More robust developments of schemes for hyperbolic systems, that avoid dependence upon a characteristic decomposition have been achieved by employing some form of a Lax-Friedrichs (LF)based flux. Such schemes permit the construction of higher order approximations without recourse to characteristic decomposition. This is achieved by using the maximum eigenvalue of the hyperbolic system within th...

in a multi-secret sharing scheme, several secret values are distributed among a set of n participants.in 2000 chien et al.'s proposed a (t; n) multi-secret sharing scheme. many storages and publicvalues required in chien's scheme. motivated by these concerns, some new (t; n) multi-secret sharingschemes are proposed in this paper based on the lagrange interpolation formula for polynomials andcip...

We present a numerical study of the axisymmetric Couette–Taylor problem using a finite difference scheme. The scheme is based on a staggered version of a second-order centraldifferencing method combined with a discrete Hodge projection. The use of central-differencing operators obviates the need to trace the characteristic flow associated with the hyperbolic terms. The result is a simple and ef...

A novel numerical scheme has been developed to simulate high speed viscous flows in complex geometries using unstructured grids. A characteristic–filter based shock capturing scheme is applied as a corrector step to a non–dissipative predictor scheme. This algorithm is being used to study shock turbulent boundary layer interactions and this paper presents the results of a turbulent flow at Mach...

This paper presents a low-overhead secure network coding scheme. The randomness of chaotic sequence is extremely sensitive to initial conditions characteristic of the program, the combination of the chaotic sequence with the original source message vector to construct a new cryptosystem to achieve the perfect secrecy of the encoding scheme. The program only in the original random network coding...

Recently, Wireless sensor networks (WSNs) are increasingly receiving attention in both industrial and academic areas. Most research on WSNs focus on routing and data aggregation; only a few papers discuss the quality of service (QoS). An earlier study introduced a QoS control approach based on the gur game. The gur game-based scheme can maintain the QoS without knowing total number of sensors. ...

In this paper, a neural network based adaptive sliding mode control scheme for hysteretic systems is proposed. In this control scheme, a neural network model is utilized to describe the characteristic of hysteresis. Then, the adaptive neural sliding mode controller based on the proposed neural model is presented for a class of single-input nonlinear systems with unknown hysteresis. For the case...

This study highlights the costs and benefits of indigenous beef cattle fattening schemes in Shinyanga Urban and Kishapu Districts in Tanzania. Specifically, in this study the net profit (NP) for fatteners between beef cattle fattening schemes has been determined. The schemes were divided into two main categories, scheme 1 in which the animals were fed on cottonseed hulls (CSHL) based diets and ...

in this paper a wavelet-based logo watermarking scheme is presented. the logo watermark is embedded into all sub-blocks of the lln sub-band of the transformed host image, using quantization technique. extracted logos from all sub-blocks are merged to make the extracted watermark from distorted watermarked image. knowing the quantization step-size, dimensions of logo and the level of wavelet tra...

This work introduces a novel method to estimate the characteristic scale of low-level image structures, which can be modeled as superpositions of intrinsically one-dimensional signals. Rather than being a single scalar quantity, the characteristic scale of the superimposed signal model is an affine equivariant regional feature. The estimation of the characteristic scale is based on an accurate ...