In the overall process of utilizing wind power, two essential components of technical data, i.e. one related to the engineering or performance characteristics of commercially available wind turbine generators, and the other related to the availability of wind resources, are needed. The performance of wind energy conversion systems (WECs) depends upon subsystems like wind turbine (aerodynamic), ...

We study the Hamiltonian mean field (HMF) model of coupled Hamiltonian rotors with a heterogeneous distribution of moments of inertia and coupling strengths. We show that when the parameters of the rotors are heterogeneous, finite-size fluctuations can greatly modify the coupling strength at which the incoherent state loses stability by inducing correlations between the momenta and parameters o...

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...

Molecular machines and rotors are important functional components in all living organisms, playing critical roles in processes such as muscle contraction, cell division, motility, supporting cellular metabolism, vesicle and neuronal transport, as well as signaling and energy processing in cellular membranes. 7 High efficiency, flexibility, and robustness of biological nanomachines have stimulat...

This paper summarizes the initial development of a very small-scale rotorcraft that flies on its own power and carries sensors for atmospheric research or planetary exploration. Initial devices are electrically powered, ranging in size from 2 to 15 cm, and have involved challenges in aerodynamics, control, and manufacturing. Many interesting scaling issues arise as one shrinks a flight vehicle ...

A short self-contained derivation is given for the second virial coefficient B2(T) of a gas consisting of identical interacting asymmetric rigid rotors. The resulting expression is correct through variant Planck's over h2. First, the canonical partition function is derived by means of an variant Planck's over h expansion of exp[-H/(k(B)T)] due to Friedmann [Adv. Chem. Phys. 4, 225 (1962)]. The ...

Title of dissertation: DESIGN AND PERFORMANCE PREDICTION OF SWASHPLATELESS HELICOPTER ROTOR WITH TRAILING EDGE FLAPS AND TABS Jaye Falls, Doctor of Philosophy, 2010 Dissertation directed by: Professor Inderjit Chopra Department of Aerospace Engineering This work studies the design of trailing edge controls for swashplateless helicopter primary control, and examines the impact of those controls ...