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Deep learning acceleration of multiscale superresolution localization photoacoustic imaging

Light(Science & Applications) 2022年第6期11卷 1166-1177页

作者： Jongbeom kim Gyuwon kim Lei Li Pengfei Zhang Jin young kim Yeonggeun kim Hyung Ham Kkim Lihong V.Wang Seungchul Lee Chulhong kim Departments of Electrical Engineering Mechanical EngineeringConvergence IT Engineeringand Interdisciplinary Bioscience and BioengineeringGraduate School of Artificial IntelligenceMedical Device Innovation CenterPohang University of Science and Technology(POSTECH)77 Cheongam-roNam-guPohangGyeongbuk 37673Republic of Korea Caltech Optical Imaging Laboratory Andrew and Peggy Cherng Department of Medical EngineeringDepartment of Electrical EngineeringCalifornia Institute of Technology1200 E.California Blvd.MC 138-78PasadenaCA 91125USA School of Precision Instruments and Optoelectronics Engineering Tianjin University92 Weijin RoadNankai DistrictTianjin 300072China Opticho 532CHANGeUP GROUND87 Cheongam-roNam-guPohangGyeongsangbuk 37673Republic of Korea

A superresolution imaging approach that localizes very small targets,such as red blood cells or droplets of injected photoacoustic dye,has significantly improved spatial resolution in various biological and medical imaging ***,this superior spatial resolution is achieved by sacrificing temporal resolution because many raw image frames,each containing the localization target,must be superimposed to form a sufficiently sampled high-density superresolution ***,we demonstrate a computational strategy based on deep neural networks(DNNs)to reconstruct high-density superresolution images from far fewer raw image *** localization strategy can be applied for both 3D label-free localization optical-resolution photoacoustic microscopy(OR-PAM)and 2D labeled localization photoacoustic computed tomography(PACT).For the former,the required number of raw volumetric frames is reduced from tens to fewer than *** the latter,the required number of raw 2D frames is reduced by 12 ***,our proposed method has simultaneously improved temporal(via the DNN)and spatial(via the localization method)resolutions in both label-free microscopy and labeled ***-learning powered localization PA imaging can potentially provide a practical tool in preclinical and clinical studies requiring fast temporal and fine spatial resolutions.

关键词： Deep frames networks

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Evaluation of immobilizing agents as soil quality conditioners in addition to their metal(loid) immobilizing effect

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Pedosphere 2022年第2期32卷 307-316页

作者： Chaw Su LWIN Mina LEE young-Nam kim Gary OWENS Kwon-Rae kim Department of Soil and Water Science Yezin Agricultural UniversityYezinNaypyitaw 15013Myanmar Department of Smart-Agro Industry Gyeongsang National UniversityJinju 52725Korea Institute of Agriculture and Life Science(IALS) Gyeongsang National UniversityJinju 52828Korea Environmental Contaminants Group Future Industries InstituteUniversity of South AustralianMawson Lakes SA 5095Australia

In trace metal (TM)-contaminated agricultural soils,management of TM availability is important for safe crop *** addition,maintenance or improvement of soil quality is vital for sustainable crop *** TM phytoavailability and increased soil quality can be achieved by the application of various immobilizing agents to soil,which can supply both macronutrients and organic *** study investigated the long-term influences of four common immobilizing agents on soil biogeochemical properties and the phytoavailability of TMs in mixed metal-contaminated soil from a cultivated upland near an abandoned mining *** (L),gypsum (G),fly ash (F),and animal manure-based compost (C) were applied to pots containing contaminated soil,either individually or in *** incubation for three years under sequential cultivation of two crops and fallow,soil biogeochemical properties were determined,and Brassica rapa plant bioassay was *** phytoavailability of all TMs (both cationic metals and anionic metalloids) remained significantly lower in soils treated with immobilizing agents even after three years,when compared with the no-agent control (CK) *** addition,the soil quality was significantly improved by treatment with immobilizing *** instance,the C and L+C treatments were the most effective in improving soil physical (bulk density,porosity,and water-resistant aggregate stability),chemical (pH,organic matter,total nitrogen,cation exchange capacity,and plant-available phosphorus,magnesium,and potassium),and biological (microbial biomass carbon and dehydrogenase activity) *** improvement of soil properties and lowering of TM bioavailability were also consistent with the most significant increase in *** biomass production observed in the C treatment,followed by the L+C,G+F,L,G,F,and L+G treatments,as compared with that in *** results indicate that the function of the TM-immobilizing agent as a soil qualit

关键词： crop production metal bioavailability metal immobilization metal phytoavailability soil amendments soil biogeochemical properties soil remediation trace metals

