Archive: 02/23/2011

Higher energy yield with torque vectoring gears

Wind turbines have a problem: Depending on the wind's force, the rotational speed of the turbine and thus of the generator changes. However, alternating current must be fed into the grid with precisely 50 (or 60) hertz. Typically ...

Feb 23, 2011
4.5 / 5 (8) 7 | with audio podcast

Designing a city for safe protests

Civil protests, from peaceful sit-ins at the Pentagon to violent riots in Cairo, nonetheless share some common characteristics. To study how protests evolve in public spaces, Dr. Tali Hatuka, an architect and head of Tel ...

Feb 23, 2011
1 / 5 (1) 0