An Improved Image Steganography Technique Using Discrete Wavelet Transform Richika Mahajan, B.V. Kranthi Electronics and Communication Engineering Lovely Professional University Jalandhar, Punjab, India _________________________________________________________________________________________ Abstract: This paper proposes a new method for hiding a data in frequency domain. In this a spatial doma...

An optimization method combining a genetic algorithm and the paralleling discrete ordinate code is developed applied to shielding design of Savannah reactor. Several approaches are studied cope with multi-objective problem, such as transforming into single-objective approach, non-dominated sorting approach adding constraints on sub-objectives. Comparing current methods, in this study shows bett...

Thermal analysis of a cylindrical tissue subject to a train of ultrashort pulse irradiations was made by developing a combined time-dependent radiation and conduction bio-heat transfer model. Ultrashort pulsed radiation transport in the cylindrical tissue is simulated using the transient discrete ordinate method. Treatment of focused beam is introduced. The model skin tissue is stratified as th...

This paper describes the reduction in memory and computational time for simulation of complex radiation transport problems with discrete ordinate method (DOM) model open-source fluid dynamics platform OpenFOAM. Finite volume models require storage vector variables each spatial cell; DOM introduces two additional discretizations, direction wavelength, making a limiting factor. Using speci...

An algorithm for the retrieval of total column amount trace gases in a multi-dimensional atmosphere is designed. The uses (i) certain differential radiance models with internal and external closures as inversion models, (ii) iteratively regularized Gauss–Newton method regularization tool, (iii) spherical harmonics discrete ordinate (SHDOM) linearized radiative transfer model. For efficiency rea...

The spherical harmonics (PN) method is widely used in solving the neutron transport equation, but it has some disadvantages. One of them omes from the complexity of the PN equations. Another one comes from the difficulty of dealing with the vacuum boundary condition exactly. In his paper, the PN method is applied to the self-adjoint angular flux (SAAF) neutron transport equation and a set of PN...

Discrete ordinate (SN) and filtered spherical harmonics (FPN) based schemes have been proven to be robust accurate in solving the Boltzmann transport equation but they their own strengths weaknesses different physical scenarios. We present a new method on finite element approach angle that combines of both methods mitigates disadvantages. The angular variables are specified geodesic grid with f...

Several conventional methods present in refrigerators today consider varying actuators between its minimum and maximum values (Single speed control) or at several values between minimum and maximum values (Discrete speed control). The work done here presents an organized control design method based on appropriate modeling techniques to co-ordinate control inputs in order to achieve improvement ...