Results 171 to 180 of about 22,337 (217)

Hormesis, gompertz functions, and risk assessment

Drug Metabolism Reviews, 1988
A historical survey of the literature indicates that benefits derived from low doses of toxic substances have been reported over many centuries. Hippocrates, Paracelsus, Arndt, Schulz, and Hahnemann (founder of homeopathy) have all reported that low doses of toxic substances may be "stimulatory" or otherwise beneficial.
H, Boxenbaum, P J, Neafsey, D J, Fournier   +2 more
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The Gompertz function does not measure ageing

Biogerontology, 2001
The Gompertz transform of the distribution function for the age at death expresses mortality in a form R = R0e(alphat) where R0 is the mortality at time zero and alpha is the rate of increase of mortality, frequently taken as the rate of ageing. The slope of the line alpha is frequently used as a measure of the rate of ageing.
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Survival Function Estimation for Fuzzy Gompertz Distribution with neutrosophic data

International Journal of Neutrosophic Science, 2023
A relatively recent area of research known as neutrosophic statistics deals with data that are ambiguous, indeterminate, and inconsistent. By embracing the idea of neutrosophy, which denotes the existence of three components in a statement: truth, falsity, and indeterminacy, it broadens the application of classical statistics.
Alan Adham Bibani, Zakariya Yahya Algamal   +1 more
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Transforming gompertz's function for fertility analysis: The development of a standard for the relational gompertz function

Population Studies, 1984
Summary The relational Gompertz function improves upon the Gompertz for fertility analysis by achieving a better fit in the tails of the distribution. This is obtained by a transformation of the age scale corresponding to an empirical standard. This standard is developed from Coale and Trussell's model and is appropriate for use with populations of ...
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A stochastic Gompertz model with logarithmic therapy functions: Parameters estimation

Applied Mathematics and Computation, 2012
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Moummou, El Kettani, Gutiérrez, R., Gutiérrez-Sanchez, R.   +2 more
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Prediction model based on Gompertz function

2009 2nd IEEE International Conference on Broadband Network & Multimedia Technology, 2009
A novel prediction model based on Gompertz function and Customer Life Cycle (CLC) is presented in this paper. Firstly, the calling behavior between the inner-net (China Unicom) mobile customers and the outer-net (China Mobile) mobile customers are extracted and analyzed, then fitted a CLC curve by Gompertz function. Furthermore, the different period of
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An algorithm to fit the Gompertz function to growth curves

Bioinformatics, 1992
An algorithm to fit the Gompertz growth function is presented. This algorithm is easy to program on a microcomputer. The algorithm is based on employing a searching technique to solve a set of equations derived from the Gompertz function. Its application may prove valuable when access to a computer mainframe is difficult. Such a method may be useful in
H, Pasternak, B A, Shalev
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A Mystery of the Gompertz Function

2006
The Gompertz function describes global dynamics of many natural processes including growth of normal and malignant tissues. On one hand, the Gompertz function defines a fractal. The fractal structure of time-space is a prerequisite condition for the coupling and Gompertzian growth. On the other hand, the Gompertz function is a probability function. Its
P. Waliszewski, J. Konarski
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Commutation functions under Gompertz–Makeham mortality

Scandinavian Actuarial Journal, 2010
It is known, but perhaps not well-known, that when the mortality is assumed to be of Gompertz–Makeham-type, the expected remaining life-length and the commutation functions used for calculating the expected values of various types of life insurances can be expressed with an incomplete gamma function with a negative shape parameter.
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