in this paper the dynamic of a droplet on a surface with a hole is investigated under gravitational effect by using lattice boltzmann method. incompressible two-phase flow with high density ratio proposed by lee is considered. cahn’s theory is used to observe the wettability of the surface in contact with liquid and gas phases. several parameters such as contact angle, surface tension and gravi...

The use of data mining by organizations has grown sizeably because thanks to Moore’s Law, over the last decade especially, organizations have been able to gather vast amounts of data during their operations. However, the results accruing from this usage of data mining on operational data has been mixed. Data mining is intended to be a non-trivial process of identifying interesting patterns, whe...

Wheel/rail contact simulation is one of the most complicated problems in the modeling of railway vehicles. The wheel/rail interaction plays a unique role in rail vehicle dynamics. In this paper, the dynamic response of the wheel on irregular rail track is analyzed with analytical approach using the method of Multiple Scales (MMS). The Hertzian contact theory is used to obtain the relationshi...

The local mechanical properties of cells are frequently probed by force indentation experiments carried out with an atomic force microscope. Application of common contact models provides a single parameter, the Young's modulus, to describe the elastic properties of cells. The viscoelastic response of cells, however, is generally measured in separate microrheological experiments that provide com...

While heterogeneity in social behaviour has been described in many human contexts it is often assumed to be less common in the animal kingdom even though scale-free networks are observed. This homogeneity raises the question of whether the patterns of behaviour necessary to account for scale-free social contact networks, where the degree distribution follows a power law, i.e. a few individuals ...

trade secrets has an important role in economic growth and development of economic competition. however ,one of the challenges in this sphere is the emergence of economice spionag. increasing growth of economic espionage causes to emerge a new phenomenon which is called information terrorism. so the mechanism of protection of the trade secretsincivil and criminal law is necessary for economic g...

A contact problem is considered in which an elastic half-plane is pressed against a rigid fractally rough surface, whose pro­ le is de­ ned by a Weierstrass series. It is shown that no applied mean pressure is su ̄ ciently large to ensure full contact and indeed there are not even any contact areas of ­ nite dimension|the contact area consists of a set of fractal character for all values of the ...

in this paper an energy dissipation rate control (edrc) method is introduced, which could provide stable walking or running gaits for legged robots. this method is realized by developing a semi-analytical pattern generation approach for a robot during each single support phase (ssp). as yet, several control methods based on passive dynamic walking have been proposed by researchers to provide an...

In this paper the dynamic of a droplet on a surface with a hole is investigated under gravitational effect by using lattice Boltzmann method. Incompressible two-phase flow with high density ratio proposed by Lee is considered. Cahn’s theory is used to observe the wettability of the surface in contact with liquid and gas phases. Several parameters such as contact angle, surface tension and gravi...