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Compliant lightweight non-invasive standalone“Marine Skin”tagging system

npj Flexible Electronics 2018年第1期2卷 97-105页

作者： Joanna M.Nassar Sherjeel M.Khan Seneca J.Velling Andrea Diaz-Gaxiola Sohail F.Shaikh Nathan R.Geraldi Galo A.Torres Sevilla Carlos M.Duarte Muhammad M.Hussain mmh Labs Computer Electrical Mathematical Science and Engineering DivisionKing Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Saudi Arabia Material&Nanoscience Program Faculty of ScienceUniversity of WaterlooWaterlooON N2L-3G1Canada Red Sea Research Center(RSRC) Biological and Environmental Sciences and Engineering(BESE)DivisionKing Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Saudi Arabia

Current marine research primarily depends on weighty and invasive sensory equipment and telemetric network to understand the marine environment,including the diverse fauna it contains,as a function of animal behavior and size,as well as equipment *** match animal morphology and activity within the surrounding marine environment,here we show a physically flexible and stretchable skin-like and waterproof autonomous multifunctional system,integrating Bluetooth,memory chip,and high performance physical *** sensory tag is mounted on a swimming crab(Portunus pelagicus)and is capable of continuous logging of depth,temperature,and salinity within the harsh ocean *** fully packaged,ultra-lightweight(<2.4 g in water),and compliant“Marine Skin”system does not have any wired connection enabling safe and weightless cuttingedge approach to monitor and assess marine life and the ecosystem’s health to support conservation and management of marine ecosystems.

关键词： Marine system Skin

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Dynamic compressed sensing for real-Time tomographic reconstruction

arXiv

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arXiv 2020年

作者： Schwartz, Jonathan Zheng, Huihuo Hanwell, Marcus Jiang, Yi Hovden, Robert Department of Material Science and Engineering Ann ArborUniversity of Michigan MichiganMI United States Argonne Leadership Computing Facility Argonne National Laboratory LemontIL United States Kitware Inc Clifton ParkNY United States Advanced Photon Source Facility Argonne National Laboratory LemontIL United States Applied Physics Program University of Michigan Ann ArborMI United States

Electron tomography has achieved higher resolution and quality at reduced doses with recent advances in compressed sensing. Compressed sensing (CS) theory exploits the inherent sparse signal structure to effciently reconstruct three-dimensional (3D) volumes at the nanoscale from un-dersampled measurements. However, the process bottlenecks 3D reconstruction with computation times that run from hours to days. Here we demonstrate a framework for dynamic compressed sens-ing that produces a 3D specimen structure that updates in real-Time as new specimen projections are collected. Researchers can begin interpreting 3D specimens as data is collected to facilitate high-throughput and interactive analysis. Using scanning transmission electron microscopy (STEM), we show that dynamic compressed sensing accelerates the convergence speed by 3-fold while also re-ducing its error by 27% for a Au/SrTiO3 nanoparticle specimen. Before a tomography experiment is completed, the 3D tomogram has interpretable structure within 33% of completion and fine details are visible as early as 66%. Upon completion of an experiment, a high-fidelity 3D visualization is produced without further delay. Additionally, reconstruction parameters that tune data delity can be manipulated throughout the computation without rerunning the entire process. Copyright © 2020, The Authors. All rights reserved.

关键词： Compressed sensing

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Spintronic terahertz emission from Ni/Pt bilayer grown on MgO

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Journal of Physics: Conference Series 2021年第1期1943卷

作者： J P Ferrolino N I Cabello A De Los Reyes V K Mag-Usara J P Afalla H Bardaloza I C Verona M Talara H Kitahara A Somintac A Salvador M Tani E Estacio Material Science and Engineering Program University of the Philippines Diliman. Diliman Quezon City 1101 Philippines National Institute of Physics College of Science University of the Philippines Diliman Diliman Quezon City 1101 Philippines Research Center for Development of Far Infrared Region University of Fukui Bunkyo 3-9-1 Fukui City 910-8507 Japan

Spintronic THz emission from Ni/Pt bilayer grown on MgO is reported based on the novel THz emitter using metallic structures. The Ni metal was deposited first on a MgO substrate and capped with a thin Pt metal via electron beam deposition. The THz emission data was obtained using a standard terahertz time-domain spectroscopy setup using a Ti: sapphire laser excitation source. Initial measurements were done using 800nm excitation with 7 mW and 185 mW pump powers under upward and downward magnetic field orientations. Polarity reversal of the terahertz signal was observed upon changing the orientation of the magnetic field. Maximum amplitude was found at 0.5 THz with bandwidth up to ~6 THz. A saturation fluence of 85.04 mJ/cm2 was calculated from the pump fluence-dependence plot of the THz peak-to-peak signal. The results are consistent with the spintronic THz emission due to the inverse spin-Hall effect and provide insights for future development and optimizations.

