Radioactive chromium-51, a waste byproduct from operation
of nuclear reactors at Hanford, Washington, has been followed down
the Columbia River and into the Pacific Ocean. Chemical factors
influencing the partitioning of ⁵¹Cr between solution and sediment
have been considered.
Chromium-5l, in a hexavalent oxyanion when introduced into the
Columbia River,...
Physical, chemical and bacterial water quality parameters of
the upper Wallowa River were sampled periodically between July 2,
1978 and June 9, 1979 at nine stream and lake sampling sites. Water
upstream from Wallowa Lake was typified by low nutrient concentrations
( generally below detectable limits except for nitrates), low....
In the context of forest products, a cutting order is a list of dimension parts along with demanded quantities. The cutting-order problem is to minimize the total cost of filling the cutting order from a given lumber grade (or grades). Lumber of a given grade is supplied to the production...
A log breakdown model, SAW3D, was developed to
optimize lumber recovery from logs of any shape in 3-
dimensional space. The program uses a polygonal cross
section representation of logs; three nested dynamic
programming (DP) algorithms to optimize log breakdown,
flitch and cant edging, and trimming operations; and a
simple...
Nineteenth-century England witnessed burgeoning urban growth and the resultant struggle of the poor to find adequate shelter. Against this backdrop, Charles Dickens was a fierce advocate for the rights of the street people of London to have sanitary and adequate housing, earning him the title of radical. By combining sentimentality...
Between 1970 and 1974, data were collected on the distribution and biology of the spotted owl (Strix occidentalis) in Oregon. One-hundred and sixteen pairs and seven single birds were located. Spotted owls occurred throughout the mountains of western Oregon and on the east slope of the Cascade Range at least...