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arXiv 2024年

作者： Ruzayqat, Hamza Knio, Omar Applied Mathematics and Computational Science Program Computer Electrical and Mathematical Sciences and Engineering Division King Abdullah University of Science and Technology Thuwal23955-6900 Saudi Arabia

This paper presents a new data assimilation (DA) scheme based on a sequential Markov Chain Monte Carlo (SMCMC) DA technique [36] which is provably convergent and has been recently used for filtering, particularly for high-dimensional non-linear, and potentially, non-Gaussian state-space models. Unlike particle filters, which can be considered exact methods and can be used for filtering non-linear, non-Gaussian models, SMCMC does not assign weights to the samples/particles, and therefore, the method does not suffer from the issue of weight-degeneracy when a relatively small number of samples is used. We design a localization approach within the SMCMC framework that focuses on regions where observations are located and restricts the transition densities included in the filtering distribution of the state to these regions. This results in immensely reducing the effective degrees of freedom and thus improving the efficiency. We test the new technique on high-dimensional (d ∼ 104 − 105) linear Gaussian model and non-linear shallow water models with Gaussian noise with real and synthetic observations. For two of the numerical examples, the observations mimic the data generated by the Surface Water and Ocean Topography (SWOT) mission led by NASA, which is a swath of ocean height observations that changes location at every assimilation time step. We also use a set of ocean drifters' real observations in which the drifters are moving according the ocean kinematics and assumed to have uncertain locations at the time of assimilation. We show that when higher accuracy is required, the proposed algorithm is superior in terms of efficiency and accuracy over competing ensemble methods and the original SMCMC *** Codes 62M20, 60G35, 60J20, 94A12, 93E11, 65C40 © 2024, CC BY.

关键词： Markov chains

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Neuroprotective effect of quercetin through targeting key genes involved in aluminum chloride induced Alzheimer’s disease in rats

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Egyptian Journal of Basic and applied sciences 2023年第1期10卷 174-184页

作者： Elreedy, Hala A Elfiky, Asmaa M. Mahmoud, Asmaa Ahmed Ibrahim, Khadiga S. Ghazy, Mohamed A Environmental and Occupational Medicine Department Environment and Climate Change Research Institute National Research Centre Cairo Egypt Department of Zoology Faculty of Science Ain Shams University Cairo Egypt Biotechnology Program Basic and Applied Science Institute Egypt-Japan University of Science and Technology Alexandria New Borg El-Arab City Egypt Department of Biochemistry Faculty of Science Ain Shams University Cairo Egypt

Alzheimer’s disease (AD) is a neurodegenerative disorder that is clinically characterized by deteriorating cognitive function. Quercetin (Q), a bioflavonoid, has been reported to slow down AD progression. Q at a dose of 50 mg/kg-1 shows an important therapeutic effect in aluminum chloride (AlCl₃)-induced Alzheimer’s disease, which has been previously published by us. Here, this study aimed to highlight the neuroprotective effect of quercetin on hallmark genes in AlCl₃-induced Alzheimer’s disease in rats. Wistar male rats were subjected to a vehicle group, AlCl₃ group, and co-administration with AlCl₃ + Q50 for 60 sequential days. Behavioral tests and qPCR were performed to assess the efficacy of Q. The co-administration of quercetin (50 mg kg-1) has a significant effect on memory deficits. Furthermore, AlCl₃ + Q50 group resulted in significantly decreased amyloid precursor protein levels (APP), β-amyloid converting enzyme 1 (BACE1), and presenilin I (PSEN1) and increased the expression of ADAM17 in the hippocampus tissue compared to AlCl₃ group (p < 0.05). The current study showed that the quercetin’s neuroprotective properties may involve its ability to target the most significant Alzheimer’s disease-related genes and slow the progression of cognitive impairment. © 2023 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.

