My research area is computational physics and computational science technology (especially developing new scientific algorithms such as first-passage and last-passage algorithms). My research interests include Monte Carlo methods for materials science, especially the bulk properties of porous and composite media such as the electrical or thermal conductivity or shear modulus of structural composites; the permeability of porous media; the electrostatic contribution to the free energy of a bio-molecule in solution; and the mutual capacitance matrix describing interaction of micro-components in a transistor matrix on a microchip.
In addition, I am very interested in molecular dynamics for ion implantation, kinetic Monte Carlo methods for dopant diffusion during thermal annealing after ion implantation into crystalline materials and ab initio quantum mechanical calculations for diffusion parameters of defects in solids by using the Vienna Ab-initio Pachage Simulation (VASP) and transition state theory tools. Also, I am interested in distributed computing, numerical analysis, solving partial differential equations with random walk, pseudorandom number generation, quasirandom number generation, ?quasi-Monte Carlo methods, first-passage algorithms and last-passage algorithms. This last-passage method stems from the consideration of the isomorphism between the electrostatic potential and the probability of going to infinity without touching a conducting object at a certain distance from the conductor. Recently, I am doing research on Ising models with Wang-Landau sampling method.
EDUCATION
1999 University of Southern Mississippi (Ph.D.-Scientific Computing)
1996 University of Southern Mississippi (M.S.-(Computational) Physics)
1991 Seoul National University (M.S.-Astronomy (Cosmology)
1988 Seoul National University (B.S.-Astronomy)
WORK EXPERIENCE
2018.9-2019.8 University of Washington at Seattle, Department of Electrical Engineering with Professor Dunham, Visiting Scholar
2013-Present Professor, Joint appointment with Department of Physics and Photon Science
2010-Present GIST, GIST College, Division of Liberal Arts and Sciences, Professor
2013-2016 Associate Professor, Joint appointment with Department of Physics and Photon Science
2010-2016 GIST, GIST College, Division of Liberal Arts and Sciences, Associate Professor
2006-2009 National Institute for Mathematical Sciences, Daejeon, Senior Researcher
2005-2006 Soongsil University, Computer-Aided Molecular Design Research Center, Seoul, Research Professor
2003-2005 Inha University, Computational Electronics Center, Incheon, Visiting Professor
2002-2003 Hanyang University, Innovative Technology for Radiative Transfer Technology Center, Seoul, Research Professor
1999-2002 Florida State University, Tallahassee, FL, USA, Postdoctoral Researcher
HONORS_AWARDS
C.-O. Hwang, Youngmin Ko, Mingyo Kim and Jiseop Lim, "Comment on 'Radial dependence of induced current density and small pixel effect in parallel-plate detectors'“ , accepted for publication in IEEE Transaction on Nuclear Science.
W. Kwak, Sanghyun Kim, and C.-O. Hwang, "Phase Transitions of 2D Triangular Antiferromagnetic Ising Model in a Uniform Magnetic Field near h=0 and T=0," Journal of Physics: Conference Series, 750, 012012, pp1-5, 2016.
C.-O. Hwang, S. Park and W. Kwak, "Study of the Antiferromagnetic Blume-Capel Model on kagome Lattice," Journal of Physics: Conference Series, 750, 012016, pp1-4, 2016.
C.-O. Hwang, Sungpyo Hong and Jinwoo Kim, "Off-centered "Walk-on-Spheres" (WOS) Algorithm," Journal of Computational Physics , 303, pp331-335 (Dec. 15, 2015) 황치옥, “과학과 종교의 시간과 공간 ”, 생각의 힘 시리즈 소책자(2014 년 9 월 30 일 )
C.-O. Hwang, S.-Y. Kim, " Field-induced Kosterlitz-Thouless Transition in Critical Triangular-lattice Antiferromagnets," Monte Carlo Methods and Applications, 20(3), pp217-221 (2014).
