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Photonics Research 2023年第6期11卷 897-905页

作者： JINHYEONG yoon JAE-YONG kim JUNHYEONG kim HYEONHO yoon BERKAY NESELI HYO-HOON PARK HAMZA KURT School of Electrical Engineering Korea Advanced Institute of Science and Technology(KAIST)DaejeonRepublic of Korea

Efficient extraction of light from a high refractive index silicon waveguide out of a chip is difficult to *** inverse design approach was employed using the particle swarm optimization method to attain a vertical emitting meta-grating coupler with high coupling efficiency in a 220-nm-thick silicon-on-insulator *** carefully selecting the figure of merit and appropriately defining parameter space,unique L-shape and U-shape grating elements that boosted the out-of-plane radiation of light were *** addition,a 65.7%(-1.82 dB)outcoupling efficiency and a 60.2%(-2.2 dB)fiber-to-chip vertical coupling efficiency with an 88 nm 3 dB bandwidth were demonstrated by numerical *** fabrication constraints,the optimized complex meta-grating coupler was modified to correspond to two etching steps and was then fabricated with a complementary metal-oxide-semiconductor-compatible *** modified meta-grating coupler exhibited a simulated coupling efficiency of 57.5%(-2.4 d B)with a 74 nm 3-dB bandwidth in the C-band and an experimentally measured coupling efficiency of 38%(-4.2 dB).

关键词： waveguide coupling insulator

Adsorption properties of polycarboxylate ether-based superplasticizer on cement particles and their resultant dispersion

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Frontiers of Structural and Civil Engineering 2022年第4期16卷 506-514页

作者： Jinyoung yoon Byoung Il CHOI Jae Hong kim Department of Structural Engineering Research Korea Institute of Civil Engineering and Building Technology(KICT)Goyang 10223Republic of Korea System Safety Research Department Korea Shipbuilding and Offshore EngineeringSeongnam 13591Republic of Korea Department of Civil and Environmental Engineering Korea Advanced Institute of Science and TechnologyDaejeon 34141Republic of Korea

The cement dispersion performance of a polycarboxylate(PCE)-based superplasticizer is highly related to their adsorption behaviors as a function of *** study evaluated effects of PCEs on rheological properties of cementitious ***,characteristics of PCEs were characterized via permeation chromatography(GPC)and Fourier-transform infrared spectrometry(FT-IR).The adsorption behavior of single and blended PCEs on cementitious composites was identified using total organic carbon analyzer(TOC).Based on the measurement of PCE adsorption,the changes of rheological properties of cementitious materials as well as the number of dispersed cement particles were characterized using a rheometer and laser spectroscopy,*** experimental results support the systematic mechanism of PCE adsorption,cement dispersion,and the decrease in viscosity of cementitious materials.

关键词： adsorption polycarboxylate superplasticizer rheology dispersion

NIR-Ⅱ thiopyrylium dyads guided photodynamic inactivation of coronavirus

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Science China Chemistry 2023年第7期66卷 1877-1878页

作者： Yunjie Xu Changyu yoon Jong Seung kim Department of Chemistry Korea UniversitySeoul 02841Korea

COVID-19,a highly contagious respiratory infection caused by the SARS-Co V-2 virus,was first identified in December 2019 and has rapidly expanded to become a global pandemic[1].From then on,millions of people were infected,while the exact number of infections is difficult to determine,as not all people who are infected with the virus get tested,and some may not show any symptoms,and the number is rising as the pandemic *** sickness is characterized by fever,cough.

关键词： respiratory infected infection

Introduction to the Special Issue on“Innovation and Application of Intelligent Processing of Data,Information and Knowledge in E-Commerce”

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Computer Modeling in Engineering & Sciences 2022年第4期131卷 19-21页

作者： Honghao Gao Jung yoon kim Yuyu Yin School of Computer Engineering and Science Shanghai UniversityShanghaiChina Department of Game Media College of Future IndustryGachon UniversitySeongnam-si13120Gyeonggi-doSouth Korea School of Computer Hangzhou Dianzi UniversityHangzhouChina

In the context of E-Commerce eco-system,there are hundreds of millions of consumers,thousands of businesses and shops,and hundreds of delivery *** E-Commerce businesses such as Alibaba Group need to support a large number of applications and business modules,and cater for hundreds of business requirements and independent changes on a daily *** intersection of these information technologies and business models provides ample research opportunities in intelligent processing of data,information and *** this special issue,we have accepted 7 papers from open calls and invitations.A summary of these papers is outlined below.

