Journal of the Korean Physical Society最新文献_第9页

A study of machine-learning-derived formulas using artificially generated dataset 利用人工生成的数据集研究机器学习得出的公式

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-05-30 DOI: 10.1007/s40042-024-01103-w

Donggeon Lee, Sooran Kim

{"title":"A study of machine-learning-derived formulas using artificially generated dataset","authors":"Donggeon Lee, Sooran Kim","doi":"10.1007/s40042-024-01103-w","DOIUrl":"10.1007/s40042-024-01103-w","url":null,"abstract":"<div>In this study, we investigate the effectiveness of machine learning (ML) models in constructing empirical formulas for the superconducting transition temperature (Tc) by comparing ML-derived equations with McMillan’s equation. We utilized artificially generated data with a size of 10,000 from McMillan’s equation and employed the parametric brute force searching (BFS) algorithm to search for model equations varying model complexity and dataset size. The BFS models with features of the Debye temperature and electron–phonon coupling exhibit the RMSE of 0.830 K and R2 of 0.976 even with a small dataset size of 100. The ML-derived formula is also close to McMillan’s equation showing a linear relationship between the Debye temperature and Tc, as well as a cubic relationship between electron–phonon coupling and Tc. Furthermore, we analyzed feature contributions using non-parametric random forest (RF) regression and found the strong relevance of electron–phonon coupling on Tc. Our results demonstrate the importance of feature selection and model complexity in effectively predicting Tc rather than simply adding more data.</div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141198257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of iodine doping on structural and electrical characteristics of solution-processed indium oxide thin-film transistors and its potential application for iodine sensing 碘掺杂对溶液加工氧化铟薄膜晶体管结构和电气特性的影响及其在碘传感中的潜在应用

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-05-30 DOI: 10.1007/s40042-024-01099-3

Junhao Feng, Ji-Hoon Choi, Xue Zhang, Jaehoon Park, Jin-Hyuk Bae

{"title":"Effects of iodine doping on structural and electrical characteristics of solution-processed indium oxide thin-film transistors and its potential application for iodine sensing","authors":"Junhao Feng, Ji-Hoon Choi, Xue Zhang, Jaehoon Park, Jin-Hyuk Bae","doi":"10.1007/s40042-024-01099-3","DOIUrl":"10.1007/s40042-024-01099-3","url":null,"abstract":"<div>This study investigated the influence of solution-processed indium oxide (In2O3) thin-film transistors (TFTs) with various iodine vapor (I2) doping times. Prolonged iodine doping time is found to induce some important changes in the devices: (i) increase in In2O3 film thickness and nanoparticle size; (ii) decrease in the metal-hydroxyl bonding and increase in the metal–oxygen bonding; (iii) the positive moved threshold voltage, lower field-effect mobility, and higher on/off current ratio from 0 s (sec) to 10 s. Furthermore, vacuum thermal treatment, as a facial, novel method to recover the electrical performances of I2-doped In2O3 TFTs was examined. I2-doped In2O3 TFTs for 10 s with vacuum thermal treatment at 200 ℃ exhibited excellent recovery properties of electrical. The results indicate that iodine doping can change the electrical properties of In2O3 TFTs and could potentially be used for I2 gas sensor.</div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141196865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of wetting properties of microstructured polymer surfaces to achieve superhydrophobic properties 分析微结构聚合物表面的润湿特性以实现超疏水特性

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-05-29 DOI: 10.1007/s40042-024-01098-4

Ji Seong Choi, Min Bae, Seong Min Kang

引用次数: 0

Yang–Mills field strength and classical trajectories of electrons in Rashba spin–orbit-coupled systems 杨-米尔斯场强与拉什巴自旋轨道耦合系统中电子的经典轨迹

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-05-29 DOI: 10.1007/s40042-024-01073-z

Jinki Hong, Hyoungtae Kim, Sangsu Kim

引用次数: 0

Design and simulation of planar microwave sensor for food industry 食品工业平面微波传感器的设计与模拟

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-05-28 DOI: 10.1007/s40042-024-01097-5