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Hydrogen spillover in nonreducible oxides:Mechanism and catalytic utilization

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Nano Research 2022年第12期15卷 10357-10365页

作者： Songhyun Lee Hyungjun kim Ryong Ryoo Jeong young Park Minkee Choi Charles D.Davidson School of Chemical Engineering Purdue UniversityWest LafayetteIndiana47907USA Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and TechnologyDaejeon34141Republic of Korea Department of Chemistry Korea Advanced Institute of Science and TechnologyDaejeon34141Republic of Korea KENTECH Laboratory for Chemical Environmental and Climate TechnologyKorea Institute of Energy Technology(KENTECH)200 Hyeoksin-roNaju58330Republic of Korea Center for Nanomaterials and Chemical Reactions Institute for Basic Science(IBS)Daejeon34141Republic of Korea

Hydrogen(H)spillover in nonreducible oxides such as zeolites and Al2O3 has been a highly controversial phenomenon in heterogeneous *** industrial catalysts are predominantly prepared using these materials as supports,it is important to understand the mechanism and catalytic functions of H spillover on their *** the past decade,fundamental studies on zeolite-encapsulated metal catalysts have revealed that H spillover and reverse spillover can be utilized in the design of hydrogenation and dehydrogenation catalysts with improved *** experimental and theoretical studies have indicated that H spillover can occur in nonreducible oxides when they possess substantial acid sites that aid the surface migration of active *** the present review,we will discuss the possible mechanisms of H spillover in nonreducible oxides and the unique opportunities of using this phenomenon for the design of advanced hydroprocessing catalysts.

关键词： hydrogen spillover nonreducible oxides zeolites hydroprocessing catalysts

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Deep Drawing Process Using a Tractrix Die for Manufacturing Liners for a CNG High-Pressure Vessel(Type Ⅱ)

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Chinese Journal of Mechanical Engineering 2022年第1期35卷 132-143页

作者： Gun‑young Park Hyo‑Seo Kwak Hyo‑Seong Jang Chul kim School of Mechanical Engineering Pusan National UniversityPusan 46241South Korea Department of Mechanical Engineering Dong-eui UniversityPusan 47340Korea.

The liner of a CNG pressure vessel is manufactured by a DDI(deep drawing and ironing)process for the cylinder part,which is a continuous process that includes a drawing process to reduce the diameter of the billet and a subsequent ironing process to reduce the thickness of the billet.A tractrix die used in the 1^(st) deep drawing allows the blank to flow smoothly by decreasing the punch load and radial tensile stress occurring in the *** also increases the draw ratio compared to conventional dies,but it causes forming *** this study,a shape coefficient(S_(c))is proposed for the tractrix die using the blank diameter(D_(0)),inflow diameter of the workpiece(d_(i)),and inflow angle of the workpiece(θ)for design of the tractrix *** effects of the thickness and inflow angle of the workpiece on wrinkling and folding were investigated through ***,a discriminant is proposed for the relative radial stress(σ)generated during the deep drawing process using the tractirx die and used to predict *** on the results,the blank thickness,the draw ratio,and the inflow of the workpiece angle in the 1^(st) deep drawing process are suggested,and the number of operations in the DDI process was reduced from 6 to *** improves the productivity and reduces the manufacturing cost.

关键词： Tractrix die Deep drawing Wrinkling Folding LDR(Limit draw ratio) FEM

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Comparative effects of soy protein concentrate,enzyme‑treated soybean meal,and fermented soybean meal replacing animal protein supplements in feeds on growth performance and intestinal health of nursery pigs

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Journal of Animal Science and Biotechnology 2023年第5期14卷 2033-2047页

作者： Zixiao Deng Marcos Elias Duarte So young kim Yunil Hwang Sung Woo kim Department of Animal Science North Carolina State University116 Polk HallCampus Box 7621RaleighNC 27695USA CJ Cheiljedang Seoul 04560Korea

