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Neural Regeneration Research 2025年第1期20卷 195-196页

作者： hyun Sung department of Neurology Johns Hopkins University School of MedicineBaltimoreMDUSA Medical Research institute and Department of PharmacologyPusan National University School of MedicineYangsanRepublic of Korea

Neurons are highly polarized,morphologically asymmetric,and functionally compartmentalized cells that contain long axons extending from the cell *** this reason,their maintenance relies on spatiotemporal regulation of organelle distribution between the somatodend.itic and axonal *** some organelles,such as mitochond.ia and smooth endoplasmic reticulum,are widely distributed throughout the neuron,others are segregated to either the somatodend.itic or axonal *** example,Golgi outposts and acidified lysosomes are predominantly present in the somatodend.itic domain and rarely distributed along the axon,whereas newly formed autophagosomes and synaptic vesicles are mainly distributed.in the distal axon(Britt et al.,2016).

关键词： organelle regulation distribution

Brain age estimation:premise,promise,and problems

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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 world.ide 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

invariant Metrics and Laplacians on Siegel-Jacobi disk

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Chinese Annals of Mathematics,Series B 2010年第1期31卷 85-100页

作者： Jae-hyun yang department of Mathematics Inha University Incheon 402-751 Republic of Korea

Let d n be the generalized unit disk of degree *** this paper,Riemannian metrics on the Siegel-Jacobi disk d n × C (m,n) which are invariant under the natural action of the Jacobi group are found explicitly and the L... 详细信息

关键词： invariant metrics Siegel-Jacobi disk Partial Cayley transform

Kinematical system of breadth cam profile design

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Journal of Central South University 2011年第2期18卷 451-457页

作者： SHiN Joong-ho 李琳 yang hyun-d.i KWON Soon-man department of Mechanical design & Manufacturing Changwon National University

The design solutions for breadth cam mechanism was presented. The main topics of the shape design for breadth cam was to calculate the coordinate at each contact point to determine the cam profile. The proposed method according to velocity and geometric relationships of instant velocity centers can easily determine each contact point at any instant moment. The cam profile was defined by contouring of the contact points. And also a program was developed by using Microsoft Visual C++ program,which can quickly and easily draw a 2d cam profile through the displacement diagram. Finally,the program was used to confirm the accuracy on the breadth cam profile design by computer animation graphically.

关键词： cam profile breadth cam reciprocating follower oscillating follower instant velocity center

Carbon-Coated Three-dimensional MXene/iron Selenide Ball with Core–Shell Structure for High-Performance Potassium-ion Batteries

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Nano-Micro Letters 2022年第1期14卷 278-294页

作者： Su hyun yang Yun Jae Lee Heemin Kang Seung-Keun Park Yun Chan Kang department of Materials Science and Engineering Korea UniversityAnam-DongSeongbuk-GuSeoul 136-713Republic of Korea department of Advanced Materials Engineering Chung-Ang University4726 Seodong-daeroDaedeok-myeonAnseong-siGyeonggi-do 17546Republic of Korea

Two-dimensional(2d)MXenes are promising as electrode materials for energy storage,owing to their high electronic conductivity and low diffusion ***,similar to most 2d materials,MXene nanosheets easily restack during the electrode preparation,which degrades the electrochemical performance of MXene-based materials.A novel synthetic strategy is proposed for converting MXene into restacking-inhibited three-dimensional(3d)balls coated with iron selenides and *** strategy involves the preparation of Fe_(2)O_(3)@carbon/MXene microspheres via a facile ultrasonic spray pyrolysis and subsequent selenization *** 3d structuring effectively prevents interlayer restacking,increases the surface area,and accelerates ion transport,while maintaining the attractive properties of ***,combining iron selenides and carbon with 3d MXene balls offers many more sites for ion storage and enhances the structural robustness of the composite *** resultant 3d structured microspheres exhibit a high reversible capacity of 410 mAh g^(−1) after 200 cycles at 0.1 A g^(−1) in potassium-ion batteries,corresponding to the capacity retention of 97% as calculated based on 100 *** at a high current density of 5.0 A g^(−1),the composite exhibits a discharge capacity of 169 mAh g^(−1).

