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Redox sensor QSOX1 regulates plant immunity by targeting GSNOR to modulate ROS generation

Molecular Plant 2021年第8期14卷 1312-1327页

作者： Ho Byoung Chae Min Gab Kim Chang Ho Kang joung hun park Eun Seon Lee Sang-Uk Lee Yong hun Chi Seol Ki Paeng Su Bin Bae Seong Dong Wi Byung-Wook Yun Woe-Yeon Kim Dae-Jin Yun David Mackey Sang Yeol Lee Division of Applied Life Sciences(BK21)and PMBBRC Gyeongsang National UniversityJinju 52828Korea College of Pharmacy Research Institute of Pharmaceutical ScienceGyeongsang National UniversityJinju 52828Korea School of Applied Biosciences College of Agriculture and Life SciencesKyungpook National UniversityDaegu 41566Korea Department of Biomedical Science and Engineering Konkuk UniversitySeoul 05029Korea Department of Horticulture and Crop Science Department of Molecular Geneticsand Center for Applied Plant SciencesThe Ohio State UniversityColumbusOH 43210USA College of Life Sciences Qingdao Agricultural UniversityQingdao 266109P.R.China Plant Propagation Team Plant Production DivisionSejong National ArboretumSejong 30106Korea

Reactive oxygen signaling regulates numerous biological processes,including stress responses in *** sensors transduce reactive oxygen signals into cellular ***,we present biochemical evidence that a plant quiescin sulfhydryl oxidase homolog(QSOX1)is a redox sensor that negatively regulates plant immunity against a bacterial *** expression level of QSOX1 is inversely correlated with pathogen-induced reactive oxygen species(ROS)***,QSOX1 both senses and regulates ROS levels by interactingn with and mediating redox regulation of S-nitrosoglutathione reductase,which,consistent with previous findings,influences reactive nitrogen-mediated regulation of ROS ***,our data indicate that QSOX1 is a redox sensorthat negatively regulates plant immunity by linking reactive oxygen and reactive nitrogen signaling to limit ROS production.

关键词： redox sensor plant immu nity QSOX1 GSNOR reactive oxygen species(ROS) reactive nitrogen species(RNS)

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Seismic hazard level reduction for existing buildings considering remaining building lifespans

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Earthquake Engineering and Engineering Vibration 2019年第3期18卷 649-661页

作者： Ji-hun park Division of Architecture and Urban Design Incheon National University

Seismic hazard levels lower than those for design of new buildings have been permitted for seismic evaluation and retrofi t of existing buildings due to the relatively short remaining lifespans. The seismic hazard reduction enables costeff ective seismic evaluation and retrofi t of existing buildings with limited structural capacity. The current study proposes seismic hazard reduction factors for Korea, one of low to moderate seismicity regions. The seismic hazard reduction factors are based on equal probabilities of non-exceedance within diff erent remaining building lifespans. A validation procedure is proposed to investigate equality of seismic risk in terms of ductility-based limit states using seismic fragility assessment of nonlinear SDOF systems, of which retrofi t demands are determined by the displacement coeffi cient method of ASCE 41-13 for diff erent target remaining building lifespans and corresponding reduced design earthquakes. Validation result shows that the use of seismic hazard reduction factors can be permitted in conjunction with appropriate lower bounds of the remaining building lifespans.

关键词： seismic hazard level existing building remaining building lifespan probability of limit state

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Observation of baroclinic eddies southeast of Okinawa Island

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Science China Earth Sciences 2008年第12期51卷 1802-1812页

