Photography is a 2-dimensional medium which represents 3-dimensional space, as a central projection on a plane. As it is possible to represent 3D space by a photograph, it is also possible, using mathematical methods, to obtain data about 3-dimensional structures from the data registered on photographs. We used two methods to obtain spatial data from photographs: restitution of perspective imag...

We investigate the dynamics of a driven system of dissipative hard spheres within mode-coupling theory. The dissipation is modeled by normal restitution, and driving is applied to individual particles in the bulk. In such a system, a glass transition is predicted for a finite transition density. With increasing dissipation, the transition shifts to higher densities. Despite the strong driving a...

The hydrodynamics of granular gases of viscoelastic particles, whose collision is described by an impact-velocity dependent coefficient of restitution, which is developed using the Chapman-Enskog approach. We derive the hydrodynamic equations and the according transport coefficients with the assumption that the shape of the velocity distribution function follows adiabatically the decaying tempe...

We investigate the cooling rate of a gas of inelastically interacting particles. When we assume velocity dependent coefficients of restitution the material cools down slower than with constant restitution. This behavior might have large influence to clustering and structure formation processes. PACS numbers: 83.70.Fn, 62.40.+i, 81.40.Lm, 05.40. -y, 46.10 +z Typeset using REVTEX 1 The behavior o...

The present study was focused on identification of possible differences in the onset and time course of mechanical restitution in guinea pig multicellular heart preparations, i.e., papillary muscles from the right and left ventricles. Stimulated twitches of both preparations mounted in a horizontal perfusion bath were recorded simultaneously. Mechanical restitution curves were constructed at 25...

The Office for Victims of Crime recommends that victims should be informed, consulted, respected, and made whole, rights that relate to informational, procedural, interpersonal, and distributive justice. We surveyed 238 victims in two Pennsylvania counties to test whether crime victims' satisfaction with the criminal justice system was related to their perceptions of the fairness of the process...

We report two-dimensional simulations of strongly vibrated granular materials in zero gravity. The coefficient of restitution depends on the impact velocity between particles by taking into account both the viscoelastic and plastic deformations of particles, occurring at low and high velocities respectively. Use of this realistic restitution coefficient leads to new unexpected behaviors. When t...

Aim at the random problems of flying gangue movement in steeply dipping seam mining, based on the spherical flying gangue movement model, computational formula of collision restitution coefficient was established when flying gangue shocks bottom plate of working face according to the theory of Hertz classical elastic collision; Considering the influences of the randomness such as the density, r...

I used Continuity, a tool for finite element analysis, to model isotropic propagation of electrical activity based on the monodomain equation. I was able to induce action potential duration (APD) alternans, an important potential precursor to atrial fibrillation, and found that modulating several variables to mimic isoproterenol administration increased the slope of the restitution curve at low...

The effect of friction in the thermal convection instability of granular fluids is studied by means of molecular dynamics simulations. It is found that the transitions between different convective states (zero, one, and two rolls) are primarily governed by the average energy loss per collisions and not by the friction and restitution coefficients separately, and can be roughly described in term...