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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 11, No 2 (2023): Jurnal Teori dan Aplikasi Fisika" : 15 Documents clear
Solusi Persamaan Difusi Neutron pada Pressurized Water Reactor (PWR) Berbentuk Silinder dengan Bahan Bakar Uranium Daur Ulang Riftaul Kurniawati; Yanti Yulianti; Iqbal Firdaus
Jurnal Teori dan Aplikasi Fisika Vol 11, No 2 (2023): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v11i2.6645

Abstract

The Research on solution of the neutron diffusion equation in a cylindrical Pressurized Water Reactor (PWR) with recycled uranium fuel. The research aims to obtain the distribution of neutron flux in a cylindrical Pressurized Water Reactor (PWR) using recycled uranium fuel. The method was carried out by means of simulations using the C++ programming language including determining the specifications of the reactor core, determining cell geometry and volume fraction, determining atomic density, calculating macroscopic cross-sections with the PIJ module, and calculating the neutron diffusion equation. After obtaining the solution of the neutron diffusion equation, calculations were carried out on ¼ part of the reactor core with a cylindrical cell geometry defined by IGT=3 on SRAC. The results obtained in this study are that the diffusion equation without a source of distribution of the highest neutron flux is in group 1 of 1.1681 × 10-10, the diffusion equation with a fission source of the highest distribution of neutron flux is in group 3 of 4.6009 × 10 -8, the diffusion equation with fission sources and the scattering distribution of the highest neutron flux is in group 3 with the division time of 1.1681 × 10-10, the diffusion equation with fission sources changes the power of 3,000 MW the highest distribution of neutron flux is in the group 3. The highest group has more neutron flux and changes in power do not affect the value of the neutron flux.
Analisis Grafik Karakteristik Sensitivitas Sensor MQ-135 untuk Menentukan Persamaan Hubungan antara ppm dan Rs/Ro Ari Bangkit Sanjaya Umbu
Jurnal Teori dan Aplikasi Fisika Vol 11, No 2 (2023): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v11i2.6656

Abstract

Abstract. MQ-135 sensor is a sensor capable of detecting acetone, toluene, alcohol, carbon dioxide, ammonia, and carbon monoxide. This sensor has been widely used as the main component in gas-based research. Analysis of sensor sensitivity characteristics is the first step for researchers to do to obtain an equation for the relationship between ppm and Rs/Ro. However, in most studies only analyzing gas charts are the object of research. This causes other researchers to do their own analyses for different types of gas. Based on that problem, the authors performed a graphical analysis of the sensitivity characteristics of the MQ-135 sensor for acetone, toluene, alcohol, carbon dioxide, ammonia, and carbon monoxide gases. The coordinate points for these gases are obtained using the WebPlotDigitizer application and coordinate data were analyzed using power regression. Based on the analysis results, the relationship equation between ppm and Rs/Ro for acetone, toluene, alcohol, carbon dioxide, ammonia, and carbon monoxide gas is shown in equations 16, 17, 18, 19, 20, and 21 respectively.
Efektivitas Tungsten sebagai perisai radiasi foton Sitti Yani
Jurnal Teori dan Aplikasi Fisika Vol 11, No 2 (2023): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v11i2.3165

Abstract

Tungsten is a material that has a high density and atomic number which is a potential candidate for photon shielding. In this study, Tungsten material with a thickness of 10 cm was used as a shield for photon with energies of 2 MeV, 3.3 MeV, and 5 MeV. This material shielding was simulated with Monte Carlo based software, Particle and Heavy Ion Transport System (PHITS). The dimensions of the shield material are 40×40×10 cm3 which are placed at various distances from the source:20 cm, 50 cm, and 100 cm. The results obtained show that these photons with energies of 2, 3.3, and 5 MeV can be attenuated by the shield at all defined source distances. The flux of particles passing through the shield decreases with increasing distance. Therefore, Tungsten material can be a candidate for photon shielding in the medical physics field.
Pengolahan Air Sadah Menggunakan Zeolit Buatan Dari Batu Apung Lampung Dan Daun Kerai Payung Nindia Agustin; Pulung Karo Karo; Sudibyo Sudibyo; Suprihatin Suprihatin
Jurnal Teori dan Aplikasi Fisika Vol 11, No 2 (2023): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v11i2.3200

