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23rd International Conference on Computational Science and Its Applications, ICCSA 2023

作者： Ribeiro, Sérgio Lopes, Luiz Guerreiro Postgraduate Program in Informatics Engineering University of Madeira Funchal Madeira Is. Portugal Faculty of Exact Sciences and Engineering University of Madeira Funchal Madeira Is.9020-105 Portugal

ISBN: (纸本)9783031371288

Nature-inspired optimization algorithms have been proposed for solving hard optimization problems, including the optimization-based solution of difficult systems of nonlinear equations. While there is no perfect optimization algorithm, the hybridization of such metaheuristic optimization algorithms has produced positive results by enhancing their capabilities and reducing their weaknesses. This paper presents a novel hybridization of Particle Swarm Optimization and the Fireworks Algorithm for solving nonlinear equation systems. The experimental results obtained indicate that the proposed hybrid algorithm outperforms both Particle Swarm Optimization and the Fireworks Algorithm, as well as a previously developed hybridization of these algorithms. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Nonlinear equations

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Autonomous self-healing 3D micro-suction adhesives for multi-layered amphibious soft skin electronics

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InfoMat 2024年第10期6卷 65-79页

作者： Dohyun Lim Min Woo Jeong Hyeongho Min Yeon Soo Lee Gui Won Hwang Seung Hwan Jeon Kyu Ho Jung Ngoc Thanh Phuong Vo Min-Seok Kim Da Wan Kim Jin Young Oh Changhyun Pang School of Chemical Engineering Sungkyunkwan University(SKKU)SuwonGyeonggi-doRepublic of Korea Department of Chemical Engineering(Integrated Engineering Program) Kyung Hee UniversityYonginGyeonggiRepublic of Korea Convergence Research Group for Meta-Touch Korea Research Institute of Standards and ScienceDaejeonRepublic of Korea Department of Electronic Engineering Korea National University of TransportationChungju-siChungbukRepublic of Korea Samsung Advanced Institute for Health Sciences and Technology(SAIHST) Sungkyunkwan UniversitySuwonGyunggi-doRepublic of Korea

Autonomously self-healing, reversible, and soft adhesive microarchitecturesand structured electric elements could be important features in stable and versatilebioelectronic devices adhere to complex surfaces of the human body(rough, dry, wet, and vulnerable). In this study, we propose an autonomousself-healing multi-layered adhesive patch inspired by the octopus, which possessself-healing and robust adhesion properties in dry/underwater *** implement autonomously self-healing octopus-inspired architectures, adynamic polymer reflow model based on structural and material design suggestscriteria for three-dimensional patterning self-healing elastomers. In addition,self-healing multi-layered microstructures with different moduli endowsefficient self-healing ability, human-friendly reversible bio-adhesion, and stablemechanical deformability. Through programmed molecular behavior ofmicrolevel hybrid multiscale architectures, the bioinspired adhesive patchexhibited robust adhesion against rough skin surface under both dry andunderwater conditions while enabling autonomous adhesion restoring performanceafter damaged (over 95% healing efficiency under both conditions for24 h at 30℃). Finally, we developed a self-healing skin-mountable adhesiveelectronics with repeated attachment and minimal skin irritation by laminatingthin gold electrodes on octopus-like structures. Based on the robust adhesionand intimate contact with skin, we successfully obtained reliable measurements during dynamic motion under dry, wet, and damagedconditions.

关键词： biomimetics dry adhesive self-healing polymer stretchable electronics

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Optimal Fractional Order PID Control of Sensorless BLDC Motor

Optimal Fractional Order PID Control of Sensorless BLDC Moto...

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2023 IEEE International Conference on Omni-Layer Intelligent Systems, COINS 2023

作者： Amir Atef, F.H. Abdelfatah, Roba Madbouly, Ahmed Samy, Mohamed Abo-Alnaga, Bahaa-Aldeen Shalaby, Raafat Giza Egypt School of Engineering and Applied Sciences Nile University Giza Egypt Menofia University Menouf and MENG Program Nile University Faculty of Electronics Engineering Giza Egypt

ISBN: (纸本)9798350346473

This paper presents the implementation of a Fractional Order PID (FOPID) controller for regulating the angular speed of a Brushless DC (BLDC) sensorless motor. The controller is optimized using the Flower Pollination Algorithm and Genetic Algorithm (GA) to determine the optimal values for the fractional order system parameters and PID parameters of the controller. A comparison between the results obtained from FOPID and PID controllers is conducted, focusing on the strengths of FOPID in terms of rising time, overshoot, and settling time when controlling the angular speed of the BLDC motor. The simulation results unequivocally demonstrate that FOPID is the optimal choice for angular speed control, yielding a satisfactory transient response, particularly with regards to the critical rising time aspect, which holds significance across a wide range of applications involving BLDC motors. © 2023 IEEE.