作者： park Jae-hun Graduate School of Oceanography University of Rhode Island

In the region southeast of Okinawa, during May to July 2001, a cyclonic and an anticyclonic eddy were observed from combined measurements of hydrocasts, an upward-looking moored acoustic Doppler current profiler (MADCP), pressure-recording inverted echo sounders (PIESs), satellite altimetry, and a coastal tide gauge. The hydrographic data showed that the lowest/highest temperature (T) and salinity (S) anomalies from a 13-year mean for the same season were respectively ?3.0/+2.5°C and ?0.20/+0.15 psu at 380/500 dbar for the cyclonic/anticyclonic eddies. From the PIES data, using a gravest empirical mode method, we estimated time-varying surface dynamic height (D) anomaly referred to 2000 dbar changing from ?20 to 30 cm, and time-varying T and S anomalies at 500 dbar ranging through about ±2 and°C ±0.2 psu, respectively. The passage of the eddies caused variations of both satellite-measured sea surface height anomaly (SSHA) and tide-gauge-measured sea level anomaly to change from about ?20 to 30 cm, consistent with the D anomaly from the PIESs. Bottom pressure sensors measured no variation related to these eddy activities, which indicated that the two eddies were dominated by baro-clinicity. Time series of SSHA map confirmed that the two eddies, originating from the North Pacific Subtropical Countercurrent region near 20°–30°N and 150°–160°E, traveled about 3000 km for about 18 months with mean westward propagation speed of about 6 cm/s, before arriving at the region southeast of Okinawa Island.

关键词： baroclinic eddy southeast of Okinawa Island PIES ADCP

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Integrated guidance and control for damping augmented system via convex optimization

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Chinese Journal of Aeronautics 2022年第7期35卷 30-39页

作者： Bong-Gyun park Tae-hun KIM The 1^(st)R&D Institute-4 Agency for Defense DevelopmentDaejeon 34186Republic of Korea

In this paper,an integrated guidance and control approach is presented to improve the performance of the missile *** approach includes damping augmented system with attitude rate feedback to decrease the oscillation during the homing phase for missiles with low *** addition,physical constraints,which can affect the performance of the missile interception,such as acceleration limit,seeker’s look angle,and look angle rate constraints are *** integrated guidance and control problem is formulated as a convex quadratic optimization problem with equality and inequality constraints,and the solution is obtained by a primal–dual interior point *** performance of the proposed method is verified through several numerical examples.

关键词： Convex optimization Damping augmented system Integrated guidance and control Physical constraint Primal-dual interior point method

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Modular Multilevel Converter with Wireless Magnetic Power Decoupling for Three-phase MV Adjustable-speed Drives

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CSEE Journal of Power and Energy Systems 2022年第5期8卷 1497-1507页

作者： Mohamed Atef Tawfik Mohammad Sameer Irfan Ashraf Ahmed joung-Hu park Department of Electrical Engineering Soongsil UniversitySeoul 156-743South Korea

In this paper,we propose a modular multilevel converter(MMC)with a wireless magnetic power decoupling approach suitable for medium-voltage high-power variable-speed machine *** proposed power decoupling approach is independent of the operating frequency,which solves the issue of wide fluctuations of low-frequency voltage ripple components in submodule(SM)capacitors,especially at low-speed operations without using any ripple power *** wireless magnetic elements reduces the amount of high-voltage insulation between the transformer windings,resulting in a significant reduction in the overall size of the *** basic idea of our proposed approach is to magnetically couple the instantaneous three-phase ripple power of each of the three adjacent-arm *** proposed MMC is free from low-frequency capacitors,resulting in enhanced system reliability,volume,and *** operation principles of the proposed MMC are explained,and a control design is *** performance of the proposed scheme was verified via simulation and experimental tests.

关键词： Modular multilevel converter power decoupling submodule capacitor voltage ripple variable-speed drives wireless high-frequency transformer

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Decomposition of Nitrogen Trifluoride Using Low Power Arc Plasma

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Plasma Science and Technology 2013年第9期15卷 923-927页

作者： Jee-hun KO Sooseok CHOI Hyun-Woo park Dong-Wha park Department of Chemical Engineering and Regional Innovation Center for Environmental Technology of Thermal Plasma (RIC-ETTP)INHA University253 Yonghyun-dongNam-guIncheon 402-751Republic of Korea Department of Environmental Chemistry and Engineering Tokyo Institute of Technology 4259-G1-22Nagatsuta-choMidori-kuYokohama 226-8502Japan

The low power arc plasma is characterized by extremely high enthalpy and temper- ature and it is easy to generate and control, and thus thermal decomposition process based on the plasma torch is receiving a great attention for decomposing non-degradable greenhouse gases. In order to elevate the economic feasibility, the effects of input power, waste gas flow rate and additive gases on the destruction and removal efficiency （DRE） of NF3 are examined. Specific energy density （SED） deceases as the flow rate increases, and accordingly, the DRE is reduced. The DRE is basically determined by the specific energy density. The highest DRE of NF3 was 97% for the waste gas flow rate of 100 L/min at a low input power level of 2 kW with the help of hydrogen additional gas. The inlet and outlet concentration of NF3 was analyzed using Fourier transform infrared spectroscopy （FT-IR） for DRE of NF3 evaluation. As a result, large amount of NF3 can be efficiently decomposed by low power arc plasma systems.

