Radiation application in archaeology: Thermoluminescence dating

Matter, whether of biological or geological origin, if properly questioned, can reveal to us all its secrets about its genesis and the modifications it has undergone over long periods. In archaeology, objects of different materials store in their structures different types of physical signals (languages). These signals, when properly read with the right technique, can help us to reconstruct the whole history of such objects and their genesis. Thermoluminescence is a technique that allows reading a luminescence signal stored inside the matter of certain archaeological terracotta artefacts. This signal is of great interest for the determination of what we called the paleodose and therefore the age of the artefact. In this conference, we present this dating technique through the presentation of a practical work of archaeological dating carried out around the antic Roman city of Djémila, located at the northeast of Sétif. 

Effect of the pulsatile flow in heat and mass transfer in different geometries 

The aim of the present conference is to study analytically and numerically the heat and mass transfer mechanism between a laminar pulsatile flow in a different geometries. Numerical results obtained by a finite difference method indicate clearly how pulsation affects the rate of heat and mass transfer and how the phenomenon depends on the kinetic Reynolds number   . Computations are carried out for a kinetic Reynolds number range of  and the parameters of case in the presence of magnetic field with porosity.    , while the pulsation amplitude is fixed at a value   and the Prandtl number  . The results also showed that the for the low frequencies, the heat transfer is significant along the cylindrical wall, but for the high frequencies, the heat transfer does not change practically with the pulsations at the outlet of the annular space. On notes a good agreement between the analytical and the numerical methods.