Cancellation of juxtacardiac esophageal electrocardiograms, as demonstrated in this study, indicates certain limitations of the equivalent cardiac dipole hypothesis. A new and more fundamental theory developed here shows that in large measure cancellation occurs because the cancellation network is in effect a relatively insensitive electrocardiographic connection, and because there is always pr...

This paper proposes an efficient multichannel line echo canceler algorithm with interchannel distribution of computations. A limited number of coefficient adaptations are distributed among channels depending on the degree of convergence and the input signal power to achieve up to 50% reduction of total computations. Coefficient adaptations are more frequently performed in the channels where con...

We perform an analysis of the ultraviolet divergences quantum nonprojectable Horava gravity. work field theory directly in Hamiltonian formalism provided by Batalin-Fradkin-Vilkovisky quantization. In this way second-class constraints can be incorporated to A known local gauge-fixing condition leads a canonical Lagrangian. Although fields acquire regular propagators, irregular propagators persi...

In this article, we present a dynamical homotopical cancellation theory for Gutierrez-Sotomayor singular flows $\varphi$, GS-flows, on surfaces $M$. This generalizes the classical of Morse complexes smooth systems together with corresponding non-degenerate singularities. is accomplished by defining GS-chain complex $(M,\varphi)$ and computing its spectral sequence $(E^r,d^r)$. As $r$ increases,...

We derive global consistency condition for strongly coupled heterotic string in the presence of M5-branes. Its elliptic genus is interpretable as generating functional anomaly polynomials and so, on anomaly-free vacua, both holomorphic modular invariant. In basis, we identify properties by calculating phase. By interpreting refinement parameters background curvature tangent vector bundles, show...

We discuss consistency conditions for branes at orbifold singularities. The conditions have a world-sheet interpretation in terms of tadpole cancellation and a space-time interpretation in terms of anomalies. As examples, we consider type II and type I branes on C /ZM orbifolds. We give orientifold constructions of phases of type I or heterotic string theory, involving branches with extra tenso...

Thurston conjectured that a closed triangulated 3-manifold in which every edge has degree 5 or 6, and no two edges of degree 5 lie in a common 2-cell, has word-hyperbolic fundamental group. We establish Thurston’s conjecture by proving that such a manifold admits a piecewise Euclidean metric of non-positive curvature and the universal cover contains no isometrically embedded flat planes. The pr...