scientific american - 2000 03 - what computers are learning from them
scientific american - 2000 03 - what computers are learning from them
... continued from page 22
ANTI GRAVITY
C-A-T-T-T-T-T-T-T-T
T
he fog comes on little cat feet,”
wrote Carl Sandburg. The great
poet and historian may merely have
been attempting to animate water va-
por, ... THERAPY
HEART-BYPASS grafts may last longer with
pressure-driven gene therapy.
ROGER RESSMEYER Corbis
Copyright 2000 Scientific American, Inc.
MARCH 2000 $4.95 www.sciam.com
Compute...
scientific american - 2000 09 - muscles & genes are star athletes born, not made
... of vol-
unteers to perform an array of cognitive
tasks while they were exposed to simu-
lated cell-phone emissions from head-
sets. The emissions had no apparent ef-
fect on short- or long-term ... HAZARDS
Five-year-old
10-year-old
Adult
CELL-PHONE ENERGY penetrates
more deeply into a child’s brain than an
adult’s, as shown in these models.
Copyright 2000 Scientific American, Inc.
Scie...
Tài liệu Golf in the Year 2000, or, What we are coming to pdf
... Fiction
Source: http://www.golf-in-the-year -2 000. com/golf2000/index.html
1
“My good friend,” he said, still smiling, “you forget you are in the year
2000, and can travel from one end of Great Britain ... sort of magnet be-
hind our jackets which attracted them, but at the same time did not allow
them to come nearer than the twelve feet before mentioned. Of course
you could go up to...
scientific american - 1993 03 - black holes and the centrifugal force paradox
... the bending of light.
.
Copyright 1993 Scientific American, Inc.
SCIENTIFIC AMERICAN March 1993 75
Copyright 1993 Scientific American, Inc.
78 SCIENTIFIC AMERICAN March 1993
hree tubes built around ... more than 200,000 are de -
cient. Some are merely obsoleteÑbuilt
in a time of smaller vehicles and nar-
rower roadsÑbut the rest, for one rea-
son or another, are incapab...
scientific american - 1994 03 - visiting yourself in the past
... AMERICA
ICELAND
HOT-SPOT
AREA
AZORES
HOT-SPOT
AREA
MID-ATLANTIC
RIDGE
Copyright 1994 Scientific American, Inc.
conditions in the mantle where the
sample rocks formed, because the tem-
peratures and ... sublima-
tion) and then analyze everything that
comes out. Their results look quite a
bit diÝerent from those of their col-
leagues. A 35,000-year-old ice sample
from the Greenland Ice-S...
scientific american - 1995 03 - can science cure crime
... CRAWFORD
Copyright 1995 Scientific American, Inc.
G
etting rid of the long-lived, ra-
dioactive by-products of nucle-
ar power is a problem that has
stalked the industry for its 40-year his-
toryÑand the ... 415 Madison Ave-
nue, New York, NY 1001 7-1 111, fax
(212) 98 0-8 175 or call (800) 77 7-0 444.
ScientiÞc American- branded products
available. For free catalogue, write Sci-
en...
scientific american - 1995 05 - what found the top quark
... Between –2 and –4 are one-
of-a-kind risks, the chance of something happening once a year in the entire
U.S., what Paling calls the “Bobbitt zone.” Going up the scale are still rare
threats such ... extortion.Ó
Miracles are also as-
sociated with luck, and
the Asian variety may be
no exception. An analy-
sis of diÝerent mea-
sures from per capita
income growth to sec-
ondary school e...
scientific american - 1996 03 - revealed - spy photo secrets
... man-
aged a career had no children (as op-
posed to about one in Þve of those who
did not make successful careers). Maxi-
mizing returns from family required
harsh career sacriÞces, and maximiz-
ing ... promising as a possi-
ble source both of taxol-re-
lated compounds and of
other pharmaceuticals. Iron-
ically, some of these sub-
stances may come from the
very fungi that are killing
th...
scientific american - 1997 03 - the rising seas - how much of a threat
... still
diverging from the
mainstream. “For ev-
ery feature you see
that appears to be di-
verging, there are oth-
ers that are converg-
ing,” Wolfram says.
“Kids used to say,
‘Whassup?’ Now they
say, What ... in a class of pro-
teins, called G-proteins, that are acti-
vated by cell receptors and that are ca-
pable of rousing the phosphoinositide
system. “If we can find out why the G-...
scientific american - 1998 03 - inside a virtual human
... of Bose-Einstein con-
densates has cast new light on long-
standing paradoxes of quantum me-
chanics. For example, if two or more
atoms are in a single quantum-mechan-
ical state, as they are in ... studies are a
scapegoat: “We are being
blamed for the failure of
scientists to sell them-
selves politically.” Scien-
tists say, in turn, that hu-
manists resent the special
status enjoy...