It is well known that the observed amplitude of solar oscillations is lower in sunspots than in quiet regions of the Sun. We show that this local reduction in oscillation amplitudes combined with the phase-speed filtering procedure in time-distance helioseismic analyses could be a source of systematic errors in the range of 5 40% in the measured travel-time anomalies of acoustic waves around su...

We model solar spectral irradiance variations under the assumption that they are produced by sunspots and faculae alone. The model is based on three components, i.e. quiet Sun, assumed to be temporally invariant, sunspots and faculae whose temporal variations are mimicked using time series of sunspot areas and Mg II core-to-wing ratios. The detailed flux spectrum for each component is employed....

Small-angle neutron scattering (SANS) studies clearly demonstrate a reinforcement of the nematic "jacketed" structure as the degree of polymerization decreases for a "sideon fixed" liquid crystal polysiloxane. In addition, we show that the dilution of the mesogenic content in a copolymeric homologous strongly reduces the anisotropy of the global polymer

The possibility of the clouds of Venus providing habitats for extremophilic microorganisms has been discussed for several decades. We show here that the action of the solar wind leads to erosion of parts of the atmosphere laden with aerosols and putative microorganisms, forming a comet-like tail in the antisolar direction. During inferior conjunctions that coincide with transits of the planet V...

Bright EUV sunspot plumes have been observed in five out of nine sunspot regions with the Coronal Diagnostic Spectrometer – CDS on SOHO. In the other four regions the brightest line emissions may appear inside the sunspot but are mainly concentrated in small regions outside the sunspot areas. These results are in contrast to those obtained during the Solar Maximum Mission, but are compatible wi...

Westudy the radiative transfer processes occurring in a plane-parallel slab standing vertically above the chromosphere and moving upward as a solid body. This structure simulates a prominence in the phase of eruption or a quiescent prominence where the plasma presents bulk velocities. We use partial redistribution for the description of the resonance scattering in the hydrogen Lα and Lβ lines. ...

An inhalation exposure chamber, referred to as the Small Animal Inhalation Rig (SAIR) has been designed to expose test subjects to inhalation aerosols whilst minimising the amount of compound used. This inhalation chamber may be employed for acute inhalation studies with dry powder aerosols involving mice, rats or guinea pigs. This rig consists of two main parts; a fluidised bed aerosol generat...

ACKNOWLEDGEMENTS This material is based upon work supported in part by the National Reconnaissance Office (NRO) and the Office of Naval Research (ONR). Any opinions, findings, conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect those of the sponsors.

Aims. We test the reliability of the observed and calculated spectral irradiance variations between 200 and 1600 nm over a time span of three solar rotations in 2004. