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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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PROSES PELAPISAN NIKEL DIATAS AL DENGAN METODE ELEKTROPLATING Cahaya Rosyidan; Mustamina Maulani; Lisa Samura; Onnie Ridaliani
Jurnal Teori dan Aplikasi Fisika Vol. 10 No. 1 (2022): 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.v10i1.292

Abstract

The Effect Of Exposure Index Variations On Subjective Quality Assessment On Lumbosacral Examination Putri Rahmawanti; Muhammad Irsal; Gando Sari
Jurnal Teori dan Aplikasi Fisika Vol. 10 No. 1 (2022): 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.v10i1.293

Abstract

Exposure index (EI) is an indicator of dose used to determine overexposed, optimal and underexposed images so that this study discusses the effect of EI variations on subjective image quality assessment on lumbosacral examination. This research uses descriptive quantitative method by filling out questionnaires and calculating the radiation output dose. Then to draw conclusions, perform a visual grading analysis (VGA) statistical test using the one-way ANOVA test. The results obtained by varying the EI for AP projections of 2.99 (overexposed), 2.79 (optimal), and 2.33 (underexposed) then for Lateral projections of 2.91 (overexposed), 2.76 (optimal), and 2.46 (underexposed). Furthermore, the dose calculation using the radiation output equation produces 3.158 mGy (overexposed), 0.78 mGy (optimal) and 0.57 mGy (underexposed) for the AP projection while for the lateral projection it produces a radiation dose of 3.61 mGy (overexposed), 1.52 mGy (optimal). , and 0.78 mGy (underexposed). Then to get a conclusion, VGA test was carried out using ANOVA testing, the data generated after performing ANOVA tests on AP and lateral projections showed results of 0.87 and 0.612. Based on the results of the ANOVA that has been carried out, the conclusion is that all respondents have the same assessment of the quality of the lumbosacral image that the image with the overexposed EI indicator is a better image than the image with the optimal and underexposed EI indicator.
Pengaruh Waktu Penambahan Doping Fluor terhadap Luas Permukaan dan Struktur Nanotitania dengan Menggunakan Metode Sol-Gel Puji Lestari; Posman Manurung; Pulung Karo-karo
Jurnal Teori dan Aplikasi Fisika Vol. 10 No. 2 (2022): 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.v10i2.294

Abstract

Variasi Doping Pb Terhadap Pertumbuhan Fase Superkonduktor BPSCCO-2223 Pada Kadar Ca = 2,10 mol Menggunakan Metode Pencampuran Basah Ade Setiawan; Suprihatin Suprihatin; Roniyus Marjunus
Jurnal Teori dan Aplikasi Fisika Vol. 10 No. 2 (2022): 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.v10i2.295

Abstract

Karakteristik Struktur, Fungsionalitas dan Sifat Fisis Silika Aspal Dengan Perbandingan 65%: 35% Novendra Prisbana Tarigan; Simon Sembiring; Leni Rumiyanti
Jurnal Teori dan Aplikasi Fisika Vol. 10 No. 2 (2022): 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.v10i2.296

Abstract

Synthesis and characterization of silica composites of rice husk and asphalt with a ratio of 65%: 35% has been carried out. This study aims to see the characteristics of the structure, functionality and physical properties, namely moisture content and thickness development of the sample. The synthesis of silica from rice husks was carried out by the sol-gel method. Based on the research that has been done, the XRD characterization results obtained in the sample have the structure of silica and amorphous carbon, then the results of FTIR characterization show the Si - OH functional group (silanol) occurs at wave number 3528, metal hydroxide Si - OH (silanol) is oxidized to Si - O - Si and Si - O were formed at wave numbers 1081 cm-1, 792 cm-1 and 471 cm-1 and the formation of the C - H stretching functional group occurred at wave numbers 2932 cm-1, 2853 cm-1. Then test the physical properties of water content of 5.813% with a change in thickness development of 9.753%. So it can be concluded that the addition of bitumen to the silica sample changes the phase structure of the sample and changes the original spectrum of rice husk silica.
Desain dan Realisasi Alat Ukur Massa (Neraca Digital) Menggunakan Sensor Load Cell Berbasis Arduino Aditia Saputra; Junaidi Junaidi; Amir Supriyanto; Arif Surtono
Jurnal Teori dan Aplikasi Fisika Vol. 10 No. 2 (2022): 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.v10i2.297

Abstract

SINTESIS DAN KARAKTERISASI SERAT NANOTITANIA DENGAN METODE ELECTROSPINNING Nurul Oktavia; Posman Manurung; Junaidi Junaidi; Pulung Karo-Karo
Jurnal Teori dan Aplikasi Fisika Vol. 10 No. 2 (2022): 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.v10i2.298

