Element diffusion is expected to occur in all kinds of stars : according to the relative effect of gravitation and radiative acceleration, they can fall or be pushed up in the atmospheres. Helium sinks in all cases, thereby creating a gradient at the bottom of the convective zones. This can have important consequences for the sound velocity, as has been proved in the sun with helioseismology.

Groups of galaxies are highly linked to cosmology: 1) groups are tidally destroyed by the tidal eld of the cluster they fall into; 2) spherical infall leads to the young cosmo-dynamical state of loose groups, a fundamental surface for groups, 0 ' 0:3, and the mixed nature of compact groups (virialized groups, groups at full collapse, and chance alignments within collapsing loose groups, for dec...

AIM To document the effects of indomethacin (IND) on coronary flow. METHODS We studied nine premature lambs during the first day of life. The gestational age varied between 132 and 134 days (term 145 days) and weight 3.1-4.7 kg. Coronary flow velocities were recorded with an intracoronary Doppler guide wire in the proximal left anterior descending coronary artery (LAD). Average peak flow velo...

The effects of inhaled stable xenon gas on cerebral blood flow were studied with 23 transcranial Doppler examinations performed in 13 normal volunteers while breathing, 25, 30, or 35% xenon for 5 min. Doppler velocities from the middle cerebral artery rose significantly during inhalation in 85% of subjects and 78% of studies and decreased significantly in 15% of subjects and 17% of studies. The...

Rain cleans pollution out of the atmosphere, as droplets collide with airborne particles during free fall. Such particle–droplet collisions have been presumed to be capture events, but details such lack thorough investigation. We show that rain and interact through multiple collision behaviours, including captures on droplet surface, cavity-forming entries ricochets. drop diameter fall velocity...

In this study, to predict the formation of free-fall arch via granular flow through an aperture, analytical model has been developed based on particle-scale force equilibrium. This calculates size and location meta-stable can be extended rate. According model, a is independent height stress state above arch, where only particle size, aperture friction influence development arch. Besides, propos...

OBJECTIVES We hypothesized that variability in voluntary movement paths of assisted living facility (ALF) residents would be greater in the week preceding a fall compared with residents who did not fall. DESIGN Prospective, observational study using telesurveillance technology. SETTING Two ALFs. PARTICIPANTS The sample consisted of 69 older ALF residents (53 female) aged 76.9 (SD ± 11.9 y...

We report on a preliminary measurement of time-dependent CP -violating asymmetries in B ! J= K S and B ! (2S)K S decays recorded by the BABAR detector at the PEP-II asymmetric B Factory at SLAC. The data sample consisted of 9.0 fb 1 collected at the (4S) resonance and 0.8 fb 1 o -resonance. One of the pair of neutral B mesons produced at the (4S) was fully reconstructed, while the avor of the o...

We present here recent results on the investigations of the mass spectrum ( S-states and P-states), decay constants, decay widths and life time of the D, Ds,and Bcmesons within the framework of phenomenological potential models.We also present the binding energy and the masses of the di-meson molecular systems with one or more charm meson combinations. Many of the newly found experimental open ...

Certain materials "decay" at the atomic level over a period of time, giving off "radiation" in the form of energy or subatomic particles. This radiation can be harnessed and used for a variety of industrial applications. Some of the commonest of these which are used in New Zealand are listed below, although many others exist that are either only used to a small extent or used exclusively overseas.