A5103079569- Magnetic confinement fusion research
- Ionosphere and magnetosphere dynamics
- Solar and Space Plasma Dynamics
- Galaxies: Formation, Evolution, Phenomena
- Cosmology and Gravitation Theories
- Dark Matter and Cosmic Phenomena
- Magnetic and transport properties of perovskites and related materials
- Geophysical and Geoelectrical Methods
- Electric Power System Optimization
- Laser-Plasma Interactions and Diagnostics
- Geomagnetism and Paleomagnetism Studies
- Astro and Planetary Science
- Nuclear Physics and Applications
- Thermal Analysis in Power Transmission
- Water Quality Monitoring and Analysis
- Marine and coastal ecosystems
- Magnetic Properties of Alloys
- Power Systems and Renewable Energy
Dartmouth College
2020-2025
National Taiwan University
2018
The rate of magnetic reconnection is the utmost importance in a variety processes because it controls, for example, energy released solar flares, speed Dungey convection cycle Earth's magnetosphere, and release harmful geomagnetic substorms. It known from numerical simulations satellite observations that approximately 0.1 normalized units, but despite years effort, full theoretical prediction has not been obtained. Here, we present first-principles theory non-relativistic electron-ion...
Wave dark matter ($\ensuremath{\psi}\mathrm{DM}$), which satisfies the Schr\"odinger-Poisson equation, has recently attracted substantial attention as a possible candidate. Numerical simulations have, in past, provided powerful tool to explore this new territory of possibility. Despite their successes revealing several key features $\ensuremath{\psi}\mathrm{DM}$, further progress is limited, that cosmological so far can only address formation halos below...
Abstract Using three‐dimensional particle‐in‐cell (PIC) simulations, we study the spread of magnetic reconnection X‐line. We show that structural asymmetries along X‐line direction develop during its spread. On plane current sheet (i.e., corresponding to equatorial magnetotail), sharp cusp‐shaped signatures ion‐drifting direction, capturing The spreading is catalyzed by lower ion pressure from active diffusion region, and spreads at speed non‐reconnecting sheet. Along electron‐drifting...
During magnetically dominated relativistic reconnection, inflowing plasma depletes the initial pressure at x-line and collisionless heating inside diffusion region is insufficient to overcome this loss. The resulting drop causes a collapse x-line, essentially localization mechanism of necessary for fast reconnection. extension low-pressure further explains bursty nature anti-parallel reconnection because once opened outflow exhaust can also collapse, which repeatedly triggers secondary...
Using two-dimensional (2D) magnetohydrodynamics simulations, we show that Petschek-type magnetic reconnection can be induced using a simple resistivity gradient in the outflow direction, revealing key ingredient of steady fast collisional limit. We find diffusion region self-adjusts its half-length to fit given scale resistivity. The x-line and flow stagnation point always reside within transition closer higher end. opening one exhaust by this will lead other located on side x-line, uniform...
The purpose of this study is to improve our understanding the effects in-waterchlorophyll a,total pigment and total suspended matter(TSM)on optical properties ofcoastal water oceanic around Taiwan.An underwater spectroradiometer isused measure vertical profile downwelling upwelling irradiance in thevisible 400nm 700nm wavelengths coastal offshore waters Taiwan.The results show that relationship against chlorophyll a TSMshows exponential function.The optic depth a,totalpigment TSM shows...