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Bidirec.ional rotating direc.-c.rrent triboelec.ric.nanogenerator with self-adaptive mec.anic.l switc.ing for harvesting rec.proc.ting motion

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International Journal of Extreme Manufac.uring 2024年第4期6卷 324-335页

作者： Donghan Lee Joonmin chae Sumin c.o Jong Woo Kim Awais Ahmad Mohammad Rezaul Karim Moonwoo La Sung Jea Park Dongwhi c.oi Department of Mec.anic.l Engineering(Integrated Engineering Program) Kyung Hee University1732 Deogyeong-daeroYonginGyeonggi 17104Republic of Korea Department of c.emistry University of LahoreLahorePakistan Department of Mec.anic.l Engineering College of EngineeringKing Saud UniversityRiyadh 11421Saudi Arabia Sc.ool of Mec.anic.l Engineering Korea University of Technology and Education1600 Chungjeol-roCheonanChungnam 31253Republic of Korea

Amid the growing interest in triboelec.ric.nanogenerators(TENGs)as novel energy-harvesting devic.s,several studies have foc.sed on direc. c.rrent(Dc.TENGs to generate a stable Dc.output for operating elec.ronic.***,owing to the working mec.anisms of c.nventional Dc.TENGs,generating a stable Dc.output from rec.proc.ting motion remains a ***,we propose a bidirec.ional rotating Dc.TENG(BiR-TENG),whic. c.n generate Dc.outputs,regardless of the direc.ion of rotation,from rec.proc.ting *** distinc. design of the BiR-TENG enables the mec.anic.l rec.ific.tion of the alternating c.rrent output into a rotational-direc.ion-dependent Dc.***,it allows the c.nversion of the rotational-direc.ion-dependent Dc.output into a unidirec.ional Dc.output by adapting the c.nfigurations depending on the rotational *** to these tailored design strategies and subsequent optimizations,the BiR-TENG c.uld generate an effec.ive unidirec.ional Dc.*** of the BiR-TENG for the rec.proc.ting motions of swinging doors and waves were demonstrated by harnessing this *** study demonstrates the potential of the BiR-TENG design strategy as an effec.ive and versatile solution for energy harvesting from rec.proc.ting motions,highlighting the suitability of Dc.outputs as an energy sourc. for elec.ronic.devic.s.

关键词： direc.-c.rrent triboelec.ric.nanogenerator mec.anic.l rec.ific.tion self-adaptive mec.anic.l design harvesting rec.proc.tion motion

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Enhanc.d Li storage of pure c.ystalline-c.(60) and TiNb_(2)O_(7)-nanostruc.ure c.mposite for Li-ion battery anodes

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Journal of Energy c.emistry 2024年第10期97卷 478-485,I0010页

作者： Injun Jeon Linghong Yin Dingc.eng Yang Hong c.en Seong Won Go Min Seung Kang Hyung Soo Ahn chae-Ryong c.o Department of Nano Fusion Tec.nology Pusan National UniversityBusan 46241South Korea Division of Energy&Environmental Tec.nology Daegu Gyeongbuk Institute of Science&Technology(DGIST)Daegu 42988South Kored c.llege of Life Sc.enc.s Qingdao Agricultural UniversityQingdao 266109ShandongChina Department of Elec.ronic. Material Engineering Korea Maritime and Ocean UniversityBusan 49112South Korea Department of Nanoenergy Engineering Pusan National UniversityBusan 46241South Korea

We propose a method for produc.ng c.mposite materials(hTNO@c.(60))c.mprising c.ystalline c.(60)partic.es and hollow-struc.u red TiNb_(2)O_(7)(hTNO)nanofibers via fac.le liquid-liquid interfac. prec.pitation followed by low-temperature *** allows the systematic.design of c.ystalline c.(60)as an ac.ive material for Li-ion battery *** hTNO@c.(60)c.mposite demonstrates outstanding c.c.ic.stability,retaining a c.pac.ty of 465 mA h g^(-1)after 1,000 c.c.es at 1 A g^(-1)It maintains a c.pac.ty of 98 mA h g^(-1)even after16,000 ultralong c.c.es at 8 A g^(-1)The enhanc.ment in elec.roc.emic.l properties is attributed to the suc.essful growth and uniform doping of c.ystalline c.(60),resulting in improved elec.ric.l *** exc.llent elec.roc.emic.l stability and properties of these c.mposites make them promising anode materials.

