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3,585 results
3,585 results for: assessments
- Health & Medicine
The Cancer of Dorian Gray
By studying mice that have been engineered to carry mutations in certain tumor-suppressing genes, researchers have identified a link between cancer and aging.
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The Predator’s Gaze
A new wave of research is trying to untangle the origins and nature of psychopathy, a personality style characterized by a lack of conscience, empathy, or guilt that attracts intense interest from the legal system.
- Humans
Science News of the Year 2006
A review of important scientific achievements reported in Science News during the year 2006.
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19856
In this article, researchers found “astronomical concentrations” of deca-BDE in the residents of Guiyu, and the article cites studies showing that related PBDEs harm brain development in mice and rats. So, has any actual increase in brain-development problems been found in people in and around Guiyu? Joanne Raisner NaradLos Altos, Calif. The researchers know of […]
- Math
Buffon’s Needling Ants
The classic probability experiment known as Buffon’s needle produces a statistical estimate of the value of pi, the ratio of a circle’s circumference to its diameter. The experiment consists of randomly dropping a needle over and over again onto a wooden floor made up of parallel planks. If the needle’s length is no greater than […]
- Math
Buffon’s Needling Ants
The classic probability experiment known as Buffon’s needle produces a statistical estimate of the value of pi, the ratio of a circle’s circumference to its diameter. The experiment consists of randomly dropping a needle over and over again onto a wooden floor made up of parallel planks. If the needle’s length is no greater than […]
- Math
Tolstoy’s Calculus
“Absolute continuity of motion is not comprehensible to the human mind. Laws of motion of any kind become comprehensible to man only when he examines arbitrarily selected elements of that motion; but at the same time, a large proportion of human error comes from the arbitrary division of continuous motion into discontinuous elements.” This striking […]
- Math
Ice Cream Wars
A visit to the supermarket can present a shopper with a bewildering array of choices. For ice cream alone, the consumer faces a variety of brands, flavors, container sizes, and types (fat-free versus low-fat versus premium, and so on). At the same time, deciding which items to stock is a formidable problem for retailers. They […]
- Math
Highway Relativity
There may be more to zipping along in the fast lane than meets the casual eye. Freeway drivers often sense that cars in an adjacent lane are moving faster than those in their own lane. That’s certainly true when the average speed of the cars in the next lane is significantly higher than that of […]
- Math
Highway Relativity
There may be more to zipping along in the fast lane than meets the casual eye. Freeway drivers often sense that cars in an adjacent lane are moving faster than those in their own lane. That’s certainly true when the average speed of the cars in the next lane is significantly higher than that of […]
- Humans
Weighing In on City Planning
Accumulating evidence suggests that urban sprawl discourages physical activity and may thereby contribute to obesity and related health problems.
- Earth
Aquatic Non-Scents
Many common pollutants appear to be jeopardizing the survival of fish and other aquatic species by blunting their sense of smell.
