Journal of the Korean Physical Society最新文献_第2页

Exploring the potential of FinFET transistor technology in reconfigurable logic gates for enhanced computing performance 探索 FinFET 晶体管技术在可重构逻辑门中的潜力，以提高计算性能

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-11-06 DOI: 10.1007/s40042-024-01213-5

Hamid Reza Heydari, Zahra Ahangari, Hamed Nematian, Kian Ebrahim Kafoori

{"title":"Exploring the potential of FinFET transistor technology in reconfigurable logic gates for enhanced computing performance","authors":"Hamid Reza Heydari, Zahra Ahangari, Hamed Nematian, Kian Ebrahim Kafoori","doi":"10.1007/s40042-024-01213-5","DOIUrl":"10.1007/s40042-024-01213-5","url":null,"abstract":"<div><p>Advanced logic gates and transistor technologies play a crucial role in the design of high-speed computing systems. In this paper, a novel 3-dimensional fin-shaped reconfigurable transistor is presented, which exhibits identical behavior in both n-enhancement mode and p-enhancement mode operations. The key highlight of this reconfigurable transistor lies in its ability to integrate XNOR, NOT, and AND gates within a single device. Unlike conventional reconfigurable transistors, the proposed device incorporates a dual-doped n<sup>+</sup>/p<sup>+</sup> source and a Schottky drain region. Notably, this device only requires a control gate, while the drain electrode serves the dual purpose of being the output and program gate. The findings demonstrate remarkable performance characteristics for the n-enhancement mode and p-enhancement mode operations. Specifically, the on-state current is measured to be 3.68 µA and 2.85 µA, with corresponding on/off current ratios of 11.25 × 10<sup>8</sup> and 1.23 × 10<sup>8</sup>, respectively. Moreover, the device achieves a subthreshold swing of 61 mV/dec and 63 mV/dec for the n-enhancement mode and p-enhancement mode, respectively. This innovative design highlights the potential of utilizing a single FinFET reconfigurable transistor to design complex logic gates, demonstrating a significant advancement in integrated circuit technology towards enhanced efficiency and versatility.</p></div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":"85 12","pages":"1032 - 1040"},"PeriodicalIF":0.8,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826262","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

An investigation on non-Darcian Williamson nanofluid flow stimulated by activation energy resulting from a slick elastic sheet encased in a porous medium

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-11-06 DOI: 10.1007/s40042-024-01212-6

Utpal Jyoti Das, Nayan Mani Majumdar

{"title":"An investigation on non-Darcian Williamson nanofluid flow stimulated by activation energy resulting from a slick elastic sheet encased in a porous medium","authors":"Utpal Jyoti Das, Nayan Mani Majumdar","doi":"10.1007/s40042-024-01212-6","DOIUrl":"10.1007/s40042-024-01212-6","url":null,"abstract":"<div><p>In this work, we explored the mass transfer characteristics of a non-Newtonian Williamson nanofluid flow resulting from a stretched sheet in response to various environmental factors such as chemical reactions, activation energy, non-Darcy porous medium, slip velocity, and viscous dissipation. The primary circumstance under study is one in which a Williamson nanofluid’s viscosity and thermal conductivity differ with temperature. An algorithmic solution to the anticipated problem is presented using the BVP4C method. Consequently, several plots have been generated to illustrate how different physical attributes that emerge in the issues impact concentration, temperature, and velocity profiles. It was found that the slip velocity assumption, magnetic field, activation energy, and the viscous dissipation phenomenon influenced the heat and mass transfer processes. Some key outcomes are: the slip velocity parameter and viscosity parameter reduce the velocity field; the slip velocity parameter and porosity parameter increase the temperature field; activation energy improves the concentration field; and chemical reaction decreases the concentration. There is a strong qualitative agreement between theoretical and numerical results.</p></div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":"85 12","pages":"984 - 995"},"PeriodicalIF":0.8,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826263","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

Passive error correction with a qubit-oscillator system in noisy environment

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-10-28 DOI: 10.1007/s40042-024-01216-2

Yanzhang Zhu, Myung-Joong Hwang

引用次数: 0

Development of a radioactive waste measurement system using arrayed NaI(Tl) detectors

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-10-22 DOI: 10.1007/s40042-024-01215-3