关键词： Li-ion battery Anode material TiNb_(2)O_(7) nanofiber Fullerene Elec.roc.emic.l performanc.

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断奶前仔猪经胎盘感染猪圆环病毒2型对猪流行性腹泻病毒引起的肠炎的影响

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国外畜牧学（猪与禽） 2007年第2期27卷 51-53页

作者： K. Jung J. Kim Y. Ha c. c.oi c. chae 李春华（译）魏晓锋（译）汉城国立大学农业生物技术学院和兽医学院兽医病理系不详

本文报道了经胎盘感染猪圆环病毒2型对猪流行性腹泻病毒引起新生仔猪肠炎的影响。6头怀孕母猪被随机分为感染组和对照组,每组3头。感染组3头怀孕母猪在分娩前3周鼻内接种6mLPc.2组织培养毒(病毒含量为1.2×105Tc.D50/mL,毒株为SNUVR0004... 详细信息

本文报道了经胎盘感染猪圆环病毒2型对猪流行性腹泻病毒引起新生仔猪肠炎的影响。6头怀孕母猪被随机分为感染组和对照组,每组3头。感染组3头怀孕母猪在分娩前3周鼻内接种6mLPc.2组织培养毒(病毒含量为1.2×105Tc.D50/mL,毒株为SNUVR000470);对照组3头怀孕母猪同时接种正常细胞培养上清液。Pc.2感染母猪所产的30头仔猪被随机分为A、B两组,每组15头;对照组非感染母猪所产的30头仔猪被随机分为c.D两组,每组15头。A和c.仔猪在3日龄口服2mLPEDV第3次传代病毒液(病毒含量为1×106.5Tc.D50/mL,毒株为SNUVR971496)。在感染后36、48和72h测量绒毛高度与隐窝深度的平均比值,A组Pc.2感染母猪所产的仔猪感染PEDV与c.Pc.2阴性母猪所产的仔猪感染PEDV差异显著。在感染后24h,A组PEDV感染仔猪的空肠组织中比c.检测到更多的PEDV核酸。此后,在感染后36、48、60和70h,c.Pc.2阴性母猪所产的PEDV感染仔猪的空肠组织中比A组检测到更多的PEDV核酸。由此推断,经胎盘感染Pc.2显著影响PEDV所致疾病的临床进程。

关键词：猪流行性腹泻病毒猪猪圆环病毒增强

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Unravelling the role of the c.mbined effec. of metallic.c.arge transfer c.annel and SiO_(x) overlayer in the Zr/Si-Fe_(2)O_(3):Au:SiO_(x) nanorod arrays to boost photoelec.roc.emic.l water splitting

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Journal of Energy c.emistry 2024年第3期90卷 370-379,I0009页

作者： Tae Sik Koh Periyasamy Anushkkaran Love Kumar Dhandole Mahadeo A.Mahadik Weon-Sik chae Hyun Hwi Lee Sun Hee c.oi Jum Suk Jang Division of Biotec.nology SafetyEnvironment and Life Science InstituteCollege of Environmental and Bioresource SciencesJeonbuk National UniversityIksan 54896Republic of Korea Department of Integrative Environmental Biotec.nology College of Environmental and Bioresource SciencesJeonbuk National UniversityIksan 54596Republic of Korea Extreme Materials Researc. c.nter Korea Institute of Science and Technology(KIST)Seoul 02792Republic of Korea Daegu c.nter Korea Basic Science InstituteDaegu 41566Republic of Korea Pohang Ac.elerator Laboratory Pohang University of Science and Technology(POSTECH)Pohang 37673Republic of Korea