Background Soy protein supplements,with high crude protein and less antinutritional factors,are produced from soybean meal by different *** study evaluated the comparative effects of various soy protein supplements replacing animal protein supplements in feeds on the intestinal immune status,intestinal oxidative stress,mucosaassociated microbiota,and growth performance of nursery *** Sixty nursery pigs(6.6±0.5 kg BW)were allotted to five treatments in a randomized complete block design with initial BW and sex as *** were fed for 39 d in 3 phases(P1,P2,and P3).Treatments were:Control(CON),basal diet with fish meal 4%,2%,and 1%,poultry meal 10%,8%,and 4%,and blood plasma 4%,2%,and 1%for P1,P2,and P3,respectively;basal diet with soy protein concentrate(SPC),enzyme-treated soybean meal(ESB),fermented soybean meal with Lactobacillus(FSBL),and fermented soybean meal with Bacillus(FSBB),replacing 1/3,2/3,and 3/3 of animal protein supplements for P1,P2,and P3,*** were analyzed using the MIXED procedure in SAS *** The SPC did not affect the BW,ADG,and G:F,whereas it tended to reduce(P=0.094)the ADFI and tended to increase(P=0.091)crypt cell *** ESM did not affect BW,ADG,ADFI,and G:F,whereas tended to decrease(P=0.098)protein carbonyl in jejunal *** FSBL decreased(P<0.05)BW and ADG,increased(P<0.05)TNF-α,and Klebsiella and tended to increase MDA(P=0.065)and IgG(P=0.089)in jejunal *** FSBB tended to increase(P=0.073)TNF-α,increased(P<0.05)Clostridium and decreased(P<0.05)Achromobacter and alpha diversity of microbiota in jejunal *** Soy protein concentrate,enzyme-treated soybean meal,and fermented soybean meal with Bacillus could reduce the use of animal protein supplements up to 33%until 7 kg body weight,up to 67%from 7 to 11 kg body weight,and entirely from 11 kg body weight without affecting the intestinal health and the growth performance of nursery *** soybean meal with

关键词： Enzyme-treated soybean meal Fermented soybean meal Intestinal health Nursery pigs Soy protein concentrate

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Uniform assembly of gold nanoparticles on S-doped g-C3N4 nanocomposite for effective conversion of 4-nitrophenol by catalytic reduction

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Journal of Materials Science & Technology 2020年第5期40卷 176-184页

作者： Vellaichamy Balakumar Hyungjoo kim Ji Won Ryu Ramalingam Manivannan young-A Son Department of Advanced Organic Materials Engineering Chungnam National University220 Gung-dongYuseong-guDaejeon305-764South Korea

In this work,a simple synthesis of sulfur doped graphitic carbon nitride(S-g-C3N4)act as a support cum stabilizers for gold nanoparticles(Au)and its was characterized by UV–vis and XRD to measure the absorbance and crystallinity,*** functional group and morphology of the samples were identified using FT-IR and ***,the Au@S-g-C3N4 nanocatalyst exhibits good catalytic performance and stability in the reduction of hazardous 4-nitrophenol(NP)compared to S-g-C3N4 using Na ***,the Au@S-g-C3N4 nanocomposite holds a good catalytic efficiency(near 100%)achieved by within 5 *** highest catalytic reduction of NP is due to the synergistic effect of Au nanoparticles decorated on *** fast electron transfer reduction mechanism was elucidated and *** reusability and stability of the developed nanocomposites were also observed in consecutive reduction *** filtering and catalyzing device was used for the direct conversion of NP polluted *** method can open a new avenue for the metal nanoparticles based carbon materials heterogeneous catalyst and its reduction of toxic contaminants.

关键词： Gold nanoparticles S-doped g-C3N4 Catalytic reduction 4-nitrophenol

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Measurement of combined flap thickness for reconstruction of decubitus ulcer using computed tomography

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World Journal of Clinical Cases 2023年第31期11卷 7562-7569页

作者： Eun Chan kim Jeong Do Park Syeo-young Wee Se-young kim Department of Plastic and Reconstructive Surgery Soonchunhyang University Gumi HospitalGyeonsangbuk-doGumi 39371South Korea

BACKGROUND Various reconstruction options have been introduced to treat decubitus ulcers.A combined flap that takes advantage of the fasciocutaneous and muscle flaps has been proven to be effective in reconstructing decubitus ulcers in previous ***,no studies have measured combined flap *** is the first study to demonstrate the superiority of the combined flap by measuring its thickness using enhanced abdominopelvic computed tomography(APCT).AIM To evaluate combined flap modality as a useful reconstruction option for decubitus ulcers using measurements obtained through *** Fifteen patients with paraplegia who underwent combined flap surgery for reconstruction of decubitus ulcers between March 2020 and December 2021 were *** defects in the skin and muscle components were reconstructed *** inner gluteus muscle flap was split and manipulated to obliterate dead *** outer fasciocutaneous flap was transposed to cover the muscle flap and opening of the decubitus ***,we performed enhanced APCT at 3 wk and 6 mo postoperatively to measure the flap *** The mean flap thickness was 32.85±8.89 mm at 3 wk postoperatively and 29.27±8.22 mm at 6 mo *** flap thickness was maintained without any major complications such as contour deformities or *** Although there was a significant decrease in flap thickness as measured by APCT,the combined flap provided sufficient padding and maintained its thickness even at 6 mo after reconstruction,suggesting that the combined flap modality may be a useful reconstruction option for patients with paraplegic decubitus ulcers.

