A5002518264- Climate variability and models
- Atmospheric Ozone and Climate
- Meteorological Phenomena and Simulations
- Atmospheric and Environmental Gas Dynamics
- Atmospheric chemistry and aerosols
- Carbon Nanotubes in Composites
- Tropical and Extratropical Cyclones Research
- Catalytic Cross-Coupling Reactions
- Mechanical and Optical Resonators
- Force Microscopy Techniques and Applications
- Atmospheric aerosols and clouds
- Ecosystem dynamics and resilience
- Cryospheric studies and observations
- Catalytic C–H Functionalization Methods
- Oceanographic and Atmospheric Processes
- Liver physiology and pathology
- Climate change and permafrost
- Liver Disease Diagnosis and Treatment
- Electrocatalysts for Energy Conversion
- demographic modeling and climate adaptation
- Electrospun Nanofibers in Biomedical Applications
- Ginseng Biological Effects and Applications
- Near-Field Optical Microscopy
- Marine Bivalve and Aquaculture Studies
- Fuel Cells and Related Materials
Seoul National University
2009-2025
National Heart Lung and Blood Institute
2025
APEC Climate Center
2022-2024
Pusan National University
2014-2024
Institute for Basic Science
2020-2024
IBS Center for Climate Physics
2022-2024
National Institutes of Health
2024
Korea Advanced Institute of Science and Technology
2008-2019
Nanyang Technological University
2019
LG Chem (South Korea)
2019
Electrochemical splitting of water is an attractive way to produce hydrogen fuel as a clean and renewable energy source. However, major challenge accelerate the sluggish kinetics anodic half‐cell reaction where oxygen evolution (OER) takes place. Here, seamlessly conductive 3D architecture reported with carbon‐shelled Ni‐Co nanowire network highly efficient OER electrocatalyst. Highly porous granular nanowires are first grown on carbon fiber woven fabric utilizing cost‐effective hydrothermal...
Abstract. While climate change mitigation targets necessarily concern maximum mean state changes, understanding impacts and developing adaptation strategies will be largely contingent on how variability responds to increasing anthropogenic perturbations. Thus far Earth system modeling efforts have primarily focused projected changes the sensitivity of specific modes variability, such as El Niño–Southern Oscillation. However, our knowledge forced in overall spectrum higher-order statistics is...
Abstract The February–March 2014 deployment of the National Aeronautics and Space Administration (NASA) Airborne Tropical Tropopause Experiment (ATTREX) provided unique in situ measurements western Pacific tropical tropopause layer (TTL). Six flights were conducted from Guam with long-range, high-altitude, unmanned Global Hawk aircraft. ATTREX payload water vapor, meteorological conditions, cloud properties, tracer chemical radical concentrations, radiative fluxes. campaign was partially...
Abstract Nonalcoholic fatty liver disease (NAFLD) is an important health concern worldwide and progresses into nonalcoholic steatohepatitis (NASH). Although prevalence severity of NAFLD/NASH are higher in men than premenopausal women, it remains unclear how sex affects pathophysiology. Formyl peptide receptor 2 (FPR2) modulates inflammatory responses several organs; however, its role the unknown. Here we show that FPR2 mediates sex-specific to diet-induced NAFLD/NASH. NASH-like injury was...
Abstract The seasonal cycle is the dominant mode of variability in air‐sea CO 2 flux most regions global ocean, yet discrepancies between different seasonality estimates are rather large. As part Regional Carbon Cycle Assessment and Processes Phase project (RECCAP2), we synthesize surface ocean p from models observation‐based estimates, focusing on both a present‐day climatology decadal changes 1980s 2010s. Four main findings emerge: First, biogeochemistry (GOBMs) ( products) disagree...
Abstract Processes that influence the humidity and cirrus cloud abundance in Tropical Tropopause Layer (TTL) during boreal winter 2006–2007 are investigated simulations of clouds along backward trajectories parcels ending at 372 K potential temperature (100 hPa) level tropics. Trajectories calculated using offline calculations seasonal mean tropical radiative heating rates with reanalysis wind data enhanced wave‐driven variability TTL. The one‐dimensional (vertical) time‐dependent...
Abstract Cirrus clouds in the tropical tropopause layer (TTL) and water vapor transported into stratosphere have significant impacts on global radiation budget circulation patterns. Climate models, however, large uncertainties representing dehydration cloud processes TTL, thus their feedback surface climate, prohibiting an accurate projection of future regional climate changes. Here we use unprecedented airborne measurements over Pacific to reveal atmospheric waves as a strong modulator ice...
Abstract The impact of high‐frequency gravity waves on homogeneous‐freezing ice nucleation in cold cirrus clouds is examined using parcel model simulations driven by superpressure balloon measurements temperature variability experienced air parcels the tropical tropopause region. We find that primary influence to generate rapid cooling events drive production numerous crystals. Quenching tendency reversal highest‐frequency does occasionally produce low concentrations, but overall increase...