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Prediction of the MOR of larch lumber

Journal of the Korean Wood Science and Technology

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Journal of the Korean Wood science and Technology 2018年第1期46卷 93-99页

作者： Lee, In-Hwan Cho, Soo-Min Hong, Soon-Il Program of Forest Biomaterials Engineering Division of Forest Material Science and Engineering Kangwon National University Chuncheon24341 Korea Republic of

It is necessary to review the non-destructive indexes in order to estimate the bending strength performance of the domestic larch lumber. In this study, MOEs (modulus of elastic) the larch lumber (cross-section 89 × 120 mm) were evaluated through non-destructive methods such as the ultra-sonic method, longitudinal vibration method, and non-destructive bending method. The non-destructive measurement method which best represented the static MOE was determined and applied as the MOR(modulus of rupture) estimation index. The MOE that was measured through the longitudinal vibration method showed the highest correlation with the static MOE. The MOR was highly related to the static MOE. Therefore, the non-destruction MOE measured through the longitudinal vibration method was used to estimate the MOR of the lumber.

关键词： Bending strength

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Fibrillation characteristics of KOCC and its effect on the physical properties of linerboard

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Palpu Chongi Gisul/Journal of Korea Technical Association of the Pulp and Paper Industry 2018年第5期50卷 93-99页

作者： Han, Jun Kyu Hwang, Im Jeong Kim, Jin Mo Choi, Jae Jun Lee, Yong Kyu Won, Jong Myoung Program of Paper Science and Engineering Division of Forest Material Science and Engineering College of Forest and Environmental Sciences Kangwon National University Chuncheon24341 Korea Republic of

Fibrillation was attempted to determine the suitability of KOCC for the production of nanocellulose in order to utilize it as a high value added material, and the possibility of using fibrillated KOCC obtained therefrom as a papermaking additive was evaluated. A grinder was used for the fibrillation of KOCC. In order to investigate the fibrillation characteristics of KOCC, the changes of SEM images, Brookfield viscosity and degree of polymerization were measured. Also, the handsheets were prepared and the changes of major physical properties were investigated in order to evaluate the performance and applicability of fibrillated KOCC as an additive for linerboard manufacture. The fibrillation of KOCC was significantly delayed compared to the bleached chemical pulp, and the complete fibrillation was not achieved, probably due to the residual lignin content (kappa no. 19.36). It is difficult to produce nanocellulose without proper pretreatment. The average fiber length decreased to the level of fines at 20 times of grinding because KOCC was severely aged. As the fibrillation of KOCC proceeded, the degree of Brookfield viscosity continued to increase and the degree of polymerization showed a gradual decrease. Bulk, tear index, and burst index of paper were not significantly affected by the addition of fibrillated KOCC. However, it was found that the tensile index and stiffness could be improved by the combination of retention aid and fibrillated KOCC. © 2018 Korean Technical Assoc. of the Pulp and Paper Industry. All rights reserved.

关键词： Additives

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Influence of KOCC swelling by soaking after beating on pulp and paper properties

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Palpu Chongi Gisul/Journal of Korea Technical Association of the Pulp and Paper Industry 2018年第4期50卷 110-115页

作者： Kim, Jin Mo Hwang, Im Jeong Han, Jun Kyu Lee, Yong Kyu Won, Jong Myoung Program of Paper Science and Engineering Division of Forest Material Science and Engineering College of Forest and Environmental Sciences Kangwon National University Chuncheon24341 Korea Republic of

KOCC is used as a very important raw material in industrial paper manufacturing in Korea. However, as KOCC is repeatedly used as a raw material, the aging and hornification of the pulp becomes more severe, making it difficult to produce industrial paper of excellent strength. In order to solve these problems, various methods such as addition of virgin pulp, enzyme treatment, mechanical treatment and polymer additive have been applied. This study was carried out to evaluate the applicability of swelling treatment by soaking after beating in order to improve the quality of KOCC by environmentally friendly method. As a result of this study, the WRV of KOCC and UKP increased with increasing soaking time, while the freeness tended to decrease. The air permeability of KOCC handsheet showed a tendency to decrease by swelling due to soaking, but the opacity and bulk did not show any significant changes. The tensile index was slightly improved by soaking, but no significant changes were observed in the tear index and Taber stiffness. Considering the above results, although swelling due to soaking helps somewhat to improve some physical properties, it is difficult to expect the significant improvement of physical properties of paper only by a single swelling treatment. © 2015 Korean Technical Assoc. of the Pulp and Paper Industry. All rights reserved.

