Publications

S.A. Estavillo, E. Vallar, M.C. Galvez, P.M. Ong, R.C. Batac, A Complexity View of Atmospheric Particulate Matter Concentration, International Journal of Modern Physics C, (2024). DOI:10.1142/S0129183124502231

P.B. Sy and R.C. Batac, The role of intervention mechanisms on a self-organized system: Dynamics of a sandpile with site reinforcement, Journal of Physics: Complexity, 5, 015012, DOI:10.1088/2632-072X/ad28ff (2024).

J.M.V. Antenorcruz and R.C. Batac, Efficiency of a self-organizing Ising model of financial markets, International Journal of Modern Physics C, 35(01), 2450013, DOI:10.1142/S012918312450013X (2024).

M.T. Cirunay and R.C. Batac, Evolution of the periphery of a self-organized road network, Physica A: Statistical Mechanics and its Applications 617, 128629, DOI:10.1016/j.physica.2023.128629 (2023).

M.T. Cirunay and R.C. Batac, Morphological and Fractal Characteristics of City Road Networks from Philippine Metropolitan Regions, Journal of Regional and City Planning 33(3), 386-404, DOI: 10.5614/jpwk.2022.33.3.6 (2022).

R.C. Batac and M.T. Cirunay, Shortest paths along urban road network peripheries, Physica A: Statistical Mechanics and its Applications 597, 127255, DOI:10.1016/j.physa.2022.127255 (2022).

D.M.T. Ordoñez and R.C. Batac, Cascade events in geographical space, International Journal of Modern Physics C, 33(4), 2250050, DOI:10.1142/S0129183122500504 (2022).

M.T. Cirunay and R.C. Batac, Spatial Signatures of Road Network Growth for Different Levels of Global Planning, Complex Systems 30(3), 273-296, DOI:10.25088/ComplexSystems.30.3.273 (2021).

R. C. Batac, Clustering regimes in a sandpile with targeted triggering, EPL (Europhysics Letters) 135, 19003, DOI:10.1209/0295-5075/135/19003  (2021).

C.D. Perlada, A.K. Orden II, M.T. Cirunay, and R.C. Batac, Quantifying the organization of urban elements through the statistical distributions of their spatial spreading metrics, Physica A 568, 125717, DOI:10.1016/j.physa.2020.125717 (2021). 

J.M.V. Antenorcruz, M.C.F. Manzano, and R.C. Batac, Ranking the market efficiency of the Philippine stock exchange industry sectors using the multifractal detrended fluctuation analysis, Journal of Physics: Conference Series 1593, 012018, DOI:10.1088/1742-6596/1593/1/012018 (2020). 

M.T. Cirunay, M.N. Soriano, and R.C. Batac, Preserved layout features embedded in road network development, Journal of Physics: Complexity 1(1), 015004, DOI:10.1088/2632-072X/ab7f4e (2020).

D.C.Biton, A.B. Tarun, and R.C. Batac, Comparing spatio-temporal networks of intermittent avalanche events: Experiment, model, and empirical data, Chaos, Solitons & Fractals 130, 109519, DOI:10.1016/j.chaos.2019.109519 (2020). 

D.C. Biton and R.C. Batac, Comparing the sandpile model with targeted triggering and the Olami-Feder-Christensen model as models of seismicity using recurrence network analysis, Journal of Physics: Conference Series 1298, 012007, DOI:10.1088/1742-6596/1298/1/012007 (2019). 

C.D. Perlada and R.C. Batac, Fat Tailed Distributions of the Spatial Metrics of Urban Organization of Metro Manila, Philippines, International Journal of Structural and Civil Engineering Research 8(4), 398-402, DOI: 10.18178/ijscer.8.4.398-402 (2019). 

M. T. Cirunay, M. N. Soriano, and R. C. Batac, Analysis of the Road Network Evolution through Geographical Information Extracted from Historical Maps: A Case Study of Manila, Philippines, Journal of Advances in Information Technology 10(3), 114-118, DOI:10.12720/jait.10.3.114-118 (2019). 

