The embattled leader of STEP Academy, one of Minnesota’s largest charter schools, agreed to resign, just a few days after he tried shifting the blame for the school’s financial crisis to the nonprofit ...

Abstract: Real-time precipitation retrieval is crucial for timely warnings of extreme weather events such as heavy rain or floods. Geostationary satellite observations combined with machine learning ...

Abstract: To save the volume and cost in medium-voltage distribution networks, transformerless hybrid modular multilevel converters (HMMCs) will work under overmodulation conditions. However, the ...