We measure the velocities of the mean flows that are driven by curved rolls in a pattern formation system. Curved rolls in Faraday waves are generated in experimental cells consisting of channels with varying widths. The mean flow magnitudes are found to scale linearly with roll curvatures and squares of wave amplitudes, agreeing with the prediction from the analysis of phase dynamics expansion...

AIM The aim of this observational study was to investigate the intake of dietary fibre and its sources among Polish adolescents according to prevalence of overweight after adjustment for age and gender. METHODS The study sample consisted of 1,565 students, including 48% boys and 52% girls aged 13-18 with normal weight, overweight and obesity. Dietary information was reported using the Block S...

Two calculation methods are mainly implemented during the construction as well as modeling of the rolling rolls. These are: deterministic (classical) and probabilistic – calculation based on reliability. When using deterministic method, starting point considers that the workloads as well as material specifications are invariable values. However, in reality, rolling rolls are burdened with varia...

Turbulence motions are often perceived as chaotic and unstructured. It has been observed however that the turbulence is frequently organized in semi-regular, persistent and large-scale coherent structures in realistic boundary layers. This study investigates such coherent structures, called rolls, in the non-stratified (Ekman) boundary layer on a rotated planet (the Earth). Large-eddy simulatio...

Observations during the Convection and Precipitation/Electrification (CaPE) project illustrate that horizontal convective rolls are capable of providing sufficient forcing to initiate free moist convection. Rolls occurred on the majority of days during CaPE but on only some of those days were they able to trigger thunderstorms. This study was undertaken to ascertain the difference between the t...

We study the motion of a grain boundary that separates two sets of mutually perpendicular rolls in Rayleigh-Bénard convection above onset. The problem is treated either analytically from the corresponding amplitude equations, or numerically by solving the Swift-Hohenberg equation. We find that if the rolls are curved by a slow transversal modulation, a net translation of the boundary follows. W...

We describe a numerical procedure to construct a modified velocity field that does not have any mean flow. Using this procedure, we present two results. First, we show that, in the absence of the mean flow, spiral defect chaos collapses to a stationary pattern comprising textures of stripes with angular bends. The quenched patterns are characterized by mean wave numbers that approach those uniq...

A review of the literature was conducted to find publications relating to neck collars / rolls and prevention of sports injury, particularly burners and other cervical spine injuries, as well as in preventing excessive motion of the cervical spine. MEDLINE (1970-2005), Cinahl (1982-2005), Alt Health Watch (1990-2005), AMED (1995-2005), and the Index to Chiropractic Literature (1985-2005) databa...

The instability of convection rolls in a fluid layer heatet from below is studied in the case where the layer rotates about an axis slightly inclined with respect to the vertical. The inclination destroys the horizontal isotropy of the layer, but the instability of rolls found by Küppers and Lortz [1] is little affected as long as the angle of inclination is small. A new effect is the generatio...

Introduction The ongoing risks of healthcare-acquired infections (HAIs) are prompting hospitals to seek new methods for reducing cross-contamination. Switching to shorter rolls of medical tapes can provide an important opportunity to decrease cross-contamination, eliminate wasted tape, decrease hospital supply costs and improve the standard of patient care. “... Rolls of tape cannot be decontam...