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Contents of the November/December 1995 issue of Quantum
 Feature articles
The Importance of Studying the Physics of Sound Insulation
by Roman Vinokur
Dr. John Watson is bothered by street noise in his office, so his friend Sherlock
Holmes solves that problem, and then some.
Signals, Graphs, and Kings on a Torus
by A. Futer
Ensuring clear communication by means of “error graphs,” with a toroidal side
trip.
Less Heat and More Light
by Y. Amstislavsky
The “ideal black body,” Kirchhoff’s radiation law, and the challenge of
efficient artificial illumination.
The Mean Value of a Function
by Yury Ionin and Alexander Plotkin
An arithmetic concept is stretched and applied in unexpected places.
Departments
Kaleidoscope: Graphs and Grafs
Leo Tolstoy and Lewis Carroll brush shoulders in this primer on graph theory.
In the Lab: A Viscous River Runs Through It
by Henry D. Schreiber
A look at the engine-saving properties of motor oil.
At the Blackboard: Smoky Mountain
by Ivan Vorobyov
Why the air is always warmer on the leeward side.
Looking Back: Georg Cantor
by Vladimir Tikhomirov
Set theory and its wide-ranging ramifications are the subject of this anniversary
retrospective.
Physics Contest: Gravitational Redshift
by Arthur Eisenkraft and Larry D. Kirkpatrick
An intergalactic application of the Doppler shift.
Math Investigations: Lost in a Forest
by George Berzsenyi
A problem area inititated by the great Richard E. Bellman.
Toy Store: Hands-on Topology
by Boris Kordemsky
A baker’s dozen experiments with the Moebius strip.
How Do You Figure?: Challenges in Physics and Math
Brainteasers: Just for the Fun of It!
Check out this sample!
Happenings
Crisscross Science
Scientific crossword puzzle.
Answers, Hints & Solutions
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