**Acknowledgements**

First of all, the author wishes to acknowledge with the numerous young students at any level (5yrs degree, MS and PhD) of the University of L'Aquila and coming from other Universities, which make realizable all the work synthesized in this chapter. Special thank goes to the coauthors of the above referenced publications produced at the University of L'Aquila, from which most of the material here presented is taken and re-arranged. Several research grants have permitted the development of the research such the MIVIS project financed by CARIS‐ PAQ, the RELUIS projects financed by DPC, the PRIN projects financed by MIUR, the RICOSTRUIRE project financed by the Development Italian Ministry.