关键词： Air permeability

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Improvement of paper properties using white ledger CNF

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Palpu Chongi Gisul/Journal of Korea Technical Association of the Pulp and Paper Industry 2018年第4期50卷 71-76页

作者： Hwang, Im-Jeong Kim, Jin-Mo Lee, Yong-Kyu Won, Jong Myoung Program of Paper Science and Engineering Division of Forest Material Science and Engineering College of Forest and Environmental Sciences Kangwon National University Chuncheon24341 Korea Republic of

The effects of white ledger CNF addition on the drainage characteristics and paper properties were investigated in order to evaluate the possibility of white ledger CNF as a papermaking additive for improving paper properties. The white ledger CNF addition showed a tendency to delay the dewatering on the paper machine wire and did not show any difference from the HwBKP CNF. As a result of FAP (Final Air Permeability) measurement to predict the dewatering characteristic at the press part, the FAP value tended to be slightly increased by the addition of CNF, but the difference was not so large enough that the dewatering at press part would not be significantly deteriorated. The bulk was slightly decreased as white ledger CNF was added, but there was no difference according to the kind of raw materials used for CNF production. The air resistance was increased with the increase of white ledger CNF addition. The opacity of handsheet did not show a significant change even though white ledger CNF was added up to 2%. Tensile index, tear index and Taber stiffness of handsheet were all improved by white ledger CNF addition. Especially, tensile index was improved significantly by the addition of white ledger CNF addition. It was also confirmed that alkaline pretreatment of white ledger before grinding is not necessary when it is used as a papermaking additive. © 2015 Korean Technical Assoc. of the Pulp and Paper Industry. All rights reserved.

关键词： Additives

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Activatable NIR-II Photothermal Lipid Nanoparticles for Improved Messenger RNA Delivery

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Angewandte Chemie 2023年第25期135卷

作者： Dr. Benhao Li Dr. Mengyao Zhao Weiping Lai Dr. Xuanbo Zhang Bowei Yang Prof. Xiaoyuan Chen Prof. Qianqian Ni Departments of Diagnostic Radiology Surgery Chemical and Biomolecular Engineering and Biomedical Engineering Yong Loo Lin School of Medicine and Faculty of Engineering National University of Singapore Singapore 119074 Singapore Nanomedicine Translational Research Program NUS Centre for Nanomedicine Yong Loo Lin School of Medicine National University of Singapore Singapore 117597 Singapore Contribution: Investigation (lead) Writing - original draft (lead) Contribution: Investigation (supporting) Department of Chemistry State Key Laboratory of Molecular Engineering of Polymers and iChem Shanghai Key Laboratory of Molecular Catalysis and Innovative Material Fudan University Shanghai 200433 China Clinical Imaging Research Centre Centre for Translational Medicine Yong Loo Lin School of Medicine National University of Singapore Singapore 117599 Singapore Institute of Molecular and Cell Biology Agency for Science Technology and Research (A*STAR) Singapore 138673 Singapore Contribution: Funding acquisition (equal) Supervision (equal) Writing - review & editing (equal)

Endosomal escape remains a central issue limiting the high protein expression of mRNA therapeutics. Here, we present second near-infrared (NIR-II) lipid nanoparticles (LNPs) containing pH activatable NIR-II dye conjugated lipid (Cy-lipid) for potentiating mRNA delivery efficiency via a s timulus-responsive p hotothermal-promoted e ndosomal e scape d elivery (SPEED) strategy. In acidic endosomal microenvironment, Cy-lipid is protonated and turns on NIR-II absorption for light-to-heat transduction mediated by 1064 nm laser irradiation. Then, the heat-promoted LNPs morphology change triggers rapid escape of NIR-II LNPs from the endosome, allowing about 3-fold enhancement of enhanced green fluorescent protein (eGFP) encoding mRNA translation capacity compared to the NIR-II light free group. In addition, the bioluminescence intensity induced by delivered luciferase encoding mRNA in the mouse liver region shows positive correlation with incremental radiation dose, indicating the validity of the SPEED strategy.

