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Brain age estimation:premise,promise,and problems

2014年中国作物学会学术年会

作者： Jeong-Ro Lee Susanna-Choi Na-Young Ro ho-cheol ko Jeong-Suk Sung Taek-Ryun kown Young-Yi Lee Jae-Gyun Gwag National Agrobiodiversity Center National Academy of Agricultural ScienceRural Development Administration

Sesquiterpene lactones(SLs) are a group of over 500 compounds,characteristic of the Asteraceae and sporadically occurring in other plant *** are interesting from the chemical and chemotaxonomic point of view,and show anti-tumour,anti-leukaemic,anti-cardiovascular disease,reduction of inflammation,anti-microbial *** have been indicated as a property connected to appetite and digestion promotion in *** of folk medicines also implicate SLs as the active ingredient in many treatments for other ailments such as diarrhea,burns,influenza,and *** of 266 accessions of lettuce(Lactuca sativa) germplasm introduced from 43 countries conserved in RDA genebank was used this *** was extracted by methanol from freeze-dried lettuce leaves,sampled at bolting *** SLs compounds,lactucin,lactucopicrin and 8-deoxylactucin,was quantified by *** range of lactucin content showed trace 120.0 μg/g of dried leaves and average was 19.0±1.3,and distribution range trace 488.1 μg and average 16.8±2.9 in 8-deoxylactucin content,and distribution range trace1,189.0 μg and average 195.2±9.9 in lactucopicrin content,and distribution range17.4,299.9 μg and average 231.0±11.4 in total SLs *** lettuce have lowest average total SLs content,on the contrary romaine have highest SLs content and ***,wild relatives,have higher than *** accessions have lowest average total SLs content and Great Britain accessions showed highest SLs *** showed higher than bred *** two accessions have more than500μg of total SLs and seventeen accessions have less than 50μg of total *** germplasm can be used as low SLs content cultivar breeding or high SLs content cultivar breeding sources as well as research materials for medical treatment such as,anti-tumour,anti-leukaemic,and antimicrobial activities,etc.

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Neural Regeneration Research 2025年第8期20卷 2313-2314页

作者： Jarrad Perron Ji Hyun ko Graduate Program in Biomedical Engineering Price Faculty of EngineeringUniversity of ManitobaWinnipegMBCanada PrairieNeuro Research Centre Kleysen Institute for Advanced MedicineHealth Sciences CentreWinnipegMBCanada Department of Human Anatomy and Cell Science Rady Faculty of Health SciencesUniversity of ManitobaWinnipegMBCanada

Premise:The com bined effects of modern healthcare practices which prolong lifespan and declining birthrates have created unprecedented changes in age demographics worldwide that are especially pronounced in Japan,South korea,Europe,and North *** old age is the most significant predictor of dementia,global healthcare systems must rise to the challenge of providing care for those with neurodegenerative disorders.

关键词： estimation providing birth

Mechanical properties and corrosion resistance of low rigidity quaternary titanium alloy for biomedical applications

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中国有色金属学会会刊：英文版 2009年第4期19卷 862-865页

作者： Han-cheol ChoE Viswanat han S.SAJI Yeong-Mu ko Department of Dental Materials College of DentistryChosun University

Electrochemical corrosion of Ti-35Nb-5Ta-7Zr alloy fabricated by arc melting and heat treatment process was studied in 0.9% NaCl at(37±1) ℃.Phase and microstructure of the fabricated alloy were investigated using X-ray diffractometer and scanning electron *** properties such as yield strength and elastic modulus of the alloy were determined by tensile *** polarization technique and impedance spectroscopy were employed to study the corrosion *** results of the study were compared with those obtained for Ti-6Al-4V commercial *** result of the study supports feasibility of Ti-35Nb-5Ta-7Zr alloy for implant applications.

