HPP model

The HPP model is a fundamental lattice gas automaton for the simulation of gases and liquids. It was a precursor to the lattice Boltzmann methods. From lattice gas automata, it is possible to derive the macroscopic Navier-Stokes equations. Interest in lattice gas automaton methods levelled off in the early 1990s, due to rising interest in the lattice Boltzmann methods.

History

The HPP model was first introduced in papers published in 1973 and 1976 by Hardy, Pomeau and de Pazzis, whose initials give the model its name. The model can be used as a simple model for both the movement of gases and fluid.

Model

In this model the lattice takes the form of a two-dimensional square grid, with particles capable of moving to any of the four adjacent grid points which share a common edge, and particles cannot move diagonally. This means each grid point can only have one of sixteen possible interactions.

Lee So-young (artist)

Lee So-young (born 31 August 1973) is South Korean manhwa artist. Her works including Model and Arcana are licensed by Tokyopop.

Works

References

Model (art)

An art model is a model who poses for any visual artist as part of the creative process. The most common types of art works which use models are figure drawing, figure painting, sculpture and photography, but almost any medium may be used.

Art models are often paid professionals who pose or provide the human figure in a work of art. Though professional, art models are usually anonymous and unacknowledged subjects of the work. Models are most frequently employed for art classes or by informal groups of experienced artists that gather to share the expense of a model. Models are also employed privately by professional artists. Although commercial motives dominate over aesthetics in illustration, its artwork commonly employs models. For example, Norman Rockwell used his friends and neighbors as models for both his commercial and fine art work. An individual who is having their own portrait painted or sculpted is usually called a "sitter" rather than a model, since they are paying to have the work done rather than being paid to pose.

Mimicry

In evolutionary biology, mimicry is a similarity of one species to another that protects one or both. In the case of prey species, it is a class of antipredator adaptation. This similarity can be in appearance, behaviour, sound or scent. Mimics occur in the same areas as their models.

Mimicry occurs when a group of organisms, the mimics, evolve to share perceived characteristics with another group, the models. The evolution is driven by the selective action of a signal-receiver or dupe. Birds, for example, use sight to identify palatable insects (the mimics), whilst avoiding the noxious models.

The model is usually another species, except in cases of automimicry. The deceived signal-receiver is typically another organism, such as the common predator of two species. As an interaction, mimicry is in most cases advantageous to the mimic and harmful to the receiver, but may increase, reduce or have no effect on the fitness of the model depending on the situation. The model may be hard to identify: for example, eye spots may not resemble any specific organism's eyes, and camouflage often cannot be attributed to a particular model.