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Friction 2021年第5期9卷 1292-1302页

作者： young-Jun jang Jae-Il KIM Wooyoung LEE Jongkuk KIM Department of Extreme Environmental Coatings Surface Technology DivisionKorea Institute of Materials Science(KIMS)Gyeongnam-do 51508Republic of Korea Department of Mechanical Science and Engineering Graduate School of EngineeringNagoya UniversityNagoya 464-8603Japan

Tetrahedral amorphous carbon(ta‐C)has emerged as an excellent coating material for improving the reliability of application components under high normal ***,we present the results of our investigations regarding the mechanical and tribological properties of a 2‐μm‐thick multilayer ta‐C coating on high‐speed steel *** composed of alternating soft and hard layers are fabricated using filtered a cathodic vacuum arc with alternating substrate bias voltages(0 and 100 V or 0 and 150 V).The thickness ratio is discovered to be 1:3 for the sp2‐rich and sp3‐rich *** results show that the hardness and elastic modulus of the multilayer ta‐C coatings increase with the sp3 content of the hard *** hardness reached approximately 37 GPa,whereas an improved toughness and a higher adhesion strength(>29 N)are *** friction performance(μ=0.07)of the multilayer coating is similar to that of the single layer ta‐C thick coating,but the wear rate(0.13×10^(–6) mm^(3)/(N∙m))improved under a high load of 30 *** further demonstrate the importance of the multilayer structure in suppressing crack propagation and increasing the resistance to plastic deformation(H3/E2)ratio.

关键词： tetrahedral amorphous carbon(ta‐C) filtered cathodic vacuum arc deposition multilayer coatings alternating substrate bias voltage wear resistance plastic deformation resistance

Development of genome engineering technologies in cattle: from random to specific

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Journal of Animal Science and Biotechnology 2018年第2期9卷 285-293页

作者： Soo-young Yum Ki-young Youn Woo-Jae Choi Goo jang Department of Veterinary Clinical Science College of Veterinary Medicine and the Research Institute of Veterinary Science Seoul National University Farm Animal Clinical Training and Research Center Institute of Green Bio Science Technology Seoul National University Emergence Center for Food-Medicine Personalized Therapy System Advanced Institutes of Convergence Technology Seoul National University College of Veterinary Medicine Seoul National University

The production of transgenic farm animals(e.g., cattle) via genome engineering for the gain or loss of gene functions is an important undertaking. In the initial stages of genome engineering, DNA micro-injection into one-cell stage embryos(zygotes) followed by embryo transfer into a recipient was performed because of the ease of the ***, as this approach resulted in severe mosaicism and has a low efficiency, it is not typically employed in the cattle as priority, unlike in mice. To overcome the above issue with micro-injection in cattle, somatic cell nuclear transfer(SCNT) was introduced and successfully used to produce cloned livestock. The application of SCNT for the production of transgenic livestock represents a significant advancement, but its development speed is relatively slow because of abnormal reprogramming and low gene targeting efficiency. Recent genome editing technologies(e.g.,ZFN, TALEN, and CRISPR-Cas9) have been rapidly adapted for applications in cattle and great results have been achieved in several fields such as disease models and bioreactors. In the future, genome engineering technologies wil accelerate our understanding of genetic traits in bovine and wil be readily adapted for bio-medical applications in cattle.

关键词： Cattle CRISPR-Cas9 Genome engineering technologies Transgenesis Transposon

An Anionic Covalent Organic Framework as an Electrostatic Molecular Rectifier for Stabilizing Mg Metal Electrodes

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CCS Chemistry 2023年第11期5卷 2567-2575页

作者： Zhongping Li Hyunseok Moon seok-Kyu Cho Changqing Li Jeong-Min seo Jong-Beom Baek Hong Xu Sang-young Lee Department of Chemical and Biomolecular Engineering Yonsei UniversitySeoul 03772 School of Energy and Chemical Engineering Ulsan National Institute of Science and TechnologyUlsan 44919 UBATT Inc. Daejeon 34036 Institute of Nuclear and New Energy Technology Tsinghua UniversityBeijing 100084

Despite its potential as a high-capacity battery electrode,magnesium(Mg)metals are highly susceptible to electrolytes,resulting in the formation of unwanted passivation layers,which hinder charge transfer ***,we first report an anionic covalent organic framework(a-COF)as an electrostatic molecular rectifier(that can preferentially trap solvent molecules)to stabilize Mg metal *** to a neutral COF(n-COF)as a control sample,the a-COF enhances Mg^(2+)transport by facilitating the desolvation of Mg^(2+)-solvent complexes and cationic mobility through its negatively charged one-dimensional columns,thereby achieving an ionic conductivity eight times higher than that of the *** addition,the anionic porous frameworks in contact with Mg metal electrodes enable a uniform Mg^(2+)flux and interfacial stability with Mg metal ***,the a-COF exhibited reversible Mg plating/stripping cyclability on Mg metal electrodes compared to the n-COF,demonstrating the electrochemical viability of the anionic frameworks for Mg metal electrode stabilization.

