@inproceedings {734, title = {Speed distribution of relativistic one-dimensional Gentile particles in a box}, booktitle = {Proceedings of the 44th Samahang Pisika ng Pilipinas Physics Conference}, year = {2026}, month = {17-20 Jun 2026}, pages = {SPP-2026-1B-05}, address = {Los Ba{\~n}os}, abstract = {We show the morphological transition in the speed distribution for identical particles in a 1D infinite well. By including the relativistic dispersion relation in numerical calculations for particles following Gentile statistics, we recover the Maxwell-J{\"u}ttner distribution. Our results show that the transition to the relativistic case occurs at lower critical temperature for fermions than for bosons. For systems with intermediate statistics, this transition occurs at temperatures between these two limits.}, url = {https://proceedings.spp-online.org/article/view/SPP-2026-1B-05}, author = {Amancio II S. Manceras and Noel M. Lamsen} } @conference {481, title = {Genetic diversity in asexually reproducing populations of the semelparous Penna model}, year = {2018}, month = {18{\textendash}19 June 2018}, pages = {P129}, publisher = {ASTHRDP Graduate Scholars{\textquoteright} Conference}, address = {PICC, Pasay City}, abstract = {We quantify the diversity of populations simulated using the Penna model with an entropy of genetic diversity measure by Pan et al. When selection is removed by increasing the resistance to disease, populations result to a zero-steady state diversity. While for cases with selection, greater genetic diversity was achieved by delaying reproduction. It was also found that populations with genetic diversity tend to have increased average lifespan and resilience to epidemics.}, author = {Amancio II S. Manceras and Ronald S. Banzon} } @conference {manceras2017spc, title = {An advantage of greater diversity}, year = {2017}, month = {24{\textendash}26 May 2017}, pages = {126}, publisher = {12th Siam Physics Congress}, address = {Rayong, Thailand}, abstract = {We find greater genetic diversity in a Penna model when the mutation threshold is less than the reproductive age, for the case of individuals reproducing only once in their lifetime. This greater diversity is obtained at the cost of decreased saturation population. An increased mean lifespan was obtained for the population with greater genetic diversity. We interpret this longer lifespan as a benefit that supports the idea that it is better to have greater genetic diversity.}, url = {https://indico.cern.ch/event/486350/contributions/2493755}, author = {Amancio II S. Manceras and Ronald Banzon} } @inproceedings {manceras, title = {Resilience in a semelparous Penna model}, booktitle = {Proceedings of the 35th Samahang Pisika ng Pilipinas Physics Conference}, year = {2017}, month = {7{\textendash}10 June 2017}, pages = {SPP-2017-3B-06}, address = {Cebu City, Philippines}, abstract = {We consider the effect of a harsher environment on Penna populations with different genetic diversities. A change in the environment, in the form of an epidemic, is simulated by a lowering of the mutation threshold. Our results suggest that populations with greater genetic diversity have a greater probability of survival during an epidemic.}, url = {http://paperview.spp-online.org/proceedings/article/view/132}, author = {Amancio II S. Manceras and Ronald Banzon} } @inproceedings {334, title = {Genetic diversity in a Penna model}, booktitle = {Proceedings of the 34th Samahang Pisika ng Pilipinas Physics Congress}, year = {2016}, month = {18{\textendash}21 Aug 2016}, pages = {SPP-2016-PA-20}, address = {University of the Philippines Visayas, Iloilo City}, abstract = {We considered genetic diversity within the framework of the Penna model. Using the entropy of genetic diversity as measure, we found genetic diversity to increase with reproductive age R, for the case where the threshold parameter T is less than R. In addition, we found the saturation population to decrease with increasing genetic diversity.}, author = {Amancio II S. Manceras and Ronald Banzon} }