Brushless dc motors have the advantages of high reliability and smaller size, but the absence of brushes can pose challenges. One challenge is the requirement for electronic commutation and control, ...

There’s a technique in cognitive-behavioral therapy called the Downward Arrow. When a client shows signs of a self-limiting or negative belief in the way they talk about themselves or a situation, a ...

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...