M.T. Cirunay and R.C. Batac, Statistical signatures of the spatial imprints of road network growth, International Journal of Modern Physics C 29(10), 1850099, DOI:10.1142/S0129183118500997 (2018).

C.C.David, S.L.C.Monterola, A.A. Paguirigan Jr., E.F.T. Legara, A.B.Tarun, R.C.Batac, and J.P. Osorio, School hazard vulnerability and student learning, International Journal of Educational Research 92, 20-29, DOI:10.1016/j.ijer.2018.07.005 (2018). 

C.D. Janer, D.C. Biton, and R.C. Batac, Incorporating space, time, and magnitude measures in a network characterization of earthquake events, Acta Geophysica 65(6), 1153-1166, DOI:10.1007/s11600-017-0100-3 (2017).

R.C. Batac, A.A. Paguirigan Jr., A.B. Tarun, and A.G. Longjas, Sandpile-based model for capturing magnitude distributions and spatiotemporal clustering and separation in regional earthquakes, Nonlin. Processes Geophys. 24(2), 179-187, DOI:10.5194/npg-24-179-2017 (2017).

R.C. Batac, Statistical Properties of the Immediate Aftershocks of the 15 October 2013 Magnitude 7.1 Earthquake in Bohol, Philippines, Acta Geophysica 64(1), 15-25, DOI:10.1515/acgeo-2015-0054 (2016). 

A.B.Tarun, A.A. Paguirigan Jr., and R.C.Batac, Spatiotemporal recurrences of sandpile avalanches, Physica A 436, 293-300, DOI:10.1016/j.physa.2015.05.016 (2015).

A.A. Paguirigan Jr., C.P. Monterola, and R.C.Batac, Loss of criticality in the avalanche statistics of sandpiles with dissipative sites, Commun. Nonlin. Sci. Numer. Simulat. 20(3), 785-793, DOI:10.1016/j.cnsns.2014.06.020 (2015).

R. C. Batac and H. Kantz, Observing spatio-temporal clustering and separation using interevent distributions of regional earthquakes, Nonlin. Processes Geophys. 21, 735-744, DOI:10.5194/npg-21-735-2014 (2014).

R.C. Batac, A.G. Longjas, and C.P. Monterola, Statistical distributions of avalanche size and waiting times in an inter-sandpile cascade model, Physica A 391(3), 616-624, DOI:10.1016/j.physa.2011.08.032 (2012).

I. Crisologo, R.C. Batac, A.G. Longjas, E.F.T. Legara, and C.P. Monterola, Visual and auditory cues significantly reduce human’s intrinsic biases when tasked to generate a random number sequence, Int. J. Mod. Phys. C 21(5), 567, DOI:10.1142/S0129183110015324 (2010).

C.P. Monterola, I. Crisologo, J. Tugaff, R.C. Batac, and A.G. Longjas, Surface morphology of chalkboard tips captures the uniqueness of the user’s hand strokes, Int. J. Mod. Phys. C 21(4), 535, DOI:10.1142/S0129183110015294 (2010).

R.C. Batac, M.G. Pastor, M.E. Arciaga, J.Y. Bantang, and C.P. Monterola, Kinks, logarithmic tails, and super-stability in bi-disperse granular media, Physica A 388(15), 3072-3082, DOI:10.1016/j.physa.2009.04.001 (2009).

M.E. Arciaga, M.G. Pastor, R.C. Batac, J.Y. Bantang, and C.P. Monterola, Experimental observation and an empirical model of enhanced heap stability resulting from the mixing of granular materials, J. Stat. Mech. Theor. Expt. 2009, P07040, DOI:10.1088/1742-5468/2009/07/P07040 (2009).

E.F.T. Legara, A.G. Longjas, and R.C. Batac, Competition in a social structure, Int. J. Mod. Phys. C 20(1), 1, DOI:10.1142/S0129183109013406 (2009).

