In this paper I have explored four areas of current interest to pain control in dentistry. Articaine HCl, the most recent addition to the dental LA armamentarium, has become a favoured drug in many, if not most, countries in which it is available. Rapid onset and improved hard- and soft-tissue penetration enable articaine HCl to be administered with great success as a mandibular infiltration, p...

A new local, covariant and nilpotent symmetry is shown to exist for the interacting BRST invariant U(1) gauge theory in two dimensions of spacetime. Under this new symmetry , it is the gauge-fixing term that remains invariant and the corresponding transformations on the Dirac fields turn out to be the analogue of chiral transformations. Possible interpretation and implication of this symmetry a...

A new learning strategy is proposed for training of radial basis functions (RBF) network. We apply two different local optimization methods to update the output weights in training process, the gradient method and a combination of the gradient and Newton methods. Numerical results obtained in solving nonlinear integral equations show the excellent performance of the combined gradient method in ...