Choosing suitable varieties and manipulating plant population are crucial management aspects in any cropping system that goals to improve yield, quality the balance between demand environmental resource availability. A two-year field experiment was conducted at Tehran, Iran, a split plot design replicated thrice examine effect of planting density (low, moderate high) on ten cotton genotypes. In...

I magine a society with perfect economic equality. Perhaps out of sheer coincidence, the supply and demand for different types of labor happen to produce an equilibrium in which everyone earns exactly the same income. As a result, no one worries about the gap between the rich and poor, and no one debates to what extent public policy should make income redistribution a priority. Because people e...

That tired Ten-Percent claim pops up all the time. Last year, national magazine ads for U.S. Satellite Broadcasting showed a drawing of a brain. Under it was the caption, "You only use 11 percent of its potential." Well, they're a little closer than the ten-percent figure, but still off by about 89 percent. In July 1998, ABC television ran promotional spots for "The Secret Lives of Men," one of...

An information retrieval performance measure that is interpreted as the percent of perfect performance (PPP) can be used to study the effects of the inclusion of specific document features or feature classes or techniques in an information retrieval system. Using this, one can measure the relative quality of a new ranking algorithm, the result of incorporating specific types of metadata or folk...

A classical result of Rothschild and van Lint asserts that if every non-zero Fourier coefficient a Boolean function f over F2n has the same absolute value, namely |fˆ(α)|=1/2k for α in support f, then must be indicator some affine subspace dimension n−k. In this paper we slightly generalize their result. Our main shows that, roughly speaking, functions whose coefficients take values set {−2/2k,...

Let χ1(n) denote the maximum possible absolute value of an entry of the inverse of an n by n invertible matrix with 0, 1 entries. It is proved that χ1(n) = n 1 2. This solves a problem of Graham and Sloane. Let m(n) denote the maximum possible number m such that given a set of m coins out of a collection of coins of two unknown distinct weights, one can decide if all the coins have the same wei...

Improvements to code dimension of evaluation codes, while maintaining a fixed decoding radius, were discovered by Feng and Rao, 1995, and nicely described in terms of an order function by Høholdt, van Lint, Pellikaan, 1998. In an earlier work, 2006, we considered a different improvement, based on the observation that the decoding algorithm corrects an error vector based not so much on the weigh...