W.-J. Sim, Y.-W Kim, C.-O. Hwang, "A Study on the Network Landscape of Korean Folktails," Journal of Korean Oral Literature, 37, pp73-105 (Dec., 2013).
C.-O. Hwang, "Solving Partial Differential Equations via Random Walks: A Review," Statistical Mechanics and Random Walks, A. Skogseid and C. Fasano, editors, Nova Science Publishers, Inc., pp433-442 (2012).
S.-Y. Ha, T. Ha, C.-O. Hwang, and H. Lee, “Nonlinear Instability of the One-Dimensional Vlasov-Yukawa System,” Journal of Mathematical Physics, 52, 033301 pp.1 23, (2 Mar., 2011).
C.-O. Hwang and S.-Y. Kim, “Yang-Lee Zeros of the Triangular Ising Antiferromagnets,” Physica A:Statistical Mechanics and its Applications, 389, pp5650-5654, (2010).
C.-O. Hwang, M. Mascagni and T. Won, “Monte Carlo Methods for Computing the Capacitance of the Unit Cube: A Review,” in Mathematics and Computers in Simulation, 80, pp.1089 1095, (2010).
C.-O. Hwang, “Six-state clock model on the square lattice: Fisher zero approach with Wang-Landau sampling,” in Physical Reveiw E, 35(9), pp.714 718, (Aug. 2009).
J.H. Yoo, C.-O. Hwang and T. Won, “Minimized Atomistic Model (MAM) and Main Evolution Path for Dominant BmIn Clusters in Boron Diffusion,” Molecular Simulation, 35(9), pp.714 718, (Aug. 2009).
S.-Y. Kim, C.-O. Hwang and J. M. Kim, “Partition Function Zeros of the Antiferromagnetic Ising Model on Triangular Lattice in the Complex Temperature Plane for Nonzero Magnetic Field,” Nuclear Physics B, 805, pp441 450, (June, 2008).
C.-O. Hwang, S.-Y. Kim, D. Kang and J. M. Kim, “Thermodynamic Properties of the Triangular-Lattice Ising Antiferromagnet in a Uniform Magnetic Field,” Journal of the Korean Physical Society, S203-S208, (Feb., 2008).
K.-S. Yoon, C.-O. Hwang, and T. Won, “Determination of the KMC Parameters for Indium Diffusion in Silicon Substrates via an Ab-Initio Calculation,” Journal of the Korean Physical Society, 50(6), pp1651-1655, (June 2007).
C.-O. Hwang, S.-Y. Kim, D. Kang and J. M. Kim, “Ising Antiferromagnets in a Nonzero Uniform Magnetic Field,” Journal of Statistical Mechanics: theory and experiment, L05001:1 8, (May, 2007).
C.-O. Hwang, “Self-Diffusion Constants in Silicon: Ab Initio Calculations in Combination with Classical Rate Theory,” Journal of Chemical Physics, 125, pp226101-1 3, (Dec. 14, 2006).
C.-O. Hwang and J. A. Given, “Last-Passage Monte Carlo Algorithm for Mutual Capacitance,” Physical Review E, 74, 027701, (Aug. 2006).
K.-S. Yoon, C.-O. Hwang, J.-H. Yoo and T. Won, “First-Principles Investigation of Indium Diffusion in a Silicon Substrate,” Journal of the Korean Physical Society, 48, pp535-539, (Apr. 2006).
C.-O. Hwang and T. Won, “Last-passage Algorithms for Corner Charge Singularity of Conductors,” Journal of the Korean Physical Society, 47, ppS464-S466, (Nov. 2005).
J.-H. Yoo, C.-O. Hwang, B.-J. Kim and T.-Y. Won, “Simple Atomistic Modeling of Dominant BmIn Clusters in Boron Diffusion,” Molecular Simulation, 31, pp817-824, (Oct. 15, 2005).