Guang Yang, Rui Shi, Zhou Wang, Xianguo Tuo

{"title":"Development of a radioactive waste measurement system using arrayed NaI(Tl) detectors","authors":"Guang Yang, Rui Shi, Zhou Wang, Xianguo Tuo","doi":"10.1007/s40042-024-01215-3","DOIUrl":"10.1007/s40042-024-01215-3","url":null,"abstract":"<div><p>The testing of radioactive waste drums is a fundamental aspect of nuclear waste disposal. To meet the need for rapid classification and measurement of radioactive wastes, we proposed a detection method based on array scintillation detectors to realize chromatographic gamma-scanning of casks of nuclear wastes. This method has been successfully developed and applied in the form of an array NaI(Tl) detector radioactive waste cask measurement system. The measurement system was divided into four main sections: (1) the radioactive source, (2) the mechanical and control system, (3) the detector system, and (4) the data processing system. The detector system comprises seven NaI(Tl) detectors, taking into account the detector layout, detection efficiency, and shielded room (to reduce the background of the environment). The results of the performance tests on the measurement system indicated that the detection limit was 6191.75 s<sup>−1</sup>, the energy resolution was 7.698% at 661.7 keV (<sup>137</sup>Cs), and the minimum detectable activity was 0.201 µCi for <sup>137</sup>Cs and 0.143 µCi for <sup>60</sup>Co. Finally, transmission measurements and image reconstruction of the three different media in the drum using a <sup>137</sup>Cs radioactive source could effectively reconstruct the spatial location distribution of the media in the drum.</p></div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":"85 11","pages":"883 - 889"},"PeriodicalIF":0.8,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142762042","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

Study of power-law activity distributions in a two-dimensional model system

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-10-22 DOI: 10.1007/s40042-024-01198-1

Myoung Won Cho

引用次数: 0

The lidar denoising algorithm based on an improved correlation parameter of ensemble empirical mode decomposition

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-10-22 DOI: 10.1007/s40042-024-01195-4

Zhuangbin Tan, Yan Zhang, Ziwen Sun, Jintao Chen, Kun Huang, Yuanjie Qi, Feifan Ma, Zhongxing Jiao

{"title":"The lidar denoising algorithm based on an improved correlation parameter of ensemble empirical mode decomposition","authors":"Zhuangbin Tan, Yan Zhang, Ziwen Sun, Jintao Chen, Kun Huang, Yuanjie Qi, Feifan Ma, Zhongxing Jiao","doi":"10.1007/s40042-024-01195-4","DOIUrl":"10.1007/s40042-024-01195-4","url":null,"abstract":"<div><p>Under the condition of weak signal of photon-counting lidar and strong noise of solar background, the signal is completely submerged by noise, resulting in the detection of multiple peaks through photon-counting entropy. Consequently, the distinction between signal and noise may become difficult, causing the significant fluctuation in ranging error. To address this issue, we propose the lidar denoising algorithm based on an improved correlation parameter of ensemble empirical mode decomposition, including the coarse denoising stage and recognition stage. In the coarse denoising stage, the method of ensemble empirical mode decomposition is primarily used for extracting and eliminating the noise components from the signal. To identify noise components, we propose an improved correlation parameter based on the combination of first-order linearity and second-order nonlinearity fitting using the least squares algorithm. In the recognition stage, the photon-counting entropy is further utilized for anti-noise and identifying the target signal. According to the simulation and experimental analysis, the ranging error of our proposed method are less than 5 and 30 cm, respectively. When compared with the denoising algorithm of photon-counting entropy, the average ranging accuracy is enhanced by 74.69% and 74.42%, respectively. Meanwhile, in comparison to other algorithms, it also possesses superior capabilities.</p></div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":"85 11","pages":"898 - 914"},"PeriodicalIF":0.8,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142762041","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

Improved electrical conductivity of graphene film using thermal expansion-assisted hot pressing method 利用热膨胀辅助热压法提高石墨烯薄膜的导电性

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-10-17 DOI: 10.1007/s40042-024-01184-7

Dongpyo Hong, Gun-Sik Park

{"title":"Improved electrical conductivity of graphene film using thermal expansion-assisted hot pressing method","authors":"Dongpyo Hong, Gun-Sik Park","doi":"10.1007/s40042-024-01184-7","DOIUrl":"10.1007/s40042-024-01184-7","url":null,"abstract":"<div><p>Achieving highly conductive graphene films requires the elimination of pores formed during the thermal reduction of graphene oxide (GO). Conventional methods such as hydraulic pressing often struggle to remove these pores effectively, especially in sub-micron large area films for uniform high pressure. In this study, we introduce a thermal expansion-assisted hot pressing (TEHP) technique that leverages the differential thermal expansion between graphite and tungsten to achieve pore-free, highly conductive graphene films. Here we heat the GO film sandwiched between graphite (high thermal expansion coefficient) and tungsten (low thermal expansion coefficient) to 1800 °C where pressures of 13–48 MPa are estimated. The TEHP resulted in graphene films with a smooth, metallic surface, free of macropores. Raman spectroscopy and electron microscopy analyses confirmed the enhanced crystallinity and compactness of the films. The electrical conductivity of the hot-pressed graphene films shows a threefold improvement over normally annealed films. This scalable method offers a viable pathway for producing high-performance graphene films for advanced applications.</p></div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":"85 10","pages":"830 - 837"},"PeriodicalIF":0.8,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142672363","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

