allergic rhinitis (ar) is one of the most common allergic disorders of child¬hood. in order to determine the frequency of ar among school-age children, a cross-sectional study was performed. one thousand, nine hundred and thirty-two children (931 boys and 1001 girls), aged 7-18 years, from 30 systematic randomly selected schools of tehran, the capital of iran, were investigated in this study. s...

In this paper the long time asymptotic behavior of solutions of semilinear symmetric hyperbolic system including Maxwell s equations and the scalar wave equation in an ar bitraty domain are investigated The possibly nonlinear damping term may vanish on a certain subset of the domain It is shown that the solution decays weakly to zero if and only if the initial state is orthogonal to all station...

An analytical version of the discrete-ordinates method (the ADO method) is used with recently reported analytical forms for the rigid-sphere scattering kernels to establish a concise and particularly accurate solution to the temperature-jump problem for a binary gas mixture described by the linearized Boltzmann equation. The solution yields, in addition to the temperature-jump coefficient for t...

The self-consistent integral equation for the field distribution of the resonant modes in a resonator with a tilted retroreflecting corner cube mirror is solved. The corner cube acts like a convex lens with radius of curvature -L cot(2)theta in the rotation direction (L is the cavity length and theta the rotation angle) and like a flat plane in the direction of the rotation axis. The field dist...

Correspondence: [email protected]. cn Department of Mathematics, Harbin Institute of Technology, Harbin, China Abstract We first introduce and study a new family of weights, the A(a, b, g; E)-class which contains the well-known Ar(E)-weight as a proper subset. Then, as applications of the A(a, b, g ;E)-class, we prove the local and global Poincaré inequalities with the Radon measure for the solut...

In this paper we look at a discretization of a continuous-time threshold AR(1) process (CTAR(1)) and show how to apply perfect simulation to find the stationary distribution of the resulting stochastic difference equation. Such method leads to perfect solutions of stochastic difference equations of this kind. Depending on how sensitive the original CTAR(1) process is to the discretization, the ...

An analytical version of the discrete-ordinates method is used to develop a concise and particularly accurate solution of the heat-transfer problem for a binary gas mixture confined between two parallel plates. The formulation of the problem allows general specular-diffuse Maxwell boundary conditions for each of the two types of particles and is based on a form of the linearized Boltzmann equat...

The asymptotic symmetry group (ASG) at future null infinity (I+) of four-dimensional de Sitter spacetimes is defined and shown to be given by the group of three-dimensional diffeomorphisms acting on I+. Finite charges are constructed for each choice of ASG generator together with a two-surface on I+. A conservation equation is derived relating the evolution of the charges with the radiation flu...

Abstract Effective education and evaluation may be achieved when the mental emotional health of students being evaluated are taken into consideration. As a consequence this, purpose this research was to try highlight dynamic that exists between Test Anxiety (TA), Academic Emotion Regulation (AER), L2 grit (L2G), academic resilience (AR), core self-assessment (CAS). In order accomplish goal, 417...