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Item ANALISA DAN PENENTUAN REDAMAN KABEL SERAT OPTIK YANG DIGUNAKAN DALAM SISTEM TELEKOMUNIKASI PADA PT. CHEVRON PACIFIC INDONESIA(2013-07-23) Sitinjak, Tumbur Marudut Tua; Krisman; SalomoShow more The research on analysis and determination of attenuation of optical fiber cables used in telecommunication system at PT. Chevron Pacific Indonesia has been done. Optical fiber that is used is a single mode step index type G.652. Transmitting light in the optical fiber is damped that is physically caused by absorption, losses on optical fiber, switching losses and connector losses and other physical damage. Network testing was done at wavelengths of λ=1310 nm and λ=1550 nm on 6 tracks. OTDR (Optical Time Domain Reflectometer) M200 series and the transmitter network of transmitting optical signals were used for measurement. The method used in this measurement is budget link, in order to measure the performance of communication system of the optical fiber cables as a result of attenuation that occurs along the cable. From measure result by OTDR M200 got highest attenuation is in the IT Tower link to ACME Office at a distance of 1,2 km, with a total attenuation value of 11.5 dB. Attenuation was caused by the lack of impurities of optical fibers and the process of splicing. On the Rangau link to Pelita MS there are 10 cores dropped from 18 cores are available. As for the other cores were in under normal circumstances of that is below the standard (International Telecomunication Union) No. T-REC-G-199802-1 is 0.35 dB/km for wavelength 1310 nm and 0.25 dB/Km for 1550 nm, indicating that of all the links that have been built have good performance and under normal circumstances so that it can be used to operate.Show more Item ANALISA PENGARUH KETEBALAN LEMPENGAN BESI (Fe) TERHADAP INDUKSI MAGNETIK YANG DITIMBULKAN OLEH BEBERAPA MEREK TELEPON SELULER(2016-02-01) Noprianti, Ikrah; Erwin; SalomoShow more Nowadays, a cellular telephone is predicted to generate the effect of electromagnetic radiation on the users. In this research, the measurement of magnetic induction generated by three cellular telephones (sample A, B and C) was demostrated. The measurement was performed in two directions namely horizontal and vertical directions. In order to measure the magnetic induction, was used a Pasco magnetic probe 2162. The magnetic induction in the horizontal direction was measured with the distance of 0,5 cm from the cellular telephone. The effect of a slab of iron with various thicknesses namely 1-4 mm on magnetic induction was also studied. The results of this research showed that the value of magnetic induction generated by the cellular telephone sample A is the highest among brand B and C with the value of 7.73300x10-4 Tesla and followed by sample B and C with the value of 3.6241x10-4 Tesla and 1.41615x10-4 Tesla respectively. The value of magnetic induction in vertical direction decreases very significantly with the distance. Moreover, the magnetic induction increases when a slab of iron with the thickness of 1 mm to 4 mm was introduced.Show more Item ANALISA POLA DIFRAKSI FRAUNHOFER PADA CELAH TUNGGAL DAN PEMBUKTIAN PRINSIP KETIDAKPASTIAN HEISENBERG(2013-07-25) Alfa, R.; Minarni; SalomoShow more A study on Fraunhofer diffraction pattern of a single slit using a He-Ne Laser and Heisenberg uncertainty principle has been conducted. A slit width (s) and a distance from slit to screen (L) are varied to investigate the resulted diffraction patterns. The slit width sizes used are 0,03 mm and 0,06 mm, and L varied from 300-1000 mm. Thedistance between two dark fringes are measured (∆w) until the 5th order and averaged. The an uncertainty constant for Heisenberg uncertainty (A) principle is calculated. The results showed that ∆w values increased as L larger. Uncertainty constant (A) is larger when the slit width (s) smaller with A values equal or bigger than 1, it means the Heisenberg uncertainty principle is proved for the two slits.Show more Item ANALISA