Harmony Search Algorithm is a mimetic algorithm inspired on the process of musicians to create one harmony. It has been tested in many theoretical and real problems with good results. The objective of this work is to test the evolutionary algorithm with classical n-dimensional benchmark functions (Ackley, Schwefel) with a dimensionality of thousands to analyze the behaviour in this context. The results have showed the limitation of this metaheuristic with problems of higher dimensionality.

Tropical high-mountain permafrost has a unique thermal regime due to its exposure to strong solar radiation and to rough surface snow morphology, which reduce ground heat transfer from the surface. Latent heat transfer and higher albedo that occur during the snow-covered season contribute to positive feedback that supports the presence of permafrost. This preliminary study reports on the thermal state characteristics of tropical mountain permafrost in Peru. This work also evaluates the potential combined impact of the El Niño–Southern Oscillation (ENSO) in the mountain permafrost of the Coropuna and Chachani volcanic complexes, both located at the western edge of the southern Peruvian Altiplano. Temperature monitoring boreholes were established at 5,217 m at Coropuna and 5,331 m at Chachani, and electrical resistivity was surveyed in both sites. This 7-year discontinuous record of per...