scientific american - 1999 12 - what science will know in 2050

... believe,something deeply satisfying in seeing the findings of mod- ern science scooped by a mere Roman- tic,almost two centuries earlier!” There is also something deeply satis- fying in, even for ... tumor proteins.Inject- ed into the patients,the proteins pro- voked an immune response;18 of 20 pa- tients remain in remission four years af- ter being vaccinated.Unlike previous vaccine t...

Ngày tải lên: 12/05/2014, 16:00

... for land-line quality. Longer-term gains may come from re- search into ways of canceling out inter- ference altogether. ÒThe base station is receiving signals from every user any- way,Ó Pottie points ... Africa, and four in Asia. Independent national sur- veys provide some data for six addi- tional Asian countries, including China, India and Bangladesh. These inquiries continue an interna-...

Ngày tải lên: 12/05/2014, 14:50

... market interest in apply- ing better technologies for cutting en- ergy consumption. Gasoline prices are at an all-time low. So manufacturers in- stead concentrate on applying engineer- ing advances ... cylinders, each dis- placing a certain volume. Expanding gas- es pushing on the piston produce pow- er. The combined volume for all the cyl- inders is termed engine displacement. A larger e...

Ngày tải lên: 12/05/2014, 14:59

... France-Presse Copyright 1995 Scientific American, Inc. A lthough the American population is stabilizing in number, it is bal- looning in mass. The epidemic in obesity continues to spread, now af- ßicting ... Stock Copyright 1995 Scientific American, Inc. for clinical trials, we will continue to re- Þne our understanding of what meth- ods will yield the best possible data...

Ngày tải lên: 12/05/2014, 15:00

... MILLION 1 IN 10 MILLION 1 IN 1 MILLION 1 IN 100,000 1 IN 10,000 Odds of any- thing happen- ing to only one person in the world at any time Odds of any- thing happen- ing to only one person in the ... AN EVENT OCCURRING 1 IN 100 BILLION Woman be- ing killed by a husband or lover 1 IN 10 BILLION Drowning in a tub Being killed by lightning Copyright 1995 Scientific Amer...

Ngày tải lên: 12/05/2014, 15:01

... shading in a picture, a problem that would otherwise involve an in- finite number of variables. Each of the remaining 147 heads in the database was reproduced to within 1 percent by com- bining ... succeeded in putting the taxpayersÕ money where its mouth is by pouring funds into mis- sile defense budgets. ÒI think the single biggest turnaround in Clinton administration defense poli...

Ngày tải lên: 12/05/2014, 15:03

... Utah Copyright 1996 Scientific American, Inc. T he turn-of-the-century stone building is rotting inside, floor- boards dusty and dilapidated, pigeons roosting in the eaves. There are no windows in the moldy ... easier-to-use work- stations based on off-the-shelf proces- sors increased in power, fewer buyers were willing to pay for relatively com- plex supercomputers based on custom Ne...

Ngày tải lên: 12/05/2014, 15:18

... tech- nological marvel into a winning race car. Imagine my surprise, then, when wan- dering through the crowd milling this September morning at the race site on Sand Hill Road, a gentle incline ... says, “they’re cheaper than the pump-and- treat operations that retain the chemi- cal.” Planting the trees involved little more than sinking foot-long cuttings — essentially sticks—into the ground....

Ngày tải lên: 12/05/2014, 15:32

... newer prod- ucts are 5-androstenedione, 4-andro- stenediol, 5-androstenediol, 1 9-4 -norandrostenedione and 1 9-5 -norandrostene- diol. (The Merck Index classifies 5-androstenediol and 1 9-5 -norandrostenediol as ... fat-regulating hor- mone is turning up in immune sys- tem cells and blood vessel linings ENDOCRINOLOGY PHOTO RESEARCHERS, INC. Copyright 1998 Scientific American, Inc....

Ngày tải lên: 12/05/2014, 15:50

... chem- istry of life while fending off attacks from soil-dwelling, non-car- bon-based organisms. The key was active watching —stopping the videotape and discussing the concepts; in this way, a single episode ... nonprofit or- ganization based in Pasade- na, Calif., a project called SETI@home. This venture in- vites the public to join in the search for extraterrestrial in- telligence....

Ngày tải lên: 12/05/2014, 15:51