title: [Life expectancy and its modeling].
abstract: Modeling of the limited life span in an individual organism is discussed. Two models are presented in this discussion, a model of "natural technology" and a homeostatic model of aging in an organism. The problem of a transition from a model of an individual organism to a model of cohort and a population is studied. It is shown that it is enough to have only one property in an organism--death occurrence to model a cohort, whereas to model a population with overlapped generations two properties are needed, that is ability to die and ability to produce progenies. Examples of modeling of an individual organism, a cohort and a population are presented.
authors.forename: V N
authors.initials: VN
authors.lastname: Novosel'tsev
authors.forename: D
authors.initials: D
authors.lastname: Shvitra
authors.forename: Zh A
authors.initials: ZhA
authors.lastname: Novosel'tseva
mesh_terms: D000375:Aging / Q000502:physiology*; D000818:Animals; D016922:Cellular Senescence / Q000502:physiology; D006706:Homeostasis / Q000502:physiology; D006801:Humans; D008017:Life Expectancy / Q000639:trends*; D008954:Models, Biological