Research article

• Experimental Analysis of Power Quality in LED and CFL Lamps Under Cyclic Switching Regimes

  Rubén Darío Tirira Chulde , Zandro Jheron Villalva Tamayo

  1 - 15

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• Design and construction of a low-cost acoustic measurement tube for material evaluation: methodology and structural validation

  Nancy Piedad Rodríguez Sánchez, Galo Marcelo Tapia Estrella, Giovanni Javier Hidalgo Castro

  16 - 25

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• Physicochemical Characterization and Production of an Agro-livestock Compost as a Sustainable Alternative for Soil Fertilization in Tropical Areas of Esmeraldas, Ecuador

  Paulina Jessenia Colobon Realpe, Alfredo Lesvel Castro Landin

  26 - 34

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• The Test of the Signs for the same small sample

  Arabel Moraguez Iglesias, Roberto Johan Sierra Pérez, Mabel del Pilar Espinosa Torres

  35 - 49

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