In the present work we give some sufficient conditions to obtain a unique almost automorphic solution to abstract nonlinear integral equations which are simultaneously of advanced and delayed type and also a unique asymptotically almost automorphic mild solution to abstract integro-differential equations with nonlocal initial conditions, both situations are posed on Banach spaces. Also, we develop a Bohr-Neugebauer type result for the abstract integral equations. Before that, we introduce the notion of ?-bounded functions, develop the appropriate abstract theory and discuss the almost periodic situation. As applications, we study the existence of an asymptotically almost automorphic solution to integro-differential equations modeling heat conduction in materials with memory and also the existence of the almost automorphic solution to semilinear parabolic evolution equations with finite d...

El trabajo que se realizó, tuvo por objeto realizar un estudio sobre el fenómeno migratorio juvenil que se presenta en el distrito de Pampas - Tayacaja. La investigación es descriptivo - analítico basado en el método etnográfico, el cual nos ha permitido acopiar información in situ sobre el tema de estudio. Se ha recurrido a técnicas antropológicas de soporte como la observación participante y los estudios de casos de vida, los cuales nos han permitido profundizar en la comprensión de los motivantes educativos del emigrante. La población estuvo constituida por estudiantes de ambos sexos del último grado de educación secundaria procedentes de 03 instituciones educativas. Todos fueron encuestados. Los resultados demostraron que la educación es el principal motivo de emigración juvenil en el distrito de Pampas- Tayacaja.

This study was funded by Consejo Nacional de Ciencia y Tecnolog ??a (CONCYTEC).We wish to thank Dr. Peter Schantz for manuscript review and the people and authoritiesof the farming cooperative of Tupac Amaru in Junin, Peru.

This research was supported by FONDECYT, Chile Grant 1140785, Postdoctoral Grant 3050046 and CONICYT Chile (Beca de Apoyo a Tesis Doctoral), Morris Animal Foundation (D05LA-002), Darwin Initiative for the Survival of Species (United Kingdom) 1312 grant 162/06/126, The British Embassy (Lima), NERC 1313 (United Kingdom) grant GST/02/828, and Newton Fund Researcher Links Travel grant (ID: RLTG9-LATAM-359537872) funded by the UK Department for Business, Energy and Industrial Strategy and CONCYTEC (Peru) and delivered by the British Council.