D.E. Juanico, A.G. Longjas, R.C. Batac, and C.P. Monterola, Avalanche statistics of driven granular slides in a miniature mound, Geophys. Res. Lett. 35(19), L19403, DOI:10.1029/2008GL035567 (2008).

M.T. Cirunay and R.C. Batac, Shapes of Road-Bounded Blocks as Indicators of Degree of Urbanization, in Argyrakis Panos. (2020). CCS2020 - Conference on Complex System 2020 - Book of Abstracts. Presented at the Conference on Complex Systems 2020 (CCS2020), online: Zenodo.DOI:10.5281/zenodo.4419178, pp. 84.

J.M.V. Antenorcruz, M.C. Manzano and R.C. Batac, Ranking the market efficiency of the Philippine stock exchange industry sectors using the multifractal detrended fluctuation analysis, 10th International Conference on Applied Physics and Mathematics (Tokyo, Japan: 2020).

M.T. Cirunay, M.N. Soriano, and R.C. Batac, Invariant Properties in the Evolution of the Manila Road Network, Conference on Complex Systems 2019 (Singapore: 2019). 

D.C. Biton and R.C. Batac, Effects of Targeted Intervention on the Statistical Properties of the Sandpile Model, Conference on Complex Systems 2019 (Singapore: 2019). 

C.D. Perlada and R.C. Batac, Nearest-neighbo Separations of Economic and Administrative Buildings in a Self-Organized Urban Setting, Conference on Complex Systems 2019 (Singapore: 2019). 

M.T. Cirunay, R.C. Batac, and M.N. Soriano, Invariant statistical property throughout the road network evolution of Manila, Proceedings of the Samahang Pisika ng Pilipinas 37, SPP-2019-1F-05 (Tagbilaran City, Bohol, Philippines: 2019). URL: https://paperview.spp-online.org/proceedings/article/view/SPP-2019-1F-05.

C.D. Janer, J.Y. Bantang, and R.C. Batac, Robustness of the recurrence network analysis method with respect to data loss, Proceedings of the Samahang Pisika ng Pilipinas 37, SPP-2019-1F-03 (Tagbilaran City, Bohol, Philippines: 2019). URL: https://paperview.spp-online.org/proceedings/article/view/SPP-2019-1F-03.

M.S. Villamayor, R.C. Batac, and J.Y. Bantang, Cooperation levels of iterated Prisoner's dilemma game with punishing agents and strategy update processes, Proceedings of the Samahang Pisika ng Pilipinas 37, SPP-2019-2F-06 (Tagbilaran City, Bohol, Philippines: 2019). URL: https://paperview.spp-online.org/proceedings/article/view/SPP-2019-2F-06.

M.T. Cirunay, M.N. Soriano, and R.C. Batac, Analysis of the road network evolution through geographical information extracted from historical maps: A case study of Manila, Philippines, 9th International Conference on Applied Physics and Mathematics (Bangkok, Thailand: 2019). 

D.C. Biton and R.C. Batac, Comparing the sandpile model with targeted triggering and the Olami-Feder-Christensen model as models of seismicity using recurrence network analysis, 9th International Conference on Applied Physics and Mathematics (Bangkok, Thailand: 2019). 

C.D. Perlada and R.C. Batac, Fat-tailed distributions of the spatial metrics of urban organization of Metro Manila, Philippines, 9th International Conference on Applied Physics and Mathematics (Bangkok, Thailand: 2019). Excellent Oral Presentation, ICAPM 2019.

M.T. Cirunay and R.C. Batac, Scaling of urban properties for Philippine cities, Proceedings of the Samahang Pisika ng Pilipinas 36, SPP-2018-PB-26 (2018). URL: https://paperview.spp-online.org/proceedings/article/view/SPP-2018-PB-26.

J. M.T. Abella and R.C. Batac, Social network analysis of the co-authorship network of the University of the Philippines Diliman from 1996 to 2016, Proceedings of the Samahang Pisika ng Pilipinas 36, SPP-2018-PB-39 (2018). URL: https://paperview.spp-online.org/proceedings/article/view/SPP-2018-PB-39.

