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Jurnal Teori dan Aplikasi Fisika
Published by Universitas Lampung
ISSN : 2303016X     EISSN : 25491156     DOI : -
Core Subject : Science,
Materials Science & Nanotechnology Physics
Jurnal ini diterbitkan oleh Jurusan Fisika Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Lampung sebagai sarana untuk mempublikasikan hasil penelitian, artikel review dari peneliti-peneliti di bidang fisika teori dan aplikasinya. Jurnal ini terbit dua kali setahun (Januari dan Juli).
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Articles 15 Documents
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Search results for , issue "Vol 6, No 2 (2018): Jurnal Teori dan Aplikasi Fisika" : 15 Documents clear
Analisis Karakteristik Elektrik Limbah Kulit Singkong Berbentuk Pasta Sebagai Sumber Energi Listrik Alternatif Terbarukan Tri Sutanto; Amir Supriyanto; Arif Surtono
Jurnal Teori dan Aplikasi Fisika Vol 6, No 2 (2018): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v6i2.1838

Abstract

The electrical characteristics of cassava peel and cassava can be determined by using a pair of electrode copper (Cu) and zinc (Zn). The measurement of the electrical characteristics of cassava peel had been done using a 5 watt LED load and when the load is released. Cassava peel and cassava are used without fermentation and with fermentation. Electrolyte cell that used consists of 20 cells, which were arranged in series and parallel, with volume + 200 ml for one cell. The maximum power generated cassava peel 5.8597 mW, and 14.1052 mW on cassava. Zn2 electrode (zinc battery used) produces a larger power, which is 5.8597 mW compared with Zn1 (ordinary zinc) is 1.9902 mW. Cassava peel without fermentation produces a larger voltage of 20.76 volts, compared with cassava peel 19.17 volts of fermentation. In cassava peel, circuit cell power in series a larger of 5.8597 volts, compared with circuit power in parallel is 5.7078 volts
Pembuatan dan Karakterisasi Sensor Amonia Berbasis Bending Fiber Optic chandra pratiwi; Gandi Sugandi; Junaidi Junaidi
Jurnal Teori dan Aplikasi Fisika Vol 6, No 2 (2018): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v6i2.2137

Abstract

This research was approved optical fiber bending sensors with good characterization and variations in the concentration of ammonia solution. This research uses experimental methods in the laboratory. The technique was done by stripping multimode optical fibers (cladding measuring 125 μm and core 62 μm) which is exfoliated cladding then replaced by polydimethylsiloxane (PDMS) and bending with the combustion process. The concentration of ammonia solution used in this research varies from 1-10%. Measurement of fiber optic sensors using optical power meter (OPM) with a wavelength of 1310 nm and 1550 nm, and light source (LS) at a frequency of 0 Hz, 270 Hz, 1000 Hz, and 2000 Hz. The result showed that ammonia solution caused instability in light intensity. However, the higher the frequency of light. The lower of the intensity with the difference in intensity produced is very small.Keywords: ammonia, bending, cladding, optical fiber, polydimethylsiloxane (PDMS).
PERHITUNGAN LAJU REAKSI NEUTRON MODEL PERANGKAT ANNULAR PADA JENIS REAKTOR SCWR (SUPERCRITICAL WATER REACTOR) BAHAN BAKAR THORIUM ismatul lisa; Yanti Yulianti; Syafriadi Syafriadi
Jurnal Teori dan Aplikasi Fisika Vol 6, No 2 (2018): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v6i2.1847

Abstract

The calculation of fission reaction rate and capture reaction with and without filters have been done using the REACT of SRAC. The calculation of fission rate on fuel 1 and 2 were 5,39 x 10-2 reaction/cm3s with filter and 6,35 x 10-2 reaction/cm3s without filter, then of capture reaction rate with filter on fuel 1 and 2 were 2,91 x 10-2 reaction/cm3s, without filter on fuel 1 was 3,9 x 10-2reaction/cm3s and fuel 2 was 3,78 x 10-2 reaction/cm3s. The calculation of capture reaction on cladding with filter was higher than without filter was 2,15 x 10-3 reaction/cm3s, on moderator with filter was lower than without filter was 3,18 x 10-3 reaction/cm3s. The highest neutron spectrum with 1% enrichment of experiment 1 in thermal energy was 6,31 x 10-6 MeV-1 and in fast energy was 6,44 x 10-6 MeV-1, and decreased constantly. Meanwhile of experiment 2, neutron spectrum in thermal energy was 1,37 x 10-5 MeV-1 and in fast energy was 6,91 x 10-6 MeV-1, and decreased significantly from 1% to 2% enrichment then decreases constantly until 5% enrichment
Efektivitas Ekstrak Daun Pepaya (Carica papaya L.) Sebagai Inhibitor pada Baja ST37 dalam Medium Korosif NaCl 3% dengan Variasi Waktu Perendaman ramon sanjaya; Ediman Ginting; Agus Riyanto
Jurnal Teori dan Aplikasi Fisika Vol 6, No 2 (2018): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v6i2.1839