关键词： Computed tomography Decubitus ulcer Ischium Surgical flaps Trochanter

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Remote Monitoring of Electric Vehicle Charging Stations in Smart Campus Parking Lot

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Journal of Modern Power Systems and Clean Energy 2020年第1期8卷 124-132页

作者： Mohamed A.Ahmed Mohamed R.El-Sharkawy young-Chon kim Department of Electronic Engineering Universidad Técnica Federico Santa MaríaValparaíso 2390123Chile Department of Communications and Electronics Higher Institute of Engineering&TechnologyKing MarriottAlexandria 23713Egypt Department of Automotive and Tractor Engineering Minia UniversityEl-Minia 61111Egypt Department of Computer Engineering Chonbuk National UniversityJeonju 561-756Korea

Smart parking lots are smart places capable of supporting both parking and charging services for electric vehicles(EVs).In order to manage EV charging,the parking lot local controller(PLLC)requires data exchange with EV charging stations(EVCSs)through communication ***,data losses and communication delays are unavoidable and may significantly degrade the system *** work aims to investigate the underlying communication networks for remote monitoring of EVCSs in a smart campus parking *** communication network consists of two subnetworks:parking area network(PAN)and campus area network(CAN).PAN covers communication among EVs,charging stations and PLLC,while CAN enables dedicated communication between PLLCs and a global controller of the *** one of the major obstacles in EV system is the lack of unified communication architecture to integrate EVCS in the power grid,we develop communication models for the in-vehicle system and EVCSs based on logical node concept of IEC 61850 ***,we implement network models for EVCSs using OPNET *** communication technologies and configurations are considered in modeling and simulations,and end-toend delay is evaluated and discussed.

关键词： Communication network electric vehicle(EV) electric vehicle charging station(EVCS) IEC 61850 OPNET smart parking lot

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Variable step-size affine projection algorithm based on global speech absence probability for adaptive feedback cancellation

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Journal of Central South University 2014年第2期21卷 646-650页

作者： kim young-Sear SONG Ji-hyun kim Sang-Kyun LEE Sangmin Department of Biomedical Engineering Eulji University Department of Electronic Engineering Inha University Institute for Information and Electronics Research Inha University

A novel approach is proposed for improving adaptive feedback cancellation using a variable step-size affine projection algorithm(VSS-APA) based on global speech absence probability(GSAP).The variable step-size of the proposed VSS-APA is adjusted according to the GSAP of the current *** weight vector of the adaptive filter is updated by the probability of the speech *** performance measure of acoustic feedback cancellation is evaluated using normalized *** results demonstrate that the proposed approach has better performance than the normalized least mean square(NLMS) and the constant step-size affine projection algorithms.

关键词： adaptive feedback cancellation affine projection global speech absence probability(GSAP)

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Variations in microstructure and bending formability of extruded Mg–Al–Zn–Ca–Y–MM alloy with precompression and subsequent annealing treatment conditions

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Journal of Magnesium and Alloys 2022年第9期10卷 2475-2490页

作者： Jong Un Lee Sang-Hoon kim Dong Hee Lee Hyun Ji kim young Min kim Sung Hyuk Park School of Materials Science and Engineering Kyungpook National UniversityDaegu 41566Republic of Korea Agency for Defense Development Daejeon 34186Republic of Korea Implementation Research Division Korea Institute of Materials ScienceChangwon 51508Republic of Korea

In this study, the bending formability of an extruded Mg–9Al–1Zn–0.3Mn–0.9Ca–0.6Y–0.5 MM(AZXWMM91100, wt%) alloy at room temperature is significantly improved through application of a combined precompression and subsequent annealing(PCA) treatment. As the amount of precompression applied along the extrusion direction(ED)(i.e., the total strain) increases from 4% to 6%, the area fraction of ED-oriented grains of the PCA-treated alloy increases, which consequently causes an improvement in its bending formability because these grains accommodate larger tensile strain along the ED during bending. As the temperature of the subsequent annealing treatment increases from 350 ℃ to 450 ℃, both the area fraction of the ED-oriented grains and the average grain size increase, and the residual dislocation density decreases owing to the promotion of boundary migration and occurrence of the recovery process at higher ***, the bending formability of both the 4%-precompressed and the 6%-precompressed samples increases with an increase in the annealing temperature. However, when the precompressed samples are annealed at 300 ℃, their bending formability is lower than that of the extruded alloy because the dislocations formed by precompression remain even after the subsequent annealing at this temperature.

关键词： Magnesium Extrusion Bending Formability Texture

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