Kalindi S. Shinde, Shweta N. Shah, Piyush N. Patel

{"title":"Design and simulation of planar microwave sensor for food industry","authors":"Kalindi S. Shinde, Shweta N. Shah, Piyush N. Patel","doi":"10.1007/s40042-024-01097-5","DOIUrl":"10.1007/s40042-024-01097-5","url":null,"abstract":"<div>Microwave sensor technology has transformed the food sector by providing fast and non-destructive methods to check food quality parameters. The present research provides a detailed investigation of the design and simulation of a flat microwave sensor specifically customized for use in the food industry. Initially, a thorough literature survey on the development of a robust and reusable ring resonator Sensor is performed for the Microwave frequency of L (1–2 GHz) and S (2–4 GHZ) bands. Then, the simulation of the microwave planar sensor with the different geometry and dimensions was done and dimensions were finalized having a maximum Return loss of − 20.177 dB at 2.377 GHz. Further, the structure was simulated on an FR4 with a Cu thickness of 0.4 mm and 1.6 mm substrate height. These simulations were performed to observe the change of resonant frequency by changing the material with their varied dielectric permittivity from 1 to 33.4 for varied food samples. Later, by conducting an electromagnetic performance analysis, the dielectric characteristics of different food samples are examined, providing insight into the sensor’s effectiveness in detecting electromagnetic signals. The sensor’s precision in detecting minute changes in food attributes is highlighted by sensitivity and accuracy assessments, establishing it as a promising tool for real-time monitoring and quality control. Finally, the limitations of the study and the scope for future research are explained, which are crucial for driving innovation in sensor technology across various industrial domains.</div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141165626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Shallow-donor impurity states in type-II InGaN-ZnSnN2/GaN quantum wells under hydrostatic pressure effect 静水压效应下 II 型 InGaN-ZnSnN2/GaN 量子阱中的浅捐献杂质态

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-05-28 DOI: 10.1007/s40042-024-01095-7

Guang-Xin Wang, Xiu-Zhi Duan

{"title":"Shallow-donor impurity states in type-II InGaN-ZnSnN2/GaN quantum wells under hydrostatic pressure effect","authors":"Guang-Xin Wang, Xiu-Zhi Duan","doi":"10.1007/s40042-024-01095-7","DOIUrl":"10.1007/s40042-024-01095-7","url":null,"abstract":"<div>Taking into account the built-in electric field (BEF) effect, shallow-donor impurity (SDI) states in a strained type-II InGaN-ZnSnN2/GaN quantum well (QW) are investigated variationally under hydrostatic pressure. Numerical results reveal that the SDI binding energy and BEF strengths of different well and barrier layers depend on hydrostatic pressure and structural parameters of the type-II QW. The BEF strengths in left and right wells, middle barrier, and barriers on both sides are proportional to the hydrostatic pressure. Meantime, the BEF strengths in well and/or middle barrier layers (barriers on both sides) decrease (increase) linearly with increasing the width of the well and/or middle barrier layers (barriers on both sides). The binding energy displays a maximum value as the well width decreases, and it increases linearly (decreases gradually) with the increment in hydrostatic pressure (middle barrier thickness). Moreover, the position of an impurity ion has a significant impact on the SDI binding energy. It is hoped that the obtained results will be helpful in improving the physical performance of tunable type-II InGaN-ZnSnN2/GaN quantum wells (QWs) optical devices.</div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141165625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Erratum: Structural, elastic, optic, and electronic properties of strontium oxide under pressure studied by first-principles calculations 更正：通过第一原理计算研究压力下氧化锶的结构、弹性、光学和电子特性

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-05-24 DOI: 10.1007/s40042-024-01096-6

A. Kermezli, S. Haireche, M. Hassane, M. Bouchenafa, M. Elbaa

引用次数: 0

Influence of electrothermopolarization process on the structure and properties of nanocomposites based on high-density polyethylene and HfO2 nanoparticles 电热极化过程对基于高密度聚乙烯和 HfO2 纳米粒子的纳米复合材料的结构和性能的影响

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-05-21 DOI: 10.1007/s40042-024-01094-8