关键词： Endosomal Escape Lipid Nanoparticle Photothermal Effect Second Near-Infrared Window

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An effect of humid climate on micro structure and chemical component of natural composite (Boehmeria nivea-Albizia falcata) based wind turbine blade 2

An effect of humid climate on micro structure and chemical c...

引用

2nd International Conference on Energy, Environmental and Information System, ICENIS 2017

作者： Sudarsono, S. Purwanto, P. Sudarsono, Johny W. Department of Mechanical Engineering Institut Sains Dan Teknoogi AKPRIND Yogyakarta Indonesia Department of Chemical Engineering Faculty of Engineering Universitas Diponegoro Indonesia Doctoral Program of Environmental Science School of Postgraduate Studies Universitas Diponogero Semarang Indonesia Depart. of Material and Metallurgy Faculty of Engineering Universitas Indonesia Jakarta Indonesia

In this work, wind turbine blade NACA 4415 is fabricated from natural composite of Boehmeria nivea and Albizia falcate. The composite fabrication method used is hand lay up method. The aim of the work is to investigate an effect of humid climate of coastal area on micro structure and chemical composition of composite material of the blade. The wind turbine is tested at Pantai Baru, Bantul, Yogyakarta for 5.5 months. The micro structure scanning is performed with Scanning Electron Microscope (SEM) and material component is measured with Energy Dispersive X-ray spectrometer (EDS). The samples are tested before and after the use within 5.5 month at the location. The results show that composite material inexperienced interface degradation and insignificant change of micro structure. From EDS test, it is observed that Na filtration reduces C and increases O in composite material after 5.5 months. © 2018 The Authors, published by EDP sciences.

关键词： Microstructure

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Microstructural and Micro-Chemical Evolutions in Irradiated UCO Fuel Kernels of AGR-1 and AGR-2 TRISO Fuel Particles

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Journal of Physics: Conference Series 2021年第1期2048卷

作者： Zhenyu Fu Yong Yang Isabella J. Van Rooyen Subhashish Meher Boopathy Kombaiah Nuclear Engineering Program Department of Materials Science and Engineering University of Florida PO Box 116400 100 Rhines Hall Gainesville FL 32611 USA Fuel Design and Development Department Idaho National Laboratory Idaho Falls ID 83415-6188 USA Material Science Department Idaho National Laboratory Idaho Falls ID 83415-6188 USA Advanced Characterization Department Idaho National Laboratory Idaho Falls ID 83415-6188 USA

AGR-1 and AGR-2 tristructural-isotropic (TRISO) fuel particles were fabricated using slightly different fuel kernel chemical compositions, modified fabrication processes, different fuel kernel diameters, and changed 235U enrichments. Extensive microstructural and analytical characterizations were conducted to correlate those differences with the fuel kernels' responses to neutron irradiations in terms of irradiated fuel microstructure, fission products' chemical and physical states, and fission gas bubble evolutions. The studies used state-of-the-art transmission electron microscopy (TEM) equipped with energy-dispersive x-ray spectroscopy (EDS) via four silicon solid-state detectors with super sensitivity and rapid speed. The TEM specimens were prepared from selected AGR-1 and AGR-2 irradiated fuel kernels exposed to safety testing after irradiation. The particles were chosen in order to create representative irradiation conditions with fuel burnup in the range of 10.8 to 18.6% fissions per initial metal atom (FIMA) and time-average volume-average temperatures varying from 1070 to 1287°C. The 235U enrichment was 19.74 wt.% and 14.03 wt.% for the AGR-1 and AGR-2 fuel kernels, respectively. The TEM results showed significant microstructural reconstructions in the irradiated fuel kernels from both the AGR-1 and AGR-2 fuels. There are four major phases: fuel matrix of UO2 and UC, U2RuC2, and UMoC2—in the irradiated AGR-2 fuel kernel. Zr and Nd form a solid solution in the UC phase. The UMoC2 phase often features a detectable concentration of Tc. Pd was mainly found to be located in the buffer layer or associated with fission gas bubbles within the UMoC2 phase. EDS maps qualitatively show that rare-earth fission products (Nd et al.) preferentially reside in the UO2 phase. In contrast, in the irradiated AGR-1 fuel kernel, no U2RuC2 or UMoC2 precipitates were positively identified. Instead, there was a high number of rod-shaped precipitates enriched with Ru, Tc, Rh, and Pd

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