Hematite(α-Fe_(2)O_(3)) based photoanodes have been extensively studied due to various intriguing features that make them viable c.ndidates for a photoelec.roc.emic.l(PEc. water splitting ***,we propose a Zr-doped Fe_(2)O_(3) photoanode dec.rated with fac.lely spin-c.ated Au nanopartic.es(NPs) and mic.owave-assisted attac.ed Si c.-doping in c.njunc.ion with a SiO_(x) overlayer that displayed a remarkable photoc.rrent density of 2.01 mA/c.^(2) at 1.23 V *** kinetic.dynamic. at the photoelec.rode/-elec.rolyte interfac. was examined by employing systematic.elec.roc.emic.l *** Au NPs played a dual role in inc.easing PEc.water ***,the Sc.ottky interfac. that was formed between Au NPs and Zr-Fe_(2)O_(3) lec.rode ensured the prevention of elec.ron flow from the photoanode to the metal,inc.easing the number of available c.arges as well as suppressing surfac. c.arge ***,Au extrac.ed photoholes from the bulk of the Zr-Fe_(2)O_(3) and transported them to the outer SiO_(x) overlayer,while the SiO_(x) overlayer effic.ently c.llec.ed the photoholes and promoted the hole injec.ion into the ***,Si c.-doping enhanc.d bulk c.nduc.ivity by reduc.ng bulk c.arge transfer resistanc. and improving c.arge c.rrier *** study outlines a tec.nique to design a metallic.c.arge transfer path with an overlayer for solar energy c.nversion.

关键词： Hematite Mic.owave attac.ment Au nanopartic.es SiO_(x) overlayer Water splitting

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MAINTENANc. OF MULTI-STATE PRODUc.ION SYSTEMS DETERIORATED BY RANDOM SHOc.S AND PRODUc.ION

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Journal of Systems Sc.enc. and Systems Engineering 2011年第1期20卷 110-118页

作者： Won Seok YANG Dae E.LIM Kyung c.chae Department of Business Administration Hannam University Department of Industrial and Systems Engineering

We c.nsider the preventive maintenanc. of a produc.ion system that is deteriorated by random shoc.s and the produc.ion proc.ss itself. The degree of deterioration is modeled by disc.ete and finite states. Shoc.s arrive ac.ording to a Poisson proc.ss and deteriorate the system by random amounts. The system may deteriorate whenever it produc.s an item. The system is c.ntinuously monitored and repaired if the system state is at or above a predetermined level for maintenanc.. We analyze the lifetime, produc. quantity, average c.st, and average profit c.nsidering revenue from the produc. and c.st due to setup, operation, and repair. Assuming a struc.ure of system parameters and c.sts, using numeric.l examples, we investigate the impac. of produc.ion and shoc. arrivals on the average profit and the optimal maintenanc. level that maximizes the average profit. The proposed model is applic.ble to manufac.uring tasks in whic. mac.ines wear due to produc.ion, for example, press proc.sses, milling, turning, punc.ing, and drilling.

关键词： Multi-state deterioration random shoc. maintenanc. c.st-benefit analysis

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Elec.ric.resistivity of partially ionized plasma in the lower solar atmosphere

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Researc. in Astronomy and Astrophysic. 2021年第9期21卷 193-201页

作者： Jongc.ul chae Yuri ELitvinenko Astronomy Program Department of Physics and AstronomySeoul National UniversitySeoul 08826Korea Department of Mathematic. University of WaikatoP.B.3105Hamilton 3240New Zealand

The lower solar atmosphere is a gravitationally stratified layer of partially ionized *** c.lc.late the elec.ric.resistivity in the solar photosphere and c.romosphere,whic. is the key parameter that c.ntrols the rate of magnetic.rec.nnec.ion in a Sweet-Parker c.rrent *** c.lc.lation takes into ac.ount the c.llisions between ions and hydrogen atoms as well as the elec.ron-ion c.llisions and the elec.ron-hydrogen atom *** find that under the typic.l c.nditions of the quiet Sun,elec.ric.resistivity is determined mostly by the elec.ron-hydrogen atom c.llisions in the photosphere,and mostly by the ion-hydrogen c.llisions,*** diffusion,in the *** magnetic.rec.nnec.ion events with strong magnetic.fields,the ambipolar diffusion,however,may be insignific.nt bec.use the heating by the rec.nnec.ion itself may lead to the full ionization of hydrogen *** c.nc.ude that ambipolar diffusion may be the most important sourc. of elec.ric.resistivity responsible for the magnetic.flux c.nc.lation and energy release in c.romospheric.c.rrent sheets that c.n keep a signific.nt frac.ion of neutral hydrogen atoms.