关键词： ADAM17 AlCl3 Alzheimer disease amyloid precursor protein presenilin I quercetin

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Enhanced fast charging capabilities in natural graphite/iron cross-linked pectin electrodes for lithium-ion batteries

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Materials Advances 2024年第17期5卷 6820-6829页

作者： Chung, Chin-Yi Chen, Wei-Ming Chen, Yan-Ruei Chen, Liang-Yu Su, Yu-Hsuan Chi, Po-Wei Wu, Phillip M. Chang-Liao, Kuei-Shu Tang, Hong-Yi Wu, Maw-Kuen Institute of Physics Academia Sinica 128 Section 2 Academia Road Taipei11529 Taiwan Nano Science and Technology Program Taiwan International Graduate Program Academia Sinica and National Tsing Hua University 128 Section 2 Academia Road Taipei11529 Taiwan Department of Engineering and System Science National Tsing Hua University 101 Section 2 Kuang-Fu Road Hsinchu300044 Taiwan College of Science National Chung Hsing University 145 Xingda Road South District Taichung402 Taiwan Department of Applied Chemistry National Chi-Nan University 1 University Road Puli Nantou545301 Taiwan

Rapid charging capabilities are required for the broader adoption of lithium-ion batteries in emerging technologies such as electric vehicles. Although commercial graphite anodes provide a high energy density, their limitations in quick charging warrant the exploration of novel materials. This study extends prior research on the use of pectin, a natural polysaccharide, as an organic binder for graphite anodes. By introducing iron into pectin, we propose a unique ion-crosslinking mechanism that causes the graphite anode to exhibit pseudocapacitive Li storage. Our findings, corroborated by 3D Bode analysis and AC impedance spectra, revealed a positive correlation between the iron ion and the pseudocapacitive vertex in the graphite reaction. Compared with conventional binders, graphite electrodes utilizing iron-doped pectin demonstrated superior initial and stable capacities, reaching 450 mA h g−1 after 100 cycles at 1C. This study highlights the synergistic effect of pectin and iron ions, offering a new avenue for high-performance, rapid-charging, and environmentally sustainable lithium-ion batteries. © 2024 RSC.

关键词： Lithium-ion batteries

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Estimation of aboveground biomass of arboreal species in the semi-arid region of Brazil using SAR(synthetic aperture radar)images

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Journal of Arid Land 2023年第6期15卷 695-709页

作者： Janisson B de JESUS Tatiana M KUPLICH Íkaro D de C BARRETO Fernando L HILLEBRAND Cristiano N da ROSA Postgraduate Program in Remote Sensing Federal University of Rio Grande do SulCampus ValePorto Alegre 91501970Brazil National Institute for Space Research(INPE) COESU(Southern Spatial Coordination)Santa Maria 97105970Brazil Postgraduate Program Biometry and Applied Statistics Rural Federal University of PernambucoRecife 52171900Brazil Federal Institute of Education Science and Technology of Rio Grande do Sul(IFRS)Campus RolanteRolante 95690000Brazil Postgraduate Program in Remote Sensing Polar and Climate CenterFederal University of Rio Grande do SulPorto Alegre 91501970Brazil

The Caatinga biome is an important ecosystem in the semi-arid region of *** has significantly degraded due to human activities and is currently a region undergoing ***,monitoring the variation in the Caatinga biome has become essential for its sustainable ***,traditional methods for estimating aboveground biomass(AGB)are time-consuming and *** sensing,such as optical and radar imaging,can estimate and correlate with ***,radar imaging is still a novelty to be applied in estimating the AGB of this biome,which is an area with little ***,this study aimed to use Sentinel-1 images to estimate the AGB of the Caatinga biome in Sergipe State(northeastern Brazil)and to verify its influencing *** sample plots(30 m×30 m)were selected,and the stems of individuals with a circumference at breast height(1.3 m above the ground)equal to or greater than 6.0 cm were measured,and the AGB through an allometric equation was *** Sentinel-1 images from 3 different periods(green,intermediate,and dry periods)were used to consider the phenological conditions of the Caatinga *** the pre-processing and extraction of attributes(co-polarized VV(vertical transmit and vertical receive),cross-polarized VH(vertical transmit and horizontal receive),and band ratio VH/VV backscatter,radar vegetation index,dual polarization synthetic aperture radar(SAR)vegetation index(DPSVI),entropy(H),and alpha angle(α))were performed with Sentinel’s Application *** attributes were used to estimate the AGB through simple and multiple linear regressions and evaluated by the coefficients of determination(R2),correlation(r),and root mean squared error(RMSE).The results showed that the attributes individually had little ability to estimate the AGB of the Caatinga biome in the three *** with multiple regression,we found that the intermediate period presented the equation with the best

