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...

In this work, the optimization for a radiative-convective annular fin of arbitrary profile with base wall thermal resistances is considered. A fourth order Runge-Kutta method is used to solve the associated non-linear governing equations. Further differentiations yield the optimum heat transfer and the optimum fin dimensions. To facilitate the thermal design, design charts for optimum dimension...

We present a radiative transfer model, which is applicable to the study of submillimetre spectral line observations of protostellar envelopes. The model uses an exact, non-LTE, spherically symmetric radiative transfer ‘Stenholm’ method, which numerically solves the radiative transfer problem by the process of ‘Λ-iteration’. We also present submillimetre spectral line data of the Class 0 protost...

A global aerosol model with relatively high resolution is used to simulate the distribution and radiative effect of aerosols during the Aerosol Direct Radiative Impact Experiment (ADRIEX) campaign in August and September 2004. The global chemical transport model Oslo CTM2 includes detailed chemistry, which is coupled to aerosol partitioning of sulphate, nitrate and secondary organic aerosols. I...

1 Two Madden-Julian Oscillation (MJO) events, observed during October and November 2011 in 2 the equatorial Indian Ocean during the DYNAMO field campaign, are simulated in a small-3 domain cloud-resolving model using parameterized large-scale dynamics. Three 4 parameterizations of large-scale dynamics-the conventional weak temperature gradient (WTG) 5 approximation, vertical mode based spectral...

Referee: This article describes an updated retrieval method to obtain water vapour columns in polar regions from the MHS and AMSU-B instruments. The improvements to current methods are described and the new method tested against synthetic and real data. The new method involves using a-priori information and iterating a radiative transfer model to optimise the optical depth profile by scaling th...

The tachocline is a thin shear layer located near the interface between the uniformly rotating radiative zone and the differentially rotating convective zone in the Sun. Indeed, helioseismic observations (Schou et al. 1998; Gough 2007) reveal that the base of the convection zone has an angular velocity profile Ωcz(θ) consistent with Ωcz(θ) = Ωeq(1− a cos 2 θ − b cos θ) with Ωeq = 2.9× 10 s, a =...