Abstract A major challenge in materials science is dynamically adjusting material properties using sensors and control systems. This contribution develops a new approach self‐oscillating copolymer to autonomously change surface response environmental changes. redox‐sensitive terpolymer of N ‐isopropylacrylamide (NIPAM), dimethylacrylamide (DMAc), an iron‐based comonomer ([(phen) 2 (phen‐5‐yl‐ac...

Abstract A persistence theorem for attracting invariant tori for systems subjected to rapidly oscillating perturbations is proved The singular nature of these perturbations prevents the direct application of the standard persistence results for normally hyperbolic invariant manifolds However as is illustrated in this paper the theory of normally hyperbolic invariant manifolds when combined with...

ome cells can induce the production of their own protective blanket. The signal comes from active neurons in the central nervous system (CNS), and triggers the differentiation of oligodendrocyte precursor cells (OPCs)—thus yielding the cells that cover the neurons with a protective sheath of myelin. Now, Beth Stevens, Douglas Fields, and colleagues (National Institutes of Health, Bethesda, MD) ...

The aim of the article is to determine conditions occurrence beating modes in a nonlinear high-order dynamic system with subsequent computer simulation these modes. Methods research oscillatory systems are applied consideration two cases interrelation on rotation (weak and strong) between circuits.
 In first them, for existence approximately same values partial frequencies longitudinal lat...

This paper discusses a novel dynamic resonant wall shear stress sensor concept based on an oscillating sensor operating near resonance. The interaction between the oscillating sensor surface and the fluid above it is modelled using the unsteady laminar boundary layer equations. The numerical experiment shows that the effect of the oscillating shear stress is well correlated by the Hummer number...

This paper considers the history of oscillating water column (OWC) systems from whistling buoys to grid-connected power generation systems. The power conversion from the wave resource through to electricity via pneumatic and shaft power is discussed in general terms and with specific reference to Voith Hydro Wavegen’s land installed marine energy transformer (LIMPET) plant on the Scottish islan...

Kinetic studies of nicotinamide adenine dinucleotide phosphate autofluorescence have been conducted in adherent neutrophils using an improved microscopic photometry system incorporating low noise excitation and detection systems. Dynamic autofluorescence oscillations were found with periods ranging from ∼4 min to ∼10 s. The largest portion of the population of oscillating neutrophils (32%) had ...