关键词： Caatinga tropical dry forest coherent and incoherent attributes C-band Sentinel-1

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Relative magnetic field and slipping effect on Casson dusty fluid of two phase fluctuating flow over inclined parallel plate

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South African Journal of Chemical Engineering 2023年 44卷 135-146页

作者： khan, Dolat Kumam, Poom Kumam, Wiyada Suttiarporn, Panawan Rehman, Ali Fixed Point Research Laboratory Fixed Point Theory and Applications Research Group Center of Excellence in Theoretical and Computational Science (TaCS-CoE) Faculty of Science King Mongkut's University of Technology Thonburi (KMUTT) 126 Pracha Uthit Rd. Bang Mod Bangkok Thung Khru 10140 Thailand Center of Excellence in Theoretical and Computational Science (TaCS-CoE) Faculty of Science King Mongkut's University of Technology Thonburi (KMUTT) 126 Pracha Uthit Rd. Bang Mod Bangkok Thung Khru 10140 Thailand Applied Mathematics for Science and Engineering Research Unit (AMSERU) Program in Applied Statistics Department of Mathematics and Computer Science Faculty of Science and Technology Rajamangala University of Technology Thanyaburi (RMUTT) Pathum Thani 12110 Thailand Faculty of Science Energy and Environment King Mongkut's University of Technology North Bangkok Rayong Campus Rayong 21120 Thailand Special Interest Group for Modelling and Data Analytics Faculty of Ocean Engineering Technology and Informatics Universiti Malaysia Terengganu Terengganu Kuala Nerus 21030 Malaysia

Due to its significant applications in magnetic devices for cell separation, magnetic drugs for cancer tumor treatment, blood flow adjustment during surgery, magnetic endoscopy, and fluid pumping in industrial and engineering processes, magnetohydrodynamics (MHD) has a wide range of applications. Therefore, the aim of this study to investigate the Relative Magnetic Field and slipping effect on Casson dusty fluid of two-phase fluctuating flow over inclined parallel plate. More exactly, the relative magnetic phenomena are fixed relatively to the plate (MFFRP) or fixed relatively to the fluid (MFFRF). The mathematical modeling was established as the set of partial differential equations for dusty Casson fluid. Buckingham's pi theorem is used to find out the dimensionless variables, to make our system dimensionless. The solution in perturb form is to find out by incorporating Poincare–Lighthill perturbation technique (PLPT). To know in-depth different parameters the graphical results for both velocities are plotted with the help of software Mathcad- 15. It is clearly detected that the relative magnetic field performs a vital part in the fluid as well as particle motion. Moreover, the relative magnetic field play a vital role in the decreasing of skin friction of both plates. © 2023

关键词： Brinkman fluid Dust particles Fluctuating vertical plate Inclined relative magnetic field PLPT

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Boosting the electrical output of cement-based triboelectric nanogenerator by surface treatment technique 18

Boosting the electrical output of cement-based triboelectric...

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18th Siam Physics Congress, SPC 2023

作者： Kaewsrithong, Kanisorn Kaewpoonsuk, Anucha Torkittikul, Pincha Wongkeo, Watcharapong Chaipanich, Arnon Rianyoi, Rattiyakorn Nochaiya, Thanongsak Department of Physic Faculty of Science Naresuan University Phitsanulok65000 Thailand Research Center for Academic Excellence in Applied Physics Naresuan University Phitsanulok65000 Thailand Department of Civil Technology Faculty of Industrial Technology Lampang Rajabhat University Lampang52100 Thailand Physics and General Science Program Faculty of Science and Technology Nakhon Ratchasima Rajabhat University Nakhon Ratchasima30000 Thailand Department of Physics and Materials Science Faculty of Science Chiang Mai University Chiang Mai50200 Thailand Center of Excellence in Materials Science and Technology Chiang Mai University Chiang Mai50200 Thailand