关键词：生物医学应用钛合金力学性能耐腐蚀性扫描电子显微镜四元刚性 X射线衍射仪

Fish-on-Chips:unveiling neural processing of chemicals in small animals through precise fluidic control

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Neural Regeneration Research 2024年第11期19卷 2351-2353页

作者： Samuel K.H.Sy ho ko Division of Neurology Department of Medicine and TherapeuticsFaculty of MedicineThe Chinese University of Hong KongShatinNew TerritoriesHong Kong Special Administrative RegionChina Li Ka Shing Institute of Health Sciences Faculty of MedicineThe Chinese University of Hong KongShatinNew TerritoriesHong Kong Special Administrative RegionChina Department of Electrical and Electronic Engineering Faculty of EngineeringThe University of Hong KongPok Fu LamHong Kong IslandHong Kong Special Administrative RegionChina Advanced Biomedical Instrumentation Center Hong Kong Science ParkPak Shek KokNew TerritoriesHong Kong Special Administrative RegionChina Margaret K.L.Cheung Research Center for Management of Parkinsonism Faculty of MedicineThe Chinese University of Hong KongShatinNew TerritoriesHong Kong Special Administrative RegionChina Lau Tat-chuen Research Center of Brain Degenerative Diseases in Chinese Faculty of MedicineThe Chinese University of Hong KongShatinNew TerritoriesHong Kong Special Administrative RegionChina Gerald Choa Neuroscience Institute The Chinese University of Hong KongShatinNew TerritoriesHong Kong Special Administrative RegionChina

Precise chemical cue presentation alongside advanced brainwide imaging techniques is important to the study of chemosensory processing in ***,the dynamic nature of chemical-carrying media,such as water or air,poses a significant challenge for delivering highly-controlled chemical flow to an animal ***,contact-based cue manipulation and delivery easily shift the position of the animal subject,which is often undesirable for high-quality brain ***,more advanced interfacing tools that align with the diverse range of body part sizes of an animal,ranging from micrometer-scale neurons to meter-long limbs,are much *** is particularly crucial when dealing with dimensions that are beyond the reach of conventional experimental tools.

关键词： dealing precise sizes

Multidimensional Hybrid Architecture Encapsulating Cobalt Oxide Nanoparticles into Carbon Nanotube Branched Nitrogen-Doped Reduced Graphene Oxide Networks for Lithium–Sulfur Batteries

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Energy & Environmental Materials 2022年第2期5卷 555-564页

作者： Jeong Seok Yeon Young Hun ko Tae ho Park Hyunyoung Park Jongsoon Kim ho Seok Park School of Chemical Engineering College of EngineeringSungkyunkwan University2066Seobu-roJangan-guSuwon-si Gyeonggi-do 440-746Korea Advanced Batteries Research Center Korea Electronics Technology Institute25Saenari-roBundang-guSeongnam-si Gyeonggi-do 13509Korea Department of Energy Science Sungkyunkwan University2066Seobu-roJangan-guSuwon-si Gyeonggi-do 440-746Korea Department of Health Sciences and Technology Samsung Advanced Institute for Health Sciences and Technology(SAIHST)Sungkyunkwan University2066SeoburoJangan-guSuwon 440-746South Korea

Lithium–sulfur batteries(LSBs)are regarded as promising candidates for the next-generation energy storage devices owing to their high-theoretical capacity(1675 mAh g^(−1))and affordable ***,several limitations of LSBs such as the lithium polysulfide shuttle,large volume expansion,and low electrical conductivity of sulfur need to be resolved for practical *** address these limitations,herein,a multidimensional architectured hybrid(Co@CNT/nG),where Co_(3)O_(4) nanoparticles are encapsulated into threedimensional(3D)porous N-doped reduced graphene oxide interconnected with carbon nanotube(CNT)branches,is synthesized through a simple pyrolysis *** synergistic effect achieved through the homogeneously distributed and encapsulated Co_(3)O_(4) nanoparticles,the interconnected CNT branches,and the 3D hierarchical porous structure and N-doping of Co@CNT/nG significantly suppresses the shuttle effect of lithium polysulfides and enhances the conversion redox kinetics for the improved sulfur *** validate this effect through various measurements including symmetric cells,Li_(2)S nucleation,shuttle currents,Tafel slopes,diffusion coefficients,and post-mortem ***,Co@CNT/nG-70S-based LSB cells achieve a high-specific capacity of 1193.1 mAh g^(−1) at 0.1 C and a low capacity decay rate of 0.030%per cycle for 700 cycles at 5 C,delivering a high areal capacity of 5.62 mAh cm^(−2) even with a loading of 6.5 mg cm^(−2).