Abstract

This research aims to determine the effectiveness of papaya leaf extract (carica papaya l) as  inhibitor on st37 steel in corrosive medium nacl 3 %. To find out the corrosion rate resulted by weight reduction method. To know the phase formed on steel is done XRD analysis. While, to know the micro structure and corrosion products produced on steel after soaked in corrosive medium with inhibitor and without inhibitor papaya leaf extract, SEM and EDS analysis were performed. Based on the results of XRD analysis, SEM and EDS with the addition of inhibitors of the diffraction peaks decreased, and the corroded surface area decreased, and the reduction of FeO content in the sample wass less. From the three analyzes and calculation of corrosion rate obtained that inhibitor papaya leaf extract, effectively inhibiting the corrosion rate on St37 Steel
Sensor Kebocoran Arus Listrik Water Heater Elektrik Hartono Hartono; Sugito Sugito; Farzand Abdullatif
Jurnal Teori dan Aplikasi Fisika Vol 6, No 2 (2018): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v6i2.1504

Abstract

An electric current sensor detecting current leak into water flowing out from a water heater has been constructed. The sensor is made of a copper electrode implanted in a PVC pipe. It is subjected to tests in which the voltage is varied at constant resistance and otherwise the resistance is varied at constant voltage. The variation of the AC voltage is conducted from 0 to 220 volt whereas that of the resistance is from 1 KW to 100 KW. The 1 KW resistance is meant to represent the resistance of human skin in wet condition and the 100 KW represents that of dry insulated skin. Analysis shows that unpainful shock sensation surges at 30 V, 5.16 mA, with 1 KW resistance. In  the current leak condition at 220 V, unpainful shock is sensed at body resistance of 42 KW with 4,99 mA current.
PENGARUH SUHU PADA EKSTRAK DAUN CINCAU HIJAU (CYCLEA BARBATA MIERS) SEBAGAI INHIBITOR KOROSI BAJA PEGAS DAUN intan hani saputri; Ediman Ginting; Dwi Asmi
Jurnal Teori dan Aplikasi Fisika Vol 6, No 2 (2018): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v6i2.1848

Abstract

This study aims to determine the extract of green cincau leaves (Cyclea Barbata Miers) as a corrosion inhibitor soaked in 3% NaCl corrosive medium. To determine the effect of concentration and temperature to connect steel, the average inhibitor is 0, 2, 4, and 6% and each temperature is 40  and 80 . To find out the measurements done by the method, save weight. Corrosion rate at immersion temperature is 40  lower than speed at 80  immersion temperature. To find out the phase formed and the structure of the sample in XRD and SEM-EDS characterization. The X-Ray Diffraction (XRD) characterization results show that the phase formed is pure Fe. XRD results showed that the lowest Fe peaks were formed on samples without inhibitors at 80 .The results of SEM characterization of PGDaun-80-6 steel also showed that it looked more corroded, and the PGDaun-40-2 sample looked slightly corroded. This result is reinforced by the percentage of corrosion products shown in the EDS results
Pengaruh Variasi NaOH terhadap Karakteristik Nanosilika Berbasis Batu Apung Nurqori Setiawati; Posman Manurung; Simon Sembiring
Jurnal Teori dan Aplikasi Fisika Vol 6, No 2 (2018): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v6i2.1842

