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Numerical modelling of a low power non-transferred arc plasma reactor for methane conversion

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Plasma Science and technology 2019年第6期21卷 29-37页

作者： B I MIN D k DINH D H LEE t H kim S CHOI Institute for Nuclear Science and technology Jeju National University 102 Jejudaehak-ro Jeju 63243Republic of Korea University of Science and technology(USt) 217 Gajeong-ro Yuseong-gu Daejeon 34113 Republic of Korea korea Institute of Machinery and Materials 156 Gajeongbuk-ro Yuseong-gu Daejeon 34103 Republic of Korea Department of Nuclear and Energy Engineering Jeju National University 102 Jejudaehak-ro Jeju 63243Republic of Korea

thermal flow characteristics and the methane conversion reaction in a low power arc plasma reactor for efficient storage and transport of methane,which is the main component of shale gas,were *** temperature and velocity distributions were calculated according to the type of discharge gases and arc current level by a self-developed magnetohydrodynamics (MHD)code and a commercial ANSYS-FLUENt code;the transport of chemical species was analyzed as including the chemical reactions of methane *** simulated results were verified by the comparison of calculated and measured arc voltages with permissible low error as under 4%.three C2 hydrocarbon gases with ethane (C2H6),ethylene (C2H4),and acetylene (C2H2)were selected as the converted species of methane from experimental *** mass fraction of C2 hydrocarbons and hydrogen as the product of the conversion reaction at the reactor was also *** values show good agreement with the actual experimental results in that the major conversion reaction occurred in C2H2 and hydrogen,and the conversions to C2H6,C2H4,and hydrogen were minor reactions of methane pyrolysis conversion.

关键词： numerical modelling non-transferred arc plasma methane chemical reaction

Vickers and knoop Micro-hardness Behavior of Coarse-and Ultrafine-grained titanium

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Journal of Materials Science & technology 2010年第10期26卷 904-907页

作者： k.P.Sanosh A.Balakrishnan L.Francis t.N.kim Department of Information and Electronic Materials Engineering College of EngineeringPaichai University Laboratoire SIMAP GPM2 Grenoble-INPUJFCNRS 101 Rue de la PhysiqueBP46 38402 Saint Martin d'He' res CedexFrance University of Genova Department of Chemistry and Industrial Chemistry

the present study focuses on the relationship of hardness with grain size for commercially pure titanium （Cpti） and ultra fine grained titanium （UFG-ti） produced by equal channel angular process （ECAP） of Cp-ti）.Vickers and knoop indentations of UFG-ti at different loads was ～2.5 times harder than those of *** diffraction （XRD） analysis showed peak broadening in UFG-ti due to reduced grain size and micro-lattice *** electron microscopy （SEM） revealed that ECAP had reduced the grain size of Cp-ti by ～10 *** statistics showed UFG-ti with lower dispersion in hardness values compare to Cp-ti indicating a more uniform microstructure.

关键词： Vickers knoop Hardness Ultrafine-grained titanium

SARS-CoV-2 RBD and Its Variants Can Induce Platelet Activation and Clearance:Implications for Antibody therapy and Vaccinations against COVID-19

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Research 2024年第3期2023卷 1-15页

作者： Xiaoying Ma Jady Liang Guangheng Zhu Preeti Bhoria Aron A.Shoara Daniel t.Mackeigan Christopher J.khoury Sladjana Slavkovicl Lisha Lin Danielle karakas Ziyan Chen Viktor Prifti Zhenze Liu Chuanbin Shen Yuchong Li Cheng Zhang Jiayu Dou Zack Rousseau Jiamin Zhang tiffany Ni Xi Lei Pingguo Chen Xiaoyu Wu Hamed Shaykhalishahi Samira Mubareka kim AConnelly Haibo Zhang Ori Rotstein Heyu Ni Department of Laboratory Medicine and Pathobiology University of TorontoTorontoONCanada Department of Laboratory Medicine Keenan Research Centre for Biomedical Science of St.Michael’s HospitalTorontoONCanada toronto Platelet Immunobiology Group TorontoONCanada Department of Physiology University of TorontoTorontoONCanada CCOA therapeutics Inc. TorontoONCanada Canadian Blood Services Centre for Innovation TorontoONCanada the State key Laboratory of Respiratory Disease Guangzhou Institute of Respiratory DiseaseThe First Affiliated Hospital of Guangzhou Medical UniversityGuangzhouGuangdongChina Department of Laboratory Medicine The Second Affliated Hospital of Guangzhou University of Chinese MedicineGuangzhouChina Advanced Pharmaceutics&Drug Delivery Laboratory Leslie Dan Faculty of PharmacyUniversity of TorontoTorontoONCanada Department of Medical Microbiology and Infectious Disease Sunnybrook Health Science CentreToronto ONCanada Department of Medicine University of TorontoTorontoONCanada Division of Cardiology.St.Michael's Hospital TorontoONCanada Department of Anesthesiology and Pain Medicine and Division of Critical Care Medicine University of TorontoTorontoONCanada interdepartmental Division of Critical Care Medicine University of TorontoTorontoONCanada Department of Surgery University of Toronto TorontoONCanada.

