Abstract: The four-level nested neutral-point-clamped (4L-NNPC) inverter is a competitive topology among the various medium-voltage multilevel converters, and its main issue is flying-capacitor ...

Question of the Day (2025): A good “Question of the Day” can transform your morning school assembly into an engaging and enriching learning experience. It encourages students to think beyond textbooks ...

Donald Trump reveals plan to tackle energy bills for millions Healthiest red meats to eat — and how a cardiologist says to prepare them Aaron Rodgers on criticism of Steelers HC Mike Tomlin: 'That's ...

As 2025 comes to a close, we’re looking back at some of our biggest moments of the year. We shared our vision for personal superintelligence, broke ground on cutting-edge AI data centers, strengthened ...

The U.S. has recorded 17 mass killings so far in 2025, the lowest number since 2006, according to a long-running national database tracking such incidents. The database, maintained by The Associated ...

The US military carried out a strike Thursday on a suspected drug boat in the Eastern Pacific, killing four people on board, according to a social media post from US Southern Command. “Southern Spear ...

Hello, tech editor Alexei Oreskovic, pitching in for Allie. We’ve been enjoying some crisp blue-sky days here in San Francisco in true December fashion. For the folks at OpenAI however, the days have ...

The past 11 months have been a lot as 2025 reaches its conclusion this December. From incredible TV shows, wild viral moments, and unbelievable news stories, this year has truly seen it all, with the ...

Tesla’s Robotaxis, which CEO Elon Musk promised there will be millions of roaming the streets by next year, have now crashed four times in a single month. According to updated filings from the ...

Votebeat is a nonprofit news organization reporting on voting access and election administration across the U.S. Sign up for our free weekly newsletter to get the latest. A federal judge on Monday ...

BERLIN—Germany will build a database of young people detailing their fitness, aptitude and outlook to help it pick whom to draft should the country be attacked. The proposed move, a step toward ...