TINGKAT KEMAGNETAN DAN SUSEPTIBILITAS MAGNETIK DARI PASIR BESI DI PANTAI PADANG SUMATERA BARAT MENGGUNAKAN PROBE MAGNETIK PASCO PS-2162(2016-05-19) Syahril, Novianti; Erwin; SalomoShow more The measurement of the magnetic degree and magnetic susceptibility of iron sand deposited along Padang beach West Sumatra has been done. The amount of sample of each location was 10 Kg. The sample was completely dried under sun ray before being processed by iron sand separator. The value of total magnetic induction was measured using a magnetic sensor called Pasco magnetic probe PS-2162. Prior to magnetic measurement, it was preparared a rectangular solenoid of 400 turns with the length of 10,0 cm, and side of 3,0 cm. The concentrate of iron sand obtained from iron sand separator was inserted as a core of the solenoid. The total magnetic induction value was measured as a funcion of applied current (2- 10A) to the solenoid and horizontal distance (1-5 mm). The results of this research showed that the highest magnetic degree value of iron sand was obtained from the sample of location B with the value of 5.5%, while the lowest value of magnetic degree was originated from location A with the value of 1.5%. Moreover, the total magnetic induction of the solenoid increased as electric current of the solenoid was increased, and the total value of magnetic induction decreased as a function of the horizontal distance. It was observed that the highest value of magnetic susceptibility was obtained from location B with the value of 4.84 × 10-4 m3 / kg, and the lowest value of magnetic susceptibility from location A with the value of 3.03 × 10-4 m3 / kg. The magnetic susceptibility values obtained were within the interval of 0,001 x 10-4 m3 / kg to 11 x 10-4 m3 / kg, which means that iron sand concentrate derived from Padang beach contains of Fe2O3 and Fe3O4.Show more Item Analisis Parameter Fisis Kolektor Biomassa Sebagai Pengering Kerupuk Singkong(2015-10-26) Juandi; Afriyani, Eka; SalomoShow more Telah dilakukan penelitian tentang pemanfaatan limbah tempurung kelapa sebagai energi biomassa untuk pengeringan kerupuk singkong. Beberapa parameter fisis yang diukur adalah suhu disetiap sisi dinding alat pengering. Karakteristik suhu rata-rata dipengaruhi oleh energi biomassa, karena energi biomassa bekerja mentranfer panas ke ruang pengeringan. Hubungan karakteristik suhu rata-rata untuk rak 1 adalah y = 3E-06x4 – 0,003x3 + 0,020x2 – 0,178x + 61.00 dengan koefisien determinasi R² = 0,883, sedangkan untuk rak 2 adalah y = 3E-06x4 – 0,000x3 + 0,020x2 – 0,213x + 65,01 dengan koefisien determinasi R² = 0,925 . Nilai maksimum karakteristik laju panas yang hilang dipengaruhi oleh laju aliran panas, secara keseluruhan dari alat pengering terjadi pada laju panas yang hilang di bagian atas, sedangkan laju panas yang hilang minimum terjadi pada bagian belakang, hal ini dikarenakan laju aliran panas lebih banyak bergerak ke bagian atas sedangkan pada bagian belakang mengalami hambatan, misalnya hambatan oleh rak. Karakteristik efesiensi sumber energi biomassa dipengaruhi oleh laju udara yang masuk dan pembakaran limbah biomassa.Show more Item Analisis Parameter Fisis Kolektor Biomassa Sebagai Pengering Kerupuk Singkong(2015-12-17) Juandi; Afriyani, Eka; SalomoShow more Telah dilakukan penelitian tentang pemanfaatan limbah tempurung kelapa sebagai energi biomassa untuk pengeringan kerupuk singkong. Beberapa parameter fisis yang diukur adalah suhu disetiap sisi dinding alat pengering. Karakteristik suhu rata-rata dipengaruhi oleh energi biomassa, karena energi biomassa bekerja mentranfer panas ke ruang pengeringan. Hubungan karakteristik suhu rata-rata untuk rak 1 adalah y = 3E-06x4 – 0,003x3 + 0,020x2 – 0,178x + 61.00 dengan koefisien determinasi R² = 0,883, sedangkan untuk rak 2 adalah y = 3E-06x4 – 0,000x3 + 0,020x2 – 0,213x + 65,01 dengan koefisien determinasi R² = 0,925 . Nilai maksimum karakteristik laju panas yang hilang dipengaruhi oleh laju aliran panas, secara keseluruhan dari alat pengering terjadi pada laju