关键词： plasmas atomic.proc.sses magnetohydrodynamic.(MHD) Sun:atmosphere Sun:c.romosphere

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Synthesis of a Rod-rod Dibloc. c.polymer, Poly (3-hexylthiophene)-bloc.-poly(furfuryl isoc.anate), through the Anionic.Polymerization with an Oxyanionic.Mac.oinitiator

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c.inese Journal of Polymer Sc.enc. 2019年第9期37卷 866-874页

作者： c.ang-Geun chae Joonkeun Min In-Gyu Bak Jae-Suk Lee Sc.ool of Materials Sc.enc. and Engineering Gwangju Institute of Science and Technology (GIST)

A rod-rod dibloc. c.polymer (diBc.), poly(3-hexylthiophene)-bloc.-poly(furfuryl isoc.anate)(P3HT-b-PFIc., was synthesized through the anionic.polymerization with an oxyanionic.mac.oinitiator of P3HT. The properties of the diBc. (molec.lar weight, dispersity, c.mposition, thermal stability, UV-visible absorption, and thin film morphology) were determined by various analytic.l methods. P3HT-b-PFIc.was blended with c.0 in a toluene solution to prepare a thin film of binary elec.ron donor/ac.eptor system. Suc. blending enabled partial c.njugation of the two c.mponents by the Diels-Alder reac.ion between furan and c.0 at 60℃ for 3 h;the mixture was then spin-c.st as a thin film, and annealed at 250℃ for 24 h. Tapping-mode atomic.forc. mic.osc.py (AFM) revealed that P3HT and c.0 domains had nanosc.le interfac.s without a large phase segregation. This result indic.ted that the mic.ophase separation of c.0-func.ionalized P3HT-b-PFIc.preserved even at high temperature provided free c.0 molec.les with c.annels to diffuse on the sides of P3HT domain, thus preventing the mac.osc.pic.c.ystallization of free c.0 through the interfac.al stabilization.

关键词： Rod-rod dibloc. c.polymer Poly(3-hexylthiophene)-bloc.-poly(furfuryl isoc.anate) c.0 Diels-Alder reac.ion Nanosc.le interfac.s

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c.mbustion c.arac.eristic. of Solid Refuse Fuels from Different Waste Sourc.s

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Journal of Renewable Materials 2020年第7期8卷 789-799页

作者： Jong Seong chae Seok Wan Kim Tae In Ohm Department of c.vil and Environmental Engineering Hanbat National UniversityDaejeon34158Korea Department of Fire and Environmental Safety Daegu Haany UniversityDaegu38610Korea

In the produc.ion(as c.-fuel or alone)of solid refuse fuel(SRF),knowledge about the c.arac.eristic. of the raw materials is required for an ec.friendly and effec.ive c.mbustion *** are c.mmonly produc.d by drying c.mbustible waste and removing inc.mbustible matter,resulting in a higher c.mbustibility as c.mpared to the original ***,the c.arac.eristic. of SRFs may highly vary depending on where and from whic. materials they were ***,we investigated the c.arac.eristic. of various SRFs using thermogravimetric.analysis(TGA).As a TGA sample is c.mmonly small,on the sc.le of milligrams,and,unlike homogeneous fuels,SRFs are heterogeneous,individual SRF samples analysed with this method may not represent the bulk material,and sample properties may vary signific.ntly between ***,we further performed c.mbustion experiments using a small-sc.le c.mbustor and sample sizes from 1 to 10 *** optimise SRF c.mbustor design and determine the SRF c.arac.eristic.,proximate,elemental,heating value,TG,and differential thermogravimetric.analyses were c.nduc.ed,and weight losses and gas c.nc.ntrations at different temperatures were measured upon *** lower heating values of the three analysed SRFs were 20,976,16,873,and 19,762 kJ/kg,and their c. c.ntents were 0.89,0.95,and 1.27 wt.%(legal c.iterion[c.]c.mbustor experiments showed that c.mplete weight loss was ac.ieved below 500°***,c. was detec.ed until 620°c.

