|
Strings and strands. (End Note).(Brief Article)
From:
Strategic Finance
| Date:
June 1, 2002
| COPYRIGHT 2002 Institute of Management Accountants. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group.Copyright information
|
The Inca Quipu, 1500 A.D.
With no written language, the Incas used bundles of knotted cords called quipus to keep their mathematical records. It was not until 1923 that L. Leland Locke at the Museum of Natural History in New York cracked the code of the knots and colored strings. Locke speculated that the knots on the strings were in the traditional base-10 positions of units, tens, and hundreds so that a hanging string (pendant) with three knots at the top, two in the m...
Related newspaper, magazine, and journal articles from HighBeam Research
|
Simulations nab protein-folding mistakes.(Brief Article)
Science News
; ... globular structures in which water-repelling amino acids end up on the inside and water-attracting ones on the outside ... process on a computer has proved difficult. Moreover, protein strands in cells have many jostling neighbors, King notes. Two partially folded protein molecules may end up sticking ...
|