A direct numerical simulation method for complex modulus of particle dispersions

We report an extension of the smoothed profile method (SPM)[Y. Nakayama, K. Kim, and R. Yamamoto, Eur. Phys. J. E {\bf 26}, 361(2008)], a direct numerical simulation method for calculating the complex modulus of the dispersion of particles, in which we introduce a temporally oscillatory external force into the system. The validity of the method was examined by evaluating the storage $G'(\omega)$ and loss $G"(\omega)$ moduli of a system composed of identical spherical particles dispersed in an incompressible Newtonian host fluid at volume fractions of $\Phi=0$, 0.41, and 0.51. The moduli were evaluated at several frequencies of shear flow; the shear flow used here has a zigzag profile, as is consistent with the usual periodic boundary conditions

Chaaj (Mesoamerican Ballgame): An ancient game between cultural emergencies

The Meso-American ball games are corporal manifestations that have come being explored mainly from archaeological and historical perspectives. They have also been recaptured from different initiatives to put them into practice.However to say that the chaaj in mesoamérica is today a recreational and sport alternative, is to keep in little its demonstrated potential. The sacralidad manifested through the corporal movements is offering innovation options of the current societies. There they put at stake the codexes, the archaeological interpretations and the territorial knowledge. In their ludica dimension, the game gathers cultural, sport and pedagogic elements. In the last years it comes registering an unusual promotion. It amid the current times of change that were announced from immemorial times by the mayan knowing: men and women