Jamie Tyler was stressed. He had just endured a half-hour slog through airport security and needed some relief. Many travelers in this situation might have headed for the nearest bar or popped an aspirin. But Tyler grabbed a triangular piece of gadgetry from his bag and held it to his forehead.
As he closed his eyes, the device zapped him with low-voltage electrical currents. Within minutes, Tyler said, he was feeling serene enough to face the crowds once again.
