Two improvements to the Logan model of temperature-dependent development were proposed, first eliminated a redundant parameter then incorporated an intercept parameter, thereby resolving the inability of the original model to estimate a low-temperature developmental threshold.Expand

It is shown how to construct a large variety of sets of four complex sequences with zero autocorrelation, suitable for the construction of various matrices such as Hadamard matrices, complex Hadamards matrices and signed group HadamARD matrices over the dihedral signed group.Expand

New values of t are obtained such that, for any odd number p, there exists an Hadamard matrix of order 2 t p, and there exists a circulant signed group Hadamards matrix of every even order n, using a suitable signed group.Expand

SummaryConsideration of the Associativity Equation,x ∘ (y ∘ z) = (x ∘ y) ∘ z, in the case where∘:I × I → I (I a real interval) is continuous and satisfies a cancellation property on both sides,… Expand

In 1867, Sylvester considered n × n matrices, ( a ij ), with nonzero complex-valued entries, which satisfy ( a ij )( a ij −1 ) = nI Such a matrix he called inverse orthogonal . If an inverse… Expand

Abstract A question arising in stream cypher cryptanalysis is reframed and generalized in the setting of Hadamard matrices as follows: For given n, what is the maximum value of k for which there… Expand

We consider real orthogonal $n\times n$ matrices whose diagonal entries are zero and off-diagonal entries nonzero, which we refer to as $\mathrm{OMZD}(n)$. We show that there exists an… Expand

This paper investigates patterns among those lengths and weights that are within easy computational distance from the last length considered therein, length 14, and provides support for the previous conjectures, and shed enough new light to speculate further as to the likely ultimate shape of the theory.Expand