In order to improve the energy capture efficiency of a multi-pendulum wave energy converter, a mathematical model of the pendulum structure has been built. The final structure parameters of the pendulum have been obtained by using genetic algorithm based on the numerical simulation results of the pendulum structure optimization. The results show that under obtained structure parameters the prop...

the north atlantic oscillation (nao) is one of the most prominent modes of low-frequency variability over the atlantic basin in the northern hemisphere. in the past decades, the impact of nao has attracted increasing scientific interest because the nao exerts an important impact on the regional climate and weather in the north atlantic region and adjacent continents. of particular interest is t...

This article presents the electromagnetic and mechanical design analyses of a 7.67:1 gear ratio magnetic (MG) for wave energy converter demonstrator. A 2-D 3-D magnetostatic finite-element analysis (FEA) was conducted to maximize mass torque density. To increase without increasing diameter, unique dual-stack rotor topology used along with 12-segment per pole-pair inner Halbach array four-segmen...

We speculate that the universe is filled with stars composed of electromagnetic and dilaton fields which are the sources of the powerful gamma-ray bursts impinging upon us from all directions of the universe. We calculate solitonlike solutions of these fields and show that their energy can be converted into a relativistic plasma in an explosive way. As in classical detonation theory the convers...

We study the formation, evolution and structure of dissipative fronts produced by overtaking collisions of relativistic streams, with emphasis on strongly magnetized flows. The evolution of the system is followed using analytical approach in the simple wave regime and numerical simulations in the non-simple wave regime, until a steady-state is reached. The steady-state structure of the front is...

We compare the efficiency of thin film photonic crystal solar cells consisting of conical pores and nanowires. Solving both Maxwell's equations and the semiconductor drift-diffusion in each geometry, we identify optimal junction and contact positions and study the influence of bulk and surface recombination losses on solar cell efficiency. We find that using only 1 lm of silicon, sculpted in th...

This paper proposes a theory for optimizing the power generated from stationary stochastic vibratory disturbances, using a resonant energy harvester. Although the theory is general, the target application of the paper concerns ocean wave energy harvesting. The control technique involves the use of a causal discrete-time feedback algorithm to dynamically optimize the power extracted from the wav...