Abstract

Nanoparticle of silica from pumice rockhas been synthesizedby using extracted method of NaOH with varying of 2,5 Mand 3,5 M.The pumice was extracted using NaOH, silica titration usingH2SO4 and purification of silica using HCl. The solution was calcination at 700°C for 2 hours. The XRD result showed that diffraction pattern of amorphous silica. The EDS result confirmed the purity of silica for NaOH 3,5 M were 75,84%. Particle size from TEM result is(11,32 ± 0,922) nm for NaOH 3,5 M. The surface area for NaOH of 2,5 M and 3,5 M are 178,7 m2/g and186,2m2/g respectively.
ANALISIS KARAKTERISTIK ELEKTRIK AIR LAUT TERSARING SEBAGAI SUMBER ENERGI ALTERNATIF BERKELANJUTAN (SUSTAINABLE ENERGY) Edward Jannert; Gurum Ahmad Pauzi; Amir Supriyanto
Jurnal Teori dan Aplikasi Fisika Vol 6, No 2 (2018): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v6i2.1915

Abstract

The electrical characteristics of filtered seawater can be determined by using Cu-Zn electrode pairs. Seawater is filtered by using a 1 micron sediment filter. Measurement of electrical characteristics of water is carried out using a 3 watt DC LED load and when the load is removed. The electrolyte cell consists of 40 cells, which are arranged in series and parallel with 300 ml per cell. Tool testing is carried out for 144 hours with 6 times electrolyte filling every 24 hours. The test results show that the longer the tool is used, the more electrical characteristics produced will be decreasing. The produce of maximum voltage (Vbl) by seawater is not filtered with a series of 31.5 V. The produce of maximum power (P) by seawater is not filtered with a series of 101.1 mW. The produce of maximum illumination by seawater is not filtered with a series of 426.4 Lux, the duration of the light is 8 hours. Despite the produce of maximum illumination by filtered seawater with a series of 319.7 Lux series, the duration of the light is 11 hours.
ANALISIS DINAMIKA MOLEKUL PROTEIN LYSOZYME PUTIH TELUR DENGAN MODEL POTENSIAL LENNARD-JONES MENGGUNAKAN APLIKASI GROMACS harry prayoga; Yanti Yulianti; Agus Riyanto
Jurnal Teori dan Aplikasi Fisika Vol 6, No 2 (2018): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v6i2.1849

Abstract

The molecular dynamic analysis oflysozyme protein has been done using Gromacs application. Lysozyme protein filled by water in the cubic form with variation of temperature was 300 K, 325 K, and 350 K and calculatedpotential energy values used Lennard Jones equation. Structure protein on temperature was 300 K showed that pressure value was 2,54 barand density value was 997,54 kg/m3 then protein changed in  unfolded state on ARG21-CA and SER81-CAamino acid chain with potential energy was 2992,14 kJ/mol . Structure protein on temperature was 325 K showed that pressure value was 4,84 barand density value was 974 kg/m3 then protein changed in  unfolded state on ASP101-CA and GLN121-CAamino acid chainwith potential energy was 2994,55 kJ/mol.Structure protein on temperature was 350 K showed that pressure value was 0,82 barand density value was 948,747 kg/m3 then protein changed in  unfolded state on ARG21-CA amino acid chain and lost on GLN121-CA amino acid chainwith potential energy was 2994,55 kJ/mol. Root Mean Standard Deviation (RMSD) showed that the protein will be denaturated on  temperature 350 K caused bylost on GLN121-CA amino acid with distance was0.07 nm.
Studi Perhitungan Laju Reaksi Neutron Dalam Reaktor SCWR (Supercritical Water Reactor) Model Perangkat (Assembly) Heksagonal Berbahan Bakar Thorium Apriliana Apriliana; Yanti Yulianti; Pulung Karo Karo
Jurnal Teori dan Aplikasi Fisika Vol 6, No 2 (2018): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v6i2.1844

Abstract

The calculation of fission and capture reaction rate with and without filter has been done using REACT of SRAC. In material 1 fission reaction rate with and without filter were increased by increasing percent of U233. The highest fission reaction rate with filter was 5,7194x10-2reaction/cm3sand without filter was 6,1361x10-2 reaction/cm3s. Meanwhile capture reaction rate with and without filter were decreased by increasing percent of U233. The highest capture reaction rate with filter was 2,2156x10-2 reaction/cm3s and without filter was 2,4906x10-2 reaction/cm3s. In material 3, fission and capture reaction rate with and without filter were decreased by increasing percent of U233 in material 1. The highest fission reaction rate with filter was 1,5218x10-2 reaction/cm3s and without filter was 1,6293x10-2reaction/cm3s. The highest capture reaction rate with filter was 2,2156x10-2 reaction/cm3s and without filter was 2,3993x10-2reaction /cm3s. Neutron reaction rate with filter was smaller than neutron reaction rate without filter

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