scientific american - 2002 02 - tv - are you addicted

... control. contents february 2 002 SCIENTIFIC AMERICAN Volume 286 Number 2 features 44 Microarrays yield medical profiles www.sciam.com SCIENTIFIC AMERICAN 5 Copyright 2 002 Scientific American, Inc.Copyright 2 002 Scientific ... been wanting to try POWER-LINE NETWORK ADAPTER POWER OUTLET POWER-LINE NETWORK SCIENTIFIC AMERICAN 41 Copyright 2 002 Scientific Ame...

Ngày tải lên: 12/05/2014, 16:11

... short-reach, micro- laser-based transmitter-receivers —includ- ing those in local-area networks —will in- crease from $262 million in 1999 to $14 billion in 2009, according to market re- searcher ... the infrared, at the 1.3 1- and 1.55-micron wavelengths need- ed for medium- and long-range telecom- munications. The big technical glitch re- lates to the spacing of atoms in the crys- tal la...

Ngày tải lên: 12/05/2014, 16:07

... SciDex™, SCI- ENTIFIC AMERICAN, 415 Madison Ave- nue, New York, N.Y. 1001 7-1 111, or fax (212) 35 5-0 408. Photocopying rights are hereby grant- ed by Scientific American, Inc., to li- braries and ... ÒAchieving Elec- tronic Privacy,Ó by David Chaum; SCIEN- TIFIC AMERICAN, August 1992]. Two programsÑand two almost dia- metrically opposed viewpoints embod- ied in them are competin...

Ngày tải lên: 12/05/2014, 14:48

... in Central Europe oÝer a guide to appro- priate American tank strength. Ger- many deploys almost 4,000 top-of-the- line tanks, which are as good or better than the Þnest American tanks. France and the ... with the newest aircraft types: the F-117 Stealth Þght- ers, F-15s and F-16sÑAmericaÕs top-of- the-line ÞghtersÑand the sturdy A-10 ground-attack airplane. Marine and navy aviation uni...

Ngày tải lên: 12/05/2014, 14:50

... eastern Austra- lia is increasingly be- ing sought by real-es- tate developers. Koalas have come to live cheek-by-snout with people moving into coastal areas pop- ulated with the ani- malsÕ prized ... rates, they are not just contesting the coe - cients for their equations. They are de- bating which narrative style best de- scribes the economy. And in econom- ics, as in other sciences,...

Ngày tải lên: 12/05/2014, 15:00

... we think will in- terest you. If you would like your name excluded from these mailings, send your request with your mailing label to us at the Harlan, IA address. E-mail: SCAinqui- ry@aol.com. Copyright ... 77 7-0 444. ScientiÞc American- branded products available. For free catalogue, write Scien- tiÞc American Selections, P.O. Box 11314, Des Moines, IA 5034 0-1 314, or call (800)...

Ngày tải lên: 12/05/2014, 15:04

... Boeing 609 will actu- ally be an updated version of the exper- imental, 1970s-era XV-15, which was a test-bed for a military tilt-rotor known as the V-22 Osprey. The V-22’s devel- opment program, ... Yellowstone Na- tional Park area and in south-cen- tral Alaska. “Our research is con- cerned with what happens to prey in systems where large carnivores are absent,” he told a group of re- port...

Ngày tải lên: 12/05/2014, 15:20

... Brooklyn,” Math re- calls. “I told him, You have a very typi- cal finding on your x-ray, this swelling in front of your kneecap. It’s referred to as housemaid’s knee.’” A period of si- lence followed, ... under an encephalitis watch. “If you face into the wind,” Borgia ad- vises this slap-happy reporter, “the mos- quitoes will gather on your lee. You can keep them off your face.” Flaming...

Ngày tải lên: 12/05/2014, 15:33

... murder weapons ever: the 10-kilometer-wide (six- mile-wide) asteroid that wiped out the di- nosaurs 65 million years ago. Kyte found the tiny fossil, about as big as the end of a felt-tip pen, while sifting ... many: the pop quiz. If you are one of those amazing devotees of the magazine who know its pages inside and out, the fol- lowing should be fun for you. If you re a more casual rea...

Ngày tải lên: 12/05/2014, 15:53

... not merely compare prices but levels of serv- ice —they may even choose new prod- ucts for you based on knowledge of your preferences. For example, he pre- dicts, you might tell your agent you want ... sepa- rated thousands of salt-grain-size for- ams from their muddy mass grave us- ing a tiny paintbrush. Her search re- vealed that 55 percent of the species of deep-sea forams had disapp...

Ngày tải lên: 12/05/2014, 16:01