The memristor is the fourth fundamental element in the electronic circuit field, whose memory and resistance properties make it unique. Although there are no electronic solutions based on the memristor, interest in application development has increased significantly. Nevertheless, there are only numerical Matlab or Spice models that can be used for simulating memristor systems, and designing is limited to using memristor emulators only. A memristor emulator is an electronic circuit that mimics a memristor. In this way, a research approach is to build discrete-component emulators of memristors for its study without using the actual models. In this work, two reconfigurable hardware architectures have been proposed for use in the prototyping of a non-linearity memristor emulator: the FPAA (Field Programing Analog Arrays) and the FPGA (Field Programming Gate Array). The easy programming and reprogramming of the first architecture and the performance, high area density, and parallelism of the second one allow the implementation of this type of system. In addition, a detailed comparison is shown to underline the main differences between the two approaches. These platforms could be used in more complex analog and/or digital systems, such as neural networks, CNN, digital circuits, etc.

Concrete remains one of the most widely utilized construction materials, valued particularly for its exceptional compressive strength. However, exposure to fire can compromise both its internal microstructure and external integrity. This research investigates the behavior of concrete manufactured with recycled concrete coarse aggregate (RCA) derived from construction waste, aiming to establish experimental evidence of fire’s impact on compressive strength. We employed the Optimal Density Method to design mix proportions targeting 24 MPa compressive strength. The experimental program comprised 45 cylindrical samples distributed across three replacement levels: 0%, 15%, and 30% natural aggregate substitution with RCA. Following 28 days of curing, samples underwent direct fire exposure in a melting furnace. Temperature progression was monitored using a pyrometer, ranging from ambient (0 °C) through 250 °C, 400 °C, 600 °C, to 800 °C, with controlled exposure duration at each level. Three samples were tested at each temperature. After fire exposure, samples were cooled for 24 h at ambient temperature before compression testing. The densities of the fresh specimens were determined to be 2254.06 kg/m³ for HS-0AR%, 2210.09 kg/m³ for HS-15AR%, and 2180.85 kg/m³ for HS-30AR%, with a percentage density variation with respect to HS-0AR% of 1.95% and 3.25%, respectively. Finally, in relation to the compressive strength of concrete, a reduction of 4.34% was observed for 15% AGR and 5.72% for 30%, suggesting that the variations may be due to factors such as the water/cement ratio, the quality of the aggregate, and the curing conditions of concrete. In addition, several pathologies were observed, such as cracking, fissures, color changes, and spalling.

La geología ecuatoriana presenta afloramientos de zeolita natural, este mineral precioso se forma por los procesos volcanosedimentarios de muchos años y tienen propiedades excepcionales. Este trabajo presenta una investigación documental y de campo que permitió realizar un catastro que contiene información de 21 secciones donde se encuentran zeolitas naturales y mediante ArcGIS se realizó un mapa georeferenciado, ubicando estas secciones en la parte de la cordillera Chongón-Colonche que atraviesa la provincia del Guayas. En la parte norte de la cordillera por su geografía y accesibilidad se encuentran 15 secciones y en la parte sur encuentran las otras 6 secciones. Lo relevante es que solo 8 secciones se mantiene explotando zeolitas para aplicaciones reducidas al sector agrícola, ganadero y camaronero. Adicionalmente, a dos muestras de zeolita (ZC y ZR) extraída en roca en la sección ZN1, se realiza una caracterización geométrica mediante reducción de tamaño en la MAA y MTB, determinando que ZR presenta mayor dureza con respecto a ZC, y obteniendo mater fino para proyectos futuros sobre MCS.