During a sleep study, wires attached to the head monitor brain waves that reveal which stage of sleep a person is in.

WSJ: More Children With Sleep Problems Seek Overnight Tests

When I went on stage I could see my slides in the monitor in front of me, but not my presenter notes.

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According to the Global Entrepreneurship Monitor (GEM), the level of early stage entrepreneurship activity in Turkey in 2010 was 8.6 percent.

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