2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/200152We consider models built on $AdS_5\otimes S^5/Γ$ orbifold compactifications of the type $IIB$ superstring, where $Γ$ is the abelian group $Z_n$. An attractive three family $\mathcal{N}=0$ SUSY model is found for $n=7$ that is a modified Pati--Salam Model which reduced to the Standard Model after symmetry breaking.8 pages, 1 figure, Phenomenology section revised to correct renormalization group equations, typos correctedHigh Energy Physics - Phenomenologytext