Signature of rotors

Targeting Atrial Fibrillation Rotors

T he hypothesis that rotors or areas of rapid reentry are critical to maintenance of atrial fibrillation (AF) has gained considerable currency with clinical data supporting enhanced efficacy when targeting these sites in AF ablation (1–3). Regions bordering AF rotors have been shown to generate high wavebreak density (HWD) that corresponds to complex fractionated atrial electrograms (CFAEs). CF...

Stochastic Modeling of Flexible Rotors

Flexible rotors are characterized by inherent uncertainties affecting the parameters that influence the dynamic responses of the system. In this context, the handling of variability in rotor dynamics is a natural and necessary extension of the modeling capability of the existing techniques of deterministic analysis. Among the various methods used to model uncertainties, the stochastic finite el...

Multifunctional Screw Compressor Rotors

For many years the authors have been investigating the use of twin screw machines to fulfil both the expansion and compression. One of potential advantages of screw machines over other types of positive displacement machine is their ability to perform both the compression and expansion functions simultaneously, using only one pair of rotors. A further feature is the use of the rotors which seal...

Neutral metallacyclic rotors.

A prototype of a neutral Re-based metallacyclic rotor, assembled in a one-step process, possesses a para-phenylene rotor that rotates in solution with respect to the stator.

Artificial molecular rotors.