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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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Design of an Earthquake Intensity Estimation System for Early Warning Trismahargyono Trismahargyono; Sri Ratna Sulistiyanti; Roniyus Marjunus
Jurnal Teori dan Aplikasi Fisika Vol. 9 No. 2 (2021): 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.v9i2.362

Abstract

Sintesis Magnesium Oksida (MgO) dari Dolomit Bangkalan dengan Metode Leaching Devi Saputri; Lydia Rohmawati
Jurnal Teori dan Aplikasi Fisika Vol. 9 No. 2 (2021): 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.v9i2.363

Abstract

Sintesis Soluble Polianilin dengan Variasi Jenis dan Konsentrasi Dopan Retno Fitri Wulandari; Nugrahani primary putri
Jurnal Teori dan Aplikasi Fisika Vol. 9 No. 2 (2021): 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.v9i2.364

Abstract

This study reports the synthesis of soluble polyaniline by the oxidation polymerization method with various dopants HCl, H2SO4, and Fumaric acid (FA). This dopant variation is carried out to obtain polyaniline with optimum solubility and electrical conductivity. The results of FTIR characterization showed several characteristic polyaniline bonds from the samples that had been synthesized. PANi/FA with a concentration of 1M has the best solubility compared to PANi/HCl and PANi/H2SO4, with a solubility value of 5.7% in NMP solvents. The electrical conductivity of all samples was measured by the two-point probe method. PANi / HCl with a concentration of 1M has the best conductivity than PANi/FA and PANi/H2SO4 with a value of 48 x10-4 S/cm. The morphology of the oxidized polyaniline powder was observed using SEM. SEM results showed the morphology of polyaniline in the form of an interconnected sponge.
Pengaruh Medan Listrik sebagai Stimulan Pertumbuhan Bawang Putih Lokal Timor gede arya wiguna; welsiliana welsiliana; florian mayesti prima remba makin; ite morina yostianti tnunay
Jurnal Teori dan Aplikasi Fisika Vol. 9 No. 2 (2021): 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.v9i2.365

Abstract

Sintesis Hidroksiapatit dari Tulang Ikan Sapu-Sapu (Hypostomus plecostomus) dengan Metode Presipitasi Sri Maulidiyah Mangkuasih; Lydia Rohmawati
Jurnal Teori dan Aplikasi Fisika Vol. 9 No. 2 (2021): 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.v9i2.366

Abstract

Delineasi Patahan di Pulau Weh sebagai Perpanjangan The Great Sumatran Fault (GSF) Berdasarkan Data Metode Geomagnetik
Jurnal Teori dan Aplikasi Fisika Vol. 9 No. 2 (2021): 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.v9i2.367

Abstract

Desain Pengendali A Modified Fractional Order PID (PI^? D^?) untuk Pengendalian Level Pressurizer pada Pressurized Water Reactor (PWR)
Jurnal Teori dan Aplikasi Fisika Vol. 9 No. 2 (2021): 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.v9i2.368

Abstract

Analisis Panjang Gelombang Laser Monokromatik Melaui Pola Interferensi Cahaya Dari Kisi Difraksi Transmisi Nurul Fatihah; Fatah Ari Kusuma Wardhana; Giovanni Krisostomos Ory Putra; Rida Siti Nur’aini Mahmudah
Jurnal Teori dan Aplikasi Fisika Vol. 12 No. 02 (2024): 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.v12i02.370

Abstract

This study aimed to prove the concept of diffraction by determining the wavelength of green (532 ± 10) nm and purple (405 ± 10) nm laser pointers using transmission diffraction gratings of light interference patterns. The wavelength measurement results are then compared with the wavelength indicated on the laser. In this study, the distance between the grid and the screen (L) was varied by 100 cm, 75 cm, and 50 cm while the distance between the gaps (d) was varied by 100 lines/mm, 300 lines/mm, and 600 lines/mm. The method used in this study is an experimental method using a transmission diffraction grid and the interference results are displayed on the screen. The results showed data on brightspot distances of order n-1, 2, and 3 from the center of the pattern with variations in laser green and purple, variations in screen distance with grids (L) 100 cm, 75 cm, and 100 cm, and variations in gap width (d) 100 lines/mm, 300 lines/mm, and 600 lines/mm. The data is then analyzed using the bright-pattern constructive interference equation to determine the wavelength. Based on wavelength measurement data, at the same lattice distance with the screen (L) and lattice width (d), the green laser has a brighter distance that is farther apart than the purple laser. The conclusion of this study is that when the gap width is smaller, the distance between the brights will be farther apart or the x value is larger, the results of measuring the wavelength are appropriate on the green laser (532 ± 11) nm, and close to the purple laser (412 ± 23).   Keywords: Wavelength, Laser, Transmission grating, Diffraction, Interference.
Analisis Struktur Kristal dan Morfologi Polikristalin La0,7Ba0,3Mn(1-x)FexO3 (x = 0; 0,1; 0,2; 0,25) dengan Metode Sintesis Sol-Gel Pembakaran Otomatis Sitrat-Nitrat Ryka Usnilawaty; Budhy Kurniawan
Jurnal Teori dan Aplikasi Fisika Vol. 13 No. 01 (2025): 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.v13i01.371

Abstract

Polycrystalline La0.7Ba0.3Mn(1-x)FexO3 (x=0, 0.1, 0.2, 0.25) has been successfully synthesized using the sol-gel citrate-nitrate auto combustion method, with the high purity basic materials of La2O3, Ba(NO3)2, Mn(NO3)2.4H2O, Fe2O3, and C₆H₈O₇.H₂O as reaction fuel. After the gel was formed, the sample was heated at 180oC for 2.5 hours. Calcination was carried out at 800oC for 2 hours. Then the sample was compressed with a pressure of 10 tons, the sample was sintered at a temperature of 900oC for 2 hours. X-Ray Diffraction (XRD) analysis data shows a single phase in the four samples. SEM analysis data shows that the morphology of the particle diameter becomes smaller as the Fe is being added to the Mn site. EDS analysis data shows the element content in the four samples which is in accordance with stoichiometric calculations, and confirms that the product resulting from the sol-gel synthesis is homogeneous. The calculation of Goldschmidt tolerance factor has confirmed that the crystal structure is rhombohedral perovskite structure (0.929, 0.934, 0.939, and 0.941). Keywords: Lanthanum Manganites, Sol-Gel, Polycrystalline, Morphology, Rhombohedral.
Penggunaan Interpolasi Bilinier Pada Akuisisi Data Massa Muhammad Ifan Saputra; Sri Ratna Sulistiyanti; F.X. Arinto Setyawan
Jurnal Teori dan Aplikasi Fisika Vol. 12 No. 02 (2024): 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.v12i02.376

Abstract

The bilinear interpolation method is generally used to improve images that have noise. However, in this research the bilinear interpolation method will be used to determine the weight value of a digital scale designed with four load cell sensors. Data collection was carried out by placing loads at nine different points. The loads used are 2kg and 5kg. The results of this research are that the value of the point in the center or on the axis of the four load cells, namely points B, D, E, F, and H, has the same voltage as the actual value, namely for a 2kg weight of 4.31 mV. and for a weight of 5 kg it is 5.87 mV. Meanwhile, the other points, namely points A, C, G and I, have values ​​that deviate from the actual value by 0.36 mV or an error of 36%.   Keywords: Bilinear Interpolation, Digital Scales, Load Cell Sensors.

Page 34 of 40 | Total Record : 395

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