Particulate matter 1µm (PM) dataset collected by low-cost sensors in residential and industrial areas at the neighborhood level.

The incursion of low-cost sensors (LCS) for monitoring particulate matter in different fractions of particles (PM, PM, and PM) allows the characterization of the concentration levels of specific sources or events, including the analysis of ultrafine fractions (PM). Several studies have documented adverse effects on human health due to exposure to PM, such as morbidity and mortality from respiratory, cardiovascular, and, in some cases, carcinogenic diseases. Hence, studying the concentration levels and the sources that cause PM is imperative.

Low-Cost Online Monitoring System for the Etching Process in Fiber Optic Sensors by Computer Vision.

The present research exposes a novel methodology to manufacture fiber optic sensors following the etching process by Hydrofluoric Acid deposition through a real-time monitoring diameter measurement by computer vision. This is based on virtual instrumentation developed with the National Instruments technology and a conventional digital microscope. Here, the system has been tested proving its feasibility by the SMS structure diameter reduction from its original diameter of 125 μ until approximately 42.