While students are starting to regain academic ground, months of disrupted learning during the pandemic widened gaps between the highest- and lowest-performing students nationwide. Studies have found ...
Scientists have come a step closer to understanding how collisionless shock waves -- found throughout the universe -- are able to accelerate particles to extreme speeds. Scientists have come a step ...
Engineers focused on fast, light automation systems may pay too much attention to speed specs when acceleration is what really counts. Sponsored by Rollon Bearing speed is rarely the limiting ...
The typical log–log curves show the rate of cancer at different ages, and Frank began by plotting the slope of the rate curve at each point. This provides the age-specific acceleration of cancer — ...
当前正在显示可能无法访问的结果。
隐藏无法访问的结果