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Publications

These publications showcase the significant science conducted in our Science Centers.

Filter Total Items: 16739

Efficiency and optimal allocation in the staggered entry design Efficiency and optimal allocation in the staggered entry design

The staggered entry design for survival analysis specifies that r left-truncated samples are to be used in estimation of a population survival function. The ith sample is taken at time Bi, from the subpopulation of individuals having survival time exceeding Bi. This paper investigates the performance of the staggered entry design relative to the usual design in which all samples have a...
Authors
W.A. Link

Selenium accumulation and loss in mallard eggs Selenium accumulation and loss in mallard eggs

Five female mallards (Anas platyrhynchos) that had just started egg laying were first fed a diet containing 15 ppm selenium in the form of selenomethionine for 20 d and then an untreated diet for 20 d. Selenium levels in eggs peaked (to about 13-20 ppm) in about two weeks on the treated diet and leveled off at a low level ( 5 ppm) after about 10 d back on the untreated diet. Selenium...
Authors
G. H. Heinz

Order Xenarthra Order Xenarthra

No abstract available.
Authors
A. L. Gardner

Quality-assurance plan for the U.S. Geological Survey Indiana District Water-Use Program Quality-assurance plan for the U.S. Geological Survey Indiana District Water-Use Program

The Indiana District Water-Use Program is an ongoing project with the primary goal of making Indiana water-use data available to Federal, State, and local water managers. The water-use data are obtained from a wide variety of sources. Some data are based on values reported by water users, and other data are based on a variety of estimation techniques. Statements of responsibility...
Authors
D.V. Arvin
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