the COVID-19 pandemic caused by SARS-CoV-2 virus is an ongoing global health *** cases of COVID-19 and the rare cases of COVID-19 vaccine-induced-thrombotic-thrombocytopenia(VItt)are both associated with thrombosis and thrombocytopenia;however,the underlying mechanisms remain inadequately *** infection and vaccination utilize the spike protein receptor-binding domain(RBD)of *** found that intravenous injection of recombinant RBD caused significant platelet clearance in *** investigation revealed the RBD could bind platelets,cause platelet activation,and potentiate platelet aggregation,which was exacerbated in the Delta and kappa *** RBD–platelet interaction was partially dependent on theβ3 integrin as binding was significantly reduced inβ3−/−***,RBD binding to human and mouse platelets was significantly reduced with relatedαIIbβ3 antagonists and mutation of the RGD(arginine-glycine-aspartate)integrin binding motif to RGE(arginine-glycine-glutamate).We developed anti-RBD polyclonal and several monoclonal antibodies(mAbs)and identified 4F2 and 4H12 for their potent dual inhibition of RBD-induced platelet activation,aggregation,and clearance in vivo,and SARS-CoV-2 infection and replication in Vero E6 *** data show that the RBD can bind platelets partially thoughαIIbβ3 and induce platelet activation and clearance,which may contribute to thrombosis and thrombocytopenia observed in COVID-19 and *** newly developed mAbs 4F2 and 4H12 have potential not only for diagnosis of SARS-CoV-2 virus antigen but also importantly for therapy against COVID-19.

关键词： Antibody diagnosis vaccine

thermodynamic description of the ternary compounds in the Cu-In-Se system

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Rare Metals 2006年第5期25卷 481-487页

作者： SHEN Jianyun W.k. kim SHANG Shunli CHU Maoyou CAO Song t.J. Anderson Department of Chemical Engineering University of Florida Gainesville FL 32611 USA General Research Institute for Non-ferrous Metals of Beijing 100088 Beijing China

A set of thermodynamic descriptions of the temary compounds （mainly α-CulnSe2, δ-CulnSe2, Culn3Se5 and CulnsSe8） in the Cu-In-Se system was established by adopting sub-lattice model. the model parameters are carefully evaluated by integrating the experimental data of thermodynamic properties, phase equilibrium and theoretical calculation of formation energies of different point defects. the evaluated Gibbs energies of the compounds reasonably agree with that estimated from EMF experiment and ab initio calculation. the calculated phase relationships in the Cu-In-Se system are in accord with the experimental phase diagrams. the obtained standard enthalpy of formation of CulnSe2 is close to that reported in the literatures.

关键词： Cu-In-Se system thermodynamics Gibbs energy defect compound

Design of small-area multi-bit antifuse-type 1 kbit OtP memory

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Journal of Central South University 2009年第3期16卷 467-473页

作者：李龙镇 LEE J H kim t H JIN k H PARk M H HA P B kim Y H Department of Electronic Engineering Changwon National University Department of Computer Science and technology Yanbian University

A multi-bit antifuse-type one-time programmable （OtP） memory is designed, which has a smaller area and a shorter programming time compared with the conventional single-bit antifuse-type OtP memory. While the conventional antifuse-type OtP memory can store a bit per cell, a proposed OtP memory can store two consecutive bits per cell through a data compression technique. the 1 kbit OtP memory designed with Magnachip 0.18 μm CMOS （complementary metal-oxide semiconductor） process is 34% smaller than the conventional single-bit antifuse-type OtP memory since the sizes of cell array and row decoder are reduced. And the programming time of the proposed OtP memory is nearly 50% smaller than that of the conventional counterpart since two consecutive bytes can be compressed and programmed into eight OtP cells at once. the layout area is 214 μm× 327 μ,, and the read current is simulated to be 30.4 μA.

关键词： multi-bit OtP programming time antifuse memory data compression

Photoluminescence enhancement of red-emitting GdVO_4:Eu and YVO_4:Eu phosphors by adding zinc

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Journal of Rare Earths 2013年第1期31卷 13-17页

作者： k.Park J.kim k.Y.kim J.Y.kim Y.kim S.J.Dhoble Faculty of Nanotechnology and Advanced Materials Engineering Sejong University Department of Advanced Materials Engineering Hoseo University Department of Chemistry and Institute of Basic Sciences Dankook University Department of Physics R.T.M. Nagpur University

We synthesized the rare-earth activated Ro.94_xEuo.06ZnxVO4 （R： Gd and Y; 0〈_x〈_0.08） phosphors with a spherical mor- phology and a smooth surface by the ultrasonic spray pyrolysis. the annealed Ro.94_xEuo.06ZnxVO4 crystallized in the tetragonal zircon type structure, belonging to the space group of I41/amd. the incorporation of a small amount of Zn to Ro.94Euo.06VO4 improved the emission characteristics. the emission intensities of the Gdo.88EUo.06Zno.06VO4 and Yo.9Euo.06Zno.04VO4 phosphors at 619 nm were 72% and 2 1% stronger than those of the Gdo,94Euo.06VO4 and Yo.94Euo.06VO4 phosphors, respectively. We demonstrated that the addi- tion of Zn to Ro.94Euo.06VO4 was quite effective for improving the photoluminescent properties.

