Results 111 to 120 of about 30,743 (170)

Cultural versus demic diffusion in agricultural expansions according to three definitions of dispersal distances

open access: yesArchaeological and Anthropological Sciences
AbstractMathematical models of agricultural spread use distances between birthplaces of parents and their children (often called “birthplace distances”). However, the difficulty to find those distances for pre-industrial farmers has often led to the use of other kinds of distances.
Bancells, Pere, Fort, Joaquim
openaire   +2 more sources

Solidity of viscous liquids II: Anisotropic flow events

open access: yes, 1999
Recent findings on the displacements in the surroundings of isotropic flow events in viscous liquids [Phys. Rev. E, to appear Feb. 1999] are generalized to the anisotropic case.
Dyre, Jeppe. C.
core   +1 more source

Subdiffusion-limited reactions

open access: yes, 2001
We consider the coagulation dynamics A+A -> A and A+A A and the annihilation dynamics A+A -> 0 for particles moving subdiffusively in one dimension. This scenario combines the "anomalous kinetics" and "anomalous diffusion" problems, each of which leads ...
A. Blumen   +31 more
core   +1 more source

Halting viruses in scale-free networks

open access: yes, 2002
The vanishing epidemic threshold for viruses spreading on scale-free networks indicate that traditional methods, aiming to decrease a virus' spreading rate cannot succeed in eradicating an epidemic.
A. L. Barabási   +23 more
core   +1 more source

A view of the neolithic demic diffusion in Europe through two Y chromosome-specific markers. [PDF]

open access: yesAm J Hum Genet, 1996
This study has revealed two distinct Y-chromosome markers, the pl2f2-8-kb allele, specific to Caucasoids and the 49af-Ht 15, specific to Europeans, which are valuable to detect genetic admixtures. They show an opposite gradient of frequencies from the Near East to western Europe, illustrating well the "wave of advance" of the neolithic demic expansion ...
Semino O   +4 more
europepmc   +2 more sources

Interpreting the demic diffusion of early farming in Europe with a three-population model

open access: yesHuman Population Genetics and Genomics
In 1971, Ammerman and Cavalli-Sforza demonstrated that reaction-diffusion equations could be usefully applied to the archaeological question of the spread of early farming in Europe. Their basic premise was demic diffusion, i.e., the iterative short-range colonization of virgin land by the descendants of the original Near Eastern farmers.
openaire   +1 more source

Genomic perspectives on human dispersals during the Holocene. [PDF]

open access: yesProc Natl Acad Sci U S A, 2023
Stoneking M   +5 more
europepmc   +1 more source

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