scientific american - 1999 04 - endless space (maybe not)

... million Americans with us.” —Glenn Zorpette News and Analysis Scientific American April 1999 47 Copyright 199 9Scientific American, Inc. GEMINI: A NEW EYE OPENS ON THE HEAVENS Mapping the Shape of Space ENDLESS ... New Eye Opens on the Cos- mos,” on page 104] . Subaru, the Japa- nese word for the Pleiades star cluster, boasts the planet’s largest single-piece mir- ror, an 8.3-met...

Ngày tải lên: 12/05/2014, 15:56

... down- loading music from the Internet in the May issue. News and Analysis Scientific American July 1999 41 CYBER VIEW On-Line U. DAVID SUTER Copyright 1999 Scientific American, Inc. Life’s Far-Flung ... into women-belong-back-in-the-kitchen ar- guments. And popular how-to books such as Men Are from Mars, Women Are from Venus, with their tenuous ties to evolutionary biology and thei...

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... (212) 35 5-0 408. Index of articles since 1948 available in electronic format. Write SciDex™, SCI- ENTIFIC AMERICAN, 415 Madison Ave- nue, New York, N.Y. 1001 7-1 111, or fax (212) 35 5-0 408. Photocopying ... as patchy as the calico cat herself. ÑJohn Rennie 30 SCIENTIFIC AMERICAN April 1993 Copyright 1993 Scientific American, Inc. 32 SCIENTIFIC AMERICAN April 1993 I f atom...

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... charge-density wave or a spin-antiparallel (or “singlet”) superconducting state results. CHARGE-DENSITY WAVE SPIN-DENSITY WAVE SPIN-UP ELECTRON HOLE SPIN-DOWN ELECTRON Copyright 1994 Scientific American, ... in re- SCIENTIFIC AMERICAN April 1994 53 CHARGE AND SPIN DENSITIES of electrons are shown in nor- mal metals, charge-density waves and spin-density waves. The spin-up (orange ) and...

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... —Steven Vames NATIONAL AERONAUTICS AND SPACE ADMINISTRATION Copyright 1995 Scientific American, Inc. 24 SCIENTIFIC AMERICAN April 1995 T he more than one million alco- holics in this country who seek treatment ... ÑSasha Nemecek 26 SCIENTIFIC AMERICAN April 1995 U ntil recently, many medical in- vestigators believed the AIDS vi- rus remains more or less dor- mant in asymptomatic...

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... (212) 98 0-8 175 or call (800) 77 7-0 444. Scientific American- branded products avail- able. For free catalogue, write Scientific Ameri- can Selections, P.O. Box 11314, Des Moines, IA 5034 0-1 314, or ... trapped in amber yield 25-million-year-old DNA Copyright 1996 Scientific American, Inc. L ast October a jury in Reno, Nev., ordered Dow Chemical Com- pany to pay Charlotte and Mar...

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... objective: or- ange-throated males beat out blue- throats, blue-throats overpower yel- low-striped throats and yellow-striped throats checkmate orange-throats. These relations have generated a six- year ... 77 7-0 444. Scientific American- branded products available. For free catalogue, write Scientific American Selec- tions, P.O. Box 11314, Des Moines, IA 5034 0-1 314, or call (800) 77...

Ngày tải lên: 12/05/2014, 15:08

... ZUKIN Copyright 1997 Scientific American, Inc. ice sheet. Clarke’s writing, though fic- tion, builds on a very real sense of excite- ment in the scientific community: imag- es from the Galileo spacecraft ... 29 Copyright 1997 Scientific American, Inc. I t has been said that “Internet secu- rity” is an oxymoron. Privacy, ac- countability and restricted infor- mation, the argument goes, are...

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... the competing cable-modem Internet ser- vice, offered in the same area by Cox Communications. U S West is also offer- ing higher-speed ADSL services aimed at businesses; a 70 4- kilobit-per-second connection ... Now, as Tama- gotchis, the most famous brand of virtual pet, become the rage for girls, the lessons are shifting. “The transition is from objects-to-think-with to objects-to-nurture,”...

Ngày tải lên: 12/05/2014, 15:35

... and Analysis44 Scientific American January 1999 CYBER VIEW Out of Site DAVID SUTER Copyright 1998 Scientific American, Inc. Revolution in Cosmology Scientific American January 1999 45 A t a conference ... observations of cosmic expan- sion during the following decade, most scientists Surveying Space- time with Supernovae 46 Scientific American January 1999 Surveying Spa...

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