关键词： Brushless DC motors

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Increased deformations are dispensable for encapsulated cell mechanoresponse in engineered bone analogs mimicking aging bone marrow

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Mechanobiology in Medicine 2025年第1期3卷 57-67页

作者： Alexander M.Regner Maximilien DeLeon Kalin D.Gibbons Sean Howard Derek Q.Nesbitt Seyedeh F.Darghiasi Anamaria G.Zavala Trevor J.Lujan Clare K.Fitzpatrick Mary C.Farach-Carson Danielle Wu Gunes Uzer Mechanical and Biomedical Engineering Department Boise State UniversityUSA Department of Diagnostic and Biomedical Sciences UTHealth Houston School of DentistryUSA Department of Bioengineering Rice UniversityUSA Department of Biosciences Rice UniversityUSA Biomedical Engineering Program Boise State UniversityUSA

Aged individuals and astronauts experience bone loss despite rigorous physical *** mechanoresponse is in-part regulated by mesenchymal stem cells(MSCs)that respond to mechanical *** delivery of low intensity vibration(LIV)recovers MSC proliferation in senescence and simulated microgravity models,indicating that age-related reductions in mechanical signal delivery within bone marrow may contribute to declining bone *** answer this question,we developed a 3D bone marrow analog that controls trabecular geometry,marrow mechanics and external *** finite element(FE)models were developed to quantify strain environment within hydrogels during *** marrow analogs with gyroid-based trabeculae of scaffold volume fractions(SV/TV)corresponding to adult(25%)and aged(13%)mice were printed using polylactic acid(PLA).MSCs encapsulated in migration-permissive hydrogels within printed trabeculae showed robust cell populations on both PLA surface and hydrogel within a *** 14 days of LIV treatment(1 g,100 Hz,1 h/day),cell proliferation,type-I collagen(Collagen-I)and filamentous actin(F-actin)were quantified for the cells in the hydrogel *** LIV increased all measured outcomes,FE models predicted higher von Mises strains for the 13%SV/TV groups(0.2%)when compared to the 25%SV/TV group(0.1%).While LIV increased collagen-I volume 34%more in 13%SV/TV groups when compared to 25%SV/TV groups,collagen-I and F-actin measures remained lower in the 13%SV/TV groups when compared to 25%SV/TV counterparts,indicating that both LIV-induced strains and scaffold volume fraction(*** scaffold surface)affect cell behavior in the hydrogel ***,bone marrow analogs offer a robust and repeatable platform to study bone mechanobiology.

关键词： Mechanical signals Low-intensity vibration Mesenchymal stem cells 3D printing Mechanical modeling Tissue modeling

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Alkyl-thiophene-alkyl linkers to construct double-cable conjugated polymers for single-component organic solar cells

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Chinese Chemical Letters 2024年第1期35卷 542-546页

作者： Wenbin Lai Safakath Karuthedath Chengyi Xiao Lei Meng Frédéric Laquai Weiwei Li Yongfang Li Beijing National Laboratory for Molecular Sciences Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China Beijing Advanced Innovation Center for Soft Matter Science and Engineering&State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China King Abdullah University of Science and Technology(KAUST) KAUST Solar Center(KSC)Physical Sciences and Engineering Division(PSE)Material Science and Engineering Program(MSE)Thuwal 23955-6900Kingdom of Saudi Arabia University of Chinese Academy of Sciences Beijing 100049China Institute of Materials Research Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China

In this work,semirigid linkers of the alkyl-thiophene-alkyl structure are developed to construct double-cable *** alkyl units,propyl(C3H6),hexyl(C6H12),and dodecyl(C12H24),are applied as semirigid linkers,yielding three double-cable polymers:PBC6-T,PBC12-T,and PBC24-T,***12-T which uses C6H12-thiophene-C6H12 linkers is found to exhibit the best device efficiency of 5.56%,while PBC6-T and PBC24-T with shorter or longer linkers yield device efficiencies of only 2.65%and 1.09%in single-component organic solar cells(SCOSCs).Further studies reveal that PBC12-T exhibits higher crystallinity and improved charge transport,resulting in better *** work provides an approach to construct double-cable conjugated polymers with long alkyl linkers,and it shows the importance of the linker length for the photovoltaic performance of SCOSCs.