D.C. Biton, C.D. Janer, and R.C. Batac, Statistical properties of avalanche in sandpile with targeted triggering and in granular pile set-up for earthquake modeling, Proceedings of the Samahang Pisika ng Pilipinas 36, SPP-2018-2G-06 (2018). URL: https://paperview.spp-online.org/proceedings/article/view/SPP-2018-2G-06.

A.K. Orden II and R.C. Batac, Characterizing spatial distributions of urban systems using Voronoi diagrams and L evy flights, Proceedings of the Samahang Pisika ng Pilipinas 36, SPP-2018-3D-03 (2018). URL: https://paperview.spp-online.org/proceedings/article/view/SPP-2018-3D-03.

C.D. Perlada and R.C. Batac, A quantitative analysis and growth model of urban spatial structures, Proceedings of the Samahang Pisika ng Pilipinas 36, SPP-2018-PB-29 (2018). URL: https://paperview.spp-online.org/proceedings/article/view/SPP-2018-PB-29.

J.A.Y. Asuncion and R.C. Batac, Universal statistics of fire sizes for different targeting schemes in a forest fire model, Proceedings of the Samahang Pisika ng Pilipinas 36, SPP-2018-PB-06 (2018). URL: https://paperview.spp-online.org/proceedings/article/view/SPP-2018-PB-06.

C.D. Janer and R.C. Batac, Quasi-static regimes in a continuously-rotated and slowly-grown granular setup, Proceedings of the Samahang Pisika ng Pilipinas 36, SPP-2018-PB-30 (2018). URL: https://paperview.spp-online.org/proceedings/article/view/SPP-2018-PB-30.

M.S. Villamayor and R.C. Batac, Emergence of cooperator dominance in an iterated prisoner's dilemma games with punishing agents and dynamic strategies, Proceedings of the Samahang Pisika ng Pilipinas 36, SPP-2018-PB-25 (2018). URL: https://paperview.spp-online.org/proceedings/article/view/SPP-2018-PB-25. Best Poster Award, 36th SPP Conference.

M.S. Villamayor and R.C. Batac, Quantifying the effects of punishing agents in a lattice-based prisoner's dilemma game, Proceedings of the Samahang Pisika ng Pilipinas 35, SPP-2017-PB-30 (2017). URL: https://paperview.spp-online.org/proceedings/article/view/95.

C.D. Janer and R.C. Batac, Incorporating space, time, and magnitude measures in a complex network of recurrent events, Proceedings of the Samahang Pisika ng Pilipinas 35, SPP-2017-PB-04 (2017). URL: https://paperview.spp-online.org/proceedings/article/view/43.

J.A.Y. Asuncion and R.C. Batac, Loss of self-organized criticality in a forest-fire model with targeted triggering, Proceedings of the Samahang Pisika ng Pilipinas 35, SPP-2017-PB-12 (2017). URL: https://paperview.spp-online.org/proceedings/article/view/63.

A.K. Orden II and R.C. Batac, Population redistribution within finite geographical locations using intersections of Voronoi layers, Proceedings of the Samahang Pisika ng Pilipinas 35, SPP-2017-PB-10 (2017). URL: https://paperview.spp-online.org/proceedings/article/view/47.

J.M.T. Abella and R.C. Batac, Temporal and social network analysis of the co-authorship networks from papers from the National Institute of Physics, Proceedings of the Samahang Pisika ng Pilipinas 35, SPP-2017-PB-35 (2017). URL:https://paperview.spp-online.org/proceedings/article/view/117.

C.D. Perlada and R.C. Batac, A model of urban growth based on the empirical spatial distribution of establishments in Metro Manila, Philippines, Proceedings of the Samahang Pisika ng Pilipinas 35, SPP-2017-PB-22 (2017). URL: https://paperview.spp-online.org/proceedings/article/view/68.