Triboelectric nanogenerators have the potential to convert mechanical energy to electric energy through electrostatic induction thus they are promising alternative cleaning energy sources for human beings. The objective of this work is to increase the electrical outputs of cement-based triboelectric nanogenerators (C-TENGs) by using a surface polishing treatment technique. The hand-mixed cement pastes with water-to-cement ratios of 0.3, 0.4, and 0.5 by weight were cast in the molds and cured in saturated lime water. A study was conducted to investigate the electrical output, which included voltage and current, under a single vertical contract-separation mode with a constant force and a frequency of 3 Hz. To improve the electrical generating performance, all samples were subjected to a surface treatment by polishing with sandpaper. After electrical investigations, the electrical outputs were remeasured. The results showed that the modified surface samples have significantly higher electrical outputs than that of the pristine sample due to the increased contact surface area. Moreover, the cement paste with a water-to-cement ratio of 0.3 after a polished-surface treatment exhibits the highest power density for an external resistance of 10 MΩ, improving around 70% higher than the pristine sample. The study successfully presents a low-cost and simple technique for improving the performance of cement-based triboelectric nanogenerators. © 2023 Institute of Physics Publishing. All rights reserved.

关键词： Cements

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Teacher development in robot and IoT knowledge, skills, and attitudes with the use of the TPACK-based Support-Stimulate-Seek approach

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Interactive Learning Environments 2023年第9期31卷 5811-5830页

作者： Hu, Chih-Chien Yeh, Hui-Chin Chen, Nian-Shing Department of Information Management Tatung University Taipei City Taiwan Department of Applied Foreign Languages National Yunlin University of Science and Technology Yunlin Douliou Taiwan Institute for Research Excellence in Learning Sciences Program of Learning Sciences National Taiwan Normal University Taipei City Taiwan

In-service teachers’ professional development regarding technology adoption in education is often focused on only one specific technology. To maximize the utilization of technologies, teachers need to be able to leverage different technologies seamlessly. Technological Pedagogical Content Knowledge (TPACK) is one of the most important frameworks depicting teachers’ competences for effectively teaching with technology. The TPACK Support-Stimulate-Seek model (3S-TPACK) was used to design training programs with learning activities using robots, IoT-based sensors, actuators, tablets, and computer programming tools. The results show that the training programs designed by adapting the 3S-TPACK model not only can improve the teachers’ learning outcomes but also can support positive attitudes toward adopting robots and IoT technologies in the teaching and learning process. © 2022 Informa UK Limited, trading as Taylor & Francis Group.

关键词： 21st century abilities interdisciplinary projects Teacher education teacher professional development technological pedagogical content knowledge technology in education

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Pathogen inhibition and indication by gelatin nonwoven mats with incorporation of polyphenol derivatives

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RSC Advances 2023年第45期13卷 31602-31615页

作者： Bai, By Meng-Yi Wang, Ting-Teng Chen, Xin-An Wu, Chia-Chun Graduate Institute of Biomedical Engineering and Biomedical Engineering Program Graduate Institute of Applied Science and Technology National Taiwan University of Science and Technology TR-917 AAEON Building No. 43 Keelung Rd. Sec. 4 Da'an Dist. Taiwan Taipei City10607 Taiwan Adjunct Appointment to the National Defense Medical Center Taiwan Taipei11490 Taiwan Institute of Prevention Medicine National Defense Medical Center Taiwan Taipei11490 Taiwan

