Improving HIV Therapy John G. Bartlett and Richard D. Moore Infections with HIV, the human immunodeficiency virus that causes AIDS, continue to sweep the world. Cures and vaccines remain elusive, although the search goes on. Whatever its cause, depression ultimately emerges from biochemical shifts in the brain that provoke aching sadness, loss of pleasure, guilt, thoughts of death and other symptoms. The search for those neurological underpinnings is intensifying and raising the prospects for better therapies. The weird attributes of quantum mechanics might allow computers to solve otherwise impossibly hard problems.
Magnetic manipulation can turn molecules in a liquid into computing such devices.
Prototypes have already been built. In Japan between the 17th and 19th centuries, everyone from peasants to samurai solved geometric proofs and offered up the solutions to the spirits. Some of their answers provide clever alternatives to Western mathematics. Laser Scissors and Tweezers Michael W. Berns Finley focused beams of laser light can push, pull or slice tiny objects. Investigators are now using laser scissors and tweezers to manipulate chromosomes and other structures inside cells.