关键词： Double-cable conjugated polymer Single-component organic solar cell Crystallinity Semirigid linkers Alkyl-thiophene-alkyl

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Semi-analytical finite element method applied for characterizing micropolar fibrous composites

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Applied Mathematics and Mechanics(English Edition) 2024年第12期45卷 2147-2164页

作者： J.A.OTERO Y.ESPINOSA-ALMEYDA R.RODRIGUEZ-RAMOS J.MERODIO School of Engineering and Sciences Monterrey Institute of TechnologyEstado de Mexico 52926Mexico Institute of Engineering and Technology Autonomous University of Ciudad JuarezCiudad JuarezChihuahua 32310Mexico Postgraduate Program in Computational Modeling in Science and Technology Federal Fluminense UniversityRıo de Janeiro 27255-125Brazil Faculty of Mathematics and Computer Science University of HavanaLa Habana 10400Cuba Department of Mathematics Applied to ICT School of Informatics Systems EngineeringTechnical University of MadridMadrid 28031Spain

A semi-analytical finite element method(SAFEM),based on the two-scale asymptotic homogenization method(AHM)and the finite element method(FEM),is implemented to obtain the effective properties of two-phase fiber-reinforced composites(FRCs).The fibers are periodically distributed and unidirectionally aligned in a homogeneous *** framework addresses the static linear elastic micropolar problem through partial differential equations,subject to boundary conditions and perfect interface contact *** mathematical formulation of the local problems and the effective coefficients are presented by the *** local problems obtained from the AHM are solved by the FEM,which is denoted as the *** numerical results are provided,and the accuracy of the solutions is analyzed,indicating that the formulas and results obtained with the SAFEM may serve as the reference points for validating the outcomes of experimental and numerical computations.

关键词： semi-analytical approach fiber-reinforced composite(FRC) effective property finite element method(FEM) asymptotic homogenization method(AHM) micropolar elasticity

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Co-Al layered double oxide activated carbon composite for eliminating lead ions from water

Co-Al layered double oxide activated carbon composite for el...

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2023 Sharjah International Conference on Physics of Advanced Materials, SICPAM 2023

作者： Abushawish, Alaa Chatla, Anjaneyulu Almanassra, Ismail W Shanableh, Abdallah Atieh, Muataz Ali Research Institute of Sciences & Engineering University of Sharjah Sharjah27272 United Arab Emirates Department of Civil and Environmental Engineering University of Sharjah Sharjah27272 United Arab Emirates Chemical and Water Desalination Engineering Program College of Engineering University of Sharjah Sharjah27272 United Arab Emirates

In the current study, preparation of cobalt-aluminum layered double oxide doped activated carbon (Co-Al LDO/AC) was achieved by the co-precipitation technique and utilized for the remediation of lead (Pb2+) from water. Various methods were employed to examine the properties of the composite material, including BET, XRD, FTIR, SEM, and EDS analysis. The material characterization outcomes indicated that the LDO structure was successfully incorporated into the AC matrices with a surface area of 189.4 m2/g. The influence of adsorption parameters including Co-Al LDO/AC dosage, period of contact, initial Pb2+ loading, and initial solution pH were investigated. Moreover, the isotherm and kinetic models were investigated to provide a deeper understanding of the elimination mechanism of Pb2+ ions. The adsorption results illustrated that pH has a substantial influence on Pb2+ removal with a highest removal effectiveness at pH = 6 and a fast adsorption rate within 7 h. The kinetic data were well aligned with the pseudo-second-order model while the isotherm data obeyed the Sips model (R2>0.966). The highest adsorption uptake, estimated by the Sips model was 25.09 mg/g. Considering the modeling and characterization of the spent Co-Al LDO/AC, a chemical interaction process was involved in the elimination process and mainly controlled by ion exchange, electrostatic interactions, and surface complexation mechanisms. Accordingly, the Co-Al LDO/AC could have great potential as a promising hybrid for the purification of toxic Pb2+ ions from contaminated water streams. © Published under licence by IOP Publishing Ltd.

关键词： Ions

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Development of ocean renewable energy model in indonesia to support eco-friendly energy

Development of ocean renewable energy model in indonesia to ...

