Lizard Scale Patterns Described with Antiferromagnetic Model

Ecosystem complexity described with ontological tool for a multi-scale, multi-model approaches in distributed environment

Aquatic ecosystems are natural complex systems. They are the site of a great number of phenomena. Thus, many studies model each of these phenomena, using law-based approach (most of the time differential equations ) or rulebased approach (individual-based models in particular). Owing to their complex nature, aquatic ecosystems are hard to study and resist a reductionist approach. We based our m...

Antiferromagnetic triangular Blume-Capel model with hard-core exclusions.

Using Monte Carlo simulation, we analyze phase transitions of two antiferromagnetic (AFM) triangular Blume-Capel (BC) models with AFM interactions between third-nearest neighbors. One model has hard-core exclusions between the nearest-neighbor (1NN) particles (3NN1 model) and the other has them between the nearest-neighbor and next-nearest-neighbor particles (3NN12 model). Finite-size scaling a...

Large-scale atmospheric circulation patterns associated with the occurrence of severe storms Zab basin

Galactic Rotation Described with Thin-Disk Gravitational Model

The measured rotation velocity profiles of mature spiral galaxies are successfully described with a gravitational model consisting of a thin axisymmetric disk of finte radius. The disk is assumed uniformly thin but with variable radial mass density. The governing integral equation is based on mechanical balance between Newtonian gravitational and centrifugal forces (due to galaxy rotation) at e...

Learning to Localize Sound with a Lizard Ear Model

The peripheral auditory system of lizards [8] is highly directional [2]. The system is medially symmetrical and relatively simple in design. Due to a smaller head size with respect to the wavelength of the sounds to which it responds, the incident sound waves diffract around the lizard’s head, resulting in approximately equal sound pressure at the two ears. However, there is a phase difference ...