Introduction: Mapping the type and distribution of hydrated mineralogy is one way to track the aqueous history of Mars. Sulfates are a potentially good tracer of past climate because they form by aqueous processes , so their presence, volume, and process of formation can characterize how much water was available. The sulfates in Valles Marineris (monohydrated Mg or Fe sulfate and polyhydrated s...

This paper proposes a method to find gold deposits in the Eastern Desert of Egypt. Different methods including various classification methods, principle component transform (PCT), band ratios, and a constrained energy minimization technique are evaluated for their performance for hydrothermal alteration zone mapping. First, these techniques are carried out to highlight known gold deposits over ...

In today’s environment of shrinking resources, and consistent need for accurate inspections, simulation software is an effective cost cutting tool. CIVA is an advanced NDT simulation software dedicated to modeling ultrasonic (UT), radiographic (RT) and eddy current (ET) inspections without the need for physical test sample or inspection equipment. Each inspection module is comprised of simulati...

Since the beginning of the nineties, the CEA (the French Atomic Energy Commisssion), with developing the CIVA NDT expertise platform is greatly involved in the development of simulation tools. Over the years, and with successive versions of CIVA, the results of modeling research work have been being integrated into the software both for ultrasonics and Eddy current techniques. In order to fullf...

Collaboration networks provide a method for examining the highly heterogeneous structure of collaborative communities. However, we still have limited theoretical understanding of how individual heterogeneity relates to network heterogeneity. The model presented here provides a framework linking an individual’s skill set to her position in the collaboration network, and the distribution of skill...

In a recent publication on experimental haemarthrosis in the rabbit we described many interesting ultrastructural changes that occur in the synovial membrane (Roy and Ghadially, 1966). Two such changes attracted our attention: an increase in the number of intermediate and Type B synovial cells, and the occurrence of many small and large vesicles containing fiocculent and granular material. Howe...

By inducing two-photon absorption within the active layer of a 28nm test chip, we demonstrate nonlinear laser-assisted device alteration and single-event upsets by temporarily perturbing the timing characteristics of sensitive transistors. Individual qualitative and quantitative evaluations are presented for both techniques, with lateral resolutions demonstrated with sub-100nm performance. A si...