scientific american - 2002 11 - when stars collide

... COMMON IN CERTAIN GALACTIC NEIGHBORHOODSBY MICHAEL SHARA WHEN STARS COPYRIGHT 2002 SCIENTIFIC AMERICAN, INC.COPYRIGHT 2002 SCIENTIFIC AMERICAN, INC.might well be the most dramatic. If the incoming ... earth is imaged, showing a magnetic-field disturbance (concentric rings) in the mantle.COPYRIGHT 2002 SCIENTIFIC AMERICAN, INC.26 SCIENTIFIC AMERICAN NOVEMBER 2002 SCIMAT/SCIENCE SOURCE/PHOTO ... and exhibit newdouble-relativistic effects. WHEN BASEBALLS AREDOUBLY SPECIALCOPYRIGHT 2002 SCIENTIFIC AMERICAN, INC.28 SCIENTIFIC AMERICAN NOVEMBER 2002 ALICIA CALLE newsSCANOn long road...

scientific american - 1993 11 - reading the genes of extinct species

... did not warrant reme-dial legislation or regulatory action.24 SCIENTIFIC AMERICAN November 1993COPYRIGHT 1993 SCIENTIFIC AMERICAN, INC.But the Six Cities Study directly ad-dressed such factors. ... fea-tures, he resembles a high-tech Buddha.Minsky is unable, or unwil-ling, to inhabit any emotionfor long. Early on, as predict-ed, he plays the curmud-geon. His only rival in grasp-ing ... countries that sanc-tion the use of purse-seine nets in tunaÞshing and of leg-hold traps in trap-ping. Such punishments seem an in-appropriate use of state power, howev-er. The values in...

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scientific american - 1994 11 - safeguarding computer networks

... GELSEROGROUP ANeisseriameningitidisIII-1I-1I-2I-3I-4I-5 I-6 I-7 I-8 I-9 II-1 II-2 II-3 II-4 III-2 III-3 III-4 IV-1 IV-2 IV-3 IV-4 CLONESSUBGROUP 4SUBGROUP 1SUBGROUP ... and mem-brane-bound lipooligosaccharides com-mon to N. lactamica and N. meningi-tidisÑmay confer immunity.This mechanism of immunity couldexplain the Þve- to 12-year intervals be-tween ... BISSAUKENYAETHIOPIASUDANEGYPTNIGERMAURITANIAMALINIGERIACHADTANZANIAZAIRESOMALIAERITREACopyright 1994 Scientific American, Inc.Copyright 1994 Scientific American, Inc.infection of Neisseria would be espe-cially susceptible because meningococ-cal strains from all over...

scientific american - 1995 11 - guardian cells in the brain

... capabil-ities of the applications in which theyare embedded: a word-processing mac-ro, for example, might use the search-and-replace function in conjunctionwith the word-counting command to ad-just ... GOLTZCopyright 1995 Scientific American, Inc.ond, but at the higher latitudesnow being monitored, its speedchanges abruptly to 750 kilo-meters per second. The bound-ary between the high- and low-speed ... tax-freemunicipal bonds to high-yield-ing taxable investments.Economists may get a slight-ly better handle on these points,thanks to the tax counterrefor-mation of 1993, which rescind-ed...

scientific american - 1996 11 - the origins of immunity

... theexecutive order’s “state-of-the-art” tech-nology exemption to the bulk declassi - cation rule. But that introduces anotherconcern. “The issue is, what does state-of-the-art technology mean?” ... ener-gy constantly to the balls, allowing rip-ples and other features to form at thesurface.Different patterns form as the vibra-tion is varied. When the powder is shak-en at about two-and-a-half ... People who used to live se-cluded in Welsh-speaking valleys or onNavajo-speaking mesas are now con-nected to English-dominated informa-tion on the airwaves and the Net. Uni-versal translation...

scientific american - 1997 11 - mercury's long, hot afternoon

... and dracun-culiasis (guinea worm), in which ingested larvae mature inter-nally and eventually burst through the skin. Water-related ill-nesses are also spread through food, hand-to-mouth contactor ... form a connection.OIL IN 4-DTime-lapse software boosts oil recoveryAPPLIED GEOLOGYCOURTESY OF JEAN-CLAUDE BRADLEYCopyright 1997 Scientific American, Inc.VIRUS-KILLING NETWORKS • PROVING ... coupled with dra-matic advances in computer power,made the old idea of incorporating tem-poral data into ﬂow models viable. In-deed, Lamont’s program, called Lam-ont-Doherty 4-D Software, is...

scientific american - 1998 11 - greenland's mysterious meteor - fire over the ice

... hours after they last heard from it,they reenacted one of those Tranquilli-ty-base-here-the-Eagle-has-landed,NASA-flight-control jubilation scenes.Laima is the Latvian goddess of goodfortune, ... interestedin them for use in bal-listic-missile intercep-tors; a space-based pro-jectile of less than akilogram could acceler-News and Analysis50 Scientific American November 1998DARPA ETO/CALIFORNIA ... OfﬁcerJohn J. HanleyCo-ChairmanRolf GrisebachPresidentJoachim P. RoslerVice PresidentFrances Newburg Scientific American, Inc. 415 Madison AvenueNew York, NY 1001 7-1 111 (212) 75 4-0 550PRINTED...

scientific american - 1999 03 - when venus erupted

... being per-formed by Monsanto—often with ad-miring publicity. In December, an up-roar swept India when rumors cir-culated that Mon-santo had insert-ed a “terminator”gene in its trans-genic ... AgencyStart ﬁdgetingCopyright 1999 Scientific American, Inc.News and Analysis28 Scientific American March 1999When dozens of rotting,headless, three-quarter-tonwalrus carcasses startedshowing ... worked on the small, high-pre-cision screens used in pocket-size com-puters and organizers.Today he supervises a variety of proj-ects. His mantra, printed 12 times con-secutively in his textbook...

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scientific american - 1999 11 - up, up and far away

... zero-g-simulating “Vomit Comet”FIELD NOTESRICHARD SHUNNARAHCopyright 1999 Scientific American, Inc.News and Analysis28 Scientific American November 1999Neural Fountain of YouthAge-related ... ex-periment in the intermittently weight-less cargo bay of the National Aeronau-tics and Space Administration’s gravity-beating KC-135A aircraft.The airplane, a military version of Boe-ing’s ... million addi-tional tons annually.Small people are justmore efficient.The same high-cal-orie, high-fat dietsthat promote chronicdisease are also prob-ably at least partly be-hind the...

scientific american - 2000 11 - the future of digital entertainment

... Hc-ARIPCNA/Gadd45Karp1P44P50P45P431 4-3 -3 oC11bP42P17P17P16P33P24P29P41p300P47P32P5P31News & AnalysisCopyright 2000 Scientific American, Inc.Egalitarian democracy made aspectacular American debut in1828, when ... devices communi-cate through a house-wide wireless net. Aradio-locating system can pinpoint anytagged object to within 10 feet. The two-gigabit-per-second connection to the uni-versity and ... television-radio-recorder-playback-facsimile-projector set that, in hindsight, suggests that we humans have a funda-mental desire to merge all media into one entity. Today this goal has a name: con-vergence,...

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