panas yang hilang di bagian atas, sedangkan laju panas yang hilang minimum terjadi pada bagian belakang, hal ini dikarenakan laju aliran panas lebih banyak bergerak ke bagian atas sedangkan pada bagian belakang mengalami hambatan, misalnya hambatan oleh rak. Karakteristik efesiensi sumber energi biomassa dipengaruhi oleh laju udara yang masuk dan pembakaran limbah biomassaShow more Item APLIKASI EKSTRAKSI ANTOSIANIN UBI JALAR UNGU DENGAN VARIASI PH PELARUT SEBAGAI DYE DALAM SEL SURYA PEWARNA TERSENSITISASI(2016-02-01) Kurniawan, Novriadi; Sugianto; SalomoShow more Has been conducted a research of extraction anthocyanins from purple-fleshed sweet potatoes used as dye of Dye-Sensitized Solar Cells (DSSC) by using experimental method. This research was peformed to analyze the effect of degree of acidified solvents to DSSC performances. The Anthocyanin was obtained from purple-fleshed sweet potatoes from Pekanbarus’s traditional market. The extraction was carried out using 70% methanol and 7% acetic acid as the solvents. DSSC was built by arranging a sandwich structure,which are the active material of TiO2 wich has been immersed in dye for 24 ours, the electrolit wich has been made from KI and Iodine, the catalys wich has been made from pencil and candle. The Peformance of DSSC was measured by using a halogen lamp 50 Watt as a light source. The highest DSSC performance occurred at pH of 2,5 with the maximum current was 3,9 μA and the maximum voltage was 461 mV and the efficiency was 0,4149%, compared to the other solar cells wich have been made with different degree of acidified solvents, 0,0518% for dye with solvent at pH of 3, 0,0191% for dye with solvent at of pH 3,5, and 0% for dye with solvent pH of 4.Show more Item COMPOSITE ELECTRODES OF ACTIVATED CARBON DERIVED FROM CASSAVA PEEL AND CARBON NANOTUBES FOR SUPERCAPACITOR APPLICATIONS(2014-07-01) Taer, Erman; Iwantono; Taslim, R; Subagio, A; Yulita, M; Salomo; Deraman, MShow more In this paper, composite electrode was prepared from a mixture of activated carbon derived from the pre-carbonization of cassava peel (CP) and carbon nanotubes (CNTs). The activated carbon was produced by pyrolysis process with ZnCl2 as activation agent. The result of N2 adsorption-desorption analysis indicated that the BET surface area of the activated carbon was 1336 m2 g-1. Difference percentage of CNT of 0, 5, 10, 15 and 20% and 5% of PVDF binder were added into CP based activated carbon to fabricate the composite electrodes. The morphology and structure of the prepared composite electrodes were investigated by scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques. The SEM observation revealed the CNT was distributed in homogeny between the carbon particles and XRD result shown the amorphous structure. The supercapacitor cells were fabricated by using composite materials as electrodes, 316L stainless steel as current collector and 1 M acid sulfuric as an electrolyte. Electrochemical characterization was performed by using electrochemical impedance spectroscopy (EIS) method using a solatron 1286 instrumentation. The addition of CNT has been improved the resistance and capacitive properties of supercapacitor cell.Show more Item EIGEN FUNGSI DAN EIGEN ENERGI DARI ELEKTRON DALAM KAWAT KUATUM TANPA IMPURITAS(2013-03-05) Fauzi, Rio; Erwin; SalomoShow more Quantum wire (nanowire) is a wire with nanometer size, where the movement of electrons inside the wire experiences hoping from one site to the next site. If the wire does not have impurities, the electron motion will be ballistic. However, as a matter of fact the creation of quantum wires can not be separated from impurities. In this paper a computer simulation program to fine the Eigen functions and Eigen energy of electrons in one-dimensional quantum wire without impurities was developed. The process of this simulation uses MATLAB version 7 program. Eigen functions and Eigen energy of electrons in a quantum wire can be computed by solving time independent Schrodinger equation. In this research, a