关键词： MXene Spray pyrolysis iron selenide Potassium-ion batteries 3d structures

Reciprocal inhibition of expression between RAV1 and BES1 modulates plant growth and development in Arabidopsis

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Journal of integrative Plant Biology 2023年第5期65卷 1226-1240页

作者： dami yang hyun-young Shin hyun Kyung Kang Yun Shang So Young Park dong-Hoon Jeong Kyoung Hee Nam department of Biological Sciences Sookmyung Women's UniversitySeoul 04310Republic of Korea Research Institute for Women's HealthSookmyung Women's UniversitySeoul 04310Republic of Korea department of Life Science and Multidisciplinary Genome institute Hallym UniversityChuncheon 24252Republic of Korea Present Address:Peking University Institute of Advanced Agricultural ScienceWeifang 261325China

RAV1(Related to ABi3/VP1)is a plant-specific B3 and AP2 domain-containing transcription factor that acts as a negative regulator of growth in many plant *** expression of RAV1 is downregulated by brassinosteroids(BRs);large-scale transcriptome analyses have shown that the expression of RAV1 was previously targeted by BRi1-EMS-SUPPRESOR1(BES1)and BRASSiNAZOLE-RESiSTANT1(BZR1),which are critical transcription factors for the BR-signaling *** RAV1-overexpressing transgenic plants,we showed that RAV1 overexpression reduced the BR signaling capacity,resulting in the downregulation of BR biosynthetic genes and BES1 ***,we demonstrated that BES1,not BZR1,is directly bound to the RAV1 promoter and repressed RAV1 expression,and vice versa;RAV1 is also bound to the BES1 promoter and repressed BES1 *** mutual inhibition was specific to RAV1 and BES1 because RAV1 exhibited binding activity to the BZR1 promoter but did not repress BZR1 *** observed that constitutively activated BR signaling phenotypes in bes1-d were attenuated by the repression of endogenous BES1 expression in transgenic bes1-d plants overexpressing ***-sequencing analysis of RAV1-overexpressing transgenic plants and bes1-d mutant plants revealed differentially expressed genes by RAV1 and BES1 and genes that were oppositely co-regulated by RAV1 and ***1 and BES1 regulated different transcriptomes but co-regulated a specific set of genes responsible for the balance between growth and *** results suggested that the mutual inhibitory transcriptional activities of RAV1 and BES1 provide fine regulatory mechanisms for plant growth and development.

关键词： BES1 growth modulation RAV1 transcriptional regulation

Simultaneous enhancement in electrical conductivity and Seebeck coefficient by single-to double-valley transition in a dirac-like band

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npj Computational Materials 2022年第1期8卷 2239-2246页

作者： Yu d.i Wenjiang Zhou hyun-Jung Kim Qichen Song Xin Qian Te-Huan Liu Ronggui yang School of Energy and Power Engineering Huazhong University of Science and TechnologyWuhanHubei430074China Peter Grünberg institut and.institute for Advanced Simulation Forschungszentrum Jülich and JARAD-52425JülichGermany department of Chemistry and Chemical Biology Harvard UniversityCambridgeMA02138USA

SnTe possesses a single-to double-valley transition in the conduction band minimum when a compressive strain is *** a tight-binding analysis,it is shown that the variation of the band structure is attributed to the strain-induced delocalization of both the Sn-5s orbitals and Te-5p orbitals with different angular *** effect can largely increase the electron density of states near the band edge and thus keep the Fermi level of the compressed SnTe closer to it,where the electrons have lower scattering *** strain-induced double valleys lead to simultaneous increases in the electrical conductivity and the Seebeck coefficient and thereby nearly four times the enhancement of the power factor at the doping concentration of 5×10^(19) cm^(–3).This work suggests a feasible concept that can be employed to promote the power factor of a dirac semiconductor via manipulating the valley degeneracy in the conduction band minimum.

关键词： conductivity double coefficient

Non-Hermitian chiral degeneracy of gated graphene metasurfaces

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Light(Science & Applications) 2023年第5期12卷 766-775页

作者： Soojeong Baek Sang hyun Park donghak Oh Kanghee Lee Sangha Lee Hosub Lim Taewoo Ha hyun Sung Park Shuang Zhang Lan yang Bumki Min Teun-Teun Kim department of Mechanical Engineering Korea Advanced Institute of Science and Technology(KAIST)Daehak-ro 291Daejeon 34141Republic of Korea department of Electrical and Computer Engineering University of Minnesota200 Union street SEMinneapolisMN 55455USA Harvard.institute of Medicine Harvard Medical SchoolHarvard UniversityBrigham and Women's Hospital25 Shattuck StreetBostonMA 02215USA Center for integrated Nanostructure Physics Institute for Basic Science(IBS)Sungkyunkwan UniversitySeobu-ro 2066Suwon 16419Republic of Korea Samsung Advanced.institute of Technology Samsung ElectronicsSamsung-roSuwon 16678Republic of Korea department of Physics The University of Hong KongPokfulam RoadHong Kong Special Administrative RegionChina department of Electrical and Systems Engineering Washington University1 Brookings DriveSaint LouisMO 63130USA department of Physics Korea Advanced Institute of Science and Technology(KAIST)Daehak-ro 291Daejeon 34141Republic of Korea department of Physics University of UlsanDaehakroUlsan 44610Republic of Korea Korea Research institute of Standards and Science(KRiSS) Gajeong-ro 267Daejeon 34113Republic of Korea

