speech sciences deal with the acoustical characteristics of speech by means of sophisticated soft wares as well as hard wares. although, a speech science is a well known science in the developed countries, especially the western societies, however, it has been remained almost unknown in iran, though, in recent years a group of scholars have been involved in this branch of science. the applicati...

MacKay's Bayesian framework for backpropagation is a practical and powerful means to improve the generalisation ability of neural networks. It is based on a Gaussian approximation to the posterior weight distribution. The framework is extended, reviewed and demonstrated in a pedagogical way. The notation is simpliied using the ordinary weight decay parameter, and a detailed and explicit procedu...

It is shown how the arithmetic structure of algebraic curves encoded in the HasseWeil L-function can be related to affine Kac-Moody algebras. This result is useful in relating the arithmetic geometry of Calabi-Yau varieties to the underlying exactly solvable theory. In the case of the genus three Fermat curve we identify the Hasse-Weil L-function with the Mellin transform of the twist of a numb...

We present a geometric construction of highest weight crystals B(λ) for quantum generalized Kac-Moody algebras. It is given in terms of the irreducible components of certain Lagrangian subvarieties of Nakajima’s quiver varieties associated to quivers with edge loops. Introduction The 1990’s saw a great deal of interesting interplay between the geometry of quiver varieties and the representation...

We bosonize the low energy excitations of Fermi Liquids in any number of dimensions in the limit of long wavelengths. The bosons are coherent superposition of electron-hole pairs and are related with the displacements of the Fermi Surface in some arbitrary direction. A coherent-state path integral for the bosonized theory is derived and it is shown to represent histories of the shape of the Fer...