Biconservative submanifolds, with important role in mathematical physics and differential geometry, arise as the conservative stress-energy tensor associated to variational problem of biharmonic submanifolds. Many examples biconservative hypersurfaces have constant mean curvature. A famous conjecture Bang-Yen Chen on Euclidean spaces says that everybiharmonic submanifold has null Inspired by co...

Background: Substance abuse is one of the main health problems in Iran and awareness about its spread and procedure of spread in the society, particularly the susceptible society of students, is very important with regard to the population pyramid of Iran. Methods: This study was performed by cross-sectional method. The sampling size was 610 male students in pre-university grade by a probabilis...

In this paper, applying two theorems of Ricceri and Bonanno, we will establish the existence of three weak solutions for a quasilinear elliptic system. Indeed, we will assign a differentiable nonlinear operator to a differential equation system such that the critical points of this operator are weak solutions of the system. In this paper, applying two theorems of R...

To help the prospective observer take full advantage of the mid-IR capability of Gemini South, we characterize a key aspect of the mid-IR performance of the 8-meter telescope at Gemini-S, namely, the appearance and stability of its delivered mid-IR image profiles, with the goal of demonstrating that it can be used with a level of precision not used before. About 2000 images obtained with T-ReCS...

A new method for the stabilization of time-varying autoregressive models is proposed. The method is based on the interpretation of the underdetermined time-varying least squares prediction problem as an ill-posed inverse problem. The problem is regularized with the Tikhonov approach and is then augmented with nonlinear hyperstability constraints. The problem is solved iteratively with an exteri...

This paper analyzes the impact of various assumptions about the association between aggregate default probabilities and the loss given default on bank loans and corporate bonds, and seeks to empirically explain this critical relationship. Moreover, it simulates the effects on mandatory capital requirements like those proposed in 2001 by the Basel Committee on Banking Supervision. We present the...