October 2007

Diversifying Nigeria’s Petroleum Industry

The petroleum industry in Nigeria has brought unprecedented changes to the Nigerian economy, particularly in the past five decades when it replaced agriculture as the cornerstone of the Nigeria economy. The oil industry has risen to the commanding heights of the Nigerian economy, contributing the lion share to gross domestic product and accounting for the bulk of federal government revenue and foreign exchange earnings...

Author(s): Aigbedion, I and Iyayi S.E

October 2007

The effects of petroleum exploration and production operations on the heavy metals contents of soil and groundwater in the Niger Delta

Soil and water samples obtained from four sampling points; around an oil well head, flare site, waste pit and effluent discharge point in an exploration area in the Niger Delta were analysed for their heavy metals contents. The results showed that the amount of lead present in the soil ranges from 3.40 – 99.40 mg/kg, copper values were in the range of 5.10 – 49.30 mg/kg, Nickel concentration vary...

Author(s): Asia, I. O., Jegede, S. I., Jegede, D. A., Ize-Iyamu O. K. and Akpasubi E. Bernard

October 2007

Covariance transformations for flame-propagation modeling

The covariance transformation used in earlier theoretical studies of turbulent-flame and isothermal-front propagation is defined and mathematically derived. This transformation provides the covariance associated with fluctuations of a turbulent scalar or vector-component variable in terms of the statistical properties of another fluctuating scalar or vector-component variable when the Fourier transforms of the two...

Author(s): R. C. Aldredge

October 2007

Effect of the rotation matrix factorization on the quality of images rotation

Most efficient algorithms for rotating 2D images are based on the succession of three translations, following the lines, then the columns and the lines of the image again (LCL). These translations result from the decomposition of the rotation matrix into a product of an upper triangular matrix, a lower triangular matrix and an upper triangular matrix (ULU). We have shown in this paper that the decomposition of the...

Author(s): Bitjoka Laurent and Boukar Ousman