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Jurnal Teori dan Aplikasi Fisika
Published by Universitas Lampung
ISSN : 2303016X     EISSN : 25491156     DOI : https://doi.org/10.23960/jtaf.v14i01
Core Subject : Science, Engineering,
Astronomy Electrical & Electronics Engineering Materials Science & Nanotechnology Physics
We invite authors to submit manuscripts of up to 10 pages, prepared in accordance with the author guidelines. The scope of this journal includes, but is not limited to, the following fields: 1. Theoretical Physics Classical Mechanics Electromagnetics Thermodynamics Statistical Mechanics Quantum Mechanics Theory of Relativity Quantum Gravity Astrophysics Cosmology 2. Earth Physics (Geophysics) Geothermal Geoelectrics Seismics Geomagnetics 3. Materials Physics Nanomaterials Metals and Corrosion Magnetic Materials Thin Films Photocatalysts/Catalysts Semiconductors Superconductors Ceramics Polymers 4. Electronics and Instrumentation Sensors Biomedical Instrumentation Agricultural Instrumentation Environmental Instrumentation Biophysics Computational Physics Lasers 5. Nuclear Physics Reactor Safety Neutronic Analysis Fuel and Waste Management
Arjuna Subject : Fisika dan Astronomi - Fisika dan Astronomi (Lain-Lain)
Articles 395 Documents
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Studi Awal Analisator Perubahan Sifat Elektrik Materi Cair yang Berinteraksi dengan Cahaya untuk Aplikasi Spektrometri angga wahyu pratama; Arif Surtono; Junaidi Junaidi
Jurnal Teori dan Aplikasi Fisika Vol. 7 No. 1 (2019): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v7i1.200

Abstract

An initial study research has been carried out on the realization of electrical properties analyzer of liquids that interact with light to be applied to spectrometry. This study aims to develop a spectrometry method based on changes in electrical resistance in liquids when interacting with laser. Methylene blue solution was used as a sample that illuminated by a laser with 650 nm wavelength.The laser beam causes a change in electrical resistance in the methylene blue solution detected by Arduino Nano and converted to a concentration quantity. The conversion equation for changes in electrical resistance to concentration was obtained from the measurement of the change in electrical resistance of methylene blue solutions at concentration of 100 ppm, 200 ppm, 400 ppm, 600 ppm, 800 ppm, 1000 ppm. The equation was obtained based on the exponential regression approach with error value of 15,70 %. The analyzer test was carried out by measuring the concentration of methylene blur solution at a concentration of 500 ppm, 600 ppm, and 700 ppm. The test results show an error value of 9,83 %.
Pengaruh Suhu Sintering Terhadap Tingkat Kemurnian Fase Superkonduktor BPSCCO-2223 pada Kadar Ca 2,10 Menggunakan Metode Pencampuran Basah Rizki Putri Surahman; Suprihatin Suprihatin; Agus Riyanto
Jurnal Teori dan Aplikasi Fisika Vol. 7 No. 1 (2019): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v7i1.201

Abstract

Efektivitas Ekstrak Daun Pepaya (Carica papaya L.) sebagai Inhibitor pada Baja Karbon AISI 1020 dalam Medium Korosif NaCl 3% Repangga Yudi Aditama; Ediman Ginting Suka; Syafriadi Syafriadi
Jurnal Teori dan Aplikasi Fisika Vol. 7 No. 1 (2019): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v7i1.202

Abstract

Papaya leaf extract used as an inhibitor in carbon steel sample AISI 1020, was immersed in a 3% carboxy NaCl medium. By varying the immersion time of 4 days and 8 days, and also the concentration of inhibitor 0%, 3%, 5% and 7%. After the treatment of the sample obtained the slowest corrosion rate calculation results in AISI 1020 4.5 samples and the fastest in the AISI 1020 8.7 sample. The inhibitor used has the most efficient efficiency value in the AISI 1020 4.5 sample and the inefficient value in the AISI 1020 4.7 sample. The XRD characterization results show that the crystalline structure formed is BBC with pure Fe phase. The SEM characterization shows the surface morphology of the steel sample, visible in the sample without the addition of more inhibitors than the sample with the added inhibitor. In addition, cracks do not appear on the AISI 1020 4.5 sample. Characterization of EDS in the sample seen elements of Oxygen (O) and Clorin (Cl) which indicates that the sample has been corroded.
Karakteristik Fungsional Dan Sifat Fisis Aspal Akibat Penambahan Silika Sekam Padi Siti Isma; Simon Sembiring; Wasimton Simanjuntak
Jurnal Teori dan Aplikasi Fisika Vol. 7 No. 1 (2019): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v7i1.203

