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Regulating Zinc Deposition via Zincophilic 2D-Cu2Te as the Current Collector to Suppress Dendrite Formation toward High Performance Aqueous Zinc-Ion Batteries

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BATTERIES & SUPERCAPS 2023年第8期6卷

作者： Tsai, M-H Lin, T-Y Su, T-S Chen, G-M Liu, Y-c Chen, Y-Z Department of Materials Science and Engineering National Cheng Kung University Tainan City 70101 Taiwan Contribution: Investigation (equal) Contribution: Investigation (supporting) Department of Mechanical Engineering National Cheng Kung University Tainan City 70101 Taiwan Hierarchical Green-Energy Materials (Hi-GEM) Research Center National Cheng Kung University Tainan City 70101 Taiwan Program on Smart and Sustainable Manufacturing Academy of Innovative Semiconductor and Sustainable Manufacturing National Cheng Kung University Tainan City 70101 Taiwan Program on Semiconductor Packaging and Testing Academy of Innovative Semiconductor and Sustainable Manufacturing National Cheng Kung University Tainan City 70101 Taiwan Core Facility Center National Cheng Kung University Tainan City 70101 Taiwan Contribution: Supervision (supporting) Program on Key Materials Academy of Innovative Semiconductor and Sustainable Manufacturing National Cheng Kung University Tainan City 70101 Taiwan Contribution: Supervision (lead)

Invited for this month's cover is the group of Nano Horizons Lab hosted by Prof. Yu-Ze Chen. The cover picture shows the lateral deposition of Zn guided by zincophilic Cu2Te flakes, resulting in the suppression of... 详细信息

关键词： δ-Cu2Te flakes aqueous zinc-ion batteries machine learning tellurization Zn dendrite

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Corrigendum to “A comprehensive review on atmospheric water harvesting technologies: From thermodynamic concepts to mechanism and process development”

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Journal of Water Process engineering 2024年 59卷

作者： Hasan Nikkhah Wan Mujiburahman Bin Wan Azmi Ali Nikkhah Amir Mohammad Najafi Mohsen Mesbahi Babaei Chua Siew Fen Alireza Nouri Abdul Wahab Mohammad Ang Wei Lun Ng Law Yong Ebrahim Mahmoudi Department of Chemical and Process Engineering Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia Bangi 43600 Malaysia Department of Chemical and Biomolecular Engineering University of Connecticut Storrs USA Department of Mechanical and Aerospace Engineering University at Buffalo Buffalo USA Department of Chemical Engineering Sharif university of Technology Tehran Iran School of Chemical Petroleum and Gas Engineering Iran University of Science and Technology (IUST) Tehran Iran Chemical and Water Desalination Engineering Program College of Engineering University of Sharjah Sharjah 27272 United Arab Emirates Lee Kong Chian Faculty of Engineering and Science Universiti Tunku Abdul Rahman Jalan Sungai Long Bandar Sungai Long Kajang Selangor Malaysia

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Study of acoustic characteristics of the swirling flow generated in ejector 4

Study of acoustic characteristics of the swirling flow gener...

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4th International Conference on Applied Physics, Simulation and Computing, APSAC 2020

作者： Vekteris, V. Styra, A. Mokshin, V. Turla, V. Viselga, G. Tetsman, I. Department of Mechanical and Material Engineering Vilnius Gediminas Technical University J. Basanavičiaus str. 28 Vilnius03224 Lithuania Department of Mechatronics Robotics and Digital Manufacturing Vilnius Gediminas Technical University J. Basanavičiaus str. 28 Vilnius03224 Lithuania

The article deals with changes in the density of pulsating water and air flow generated in pulsating flow ejector. Transformation of the fluid motion equation to Lighthill's equation describing density change and acoustic radiation of the flow is presented. Calculation results demonstrate suitability of the ejector to cause acoustic agglomeration and effectively remove iron particles from potable water. © Published under licence by IOP Publishing Ltd.

关键词： Potable water

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Super-resolution multicolor fluorescence microscopy enabled by an apochromatic super-oscillatory lens with extended depth-of-focus

arXiv

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arXiv 2022年

作者： Li, Wenli He, Pei Fan, Yulong Du, Yangtao Gao, Bo Chu, Zhiqin An, Chengxu Lei, Dangyuan Yuan, Weizheng Yu, Yiting Research & Development Institute of Northwestern Polytechnical University in Shenzhen College of Mechanical Engineering Ningbo Institute of Northwestern Polytechnical University Northwestern Polytechnical University Xi'An710072 China Northwestern Polytechnical University Xi'An710072 China Shaanxi Province Key Laboratory of Micro and Nano Electro-Mechanical Systems Northwestern Polytechnical University Xi'An710072 China Department of Materials Science and Engineering City University of Hong Kong 999077 Hong Kong The Institute of Ai and Robotics Fudan University Shanghai200433 China Key Laboratory of Spectral Imaging Technology of Chinese Academy of Sciences Xi'an Institute of Optics and Precision Mechanics Chinese Academy of Sciences Xian710119 China Department of Electrical and Electronic Engineering Joint Appointment with School of Biomedical Sciences The University of Hong Kong 999077 Hong Kong

