scientific american - 1998 06 - liquid computers

... cruisewarped space-time in a souped-up De-Lorean. But in reality, traveling into thepast—though not impossi-ble under the laws of phys-ics—would prove incredi-bly difficult. Princeton Uni-versity ... 27Copyright 1998 Scientific American, Inc.News and Analysis28 Scientific American June 1998 Ancient Cosmology In southern Egypt’s Sahara Desert at asite called Nabta, scientists have discov-ered ... hit-to-kill intercep-tors conducted since the ear-ly 1980s, only six hits havebeen scored. Recent testingof the most sophisticated sys-tem yet produced, the The-ater High Altitude Area De-fense...

scientific american - 1993 06 - tuning in the radio signals of ancient galaxies

... a herd of pathogen-free pigs?Ó Soon-Shiong asks. He is notjoking. ÑPhilip E. Ross SCIENTIFIC AMERICAN June 1993 23Copyright 1993 Scientific American, Inc.26 SCIENTIFIC AMERICAN June 1993dded ... based on mannuronic acidand guluronic acid: M-blocks and G-blocks,Ó Soon-Shiong notes. ÒM-blocksstimulate interleukin-1 and tumor ne-crosis factors; G-blocks do not.ÓThe workers were able to ... particular v-SNARE that pairsit with a t-SNARE found only on the ap-propriate target membrane.” In the pres-ence of NSF and SNAPs, interactions be-tween the right v-SNAREs and t-SNAREsmay...

scientific american - 1994 06 - was there a race to the moon

... Canada. Long-term monitoring is needed to track changes.SARAH LEEN MatrixCopyright 1994 Scientific American, Inc. SCIENTIFIC AMERICAN June 1994 33In 1939 a 33-year-old French mathe-matician ... up-down action oversome unit of time.Schršdinger managed to extract clas- SCIENTIFIC AMERICAN June 1994 45Copyright 1994 Scientific American, Inc.sical behavior from his theory for a har-monic ... function [see upper right il-lustration on next page].Classical arguments explain the pres-ence of the bump. The quantum-me-chanical state is analogous to an en- SCIENTIFIC AMERICAN June 1994 47REACHING...

scientific american - 1995 06 - the world's strongest magnets

... storebookkeeper in Þve-and-dime stores. Thebookkeeper would receive the moneyand send back the change. Tubes re-placed Òcash children,Ó 1 0-, 1 1- and 1 2- year-olds who were exploited to per-form this ... GEORGE NIMHCopyright 1995 Scientific American, Inc.26 SCIENTIFIC AMERICAN June 1995groups looked very diÝerent.Ó Both sex-es had equally activated the left pre-frontal cortex, but the women ... assump-tions may be subverted. Modern ßight-less birds in South America and Africa,for instance, are assumed to have an80-million-year-old common ancestorin the southern supercontinent Gond-wana....

scientific american - 1996 06 - the space station

... objective: or-ange-throated males beat out blue-throats, blue-throats overpower yel-low-striped throats and yellow-stripedthroats 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 7-0 444. E-mail: info@sciam.comPhotocopying ... spon-sor of the new aerostat program.Speciﬁcally, the Pentagon is develop-ing aerostats to spot cruise missiles: re-mote-controlled air-craft packed withexplosives and di-rected by sophis-ticated...

scientific american - 1997 06 - the microchip that rewires itself

... 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 7-0 444. E-mail: info@sciam.comPhotocopying ... mellifera) are re-sponsible for pollinating up to $10-bil-lion worth of apples, almonds and oth-er crops every year, a far more valuableservice than their simultaneous produc-tion of $250-million ... deﬁned en-deavors. —Gary StixNews and Analysis38 Scientific American June 1997calls to mind Matrix Churchill Ltd., aBritish-based machine-tool companythat Iraq purchased in 1987 and subse-quently...

scientific american - 1998 01 - flying over the solar system

... ParisNews and Analysis40 Scientific American January 1998 A NAKED MAN: Lévi-Strauss amongthe Nambikwara of Brazil in 1938.COURTESY OF CLAUDE LÉVI-STRAUSS Copyright 1997 Scientific American, Inc.In ... Analysis28 Scientific American January 1998 several weather stations that his atmo-spheric team has deployed around theﬂoe. The machine bristles with high-techgadgets: a Doppler wind-speed sensorhangs ... him as a pick-me-up be-fore his ﬁnal oral exam, he grad-uated third in his class. “I ap-peared before the jury lookinglike death,” he recalled in a1988 interview, “without hav-ing been able...

scientific american - 1998 02 - wrapping up the universe

... PhotoCopyright 1998 Scientific American, Inc.While at Los Alamos National Labo-ratory in 1990, Lucas studied how shockwaves could be broken down into high-er-frequency components, or harmon-ics. ... practical in high-perfor-mance microprocessors. Like CMP,electroplating also has pre-20th-centuryantecedents. It serves as another in-stance in which retro-tech now contrib-utes to advances ... ibis.STEVE MIRSKYFOOD AND DRUG ADMINISTRATIONCopyright 1998 Scientific American, Inc.News and Analysis24 Scientific American February 1998 Blowing across the lip of a bottleto produce that...

scientific american - 1998 03 - inside a virtual human

... OF C. CARILLIIAN WORPOLECopyright 1998 Scientific American, Inc.News and Analysis26 Scientific American March 1998 Moore says he and his colleagues dem-onstrate this with liposomes suspendedin ... Copyright 1998 Scientific American, Inc.the article reached the de-sired level of unclarity,”he chuckles. After he re-vealed the hoax, Sokal re-calls, he received a lot ofe-mail from “people ... issue of Social Text (1996).32 Scientific American March 1998 Copyright 1998 Scientific American, Inc.Last July, Edward W. Campion, a deputy editor at the New Eng-land Journal of Medicine, madea...

scientific american - 1998 04 - the unwired world

... Analysis Scientific American April 1998 21BEHIND-THE-KNEE LIGHT PADSwere used to manipulate the biological clocks of volunteers.INSTITUTE FOR CIRCADIAN PHYSIOLOGY Copyright 1998 Scientific American, ... Scientific American April 1998 ALFRED T. KAMAJIANELECTRONX-RAY RADIATIONHEAT DETECTORPOLYETHYLENEFIBER BLANKET469-FOOT DIAMETER(MAXIMUM)HELIUM-FILLEDHIGH-ALTITUDE BALLOONPROTONTWO-COIL ... Web.Cosmic AntimatterALFRED T. KAMAJIANSACopyright 1998 Scientific American, Inc.Post-Polio Syndrome42 Scientific American April 1998 Post-Polio SyndromeDecades after recovering much of their...

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