scientific american - 2003 11 - strings and spacetime with 11 dimensions

... Alzheimer’s. COPYRIGHT 2003 SCIENTIFIC AMERICAN, INC. NOVEMBER 2003 W ith its multiple dams, flood-con- trol mechanisms and crop-irri- gating structures, the Rio Grande has provided residents of Col- orado, ... enigmatic. contents contents november 2003 november 2003 SCIENTIFIC AMERICAN Volume 289 Number 5 features features www.sciam.com SCIENTIFIC AMERICAN 5 74 Dmanisi sk...

Ngày tải lên: 12/05/2014, 16:18

... between ATAMS and convention- al systems is that it will be updated ev- News and Analysis Scientific American August 1997 33 TECHNOLOGY AND BUSINESS COMMAND AND CONTROL Inside a hollowed-out mountain, ... postage. E-mail: editors@sciam.com Advertising correspondence should be ad- dressed to Advertising Manager, Scientific American, 415 Madison Avenue, New York, NY 1001 7-1 111...

Ngày tải lên: 12/05/2014, 15:29

... OBSERVATORY Wolf-Rayet 104 News and Analysis20 Scientific American June 1999 L unar Prospector is not an impres- sive-looking spacecraft. Shaped like a soup can with its ends cut off, the 295-kilogram (650-pound) orbiter ... brain and to distin- guish white and gray matter there; xe- non passes across the blood-brain bar- rier (producing anesthesia and eupho- ria). Even though x...

Ngày tải lên: 12/05/2014, 15:57

... mid-1920s the sys- tems had become reliable and, with the emer- gence of oil-fired furnaces, more convenient. Natural gas, which became widely avail- able with the building of a pipeline infra- structure ... self-organized into eukary- ote cells, which self-organized into multicellular organisms, which self-organized into and here we are. Self-organization and emergence arise out of c...

Ngày tải lên: 12/05/2014, 16:15

... temperatures and pressures on Mars’s sur- face and flow down slopes, leaving streaks with tell- tale features in its wake. — Sarah Graham www.sciam.com SCIENTIFIC AMERICAN 23 COPYRIGHT 2003 SCIENTIFIC AMERICAN, ... 2003 SCIENTIFIC AMERICAN, INC. 20 SCIENTIFIC AMERICAN FEBRUARY 2003 SAMUEL VELASCO (top); UNIVERSAL SAFETY RESPONSE, INC. (bottom) news SCAN W orld War II...

Ngày tải lên: 12/05/2014, 16:16

... 1995. YELLOWSTONE RUMBLINGS 111 W N 110 .5 W 110 W 44.5 N 45 N Norris Geyser Yellowstone Lake West Thumb Upper Geyser Norris Geyser Yellowstone Lake West Thumb Upper Geyser Day 11/ 04/02 11/ 08/02 11/ 12/02 11/ 16/02 11/ 20/02 SMALL ... COPYRIGHT 2003 SCIENTIFIC AMERICAN, INC. 36 SCIENTIFIC AMERICAN MARCH 2003 INTERNATIONAL CENTER FOR NEUROLOGICAL RESTORATION (CIREN) new...

Ngày tải lên: 12/05/2014, 16:16

... mass of well-trained scien- tists, state-of-the-art instruments, and collaborations with important academic groups,” Dixon says. Al- though other bioinformatics companies exist, Meta- nomics joins ... EARTH MUON- OR TAU-NEUTRINO ELECTRON- NEUTRINO ELECTRON- NEUTRINOS DAYTIME RESULTS NIGHTTIME RESULTS ELECTRON- NEUTRINOS CREATED ELECTRON- NEUTRINO MUON- OR TAU-NEUTRINOS ACTUAL DATA OF A CA...

Ngày tải lên: 12/05/2014, 16:16

... installing soundproofing. A one-inch- thick panel of wood stops certain sound frequencies, but a similar-size sandwich comprising a quarter-inch- thick piece and a three-quarter-inch piece stops more frequencies.” ... NAVY AGAINST THE LAW COPYRIGHT 2003 SCIENTIFIC AMERICAN, INC. 30 SCIENTIFIC AMERICAN MAY 2003 SAMUEL VELASCO news SCAN deep space probes have sampled trespassing du...

Ngày tải lên: 12/05/2014, 16:17

... the 250,000-pound thrust engine prototype as part of a $20-million program. COPYRIGHT 2003 SCIENTIFIC AMERICAN, INC. 24 SCIENTIFIC AMERICAN JUNE 2003 news SCAN A fter the September 11 attacks, ... soon disappeared,” Casa- grande says. Some of the Iraqi scientists were ea- ger to exchange information with out- siders and might launch into a discus- sion with Casagrande about...

Ngày tải lên: 12/05/2014, 16:17

... Telescope visible-light data (red and green) and Chandra X-ray Observatory data (blue). Odd Couple 7,500 LIGHT-YEARS COPYRIGHT 2003 SCIENTIFIC AMERICAN, INC. Yet black holes are not all-powerful. Even ... interspersed with liquid-crystal “droplets” whose optical response can be controlled by ap- plying a voltage. The fabrication be- gins with a soup of mon- omer molecules and l...

Ngày tải lên: 12/05/2014, 16:18