A study on the effect of correlated data on predictive capabilities 相关数据对预测能力影响的研究

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-10-17 DOI: 10.1007/s40042-024-01197-2

Ui-Jung Hwang, Jeong-Eun Rah

{"title":"A study on the effect of correlated data on predictive capabilities","authors":"Ui-Jung Hwang, Jeong-Eun Rah","doi":"10.1007/s40042-024-01197-2","DOIUrl":"10.1007/s40042-024-01197-2","url":null,"abstract":"<div><p>The purpose of this study is to design a predictive model for a daily quality assurance (QA) system that remains unaffected by specific patterns in correlated time series data. All data were sampled from the measured output factor at specific times over a 5-year period during the daily QA process for a 6 MV photon beam of the Varian linear accelerator (LINAC) system. Before constructing predictive structures, an autocorrelation function (ACF) analysis was conducted to verify the correlation of the given time series data. This study determined the optimal configuration for the autoregressive integrated moving average (ARIMA) and nonlinear autoregressive (NAR) neural network models for prediction. Additionally, it utilized correlated time series data to evaluate its impact on the predictive capability. We then compared the actual QA values to those predicted by the selected ARIMA and NAR models for the sampled daily output. Our findings suggest that while the ARIMA model offers a quick and relatively easy approach without requiring complex computational methods, the NAR model outperforms ARIMA, especially in the context of correlated time series data, demonstrating its real clinical utility as a prediction model. This result reveals that correlations are frequently observed in daily QA data. We concluded that these correlations can substantially influence the accuracy of machine behavior predicted based on historical observations. Consequently, analyzing specific patterns and correlated data is imperative for designing predictive structures.</p></div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":"85 10","pages":"852 - 860"},"PeriodicalIF":0.8,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142672703","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 the correlation network in the US stock market during January 2020

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-10-17 DOI: 10.1007/s40042-024-01196-3

Doobae Jun, Seoyoung Oh, Gwangil Kim

{"title":"Analysis of the correlation network in the US stock market during January 2020","authors":"Doobae Jun, Seoyoung Oh, Gwangil Kim","doi":"10.1007/s40042-024-01196-3","DOIUrl":"10.1007/s40042-024-01196-3","url":null,"abstract":"<div><p>In January 2020, our study delved into the US stock market’s dynamics as COVID-19 began to affect the global economy. We scrutinized the Dow Jones Industrial Average (DJI) stocks, focusing on the correlations of their returns. We discerned patterns and anomalies through a structural and dynamic analysis of the correlation network facilitated by a distance function applied to the correlation coefficients. The study emphasized the significance of the minimum spanning tree (MST) in shaping the network’s structure and influencing the expansion of subnetworks. Central nodes with high connectivity in the MST emerged as crucial, particularly when the market exhibited abnormal behavior. These nodes’ daily variations and correlation structures provided insights into the market’s evolving nature. We observed that the MST’s radius was particularly reactive to market abnormalities, serving as a potential crisis indicator. Our analysis connected the alterations in the MST’s central nodes and the overall network structure with shifts in the four fundamental statistical moments of the correlation coefficients and distance weights. These elements proved to be instrumental in detecting and analyzing market irregularities.</p></div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":"85 11","pages":"942 - 953"},"PeriodicalIF":0.8,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142761771","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

Understanding the dynamics of feeding as a random walk on the feeding-rate axis

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-10-11 DOI: 10.1007/s40042-024-01193-6

Kyung Suk Lee

{"title":"Understanding the dynamics of feeding as a random walk on the feeding-rate axis","authors":"Kyung Suk Lee","doi":"10.1007/s40042-024-01193-6","DOIUrl":"10.1007/s40042-024-01193-6","url":null,"abstract":"<div><p>In animals, the presence of food stimulates appetite and induces feeding behaviors. This is an important mechanism, instrumental for animals’ competitiveness in fluctuating environment. To learn fundamental principles of feeding regulation, it is useful to study simple model organisms, whose feeding dynamics can be quantitatively measured. Recently, we measured the feeding dynamics of the nematode <i>C. elegans</i>, whose feeding consists of pumping bacteria from the environment into the gut, and demonstrated that it matches its feeding activity with the availability of food by modulating the frequency and duration of persistent fast pumping periods. Here, we develop an effective model that described these dynamics as a random walk on the pumping-rate axis, experiencing food-dependent transition probabilities. This model suggests the existence of two classes of fast pumping: the first is characterized by persistent fast-rate pumping, while the other exhibits only transient fast pumping. We show, however, that it is the dynamics of transient fast pumping that is governed by the presence of food. Furthermore, we use the model to show that serotonin is used by worms both in a food-independent mechanism that promotes acceleration of pumping and address the different roles of two pairs of serotonergic neurons.</p></div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":"85 11","pages":"954 - 959"},"PeriodicalIF":0.8,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142762035","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