Abstract

This study was conducted to determine the functional characteristics and physical properties of asphalt due to the addition of silica rice husk. Asphalt penetration 60/70 was combined with silica sourced from extracted rice husks using the sol gel method with 1.5% NaOH solvent and 10% HNO3 solvent. Comparison of asphalt and silica masses is 1: 1.8; 1: 1,9; and 1: 2, then asphalt and silica alloys are heated at 110oC for 4 hours. The results of Fourier Transform Infra-Red (FTIR) analysis showed that the O-H group was formed after the addition of silica. The functional groups seen are functional groups associated with asphalt and silica that is C-H, Si-OH, Si-O-Si, and Si-O. The results of swelling thickness and degradation physical tests (diameter, thickness, and volume) indicate that this material is quite stable. In each addition of silica the increase in increment occurs only slightly. This proves that the interaction between asphalt and silica that occurs physically and does not occur in a chemical reaction.
Sifat Fisis Komposit Polietilen/Nanotitania Sebagai Fungsi Ketebalan Nola Fricilia; Posman Manurung; Agus Riyanto
Jurnal Teori dan Aplikasi Fisika Vol. 7 No. 1 (2019): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v7i1.204

Abstract

Pengaruh waktu sintering Terhadap tingkat kemurnian fase Superkonduktor BPSCCO-2223 dengan Kadar Ca 2,10 Menggunakan Metode Pencampuran Basah Isnaini Rahayu; Suprihatin Suprihatin; Agus Riyanto
Jurnal Teori dan Aplikasi Fisika Vol. 7 No. 1 (2019): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v7i1.205

Abstract

Studi Desain High Temperature Gas-Cooled Reactor (HTGR) Berpendingin Gas Hidrogen Menggunakan Bahan Bakar Thorium Dika Riyan Saputra; Yanti Yulianti; Agus Riyanto
Jurnal Teori dan Aplikasi Fisika Vol. 7 No. 1 (2019): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v7i1.206

Abstract

The Research of design reactor HTGR cell core with thorium fuel and hydrogen gas cooled using SRAC program has been done. The reactor was designed to generate maximum thermal power and critical conditions. The parameters on this study are fuel enrichment, atomic density, size and configuration of reactor core, criticality and the distribution of power density. Reactor core calculation was done in two dimensional core (x,y) at 1/6 part of the reactor core with a triangular mesh. The fuel was Th232 and U233, and hydrogen as coolant. In this study, the ideal reactor core design was length (x) was 428 cm and width (y) was 214 cm, the first fuel enrichment was 6,037% and second fuel enrichment was 8%. Reactor core design in this study generated 60 MWth thermal power with maximum power density was 179,6747 Watt/cm3 which is located at x=1, y=18 point and effective multiplication (keff) is 1,000005.
Desain Teras Reaktor High Temperatur Gas-Cooled Reactor (HTGR) Model Mesh Triangular Dua Dimensi Berbahan Bakar Thorium Berpendingin Gas CO2 Nasta Melia Dilaga; Yanti Yulianti; Agus Riyanto
Jurnal Teori dan Aplikasi Fisika Vol. 7 No. 1 (2019): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v7i1.207

Abstract

The research of design reactor HTGR cell core with two dimensional triangular mesh model using thorium fueled and CO2 coolant has been done. Objective of the research was design critical condition of HTGR cell core so as obtained critical condition and high thermal power. The neutronic analyzed by CITATION of SRAC on 1/6 of reactor cell core. The parameter which analyzed were core fuel enrichment, size and configuration reactor cell core, critically and power density. The result was obtained the ideal reactor design with size (x) 202 cm and (y) 101 cm. The enrichment of first region was 3% and second region was 2.731%. The total thermal power of reactor was 100 MWth, maximum power density of reactor was 107.5371 Watt/cc and keff of reactor was 1.000008.
Sifat Fisis Komposit Pe/Nanosilika sebagai Fungsi Ketebalan Tria Permata Sari; Posman Manurung; Agus Riyanto
Jurnal Teori dan Aplikasi Fisika Vol. 7 No. 1 (2019): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v7i1.208

Abstract

Polyethylene (PE) has been widely used as the insulation material of high voltage cables because of its outstanding physical, chemical, and electrical properties. In this research the amorph nanosilica powders were extracted from pumice using NaOH, H2SO4 and HCl. PE and nanosilica was mixed by mixer at temperature 95 OC and then made the film by using barcoater. The weight percentage of nanosilica was 5 and 10% with thickness of 6, 12 and 25?m respectively. The PE/nanosilica were characterized via Fourier Transform InfraRed (FTIR) spectroscopy and LCR measurement to abtain conductivity and permitivity respons as a function of frequency. The effect thickness on the electrical properties of PE/nanosilica of 5 and 10 % for conductivity values in samples 25 ?m thick has a greater conductivity value. Whereas for the electrica constant of two filer variation shows that the thicker the sample, the greater the electric constant value. Where as for the dielectric constant of two filler variations shows that the ticker the sample, the greater the electric constant value.
Pengaruh Variasi H2SO4 Pada Pembentukan Nanosilika Berbasis Batu Apung Riska Trisna Nuraini; Posman Manurung; Suprihatin Suprihatin
Jurnal Teori dan Aplikasi Fisika Vol. 7 No. 2 (2019): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v7i2.212

Abstract

Page 19 of 40 | Total Record : 395

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