D.C. Biton and R.C. Batac, Spatial and temporal separation of recurrent avalanches in a slowly-driven one-sided granular pile, Proceedings of the Samahang Pisika ng Pilipinas 35, SPP-2017-PB-29 (2017). URL: https://paperview.spp-online.org/proceedings/article/view/106.

M.T. Cirunay and R.C. Batac, Modeling self-organized road network growth using nearest-neighbor routing rules with bearing, Proceedings of the Samahang Pisika ng Pilipinas 35, SPP-2017-1D-01 (2017). URL: https://paperview.spp-online.org/proceedings/article/view/18.

L.D.B. Banasig and R.C. Batac, Spatio-temporal analysis of the February 2017 Surigao earthquake and nearby events, Proceedings of the Samahang Pisika ng Pilipinas 35, SPP-2017-2D-01 (2017). URL: https://paperview.spp-online.org/proceedings/article/view/62.

M.T. Cirunay and R.C. Batac,. Spatial metrics for characterizing the urban road networks of cities with different levels of global planning, Proceedings of the Samahang Pisika ng Pilipinas 34, SPP-2016-1C-02 (2016). URL: https://paperview.spp-online.org/proceedings/article/view/286.

A.K. Orden II and R.C. Batac, Rapid population assessment using Voronoi polygons, Proceedings of the Samahang Pisika ng Pilipinas 34, SPP-2016-PB-03 (2016). URL: https://paperview.spp-online.org/proceedings/article/view/406.

J.M.T. Abella and R.C. Batac, Statistical properties of the co-authorship networks from papers from the National Institute of Physics, Proceedings of the Samahang Pisika ng Pilipinas 34, SPP-2016-4B-06 (2016). URL: https://paperview.spp-online.org/proceedings/article/view/336.

L.D.B. Banasig and R.C. Batac, Long-term memory in the temporal statistics and depletion of spatiotemporal clustering of Japanese and Southern Californian earthquake occurrences, Proceedings of the Samahang Pisika ng Pilipinas 34, SPP-2016-PB-02 (2016). URL: https://paperview.spp-online.org/proceedings/article/view/405. Best Poster Award, 34th SPP Conference.

C.D. Perlada, M.T. Cirunay, and R.C. Batac, Nearest-neighbor distributions of economic and administrative structures in capital cities of the Philippines, Proceedings of the Samahang Pisika ng Pilipinas 34, SPP-2016-PA-01 (2016). URL: https://paperview.spp-online.org/proceedings/article/view/362.

D.C. Biton, A.B. Tarun, and R.C. Batac, Statistics of void sizes and avalanche signatures in a slowly-driven open-sided granular pile, Proceedings of the Samahang Pisika ng Pilipinas 34, SPP-2016-4B-04 (2016). URL: https://paperview.spp-online.org/proceedings/article/view/334.

A.B. Tarun, A.A. Paguirigan Jr., and R.C. Batac, Spatiotemporal analysis of the recurrent avalanche events in the sandpile model, Proceedings of the Samahang Pisika ng Pilipinas 33, SPP-2015-4C-04 (2015). URL: https://paperview.spp-online.org/proceedings/article/view/1086.

M.T. Cirunay, A.A. Paguirigan Jr., and R.C. Batac, Determination of circularity distribution of Metropolitan Manila landscape, Proceedings of the Samahang Pisika ng Pilipinas 33, SPP-2015-PB-35 (2015). URL: https://paperview.spp-online.org/proceedings/article/view/1241.

R.C. Batac, C. David, A.A. Paguirigan Jr., and A.B. Tarun, Geographical nearest-neighbor networks of Philippine public schools, Proceedings of the Samahang Pisika ng Pilipinas 33, SPP-2015-1C-05 (2015). URL: https://paperview.spp-online.org/proceedings/article/view/1081.

A.B. Tarun and R.C. Batac, Network analysis of recurrent avalanche events in a 2D granular pile, Proceedings of the Samahang Pisika ng Pilipinas 32, SPP2014-5B-03 (2014). URL: https://paperview.spp-online.org/proceedings/article/view/1786.

