In this work, some phenomenological models, those that are based only on the population information (macroscopic level), are deduced in an intuitive way. These models, as for instance Verhulst, Gompertz and Bertalanffy models, are posted in such a manner that all the parameters involved have physical interpretation. A model based on the interaction (distance dependent) between the individuals (...

This study provides a summary of recently proposed alternatives period measures of "longevity" and assesses whether empirical differences between these measures are consistent with predictions from analytic studies. Particular attention is given to the tempo effect. Three of the five period measures are virtually equal to one another in a simulated population in which mortality follows a Gomper...

As a measure of sustainability, Fisher information is employed in the Gompertz growth model. The effect different oscillatory modulations examined on system's evolution and Probability Density Function (PDF). For sufficiently large frequency periodic fluctuations occurring both positive negative feedbacks, system maintains its initial conditions. A similar PDF shown regardless values when there...

In this study, in vitro gas production values (hour/ml) of standard, alfalfa and corn plants at 3, 6, 9, 12, 24, 36, 48, 72 96 hours Kahramanmaras Sutcu Imam University Animal Science Department Feeds Nutrition Laboratory. ) used cubic piecewise regression, Richard, Logistics, Gamma, Gompertz, Orscov, Sigmoaidal Quadratic Piecewise Regression models were used. the modeling mean squares error, d...

C is intense among rival technologies, and success depends on predicting their future trajectory of performance. To resolve this challenge, managers often follow popular heuristics, generalizations, or “laws” such as Moore’s law. We propose a model, Step And Wait (SAW), for predicting the path of technological innovation, and we compare its performance against eight models for 25 technologies a...

A porcentagem acumulada de germinação sementes Brachiaria brizantha tem um comportamento caracterizado por modelo sigmoidal, o qual é bem ajustado através modelos não lineares. Sendo assim, objetivo deste estudo foi avaliar a qualidade do ajuste dos lineares Logístico, Gompertz, von Bertalanffy e Brody na descrição utilizando-se os métodos superação dormência (H2SO4 KNO3) temperatura 20-35ºC. O...