The occurrence of SH wave propagation under the effect of a point source in an orthotropic substratum lying over a heterogeneous orthotropic half space is deliberated in the prospect of a devastating earthquake. The quadratic alteration is acknowledged for density and shear modulus which is hypothesized to be a function of depth. The method of Green's function and transformation technique contr...

In this article, we consider finite dimensional dynamical control systems described by nonlinear impulsive Ito type stochastic integrodifferential equations. Necessary and sufficient conditions for complete controllability of nonlinear impulsive stochastic systems are formulated and proved under the natural assumption that the corresponding linear system is appropriately controllable. A fixed p...

— Anomaly detection techniques are widely used in a various type of applications. We explored proximity graphs for anomaly detection and the Page Rank algorithm. We used a different PageRank algorithm at peak in proximity graph collection of data points indicated by vertices, gives results a score quantifying the extent to which each data point is anomalous. In this way we requires first formin...

Recently, research on the child and childhood as a social and cultural phenomenon has been approached from the position of multidimensionality and extreme complexity. Childhood, as opposed to the beliefs of the majority of adults, is not an isolated, protected, well controlled and predictable manner of guiding a child towards the adult world. Childhood is more focused on the general perception ...

A deterministic model of economic growth and pollution accumulation, in the form of a system of partial differential equations, is designed and analyzed. The model assumes pollution as a by-product of production. The stock of pollution has a negative impact on production. The accumulation of pollution is dampened by a share of the investments, in the form of an environmental tax. We consider a ...

The dynamics of n-dimensional Lotka–Volterra equations having an invariant hyperplane is investigated herein. There exists a fundamental difference between the evenand the odd-dimensional case. For even dimensions the dynamics are generated by a Hamiltonian system with respect to an appropriately chosen Poisson structure. For odd dimensions the dynamics are Hamiltonian if there is a continuum o...

Radiocarbon dating of a wood sample from the upper part of a sequence of coarse fluvial gravels at Branchs Creek has confirmed that accumulation of coarse fluvial gravels continued into the late Mid Holocene, prior to an influx of up to 3 m of sand during the last two millenia. Ongoing erosion at Branchs Creek has revealed that clay previously interpreted as a separate unit beneath the gravels ...

Point of View: Radio as a Science Tool S. Asmar This month, our Point of View paper explores the use of radio technology not only as a wonderful communications tool but also as a means of determining important scientific measurements that have contributed to advancing space technology as well as other areas of discovery. Obviously, radio technology was one of the defining developments of the tw...

The thesis that noisy identi"cation has close ties to the study of the singular-value decomposition of perturbed matrices is investigated. In particular by assuming an upper bound on the norm of the perturbation, one can obtain a convex parametrization of an uncertain family of systems which contains the system generating the data. In this approach, the second-smallest singular value p * of an ...

Heterogeneous networks (het-nets) – comprising of conventional macrocell base stations overlaid with femtocells, picocells and wireless relays – offer cellular operators burgeoning traffic demands through cell-splitting gains obtained by bringing users closer to their access points. However, the often random and unplanned location of these access points can cause severe near-far problems, typic...