R.C. Batac, A.A. Paguirigan Jr., and A.G. Longjas, Power-law magnitude distributions and spatio-temporal clustering and separation in a cellular automata model of earthquakes, Proceedings of the Samahang Pisika ng Pilipinas 32, SPP2014-2C-02 (2014). URL: https://paperview.spp-online.org/proceedings/article/view/1779.

A.M.C. Jayin, J.Y. Bantang, and R.C. Batac, Dual scaling properties of size and rank-frequency distributions in a model of alternating popularity growth and decay, Proceedings of the Samahang Pisika ng Pilipinas 31, SPP2013-PA-4 (2013). URL: https://paperview.spp-online.org/proceedings/article/view/SPP2013-PA-4.

A.B. Tarun, R.C. Batac, and J.Y. Bantang, Analysis of avalanche dynamics using color-coded layers of grains, Proceedings of the Samahang Pisika ng Pilipinas 31, SPP2013-2C-3 (2013). URL: https://paperview.spp-online.org/proceedings/article/view/SPP2013-2C-3.

A.M.C. Jayin, A.B. Tarun, R.C. Batac, E.F.T. Legara, and J.Y. Bantang, Popularity of personalities in society as driven by news, Proceedings of the Samahang Pisika ng Pilipinas 30, SPP2012-PA-4 (2012). URL: https://paperview.spp-online.org/proceedings/article/view/SPP2012-PA-4.

A. Tarun, A. M. Jayin, R.C. Batac, A. Longjas, and J. Bantang. Asymmetric collapse and two-dimensional spreading of a binary granular column, Proceedings of the Samahang Pisika ng Pilipinas 30, SPP2012-PA-6 (2012). URL: https://paperview.spp-online.org/proceedings/article/view/SPP2012-PA-6.

R.C. Batac and H. Kantz. Incorporating spatial properties in the statistical analysis of Philippine earthquakes, Proceedings of the Samahang Pisika ng Pilipinas 30, SPP2012-5C-4 (2012). URL: https://paperview.spp-online.org/proceedings/article/view/SPP2012-5C-4.

L. Buño, M.G. Pastor, R.C. Batac, J.Y. Bantang, and C.P. Monterola, Void statistics as deterministic tools in avalanche prediction, Proceedings of the Samahang Pisika ng Pilipinas 29, SPP2011-2A-3 (2011). URL: https://paperview.spp-online.org/proceedings/article/view/3080.

A.A. Paguirigan Jr., R.C. Batac, and C.P. Monterola, Effects of reinforcements on a sandpile model, Proceedings of the Samahang Pisika ng Pilipinas 29, SPP2011-2A-4 (2011). URL: https://paperview.spp-online.org/proceedings/article/view/3081.

R.C. Batac, A.G. Longjas, and C.P. Monterola, Relationship between size and waiting time distributions in the empirical data for natural hazards, Proceedings of the Samahang Pisika ng Pilipinas 29, SPP2011-3A-1 (2011). URL: https://paperview.spp-online.org/proceedings/article/view/3083.

B.E. Borja, C.P. Monterola, and R.C. Batac, A model of granular egress in a region with varying spatial constraint, Proceedings of the Samahang Pisika ng Pilipinas 29, SPP2011-PA-9 (2011). URL: https://paperview.spp-online.org/proceedings/article/view/3171.

A.A. Paguirigan, R.C. Batac, and C.P. Monterola. Emergence of small-avalanche rollover regimes by increased neighborhood interaction in a sandpile model, Proceedings of the Samahang Pisika ng Pilipinas 28, SPP-2010-PA-55 (2010). URL: https://paperview.spp-online.org/proceedings/article/view/SPP-2010-PA-55.

A.G. Longjas, I. Crisologo, R.C. Batac, E. F. T. Legara, and C.P. Monterola. Simultaneous visual and auditory cues enhance human random number generation, Proceedings of the Samahang Pisika ng Pilipinas 28, SPP-2010-1A-05 (2010). URL: https://paperview.spp-online.org/proceedings/article/view/SPP-2010-1A-05.