关键词： arc plasma decomposition nitrogen trifluoride

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Multidimensional Hybrid Architecture Encapsulating Cobalt Oxide Nanoparticles into Carbon Nanotube Branched Nitrogen-Doped Reduced Graphene Oxide Networks for Lithium–Sulfur Batteries

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Energy & Environmental Materials 2022年第2期5卷 555-564页

作者： Jeong Seok Yeon Young hun Ko Tae Ho park Hyunyoung park Jongsoon Kim Ho Seok park School of Chemical Engineering College of EngineeringSungkyunkwan University2066Seobu-roJangan-guSuwon-si Gyeonggi-do 440-746Korea Advanced Batteries Research Center Korea Electronics Technology Institute25Saenari-roBundang-guSeongnam-si Gyeonggi-do 13509Korea Department of Energy Science Sungkyunkwan University2066Seobu-roJangan-guSuwon-si Gyeonggi-do 440-746Korea Department of Health Sciences and Technology Samsung Advanced Institute for Health Sciences and Technology(SAIHST)Sungkyunkwan University2066SeoburoJangan-guSuwon 440-746South Korea

Lithium–sulfur batteries(LSBs)are regarded as promising candidates for the next-generation energy storage devices owing to their high-theoretical capacity(1675 mAh g^(−1))and affordable ***,several limitations of LSBs such as the lithium polysulfide shuttle,large volume expansion,and low electrical conductivity of sulfur need to be resolved for practical *** address these limitations,herein,a multidimensional architectured hybrid(Co@CNT/nG),where Co_(3)O_(4) nanoparticles are encapsulated into threedimensional(3D)porous N-doped reduced graphene oxide interconnected with carbon nanotube(CNT)branches,is synthesized through a simple pyrolysis *** synergistic effect achieved through the homogeneously distributed and encapsulated Co_(3)O_(4) nanoparticles,the interconnected CNT branches,and the 3D hierarchical porous structure and N-doping of Co@CNT/nG significantly suppresses the shuttle effect of lithium polysulfides and enhances the conversion redox kinetics for the improved sulfur *** validate this effect through various measurements including symmetric cells,Li_(2)S nucleation,shuttle currents,Tafel slopes,diffusion coefficients,and post-mortem ***,Co@CNT/nG-70S-based LSB cells achieve a high-specific capacity of 1193.1 mAh g^(−1) at 0.1 C and a low capacity decay rate of 0.030%per cycle for 700 cycles at 5 C,delivering a high areal capacity of 5.62 mAh cm^(−2) even with a loading of 6.5 mg cm^(−2).

关键词： graphene/CNT hybrid lithium-sulfur batteries multidimensional architecture nanoparticle encapsulation redox promoter

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Acheivement of Nano-Scale SiGe Layer with Discrete Ge Mole Fraction Profile Using Batch-Type HVCVD

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Journal of Rare Earths 2004年第z2期22卷 178-182页

作者： Gon-sub Lee Tae-hun Shim Jea-gun park Advanced Semiconductor Material and Device Development Center Hanyang UniversitySeoul 133-791Korea Advanced Semiconductor Material and Device Development CenterHanyang UniversitySeoul 133-791Korea Advanced Semiconductor Material and Device Development CenterHanyang UniversitySeoul 133-791Korea

The strained Si grown on the relaxed SiGe-on-insulator C-MOSFET's is a promising device for the future system LSI devices with the design rule of sub-micron. The achievement of the discrete Ge mole fraction in the SiGe layer is a key engineering in low-temperature SiGe epitaxial growth using HVCVD. The pre-flow of GeH4 gas enhanced the Ge mole fraction and SiGe layer thickness. In addition, the Ge mole fraction and SiGe layer thickness increases with the gas ratio of GeH4/SiH4 + GeH4, process temperature, and gas flow time. However, the haze was produced if the Ge mole fraction is above 22wt%. The discrete-like Ge mole fraction with 22 wt% in 10 nm SiGe layer was obtained by the pre-flow of GeH4 for 10 s, the mixture gas ratio of GeH4/SiH4 + GeH4 of 67%, and the gas flow time for 150 s at the process temperature of 550 C.

