the aim of this study was to compare the effects of random and blocked practices with respect to the changes in generalized motor program (gmp) and parameter on acquisition, retention and transfer of table tennis service. for this purpose, 32 subjects were randomly assigned to four groups (8 subjects each group). in the first two groups, gmp changed with blocked and random arrangements while in...

Pre-integrated volume rendering has become one of the most efficient and important techniques in three dimensional medical visualization. It can produce high-quality images with less sampling. However, two important issues have received little attention throughout the ongoing discussion of preintegration: Skipping over empty-space and the size of lookup table for a transfer function. In this pa...

Multi-dimensional transfer functions are commonly used in rectilinear volume renderings to effectively portray materials, material boundaries and even subtle variations along boundaries. However, most unstructured grid rendering algorithms only employ one-dimensional transfer functions. This paper proposes a novel pre-integrated Projected Tetrahedra (PT) rendering technique that applies bivaria...