R.C. Batac, A.G. Longjas, and C.P. Monterola. Loss of self-organized criticality in a cascaded sandpile, Proceedings of the Samahang Pisika ng Pilipinas 28, SPP-2010-1A-06 (2010). URL: https://paperview.spp-online.org/proceedings/article/view/SPP-2010-1A-06.

R.C. Batac, A.G. Longjas, and C.P. Monterola, Size and waiting time statistics of multiple sandpile cascades, Proceedings of the 27th Physics Society of the Philippines Congress. Tagaytay City, Philippines (October 2009).

A.A. Paguirigan Jr., R.C. Batac, and C.P. Monterola, Time evolution of a landslide system with time-varying drying rates, Proceedings of the 27th Physics Society of the Philippines Congress. Tagaytay City, Philippines (October 2009).

A.A. Paguirigan, R.C. Batac, and C.P. Monterola, Effects of water on the stability of the sandpile model: Interplay between stabilization and saturation, Proceedings of the 27th Physics Society of the Philippines Congress. Tagaytay City, Philippines (October 2009).

I. Crisologo, R.C. Batac, A.G. Longjas, E.F.T. Legara, and C.P. Monterola, Waiting time statistics reveal natural period of humans in random number generation tasks, Proceedings of the 27th Physics Society of the Philippines Congress. Tagaytay City, Philippines (October 2009).

R.C. Batac, M.G. Pastor, and C.P. Monterola, Kinks and logarithmic tails as stability markers in binary granular piles, Proceedings of the 26th Physics Society of the Philippines Congress. Tagaytay City, Philippines (October 2008).

R.C. Batac, A.G. Longjas, G.A.P. Esleta, and C.P. Monterola, Cascading dynamics recovers actual landslide scaling exponent, Proceedings of the 26th Physics Society of the Philippines Congress. Tagaytay City, Philippines (October 2008).

A.G. Longjas, R.C. Batac, D.E.O. Juanico, and C.P. Monterola, Observation of self-organized criticality in a miniature granular mound, Proceedings of the 26th Physics Society of the Philippines Congress. Tagaytay City, Philippines (October 2008).

J. Tugaff, I. Crisologo, A.G. Longjas, R.C. Batac, and C.P. Monterola, Chalk Print? Feasibility of predicting the lecturer based on his/her chalk leftovers, Proceedings of the 26th Physics Society of the Philippines Congress. Tagaytay City, Philippines (October 2008).

E.F.T. Legara, A.G. Longjas, and R.C. Batac, Competition in a social structure, Proceedings of the 26th Physics Society of the Philippines Congress. Tagaytay City, Philippines (October 2008).

R.C. Batac, M.G. Pastor, M.E. Arciaga, and C.P. Monterola, Cellular automata model of repose angle formation of a binary granular mixture, Proceedings of the 25th Physics Society of the Philippines Congress. Baguio City, Philippines (October 2007).

A.G. Longjas, R.C. Batac, and C.P. Monterola, Experimental verification of a dissipative self-organized critical sandpile, Proceedings of the 25th Physics Society of the Philippines Congress. Baguio City, Philippines (October 2007).

R.C. Batac and J.Y. Bantang, Characterizing Cellular Automata Rules Using Quantitative Lattice Properties, Proceedings of the 24th Physics Society of the Philippines Congress. Iloilo City, Philippines (October 2006).

R.C. Batac and J.Y. Bantang, Characterizing elementary cellular automata rule 30 under single-cell overlap and information transfer, Proceedings of the Symposium on the Mathematical Aspects of Computer Science. Silang, Cavite, Philippines (August 2005).

R.C. Batac, J.Y. Bantang, and C.A. Saloma, Cellular Automata Model of n-Slit Light Diffraction, Proceedings of the 22nd Physics Society of the Philippines Congress. Tagbilaran City, Philippines (October 2004).