20,320 research outputs found
Beyond semi-dwarf wheat yield increases: impacts on the Australian wheat industry of on-going spillovers from the International Maize and Wheat Improvement Center
Wheat genetic materials developed from research at the International Maize and Wheat Improvement Center (CIMMYT) in Mexico for developing countries have provided spillover benefits to Australia. Varieties developed from those genetic materials have resulted in yield increases in Australia. While the initial impact came through the introduction of higher-yielding semi-dwarf wheat crops, those impacts have continued in the post-semidwarf period. CIMMYT’s success in developing countries has also reduced the world price for wheat. While the lower prices affect returns in Australia, the increased yields in Australia from the CIMMYT spillovers from both the semi-dwarfs and the postsemidwarf phases have provided benefits to Australia averaging A $30 million per year.R&D evaluation, R&D policy, spillovers, technology adoption, Crop Production/Industries, Research and Development/Tech Change/Emerging Technologies,
Analysis of fourth sounding rocket heat pipe experiment, summary report
An analysis was made of the cryogenic axial groove methane and axial groove nitrogen heat pipes. Data cover the establishment of reliable start-up and operational data for the cryogenic pipe and its reference control pipes, and requirements for and the applicability of cryogenic heat pipes to NASA coolers
Albedo measurements at the Mt. Lassen test site
Solar energy and reflected radiation flux measurements on mountainous test sit
Noether normalizations, reductions of ideals, and matroids
We show that given a finitely generated standard-graded algebra of dimension
over an infinite field, its graded Noether normalizations obey a certain
kind of `generic exchange', allowing one to pass between any two of them in at
most steps. We prove analogous generic exchange theorems for minimal
reductions of an ideal, minimal complete reductions of a set of ideals, and
minimal complete reductions of multigraded -algebras. Finally, we unify all
these results into a common axiomatic framework by introducing a new
topological-combinatorial structure we call a generic matroid, which is a
common generalization of a topological space and a matroid.Comment: 13 pages; to appear in Proceedings of the American Mathematical
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