关键词： rare earths photolurninescence vanadate ultrasonic spray pyrolysis

Numerical analysis of thermal plasma scrubber for CF4 decomposition

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Plasma Science and technology 2019年第6期21卷 9-14页

作者： J kO t H kim S CHOI Department of Nuclear and Energy Engineering Jeju National University Jeju 63243 Republic of Korea Institute for Nuclear Science and technology Jeju National University Jeju 63243 Republic of Korea

CF4 gas emitted in the semiconductor and display manufacturing process is a very harmful greenhouse *** must be removed or converted safely due to its extreme *** a CF4 decomposition system using a thermal plasma scrubber was commercialized,its removal efficiency is *** this work,a numerical analysis of CF4 decomposition in the thermal plasma scrubber was carried out in order to propose an efficient decomposition *** decomposition and recombination temperatures of CF4 were analyzed using thermodynamic equilibrium *** chemical reaction of CF4 decomposition into carbon and fluorine gas was considered in this numerical *** injection position and angle of the CF4 were controlled in order to enhance the decomposition *** vertical injection of CF4 near the torch exit improved the mixing of the CF4 with the thermal plasma *** addition,it was confirmed that the high temperature region expanded due to a vortex generated by strong turbulence in the bottleneck-shaped *** a result,it is revealed that the CF4 injection location and the reactor configuration are the most important factors in improving the decomposition rate.

关键词： numerical simulation decomposition CF4 thermal plasma scrubber

Acoustic Emission Monitoring and Microscopic Investigation of Cracks in ERCuNi Cladding

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Journal of Materials Science & technology 2003年第3期19卷 201-205页

作者： S.P.Lu O.Y.kwon k.J.Lee t.B.kim Department of Mechanical Engineering Inha University253 Yonghyun-dongInchon 402-751KoreaDepartment of Mechanical EngineeringInha University253 Yonghyun-dongInchon 402-751KoreaDepartment of Mechanical EngineeringInha University253 Yonghyun-dongInchon 402-751KoreaDepartment of Mechanical EngineeringInha University253 Yonghyun-dongInchon 402-751Korea

A corrosion resistant CuNi cladding was deposited on SM45C (equivalent to AISI1045) substrate by DC inverse arc welding. During the welding process, a three channel acoustic emission (AE) monitoring system was applied to detect the crack signals generating from both the cladding process and after cladding. Characteristics of the welding crack signal and noise signal had been analyzed systematically. Based on the record time of the signal, the solidification crack and delayed crack were distinguished. By two-dimensional AE source location, the crack position was located, and then investigated by scanning electron microscopy (SEM). Results showed that the AE system could detect the welding crack with high sensitivity and the two-dimensional source location could accurately determine the crack position. Microstructures of the cladding and heat affected zone (HAZ) were examined. Dendrites in the cladding and coarse grains in the HAZ were found.

关键词： Cladding Acoustic emission monitoring Crack CuNi alloy

应用物联网技术加速畜禽精准饲喂:从概念到实施

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Science Bulletin 2024年第14期69卷 2156-2160页

作者：苏家宜谭碧娥蒋宗勇吴德 C.M.Nyachoti Sung Woo kim 印遇龙王婧 key Laboratory of Hunan Province for the Products Quality Regulation of Livestock and Poultry College of Animal Science and TechnologyHunan Agricultural UniversityChangsha 410128China Institute of Animal Science Guangdong Academy of Agricultural SciencesGuangzhou 510640China key Laboratory for Animal Disease-Resistant Nutrition of the Ministry of Education of China and Animal Nutrition InstituteSichuan Agricultural UniversityChengdu 611130China Department of Animal Science University of ManitobaWinnipeg R3T 2N2Canada Department of Animal Science North Carolina State UniversityRaleigh 27695USA Laboratory of Animal Nutritional Physiology and Metabolic Process Key Laboratory of Agro-Ecological Processes in Subtropical RegionNational Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry ProductionInstitute of Subtropical AgricultureChinese Academy of SciencesChangsha 410128China Yuelushan Laboratory Changsha 410128China

Maximizing sow reproductive performance is vital for ensuring healthy piglet supply,feed efficiency,and profitability,which requires understanding factors such as nutrition,disease control,genetics,herd management,and their *** is well documented that most reproductive issues in sows stem from extreme fluctuations in body reserves[1].thus,optimizing reproduction should prioritize regulating body reserves and making continuous nutritional adjustments throughout a sow’s life[1,2].However,the traditional one-size-fits-all feeding strategy may not meet individual sow needs under varying *** feeding strategy leads to nutrient under-or over-feeding,which may result in a lack of performance and health issues on the one hand,and economic loss and negative environmental effects on the other.

关键词： feeding extreme reserves