Neurophysiological and functional imaging studies have demonstrated that frontal regions of the brain are particularly responsive to homeostatic sleep pressure. Previous neuropsychological studies indicate that sleep deprivation causes impairments in prefrontal cortical function. Random number generation (RNG) is thought to provide a sensitive index of executive functions that rely on the prefr...

We provide the first provable-security analysis of the Intel Secure Key hardware RNG (ISK-RNG), versions of which have appeared in Intel processors since late 2011. To model the ISKRNG, we generalize the PRNG-with-inputs primitive, introduced by Dodis et al. at CCS’13 for their /dev/[u]random analysis. The concrete security bounds we uncover tell a mixed story. We find that ISKRNG lacks backwar...

trajectory using genetic algorithms (GA) is presented. The efficiency of the proposed approach, without loss of generality, is demonstrated through a simulation carried out on a planar 6-DOF robot manipulator. The approach benefits from two key features. First, the method of data representation which guarantees the satisfaction of joints angle limits, and second the conversion of considered mod...

The gravel packing completion method for horizontal wells has the advantages of maintaining high oil production a long time, wellbore stability, and preventing sand production, so it become preferred wells. At present, this technology still faces problems bed height poor migration. In order to improve efficiency in wells, pulsed is proposed first time. Based on mechanism hydraulic pulse, Euleri...

The corner impinging jet concept has been proposed as a new air distribution system for use in office environments. present paper reports the mean flow field behavior of an isothermal corner-based turbulent room. A detailed experimental study is carried out to validate numerical simulations, and predictions are performed using three turbulence models. RNG k−ε model was chosen this study. This i...

The demand for a centrifugal pump with open impellers conveying dense fine particles in solid-liquid two-phase flow has increased significantly actual engineering. wear of on the is also exceedingly prominent, which affects engineering efficiency and economic benefits. three-dimensional unsteady; movement high-volume concentration its mutual influence flow, results calculation wear, are very in...

In the present work, effects of modifying tongue geometry a centrifugal pump on pressure pulsations under design and off-design conditions are carried out numerically by unsteady analysis fluid flow. Numerical modeling based Re-Normalization Group (RNG) k-ε turbulence model using Mosaic mesh structure, technology which can easily, quickly formally connects any type for complex geometries flow r...

In a laterally asymmetric intake pumping station, the flow direction in forebay is not consistent with channel. Thus, adverse patterns, such as bias flow, large-scale vortex and occur frequently sump. Based on Reynolds-averaged Navier-Stokes (RANS) equation RNG k-ε turbulence model, recent pattern station was numerically simulated analyzed, effective elimination measures were proposed. For orig...

In this paper n, k are natural numbers, X is a non empty set, and S is a σ-field of subsets of X. Next we state several propositions: (1) Let M be a σ-measure on S, F be a function from N into S, and given n. Then {x ∈ X: ∧ k (n ≤ k ⇒ x ∈ F (k))} is an element of S. (2) Let F be a sequence of subsets of X and n be an element of N. Then (the superior set sequence of F )(n) = ⋃ rng(F ↑ n) and (th...