关键词： anionic covalent organic framework Mg metal electrodes ion transport interfacial stability Mg plating/stripping

Some remarks on one-sided regularity

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Frontiers of Mathematics in China 2018年第4期13卷 833-847页

作者： Tai Keun KWAK Yang LEE young Joo seo Department of Mathematics Daejin University Pocheon 11159 Korea Institute of Basic Science Daejin University Pocheon 11159 Korea Department of Mathematics Hanyang University Seoul 04763 Korea

A ring is said to be right （resp., left） regular-duo if every right （resp., left） regular element is regular. The structure of one-sided regular elements is studied in various kinds of rings, especially, upper triangular matrix rings over one-sided Ore domains. We study the structure of （one-sided） regular-duo rings, and the relations between one-sided regular-duo rings and related ring theoretic properties.

关键词： right (left) regular element right (left) regular-duo ring uppertriangular matrix ring right (left) Ore domain

Plasmid DNA-loaded asymmetrically porous membrane for guided bone regeneration

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Journal of Materials Science & Technology 2021年第4期63卷 161-171页

作者： Se Heang Oh June-Ho Byun So young Chun young-Joo jang Jin Ho Lee Department of Nanobiomedical Science Dankook UniversityCheonan 31116Republic of Korea Department of Oral and Maxillofacial Surgery Gyeongsang National University School of MedicineGyeongsang National University HospitalInstitute of Health SciencesGyeongsang National UniversityJinju 52727Republic of Korea BioMedical Research Institute Kyungpook National University HospitalDaegu 41404Republic of Korea Department of Advanced Materials Hannam UniversityDaejeon 34054Republic of Korea

Although bone defects can be restored spontaneously,bone reconstruction with sufficient strength and volume continues to be a challenge in clinical *** recent years,the use of a variety of biomaterials with bioactivity has been attempted to compensate for this ***,we fabricated a pDNA(encoding for BMP-2)-loaded asymmetrically porous polycaprolactone(PCL)/Pluronic F127 membrane as a bioactive guided bone regeneration(GBR)membrane,using a modified immersion-precipitation *** was observed that the GBR membrane allows continuous release of pDNA for more than20 *** pDNA was sufficiently transfected into human bone marrow stem cells(h BMSCs)without significant cytotoxicity and the gene-transfected cells showed prolonged synthesis of *** in vitro osteogenic differentiation and in vivo animal studies,the effective induction of osteogenic differentiation of h BMSCs and enhanced bone regeneration by the pDNA-loaded asymmetrically porous PCL/Pluronic F127 membrane was observed,suggesting that the pDNA-loaded membrane as a bioactive GBR membrane can be an alternative therapeutic technique for effective bone regeneration.

关键词： loaded porous attempted

Fake News Detection on Social Media: A Temporal-Based Approach

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Computers, Materials & Continua 2021年第12期69卷 3563-3579页

作者： Yonghun jang Chang-Hyeon Park Dong-Gun Lee Yeong-seok seo Department of Computer Engineering Yeungnam UniversityGyeongsan38541Korea

Following the development of communication techniques and smart devices,the era of Artificial Intelligence(AI)and big data has *** increased connectivity,referred to as hyper-connectivity,has led to the development of smart *** in these smart cities can access numerous online contents and are always *** developments,however,also lead to a lack of standardization and consistency in the propagation of information throughout communities due to the consumption of information through social media *** cannot often be verified,which can confuse the *** increasing influence of social media has thus led to the emergence and increasing prevalence of fake *** this study,we propose a methodology to classify and identify fake news emanating from social *** collected content from Twitter to detect fake news and statistically verified that the temporal propagation pattern of quote retweets is effective for the classification of fake *** verify this,we trained the temporal propagation pattern to a two-phases deep learning model based on convolutional neural networks and long short-term *** fake news classifier demonstrates the ability for its early ***,it was verified that the temporal propagation pattern was the most influential feature compared to other feature groups discussed in this paper.

