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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)
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)
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)
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)
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)
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
  • 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
  • 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)
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)
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)