A cross-platform public domain PC image-analysis program for the comet assay.
- Krzysztof Końca, A. Lankoff, A. Wójcik
- BiologyMutation research
- 10 January 2003
Tortuosity-porosity relation in porous media flow.
- M. Matyka, A. Khalili, Z. Koza
- PhysicsPhysical review. E, Statistical, nonlinear, and…
- 22 January 2008
It is demonstrated that the finite-size, slow relaxation and discretization errors, which were ignored in previous studies, may cause significant underestimation of tortuosity.
Hydraulic tortuosity in arbitrary porous media flow.
An alternative method is proposed, which enables one to calculate T directly from the fluid velocity field, without the need of determining streamlines, which greatly simplifies determination of tortuosity in complex geometries, including those found in experiments or three-dimensional computer models.
Compressed Multirow Storage Format for Sparse Matrices on Graphics Processing Units
- Z. Koza, M. Matyka, Sebastian Szkoda, L. Miroslaw
- Computer ScienceSIAM Journal on Scientific Computing
- 13 March 2012
A new format for storing sparse matrices for efficient sparse matrix-vector (SpMV) product calculation on modern graphics processing units (GPUs) is proposed and the speedup of up to 60% over the best of the five alternative kernels is found.
General technique of calculating the drift velocity and diffusion coefficient in arbitrary periodic systems
- Z. Koza
- Mathematics
- 14 September 1999
We develop a practical method of computing the stationary drift velocity V and the diffusion coefficient D of a particle (or a few particles) in a periodic system with arbitrary transition rates. We…
The long-time behavior of initially separated A+B→0 reaction-diffusion systems with arbitrary diffusion constants
- Z. Koza
- Mathematics
- 18 January 1996
We examine the long-time behavior of A+B→0 reaction-diffusion systems with initially segregated species A and B. All of our analysis is carried out for arbitrary (positive) values of the diffusion…
FociCounter: a freely available PC programme for quantitative and qualitative analysis of gamma-H2AX foci.
- A. Jucha, Aneta Węgierek-Ciuk, A. Lankoff
- BiologyMutation research
- 1 February 2010
Wall Orientation and Shear Stress in the Lattice Boltzmann Model
- M. Matyka, Z. Koza, L. Miroslaw
- Engineering
- 14 March 2012
Power-exponential velocity distributions in disordered porous media.
- M. Matyka, J. Gołembiewski, Z. Koza
- PhysicsPhysical Review E
- 16 September 2015
It is found that γ has a universal value 1/2 at the percolation threshold and grows with the porosity, but never exceeds 2.0, suggesting that all distributions follow the power-exponential law controlled by an exponent γ and a shift parameter u_{0}.
From discrete to continuous percolation in dimensions 3 to 7
The convergence of a discrete model to its continuous limit is controlled by a power-law dependency with a universal exponent θ=3/2, which allows us to estimate the continuous percolation thresholds in a model of aligned hypercubes in dimensions d=3,…,7 with accuracy far better than that attained using any other method before.
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