Hot glue guns are pretty simple beasts: there’s an on/off switch, a heating element, and a source of current, be it battery or wired. You turn it on, and the heater starts warming up; ...

Abstract: Nowadays, DC (direct current) motors are widely used in industry. Air conditioners, computer drives, electric toothbrushes, portable vacuum cleaners, drilling machines, trimmers, food mixers ...

Abstract: The direct drive circuit breaker by permanent magnet synchronous motor is a new servo technology that can drive the moving contact to complete the opening and closing operation along the ...

The crash on Jan. 29 left 67 people dead. The U.S. government admitted some failures and accepted liability for its role in the deadly Jan. 29 mid-air crash over the Potomac River between a commercial ...

The US government now admits failures by the pilots of an Army Black Hawk helicopter and a controller in the Reagan National Airport tower during the January 29 midair collision over the Potomac River ...

Golfers play East Potomac's fifth hole as trucks unloads debris and soil from the demolition of the White House's East Wing on October 24. Tasos Katopodis / Getty Images Future control of Washington D ...