International Journal of Engineering and Applied Science

Improvement of the Usefulness of Particle Size Distribution Analysis for Well Design

Elhag A. B — Tue, 31 May 2022 00:00:00 +0000

The classification of soils according to the mechanical (sieve) analysis do not change and the difference between results of circle and curves methods are insignificant (negligible). In this sense, the circle analysis is considered to be a significant technological advancement towards grain size distribution of aquifer materials. It should also be pointed out that further studies on the determination of slot size and gravel pack by using circle method are needed to make more reasonable judgments for utilization of circle analysis in hydrogeology and civil engineering. A new novel for measuring the particle size distribution of aquifer was conducted to compare the results obtained from sieve analysis depending on old methods (retained and passing).

Impact of Urbanization on the Reduction of Vegetation and Loss of Arable Land in the Environment Around Gombe

*L.A. Mbaya, G. O. Abu1, Y.C. Makadi, D.M. Umar — Tue, 31 May 2022 00:00:00 +0000

One of the major problems arising from urbanization is thus vegetation degradation. It is a decline in the quantity and quality of the grasses, herbs and woody species found in an ecosystem. Vegetation degradation as defined by Conacher and Sala, (1998), “is the temporary or permanent reduction in the density, structure, species composition or productivity of vegetation cover". Vegetation condition is the key aspect of degradation in grasslands, wood/forest lands and croplands. Thus, over exploitation and management practices may result in vegetation degradation and tend to enhance land degradation risk. Pressure on the natural vegetation has arisen from changing agricultural practice, fire and livestock grazing, and the feed-back with the loss of bio-diversity. The study has shown that the vegetation of Gombe state is undergoing degradation at an unsustainable rate which may likely disrupt the ecological functioning of the ecosystem in the state. Therefore, the study recommends that urgent attention on conservation of remaining vegetal resources in order to preserve the valuable assets of flora and fauna which are indigenous to the area. This can be done by insuring strict compliance with rules and regulations guiding conservation in the region and Nigeria as a whole also efforts should also be geared towards enlighten of the communities on the benefits of vegetation and the need for conservation in the ecosystem.

Simulation of the Impact of Crustal Structure on Hydrocarbon Exploration from Aeromagnetic Data

I Obi Kholina — Tue, 31 May 2022 00:00:00 +0000

The implications of the increased number of intrusives is that generated hydrocarbons might be converted to gas, this is more likely in areas around Calabar Flank, Mamfe basin and Anambra basins, given the high number of occurrence of intusives within these areas. whereas areas around the Niger Delta and Lower Benue Trough with significantly increased depth and lower number of intrusive are less proned to excessive heat from the intrusive and may produce more oil. The study support futher exploration activities within the Niger Delta and Lower Benue Trough areas. The significance of this study is the wide range appraisal of the basin architecture and configuration of the offshore and inland basins in Southern Nigeria. The Niger Delta basin areas of Portharcourt, Bonny with sediment thickness of about 8.0km and less intrusives remains the most viable area for exploration of hydrocarbons. The Bansara area within the Mamfe basin has (2.6km) sediment thickness that could generate hydrocabonsgiven that other condition are favourable, but the presence of numerous intusives may makes the area prone to excessive heat and may produce more gas than oil. The Anambra basin and the Lower Benue Trough have moderate depth of sediments thickness (2.5km) and less number of intrusives, this make these areas second to the Niger Delta among the studied basins for good prospects in hydrocarbon exploration investigations.

A Practical Guide to the Best Hardware for Molecular Dynamics Simulations: A Comparison of Molecular Dynamics Software Performance Using the Gromacs Package as an Example

Wadesango C. J. — Tue, 31 May 2022 00:00:00 +0000

Our comparative performance analysis of molecular dynamics software (using the popular GROMACS package as an example) provides the guidelines for selection of the best-performing GPU-based architectures for both all-atom and coarse-grained MD simulations of realistic molecular systems. It also outlines certain limitations of the single-node workstations and highlights the importance of the HPC platforms (e.g., “Lomonosov-2” supercomputer) for the simulations of large systems exceeding ca. 200,000 particles on the relevant time scale. These data can be used as the practical guidelines for choosing optimal hardware for molecular dynamics simulations.