@inproceedings {antoniospp2010, title = {Characterization of an Ising-Like SI model}, booktitle = {Proceedings of the 28th Samahang Pisika ng Pilipinas Physics Congress}, year = {2010}, month = {25{\textendash}27 Oct 2010}, pages = {SPP-2010-003}, address = {Meralco Management and Leadership Development Center, Antipolo City}, abstract = {
An Ising-like system was used to model a computer network through which malware is spreading. The rate of spread of infection was estimated by fitting the infection curves with a standard logistic model and an exponential model. Graphical analysis shows that the exponential decay model fit the infection curves better than the logisitic model. Trends in the residuals suggest that current mathematical models for epidemics are not consistent with the system.
}, author = {Kristine Eia S Antonio and Ronald S. Banzon} } @inproceedings {antonio-spp-2009, title = {Selecting a practical successive over relaxation parameter for a particle-in-cell method}, booktitle = {Proceedings of the 27th Samahang Pisika ng Pilipinas Physics Congress}, year = {2009}, month = {28{\textendash}30 Oct 2009}, pages = {SPP-2009-156}, address = {Development Academy of the Philippines Convention Center, Tagaytay City}, abstract = {
The rate of convergence of the Successive Over-Relaxation (SOR) method depends on the choice of SOR Parameter,\ ω. It is shown\ that the SOR method as a Poisson Solver in the Particle-in-Cell (PIC), has a practical SOR parameter,\ ωp, that is independent\ of the number of particles contained by the system. A method that speeds up the selection of this\ ωp\ is proposed.\ For a 16x16 Plasma PIC system, using 7 test points and an increment of s = 0.03215, the\ ωp\ selected by the method is\ 1.71 which is equal to the\ ωp\ determined from a parameter scan.
}, author = {Kristine Eia S Antonio and Ronald S. Banzon} } @inproceedings {antonio-spp-2007, title = {Parameter estimates for a reaction rate model}, booktitle = {Proceedings of the 25th Samahang Pisika ng Pilipinas Physics Congress}, year = {2007}, month = {24{\textendash}26 Oct 2007}, pages = {SPP-2007-101}, address = {University of the Phlippines Los Ba{\~n}os, Laguna}, abstract = {
A model for chemical reaction rates that relies solely on the depth of any potential-well function and two parameters intrinsic to the model, A and f, was previously proposed. This study aims to show that using that model, the experimental reaction rate constant can be replicated by simply scaling these two parameters and choosing the proper period to calculate the rate constant, k. It was shown that k is best calculated for the period t4-t2 and for A = 0.01 and f = 0.25 where the \% error is 1.38\%.
}, author = {Kristine Eia S Antonio and Ronald S. Banzon} } @inproceedings {belisario-spp-2006, title = {The molecular dynamics of two particles on a ring}, booktitle = {Proceedings of the 24th Samahang Pisika ng Pilipinas Physics Congress}, year = {2006}, month = {25{\textendash}27 Oct 2006}, pages = {SPP-2006-68}, address = {Ateneo de Davao University, Davao City}, abstract = {
We consider the behavior of two particles on a one-dimensional ring interacting via the Lennard-Jones potential. A collision occurs when the distance between the particles falls within a range corresponding to the minimum potential energy of the system. Equilibrium is achieved when the kinetic energy, which is reduced to an amount proportional to the square of the velocity during particle-particle collision, is less than a fraction of the minimum potential energy. The model shows that as we increase the range in which the Lennard Jones potential is allowed to act on the system, the time needed to achieve equilibrium also increases.
}, author = {Karla V Belisario and Elise Agra and Kristine Eia S Antonio and Ronald S. Banzon} } @inproceedings {antonio-spp-2006, title = {Particle density dependence of molecular dynamics estimated reaction rates}, booktitle = {Proceedings of the 24th Samahang Pisika ng Pilipinas Physics Congress}, year = {2006}, month = {25{\textendash}27 Oct 2006}, pages = {SPP-2006-72}, address = {Ateneo de Davao University, Davao City}, abstract = {
The dependence of the rate of reaction on the particle density of a one-dimensional gaseous system was investigated using molecular dynamics. The particle density in the system was changed by changing the size of the particles, the length of the system, and the number of particles in the system. It was found that, in general, as particle density increased, the rate of the reaction for a system that forms diatomic molecules increased. It was also shown that as the initial kinetic energy of the particles as denoted by the speed was increased, the rate of the reaction increased as well. These findings agree with empirical observations.
}, author = {Kristine Eia S Antonio and Ronald Banzon} } @inproceedings {antonio-spp-2005, title = {A model for molecular reaction rates}, booktitle = {Proceedings of the 23rd Samahang Pisika ng Pilipinas Physics Congress}, year = {2005}, month = {26{\textendash}28 Oct 2005}, pages = {SPP-2005-121}, address = {Central Philippine University, Iloilo City}, abstract = {
We propose a model for the determination of the rate of a chemical reaction using molecular dynamics. This is done by approximating the molecules to be hard spheres interacting via the Lennard-Jones potential. A collision occurs in the event that the particle separation falls within a predetermined collision range. Equilibrium is achieved by reducing the kinetic energy by an amount proportional to the square of the velocity, -Av^2, during particle-particle collision. The model shows that as A\ increases, the time to equilbrium, T, decreases exponentially. On the other hand, it also shows that for increasing particle radius R, T\ increases linearly.
}, author = {Kristine Eia S Antonio and Karla V Belisario and Ronald S. Banzon} }