A5033027451- Magnetic confinement fusion research
- Ionosphere and magnetosphere dynamics
- Superconducting Materials and Applications
- Particle accelerators and beam dynamics
- Solar and Space Plasma Dynamics
- Dust and Plasma Wave Phenomena
- Statistical Mechanics and Entropy
- Artificial Intelligence in Healthcare
- Advanced Thermodynamics and Statistical Mechanics
- Artificial Intelligence in Healthcare and Education
- Cold Atom Physics and Bose-Einstein Condensates
- Atomic and Subatomic Physics Research
- Theoretical and Computational Physics
- Quantum chaos and dynamical systems
- Laser-Plasma Interactions and Diagnostics
- Electronic Health Records Systems
- Spacecraft and Cryogenic Technologies
- Fusion materials and technologies
- Atomic and Molecular Physics
- Catalytic Processes in Materials Science
- Climate variability and models
- Plasma Diagnostics and Applications
- Network Traffic and Congestion Control
- Geomagnetism and Paleomagnetism Studies
- Advanced Differential Equations and Dynamical Systems
Samsung (South Korea)
2024
Sungkyunkwan University
2024
Hy-Line (United States)
2007
Korea Basic Science Institute
1997-2002
Korea Advanced Institute of Science and Technology
1984-2001
Korea Atomic Energy Research Institute
1999
The University of Texas at Austin
1984-1998
Fusion (United States)
1987-1992
Fusion Academy
1987
Université Libre de Bruxelles
1972
The Korea Superconducting Tokamak Advanced Research (KSTAR) project is the major effort of national fusion programme Republic Korea. Its aim to develop a steady state capable advanced superconducting tokamak establish scientific and technological basis for an attractive reactor. parameters are: radius 1.8 m, minor 0.5 toroidal field 3.5 T plasma current 2 MA, with strongly shaped cross-section double null divertor. initial pulse length provided by poloidal magnet system 20 s, but can be...
The extensive design effort for KSTAR has been focused on two major aspects of the project mission - steady-state-operation capability and advanced tokamak physics. steady state aspect is reflected in choice superconducting magnets, provision actively cooled in-vessel components, long pulse current drive heating systems. incorporated features associated with flexible plasma shaping, double null divertor passive stabilizers, internal control coils a comprehensive set diagnostics. Substantial...
Background The advancement of large language models (LLMs) offers significant opportunities for health care, particularly in the generation medical documentation. However, challenges related to ensuring accuracy and reliability LLM outputs, coupled with absence established quality standards, have raised concerns about their clinical application. Objective This study aimed develop validate an evaluation framework assessing applicability LLM-generated emergency department (ED) records, aiming...
Using the local kinetic and fluid approaches, effects of anisotropies in ion temperature gradient on toroidal driven mode are investigated. A study effect increasing relative to fixed electron peaked density limit is also made. Comparisons given between new results previous slab results.
Calculations for the stochastic diffusion of electrons in Tokamaks due to a spectrum electro-magnetic drift fluctuations are presented. The parametric dependence coefficient on amplitude and phase velocity spectrum, bounce frequency is studied. wavenumber taken be low order (5*5) randomly-phased, isotropic, monotonic extending from kperpendicular min approximately= omega ci/cs max approximately=3 pe/c with different power laws decrease phi k 1/km, 1<or=m<or=3. A nonlinear Ohm's law derived...
The scalings of the E×B turbulent diffusion coefficient D and Kolmogorov entropy K with potential amplitude φ̃ fluctuation are studied using geometrical analysis closed extended particle orbits for several types drift Hamiltonians. high-amplitude scalings, D∝φ̃2 or φ̃0 K∝log φ̃, shown to arise from different forms a periodic (four-wave) Hamiltonian φ̃(x,y,t), thereby explaining controversy in earlier numerical results. For quasirandom (six-wave) data D∝φ̃0.92±0.04 K∝φ̃0.56±0.17 presented...
Global drift wave map equations that allow the integration of particle orbits on long time scales are implemented to describe transport. Ensembles test particles tracked simulate low-confinement mode/reversed shear/enhanced reversed shear plasmas in Tokamak Fusion Test Reactor (TFTR) tokamak and Optimized Shear plasma Joint European Torus (JET) tokamak. The simulations incorporate a radial electric field, Ēr, obtained from neoclassical calculation [Zhu et al., Phys. Plasmas 6, 2503 (1999)]...
The KSTAR (Korea Superconducting Tokamak Advanced Research) project is the major effort of Korean National Fusion Program to design, construct, and operate a steady-state-capable superconducting tokamak. led by Korea Basic Science Institute shared national laboratories, universities, industry along with international collaboration. It in conceptual design phase aims for first plasma mid 2002. key features are: radius 1.8 m, minor 0.5 toroidal field 3.5 T, current 2 MA, flexible shaping...
In the ATM network, leaky bucket scheme is a promising method that regulates input traffics for preventive congestion control. order to satisfy loss probability constraint of more bursty traffic, it known with static token generation interval requires larger data buffer and pool size. This causes an increase in mean waiting time traffic pass scheme, which would be inappropriate real such as voice video. The authors present threshold-based intervals changes according occupancy. proposed...
<sec> <title>BACKGROUND</title> The advancement of large language models (LLMs) offers significant opportunities for health care, particularly in the generation medical documentation. However, challenges related to ensuring accuracy and reliability LLM outputs, coupled with absence established quality standards, have raised concerns about their clinical application. </sec> <title>OBJECTIVE</title> This study aimed develop validate an evaluation framework assessing applicability LLM-generated...
The flux-surface-averaged linearized resistive magnetohydrodynamic (MHD) boundary-layer equations including the compressibility, diamagnetic drift, and neoclassical viscosity terms are derived in toroidal geometry. These describe layer dynamics of MHD modes over collisionality regime between banana plateau Pfirsch–Schlüter. From resulting equations, effects on stability tearing ballooning investigated numerically. Also, a study is given for problem how mode generated as reduced. It shown...
The stabilizing effects of various terms such as compressibility, diamagnetic drift, and parallel thermal conduction are investigated on the type resistive ballooning modes whose driving force comes from region, which known to be unstable in high-beta second stability regime when analyzed incompressible limit. It is found that compressibility gives a significant effect mainly through perpendicular magnetic compression, suggests possibility stable window for these modes. drift slightly reduce...
Electron motion in a single electrostatic wave sheared magnetic field is shown to become stochastic the presence of second at an amplitude well below that obtained from overlapping pendulum resonance approximation. The enhanced stochasticity occurs for low parallel velocity electrons which trapping eE∥/m interacts strongly with E×B due shear. single-wave particle given by two-parameter family one-degree-of-freedom Hamiltonians bifurcate phase space topology three chains elliptic and...
Abstract It is pointed out that in relativistic plasmas the transverse-field energy density should be treated on a par with one-particle distribution function—that is, an enlarged Bogoliubov hypothesis used. shown that, if this not done, there will exist discrepancy between particle-particle correlation function as computed by Prigogine method and same quantity Klimontovich method. The implications for quasilinear theory of are briefly discussed.
The linearized flux-surface-averaged resistive magnetohydrodynamic equations, which include the electron diamagnetic drift and hot particle effects, are derived studied numerically. effect of on trapped particle-driven interchange mode is then investigated. It shown that can have a strong stabilization mode, similar to conventional case.