A5037008488- Meteorological Phenomena and Simulations
- Tropical and Extratropical Cyclones Research
- Precipitation Measurement and Analysis
- Climate variability and models
- Ocean Waves and Remote Sensing
- Wind and Air Flow Studies
- Cryospheric studies and observations
- Magnetic properties of thin films
- Atmospheric aerosols and clouds
- Advancements in Semiconductor Devices and Circuit Design
- Quantum, superfluid, helium dynamics
- Magnetic Properties and Applications
- ZnO doping and properties
- Magnetic Properties of Alloys
- Semiconductor materials and devices
- Soil Moisture and Remote Sensing
- Atomic and Subatomic Physics Research
- Ionosphere and magnetosphere dynamics
- GaN-based semiconductor devices and materials
- Geological and Geophysical Studies
- Geological formations and processes
- Underwater Acoustics Research
- Aeolian processes and effects
- Silicon Carbide Semiconductor Technologies
- GNSS positioning and interference
Chinese Culture University
2010-2024
Kyungpook National University
2018-2023
Laboratoire de l'Atmosphère et des Cyclones
2020-2021
Météo-France
2020-2021
Centre National de la Recherche Scientifique
2020-2021
National Taiwan University
2014-2020
Taiwan Semiconductor Manufacturing Company (Taiwan)
2010-2014
National Cheng Kung University
2007
Abstract This study uses high-resolution radar and surface observations to investigate the finescale structural evolution of airflow precipitation over complex terrain in Pyeongchang area, South Korea. The Taebaek Mountain range (TMR) runs parallel northeastern coast Korea, with a perpendicular ridge known as branch (PCB). objective this was identify mechanisms wintertime these topographic features during passage low pressure system (LPS) through southern Korean Peninsula. analysis indicates...
Abstract. Snowfall in the northeastern part of South Korea is result complex snowfall mechanisms due to a highly contrasting terrain combined with nearby warm waters and three synoptic pressure patterns. All these factors together create unique combinations, whose disentangling can provide new insights into microphysics snow on planet. This study focuses impact wind flow topography drawing 20 events during ICE-POP 2018 (International Collaborative Experiment for PyeongChang Olympic...
The international research program “ReNovRisk-CYCLONE” (RNR-CYC, 2017–2021) directly involves 20 partners from 5 countries of the south-west Indian-Ocean. It aims at improving observation and modelling tropical cyclones in Indian Ocean, as well to foster regional cooperation improve public policies adapted present future risk this cyclonic basin. This paper describes structure main objectives ambitious project, with emphasis on its observing components, which allowed integrating numbers...
Abstract The evolution of tropical cyclone activity under climate change remains a crucial scientific issue. Physical theory cyclogenesis is limited, observational datasets suffer from heterogeneities in space and time, state-of-the-art models used for future projections are still too coarse ( ~ 100 km resolution) to simulate realistic systems. Two approaches can nevertheless be considered: 1) perform dedicated high-resolution (typically <50 km) experiments which cyclones tracked 2)...
Abstract This study uses temporally high-resolution surface observations, Doppler radar, and micro rain radar to document the finescale features of two landfalling rainbands associated with Typhoon Longwang (2005) as they passed over northern Taiwan. The present case allows a unique opportunity investigate well-defined, convectively active tropical cyclone land. In particular, pressure fluctuations observed during passage their possible causes are explored. were predominantly convective in...
Abstract This study uses ground-based dual-Doppler radar and surface observations to document the structural features of arc-shaped echoes (ASREs) evident along an outer rainband Typhoon Longwang as it approached northern Taiwan on 1 October 2005. The particular aim this is explore possible distinction between present case, previously documented tropical cyclone rainbands (TCRs), squall lines. dual-Doppler-derived fields show that leading precipitation studied ASREs exhibited a convective...
During the International Collaborative Experiments for Pyeongchang 2018 Olympic and Paralympic winter games (ICE-POP 2018), a strong windstorm occurred on lee side of Taebaek Mountains 14 February 2018, when low-pressure system passed through northern part Korean Peninsula. At that time, prevailing westerly wind with warm advection an inversion layer at top mountains provided favorable conditions downslope windstorm, resulting in structural damage Park. This led to delay cancellation ski...
This study utilized ground‐based Doppler radar observations to document the detailed structures of an outer tropical cyclone rain band ( TCR ) Typhoon Longwang (2005) as passed over topography northern Taiwan on 1 October 2005. The was oriented northeast–southwest and roughly parallel mountain barrier with a higher (lower) terrain height in its southern (northern) landfalling segment. During pre‐landfall stage, characterized by convective precipitation inner side, where front‐to‐rear flow...
The ReNovRisk-Cyclone program aimed at developing an observation network in the south-west Indian ocean (SWIO) close synergy with implementation of numerical tools to model and analyze impacts tropical cyclones (TC) present a context climate change. This paper addresses modeling part program. First, unique coupled system simulate TCs SWIO is developed. ocean–wave–atmosphere coupling considered along coherent between sea surface state, wind field, aerosol, microphysics, radiation. illustrated...
