scientific american - 1996 08 - the electronic wallet
scientific american - 1996 08 - the electronic wallet
... users of conven-tional cellular phones.SAMICHAEL GOODMANCopyright 1996 Scientific American, Inc. The Stellar Dynamo46 Scientific American August 1996 Copyright 1996 Scientific American, Inc. ... nature show at the Web site whose address the produc-News and Analysis30 Scientific American August 1996 CYBER VIEW The Notworking ComputerDAVID SUTERCopyright 1996 Scientific American, Inc.ers ... to e-mail ad-dresses—fax to the number, and the document, including graphics and signa-tures, will appear in the recipient’s e-mail in-box. Received as a compressedgraphic bit-map file, the...
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scientific american - 1996 01 - the diet - aging connection
... in Warsaw in 1 908. Turn-of -the- century Poland was a peas-ant nation with a veneer of sophisticat-ed city gentry. RotblatÕs parents wereJewish; his father was in the paper-trans-port business. ... transform their experiment into the quantum eraser, the researcherstagged one of the photons of the pair(speciÞcally, the one created by the la-serÕs direct passage through the crys-tal). That ... developed coun-tries, many of which are strug-gling to electrify. The panel, as-sembled by the American NuclearSociety, also chided the U.S. gov-ernment for halting its breeder re-search. Then,...
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scientific american - 1996 05 - the comets' lair
... Among the most com-mon mines in this group are the Italianscatterable mines TS-50 and SB-33 and the hand-laid VS-50 and VAR-40, the U.S made M14, and the Chinese Type72. Typically, these weapons ... Space Adminis-tration unveiled the X-36 the first high-performance jet withno tail at all. Remotely controlled and powered by a cruise-mis-sile engine, the 5.4-meter-long, 600-kilogramscale ... case. The type of mine, the specifics of itsoperation, its position on the ground, the position of the victim and the char-acteristics of the environment at the ex-plosion site all affect the...
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scientific american - 1996 06 - the space station
... the impact of urban agriculture con-tinues to broaden, the notion of the gar-den city the turn-of -the- century dreamof urban centers lined with trees and or-namental plants—may take on a new ... datafrom the probe’s 57-min-ute descent did not chal-lenge the prevailing hy-pothesis of the evolutionof the solar system and itslargest planet, according to RichardYoung of the National ... elemental abun-dances (or the lack thereof), measure-ments of the brisk Jovian winds havepermitted slightly more conclusive the- ories about the planet’s meteorology. Be-fore the probe plunged,...
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scientific american - 1996 11 - the origins of immunity
... protected under the executive 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 ... risk factors may affect the expres-sion of the disorder,” the group con-cludes in the Journal of the American Medical Association. The lead author of the study, the larg-est of its kind ever ... psychology at the University of Liverpool,and other academics haveruffled a few well-groomedfeathers in the staid linguis-tics community. Their gos-sip-grooming hypothesis as-serts that our...
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scientific american - 1999 08 - the oxygen project
... forms the 0 and 1 of the de-vice the absence or presence of one ex-tra Cooper pair in the finger, which isthen called a single-Cooper-pair box. The researchers test that their devicehas the ... peas-ant family to care for the three-and-a-half-year-old Mario.For a while, things went aswell as they could in the mid-dle of a war. On the farm, the boy watched the wheat harvestand would ... fun-damental flaw in the au-tomobile black box busi-ness remains the quality of the available information. The skeletal data about the car leave virtually un-told the story of the weaklink: the driver....
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scientific american - 1996 12 - traces of the big bang
... UtahCopyright 1996 Scientific American, Inc.The turn-of -the- century stonebuilding is rotting inside, floor-boards dusty and dilapidated,pigeons roosting in the eaves. There areno windows in the moldy ... leishmani-asis is being conducted, and the “pep-tideria,” where the synthesized peptidesthat form the basis of the malaria vac-cine are stored. He also points out myr-iad other labs and the entrance ... Princeton Uni-versity who served on a panel that re-viewed the security implications of the NIF for the Department of Energy. Al-though the panel members had con-cerns about the facility, they did...
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scientific american - 2000 08 - global warming - the hidden health risk
... Oklahoma-northern Ark-ansas-southern Missouri, the north-ern part of the lower Michiganpeninsula and most of the na-tion’s coastal areas. —Rodger Doyle (rdoyle2@aol.com)RODGER DOYLE The U.S. ... more malleable,” Owren theorizes. In the same way, when the men in the experiment laughed the most with other men,they were probably honoring the age-old tradition of the buddysystem, reinforcing ... government.”Even the small community of lobster and abalone fishermenon the island realizes the long-term problem of the goats. Al-though they enjoy an occasional goat barbecue, they have seenmuch of the...
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scientific american - 1993 01 - the turbulent birth of the milky way
... 4,40012-BILLION-YEAR-OLD AGE TRACK15-BILLION-YEAR-OLD AGE TRACKNGC 288NGC 362Copyright 1992 Scientific American, Inc.means that within the halo the only re-maining main-sequence stars are the extremely ... declines as the reefs get farther awayfrom two centersÑone in the Indo-Pa-ciÞc and the other in the Caribbean. The outlines of a map marking plum-meting diversity coincide with the con-tours ... chemistriessuggest they were the Þrst to be creat-ed after the big bang have the same ageto within 500 million years of one an-other. The ages of other clusters, how-ever, exhibit a greater spread.The...
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scientific american - 1993 08 - can particles move faster than light
... Witten com-ments. ÒThey also donÕt attempt to con-vey the importance of the ideas of phys-ics in mathematics.ÓJaÝe and Quinn have their support-ers. Richard M. Schoen, a mathematicianat the Institute ... two infraredones. The two photons are emitted si-multaneously, and the sum of their en-ergies exactly equals the energy of the parent photon. In other words, the col-ors of the photon pairs ... of these photons,whereas the other is allowed to ßy un-impeded. Most of the time, the Þrst pho-ton bounces oÝ the barrier and is lost;only its twin is detected. Occasional-ly, however, the...
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