Non-Hermitian degeneracies,also known as exceptional points(EPs),have been the focus of much attention due to their singular eigenvalue surface ***,as pertaining to a non-Hermitian metasurface platform,the reduction of an eigenspace dimensionality at the EP has been investigated mostly in a passive repetitive ***,we propose an electrical and spectral way of resolving chiral EPs and clarifying the consequences of chiral mode collapsing of a non-Hermitian gated graphene *** specifically,the measured non-Hermitian Jones matrix in parameter space enables the quantification of nonorthogonality of polarisation eigenstates and half-integer topological charges associated with a chiral ***,the output polarisation state can be made orthogonal to the coalesced polarisation eigenstate of the metasurface,revealing the missing dimension at the chiral *** ad.ition,the maximal nonorthogonality at the chiral EP leads to a blocking of one of the cross-polarised transmission pathways and,consequently,the observation of enhanced asymmetric polarisation *** anticipate that electrically controllable non-Hermitian metasurface platforms can serve as an interesting framework for the investigation of rich non-Hermitian polarisation dynamics around chiral EPs.

关键词： structure chiral integer

Asymmetric dynamic behaviors of magnetic domain wall in trapezoid-cross-section nanostrip

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Chinese Physics B 2020年第9期29卷 518-522页

作者： Xiao-Ping Ma Hong-Guang Piao Lei yang dong-hyun Kim Chun-Yeol You Liqing Pan Research institute for Magnetoelectric&Weak Magnetic-field detection College of ScienceChina Three Gorges UniversityYichang 443002China department of Physics Chungbuk National UniversityCheongju 28644ChungbukRepublic of Korea department of Emerging Materials Science Daegu Gyeongbuk Institute of Science and Technology(DGIST)Daegu 42988Republic of Korea

Field-d.iven magnetic domain wall propagation in ferromagnetic nanostrips with trapezoidal cross section has been systematically investigated by means of micromagnetic simulation. Asymmetric dynamic behaviors of domain wall, depending on the propagation direction, were observed under an external magnetic field. When the domain walls propagate in the opposite direction along the long axis of the nanostrip, the Walker breakdown fields as well as the average velocities are different. The asymmetric landscape of demagnetization energies, which arises from the trapezoidal geometry, is the main origin of the asymmetric propagation behavior. Furthermore, a trapezoid-cross-section nanostrip will become a nanotube if it is rolled artificially along its long axis, and thus a two-dimensional transverse domain wall will become a three-dimensional one. interestingly, it is found that the asymmetric behaviors observed.in two-dimensional nanostrips with trapezoidal cross section are similar with some dynamic properties occurring in three-dimensional nanotubes.

关键词： ferromagnetic nanowire magnetic domain wall geometric effect asymmetric Walker breakdown

An effective method to reduce residual lithium compounds on Ni-rich Li[Ni0.6Co0.2Mn0.2]O2 active material using a phosphoric acid derived Li3PO4 nanolayer

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Nano Research 2015年第5期8卷 1464-1479页

作者： Chang-Heum Jo dae-hyun Cho hyung-Joo Noh Hithshi Yashiro yang-Kook Sun Seung Taek Myung department of Nano Engineering Sejong University 98 Gunja-dong Gwangjin-gu Seou1143-747 Republic of Korea department of Chemical Engineering Iwate University Morioka Iwate 020-8551 Japan department of Energy Engineering Hanyang University Seongdong-gu Seou1133-791 Republic of Korea

The Ni-rich Li[Ni0.6Co0.2Mn0.2]O2 surface has been modified with H3PO4. After coating at 80 ℃, the products were heated further at a moderate temperature of 500 ℃ in air, when the added H3PO4 transformed to Li3PO4 after reacting with residual LiOH and Li2CO3 on the surface. A thin and uniform smooth nanolayer （〈 10 nm） was observed on the surface of Li[Ni0.6Co0.2Mn0.2]O2 as confirmed by transmission electron microscopy （TEM）. Time-of-flight secondary ion mass spectroscopic （ToF-SiMS） data exhibit the presence of LiP＋, LiPO-, and Li2PO2＋ fragments, indicating the formation of the Li3PO4 coating layer on the surface of the Li[Ni0.6Co0.2Mn0.2]O2. As a result, the amounts of residual lithium compounds, such as LiOH and Li2CO3, are significantly reduced. As a consequence, the LigPO4-coated Li[Ni0.6Co0.2Mn0.2]O2 exhibits noticeable improvement in capacity retention and rate capability due to the reduction of residual LiOH and Li2CO3. Further investigation of the extensively cycled electrodes by X-ray diffraction （XRd）, TEM, and ToF-SiMS demonstrated that the LiBPO4 coating layers have multi-functions： Absorption of water in the electrolyte that lowers the HF level, HF scavenging, and protection of the active materials from deleterious side reactions with the electrolyte during extensive cycling, enabling high capacity retention over 1,000 cycles.

关键词： Li3PO4 coating positive electrode lithium batteries