Journal of Aceh Physics Society
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Study on Amount of Radiation Intensity of Sr-90 and Am-241 for some Commercial Cigarette Filters using Geiger-Muller Detector
Get PDFPengukuran intensitas radiasi pada beberapa filter rokok komersial menggunakan detektor Geiger-Muller dengan sumber radiasi Sr-90 dan Am-241 telah dilakukan. Pengukuran ini dilakukan untuk menghitung besarnya koefisien atenuasi dari filter rokok tersebut. Dalam penelitian ini, jarak dari filter rokok dengan sumber radiasi divariasikan yakni sebesar 6 cm, 7 cm dan 8 cm. Terdapat dua jenis perlakuan sampel yakni sampel filter yang mendapatkan gaya tekan sebesar 5 ton selama 10 menit dan non-tekan (kondisi normal). Hasil penelitian menunjukkan bahwa semakin jauh sumber radiasi terhadap detektor, maka semakin kecil intensitas radiasi yang diperoleh. Daya tembus radiasi dengan sumber Sr-90 lebih besar dibandingkan dengan radiasi Am-241. Oleh karena itu, unsur radioaktif Sr-90 memiliki intensitas yang lebih besar dibandingkan dengan unsur radioaktif Am-241.Study on amount of radiation intensity for some commercial cigarette filters using detector Geiger-Muller with radiation source of Sr-90 and Am-241 has been done. The purpose of the measurement is to measure a mass attenuation of the filter. In this research, the distance of the cigarette filters with the source of radiation was varied i.e 6 cm, 7 cm and 8 cm. The sample cigarette filters was treated, i.e press and non-press (normal condition). The cigarette filters are pressed with a force of 5 tons for 10 minutes using hydraulic press. It was founded that the radiation intensity will decrease with the distance. The amount of radiation intensity of Sr-90 is more higher than Am-241
Identification Content of the Red Dragon Fruit Extract Skin Using Fourier Transform Infrared (FTIR) and Phytochemistry
Get PDFCorrosion is a decline in the quality of the metal due to electrochemical reaction between the metal by a corrosive medium. One effort to reduce the rate of corrosion is by adding inhibitors. Organic inhibitors that can be used include antioxidants and vitamin C. To determine both the content of the test method is used Fourier Transform Infrared (FTIR) and phytochemicals. FTIR is a method to measure used to determine the group and the type of bonding of a compound based on the value of the wave number of a plant. Phytochemical screening is a test of the qualitative secondary metabolites biologically active compounds found in plants. In this study used a sample of red dragon fruit. The results of the analysis provide information regarding the types of biologically active compounds and levels of the active compound contained in the red dragon fruit
The Effect of Sintering Time on Surface Morfology of Pb-Doped Bi-2223 Oxides Superconductors Prepared by the Solid State Reaction Methods at 840 oC
Get PDFThis study was investigating the effect of sintering time (30 h, 32 h, and 34 h) on surface morphology of PbdopedBi-2223 oxides of superconductors prepared by the solid-state reaction method at 840 oC. Thesuperconductor was characterized by X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM).In the present study, phase purity, volume fraction, surface morphology, texturing, crystallinity, grainconnectivity and grain size of the bulk samples are found and compared with each other. The enhancementin the sintering time is confirmed that it will decrease Bi-2223 phase fraction and increase the impurity ofthe samples. SEM images shows that the sample has the best crystallinity, grain connectivity and largestgrain size. Based on the present results, it is conclude that the surface morphological is improving with theincreasing of the sintering time
Study on Hydrogen Gas concentration to Voltage and Resistance using Semiconductor Hydrogen Gas Sensor
