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Spektra: Jurnal Fisika dan Aplikasinya
ISSN 2541-3384 · Universitas Negeri Jakarta · 239 artikel di indeks
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Artikel Jurnal
Phase Dynamics in 3D Superconductors: Analysis Using the Sine-Gordon
This study investigates the phase dynamics of superconducting states in 3D superconductors using the sine-Gordon equation, with a focus on the interplay between the London penetration depth (LPD) and coherence length ( ). The research employs a combination of analytical modeling and simulation…
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Artikel Jurnal
Thickness Measurement and Sensitivity of Copper/Nickel Electroplating Results of Electrolyte Solution Temperature Variation
Currently, cryogenic thermometers are needed and one of the uses of cryogenic thermometers is to measure the temperature of food preservation flasks. Research has been conducted on the manufacture of cryogenic thermometers derived from Cu/Ni coils by electroplating process with temperature…
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Artikel Jurnal
Rainfall Classification Analysis Using Naïve Bayes Classifier Based on Air And Wind Temperatures in Serang City
The city of Serang experiences relatively high annual rainfall, with an average total of more than 100 mm/year. Based on data obtained from BMKG, Serang City, in 2023, there will be a shift in the rainy season due to weather anomalies, affecting the amount of rainfall. Apart from that, Serang City…
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Artikel Jurnal
Effect of 30˚C Electrolyte Temperature on The Sensitivity Cu/Ni
Given the necessity of cryogenic storage and monitoring cryogenic temperatures is equally important. This study aims to determine the resistance value and sensitivity of copper wire before and after electroplating at 30˚C electrolyte temperature as a low temperature sensor. The electrolyte solution…
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Artikel Jurnal
Impacts of Gorkha Earthquakes: A Comprehensive Study
Nepal is highly vulnerable to seismic activity. This review seeks to explore the impact of earthquakes on human populations in terms of casualties and injuries, as well as to pinpoint the risk factors associated with these outcomes. An earthquake measuring 7.8 on the Richter scale struck near…
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Artikel Jurnal
Synthesis Process and Nutritional Evaluation of Plantain as a Supplementary Food for Toddlers in Sierra Leone: A Study Utilizing Biuret’s, Benedict’s, and Iodine Solution Test
Research on developing plantain fruit into juice, jam, ice cream, and fritters as a food supplement for toddlers was conducted in Sierra Leone. The work was done at the Mosoudo section of Daru village, Jawie Chiefdom, in Kailahun District. Four bunches of plantains were harvested from Jawei…
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Artikel Jurnal
Exploring Weak Gravitational Lensing Effects by a Regular Black Hole
Gravitational lensing is one of the physical consequences of Einstein’s general theory of relativity, which has been observationally confirmed. This work aims to study the weak gravitational lensing scenario where the lens is a spherically symmetric, charged-nonsingular black hole that…
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Artikel Jurnal
Laser-Assisted Scattering with Screened Diatomic Potential
This study explores the differential cross section (DCS) for laser-assisted scattering of diatomic molecules, considering various polarization conditions (linear, circular, elliptical) and potential parameters. The primary objective is to understand how polarization, screening effects, and…
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Artikel Jurnal
Gravitational Lensing for A Spherically Symmetric Regular Charged Black Hole in Weak Field Limit
Gravitational lensing is an integral part of the study of general relativity, as it is one of the direct consequences of general relativity. The existence of singularity within the black hole due to gravitational collapse is one of the key properties of the black hole. However, the introduction of…
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Artikel Jurnal
Geochemical and Magnetic Suseptibility Analysis for Critical Minerals Detection in Igneous Rocks and Beach Sand
Critical minerals are an important natural resource that will continue to be necessary for modern industries. This study aims to determine the distribution of critical minerals based on geochemical data and magnetic susceptibility. Samples were taken from Lenggoksono beach, Southern Malang. The…
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Artikel Jurnal
Application of Variational Quantum Eigensolver for Ground State Energies Calculation in Hydrogen and Helium Atomic Sequences
Exponential scaling presents a significant challenge in electronic structure calculations performed on classical computers. This paper explores how quantum computer algorithms can accurately represent quantum systems. Variational Quantum Eigensolver (VQE) algorithm is used to compute the ground…
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Artikel Jurnal
Development of a Real-Time Gas Concentration Measurement System Using Internet of Things-Based Monitoring
Transportation and industrial activities have contributed to an increase in the concentration of pollutant gases such as CO, NO2, and SO2 in the air. High concentrations of these gases can adversely affect human health. One approach to addressing this issue is by measuring and monitoring gas…
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Artikel Jurnal
Seismometer Health Diagnosis Based on Cross Spectral Density Coherence Method in Indonesia Seismic Networks
Evaluation of seismometer health is crucial in accurately detecting earthquake and tsunami events. Currently, seismometer health evaluation is based solely on data quality unrelated to seismometer sensor performance. While seismometers are essential for tracking seismic activity, environmental…
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Artikel Jurnal
Pair Correlation Influence on Superconductors Josephson Penetration Depth
The Josephson penetration depth is an essential characteristic of Josephson junctions, serving a role akin to the London penetration depth in bulk superconductors. It originates from the substantial self-magnetic field generated by a strong Josephson supercurrent, influencing the distribution of…
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Artikel Jurnal
Enhanced Approaches to Gravitational Lensing: A Regular Charged Black Hole in Weak Field Limit
Gravitational lensing, an integral aspect of general relativity, profoundly impacts our understanding of black holes (BH’s). The presence of a centered singularity resulting from gravitational collapse is a fundamental characteristic of a BH. Nonetheless, the exploitation of non-linear…