关键词： graphene/CNT hybrid lithium-sulfur batteries multidimensional architecture nanoparticle encapsulation redox promoter

Wintertime suspended sediment simulation in the Huanghai and East China Seas

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Acta Oceanologica Sinica 2005年第1期24卷 46-59页

作者： ChoI Byung ho MUN Jong Yoon ko Jin Seok Department of Civil and Environmental Engineering Sungkyunkwan Unversity Suwon 440-746 KoreaDepartment of Civil and Environmental Engineering Sungkyunkwan Unversity Suwon 440-746 KoreaHyein Engineering & Construction Co Ltd 761 Shingil 7 dong Yungdungpogu Seoul 150-057 Korea

A simulation of suspended sediment movement relating to tidal and wave forcing during a winter monsoon in November 1983 in the Huanghai and East China Seas continental shelf is attempted by using the model describing the cohesive/non-cohesive sediment resus-pension generated by interactions between currents and *** simulation showed that sediment concentration was increased by resuspension at shallow depths during the strong storm conditions due to high bottom stress interacted between currents and waves. This result is in general agreement with observations in horizontal distribution of suspended sediment distribution. At three current meter mooring positions off the southern Shandong Peninsula resuspension occurred only at a depth of 22 m,nearest coastal position and at deeper parts at depths of 51 and 80 m wave-current interaction effects were not significant. It has shown that the present model simulation demonstrated the capability of reproduction of suspended sediment movement under wintertime extreme event reasonably well.

关键词： Huanghai Sea sediment transport model time slice experiment sediment concentration

Surface characteristics of HA coated Ti-Hf binary alloys after nanotube formation

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中国有色金属学会会刊：英文版 2009年第4期19卷 852-856页

作者： Yong-hoon JEONG Won-Gi KIM Geun-Hyeong PARK Han-cheol ChoE Yeong-Mu ko Department of Dental Materials & Research Center of Nano-Interface Activation for Biomaterials College of DentistryChosun University Research Center for Oral Disease Regulation of the Aged College of DentistryChosun University

Ti-Hf binary alloys contained 10%,20%,30% and 40%(mass fraction)Hf were manufactured in the vacuum furnace *** then,specimens were homogenized for 24 h at 1 000 ℃ in argon *** formation of oxide nanotubes was conducted by anodic oxidation on the Ti-Hf alloy in 1 mol/L H3PO4 electrolytes containing small amounts of NaF at room *** hydroxyapatite(HA) coating made of tooth ash prepared by electron-beam physical vapor deposition(EB-PVD) *** corrosion behaviors of the specimens were examined through potentiodynamic test in 0.9% NaCl solution by *** microstructures of the alloys were examined by field emission scanning electron microscopy(FE-SEM) and x-ray diffractometer(XRD).It was observed that the lamellar structure translated to needle-like structure with Hf *** formed and HA coated Ti-xHf alloys had a good corrosion resistance.

