@inproceedings {nombres-spp-2004,
	title = {Random deaths and chaos in a Penna model},
	booktitle = {Proceedings of the 22nd Samahang Pisika ng Pilipinas Physics Congress},
	year = {2004},
	month = {25{\textendash}27 Oct 2004},
	pages = {54},
	address = {Bohol Tropics Resort, Tagbilaran City},
	abstract = {<div>We utilise an 8-bit Penna bit-string model of biological aging in studying the dynamics of an asexually reproducing, single species and non-migrating population using a modified version of the Verhulst death factor. It was seen that different implementations of the death procedure, one that is applied to all the individuals within the population (<em>VA</em>), and one that is applied only to newborns (<em>VB</em>) exhibited some similar, but mostly different dynamical behaviours. It was shown that the <em>VB</em> population has a higher level of chaos as compared to <em>VA</em>. Aside from an increase in the birth rate, <em>B</em>, chaos also resulted from an increase in the mutation threshold, <em>T</em>.</div>},
	author = {Chris Nombres and Ronald S. Banzon}
}