computer program comprises of two programs, namely the program and the main program menu. A program menu is used to enter the input data that will be written in the data file. This program allows users to enter the data required in the calculation. The main program is a program used to calculate the Eigen functions and Eigen energy. Computer program to calculate Eigen function and Eigen energy of electron in quantum wire has been created and has been succeeded on the run, and the results are in accordance with the results of theoretical calculations. Eigen value for electron energy on n=1,2,3,4, and 5 obtained 0.0038eV; 0.0151eV; 0.0339eV; 0.0602eV; and 0.0941eV. so for the same n theoretical calculation results are 0.0038eV; 0.0151eV; 0.0339eV; 0.0602eV; and 0.0941eVShow more Item PEMBUATAN ALAT PENGERING SURYA UNTUK HASIL PERTANIAN MENGGUNAKAN KOLEKTOR BERPENUTUP PRISMA SEGITIGA(2014-03-27) Salomo; Ginting, Maksi; Akbar, RShow more Telah dibuat alat pengering tenaga surya untuk mengeringkan singkong dan pisang, singkong diiris melintang dan pisang diiris membujur dengan ketebalan sama, yaitu 2 mm. Pada penelitian ini kolektor berpenutup prisma segitiga yang dihubungkan ke ruang pengering. Udara panas dari kolektor bergerak ke ruang pengering dan dipercepat oleh ventilator yang ada di atas ruang pengering. Penelitian dilakukan mulai pukul 09.00 WIB hingga 15.00 WIB dalam selang waktu pengamatan satu jam, dan dilakukan untuk ruang pengering dalam keadaan kosong dan berisi bahan. Ketika dilakukan pengujian ruang pengering tidak berisi bahan suhu terendah 43,0 oC terjadi pada dulang No.3, saat pukul 09.00 WIB dan tertinggi 52,0 oC pada dulang No.1, ketika jam 12.00 WIB. Massa kering rata-rata singkong di dalam ruang pengering setelah 3 (tiga) hari pengamatan adalah 183,00 g dengan kadar air 2,00 % dan di luar ruang pengering bermassa 227,00 g dengan kadar air 6,00 % dari 500 g bahan yang dikeringkan. Massa kering rata-rata pisang di dalam ruang pengering setelah 3 (tiga) hari pengamatan bermassa 183,50 g dengan kadar air 2,40 % dan di luar ruang pengering sebesar 217,00 g dengan kadar air 6,84 % dari 500 g bahan yang dikeringkan.Show more Item PENENTUAN ENERGI EIGEN PERSAMAAN SCHRODINGER DENGAN SUMUR POTENSIAL SEMBARANG MENGGUNAKAN METODE MATRIKS TRANSFER NUMERIK(2016-02-04) Lubis, Nuraina Fika; Salomo; DefriantoShow more A research has been done in order to find eigen energy for Schrodinger equation at arbitrary potential well by numerical transfer matrix method. Before transfering matrix MATLAB code was made for arbitrary potential well, transfer matrix program was created for square potential well. The calculation results obtained three levels of eigen energy, each of which was worth 0,02860 eV, 0,11282 eV and 0,24589 eV. Transfer matrix program at this potential was considered correct if the eigen energy results don’t differ much with the eigen energy results on analytic formula. In the analytical formula, it was obtained three levels of eigen energy, each of which was worth 0,02854 eV, 0,11185 eV and 0,24579 eV. Comparison of eigen energy results obtained through both equation was slightly different, wherein the percentage difference was less than 0,01%. At arbitrary potential well, there were three levels of eigen energy each worth 0,10001 eV, 0,19001 eV and 0,36999 eV.Show more Item PENENTUAN PARAMETER KISI KRISTAL HEXAGONAL BERDASARKAN POLA DIFRAKSI SINAR-X SECARA KOMPUTASI(2013-07-19) Misnawati, M.; Erwin; SalomoShow more Crystal structure especially lattice parameters in hexagonal system is difficult to be determined in conventional way. Therefore, it is necessarily to involve a computer to perform the calculation of parameters of hexagonal crystal lattice. In this study, two computer programs have been written using a software which is called MATLAB version R2007b. The first program called Program Menu is used to input the parameters required in performing the lattice parameters of crystal calculation. The second program called Main Program is used to determine the lattice