Powerful cryptographic systems need qualified random numbers. Qualified random numbers need providing good statistical qualities, not predicting and not re-generating. The numbers generated by raw Pseudo Random Number Generators (PRNG) can be predicted when their seed value are detected or the functions used in the system are not complicated enough. Moreover, the stream generated repeats itself...

The Lattice Boltzmann method is a novel method used in lieu of the traditionally used Navier-Strokes equation for the simulation of fluid flows. In our paper, we discuss how we implemented a hybrid (OpenMP/MPI) parallel Lattice Boltzmann application based on an existing MPI-only version. Then we use two multicore systems – Hydra IBM p5575 from Texas A&M and Dori from Virginia Tech – to collect ...

The three-level hybrid parallel programming model consisting of MPI, OpenMP and vectorization with multicolor-based reordering methods provides optimum performance on SMP cluster architectures with vector processors such as the Earth Simulator (ES) for finite-element type applications. While the three-level hybrid and flat MPI parallel programming models offer similar performance, the hybrid pr...

We show that the formalism of hybrid polynomials, interpolating between Hermite and Laguerre polynomials, is very useful in the study of Motzkin numbers and central trinomial coefficients. These sequences are identified as special values of hybrid polynomials, a fact which we use to derive their generalized forms and new identities satisfied by them.

We describe a high-speed physical random number generator based on a hybrid Boolean network with autonomous and clocked logic gates, realized on a reconfigurable chip. The autonomous logic gates are arranged in a bidirectional ring topology and generate broadband chaos. The clocked logic gates receive input from the autonomous logic gates so that random numbers are generated physically that pas...

BACKGROUND National Strategic Plans (NSPs) for HIV have become foundational documents that frame responses to HIV. Both Global Fund and PEPFAR require coordination with NSPs as a component of their operations. Despite the role of NSPs in country planning, no rigorous assessment of NSP targets and performance outcomes exists. We performed a quantitative analysis of the quality of NSP indicators ...

Hybrid-redundant number representation has provided a flexible framework for digit-parallel addition in a manner that facilitates area-time tradeoffs for VLSI implementations via arbitrary spacing of redundant digit positions within an otherwise nonredundant representation. We revisit the hybrid redundancy scheme, pointing out limitations such as representational asymmetry, lack of representati...