Performance Criteria in Building
Emphasis on how the elements of a structure perform rather than on precisely how they are built encourages new ideas in building. Such criteria are based on study of what a building's users need...
Features
Enzymes Bound to Artificial Matrixes
A new technique imitates the way enzymes are held in place In the living cell. Besides clarifying cell mechanisms, enzymes bound to matrixes act as biocatalysts in industry and offer a new medical tool...
The Therapeutic Community
In this new approach to treating mental disturbance the ward is a self-governing community. Shared values and social role-playing reinforce therapy based on open discussion of patients' problems...
Unsolved Problems in Arithmetic
It is the nature of arithmetic that it can pose more problems than It can solve. Indeed, one of the triumphs of mathematical logic is the demonstration that there are problems that can never be solved...
Physiological Tremor
A slight oscillation at approximately 10 cycles per second accompanies the normal contraction of voluntary muscle. It appears to be caused by a "hunting" mechanism In the reflex arc that controls the muscle...
The Magnetic Structure of Superconductors
Tiny "quantized vortexes" appear In certain superconducting metals under the influence of a magnetic field. This macroscopic quantum effect can now be studied directly by a novel photographic technique...
Communication between Ants and Their Guests
Ants feed and shelter many other species of arthropods. The key to this hospitality lies in the guests' ability to communicate in the same chemical and mechanical language used by their hosts...
On Telling Left From Right
Although adults seldom find it hard to distinguish between the two, children and animals sometimes have difficulty. Studies suggest that the trouble stems from the bilateral symmetry of the nervous system...
Departments
50 and 100 Years Ago: March 1971
Science and the Citizen: March 1971
- Letters
Letters to the Editors, March 1971
- Recommended
Books
- Mathematical Recreation
Mathematical Games
- Amateur Scientist
The Amateur Scientist
- Departments
The Authors
Bibliography
