资讯

Richmond Times-Dispatch16 小时
Schools relying on digital surveillance find security still takes a human touch
America’s educators have been turning to technology — especially digital surveillance — to screen for students who might harm ...
Readers Write: Trans athletes, funding for the outdoors, ‘Hands Off’ protests
Strib Voices publishes letters from readers online and in print each day. To contribute, click here. President Donald Trump’s ...
Interesting Engineering1 天
New perovskite solar cell retains 85% efficiency after operating for 1,000 hours at 185°F
With the initial efficiency of 25.56%, the solar cell retained 85% of its efficiency despite operating for upto 1,000 hours ...
Interesting Engineering1 天
Two-stage plasma trick helps electron beams behave better in tiny accelerators
Scientists from Germany's DESY have come up with a two-stage correction approach to speed up electrons just like they do with ...
The Citizen1 天
Trump administration says it will exclude some electronics from 'reciprocal' tariffs
The move could help keep the prices down for popular consumer electronics that aren’t usually made in the U.S.
Austin American-Statesman5 天
Student project: 'We see gun violence everywhere.' What schools are doing to keep schools safe
In Columbus and around the nation, school staff members are faced with the threat of gun violence. According to the Centers for Disease Control, more than 7% of high school students have been ...