Ground water contamination depends on porosity, permeability and overburden thickness of the geological formations. The ability of the subsurface rock to filter impurity before percolating into aquifer as a measure of overburden materials have been examined in this study. Vertical electrical sounding method using schlumberger array was employed in this study the result was used in calculating the longitudinal conductance and consequently the protective capacity. The study discovered six geo-electric layers of Top soil, Clayed soil, Lateritic soil, weathered layer, Fractured Basement and Fresh Basement in the study area. The top soil is low resistivity between 0.8 Ωm to 33.2 Ωm and thickness of 0.2 m to 2.4 m. Clayed soil underlay Top soil; the resistivity is between 2.6 Ωm to 81.8 Ωm with 1.4 m to 43.9 m thickness......

KEYWORDS: Contaminants, Aquifer, Underground water, Overburden, Longitudinal Conductance.

The friction stir welding (FSW) process was applied in two dissimilar materials: 316L stainless steel and F82H structural steel, using butt joints to observe its effects on microhardness, mechanical properties and microstructure. Plates of 600x200x4mm3 were used to measure the microhardness profile on the Vickers HV0.5 scale, following the ASTM E-92 standard. For the tensile tests, samples were manufactured according to the ASTM E8M standard. These tests were carried out in a 10 Tn Universal Instron Machine. The welding parameters were: Joint M1= F82H (AS) - 316L (RS) (300rpm and 75mm/min); Joint M2 = 316 (AS) – F82H (RS) (300 rpm and 75 mm/min); Joint M3= F82H (AS) - 316L (RS) (400rpm and 100mm/min); Joint M4 =16 (AS) – F82H (RS) (400 rpm and 100 mm/min)......

KEYWORDS: Friction Stir welding; welding parameters; mechanical properties; microhardness.

The objective of this paper is to investigate the effect of cutting tool wear on burr formation. When comparing machining, forging, and casting, shearing is mostly known in heavy industry for mass production as a very cheap and fast way to get the desired shape of the product. Recently, however, shearing has also been transferred to light industry to produce electronic components. The appearance of burrs on the cutting edge is usually unavoidable by cutting a part from sheet metal. Burrs not only reduce the accuracy of the product, but also cause further cost increases in the deburring process. In this paper, the effect of the cutting tool on burr formation is investigated by using the experimental approach. The experimental results show that the effect of wear on the functional parts of the cutting tool such as the shear and shearer have a great influence on the formation and size of burrs.

KEYWORDS: cutting,cutting gap, burr, wear.

This article deals with the 3D simulation of deep drawing steel DC04 with a thickness of 0.7 mm along with die load analysis of a deep drawing punch made from tool steel X16CrNiSi25-20. In numerical simulation of deep drawing process Barlat and GMT models were used. The simulation of the technological process is a key factor in engineering production in terms of efficiency, cost savings or inprediction of errors. In this paper, the basic outputs of deep drawing will be evaluated such as effective plastic strain, thinning, equivalent stress and contact pressure of a punch with the use of Simufact forming software.

KEYWORDS: deep drawing, DC04, die load analysis, FEM, Simufact

The mathematical methods offered by mathematical morphology are mainly oriented towards problems in image or signal processing and analysis as well as other fields such as artificial intelligence, pattern recognition, and soft computing. Since mathematical morphology is a combined geometric and algebraic framework, its basic operations can be defined on sets and numerical functions whenever their underlying algebraic structure is a complete lattice. The fundamental idea behind the morphological approach is to transform a given set or a function by means of simple structuring elements into another set or function that preserves the essential chracteristics of the source set or function in such a way as to make easier its analysis or interpretation in the case of real world applications.........

KEYWORDS: lattice algebra, lattice computing, mathematical morphology, numerical function evaluation.

This article presents an approach to the semi-analytical treatment of the heat conduction problem applied to a multilayer material. At its interface (especially if its thermal conductivities are of very different orders of magnitude), the ``barrier effects'' are felt more intensely in the solution, impacting it in terms of its derivability at the point of contact. The proposal to use the Laplace transform to, in this space, obtain the analytical solution to the problem and then use the inverse numerical transform to obtain results, aims to introduce greater reliability in the response data in the interface region between the materials, given how the transform acts on discontinuities.

KEYWORDS: heat conduction problem, inverse Laplace transform, numerical methods, diffusion phenomena, composite materials, Fourier's law, partial differential equations