| Table of contents ing. vol.25 no.1 Bogotá Jan./Apr. 2020 Editorial | | | | · Nuevas Expectativas de Mejora a Pesar de las Dificultades Diaz A., Nelson Leonardo
| | | Research Articles | | | | · Topologies for Battery and Supercapacitor Interconnection in Residential Microgrids with Intermittent Generation Narvaez, Alexander; Cortes, Camilo; Trujillo, Cesar
| | | | · Intelligent Interaction Model of the Regulations of the Congress of Colombia for Mobile Devices Pinzón Ortiz, Jesús E.; Espinel Ortega, Álvaro; Ramos, Olga Lucía
| | | | · FRand: MATLAB Toolbox for Fuzzy Random Number Simulation Figueroa-García, Juan Carlos; Tenjo-García, Jhoan Sebastian
| | | | · Conceptual Design or a Plant of Extraction of Saponins Presents in the Fique`s Juice Velásquez-Flórez, Mario Alonso; Vélez-Salazar, Yesid
| | | | · Extracts From Salvia Officinalis and Sambucus Peruviana H.B.K. Leaves as Scale Inhibitors Castillo Campos, Luis; Barreto, Steevenson
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