[1] Field measurements of the ocean surface wave spectrum focusing on the slope-contributing components are used to construct a spectral model of the ocean surface roughness. The spectral parameterization is established with the observed empirical power law relation between the dimensionless wave spectral density and wind speed. The power law parameters (proportionality coefficient and exponent...

To enhance solubility and the performance of a plant gum (from south peach tree of China, SP gum) as a drilling fluid additive, we explored the potential of Modified SP (MSP) gum by modifying it with epichlorohydrin. The modification conditions, such as the mass ratio of  the crosslinking agent, pH and temperature, were optimized and the results show that 56.40 g/100g mass ratio of the cros...

Using molecular dynamics with an accurate many-body potential, we studied the rapid expansion of Ta metal following the high compression ~50 to 100 GPa! induced by high velocity (2 to 4 km/s! impact. We find that catastrophic failure in this system coincides with a critical behavior characterized by a void distribution of the form N(v)}V, with t;2.2. This corresponds to a threshold in which per...

Variations of marine current speed can lead to strong fluctuations in the power extracted by a marine current turbine (MCT). During short-time period, swell effect is the main cause for the current speed variations. Conventional tip speed ratio Maximum Power Point Tracking (MPPT) algorithm will require the MCT to accelerate or to decelerate frequently under swell effect, which can cause severe ...

Using global satellite Synthetic Aperture Radar (SAR) observations, swell systems are confirmed to travel over very large distances across ocean basins. Satellite observations can provide a global view of swell systems when using a specific ”wave mode” sampling. The data are gathered globally and systematically, but the SAR-derived peak wavelength and directional parameters are restricted to th...

OBJECTIVE To analyze the radiographic, anatomic, and histologic characteristics of the nasal septal swell body. DESIGN Computer-aided analysis of magnetic resonance images (MRIs) and histologic examination of cadaveric nasal septa. SETTING Tertiary medical center. PATIENTS Fifty-four head MRI studies were performed on adult live patients; we also used 10 cadaveric nasal septa. MAIN OUTC...

Several proteins belonging to the ATP-binding cassette superfamily can affect ion channel function. These include the cystic fibrosis transmembrane conductance regulator, the sulfonylurea receptor, and the multidrug resistance protein P-glycoprotein (MDR1). We measured whole cell swelling-activated Cl- currents ( I Cl,swell) in parental cells and cells expressing wild-type MDR1 or a phosphoryla...

A dust void, i.e., the dust-free region in a dusty plasma, results from the balance of the electrostatic and plasma (such as the ion drag) forces acting on a dust particle. The properties of dust voids depend on the ratio of the void size to the mean free path of plasma ions colliding with neutral species of a weakly ionized plasma. For many plasma-processing and plasma-crystal experiments, the...

Global observations of ocean swell, from satellite Synthetic Aperture Radar data, are used to estimate the dissipation of swell energy for a number of storms. Swells can be very persistent with energy e-folding scales exceeding 20,000 km. For increasing swell steepness this scale shrinks systematically, down to 2800 km for the steepest observed swells, revealing a significant loss of swell ener...