关键词： hundreds intersection invitation

Stroke Based Painterly Rendering with Mass Data through Auto Warping Generation

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Computer Modeling in Engineering & Sciences 2022年第3期130卷 1441-1457页

作者： Taemin Lee Beomsik kim Sanghyun Seo Kyunghyun yoon Davinci SW Education Institute Chung-Ang UniversitySeoul06974South Korea School of Computer Science and Engineering Chung-Ang UniversitySeoul06974South Korea College of Art&Technology Chung-Ang UniversityGyeonggi-do17546South Korea

Painting is done according to the artist’s *** most representative of the style is the texture and shape of the brush *** simulations allow the artist’s painting to be produced by taking this stroke and pasting it onto the *** is called stroke-based *** quality of the result depends on the number or quality of this stroke,since the stroke is taken to create the *** is not easy to render using a large amount of information,as there is a limit to having a stroke *** this work,we intend to produce rendering results using mass data that produces large amounts of strokes by expanding existing strokes through *** this,we have produced results that have higher quality than conventional ***,we also compare the correlation between the amount of data and the results.

关键词： Painterly rendering stroke based rendering image mass data stroke warping non-photorealistic rendering

Throughput-oriented associated transaction assignment in sharding blockchains for IoT social data storage

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Digital Communications and Networks 2022年第6期8卷 885-899页

作者： Liping Tao Yang Lu Xu Ding Yuqi Fan Jung yoon kim School of Computer Science and Information Engineering Hefei University of TechnologyHefei230009China Engineering Research Center of Safety Critical Industrial Measurement and Control Technology Ministry of EducationHefei University of TechnologyHefei230009China Institute of Industry&Equipment Technology Hefei University of TechnologyHefei230009China Key Laboratory of Knowledge Engineering with Big Data(Hefei University of Technology) Ministry of EducationHefei230009China Graduate School of Game Gachon UniversitySeongnam-Si461-701South Korea

Blockchain is a viable solution to provide data integrity for the enormous volume of 5G IoT social data, while we need to break through the throughput bottleneck of blockchain. Sharding is a promising technology to solve the problem of low throughput in blockchains. However, cross-shard communication hinders the effective improvement of blockchain throughput. Therefore, it is critical to reasonably allocate transactions to different shards to improve blockchain throughput. Existing research on blockchain sharding mainly focuses on shards formation, configuration, and consensus, while ignoring the negative impact of cross-shard communication on blockchain throughput. Aiming to maximize the throughput of transaction processing, we study how to allocate blockchain transactions to shards in this paper. We propose an Associated Transaction assignment algorithm based on Closest Fit (ATCF). ATCF classifies associated transactions into transaction groups which are then assigned to different shards in the non-ascending order of transaction group sizes periodically. Within each epoch, ATCF tries to select a shard that can handle all the transactions for each transaction group. If there are multiple such shards, ATCF selects the shard with the remaining processing capacity closest to the number of transactions in the transaction group. When no such shard exists, ATCF chooses the shard with the largest remaining processing capacity for the transaction group. The transaction groups that cannot be completely processed within the current epoch will be allocated in the subsequent epochs. We prove that ATCF is a 2-approximation algorithm for the associated transaction assignment problem. Simulation results show that ATCF can effectively improve the blockchain throughput and reduce the number of cross-shard transactions.

关键词： IoT social data Blockchain Shar ding Associated transactions Transaction assi gnment

Dwindling in the mountains: Description of a critically endangered and microendemic Onychodactylus species(Amphibia, Hynobiidae) from the Korean Peninsula

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Zoological Research 2022年第5期43卷 750-755页

作者： Amael Borzee Yucheol Shin Nikolay APoyarkov Jong yoon Jeon Hae Jun Baek Chang Hoon Lee Junghwa An yoon Jee Hong Mi-sook Min Laboratory of Animal Behaviour and Conservation College of Biology and the EnvironmentNanjing Forestry UniversityNanjingJiangsu 210037China Department of Biological Sciences School of Natural ScienceKangwon National UniversityChuncheon 24341Republic of Korea Department of Vertebrate Zoology Biological FacultyM.V.Lomonosov Moscow State UniversityMoscow 119234Russia Research Institute for Veterinary Science College of Veterinary MedicineSeoul National UniversitySeoul 08826Republic of Korea Animal Resources Division National Institute for Biological ResourcesIncheon 22689Republic of Korea

DEAR EDITOR,Species that are not formally described are generally not targets for conservation,regardless of their threatened *** habitat degradation has increased over the past several decades in the Republic of Kore... 详细信息

关键词： habitat endangered mountains

Targeted down-regulation of Hipp1 ameliorates tau-induced deficits in Drosophila melanogaster

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Genes & Diseases 2023年第6期10卷 2248-2251页

作者： Sung Yeon Park Jieun Seo Seulbee Lee Joohyung kim Sang Jeong kim Seungbok Lee Yang-sook Chun Ischemic/Hypoxic Disease Institute Seoul National University College of MedicineSeoul 03080Republic of Korea Department of Biomedical Sciences Seoul National University College of MedicineSeoul 03080Republic of Korea Department of Physiology Seoul National University College of MedicineSeoul 03080Republic of Korea Department of Brain and Cognitive Sciences Seoul National UniversitySeoul 08826Republic of Korea Department of Cell and Developmental Biology and Dental Research Institute Seoul National UniversitySeoul 08826Republic of Korea