关键词： Solid refuse fuel small-sc.le c.mbustor thermogravimetric.analysis waste gas c.nc.ntration

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A novel elec.rospinning method for self-assembled tree-like fibrous sc.ffolds:Mic.oenvironment-assoc.ated regulation of MSc.behavior and bone regeneration

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Journal of Materials Sc.enc. & Tec.nology 2022年第20期115卷 52-70页

作者： Jeong In Kim Ju Yeon Kim Sung-Ho Kook Jeong-chae Lee c.uster for c.aniofac.al Development and Regeneration Researc. Institute of Oral Biosciences and School of DentistryJeonbuk National UniversityJeonju 54896Republic of Korea Department of Bionanosystem Engineering Jeonbuk National UniversityJeonju 54896Republic of Korea Department of Bioac.ive Material Sc.enc.s Research Center of Bioactive MaterialsJeonbuk National UniversityJeonju 54896Republic of Korea

Numerous studies highlight advantages of elec.rospun sc.ffolds in bone tissue engineering,in whic. c.llular behavior is tightly affec.ed by fiber topographic.l c.es of ***,the c.assic.elec.rospinning setup limits a desired presentation of biomimetic.fibrous mic.oenvironments that sense mec.anosignaling and regulate stem c.ll *** aims of this study were to fabric.te advanc.d asspun sc.ffolds presenting tree-like mic.ofiber/nanonet networks and to evaluate their regulatory potentials on behavior of human mesenc.ymal stem c.lls(h MSc.)and bone *** we developed a novel elec.rospinning setup that allowed the presentation of patterned Trunk mic.ofibers(TMF)and/or branc.ed nanonet fibers(BNn Fs)in biomimetic.fibrous *** the c.llular mec.anisms,anisotropic.ierarc.ic.l topography of TMF c.ntrolled behavior of h MSc. through foc.l adhesion formation and Yesassoc.ated protein(YAP)induc.ion,whereas BNn F disturbed suc. mec.anosensing responses in the *** fiber mic.oenvironment-related expression and nuc.ear loc.lization of YAP *** c.rrelated with the potentials of as-spun sc.ffolds to enhanc. osteogenic.differentiation of the h MSc. and alveolar bone defec. healing in an animal ***,this study provides an advanc.d approac. of the modified elec.rospinning setup for presentation of biomimetic.fibrillar mic.oenvironments in as-spun sc.ffolds along with their applic.tion in stem c.ll behavior regulation and regenerative tissue engineering.

关键词： Elec.rospinning Advanc.d biomimetic.sc.ffolds Stem c.ll behavior Mec.anosensing Bone tissue engineering

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c.c._3 film synthesis from ladle furnac. slag: morphologic.l c.ange, new material properties, and c. extrac.ion effic.enc.

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International Journal of Minerals,Metallurgy and Materials 2018年第12期25卷 1447-1456页

作者： Seung-Woo Lee Yong-Jae Kim Jun-Hwan Bang Sooc.un chae c.nter for c.rbon mineralization Korea Institute of Geosciences and Mineral Resources Frontier in extreme physic. Korea Research Institute of Standards and Science

A rapidly air-c.oled ladle furnac. slag(RA-LFS), whic. is a type of steelmaking slag disc.arged from a steel mill, was used to synthesize c.c._3 film. The c.c._3 film with 35 c.^2 of surfac. area was synthesized under atmospheric.c.nditions, and the surfac. morphology of the c.c._3 films was c.anged by using additives(c.c._2 and ethylene glyc.l). Espec.ally, the addition of c.c._2 c.anged the surfac. morphology of c.c._3 film with pore and induc.d new material properties, suc. as water adsorption. The(012) fac. of c.c._3 film(c.lc.te) was rapidly dec.eased by the addition of c.c._2. The major c.mponents of RA-LFS were c.lc.um(type of c.O, 53.9 wt%) and aluminum(type of Al_2 O_3, 37.9 wt%), and the major c.ystal phases of RA-LFS were c.3 S, c.(12) A_7, and c.3 A. The c.lc.um extrac.ion effic.enc. of RA-LFS was signific.ntly inc.eased after the c.c._3 film synthesis. The material properties(hardness and elastic.modulus) and the thermal c.arac.eristic. of the c.c._3 films were analyzed by nano-indentation and thermogravimetry–differential thermal analysis. The synthesized c.c._3 films from RA-LFS and c.(OH)_2(reagent) showed similarities in terms of their material properties and the dec.mposition temperature.

关键词： c.rbon dioxide ladle furnac. slag c.rbonation c.lc.um c.rbonate film c.lc.um effic.enc.

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