关键词：二元合金 HA涂层纳米管表面特性管形 0.9%NaCl溶液物理气相沉积铪

2D spinel ZnCo_(2)O_(4) microsheet-coated functional separator for promoted redox kinetics and inhibited polysulfide dissolution

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Journal of Energy Chemistry 2021年第4期30卷 468-475页

作者： Jeong Seok Yeon Tae ho Park Young Hun ko Periyasamy Sivakumar Jun Su Kim Youngkywon Kim ho Seok Park School of Chemical Engineering Sungkyunkwan UniversitySuwon 16419Gyeonggi-doRepublic of Korea Advanced Batteries Research Center Korea Electronics Technology InstituteSeongnam 13509Gyeonggi-doRepublic of Korea Department of Health Sciences and Technology Samsung Advanced Institute for Health Sciences and Technology(SAIHST)Sungkyunkwan UniversitySuwon 16419Gyeonggi-doRepublic of Korea Department of Chemistry Dongguk University-Seoul CampusJung-gu 04620 SeoulRepublic of Korea

Lithium-sulfur(Li-S)batteries are receiving increasing attention as one of the potential next-generation batteries,owing to their high energy densities and low ***,practical Li-S batteries with high energy densities are extremely hindered by the sulfur loss,low Coulombic efficiency,and short cycling life originating from the polysulfide(LiPS)*** this study,two-dimensional(2D)ZnCo_(2)O_(4) microsheets fabricated by a facile hydrothermal process are employed to modify the separator,for improving the electrochemical performances of Li-S *** resulting 2D Zn Co_(2)O_(4)-coated separator features a coating thickness of approximately 10 lm,high ionic conductivity of 1.8 m S/cm,and low mass loading of 0.2 mg/cm^(2).This 2D ZnCo_(2)O_(4)-coated separator effectively inhibits Li PS shuttle by a strong chemical interaction with Li PS as well as promotes the redox kinetics by Zn CO2O4-coated layers,as determined by X-ray photoelectron spectroscopy analysis,self-discharge,time-dependent permeation test,Li symmetric cell test,and Li2S nucleation ***,the Li-S batteries based on the 2D Zn Co_(2)O_(4)-coated separator exhibit a high initial discharge capacity of 1292.2 m Ah/g at 0.1 ***,they exhibit excellent long cycle stability at 1 and 2 C with capacity retention of 84%and 86%even after800 cycles,corresponding to a capacity fading rate of 0.020%and 0.016%per cycle,***,these Li-S cells with a high sulfur loading at 5.3 mg/cm^(2) and low electrolyte concentration of 9 l L/mg deliver a high discharge capacity of 4.99 m Ah/cm^(2) after 200 cycles at 0.1 C.

关键词： Lithium sulfur batteries Functional separator 2D microsheet Polysulfide Redox kinetics

Programmable directional color dynamics using plasmonics

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Microsystems & Nanoengineering 2024年第1期10卷 325-334页

作者： Gyurin Kim Doeun Kim Soeun ko Jang-Hwan Han Juhwan Kim Joo Hwan ko Young Min Song Hyeon-ho Jeong School of Electrical Engineering and Computer Science Gwangju Institute of Science and TechnologyGwangju 61005Republic of Korea Department of Semiconductor Engineering Gwangju Institute of Science and TechnologyGwangju 61005Republic of Korea Artificial Intelligence(AI)Graduate School Gwangju Institute of Science and TechnologyGwangju 61005Republic of Korea

Adaptive multicolor filters have emerged as key components for ensuring color accuracy and resolution in outdoor visual ***,the current state of this technology is still in its infancy and largely reliant on liquid crystal devices that require high voltage and bulky structural ***,we present a multicolor nanofilter consisting of multilayered‘active’plasmonic nanocomposites,wherein metallic nanoparticles are embedded within a conductive polymer *** nanocomposites are fabricated with a total thickness below 100 nm using a‘lithography-free’method at the wafer level,and they inherently exhibit three prominent optical modes,accompanying scattering phenomena that produce distinct dichroic reflection and transmission ***,a pivotal achievement is that all these colors are electrically manipulated with an applied external voltage of less than 1 V with 3.5 s of switching speed,encompassing the entire visible ***,this electrically programmable multicolor function enables the effective and dynamic modulation of the color temperature of white light across the warm-to-cool spectrum(3250 K-6250 K).This transformative capability is exceptionally valuable for enhancing the performance of outdoor optical devices that are independent of factors such as the sun’s elevation and prevailing weather conditions.

关键词： directional prevailing exceptional