关键词： Artificial intelligence deep learning fake news rumor smart city data analysis

Spatial analysis of various multiplex cinema types

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Frontiers of Architectural Research 2016年第1期5卷 63-73页

作者： young-seo Park Sungil Ham Samoo Architects & Engineers Seoul 138-240 Republic of Korea School of Mechatronics Gwangju Institute of Science and Technology Gwangju 610005

This study identifies the spatial charactenstics and relationships of each used space according to the multiplex type. In this study, multiplexes are classified according to screen rooms and circulation systems, and each used space is quantitatively analyzed. The multiplex type based on screen rooms and moving line systems influences the relationship and characteristics of each used space in various ways. In particular, the structure of the used space of multiplexes has a significant effect on orofit generation and audience convenience.

关键词： Multiplex Space anatysis Area share Integration Isovist

Expression of a High Mobility Group Protein Isolated from Cucumis sativus Affects the Germination of Arabidopsis thaliana under Abiotic Stress Conditions

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Journal of Integrative Plant Biology 2008年第5期50卷 593-600页

作者： Ji young jang Kyung Jin Kwak Hunseung Kang Department of Plant Biotechnology Agricultural Plant Stress Research Center and Biotechnology Research InstituteCollege of Agriculture and Life SciencesChonnam National UniversityGwangju 500-757Korea

Although high mobility group B （HMGB） proteins have been identified from a variety of plant species, their importance and functional roles in plant responses to changing environmental conditions are largely unknown. Here, we investigated the functional roles of a CsHMGB isolated from cucumber （Cucumis sativus L.） in plant responses to environmental stimuli. Under normal growth conditions or when subjected to cold stress, no differences in plant growth were found between the wild-type and transgenic Arabidopsis thaliana overexpressing CsHMGB. By contrast, the transgenic Arabidopsis plants displayed retarded germination compared with the wild-type plants when grown under high salt or dehydration stress conditions. Germination of the transgenic plants was delayed by the addition of abscisic acid （ABA）, implying that CsHMGB affects germination through an ABA-dependent way. The expression of CsHMGB had affected only the germination stage, and CsHMGB did not affect the seedling growth of the transgenic plants under the stress conditions. The transcript levels of several germination-responsive genes were modulated by the expression of CsHMGB in Arabidopsis. Taken together, these results suggest that ectopic expression of a CsHMGB in Arabidopsis modulates the expression of several germinationresponsive genes, and thereby affects the germination of Arabidopsis plants under different stress conditions.

关键词： abiotic stress cucumber Cucumis sativus high mobility group protein transgenic Arabidopsis plant.

Mechanical and electrochemical characteristics evaluation in annealing treatment for ship material

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中国有色金属学会会刊：英文版 2009年第B9期19卷 40-44页

作者： seok-Ki jang young-Jae JEONG seong-Jong KIM Division of Marine Engineering Mokpo Maritime University Jeonnam Techno Park

The effect of heat treatment on the electrochemical and mechanical properties of SS400 steel was investigated, and the effects of annealing conditions on notched specimens subjected to the slow strain rate test (SSRT) were studied. The results show that no correlations are observed among the maximum tensile strength, yield strength, and stress corrosion cracking. In contrast, the elongation and time-to-fracture are improved with stress-relieving annealing compared with the as-received condition. The elongation, time-to-fracture, and number of dimples increase with annealing heat treatment.

关键词：退火处理电化学船舶材料特性评价机械 SS400钢应力腐蚀开裂消除应力退火

Properties of ZnO Thin Films Grown on Si (100) Substrates by Pulsed Laser Deposition

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Journal of Materials Science & Technology 2010年第11期26卷 973-976页

作者： young Rae jang Keon-Ho Yoo Seung Min Park Department of Physics Kyung Hee University Department of Chemistry Kyung Hee University

ZnO thin films were grown on Si （100） substrates by pulsed laser deposition using a ZnO *** substrate temperature was varied in the range of room temperature to 800 ℃,and the oxygen partial pressure of 0.1333 Pa （1 m Torr） to 1333 Pa （10 Torr）.The properties of the resulting films were investigated by photoluminescence （PL）,grazing incidence X-ray diffraction （GIXRD）,X-ray photoelectron spectroscopy （XPS）,and field emission scanning electron microscopy （FESEM）.Based on the ultraviolet （UV,～380 nm） to visible emission ratio in the PL spectrum,the optimum growth conditions were determined to be 600 ℃ and 133.3 Pa （1 Torr）,*** oxygen 1s peak in the XPS spectrum was decomposed into two *** peak at lower binding energy increased in intensity with the oxygen partial pressure from 0.1333 Pa （1 m Torr） to 133.3 Pa （1 Torr） while the other peak *** GIXRD curve at the optimum condition showed strong two peaks （002） and （103）.A strong correlation between the （103） peak intensity and the UV emission intensity was found.

关键词： ZnO Pulsed laser deposition Photoluminescence