the pressure power, absorptive power and the density match with standard value. This experiment uses tool test like beam with a size long 11 cm, wide 11 cm, height 5 cm with some various of the aggregate of glass bottle composition 0 %, 10 %, 20 %, 30 %, and 40 %. Making brick with the combination of soil, sand, water and the combination of aggregate of blass bottle waste, in the drying process within 1-2 days then burning in the  oven with temperature 900 oC for 3,5 hours. And then the brick is tested 3 parameters are the pressure, the absorptive and the density. Based on the test result it was gotten each of the parametre tests are the minimum value of the pressure is 223,41 kg/cm2 and the maximum is 253,37 kg/cm2 (based ont the class category 200 to 250 based on  SII-0021-1978); the water absorptive value was gotten in minimum is  9,38 %  and the  maximum is 19,05 % (based on  standard SII 15–2094–2000) and the dencity value is 1,48 - 1,64 gr/cm3 (based on  standard).