Abstract

Pengaruh Isopropil Alkohol (IPA) pada Pembentukan Nanotitania Menggunakan Metode Hidrotermal pada Temperatur 250 oC Maharani Maharani; Posman Manurung; Ediman Ginting
Jurnal Teori dan Aplikasi Fisika Vol. 10 No. 2 (2022): 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.v10i2.299

Abstract

Research has been carried out on the effect of adding isopropyl alcohol (IPA) on the formation of nano titania. This study aims to determine the effect of adding IPA on the phase formation and particle size of TiO2. In this study, nano titania was synthesized by hydrothermal method at a temperature of 250oC with a variety of different IPA additions, namely 0.2 ml, 0.4 ml, 0.6 ml, and 0.8 ml. Samples were characterized using X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). The XRD characterization results showed that the diffraction peaks were following the standard database and showed anatase, rutile, and brookite phases. The particle size is calculated from the FWHM value using the Scherrer equation, which is in the 10-13 nm range for the anatase phase and the rutile phase in the 18-20 nm range. The results of SEM characterization in the 04IPA sample showed that the morphology was not perfectly round and the grain size was not uniform.
CALIBRATION TEST RESULT ACCELEROMETER SENSOR Quart Ferrina; Sri Ratna Sulistiyanti; Junaidi Junaidi
Jurnal Teori dan Aplikasi Fisika Vol. 10 No. 2 (2022): 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.v10i2.300

Abstract

Abstract. MEMS sensors commonly used in various studies for cost efficiency in production and well produced in large quantities. Sensor calibrate was important because of large quantities product and ensure that product can be operate proper and the output based on standard production. The ADXL345 sensor calibration test is carried out by measuring the output acceleration on a combination of 3 axes X, Y, and Z, named X+ (X axis gets a positive gravitational acceleration of 1 g), X (X axis gets a negative gravitational acceleration of 1 g), Y+, Y - , Z+, and Z-. A total of 100 data were collected and 10 data were presented in tables in each condition and presented in graphical form. ZeroG offset testing on the X-axis and Y-axis is carried out in the Z+ condition because in this condition the X-axis and Y-axis get a natural acceleration of Earth's gravity of 0 g. In this condition, the acceleration value on the Z axis is 0.9074g . For the X axis is -0.0048 g and -0.0778 g for the Y axis. This value is obtained from the average acceleration value of the X axis and Y axis in the Z+ condition. The zeroG offset test on the Z axis is determined by taking the middle value of the average measurement results in the Z+ and Z- conditions. This value is not the same as the typical value in the datasheet of 0 g, but the 0g offset value of these three axes is still within the minimum range of the sensor datasheet. The sensitivity value of the sensor in the calibration test results has a tendency to differ on each axis. The X-axis of 4.0012 mg/LSB maximum range, Y-axis of 3.9900 mg/LSB close to the values on the data sheet, and Z-axis of 3.7403 mg/LSB near the range of values
Karakteristik Kuat Tekan Buis Beton Ditinjau dari Komposisi Campuran Endang Sri Astutik; Sri Handono Budi Prastowo; I Ketut Mahardika
Jurnal Teori dan Aplikasi Fisika Vol. 10 No. 2 (2022): 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.v10i2.301

Abstract

Research has been carried out on the characteristics of the compressive strength of concrete in terms of the composition of the mixture using firewood ash and without a mixture of firewood ash. This study aims to determine the compressive strength of concrete with the addition of firewood ash and to compare the compressive strength of concrete without the addition of wood ash using different ratios of sand. The composition of the wood ash variations added were 0%, 5%, 10%, 15% and 20% of the cement mass using a ratio between cement and sand of 1:4. While the composition of buis concrete without the addition of firewood ash uses a ratio of 1:2, 1:3, 1:4, 1:5 and 1:6. Testing of the concrete buis sample was carried out at the age of 28 days. The test results showed that the compressive strength of the concrete sample with the addition of firewood ash was 18 MPa, 15 MPa, 17 MPa, 15 MPa and 13.5 MPa, respectively. While the compressive strength of concrete samples without the addition of firewood ash using different sand ratios, respectively, is 31 MPa, 20 MPa, 18 MPa, 15 MPa and 13 MPa. The results show that the more additional wood ash used, the lower the compressive strength value. While the sample without the addition of wood ash shows that the more cement used, the higher the value of the compressive strength. However, when viewed from an economic point of view, the optimal level of firewood ash addition is 10% of the cement mass with a compressive strength value of 17 MPa.

Page 27 of 40 | Total Record : 395

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