Fritz Graebner, in full Robert Fritz Graebner (born March 4, 1877, Berlin, Ger. died July 13 , 1934 Berlin), German ethnologist who advanced the theory of the Kulturkreise, or culture complex, which postulated diffusions of primitive culture spheres derived from a single archaic type.
March 4, 1877 Berlin, Germany July 13 , 1934Berlin, Germany Fritz Graebner, in full Robert Fritz Graebner (born March 4, 1877, Berlin, Ger. died July 13 , 1934 Berlin), German ethnologist who advanced the theory of the Kulturkreise, or culture complex, which postulated diffusions of primitive culture spheres derived from a single archaic type.
He was skeptical of the theory of Kulturkreis ("culture sphere"), which postulates early diffusion of cultural elements from a primeval area of human development.
We postulated that diffusion of macromolecules is hindered both by the collagen network and by the hydrophilic gel of GAG and proteoglycans.
According to experimental data, we postulate that the diffusion coefficient follows a modified Arrhenius equation with a concentration dependence of the pre-exponential factor but also of the activation energy.
12 It is postulated that the diffusion of solids from food to gastric fluids during digestion involves three steps.
Paulina Kernberg elucidated in 2000 a model for understanding identity pathology in children and adolescents and postulated that identity diffusion is the result of failure to consolidate identity at each stage from childhood through adolescence [ 5].
Modelers often need to postulate additional pitch angle diffusion in order to fit the observed anisotropies.
It is postulated that the restricted diffusion in abscesses is attributable to high viscosity of pus resulting from high protein and different types of viable or dead cells, along with necrotic tissue and bacteria [123].
The demic diffusion model postulates the spreading of farmers from the Middle East along a Southeast to Northeast axis.
Transition time is defined as a point, at which two straight lines fitted to regions corresponding to anomalous and to normal regimes intersect on a double logarithmic plot, as is shown schematically in Fig. 8. Anomalous diffusion is postulated to be valid for t≪tc, crossing over to normal diffusion when t≫tc.
