[The concept of time and time perception].
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Aged↗
Biomedical subjects
W Beier
Publications and source records attributed to W Beier.
[Physical time and personal biological time in gerontologic research].
Beside the reversible t-time of physics is introduced an irreversible logarithmical tau-time as a second time. This time is determined by growth, vitality, and reliability of an organism. Using the tau-time it is possible to divide the lifespan of an organism into four parts. Each segment is of approximately the same duration, namely a quarter of the lifespan. There is an analogy between tau-time and physical entropy.
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[Theoretical longevity and biological functional time].
It is shown in this study that the theoretical life span of an human being is given by the sum of two parts: the inverse value of its aging rate mu o, and the age tmw at the maximal growth rate. The age tmw is used as a unit of individual biological or functional time, which is an irreversible value.
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[Vector analytic evaluation of clinico-gerontologic data].
Using the concept of vector analysis and the mathematically theorized condition and age of patients as vectors in a right angle Cartesian coordinate system, the rate of aging and the functional age difference between males and females can be determined.
Adult↗
[Interpretation of a vitality model from the clinico-experimental viewpoint].
The vitality model conceived by Beier from a theoretical point of view is corroborated by clinical and experimental investigations of the authors. From a randomized study on the biological age of a statistically representative population group it can be concluded that the speed of ageing of this group is not linear in its course and hardly displays any differences between the sexes. Besides, distinct selection effects in advanced age suggest that the human population might consist of two sub-populations (the potentially long-lived and the potentially short-lived) who differ from one another with regard to the speed of ageing, morbidity and to the duration of life. Furthermore, similarities of the sex-specific change in vitality as occurs in the course of life, and the significance of this change for a possible reduction of male over-mortality are pointed out.
Adaptation, Physiological↗
[The concept of vitality and the Ries biological index].
Using the concept of vitality a relation between the inverse vitality and the Ries biological index is derived. It is shown that the parameter beta of the model I can be calculated from the exponent alpha of the biological index.
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[Dimensionless parameters of the human body and its significance for vitality. 1].
The purpose of this paper is to construct dimensionless parameters of the human organism from physical variables. To do this one has to combine clinical data and to study their age-dependence. In addition the relationship between these dimensionless parameters and vitality is analysed.
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[The regularity of aging].
The present paper formulates "laws" which govern the aging of human beings. The definition of aging is based on the vitality concept. These laws are divided into two classes: collective laws, and individual laws. They attempt to answer the questions: "How do organisms age?", and "Why do organisms age?" Up to now there are only preliminary answers.
Adult↗
[Unit-free mathematical values of aging].
From a mathematical model of aging are deduced three unit-free numbers. It is possible to calculate a critical value of the number beta t, where beta means the aging rate and t the chronological age of the organism. If beta t is greater than 1.84, then the theoretical life span is reached. Using an iteration method another unit-free number, namely, the quotient x of the growth rate and the aging rate beta is calculated to x = 4.5.
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