Tauopathies,such as Alzheimer's disease(AD),are neurodegenerative diseases characterized by the deposition of neurofibrillary tangles comprising hyperphosphorylated tau protein in the human brain.1 Given that abnormal epigenetic alterations in heterochromatin configuration have been documented in AD patients and transgenic animal models of AD,2 we investigated the roles of novel heterochromatin-associated interactors3 in *** transgenic flies via UAS-Gal4 binary system,we found that knockdown of Hipp1(HP1a and insulator partner protein-1)3 ***4ow(referred to as"tau"hereafter for simplicity)2-induced locomotion defects,reduced lifespan,and degeneration of brain ***,Hipp1 knockdown restored tau-driven aberrant expression of putative insulator targets and aberrant insulator-mediated epigenetic ***1 may have a role as an insulator-binding partner regarding being implicated in tauinduced neurodegeneration.

关键词： tau alterations degeneration

Wearable sensors and supercapacitors using electroplated-Ni/ZnO antibacterial fabric

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Journal of Materials Science & Technology 2022年第5期100卷 254-264页

作者： Taegun kim Chanwoo Park Edmund P.Samuel Yong-Il kim Seongpil An Sam S.yoon School of Mechanical Engineering Korea UniversitySeoul 02841Republic of Korea KU-KIST Green School Korea UniversitySeoul 136-713Republic of Korea SKKU Advanced Institute of Nanotechnology(SAINT)and Department of Nano Engineering Sungkyunkwan University(SKKU)Suwon 16419Republic of Korea

Herein,nickel nanocones and zinc oxide nanosheets were electroplated onto a fabric to produce multifunctional(wearable,stretchable,washable,hydrophobic,and antibacterial)materials with sensing,heating,and supercapacitive *** these functionalities are integrated into a one-layered fabric that can be used as a portable intelligent electronic textile for potential application in healthcare monitoring,smart sportswear,and energy *** nickel enhances the electrical conductivity and thus increases the electron charge transfer for supercapacitor *** integration of ZnO with the Ni-plated fabric provides pseudocapacitance via redox reactions with the *** resistance of the Ni/ZnO fabric changes in response to external stimuli such as temperature and *** voltage is applied,the fabric generates heat through Joule heating,demonstrating its potential application as winter *** superior mechanical durability of the fabric was confirmed through bending and stretching *** hydrophobic surface prevents viruses contained in liquid droplets from infiltrating the *** addition,bacterial growth is inhibited because of the antibacterial properties of the Ni/ZnO fabric and because of Joule *** one-layered fabric integrated with such multiple functionalities is expected to be applicable in the development of next-generation portable and wearable electronic textiles in various industries.

关键词： Multifunctional conductive fabric Fabric supercapacitor Fabric heater Thermal and strain sensors Electroplating

Heterojunction between bimetallic metal-organic framework and TiO_(2):Band-structure engineering for effective photoelectrochemical water splitting

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Nano Research 2022年第9期15卷 8502-8509页

作者： Ji Won yoon Jae-Hyeok kim Young-Moo Jo Jong-Heun Lee Department of Materials Science and Engineering Korea UniversitySeoul 02841Republic of Korea

Bimetallic Fe/Ni-based metal-organic frameworks(MOFs)with different Fe/Ni ratios were coated on TiO_(2)nanorods(NRs),and the performances of the heterojunction photoanodes in photoelectrochemical water splitting were *** bandgaps and band positions of the MOFs could be modulated by changing the ratio of the Fe and Ni *** ideal band alignment was achieved between the TiO_(2)NRs and bimetallic MOFs with an optimum ratio of[Fe]/[Ni]=0.25/0.75,which allowed efficient light absorption and charge *** coating of NH_(2)-MIL(Fe)-88 layer on the TiO_(2)NRs decreased the photocurrent density by 33%.In comparison,TiO_(2)/NH_(2)-MIL(Ni)-88 showed a modest improvement in photocurrent density(0.85 mA·cm^(−2)at 1.23 V vs.a reversible hydrogen electrode(RHE)).When bimetallic NH_(2)-MIL(Fe_(0.25)Ni_(0.75))-88 was coated on the TiO_(2)NRs,the photocurrent density reached 1.56 mA·cm^(−2),which was an efficiency enhancement of 3.2 *** mechanism underlying high photoelectrochemical performance was investigated.

关键词： band-structure engineering bimetallic metal-organic frameworks(MOFs) solar water splitting TiO_(2)nanorods NH_(2)-MIL-88