There is a need for non-pharmaceutical intervention methods that can prevent and indicate the risk of airborne disease spread. In this study, we developed a nonwoven mat based on the polyphenol gallic acid, which can inhibit pathogens growth and also indicate pathogen levels in the surrounding environment. Using nuclear magnetic resonance, Fourier-transform infrared spectroscopy, and high-performance liquid chromatography, we characterized this novel gelatin-based nonwoven mat and investigated the mechanism governing its ability to indicate pathogen levels. We demonstrated that the incorporation of gallic acid serves a vital role in indicating the presence of bacteria, causing the nonwoven mat to change in color from white to brown. We have proposed a plausible mechanism for this color change behavior based on a reaction of gallic acid with components excreted by bacteria, including glutamate, valine, and leucine. The concentrations of these components reflect the bacterial counts, enabling a real-time indication of pathogen levels in the surrounding air. In summary, the nonwoven mat presented herein can serve as an excellent antibacterial agent and as an indicator of nearby bacteria for fabricating personal protection equipment like filtration mask. © 2023 The Royal Society of Chemistry.

关键词： Bacteria

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Shape-based proximity effect correction method for throughput, fidelity, and contrast enhancement of electron-beam writer

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applied Physics Express 2023年第1期16卷 011001-011001页

作者： Liu, Chun-Hung Ding, Ze-An Wang, Shun-Ping Interdisciplinary Program of Green and Information Technology National Taitung University Taitung Taiwan Department of Applied Science National Taitung University Taitung Taiwan

Conventional shape-based proximity effect correction (PEC) methods can only improve pattern fidelity and present a risk to correction effectiveness under severe resist-contour distortions for electron-beam writers. Herein, a shape-based PEC method for effectively improving both the pattern fidelity and energy slope without the risk in realizing high throughput, fidelity, and contrast is presented. An extra-framed pattern added to the target pattern is optimized to achieve better trade-off between contrast improvement and writing-time reduction. The proposed method demonstrated significant improvements in lithographic performance compared with the conventional and dose-based PEC methods for high-numerical-aperture extreme-ultraviolet mask and aggressive patterns. © 2023 The Japan Society of applied Physics

关键词： Electron beams

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Potentials of bioethanol production from sunflower stalks: value-adding agricultural waste for commercial use

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Biomass Conversion and Biorefinery 2024年第11期14卷 11799-11811页

作者： Taechawatchananont, Nopmallee Manmai, Numchok Pakeechai, Kanokporn Unpaprom, Yuwalee Ramaraj, Rameshprabu Liao, Shu-Yi Department of Applied Economics National Chung Hsing University Taichung402 Taiwan Department of Forestry National Chung Hsing University Taichung402 Taiwan School of Renewable Energy Maejo University Chiang Mai50290 Thailand Department of Finance and Economics Rajamangala University of Technology Suvarnabhumi Wasukri Campus Phra Nakhon Si Ayutthaya13000 Thailand Program in Biotechnology Faculty of Science Maejo University Chiang Mai50290 Thailand

This study was conducted to analyze the potential of producing bioethanol from sunflower stalks with the optimized pretreatment models on total sugar production from sunflower stalk (SS) utilization to decompose the lignocellulosic biomass to sugar. The accumulation variables were examined in the pretreatment model, including pretreatment temperature (30, 35, and 40 °C), NaOH concentration (1, 1.5, and 2%), and duration (1, 2, and 3 days). Total sugar production was optimized using response surface methodology (RSM) on central composite design (CCD) models. In addition, the economic strategy was carried out. It was found that sunflower stalks have properties that can be used to produce bioethanol. One kilogram of dried sunflower stalks containing 8.398 g of ethanol at 8% purity can be distilled. Economic feasibility and sensitivity analysis of the project showed that the economic net present value is about 31,875 US $ cost and benefit ratio equal 1.11, and the internal rate of return is about 10%. This investment feasibility assessment is for the dried chopped agricultural waste processing plants, and its output will be used as a raw material for ethanol production, which is worthwhile and could return the capital within 8 years. However, this project needs support from the public and private sectors, and the state may have a policy of paying subsidies to bioethanol producers to increase interest in the use of dried chopped agricultural waste. This will allow for the development of the local economy and provide an alternative way to select raw materials for bioethanol production. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2022.

关键词： Cost benefit analysis

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