in this paper we investigate a nonlinear evolution model described by the rosenau-kdv equation. we propose a three-level average implicit finite difference scheme for its numerical solutions and prove that this scheme is stable and convergent in the order of o(τ2 + h2). furthermore we show the existence and uniqueness of numerical solutions. comparing the numerical results with other methods in...

in this study, a numerical model was developed to investigate the two-dimensional heat transfer in a homogenous finite cylinder to predict the local temperature and sterilizing value during caviar pasteurization. a fixed grid finite difference method was used in the solution of heat transfer equations according to crank-nicolson’s scheme. the model was validated by comparison of the experimenta...

This study was conducted to assess the prevalent effect of organochlorines insecticide residues on randomized population sample from El-Hosh Town community, South Gezira. 36 human urine samples such as 12 from male, 12 from female and 12 from children were collected from randomized population samples. Residues of organochlorine pesticides were extracted by hexane and analyzed by gas chromatogra...

Analyses of patient delays in seeking treatment for tuberculosis (TB) provide useful evidence for national TB control programmes. The objectives of this study in Gezira State, Sudan were to estimate the extent of, and factors associated with, pulmonary TB patient delay in accessing care. A cross-sectional phase was conducted to determine the length of delay, followed by a nested case-control ph...

1University of Gezira, Wad Medani, Sudan. 2University of Khartoum, Khartoum, Sudan. New Halfa Hospital, New Halfa, Sudan. Received: 09/10/02; accepted: 14/09/03 ABSTRACT We carried out a prospective, randomized, controlled clinical trial to evaluate the clinical efficacy of ceftriaxone and ampicillin/cloxacillin prophylaxis in decreasing the frequency of post-caesarean section infection-related...