While climate change mitigation targets necessarily concern maximum mean state changes, understanding impacts and developing adaptation strategies will be largely contingent on how variability responds to increasing anthropogenic perturbations. Here we present a new 100-member large ensemble of projections conducted with the Community Earth System Model version 2 examine sensitivity internal fluctuations greenhouse warming. Our unprecedented simulations reveal that changes in variability,...
OBJECTIVESThe American Heart Association (AHA) recently defined cardiovascular-kidney-metabolic (CKM) syndrome to better characterize the associations among cardiovascular, kidney, and metabolic diseases. Although about 9 in 10 U.S. adults have at least 1 risk factor for CKM syndrome, its prevalence other populations is less understood. To fill this gap, we examined of South Korea association with demographic socioeconomic status (SES). METHODSUsing data from Korean National Health Nutrition...
Highly pure metallic single-walled carbon nanotubes were continuously extracted from a mixture of semiconducting and species using nondestructive, scalable method. Two laminar streams generated in an H-shaped microfluidic channel with two inlets outlets. The flow conditions carefully controlled to minimize diffusive convective transport across the boundary between flows. Dielectrophoretic force embedded electrode at junction stream nanotube suspension toward other buffer solution without...
Abstract Cold point tropopause temperature is a key regulator of cirrus clouds and stratospheric water vapor, which have significant impacts on the Earth's radiation budget climate. Using tropical radiosonde observations, we show that waves in layer lower cold by 1.6 K average relative to seasonal mean. Furthermore, wave activity has not been constant over last 2.5 decades, altering magnitude at decadal scale. The change direct impact partially (~20–30%) responsible for sudden decrease vapor...
Abstract Tropical precipitation characteristics are investigated using the Rainfall Measuring Mission (TRMM) 3-hourly estimates, and result is compared with five reanalyses including European Centre for Medium-Range Weather Forecasts (ECMWF) Interim Re-Analysis (ERA-Interim), Modern Era Retrospective Analysis Research Applications (MERRA), National Centers Environmental Prediction (NCEP)–National Center Atmospheric (NCAR) reanalysis (NCEP1), NCEP–U.S. Department of Energy (DOE) (NCEP2),...
In this paper, as an active technique for detecting the islanding, voltage magnitude variation method of distributed generation (DG) unit is proposed. The proposed new algorithm detects islanding by distinguishing differences in system characteristic between those experienced when DG running parallel with utility supply and it operating independently. operation mode, due to high capacity system, any change produces smaller at inter-tie point than that larger injecting reactive power mode....
Tumor necrosis factor-inducible gene 6 protein (TSG-6), one of the cytokines released by human mesenchymal stem/stromal cells (hMSC), has an anti-inflammatory effect and alleviates several pathological conditions; however, hepatoprotective potential TSG-6 remains unclear. We investigated whether promoted liver regeneration in acute failure. The immortalized hMSC (B10) constitutively over-expressing or empty plasmid (NC: Negative Control) were established, either NC-conditioned medium (CM)...
Abstract Future smart mobile electronics and wearable robotics that can perform delicate activities controlled by artificial intelligence require rapid motion actuators working at low voltages with acceptable safety improved energy efficiency. Accordingly, ionic soft have great potential over other counterparts because they exhibit gentle movements voltages, less than 2 V. However, these currently show deficient performances sub‐1 V in the high‐frequency range of lack electrode materials...
To fabricate an atomic force microscope tip with attached carbon nanotube (CNT), we simulated dielectrophoresis, produced by a nonuniform electric field. We calculated the dielectrophoretic and torque of CNTs dispersed in fluid. then investigated effect various parameters such as initial conditions CNT, distance between electrode, shape tip's apex. Using results simulation, examined assembly for achieving high success rate. In particular, found that optimal electrode was 10 microm.
Liver fibrosis is a major pathological feature of chronic liver diseases, including cancer. MicroRNAs (miRNAs), small noncoding RNAs, regulate gene expression posttranscriptionally and play important roles in various kinds diseases; however, miRNA-associated hepatic fibrogenesis its acting mechanisms are poorly investigated. Therefore, we performed an miRNA microarray the fibrotic livers Mus musculus treated with carbon-tetrachloride (CCl₄) analyzed biological functions engaged by target...
The impact of microplastics (MPs) on the metabolic functions liver is currently unclear and not completely understood. To investigate effects administration MPs hepatic metabolism normal obese mice, alterations in lipid, glucose (Glu), amino acid regulation pathways were analyzed adipose tissues C57BL/6Korl (wild type, WT) or C57BL/6-Lepem1hwl/Korl mice (leptin knockout, Lep KO) orally administered polystyrene (PS) for 9 weeks. Significant lipid accumulation, adipogenesis, lipogenesis,...