Abstract

This research was conducted to determine the composition and crystal structure of the artificial zeolite produced, as well as the ability of artificial zeolite to reduce calcium and magnesium content in hard water. The zeolite was prepared using the hydrothermal method by mixing sodium silicate from Lampung pumice silica, sodium aluminate from aluminum can waste and charcoal from sunshade umbrellas. The artificial zeolite products were characterized using XRF, XRD, UV-Vis spectrophotometric and ICP-EOS. The results showed that the composition of the artificial zeolite was aluminum, silica, phosphorus, potassium, calcium, titanium, vanadium, chromium, manganum and ferum. The crystal structure of the optimum sample from the UV-Vis spectrophotometric characterization obtained the crystal structure of a natural zeolite type, namely Chabazite. And the artificial zeolite which was tested for adsorption on hard water could reduce the calcium content by 36.57% but could not reduce the magnesium content.
Smart Glove Berbasis IoT dengan Output Teks dan Suara Imam Tri harsoyo; M. Ulin Nuha ABA; Dwi Cahyati
Jurnal Teori dan Aplikasi Fisika Vol 11, No 2 (2023): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v11i2.3212

Abstract

Stroke in Indonesia was the second leading cause of death and third cause of disability in the world. In Indonesia, the proportion of disability adjusted life-years (DALYs) contribution from stroke is around 9.7% and is the number one cause of disability. People with disabilities will have difficulty doing daily activities, especially communication. Therefore it is necessary to develop communication aids that can help stroke sufferers communicate daily by utilizing palm movements. In this study, two flex sensors were placed on the fingers. Communication aids for stroke sufferers function to detect four basic movements, namely: "I want to eat", "I want to drink", "I want to urinate/poop",and “rest”. The four sentences are also displayed on a display and also on the Smartphone. The detection of these four movements is obtained by bending the two fingers which are detected using a flex sensor placed on a glove. This tool is expected to be the development of communication aids for stroke sufferers.
Solusi Persamaan Difusi Neutron Pada PWR (Pressurized Water Reactor) Berbentuk Heksagonal dengan Bahan Bakar Uranium Daur Ulang Risdha Ayu Shinta Dewi; Yanti Yulianti; Iqbal Firdaus
Jurnal Teori dan Aplikasi Fisika Vol 11, No 2 (2023): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v11i2.6646

Abstract

The Research on solution of the neutron diffusion equation with a PWR reactor using recycled uranium fuel at 1⁄6 section of the reactor core with a hexagonal IGT-6 geometry. The purpose of this research is to determine the distribution of the neutron flux in the PWR of recycled uranium fuel. The solution is done by computational simulation using the Dev-C++ programming. The parameters used in this study determine the specifications of the reactor core, determine the volume fraction, determine the atomic density, calculate the macroscopic cross-section with the PIJ module, calculate the neutron diffusion equation, calculate ϕ (x,y) using the Gauss Seidel method. The results obtained in this study are the neutron diffusion equation without a source obtaining the highest relative neutron flux value in group 1 of 4,5729×〖10〗^(-2), with a fission source obtaining the highest relative neutron flux value in group 3 of 7,3327×〖10〗^(-4), with fission and scattering sources obtaining the highest relative neutron flux value found in group 2 of 1,5157×〖10〗^(-3), and 3,200 MW of power is added to the source fission, the value of the neutron flux does not change. This is because the addition of power does not affect the value of the neutron flux.
Pengaruh Variasi Waktu Pemanasan Sintesis Perak Nitrat (AgNO3) Menggunakan Metode Reduksi Kimia Junaidi Junaidi; Muhammad Rizki; Daffa Abdul Malik; Dwi Asmi; Roniyus Marjunus; Pulung Karo Karo
Jurnal Teori dan Aplikasi Fisika Vol 11, No 2 (2023): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v11i2.12308

