scientific american - 1998 05 - six months in space
scientific american - 1998 05 - six months in space
... M. Grossman in Austin, Tex.News and Analysis Scientific American May 1998 45CYBER VIEWBringing Down the InternetDAVID SUTERCopyright 1998 Scientific American, Inc.For six months, at least ... pro-gram, including Hu Side, head of theChinese Academy of Engineering Phys-ics, and his deputy Du Xiangwan. Bothare “very strong arms-control advo-cates,” Cochran insists. An internation-al ... Krasnoyarskearly-warning radar in central Siberia.Now Cochran is try-ing to pull off the sametrick in China. He sayshe has developed “goodrelations” with a num-ber of in uential figures in the Chinese...
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scientific american - 2003 05 - infinite earths in parallel universes really exist
... are explained in terms of vi-brating strings. “The average physicist wasn’t into do-ing this—it was just so alien to them,” the 47-year-old38 SCIENTIFIC AMERICAN MAY 2003FOREST McMULLIN ProfileWired ... account.Relying on spam blockers has led to an es-calating e-mail-filtering arms race as UCE be-comes ever more evasive. Because construct-ing effective filters is time-consuming, thetrend ... ChoiRED LIGHT, GO: Light-emitting diodes stimulate plant growth in space and may also help repairtissue, including methanol-damaged retinas.COPYRIGHT 2003 SCIENTIFIC AMERICAN, INC.MAY 2003 $4.95WWW.SCIAM.COMHEARING...
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scientific american - 1998 10 - how hackers break in
... exactly how angiogen-esis inhibitors work, angiostatin is ex-pected to be tested in humans begin-ning late this year. (Several synthetic an-giogenesis inhibitors are already in clinical trials.)When ... he calls intervention: establish-ing standards and then measuring per-formance against them. Another highlyeffective technique—having subordi-nates take part in the decision mak-ing—was used ... solution:microneedles.These tiny nee-dles, made usingion-etching mi-crofabricationtechniques de-veloped for inte-grated circuits,are far thinnerthan a humanhair and leave prick marks about onemicron in diameter....
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scientific american - 1993 02 - beating resistance in superconductors
... aplomb.34 SCIENTIFIC AMERICAN February 1993RAYMOND GENDREAUCopyright 1993 Scientific American, Inc.Copyright 1993 Scientific American, Inc.ing to computers. A few scientists, in- cluding Stephen ... Healso works on his violin playing and veg-etable gardening. Huse has been primar-ily interested in the theory of phase tran-sitions in various materials, includingspin glasses. He received ... proteins incorporatingzinc Þngers have been identiÞed in diverse species, from yeast to humans. Sever-al laboratories have begun to decipher how these zinc-containing proteins selectand bind...
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scientific american - 1993 05 - building soft machines from smart gels
... NIAID an-nounced that it was Òaccelerating the tri-al design processÓ with the intention ofstarting clinical trials of convergent ther-apy during the spring. Initially the tri-als were to involve ... another way of maintaining a pa-tientÕs health until a cure can be found.The individual and combined side ef-fects of the drugs must also be takeninto account. In all combination thera-pies, as ... Presidentand Chief Financial OÛcer, R. Vincent Bar-ger; Vice Presidents: Jonathan Piel, John J.Moeling, Jr.8 SCIENTIFIC AMERICAN May 1993PRINTED IN U.S.A.Copyright 1993 Scientific American, Inc.Mathematics...
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scientific american - 1994 03 - visiting yourself in the past
... primerwalking. Their approach uses a libraryof hexamers (six- base primers) and aprotein that binds to single-strand ge-nomic DNA. The binding protein pre-vents individual hexamers from pairingstably ... abundances of the original miner-als in the peridotite. Some minerals,such as clinopyroxene, melt more easi-ly than do others and hence rapidly de-crease in abundance during the melt-ing. Moreover, ... productionby increasing the yield per hectare. Thenew, high-yielding strains of grainssuch as wheat and rice have proliferat-ed since their introduction in the 1960s,especially in Asia. To...
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scientific american - 1995 05 - what found the top quark
... MILLION1 IN 10 MILLION1 IN 1 MILLION1 IN 100,0001 IN 10,000Odds of any-thing happen-ing to onlyone person in the world atany timeOdds of any-thing happen-ing to onlyone person in the ... Stix1 IN 1 TRILLIONCHANCE OF AN EVENTOCCURRING1 IN 100 BILLIONWoman be-ing killed by ahusband orlover1 IN 10 BILLIONDrowning in a tub Beingkilled bylightningCopyright 1995 Scientific ... be in for a rudeshock. Europeans long ago learned tocope with diÝering national preferenc-es in everything from cheese to wash-ing machines. But on-line services arenew territory, dominated...
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scientific american - 1995 11 - guardian cells in the brain
... 1995 Scientific American, Inc.When computer diagnosticianAngela Bennett (played by San-dra Bullock) disabled a main-frame computer with a virus-infecteddisk slipped into a Macintosh in thispast ... com-pletely outside of it.Ó The whirring ma-chine splintered, spewing blood ontothe walls, carpets and window, where itmerged into the sunset. ÒI screamedagain and again. Slowly the hallucina-tions ... paid by high -in- come couples but left middle-and low-income ones essential-ly unchanged. She found that in households earning more than $130,000a year, the proportion of women in thelabor...
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scientific american - 1996 05 - the comets' lair
... technology.“Treating each systems acquisition asa separate [technological] solution,”Strassmann testified in a Senate hear-ing, “has resulted in thousands of unin-tegrated, hard-to-maintain, impossible-to-manage, ... Italy;telephone: 3 9-2 -7 60 0-1 104; fax: 3 9-2 -7 60 0-3 719.Further ReadingHidden Killers: The Global Problem with Uncleared Landmines: AReport on International Demining. Political-Military Affairs ... occur in remote areas withoutmedical facilities and so are not docu-mented. In a mined area, many every-day activities—gathering wood or food,drawing water, farming, playing, tend-ing livestock—become...
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scientific american - 1997 05 - the 100 - year weather forecast
... typicallynow made by a laborious hit-or-miss procedure that involves in- jecting genes into eggs and breed-ing the few animals that take upthe genes. Cloning should expe-dite the rapid generation ... complica-tions and respi-ratory symp-toms. Neurologi-cal, psychiatricand ophthalmicdiseases werealso most preva-lent among themost heavily ex-posed. In an ac-companying pa-per, the Interna-tional ... cappuccino. —Steve MirskyMICHAEL CRAWFORDCopyright 1997 Scientific American, Inc.On a warm and clear Februaryafternoon, I am cruisingsouthern California’s Foot-hill Freeway in a one-of-a-kind...
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