Uncategorized
-
About Time
To find out the official time, visit the joint Web site of the National Institute of Standards and Technology and the U.S. Naval Observatory. Two ultraprecise clocks contribute to a pool used to define “coordinated universal time.” These two clocks are not supposed to differ by more than one ten-millionth of a second. The site […]
-
From the June 3, 1932, issue
GENERATOR LOAD DIVIDED FOR BETTER OPERATION Without the pretty girl, this massive stationary winding of a turbine electric generator might appear to be the size of a spool of thread. But contrast emphasizes the machines 83,300 kilovolt-ampere capacity. The black arms are heavily insulated butt-ends of copper bars in which electricity is to be generated. […]
-
Bio Light
Devoted to organisms that chemically generate light, the bioluminescence Web pages from the University of California, Santa Barbara provide vivid images of this phenomenon in all its splendor. The site also furnishes basic information about the chemistry and biology of bioluminescence and provides links to recent research on the topic. Go to: http://lifesci.ucsb.edu/~biolum/
-
19071
This article would better have been titled “Deprivation of dietary antioxidants leads to selective tumor inhibition.” The issue of antioxidants and cancer is an area of controversy, but the great preponderance of literature on this subject supports the use of antioxidants as sole therapy and with conventional oncologic care. These effects have had limited usefulness […]
- Math
Setting Records Randomly
A wide variety of factors can influence the winning time of a race. For a given event over the course of a year, for example, the results may depend on the quality of the runners, the race location, weather conditions, and so on. In a 1985 article in the Journal of the American Statistical Association, […]
- Earth
Mapping the Frozen Sky: Study looks at clouds from both sides now
By combining simultaneous observations from satellites and ground-based instruments, scientists can generate a three-dimensional map of the size and distribution of ice particles in a cirrus cloud.
-
Snooze Power: Midday nap may awaken learning potential
A brief daytime nap may block or even reverse learning declines that occur during extended practice of a perceptual task.
-
19064
I found this article enlightening. However, it should be noted that similar effects can be obtained at slower speeds using a towel in a locker room. Alan UnellLa Crescenta, Calif. The story ended by mentioning that researchers would be continuing to work on a computer model. Here’s some additional information you may wish to pass […]
- Physics
Loud Loop: New explanation of whip-snapping unfurls
The wake of a loop zooming along a whip may silence the faster-moving tip so the loop actually causes the whip's loud bang.
- Health & Medicine
Eat Broccoli, Beat Bacteria: Plant compound kills microbe behind ulcers and a cancer
A chemical abundant in broccoli and certain other vegetables kills ulcer-causing Helicobacter pylori bacteria in the laboratory and inhibits stomach cancer in mice.
- Animals
Sniff . . . Pow! Wasps use chemicals to start ant brawls
Wasps sneak around in ant colonies thanks to chemicals that send the ants into a distracting frenzy of fighting among themselves.
-
Mussel Muzzled: Bacterial toxin may control pest
A toxin made by bacteria could help stop the spread of zebra mussels.
