| Table of contents Tecnura vol.25 no.69 Bogotá July/Sept. 2021 Research | | | | · Evaluation of Linear and Nonlinear Models for Transmission System Planning Using the GAMS Software Vargas Robayo, Carlos Yesid; Blanco Valbuena, Diego Felipe; Montoya Giraldo, Óscar Danilo; Giral Ramírez, Diego Armando
| | | | · Biodiesel production from almond oil extracted from the corozo Bactris guineensis assisted by direct probe ultrasound Madrid De la Rosa, Juan Martín; Mendoza Meza, Dary; Fontalvo Gómez, Miriam
| | | | · Mixed integer programming model for activities and personal planning on student academic chapter Rocha González, Jair Eduardo; Gutiérrez Sánchez, Hernando Alexander; Silva Riapira, Cindy Lorena
| | | | · Geomicrobiology for Deep Uranium Prospection in the Neuquina Basin, Argentina Scotti, Adalgisa; Rojas, Guillermo; Servant, Cristina Marcela; Catálfamo, Pablo; Valle Geologist, Nicolás,; Gómez, Martín Pedro
| | | Case Study | | | | · Cationic polyelectrolyte as a coagulant used to remove oils and fats from wastewater of a dairy industry Oñate Barraza, Hernando Carlos; Chinchilla Calderón, María Alejandra
| | | Research | | | | · EAFD Recycling Through Selective Zinc Leaching with Citrate Solutions: Comparison with an Inorganic Acid Borda, Johana; López, Fabián; Torres, Robinson; Parra, Mario
| | | | · Optimal Power Flow through Artificial Intelligence Techniques Hernández, César; Sánchez-Huertas, William; Gómez, Víctor
| | | | · Intelligent Rainwater Harvesting Prototype to Improve Residential Energy Efficiency in Bogota Ramírez-Escobar, Carlos Arturo; Buriticá-Arboleda, Clara Inés
| | | Review | | | | · A Systematic Review on Flipped Classroom and Collaborative Learning Supported in Artificial Inte lligence for Programming Learning Hidalgo Suárez, Carlos Giovanny; Llanos Mosquera, José Miguel; Bucheli Guerrero, Víctor Andrés
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