关键词： strained Si nano scale SiGe layer Ge mole fraction HVCVD gas flow boat-out time

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Multiplexed electrospraying of water in cone-jet mode using a UV-embossed pyramidal micronozzle film

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Microsystems & Nanoengineering 2022年第5期8卷 247-256页

作者： Ji-hun Jeong Kwangseok park Hyoungsoo Kim Inyong park Jinyoung Choi Seung S.Lee Department of Mechanical Engineering Korea Advanced Institute of Science and TechnologyDaejeon 34141Republic of Korea Department of Environmental Machinery Korea Institute of Machinery and MaterialsDaejeon 34103Republic of Korea Department of Mechanical Engineering Dongshin UniversityNaju 58245Republic of Korea

The electrospraying of water in the cone-jet mode is difficult in practical applications owing to its low throughput and the electrical discharge caused by the high surface tension of water.A film with multiple dielectric micronozzles is essential for multiplexed electrospraying of water in cone-jet mode without electrical ***,a pyramidal micronozzle film with five nozzles was fabricated using the UV-embossing *** pyramidal micronozzle film consisted of pyramidal micronozzles,a micropillar array,and an in-plane extractor,which were proposed to minimize wetting and concentrate the electric field to the water meniscus at the tip of the pyramidal *** electrospraying of water using a single pyramidal micronozzle was visualized by a high-speed camera at a flow rate of 0.15–0.50ml/h with voltages of 0.0–2.3 kV,−1.6 kV,and−4.0 kV at the water,guide ring,and collector,*** distinct modes,the dripping,spindle,and cone-jet modes,were observed and distinguished according to the motion of the water meniscus at the nozzle *** steady Taylor cone and jet were observed in a voltage range of 1.3–2.0 kV in water,particularly in cone-jet *** electrospraying of water in cone-jet mode at a flow rate of 1.5ml/h was performed using a pyramidal micronozzle film,demonstrating the potential for a high-throughput electrospraying system.

关键词： process. film pyramidal

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Variability of the Dokdo Abyssal Current observed in the Ulleung Interplain Gap of the East/Japan Sea

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Acta Oceanologica Sinica 2013年第1期32卷 12-23页

作者： KIM Yun-Bae CHANG Kyung-Il park Jae-hun park Jong Jin East Sea Research Institute Korea Institute of Ocean Science and Technology Research Institute of Oceanography School of Earth and Environmental Sciences Seoul National University Ocean Science Research Department Korea Institute of Ocean Science and Technology Department of Oceanography Kyungpook National University

Subinertial fluctuation of a strong northward deep current, which is referred to the Dokdo Abyssal Current （DAC） by Chang et al. （2009）, is investigated from current records for about 16.5 and 8.0 months in the Ulle- ung Interplain Gap of the East/lapan Sea. The current below 300 m is bottom-intensified and has nearly depth-independent flow. Near bottom, the spectral peaks of the current were found near 10, 20, and 60 d. The DAC variability near 10 d and 20 d is reasonably consistent with the linear theory of topographic Rossby waves （TRWs） in the following aspects：（1） The motion is columnar and bottom-intensified; （2） the theo- retical cutoff frequency is similar to the observation; （3） The observation-based angles of the wavenumber vector are in good agreement with the theoretical ones. The wavelengths of the TRWs with periods of near 10 d and 20 d near Dokdo are significantly shorter than those with similar timescales in the open oceans （100-250 km）. It is primarily due to the weak stratification below 300 m in the East Sea. The deep cur- rent fluctuations with periods of near 10 d and 20 d were accompanied by warm events in the upper layer resulting from eddying processes and/or meandering of the Tsushima Warm Current.

关键词： East/Iapan Sea Ulleung Interplain Gap Deep currents Topographic Ressby waves

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