Multicolor super-resolution imaging remains an intractable challenge for both far-field and near-field based super-resolution techniques. Planar super-oscillatory lens (SOL), a far-field subwavelength-focusing diffractive lens device, holds great potential for achieving sub-diffraction-limit imaging at multiple wavelengths. However, conventional SOL devices suffer from a numerical aperture (NA) related intrinsic tradeoff among the depth of focus (DoF), chromatic dispersion and focus spot size, being an essential characteristics of common diffractive optical elements. Typically, the limited DoF and significant chromatism associated with high NA can lead to unfavorable degradation of image quality although increasing NA imporves the resolution. Here, we apply a multi-objective genetic algorithm (GA) optimization approach to design an apochromatic binary-phase SOL that generates axially jointed multifoci concurrently having prolonged DoF, customized working distance (WD) and suppressed side-lobes yet minimized main-lobe size, optimizing the aforementioned NA-dependent tradeoff. Experimental implementation of this GA-optimized SOL demonstrates simultaneous focusing of blue, green and red light beams into an optical needle of ∼0.5λ in diameter and >10λ in length (DoF) at 428 μm WD, resulting in an ultimate resolution better than λ/3 in the lateral dimension. By integrating this apochromatic SOL device with a commercial fluorescence microscope, we employ the optical needle to perform, for the first time, three-dimensional super-resolution multicolor fluorescence imaging of the "unseen" fine structure of neurons at one go. The present study provides not only a practical route to far-field multicolor super-resolution imaging but also a viable approach for constructing imaging systems avoiding complex sample positioning and unfavorable photobleaching. Copyright © 2022, The Authors. All rights reserved.

关键词： Needles

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Resilient control of platooning networked robotic systems via dynamic watermarking

arXiv

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arXiv 2021年

作者： Porter, Matthew Joshi, Arnav Dey, Sidhartha Wu, Qirui Hespanhol, Pedro Aswani, Anil Johnson-Roberson, Matthew Vasudevan, Ram Department of Mechanical Engineering University of Michigan Ann ArborMI48103 United States Robotics Institute University of Michigan Ann ArborMI48103 United States Department of Computer Engineering University of Michigan Ann ArborMI48103 United States Department of Industrial Engineering and Operations Research University of California Berkeley BerkeleyCA94720 United States Department of Naval Architecture University of Michigan Ann ArborMI48103 United States

Networked robotic systems, such as connected vehicle platoons, can improve the safety and efficiency of transportation networks by allowing for high-speed coordination. To enable such coordination, these systems rely on networked communications. This can make them susceptible to cyber attacks. Though security methods such as encryption or specially designed network topologies can increase the difficulty of successfully executing such an attack, these techniques are unable to guarantee secure communication against an attacker. More troublingly, these security methods are unable to ensure that individual agents are able to detect attacks that alter the content of specific messages. To ensure resilient behavior under such attacks, this paper formulates a networked linear time-varying version of dynamic watermarking in which each agent generates and adds a private excitation to the input of its corresponding robotic subsystem. This paper demonstrates that such a method can enable each agent in a networked robotic system to detect cyber attacks. By altering measurements sent between vehicles, this paper illustrates that an attacker can create unstable behavior within a platoon. By utilizing the dynamic watermarking method proposed in this paper, the attack is detected, allowing the vehicles in the platoon to gracefully degrade to a non-communicative control strategy that maintains safety across a variety of scenarios. Copyright © 2021, The Authors. All rights reserved.

关键词： Network security

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Characteristic of beef tallow/rice husk charcoal/plaster composite phase change materials

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AIP Conference Proceedings 2023年第1期2568卷

作者： I. Made Astika I. Nyoman Suprapta Winaya I. Ketut Gede Wirawan Akhmad Herman Yuwono I. Dewa Gede Ary Subagia 1Doctoral Study Program of Engineering Science Faculty of Engineering Udayana University Kampus Sudirman Denpasar Bali 80234 Indonesia. 2Study Program of Mechanical Engineering Faculty of Engineering Udayana University Kampus Bukit Jimbaran Badung Bali 80361 Indonesia 3Department of Metallurgy and Materials Engineering Faculty of Engineering Universitas Indonesia Kampus Baru UI Depok Depok 16424 Indonesia

Composite materials are a combination of several materials to form a new material with specific properties. Chemical compatibility of the constituent materials is a factor that affects the characteristics of composite materials. Currently, composite phase change materials (PCM) are commonly applied as thermal energy storage systems. This study investigated the characteristics of beef tallow/rice husk charcoal/plaster PCM composite. The weight fraction of rice husk charcoal used was 10%. To prevent leakage of beef tallow from the composite structure, the researcher used polyvinyl acetate (PVAc) to cover the tallow/RHC composite before mixing it with plaster material. As much as 30% of the tallow/RHC/PVAc composite weight fraction is integrated into the plaster. PCM composite was made by using a direct incorporation method. The FTIR test results on the PCM composites produced showed good chemical compatibility among different components. The scanning electron microscope results showed the formation of microcapsules where the rice husk charcoal and polyvinyl acetate functions as a wrapper/capsule for beef tallow. This composite is suitable for application in building walls as thermal energy storage.

