Zones index an N-dimensional Euclidian or metric space to efficiently support points-near-apoint queries either within a dataset or between two datasets. The approach uses relational algebra and the B-Tree mechanism found in almost all relational database systems. Hence, the Zones Algorithm gives a portable-relational implementation of points-near-point, spatial cross-match, and self-match quer...

Double Benioff zones provide opportunities for insight into seismogenesis because the underlying mechanism must explain two layers of deep earthquakes and the separation between them. We characterize layer separation inside subducting plates with a coordinate rotation to calculate the slab-normal distribution of earthquakes. Benchmark tests on well-established examples confirm that layer separa...

Seasonal variation and planktonic abundance has profound effects on the attachment of V. cholerae devastating agent for causing cholera. As crustacean plankton is primitive carrier cholera bacterium, which stage most efficient to however a curious interrogation resolve. Here in this experiment, laboratory microcosms were prepared with estuarine Mathbaria water, saline Paikgacca water fresh lake...

In this paper, we study the existence of limit cycles in continuous and discontinuous planar piecewise linear Hamiltonian differential system with two or three zones separated by straight lines such that systems define one have isolated singular points, i.e. centers saddles. case, show if is either zones, then it has no cycles. Now, at most cycle, there are examples cycle. More precisely, witho...