| Table of contents Tecnura vol.24 no.63 Bogotá Jan./Mar. 2020 Editorial | | | | · Editorial GARCÍA-UBAQUE, CÉSAR AUGUSTO
| | | Research | | | | · Proposal for multiple spectrum access in cognitive wireless networks Hernández Suárez, César Augusto; Rodríguez García, Jorge; Peña Medina, Harold
| | | | · Characterization of drilling stages in multilayer specimens through the Acoustic Emission generated during the drilling process Ferrari, Guido Claudio; Gómez, Martín Pedro
| | | | · Expansion analysis of a microgrid in a non-interconnected zone González Cely, Daniel Nicolás; Muñoz Rincón, Alejandro; Bueno López, Maximiliano
| | | Reflection | | | | · Collective intuition and alternative statistics to hit Fonseca Zárate, Carlos Hildebrando; Garcia Ubaque, Juan Carlos; Garcia Benitez, Paula Fernanda
| | | Case Study | | | | · A vision of a sustainable city from the Construction and Demolition Waste (CDW) management model case study: Barranquilla Pacheco Bustos, Carlos Albeiro; Sánchez Cotte, Edgar Humberto; Páez, Carolina
| | | | · Analysis of non-revenue water in the urban supply system of the municipality of Facatativá, Colombia Bueno-Herrera, Diego; Monroy-Ávila, Edison; Zafra-Mejía, Carlos
| | | | · Critical flow in open channels: Numerical solution using the Newton-Raphson method for Android 4.0 application Moreno, Édgar Orlando Ladino; García-Ubaque, César Augusto; García-Vaca, María Camila
| | | Review | | | | · Robotics platforms for the construction sector: A review Becerra Mora, Yeyson Alejandro
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