Kok Swee Sim

Abstract The fluidized granular media is a complex phenomenon with sharp regime changes, pattern formation, and coherent density-wave propagation that is usually treated by nonlinear evolution equations, which are reduced. Of these, the van der Waals normal form, a fourth-order nonlinear oscillator with viscous/frictional dissipation and cubic nonlinearity, offers a general model with which to investigate such phenomena.

Abstract Contrast enhancement technique is a prevalent problem in aiding interpretation of Magnetic Resonance Imaging (MRI) images. A low contrast MRI image may prove to be problematic in identifying medical problems such as brain tumor in the image, either in visual identification or by automated algorithm such as machine learning. This study proposes a novel enhancement technique for Brain MRI images named Genetically Adapted Dual Cut Histogram Equalization (GADCHE).