Get PDFStudy on hydrogen gas concentration to changes in voltage and resistance using semiconductor hydrogen gas sensor has been done. The system which has been designed will measure any changes in the voltage and resistance of the sensor automatically when the sensor is given a variation of concentration on hydrogen gas. On the condition of gas with low concentration, the sensor output voltage obtained worth 0:08 Volt and the sensor resistance value of 180 K. On the increase in gas concentration causes an increase in sensor output voltage and a decrease in the value of resistanceStudi tentang pengaruh konsentrasi kadar gas hidrogen terhadap perubahan tegangan dan resistansi menggunakan sensor gas hidrogen berbasis semikonduktor telah berhasil dilakukan. Sistem yang telah dirancang akan mengukur setiap perubahan tegangan dan resistansi secara digital pada sensor saat diberikan variasi terhadap konsentrasi kadar gas hidrogen. Pada kondisi gas dengan konsentrasi rendah diperoleh tegangan output sensor senilai 0.08 Volt dan nilai resistansi sensor sebesar 180 K. Pada peningkatan konsentrasi gas menyebabkan peningkatan tegangan output sensor dan sebaliknya terjadi penurunan pada nilai resistans
The DC Electrical Resistivity Curves of Bismuth-2212 Ceramic Superconductors: Evaluation of the Hole-Carrier Concentrations per-Cu Ion
Get PDFIn this study the samples of Bismuth ceramic superconductors were synthesized by the melt textured growth methods from a 2212 stoichiometric composition in order to obtain a large amount of pure Bi-2212. The effects of Pb substitution on the properties of Bi-based Bi2xPbxSr2CaCu2Oy superconductor with x = 0, 0.2, and 0.4 were investigated by means of DC electrical resistivity measurements. It has been found that the hole-carrier concentrations per-Cu ion of the samples change independently of Pb content
Study of Viscosity Measurement by Curved Vibrating Wire Method
Get PDFA simple and compact sensor has been designed for measuring a viscosity of a fluid. The sensor consists of a magnet and a curved thin wire made of copper. The function generator supplies a frequency and the voltage output was reading by the lock-in amplifier. The measuring voltages were analyzed by the curve fitting method numerically
Synthesis and Microstructure Properties of (Bi,Pb)2Sr2Ca1Cu2Oy Ceramic Superconductor
Get PDFProperties of (Bi, Pb)2Sr2Ca1Cu2Oy ceramic superconductors were prepared by the melt textured growth methods in order to investigate the effects of the slow cooling time on the microstructur. Phase analyses of the samples by X-ray diffraction (XRD) has been carried out to assess the effects of the slow cooling time. From XRD analyses, the addition to the sample of the slow cooling time degrades formation of the high-Tc Bi-2212 phase. The possible reasons for the observed degradation in the microstructure properties due to the slow cooling time addition were discussed
Rainwater Quality Measurements in the Area of Bricks Manufacturing at Kajhu Aceh Besar
Get PDFThe study of rainwater quality measurement has been done in brick manufacturing area of Kajhu, Aceh Besar. The measurements are taking place in the three different places when the rain fall from the sky in Kajhu area. The physical parameters that will be measured are pH, TDS, conductivity and potential of electricity
Security Alarm for Motorcycle
Get PDFA security alarm for motorcycle has been developed. This equipment consists of two parts. Part one is as a remote control, where it produces a radio signal with frequency of 37.5 MHz to turn on (activate) or to turn off alarm. Part two consists of sensor, receiver to receive signal from part one, and alarm. This part two will be attached to motorcycle while part one will be kept as a key by the owner of motorcycle. This equipment has been tested in the laboratory and it worked well. When part two is activated by pushing the set button in part one, then any movement of part two (as a movement of motor cycle) by about 20 cm from initial position will cause the alarm sounds continuously. The alarm will be off whenever the reset button in part one is pushed. Part one (a remote control) can activate part two with a maximum of twelve meter separation apart. This shows that the equipment can be used as a security alarm to prevent the motorcycle to be stolen in the future
Gas Emmision Testing of Fuel Based Vehicles at Banda Aceh, Indonesia
Get PDFA gas emmision decent testing of vehicles based on fuel has been done by EIA (Environmental Impact and Analysis). It is important to do the testing to determine the vehicles meet the technical requirements and road-worthy. The results showed that for 1.572 vehicles which is performing emissions testing have obtained 11% that could be potentially pollute the air on vehicles that using gasoline, and 42% on vehicles that using diesel. Based on the total number of four-wheeled vehicles that performed emissions testing in the city of Banda Aceh showed that 82% environmentally friendly vehicles and 18% potentially pollute the air