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Subdomain Method in Time with Waveform Relaxation in Space Applied to the Wave Equation Combined with the Multigrid Method

SSRN

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SSRN 2022年

作者： Malacarne, Maicon F. Pinto, Marcio A.V. Franco, Sebastião R. Graduate Program in Numerical Methods in Engineering - PPGMNE Federal University of Parana - UFPR Brazil Cel. Francisco H. dos Santos Ave 100 Jardim das Américas Curitiba81530-000 Brazil Department of Mechanical Engineering Federal University of Parana - UFPR Marcio Brazil Department of Mathematics State University of Centro Oeste - UNICENTRO Brazil Professora Maria Roza Zanon de Almeida St - Engenheiro Gutierrez Irati84505-677 Brazil

This work aims to evaluate a parallelizable approximate solution model for the wave equation. For that, we used the temporal sweep known as the Waveform Relaxation method to guarantee the parallelization in space. However, this technique has limitations for this class of problems. Therefore, we combined the Subdomain method in a non-conventional way in time with the Multigrid method, intending to reduce computational time and improve the convergence factors. In this work, we present the mathematical analysis of the stability of the discretization model, which uses the Central Finite Difference method with weighting at each time step. As an application of the proposed method, in addition to a problem with a known analytical solution, we solved a wave propagation problem with reflection and phase inversion. © 2022, The Authors. All rights reserved.

关键词： Finite difference method

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Variable Tumor Microenvironment-on-a-chip with Temporal Angiogenic Switching System by Diffusion Control*

Variable Tumor Microenvironment-on-a-chip with Temporal Angi...

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Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： SungHyun Cho Hyung Seok Choi Jung Eun Yang Seung Beum Suh Center for Medical Robotics Korea Institute of Science and Technology Seoul Korea Department of Mechanical Engineering Seoul National University Seoul Korea Division of Mechanical and Biomedical Engineering Ewha Womans University Seoul Korea

ISBN: (数字)9781728119908

ISBN: (纸本)9781728119915

Organ-on-a-chip has the potential to replace preclinical trials which have been problematic for decades due to unaffordable cost and time. The performance of in vitro tumor-on-a-chip depends on how accurately the system represents analogous tumor-microenvironment (TME) and TME associated phenomena. In this study, we have focused on angiogenesis, one of the most significant features of TME for tumor growth and metastasis. Angiogenesis in TME is triggered through cascaded interactions among TME associated neighboring cells including immune cells, tumor cells, and fibroblast cells [1]. Therefore, temporally-controlled TME-on-a-chip is desired for an accurate representation of angiogenesis. However, conventional microfluidic devices cannot temporarily manipulate the condition of interacting cells and secreted signal molecules. Here, we proposed a hydrogel-based variable TME-on-a-chip with diffusion switch channels. The channels between hydrogel walls enable temporal diffusion control by controlling inflow. The diffusion control was observed in diffusion experiment with a fluorescent dye. Furthermore, experiment of HUVEC's migration toward diffused VEGF also confirmed that TME-on-a-chip is capable of reproducing an angiogenic switch triggering through temporal diffusion control. Due to a simple fabrication procedure, the design of the microfluidic device can be easily modified to represent more complex variable TME models.

关键词： Switches Tumors Microfluidics Fluorescence Drugs Media

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A new quasi-steady in-ground effect model for rotorcraft unmanned aerial vehicles

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ASME 2019 Dynamic Systems and Control Conference, DSCC 2019

作者： He, Xiang Leang, Kam K. Lab Department of Mechanical Engineering Utah Robotics Center University of Utah Salt Lake CityUT84112 United States

ISBN: (纸本)9780791859162

This paper introduces a new quasi-steady in-ground effect model for rotorcraft unmanned aerial vehicles to predict the aerodynamic behavior when the vehicle's rotors approach ground plane. The model assumes that the compression of the outflow due to the presence of ground plane induces a change in the induced velocity that can drastically affect the thrust and power output. The new empirical model describes the change in thrust as a function of the distance to an obstacle for a rotor in hover condition. Using blade element theory and the method of image, the model parameters are described in terms of the rotor pitch angle and solidity. Experiments with off-the-shelf, fixed-pitch propellers and 3D-printed variable pitch propellers are carried out to validate the model. Experimental results suggest good agreement with 9.5% root-mean-square error (RMSE) and 97% p-value of statistic significance. © 2019 ASME.

关键词： Mean square error

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LB1712 A clinical study of atomic-force microscopy-based rapid atopic dermatitis severity assessment

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Journal of Investigative Dermatology 2023年第9期143卷 B18-B18页

作者： J. Pereda H. Liao J. Wang E. Raun L.O. Nørgaard F.E. Dons E. Hwu Health Technology Danmarks Tekniske Universitet Lyngby Hovedstaden Denmark Mechanical Engineering National Taiwan University Taipei Taiwan Department of Mechatronics and Robotics Technische Universitat Munchen Munchen Bayern Germany

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