... because the
power and economy of mass-
produced processors are often
cited as factors in the collapse
of the supercomputing market. As
much cheaper and easier-to-use work-
stations based on off -the- shelf ... nuclei. Consequently,
the big bang model predicts that about
one quarter of the mass of the normal
matter of the universe is made of helium
and the other...
... two cen-
turies. When dinosaurs such as Iguan-
odan grabbed the attention of paleon-
tologists in the 1830s, the novelty of
the fish-lizards faded away. Intense in-
terest in the rulers of the Jurassic ... most other verte-
brates have bones in their eyes.) In
the case of ichthyosaurs, the ring
presumably helped to maintain
the shape of the eye against the
force...
... loners. The
families have very diÝerent char-
acters, which reßect the person-
ality of the matriarch. In the
case of Echo, the family is low-
key and nonaggressive.
How the 50-year-long rela-
tionships ... proÞt-
able segments of the market. Among
the models offered for sale in a given
year, the more fuel-eÛcient ones tend
to be the smaller, slower, bottom -of- the...
... stunning
movie of our watery planet. The
spacecraft examined the outer
expanses of the earthÕs magnet-
ic Þeld and took the Þrst mea-
surements of the moonÕs far
side since the days of the Apol-
lo program. ... returned to the earth
over the low-gain antenna. Tape-search-
50 SCIENTIFIC AMERICAN December 1995
JAILBARS, slices of images taken of the asteroid...
... dif-
ferent risk factors may affect the expres-
sion of the disorder,” the group con-
cludes in the Journal of the American
Medical Association.
The lead author of the study, the larg-
est of ... professor of psychology at
the University of Liverpool,
and other academics have
ruffled a few well-groomed
feathers in the staid linguis-
tics community. Their gos-...
... gam-
ma-chain gene were causing the im-
munodeficiency. With the further assis-
tance of Howard M. Rosenblatt of the
Baylor College of Medicine and Alexan-
dra H. Filipovich of the University of
Minnesota, ... Furthermore, if the hot
end of the rod is then plunged into ice,
a wave of cooling will follow the wave
of heat down the length of the metal.
In the...
... perennial
fear of being held hostage to the suc-
cess of their favorite supplier. It dis-
tributes, and thereby speeds, the work
of adapting software to all the diÝerent
bits of hardware used on the Internet.
It ... CygnusÕs
software-for-free, service-for-fee strate-
gy could foster innovation. It creates an
easy-to-cross bridge between the aca-
demic world and the commerc...
... case.
The type of mine, the specifics of its
operation, its position on the ground,
the position of the victim and the char-
acteristics of the environment at the ex-
plosion site all affect the ... status
reports. The
DOE had no way of know-
ing whether the project was on track.
Agency managers could not even esti-
mate the size of the new system. Never-...
... microorganisms.
If the impact of urban agriculture con-
tinues to broaden, the notion of the gar-
den city
the turn -of- the- century dream
of urban centers lined with trees and or-
namental plants
—may ... surprising: they whip
around the planet at up
to 200 meters per second.
Overall, however, data
from the probe’s 57-min-
ute descent did not chal-
lenge the prevailing...
... concentration of ozone-de-
pleting chemicals in the lower atmo-
sphere is falling off fast. Based on
their calculations, the amount had de-
creased some 1 percent by the middle
of last year. The decline ... can access the software that will
make them something other than a sili-
con-and-plastic paperweight. Larry El-
lison of Oracle reckons the low price of
an NC will make...