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- Seung-Yeon Kim, Sang Bub Lee, Jooyoung Lee
- Physical review. E, Statistical, nonlinear, and…
- 2005

The optimization results by conformational space annealing are presented for an off-lattice protein model consisting of hydrophobic and hydrophilic residues in Fibonacci sequences. The ground-state energies found are lower than those reported in the literature. In addition, the ground-state conformations in three dimensions exhibit the important aspect of… (More)

- Sang Bub Lee
- 2001

We devise a new algorithm to obtain the pair-connectedness function Per) for continuum-percolation models from computer simulations. It is shown to converge rapidly to the infinite-system limit, even near the percolation threshold, thus providing accurate estimates of Per) for a wide range of densities. We specifically consider an interpenetrable-particle… (More)

- S Torquato, Sang Bub Lee
- 1990

One of the fundamental quantities which statistically characterizes a random system of interacting particles is the nearest-neighbor distribution function. We present computer-simulation results for two different types of nearest-neighbor distribution functions for random distributions of identical impenetrable (hard) spheres. We also report, for such… (More)

- Sang B Lee, Sang-Gui Lee
- Physical review. E, Statistical, nonlinear, and…
- 2008

The two scaling relations in absorbing phase transitions, nu_||=beta/theta and z=nu_||/nu_(perpendicular), are studied for a conserved lattice gas model. The critical indices calculated elaborately from the all-sample average density of active particles appear to satisfy both relations. However, the exponent nu_(perpendicular) calculated from the surviving… (More)

- Sang-Gui Lee, Sang Bub Lee
- Physical review. E, Statistical, nonlinear, and…
- 2009

The deterministic conserved threshold transfer process, which is a variant of the conserved threshold transfer process modified in a way as that hopping of a particle is to be deterministic, is proposed. The critical behavior of the model is investigated in one, two, and four dimensions. It is found that the order parameter yields a discontinuous… (More)

- Sang Bub Lee
- 2001

Computer-simulation results are reported for the porosity of a model of two-phase random media composed of identical D-dimensional spheres (D = 2 or 3) distributed with an arbitrary degree of impenetrability A., 0<,1 < 1; A. = 0 corresponding to randomly centered or "fully penetrable" particles and A. = 1 corresponding to totally impenetrable particles. We… (More)

- Sang Bub Lee
- Physical review. E, Statistical, nonlinear, and…
- 2015

The absorbing phase transition of the modified conserved lattice gas (m-CLG) model was investigated in one dimension. The m-CLG model was modified from the conserved lattice gas (CLG) model in such a way that each active particle hops to one of the nearest-neighbor and next-nearest-neighbor empty sites. The order parameter exponent, the dynamic exponent,… (More)

- Sang B Lee
- Physical review. E, Statistical, nonlinear, and…
- 2003

We discuss the logarithmic scaling of the nucleation density for pulsed laser deposition, discovered recently by Hinnemann et al. [Phys. Rev. Lett. 87, 135701 (2001)] in two dimensions. The logarithmic scaling is often observed in the upper critical dimension. We find that the nucleation density in one dimension also exhibits logarithmic scaling, implying… (More)

- Sang B Lee, Yun Nam Kim
- Physical review. E, Statistical, nonlinear, and…
- 2007

We study the continuous phase transition of the conserved lattice gas (CLG) model from an active phase into an absorbing phase on two fractal lattices, i.e., on a checkerboard fractal and on a Sierpinski gasket. In the CLG model, a particle is assumed to be active if any of the neighboring sites are occupied by a particle and inactive if all neighboring… (More)

- Sang-Gui Lee, Sang B Lee
- Physical review. E, Statistical, nonlinear, and…
- 2008

The universality split in absorbing phase transition between the conserved lattice gas (CLG) model and the conserved threshold transfer process (CTTP) is investigated on a checkerboard fractal and on a Sierpinski gasket. The critical exponents theta, beta, nu||, and z, which are associated with, respectively, the density of active particles in time, the… (More)