Using a principal component (PC) basis that accommodates order unity features in the slow roll parameters as fine as 1/10 of a decade across more than 2 decades of the inflationary expansion, we test slow roll and single field inflation with the WMAP7 data. Detection of any non-zero component would represent a violation of ordinary slow roll and indicate a feature in the inflaton potential or s...

When submarines blow ballast to surface from depth in an emergency, they can experience a roll instability if they ascend with large flow incidence angles. It is shown that an instability is caused by the destabilizing hydrodynamic rolling moment on the sail (which points upwards into the onset crossflow) overcoming the static righting moment (the center of gravity is below the center of buoyan...

The roll angle of the vehicle φ is a characteristic parameter for vehicle's instability. This value appears when steers. If vehicle’s body tilted, vertical force at wheels Fzij will also change. When reaches zero, wheel be lifted off road, rollover phenomenon can occur. At this time, reach maximum φmax. Previous researches have often used only dynamics model to determine limits phenomenon. Howe...

Spatiotemporal pattern formation in the autocatalytic chlorite–tetrathionate reaction is studied experimentally in porous media where heterogeneities are introduced as glass beads packed in a monolayer. From initially vertical planar chemical fronts in a vertical slab, asymmetric convective structures with stable geometry evolve which propagate horizontally with constant speed. The single conve...

In this paper, electrical characteristics of nanoscale single-, double-, and all-around-gate silicon-0n-insulator (SOI) devices are computational investigated by using a quantum mechanical simulation. Considering several important properties, such as on/off current ratio, drain induced channel barrier height lowering, threshold voltage roll off, and subthreshold swing, geometry aspect ratio is ...

In order to describe foot function during the first weeks of independent walking, spatio-temporal pressure distribution patterns were measured. These data give detailed information about roll-off of the foot, by determining the course of the center of pressure, and about load bearing, by calculating relative vertical impulses under the feet. During those first weeks of independent walking, roll...

We report a possible occurrence of horizontal roll vortices over the Adriatic Sea during the bora wind. The National Center for Atmospheric Research Electra aircraft measured the turbulence structure above the Adriatic on 07 November 1999 during the Mesoscale Alpine Program. The data indicate that horizontal roll vortices are generated by the strong cold-air outbreak associated with bora. The r...