Abstract

Synthesis of silver nitrate using the chemical reduction method with variations in heating time for 1 hour, 2 hours and 3 hours has been successfully carried out. This study aims to determine the effect of variations in heating time on the phase structure, elemental concentration, morphology, and mass percentage of elements. The synthesis process was carried out by heating a mixture of silver and nitric acid at T = 85 °C for 1 hour, 2 hours and 3 hours, then the evaporation process was carried out at T = 125 °C for 10 minutes. The results of the XRF analysis on the AgNO3 samples showed differences in the percentage of Ag concentrations, with the largest percentage of Ag concentrations produced, namely 98.839% at a 2 hour heating time variation, the presence of impurities in the XRF results of AgNO3 samples at a concentration of more than 1%, with a concentration of impurities the largest is copper (Cu), this is what causes the synthesized sample to turn blue. The results of the XRD analysis showed that the AgNO3 phase had an orthorhombic structure with the largest percentage of AgNO3 produced, namely 27.85% at 2 hours of heating time variation.
Pembuatan Purwarupa Alat Ukur Konsentrasi CO2 Berbasis NodeMCU ESP8266 Fitria Yudita; Nia Syafitri; Dwiria Wahyuni
Jurnal Teori dan Aplikasi Fisika Vol 11, No 2 (2023): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v11i2.11072

Abstract

Carbon dioxide (CO2) is the largest contributor to greenhouse gas emissions, resulting in an increase in global temperatures. Unfortunately, this knowledge is not yet widely known among the general public. Therefore, providing information on daily CO2 levels can serve as a means to educate and raise awareness about the dangers associated with CO2 levels. To simplify access to CO2 concentration information, a prototype of a CO2 concentration measurement device based on the NodeMCU ESP8266 microcontroller, which can be connected to Wi-Fi, has been developed. To ensure data accuracy, the CO2 measurement device was calibrated using the NodeMCU ESP8266 microcontroller and data from an outdoor CO2 monitoring instrument at the BRIN (BPAA Pontianak) office, with an error value of 4.08%. The collected data from this device can be accessed through the Blynk application or a Google Sheets link. The test results demonstrate that the device can provide CO2 concentration levels with higher readings in areas characterized by high vehicle traffic, smoking, combustion activities, or a crowd of people.
Identifikasi Karakteristik Accumulator Menggunakan Citra Termal Berbasis Pengolahan Citra Sri Ratna Sulistiyanti; F.X. Arinto Setyawan; Tiya Muthia; Yudi Eka Putra
Jurnal Teori dan Aplikasi Fisika Vol 11, No 2 (2023): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v11i2.7984

Abstract

Batteries are an important part of the power generation system, both solar power plants and motorized vehicle electrical systems. Battery capacity is something that must be considered for these various activities, because a decrease in battery capacity results in disruption of power distribution to users. The battery in this study is a battery or accumulator. The sample image is obtained using a thermal camera to determine the characteristics of the battery based on color. The basis for identifying characteristics is obtained by separating the RGB color components in the thermal image. Each color component will calculate the average pixel intensity value and see the difference in the resulting value. The results showed that the distinguishing characteristic between the sampling conditions was that the green pixel intensity mean value when the battery was being charged was higher than the condition of the battery before being charged and the condition of the battery when it was loaded. The average value when the battery is on the power side is 107 pixels green, while the average value when the battery is before charging is 81 pixels green and when the battery is loaded the average green value is 82 pixels.
Real-time Visualisasi Temperatur Pada NTC Sensor Array menggunakan Metode Interpolasi Gaussian berbasis Python Joni Joni; Sabar Sabar; Kisna Pertiwi; M. Ikhsanudin; Leo Sinambela
Jurnal Teori dan Aplikasi Fisika Vol 11, No 2 (2023): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v11i2.12465

Abstract

Thermal camera technology has been rapidly advancing in the process of remotely measuring temperature. In addition, thermal cameras can also be used to detect gas, water, and other fluid leaks by measuring the temperature changes in the measured object, such as water pipes within walls that cannot be seen directly with the naked eye. However, thermal cameras have limitations in directly measuring dynamic temperature, such as in electric motors mounted on engine blocks. Moreover, there is a need for acquiring data on temperature changes that can be stored and displayed in real-time. The aim of this research is to develop a basic prototype capable of measuring the temperature of the target object and displaying it directly, with the displayed data also being stored in a database. The hardware used for measurements in this study consists of an array of 36 NTC sensors, which are read by the ADC on each ESP-12K microcontroller. The measured data is sent from the microcontroller to the computer via serial communication in the form of voltage values, which are then converted into resistance and temperature values on the computer. For the temperature array visualization process, the author uses Python programming language and the Gaussian Interpolation method.

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