Multiple droughts can be a mixed bag for forests

Successive droughts are generally increasingly detrimental to forests, even when each drought was no more extreme than the initial one, according to new research. Drought is endemic to the American West along with heatwaves and intense wildfires. But scientists are only beginning to understand how the effects of multiple droughts can compound to affect forests…

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3 factors shed light on COVID-19 oxygen level mystery

Researchers have begun to solve one of COVID-19’s biggest and most life-threatening mysteries: how the virus causes “silent hypoxia,” a condition where oxygen levels in the body are abnormally low. Those low oxygen levels can can irreparably damage vital organs if gone undetected for too long. More than six months since COVID-19 began spreading in…

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Overcurrent Fault Detector

Advertisement The overcurrent fault detector presented here is a general-purpose current-consumption sensor circuit that raises an alert when the flow of current through the system exceeds a certain limit. This simple circuit is based on ACS712 Hall Effect-based linear current sensor chip. The author’s prototype is shown in Fig. 1. Fig. 1: Author’s prototype wired…

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Automatic Hand-Wash Timer

Advertisement According to the World Health Organization (WHO) guidelines, people need to wash their hands with soap and water at least for 20 seconds to get rid of any virus. Although you have a stopwatch on phones, wristwatches, and other electronic devices, it is not convenient to use them. Also, some people do not want…

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