<세미나>

매주 월요일: 10:00 - 12:00, at ASTC 610

Intensive Seminar 주제: Principal component analysis를 이용한 spectrosocpy 분석. Derivation of potential jump and normal derivative jump across thin inhomogeneities

메주 화요일 10:00 - 12:00, at ASTC 610

Intensive Seminar 주제: Anisotropic admittivity anomaly detection using electrical impedance spectroscopic imaging system

메주 수요일 (W) 10:00 - 12:00, at ASTC 610

Intensive Seminar 주제: Change of effective conductivity of fabric due to pressure / Homogenization

매주 목요일: 2015/07/16 (T) 10:00 - 12:00, at ASTC 610

Intensive Seminar 주제: Functional magnetic resonance electrical impedance tomography

매주 금요일: 10:00 - 12:00, at ASTC 610

Intensive Seminar 주제: 전기 임피던스를 이용한 심폐기능 모니터링, principle component analysis

<자문 및 토의>

From 4th July to 29th July 2015 :

July 4,6,7,8,9,10,11,13,14,15,16,17,18,20,21,22,23,24,25,27,28,29 (22days)

Discussions with Tingting Zhang about ‘Identification of thin insulating inhomogeneities’:

<세미나>

매주 월요일: 10:00 - 12:00, at ASTC 610

Intensive Seminar 주제: Principal component analysis를 이용한 spectrosocpy 분석. Derivation of potential jump and normal derivative jump across thin inhomogeneities

메주 화요일 10:00 - 12:00, at ASTC 610

Intensive Seminar 주제: Anisotropic admittivity anomaly detection using electrical impedance spectroscopic imaging system

메주 수요일 (W) 10:00 - 12:00, at ASTC 610

Intensive Seminar 주제: Change of effective conductivity of fabric due to pressure / Homogenization

매주 목요일: 2015/07/16 (T) 10:00 - 12:00, at ASTC 610

Intensive Seminar 주제: Functional magnetic resonance electrical impedance tomography

매주 금요일: 10:00 - 12:00, at ASTC 610

Intensive Seminar 주제: 전기 임피던스를 이용한 심폐기능 모니터링, principle component analysis

2015.06.28

Meet with Sun Xiang and contact to Prof. Jung-Il Choi

2015.06.29

Give a seminar related to Hybrid scheme for hyperbolic conservation laws to Yonsei CSE Students.

Title: Hybrid FC Method and WENO Finite Difference Scheme for Hyperbolic Conservation Laws in a Single-Domain Framework

- In this talk, we introduce a hybrid Fourier-Continuation (FC) method and fifth order characteristicwise WENO finite difference scheme for solving system of hyperbolic conservation laws on a uniformly discretized Cartesian domain.

The smoothness of the solution is measured by the high order multi-resolution algorithm (MR) by Harten at each grid point in a single-domain framework, as opposed to each subdomain in a multi-domain framework. The Hybrid scheme conjugates a high order shock-capturing WENO-Z5 scheme in non-smooth WENO stencils with an essentially non-dissipative and non-dispersive FC in smooth FC stencils, yielding a high fidelity scheme for applications containing both discontinuous and complex smooth structures. The accuracy and efficiency of the Hybrid scheme in solving one- and two-dimensional system of hyperbolic conservation laws is demonstrated with several classical examples of shocked flow. For a sufficiently large problem size, a factor of almost two has been observed in the speedup of the Hybrid scheme over the WENO-Z5 scheme.

This is a joint work with Peng Li (Beijing Institute of Technology), Wai Sun Don (Ocean University of China & Brown University) and Shusen Xie (Ocean University of China).

2015.06.30

Discussion with Prof. Jung-Il Choi and his students for future collaborations on UQ analysis in CFD

- Discussing some basic ideas of UQ analysis and planning to have a collaboration on Radiation hydrodynamics problem.

- 산업계에서 쓰이는 고속 수치 알고리즘의 현황

- decomposition method,

- multigrid method 응용

- plasma physics에서의 수치계산

- poisson equations, monte carlo computing

- particle in cell computation

I gave some lecture for a group of graduate students. The purpose was to explain in an elementary way the compactness and monotonicity techniques for nonlinear elliptic equations.

Collaboration with CSE professor (10days)

2015.06.22, 23, 24, 25, 26, 29, 30

2015.07.01, 02, 03 (work 10hours per day; from 9am to 7pm)

I am preparing articles with professor Seo and one of his students. The theme from the point of view of applications regards fabric structure. From a mathematical point of view it concerns an elliptic system with periodic coefficients in a domain growing to infinity. A model problem can also be considered. It deals with only one equation that carries the difficulties of the system. Even if the data are periodic it is easy to see that, due to the boundary conditions, the limit solution when the size of the domain expends to infinity cannot be periodic. However, at the limit, the gradient of the solution is periodic. This is a remarkable property that we were able to demonstrate using sophisticated arguments. Also the convergence of the solution when the periodical domain goes to infinity was established.

With professor Jung-il Choi we are considering different boundary conditions at finite distance for the flow of an incompressible fluid in an infinite outlet. The importance of such a condition lies in the fact that it allows stable and accurate computations in a bounded part of the domain at stake.

서진근교수가 주최한 "Medical Image Computing: Challenging Issue and Future direction"워크샵 참가 발표 및 연구관련 토의

서진근교수가 주최한 "Medical Image Computing: Challenging Issue and Future direction"워크샵 참가 발표 및 연구관련 토의

서진근교수가 주최한 "Medical Image Computing: Challenging Issue and Future direction"워크샵 참가 발표 및 연구관련 토의

spectral method 소개: systematical presentation of basic convergence theory and error analysis for spectral methods 외