parameters (a and c). The X-ray diffraction data was obtained from reference that is included Cobalt, Magnesium, Titanium and Zinc. The most important data from X-Ray diffraction pattern is angle of X-Ray reflected beam (2θ). The Main program will calculate the distance between the planes of unit cell of the crystal (dhkl). Next, the code will continue the calculation to evaluate the value of lattice parameters (a and c) for all possible planes in the unit cell of the crystal. Finally, the code will choose the same value of lattice parameters (a and c) for different crystal planes (hkl). The result of the lattice parameter’s average for Cobalt are = 2.5138 Å and = 4.0799 Å , Magnesium has lattice parameters value of = 3.222 Å and = 5.2326 Å, Titanium has lattice parameters value = 2.9595 Å and = 4.6962 Å, and Zinc has lattice parameters value = 2.6737 Å and = 4.9638 Å. In this result, the values of lattice parameters are comparable with the values of lattice parameters in literature and this result can be acceptable.Show more Item PENGARUH INTI KOIL TERHADAP TEGANGAN INDUKTOR DAN RESISTOR YANG DIRANGKAI SECARA SERI(2013-03-05) Ningsih, Surya; Erwin; SalomoShow more The effect of a piece of metal (called Core) such as Fe (Iron), Cu (Copper), and Al (Aluminum) on inductor’s (coils) voltage and resistance has been studied. The coils were designed by varying their turns that is 50,100, and 150 with the length and diameter of 0,05 m and 0,035 m respectively. These coils were then assembled in series with a resistor whose resistance is 150 Ω, and the voltage source as well as switch. The inductor and resistor’s voltage were measured based on applied current. This measurement was carried out for coil without core and coil with a core such as Fe, Al, and Cu. Based on the results of measurements of the inductor’s voltage of coil with Fe core was higher than without a core, however, resistor’s voltage in coil with the addition Fe was smaller than that of a coil without core. Changing the core with Cu resulted smaller inductor’s voltage compared to that of coil without core and the resistor’s voltage is reversed. Inserting of Al as a core into the coil produced higher inductor’s voltage than that of coil without core, and the resistor’s voltage is opposite. This means the coil with large magnetic field generates large inductor’s voltage while resistor’s voltage of the coil was smallerShow more Item PENGARUH PENAMBAHAN BORON TRIOXIDE (B2O3) TERHADAP KARAKTERISTIK DIELEKTRIK KERAMIK CALCIA STABILIZED ZIRCONIA (CSZ)(2013-07-12) Juari; Salomo; Syarif, D. G.Show more Fabrication of a ceramic dielectric CSZ (Calcia Stabilized Zirconia) with the addition of B2O3 (Boron Trioxide) has been investigated. B2O3 is varied by the composition of 0,25%; 0,5%; and 0,75% with sintering at temperature of 1100o C for 2 hours. The characterization of dielectric constant, crystal structure, and micro structure are done by using LCR meter, XRD (X-Ray Diffractometer) and SEM (Scanning Ellectron Microscope). The results show that the dielectric constant will tend to decrease with the increasing frequency. The formation of crystal structure on ceramic dielectric CSZ consists of mostly phase cubic structure and monoclinic phase structure. By adding B2O3, it makes crystal structures to be monoclinic phase and some part cubic phase. There is no pore on the structure of micro ceramic dielectric CSZ. The pores begin to form due to increment of B2O3. The value of the sintered temperature and the addition of B2O3 significantly affects the crystal and micro ceramic structure CSZ. The use of higher sintered temperature makes the B2O3 tend to highly evaporate and leave the micro structure pores.Show more Item PENGARUH SUHU SINTER TERHADAP KARAKTERISTIK DIELEKTRIK KERAMIK CALCIA STABILIZIED ZIRCONIA (CSZ) DENGAN PENAMBAHAN 0.5% BORON TRIOXIDE (B2O3)(2013-07-11) Kurniawan, H.; Salomo; Gustaman, D.Show more To manufacture a ceramic dielectric made from CSZ 99.5% and 0.5% B2O3 with solid-state reaction has been investivigated. Characterization