Over the past decade synthetic jets have emerged as a promising means of active flow control. They have the ability to introduce small amounts of energy locally to achieve non-local changes in the flow field. These devices have the potential of saving millions of dollars by increasing the efficiency and simplifying fluid related systems. A synthetic jet actuator consists of a cavity with an osc...

Lightning, one of the most powerful forces in nature, once was mysterious, magical and feared as the great weapon of the Gods. Ancient Greeks feared lightning as it was believed to be hurled by Zeus, the king of the Gods. For the Vikings, lightning was produced by Thor as his hammer struck an anvil while riding his chariot across the sky. American Indians believed that lightning was caused by b...

We count points of fixed degree and bounded height on a linear projective variety defined over a number field k. If the dimension of the variety is large enough compared to the degree we derive asymptotic estimates as the height tends to infinity. This generalizes results of Thunder, Christensen and Gubler and special cases of results of Schmidt and Gao.