Films of L11-type CoPt/NiFe exchange springs were grown with different NiFe (Permalloy) layer thickness (tNiFe = 0–10 nm). X-ray diffraction analysis reveals that the characteristic peak position NiFe(111) is not affected by CoPt-layer—confirming absence any inter-diffusion between CoPt and layers. Magnetic studies indicate magnetization orientation can be tuned through varying tNiFe perpendicular magnetic anisotropy films cannot sustain for larger than 3.0 nm due to existence interaction at...
Abstract. Acquisition of accurate raindrop fall speed measurements outdoors in natural rain by means moderate-cost and easy-to-use devices represents a long-standing challenging issue the meteorological community. Feasibility experiments were conducted to evaluate indoor accuracy made with high-speed camera its capability for outdoor applications. An experiment operating calm conditions showed that imaging technique can provide mean error 4.1–9.7 % compared Gunn Kinzer's empirical...
Abstract On 23 July 2014, a commercial aircraft (GE222) crashed near the Ma-Gong Airport on Penghu Island off southwestern coast of Taiwan as it struggled to land in stormy weather that was caused by outer tropical cyclone rainbands (OTCRs) Typhoon Matmo. This study aims document detailed aspects airflow and precipitation OTCRs through high-resolution radar surface observations identify how these observed structures contribute aviation hazards. Analyses indicate at airport significantly...
We herein explore the possibility of obtaining tunable tilted magnetic anisotropy in ordered-CoPt (5 nm)/NiFe(tNiFe) bilayers through modifying their exchange spring behavior by inserting Pt and Ru-spacers. The tuning process tilt angle magnetization NiFe-layer was systematically investigated varying or Ru thickness (tPt tRu) from 0 to 8 nm at different thicknesses NiFe (tNiFe = 1.5, 4.0, 6.0 nm). Polar magneto-optic Kerr effect (p-MOKE) studies reveal that grown absence spacers exhibit...
Abstract. The WISSDOM (Wind Synthesis System using Doppler Measurements) synthesis scheme was developed to derive high-resolution 3-dimensional (3D) winds under clear-air conditions. From this variational-based scheme, detailed wind information obtained from scanning lidars, automatic weather stations (AWSs), sounding observations, and local reanalysis datasets (LDAPS, Local Data Assimilation Prediction System), which were utilized as constraints minimize the cost function. objective of...
The diagonal squall line that passed through the Korean Peninsula on 18 May 2020 was examined using wind data retrieved from multiple Doppler radar synthesis focusing its kinematic and dynamic aspects. low-level jet, along with warm moist air in lower level, served as primary source of moisture supply during initiation formation process. presence a cold pool accompanying played role retaining at surface. As approached Peninsula, convective bands northern segment (NS) southern (SS) exhibited...
In this paper, the reliable SiN <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">x</inf> /AlGaN/GaN MISHEMTs on silicon substrate with improved trap-related characteristics have been well demonstrated. The devices our proposed treatment method showed less deep-level traps and more Si surface donors at -AlGaN interface. trap related device are also by using optimized method. exhibit current collapse better positive bias temperature stability of...
Abstract. Snowfall in north-eastern part of South Korea is the result complex snowfall mechanisms due to a highly-contrasting terrain combined with nearby warm waters and three synoptic pressure patterns. All these factors together create unique combinations, whose disentangling can provide new insights into microphysics snow planet. This study focuses on impact wind flow topography drawing twenty events during ICE-POP 2018 (International Collaborative Experiment for Pyeongchang Olympic...
Abstract A strong wind event under clear‐air conditions during the 2018 Winter Olympic and Paralympic games in Pyeongchang, Korea, was examined using various datasets. High spatiotemporal resolution information obtained by Doppler lidars, automatic weather stations, profiler, sounding observations, reanalysis datasets International Collaborative Experiments for Pyeongchang winter (ICE‐POP 2018). This study aimed to understand possible mechanisms of localized winds across a high mountainous...
In the paper, a new application and development of highly integrated GPS receiver with reflected signals for Ground Object Detection Digital Terrain Elevation Mapping will be described. First all, both RHCP LHCP antennas are employed so that direct can acquired simultaneously. The direction arrival may along signal path or even line-of-sight particular satellite. goal study is to exploit carrier phase, reflectivity Ll/L2 SNR components stream fresh water, ocean water ground object detection...
Abstract. A WISSDOM (Wind Synthesis System using Doppler Measurements) synthesis scheme was developed to derive high-resolution 3-dimensional (3D) winds under clear-air conditions. From this variational-based scheme, detailed wind information obtained from scanning lidars, automatic weather stations (AWSs), sounding observations, and local reanalysis datasets (LDAPS, Local Data Assimilation Prediction System), which were utilized as constraints minimize the cost function. The objective of...