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Journal of Physics: Theories and Applications
Published by Universitas Sebelas Maret
ISSN : 25497316     EISSN : 25497324     DOI : -
Core Subject : Science, Education,
Education Materials Science & Nanotechnology Physics
Journal of Physics: Theories and Applications (cited as J. Phys.: Theor. Appl.) is a peer-reviewed and open access journal, which is published twice a year by Physics Department, Sebelas Maret University. The journal is designed to serve researchers, developers, professionals, graduate students and other interested in theoretical and applied physics.
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Articles 64 Documents
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A systematic literature review on electromagnetic wave propagation challenges in 5G/6G mmWave and THz bands and emerging physics informed mitigation strategies Mutiara Putri; Diah Nurvita; Hamdi Akhsan
Journal of Physics: Theories and Applications Vol 10, No 1 (2026): Journal of Physics: Theories and Applications
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jphystheor-appl.v10i1.110534

Abstract

Basic physics governs the propagation of electromagnetic waves in the millimeter wave (mmWave: 24–100 GHz) and terahertz (THz: 0.1–10 THz) ranges, as well as Maxwell's equations, molecular resonance phenomena, and the dielectric response of materials. Although 5G and 6G systems utilize these high frequency ranges to achieve terabit per second data rates, their performance is inherently limited not by technical constraints, but by the intrinsic interaction of waves with matter. The main physical obstacles include atmospheric absorption due to water vapor, free space path loss that increases quadratically with frequency, and extremely shallow skin depth in common building and biological materials, making even thin barriers highly impervious to mmWave and THz signals. This paper provides a systematic literature review (SLR) that was carried out following the recommendation of PRISMA 2020 to synthesize physics grounded propagation challenges and mitigation strategies. From an initial collection of 46 Scopus indexed and peer reviewed articles published between 2020 and 2025, 20 high quality studies were selected for thematic synthesis based on a five-point methodological checklist. The study demonstrates that novel approaches like AI-based channel modeling cell-free Massive MIMO FeO₃ enriched building composites and Reconfigurable Intelligent Surfaces (RIS) strategically use wave interference tunable permeability and real-time environmental awareness to improve signal delivery rather than breaking the laws of physics. By bridging the conceptual divide between communications engineering and basic electromagnetics this study provides a cohesive physics framework that will direct future studies in 5G and 6G wireless systems.
Improvement of microstructures and dielectric properties of coprecipitation iron (Fe)-doped barium titanate Muazaroh Nur Azizah; Dianisa Khoirum Sandi; Khairuddin Khairuddin; Fahru Nurosyid; Trya Andini; Yofentina Iriani
Journal of Physics: Theories and Applications Vol 10, No 1 (2026): Journal of Physics: Theories and Applications
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jphystheor-appl.v10i1.108005

Abstract

Barium titanate (BaTiO3 or BTO) is a famous lead-free ferroelectric material often studied due to its fascinating features for technological applications. However, its performance requires continuous enhancement, one approach being doping with iron (Fe). This study aimed to demonstrate the improvement in the microstructures and dielectric properties of barium titanate induced by iron doping. The barium titanate and iron-doped barium titanate with the formula of BaTi1-xFexO3 (x = 0, 0.01, 0.03, and 0.05) were synthesized using the coprecipitation technique. X-ray diffraction (XRD) analysis confirmed the formation of a pure tetragonal phase in all samples, while Fourier-transform infrared (FTIR) spectroscopy revealed characteristic BTO absorption bands at around 500 cm−1. Compared with pure BTO, Fe-doped samples exhibited increased lattice constants, crystallite sizes, densities, and dielectric constants. Further, the dielectric constants of the samples were also higher than those of undoped barium titanate. These results indicate that Fe doping enhances the microstructures of BTO, leading to improved dielectric performance.
IoT implementation in systems spraying pheromones pineapple skin for control integrated bee horn coconut palm oil Irvana Dima Saputra; Shabri Putra Wirman; Neneng Fitria; Diana Putrianti
Journal of Physics: Theories and Applications Vol 10, No 1 (2026): Journal of Physics: Theories and Applications
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jphystheor-appl.v10i1.117065

Abstract

This study presents the design and evaluation of an Internet of Things (IoT)-based automated pheromone spraying system for the control of Oryctes rhinoceros in oil palm plantations. The proposed system integrates a microcontroller with an infrared sensor, a load cell, a real-time clock (RTC), a GSM communication module, and an ultrasonic mist generator to support real-time monitoring and automated pheromone release. Experimental procedures included component validation and field testing conducted over a seven-day period. The results demonstrate that the infrared sensor achieved a detection accuracy of 100% under low-light conditions, while the load cell showed a coefficient of variation of approximately 2%, indicating high measurement precision. The GSM module was capable of transmitting data with delays ranging from 0 to 51 seconds over a communication range of up to 5 km. Field evaluation further revealed that the trap positioned at a height of 2.5 meters yielded the highest capture rate of rhinoceros beetles compared to other configurations. Overall, the findings indicate that the developed system is reliable, energy-efficient, and applicable for sustainable pest management in oil palm plantations.
Analytical investigation of spin-orbit interaction effect on Hulthen potential model using perturbation theory Edet Asuquo Thompson; Samuel Inyang
Journal of Physics: Theories and Applications Vol 10, No 1 (2026): Journal of Physics: Theories and Applications
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jphystheor-appl.v10i1.114129

Abstract

Abstract: This study investigates the effect of Spin-Orbit interaction on Hulthén potential model within the non-relativistic quantum mechanical domain. The Schrödinger equation is solved for a particle with spin degree of freedom moving in a central force field modelled by the Hulthén potential. The Spin-Orbit interaction is viewed as a form of perturbation. Hence the perturbation theory is applied to correct the energy eigenvalues of the Hulthén system, thereby revealing the effect of Spin-Orbit effect. The results of this study shows that the energy levels of the Hulthén potential splits according to the j = ℓ ± 1⁄2 scheme except for ℓ = 0. This makes the Hulthén potential model suitable for a system with spin degree of freedom within the non-relativistic quantum mechanics. Also, Schrödinger equation which is apt for a spinless particle can be applied to study a system with spin degree of freedom by treating the Spin-Orbit interaction as a form of perturbation.

Page 7 of 7 | Total Record : 64

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