Aybaniz Sabir Huseynova, Rovnaq Mirza Rzayev, Flora Vidadi Hajiyeva

{"title":"Influence of electrothermopolarization process on the structure and properties of nanocomposites based on high-density polyethylene and HfO2 nanoparticles","authors":"Aybaniz Sabir Huseynova, Rovnaq Mirza Rzayev, Flora Vidadi Hajiyeva","doi":"10.1007/s40042-024-01094-8","DOIUrl":"10.1007/s40042-024-01094-8","url":null,"abstract":"<div>The effect of electrothermopolarization (ETP) on the structure and electrophysical properties (electret, dielectric) of polymer nanocomposites based on HDPE and hafnium oxide nanoparticles has been studied. The possibility of significant change in dielectric properties of HDPE/HfO2 polymer nanocomposites at 3–7% nanoparticle concentration has been confirmed. The interactions of the polymer and nanoparticles are considered and the results of changes in the structure of HDPE/HfO2 polymer nanocomposite in its volume and interphase zone before and after electrothermopolarization are presented. Spectroscopic studies of nanocomposites show that the introduction of nanoparticles is compatible in the presence of polyethylene. Results acquired via an optical microscope with magnification revealed that the nanocomposite HDPE/HfO2 had a variety of morphology from oval, spherical, polygon, to irregular shapes depending on their snitches HDPE and HfO2. HfO2 affects the structure of the nanocomposites, which is observed by SEM, AFM, DSC and confirmed by infrared spectroscopy (FTIR).</div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141148927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Feasibility study of the shorter focusing lattice for soft X-ray undulator line at PAL-XFEL PAL-XFEL 软 X 射线起爆线较短聚焦晶格的可行性研究

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-05-21 DOI: 10.1007/s40042-024-01087-7

Kook-Jin Moon, Inhyuk Nam, Chi Hyun Shim

{"title":"Feasibility study of the shorter focusing lattice for soft X-ray undulator line at PAL-XFEL","authors":"Kook-Jin Moon, Inhyuk Nam, Chi Hyun Shim","doi":"10.1007/s40042-024-01087-7","DOIUrl":"10.1007/s40042-024-01087-7","url":null,"abstract":"<div>At Pohang Accelerator Laboratory X-ray Free Electron Laser (PAL-XFEL), there is an ongoing consideration of employing elliptically polarizing undulators throughout the entire undulator line to enable polarization control in the soft X-ray undulator line. To utilize the elliptically polarizing undulators, the shorter focusing lattice for soft X-ray undulator line at PAL-XFEL is proposed. The FEL performance of the shorter focusing lattice is estimated by using Ming Xie’s fitting formula and is compared with the current focusing lattice. Due to the increased need for intersections in the shorter focusing lattice, there is a challenge where the effective length of the undulator becomes shorter compared to the current focusing lattice within the same length of the undulator line. Therefore, the use of quadrupoles employed in the hard X-ray undulator line at PAL-XFEL has also been taken into consideration to overcome the reduced effective length of the undulator by increasing the betatron phase advance. Based on the time-dependent FEL simulation results, it can be confirmed that the proposed shorter focusing lattice is sufficiently feasible without compromising FEL performance.</div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141114670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exact solutions to Ernst-like equation in (2+2) Hamiltonian reduction (2+2) 哈密顿还原中的恩斯特方程的精确解

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-05-21 DOI: 10.1007/s40042-024-01060-4

Jong Hyuk Yoon, Yeongji Kim, Seung Hun Oh

{"title":"Exact solutions to Ernst-like equation in (2+2) Hamiltonian reduction","authors":"Jong Hyuk Yoon, Yeongji Kim, Seung Hun Oh","doi":"10.1007/s40042-024-01060-4","DOIUrl":"10.1007/s40042-024-01060-4","url":null,"abstract":"<div>We apply the method of Hamiltonian reduction without isometry as a way to find exact solutions to Einstein’s equations. To find exact solutions, we introduce two spatial Killing vector fields to the Einstein’s equations obtained through the Hamiltonian reduction, and derive the Ernst-like equation in the privileged coordinates. By solving the Ernst-like equation, we found a four-parameter family of exact solutions, one of which is interpreted as a deformation of the general Kasner spacetime. We extend our method to spacetimes where two independent gravitational degrees of freedom co-exist and interact with each other, and obtain a set of two partial differential equations satisfied by them. If we substitute a pre-fixed diagonal mode into these equations, and then the equations reduce to a single non-linear partial differential equation, which is interpreted as the equation of non-diagonal mode of gravitational waves propagating on the “background” spacetime determined by the diagonal mode. We choose three simplest “background” spacetimes, and discuss the corresponding non-diagonal modes in each case.</div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141114262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0