Multi-dimensional and multi-variable heterogeneous petrophysical reservoir models were constructed based on stochastic analysis of well logs. With a full wave form visco-elastic finite difference modeling software, a numerical experiment (cross borehole survey) was conducted to study the impact of Pand S-wave scattering, wave mode conversion, leaky mode mechanism and their integration on the ap...

Wind Energy is one of the favorable renewable energy resources and the multilevel inverter has been proven to be one of the important enabling technologies in wind energy conversion system (WECS) utilization. Wind energy conversion system with utilization grid systems are getting more and more widespread with the increase in the energy demand and the concern for the environmental pollution arou...

Many remarkable properties of graphene are derived from its large energy window for Dirac-like electronic states and have been explored for applications in electronics and photonics. In addition, strong electron-phonon interaction in graphene has led to efficient photo-thermo energy conversions, which has been harnessed for energy applications. By combining the wavelength independent absorption...

The goal of direct drive ocean wave energy extraction system is to convert ocean wave energy into electricity. The problem explored in this paper is the design and optimal control for the direct drive ocean wave energy extraction system. An optimal control method based on internal model proportion integration differentiation (IM-PID) is proposed in this paper though most of ocean wave energy ex...

The energy conversion between the vertical shear flow and the vertical mean flow has been computed using atmospheric data from the isobaric surfaces: 850, 700, 500, 300, and 200 mb. I n comparison with carlier calculations based on a smaller vertical resolution (2 levels) and a smaller sample, it is found that the new calculations give larger numerical values in better agreement with the result...

Mixing in the abyssal ocean is known to play an important role in controlling the large-scale ocean circulation. In the search for sources of mechanical energy for mixing, internal tides generated by the interaction of the barotropic tide with bottom topography (mode conversion) have been implicated. However, estimates of the rate at which barotropic tidal energy is converted into the internal ...

Inspired by the natural phenomenon of strong attenuation of oceanic surface waves by muddy seafloors, the Theoretical and Applied Fluid Dynamics Laboratory at the University of California, Berkeley, has recently investigated a mud-resembling synthetic compliant seabed carpet (so called Wave Carpet), composed of linear springs and generators, that can be used as an efficient wave energy conversi...

A coordinated experimental and theory/simulation effort has been carried out to investigate the physics of the Traveling Wave Direct Energy Converter (TWDEC), a scheme that has been proposed in the past for the direct conversion into electricity of the kinetic energy of an ion beam generated from fusion reactions. This effort has been focused in particular on the TWDEC process in the high densi...

Harnessing ocean wave energy is an old challenge that has gained momentum in recent years. In this paper, we present the flow and electrical characterization of a prototype alternate liquid metal magnetohydrodynamic (MHD) generator at laboratory scale which potential to make use marine waves for its conversion into energy. The eutectic alloy Galinstan, used as working fluid, was driven oscillat...