In this article, the temperature behavior of output power of superluminescent light-emitting diode (SLED) by considering the effect of non-radiative recombination coefficient, non-radiative spontaneous emission coefficient and Auger recombination coefficients has been investigated. For this aim, GaN pyramidal quantum dots were used as the active region. The numerical method has been used to sol...

The purpose of the study was to investigate the use of the equivalent square formula for determining the surface dose from a rectangular photon beam. A 6 MV therapeutic photon beam delivered from a Varian Clinac 23EX medical linear accelerator was modeled using the EGS4nrc Monte Carlo simulation package. It was then used to calculate the dose in the build-up region from both square and rectangu...

Context. We study the physics of the solar tachocline (i.e. the thin transition layer between differential rotation in the convection zone and quasi uniform rotation in the radiative interior), and related MHD instabilities. Aims. We have performed 3-D MHD simulations of the solar radiative interior to check whether a fossil magnetic field is able to prevent the spread of the tachocline. Method...

Introduction Several institutes have presented results on prostate imaging using a surface array of resonant stripline elements [1-3]. In the perspective of antenna theory, resonant stripline elements are near-field antennas with a high magnetic field in the near field zone around their conductors. This is an advantageous concept for MRI as long as the target region can be located in the near f...

We use the semi-analytical program RCFORGV to evaluate radiative corrections to one-photon radiative emission in the high-energy scattering of pions in the Coulomb field of a nucleus with atomic number Z. It is shown that radiative corrections can simulate a pion polarizability effect. The average effect is α π = −β π = (0.20±0.05)×10cm, for pion energies 40-600 GeV. We also study the range of ...

Although near-field radiative heat transfer was introduced in the 1950's, interest field has recently revived, as effect promises improved performance various applications where contactless temperature regulation small-scale is a requirement. With progress computational electromagnetics well nanoinstrumentation, it become possible to simulate complex configurations and measure with high precisi...