C.-O. Hwang and T. Won, “Edge Charge Singularity of Conductors,” Journal of the Korean Physical Society, 45, ppS551-S553, (Dec. 2004).
C.-O. Hwang and M. Mascagni, “Electrical Capacitance of the Unit Cube,” Journal of Applied Physics, 95(7), pp3798-3802, (April 1, 2004).
C.-O. Hwang, “Extrapolation Technique in the “Walk on Spheres” Method for the Capacitance of the Unit Cube,” Journal of the Korean Physical Society, 44(2), pp469-470, (Feb. 2004).
C.-O. Hwang and M. Mascagni, “Analysis and Comparison of Green’s Function First-Passage Algorithms with “Walk on Spheres” Algorithms,” Mathematics and Computers in Simulation, 63(6), pp605-613, (Nov. 24, 2003).
J. A. Given and C.-O. Hwang, “Edge Distribution Method for Solving Elliptic Boundary Value Problems with Singular Boundaries,” Physical Review E, 68, 046128(1-6), (Oct. 27, 2003).
M. Mascagni and C.-O. Hwang, “ϵ-Shell Error Analysis in “Walk On Spheres” Algorithms,” Mathematics and Computers in Simulation, 63(2), pp93-104, (May, 2003).
C.-O. Hwang, M. Mascagni and J. A. Given, “A Feynman-Kac Path-Integral Implementation for Poisson’s Equation Using an h-conditioned Green’s Function,” Mathematics and Computers in Simulation, 62(3-56), pp347-355, (Mar. 3, 2003).
C.-O. Hwang, M. Mascagni and J. A. Given, “A Feynman-Kac Path-Integral Implementation for Poisson’s Equation Using an h-conditioned Green’s Function,” Mathematics and Computers in Simulation, 62(3-56), pp347-355, (Mar. 3, 2003).
C.-O. Hwang and M. Mascagni, “Capacitance of the Unit Cube,” Journal of the Korean Physical Society, 42, L1-L4 (January 15, 2003).
J. A. Given, C.-O. Hwang and M. Mascagni, “First- and Last-Passage Monte Carlo Algorithms for the Charge Density Distribution on a Conducting Surface,” Physical Review E, 66, 056704(1-8), (Nov. 22, 2002).
C.-O. Hwang, J. A. Given and M. Mascagni, “The Simulation-Tabulation Method for Classical Diffusion Monte Carlo,” Journal of Computational Physics, 174(2), 925-946 (December 10, 2001).
J. A. Given, M. Mascagni and C.-O. Hwang, “Continuous Path Brownian Trajectories for Diffusion Monte Carlo Via First- and Last-Passage Distributions,” Lecture Notes in Computer Science, 2179, 46-57 (June 6-10, 2001).
C.-O. Hwang and M. Mascagni, “A Feynman-Kac Path-Integral Implementation for Poisson’s Equation,” Lecture Notes in Computer Science, 2073, 1282-1288 (May 2001).
C.-O. Hwang, J. A. Given and M. Mascagni, “Rapid Diffusion Monte Carlo Algorithms for Fluid Dynamic Permeability,” Monte Carlo Methods and Applications, 7(3-4), 213-222 (2001).
C.-O. Hwang and M. Mascagni, “Efficient Modified “Walk On Spheres” Algorithm for the Linearized Poisson-Boltzmann Equation,” Applied Physics Letters, 78(6), 787-789 (Feburary 5, 2001).
C.-O. Hwang, James A. Given and Michael Mascagni, “On the Rapid Estimation of Permeability for Porous Media Using Brownian Motion Paths,” Physics of Fluids, 12(7), 1699-1709 (July 2000).
TEACHING
Single Variable Calculus and Applications
Multivariable Calculus and Applications
Introduction to Linear Algebra and Application
Differential Equations and Applications
Monte Carlo Methods and their Applications
Scientific Computing
Scientific Programming
DETAILED_MAJOR
Scientific Computing (Monte Carlo methods and their applications)
