scientific american - 2003 10 - artificial muscles

... Per 100 black-black marriages: 8.1 HISPANIC-WHITE MARRIAGES Per 100 white-white marriages: 4.0 Per 100 Hispanic-Hispanic marriages: 32.6 NATIVE AMERICAN WHITE MARRIAGES Per 100 white-white ... marketplace. contents october 2003 SCIENTIFIC AMERICAN Volume 289 Number 4 features www.sciam.com SCIENTIFIC AMERICAN 5 52 Robot walks using artificial muscles COPYRIGHT 2003...

Ngày tải lên: 12/05/2014, 16:18

... mil- lion person-days of restricted activity, 65 million person-days of chest discom- fort, 100 million person-days of head- ache, 120 million person-days of cough- ing, 180 million person-days ... Ross 28 SCIENTIFIC AMERICAN October 1993 BUGS INSIDE BUGS: Raœl J. Cano and an amber-clad, bacteria-laden insect. STEVE STARR SABA Copyright 1993 Scientific American, Inc. O ne might expec...

Ngày tải lên: 12/05/2014, 14:50

... 330 REDSHIFT 0.50 DENSITY 0 .10. 01 RELATIVE ABUNDANCE 1.0 1.0 10 -2 10 -4 10 -6 10 -8 10 -1 0 HELIUM HELIUM 3 LITHIUM DEUTERIUM Copyright 1994 Scientific American, Inc. would still be detectable in the existing universe. D espite ... DNA POWERED, HEAVIER- THAN-AIR FLIGHT THEORY OF RELATIVITY COMMUNICATIONS SATELLITE TRANSISTOR Copyright 1994 Scientific American...

Ngày tải lên: 12/05/2014, 14:58

... diphtheria-tetanus-pertussis and mea- sles-mumps-rubella are required for public school ad- mission. The chicken pox vaccine may join the list. JOHN CHIASSON Gamma Liaison Copyright 1995 Scientific American, ... Liaison DAN BURTON Copyright 1995 Scientific American, Inc. keen appreciation that magnetic con- taminants were common in the labora- tory. They could even be traced to fac- to...

Ngày tải lên: 12/05/2014, 15:02

... pursuits ranging from can- cer to mental health is the Office of Al- ternative Medicine ( OAM). The OAM administers a $7.48-million-a-year pro- gram to assist the medical establish- ment and the public ... nostrums, potions and electro- magnetic-field generators. Wayne B. Jonas is the tall, athletic- looking, 41-year-old head of the OAM. His job —and that of about a dozen oth- er NIH employee...

Ngày tải lên: 12/05/2014, 15:15

... Mobility60 Scientific American October 1997 0 10 20 30 40 50 60 70 80 90 100 100 10, 000 100 ,000 AVERAGE INCOME PER PERSON (1985 U.S. DOLLARS) SHARE OF TRAFFIC VOLUME (PERCENT OF PASSENGER-KILOMETERS) 1,000 WESTERN ... organi- zations. Within those top-level do- mains, second-level identifiers distin- guish types of organizations. This thoughtfully structured system has been stable...

Ngày tải lên: 12/05/2014, 15:30

... Technology Ronald L. Rivest 95 98 106 110 116 1100 100 010 10 1100 1 0101 1001 100 0100 1 OF MESS GE KEY CIPHER Molecular prescription (page 17) Copyright 1998 Scientific American, Inc. of many smaller ... illustrated scientific articles, current issue highlights, ask the editors, our on-line store, subscrip- tions, e-mail, and other features not found in Scientific American,...

Ngày tải lên: 12/05/2014, 15:47

... pro- vide individual investors with the same sophisticated analysis tools used by pension-fund managers. The company launched its $60-a-year, consumer- advice service in June. Similar to large-scale weather ... testing, Financial Engines em- ploys simulation mod- els to forecast how a 401(k) portfolio is likely to perform un- der possible combina- tions of interest, equi- ty returns and infla...

Ngày tải lên: 12/05/2014, 15:59

... pace. His take-no-prison- ers wit and tidbits about the lo- cal environment spice the con- versation. (The Western Fuels As- sociation becomes the “Western Fools Association,” his long- standing ... been developed using the so-called Java Com- munity Process, overseen by representa- tives from IBM, Hewlett-Packard, BEA Sys- tems, Caldera, Apple and other compa- nies. Java is a “de facto” ......

Ngày tải lên: 12/05/2014, 16:05

... 2001 SCIENTIFIC AMERICAN Volume 285 Number 4 features 76 Flooding on the Gulf of Mexico Copyright 2001 Scientific American, Inc.Copyright 2001 Scientific American, Inc.Copyright 2001 Scientific American, ... of genes that may produce therapeutic pro- teins. McCormick thinks that the single-chain anti- bodies can be adapted easily to one-size-fits-all thera- pies, perhaps against...

Ngày tải lên: 12/05/2014, 16:10