OBJECTIVE To evaluate and compare the efficacy of an oscillating-rotating (O-R) power toothbrush with a brush head utilizing angled bristles to a marketed sonic toothbrush in the reduction of plaque and gingivitis over an eight-week period. METHODS This study used a randomized, examiner-blind, single-center, two-treatment, parallel group, eight-week design. Subjects with mild-to-moderate plaq...

We present the results of direct simulation expansionof a two-component ultracold plasmafor various numbers particles, densities, and electron temperatures. A description expansionprocess common to all plasma parameters is given. After escape fast electrons from plasmacloud, excess positive charge localized at outer boundary, in narrow layer. This layerhas characteristic front shape with sharp ...

The availability of 5-year time series velocity and temperature data from two sonic anemometers installed at Jang Bogo Station, Antarctica, allowed a systematic investigation the turbulence features in stable layer affected by submeso motions characterized vertical divergence some second-order moments for large fraction (quite non-ideal surface layer). effect averaging interval on statistics sh...

Abstract. Atmospheric turbulence can be characterized by the Reynolds stress tensor, which consists of second-order moments wind field components. Most commercial nacelle lidars cannot estimate all components tensor due to their limited number beams; most along-wind velocity variance relatively well. Other are however also important understand behavior of, e.g., vertical profile and meandering ...

We present an exact $\gamma=5/3$ spherical accretion solution which modifies the Bondi boundary condition of $\rho \to const.$ as $r\to \infty$ to 0$ $r \infty$. This change allows for simple power law solutions on density and infall velocity fields, ranging from a cold empty free-fall where pressure tends zero, hot hydrostatic equilibrium limit with no velocity. As in case solution, maximum ra...

This paper describes an exploration of visual and sonic texture. These textures are linked by a swarm of “tech-tiles”, where each tech-tile is a rectangular element of an image or a sequence of audio samples. An entire image can be converted to a single tech-tile, which can be performed as a composition, or a swarm of small tiles can fly over the image, generating a sonic improvisation. In each...

Sonic boom research conducted at NASA through the Supersonics Project of the Fundamental Aeronautics Program is oriented toward understanding the potential impact of sonic boom noise on communities from new low-boom supersonic aircraft designs. Encompassing research in atmospheric propagation, structural response, and human response, NASA research contributes to knowledge in key areas needed to...

Based on focus groups and interviews with student renters in an Israeli slum, the article explores the contributions of differences in sonic styles and sensibilities to boundary work, social categorization, and evaluation. Alongside visual cues such as broken windows, bad neighborhoods are characterized by sonic cues, such as shouts from windows. Students understand "being ghetto" as being loud...

AIM Powered or manual toothbrushes are daily-used instrument in the Western area for the control and removal of bacterial biofilm. Among powered-toothbrushes, sonic technology has shown to produce fluid turbulent activity that might assist in plaque removal; however, limited knowledge is available in-vivo. The objectives of this study were to compare the plaque removal efficacy of two different...

The cortex and basal ganglia are the major structures of the adult brain derived from the embryonic telencephalon. Two morphologically distinct regions of the basal ganglia are evident within the mature ventral telencephalon, the globus pallidus medially, and the striatum, which is positioned between the globus pallidus and the cortex. Deletion of the Sonic Hedgehog gene in mice indicates that ...