Given that Mandarin is a tone language and English is not, the present study investigated the perception of Mandarin tones in young school-aged children with or without tone language exposure. Mandarin Monolingual (MM), English-Mandarin Bilingual (EMB) and English Monolingual (EM) children aged 6 to 8 years participated in tone identification and discrimination tasks. Tone identification and di...

We have introduced an early warning system for volatility regimes regarding Tehran Stock Exchange using Markov Switching GARCH approach. We have examined whether Tehran Stock Market has calmed down or more specifically, whether the surge in volatility during 2007-2010 global financial crises still affects stock return volatility in Iran.  Doing so, we have used a regime switching GARCH model.  ...

In this paper some approximate methods for solving the initial-boundary value problem for the heat equation in a cylinder under homogeneous boundary conditions are analyzed. The methods consist in discretizing with respect to time and solving approximately the resulting elliptic problem for fixed time by least squares methods. The approximate solutions will belong to a finite-dimensional subspa...

A sufficient condition for the spatial collapse in an infinite system of interacting Bose particles is obtained on basis variational principle with use trial functions Jastrow pair correlation factors. The instability a hypothetical α-particles respect to shown under assumption Ali–Bodmer interaction potentials between such particles. Thus, it becomes clear why nuclear matter naturally treated ...

Associate Professor, Department of Virology, Pasteur Institute of Iran, Tehran, Iran Assistant Professor, Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences AND Department of Operative Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran Associate Professor, Dental Research Center, Dentistry Research Institute, Tehran Unive...