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2023 Annual Conference, ASPRS 2023

作者： Anggraini, T.S. Santoso, C. Doctor Program of Geodesy and Geomatics Engineering Faculty of Earth Sciences and Technology Institut Teknologi Bandung Jl. Ganesha No.10 Bandung40132 Indonesia Bachelor Program of Geodesy and Geomatics Engineering Faculty of Earth Sciences and Technology Institut Teknologi Bandung Jl. Ganesha No.10 Bandung40132 Indonesia

Renewable energy is a solution for reducing environmental damage caused by greenhouse gas emissions from fossil fuels. Energy consumption in Indonesia involves sectors such as industry, households, transportation, and agriculture, which still heavily rely on non-renewable energy sources. Indonesia possesses significant maritime potential, boasting the second longest coastline in the world, a water area covering 71%, and abundant marine biological resources that can contribute to maritime economic growth. This research aims to leverage remote sensing technology and geographic information science to harness Indonesia's maritime potential. In the realm of renewable energy, this study emphasizes the potential of wave energy and current energy in Indonesia, with the objective of establishing an Ocean Renewable Energy (ORE) model. Additionally, the research will consider marine habitat suitability to mitigate any negative impact on biodiversity from power generation activities. Based on the research findings, the ocean current energy in Lombok Strait has a high energy potential reaching 1,035 Watts and Maluku Sea has 1,536 Watts, while the southwest region exhibits wave energy potential of Panaitan Island has a wave energy potential of 23,051 kW/m, while Sangiang Island has a potential of 12,842 kW/m. Furthermore, potential energy locations will be identified through the overlaying of potential fish zones. The ultimate goal of this research is to fulfill sustainable energy needs, decrease dependence on fossil fuels, and promote sustainable economic growth in Indonesia. © 2023 International Society for Photogrammetry and Remote Sensing. All rights reserved.

关键词： Fossil fuels

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Technology-Enhanced Learning for User Security Awareness Using AI-based Naive RAG: A Design and Prototype

Technology-Enhanced Learning for User Security Awareness Usi...

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2025 International Conference on Advancement in Data Science, E-learning and Information System, ICADEIS 2025

作者： Pratama, I. Putu Agus Eka Widyantara, I. Made Oka Linawati Gunantara, Nyoman Suakanto, Sinung Irawan, Eka Tresna Udayana University Doctoral Program of Engineering Sciences Faculty of Engineering Bali Badung Indonesia Udayana University Dept. of Electrical Engineering Faculty of Engineering Bali Badung Indonesia Telkom University Dept. of Information System West Java Bandung Indonesia Mayar International Pte. Ltd. Singapore

ISBN: (纸本)9798331513320

The increasing use of Information Technology (IT) in all areas of life, followed by increasing cybersecurity threats on the user side, makes cybersecurity awareness among users an obligation that must be met. Several solutions currently available (guides, discussion forums, workshops) have not been able to provide good results and are lacking in terms of user engagement, adaptability, and optimizing available resources, so technology-based learning is needed, especially AI. This paper introduces the design and prototype of an AI-based learning system, especially with the Naive Retrieval-Augmented Generation (Naive RAG) method with three steps, including Retrieval, Augmented, and Generation. The system combines contextual user questions and answers with internal and domain knowledge systems to explain cybersecurity awareness to users dynamically and personally. The prototype that has been developed is then tested using the Black Box Testing method to evaluate functionality and usability. The test results show that the functionality of the system built has run well with a percentage of success of 100%, so it can be used as a technologybased learning medium for education and learning of user security awareness. © 2025 IEEE.

关键词： Adversarial machine learning

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Families of Multidimensional Periodic Arrays with Optimal Low Cross-Correlation 1st

Families of Multidimensional Periodic Arrays with Optimal Lo...

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1st International Symposium on Intelligent Computing and Networking, ISICN 2024

作者： Bolaños, César Bollman, Dorothy Doctoral Program in Computing and Information Sciences and Engineering University of Puerto Rico at Mayagüez Mayagüez00680 Puerto Rico Department of Mathematical Sciences University of Puerto Rico at Mayagüez Mayagüez00680 Puerto Rico

ISBN: (纸本)9783031674464

We construct new families of multidimensional periodic arrays that can be used for digital watermarking videos and images. Each member of each family is composed of columns of cyclic shifts of a Sidelnikov sequence in which the shifts are given by a multidimensional m1×m2×…×mn "grid" that is determined by applying a logarithmic quadratic map to the elements of a direct product Zm1×Zm2×…×Zmn. These arrays have peak auto-correlation on the order of p2l and non-peak auto- and cross-correlation on the order of pl, where l≥2 and m1m2…mn=pl-1, thereby improving the peak auto-correlation to nonpeak auto- and cross-correlations of other known constructions. Additionally, we show that the low cross-correlation values are optimal with respect to the Welch bound. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.

关键词： Watermarking

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