has been carried out after sintering with temperature of 900 oC, 1000 oC and 1100 oC for 2 hours respectively. The XRD analysis showed that only a cubic phase in 900 oC but with cubic phase and monoclinic phase sintered obtained at temperature 1000 oC and 1100 oC significantly. The monoclinic phase rises at temperature of 1000 to 1100 oC. The data showed that microstructure porosity and grain size were larger with increasing temperature of sintering. The dielectric constant increases with rising temperature sinter. The significant increase in the value of the constant temperature of sintering occurs from 900 to 1000 oC. This concludes that sintering temperature influences the characteristics of ceramic dielectrics.Show more Item PENGUKURAN INDUKSI MAGNETIK YANG DIHASILKAN TELEPON SELULER MENGGUNAKAN PROBE MAGNETIK PASCO(2014-03-26) Syamsiah; Erwin; SalomoShow more Cellular telephone (Hand phone - HP) today has been trendy communication gadget which is small and can be brought by users so that almost everybody posses the hand phone. However, the users claim that weak static magnetic fields (B) are induced around the HP. In this research, measurement of static magnetic induction and magnetic moment induced by three brand HP’s was carried out. These three selected HP’s were named A, B and C. The measurement of static magnetic induction was done for two directions, which were horizontal and vertical directions. The static magnetic induction induced by those HP’s was measured using a Magnetic Probe. For the horizontal direction (x direction), the magnetic induction was recorded with the distance of 0,3 cm from the HP’s. The static magnetic induction was also measured in vertical direction (z-direction). The results showed that the static magnetic induction induced by those HP’s had normal distribution with the position of the peak located near the top of the HP’s. The values of magnetic induction were found to be of 35x10-4 T, 29,6 x 10-4 T and 11,5 x 10-4 T for B, A and C, respectively. For vertical measurement, it was found that the static magnetic induction reduced its values with increasing distance from the HP’s. By plotting B versus distance it was found that the magnetic moment of the HP’s was 1,5 Am2, 1 Am2 and 0,5 Am2 for type A, B and C, respectivelyShow more Item Study Laju Perpindahan Panas Konveksi-Bebas Dari Berbagai Fluida Pada Silinder Berongga Berdasarkan Fungsi Jarak dan Waktu(2013-03-05) Ningsih, Kurnia Gusti; Salomo; U., LazuardiShow more Heat transfer is commonly found in industry such as the heat transfer between pipe and air in steam pipe and boilers. Heat transfer can be divided into three types that are conduction, convection, and radiation. In this paper, a measurement of heat transfer rate that occurs in water and oil in a pipe based on free convection method is described. Temperature measurement system on the fluid using a k-type thermocouple sensor as inputs is connected to an amplifier was while the output of the circuit is connected to an ADC Card Velleman for data acquisition and read by a personal computer. Thermocouple sensors have been tested and calibrated using an oven, then a linear equation was obtanied based on a function of voltage and temperature to convert the sensor output. Based on four point intervals, sensor temperature changed suit with power various. At the minimum and maximum power variation of each sensor value, the specific heat and the coefficient of thermal heat of the fluid. Were obtained with minimum power 216 watt and maximum power 322.7 watt in fluid water, specific heat value obtained are 4026.11 J/KgoC and 4398.8 J/KgoC. Then thermal coefficient are 1.67 W/m2oC and 1.21 W/m2oC. In the petroleum fluid with the minimum 216 watt and maximum 322.7 watt power, specific heat value obtained are 3230.3 J/KgoC and 3891.9 J/KgoC. Then thermal coefficient are 1.22 W/m2oC and 1.48 W/m2oC. The research shows that the longer time is required for the temperature to reach the steady state with the greater power used on itShow more