Even in homogenous soil and for simple geometrical structure the analytical design of a grounding system is a complex and not very accurate procedure. Using Finite Element Analysis (FEA) it can perform a precise design for complex grounding systems but with important hardware resources and time consumption. This paper proposes a methodology for power system grounding design, directed to ensure ...

Integration of an ultrasonically-based system for materials characterization and a hand-probe was demonstrated to have a large potential in detection of buried mines for the purpose of humanitarian demining. In the integration, the absence of interferences with the conventional, contact technique of hand-probe use was emphasized. The characteristics of buried mines severely restrict hand-probe ...

This study investigated strontium isotopes in the dental enamel of 32 human skeletons from Forte Marechal Luz sambaqui (shellmound), Santa Catarina, Brazil, aiming at identifying local and non-local individuals. The archeological site presents pot sherds in the uppermost archeological layers. Dental enamel was also examined from specimens of terrestrial fauna ((87)Sr/(86)Sr = 0.71046 to 0.71273...

We have observed superconductivity in thin films of (La, _xSrx),CuO, which are fabricated by implanting evaporated La/& multilayer films with Sr and annealing in oxygen. The films are insulating and partially transparent as-implanted, but they darken and become conducting at annealing temperatures as low as 500° C. The resistive behavior is very sensitive to the annealing conditions and the sup...

In order to investigate the nature of defects produced by ion irradiation through a heterostructure, a silicon-on-insulator substrate with a buried SiO2 layer at a depth of ;1.5 mm was irradiated. The implantation was done using 2 MeV Si ions in the dose range of 0.2– 1310 cm. The subsequent defect analysis was performed using the Au labeling technique. Besides the presence of an expected exces...

The principal objective of this work is to contribute to the development of effective remote autonomous mine countermeasure operations by providing pertinent flow, heat flux and sediment transport characteristics in the benthic boundary layer to missions engaged in sea mine reconnaissance and hunting. These environmental characteristics govern acoustic and light propagation, chemical and biogen...

The GISAXS intensity from buried Ge nanodots have been examined both by GISAXS/reflectivity measurements and also simulations with Distorted Wave Born Approximation (DWBA). The validity and the condition of using Born Approximation (BA) are discussed from the simulations based on the layer structures modelled from a reflectivity analysis. As expected in the previous kinematical analysis, use of...