Browsing by Autor "Gabriel Antonio Rojas Silva"

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    Design and Validation of an Autonomous IoT Collar for Bovine Monitoring in the Bolivian Altiplano
    (2025) Miguel Angel Silva Plata; Nayara Carminia Lara Ramos; Diego Samuel Guzmán Riveros; Sharly Marian Ballón López; Leyla Bionda Lipa Huari; Gabriel Antonio Rojas Silva
    This work presents the design and validation of an autonomous IoT collar for livestock monitoring in the Bolivian Altiplano. The device integrates motion, temperature, and environmental sensors into a compact platform powered by a solar energy system. A low-power wireless link enables continuous data transmission to a local gateway for remote visualization. The mechanical enclosure was 3D-printed with a bio-inspired internal pattern that improves impact resistance and overall durability. Compression, vibration, and water-resistance tests confirmed the structural reliability of the collar, while field trials demonstrated stable operation under real conditions. The embedded motionanalysis algorithm achieved a mean absolute error of 1.5 steps <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$(\mathbf{1. 1 {\%}})$</tex> and a correlation of <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$r=0.969\left(R^{2}=0.939\right)$</tex>, effectively distinguishing locomotion from non-advance movements. These results confirm the system's robustness and accuracy, which provides a low-cost solution for continuous livestock monitoring in remote rural areas.
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    MAMBU: A Bolivian Case of Response to Artificial Ventilators Shortage
    (2022) Fabio Richard Diaz Palacios; Jhon Ordoñez; Gabriel Antonio Rojas Silva; Miguel Angel Clavijo Quispe; Guillermo Sahonero-Alvarez; Rodrigo Ruben Botelho Oblitas; Juan Manuel Valverde Velasquez; Guillermo Enrique Manning Soria Galvarro; Renan Andres Espinar Saavedra; Anna Montevilla
    COVID-19 pathology is characterized by a variety of symptoms, from respiratory to cardiac and even neuronal affections. However, from all of these manifestations, lungs’ affection remains a focus of attention due to being considered as the main cause of death. Respiratory failure is treated using different strategies, but a very common practice is to provide respiratory support through artificial ventilation to patients. Unfortunately, due to the shortage of devices capable to offer such functionality, many patients are left unattended given that public healthcare systems’ resources are not enough - the Bolivian healthcare system was not the exception. This paper reports the approach followed to develop MAMBU which stands for Mechatronic Ambulatory Medical Breathing Unit, an automation system for AMBU-based ventilation designed to face the shortage of ventilation devices in Bolivia. A MAMBU device can be manufactured and assembled in a short amount of time, with a low cost and easy transportation. Furthermore, it includes control schemes to manage the respiratory frequency, I:E ratio, PEEP, and FiO2. The device was validated through instrumental testing and in-vivo procedures following Bolivian current regulations. The results obtained show that the device is safe for human usage as well as relatively reliable (around 7% of error).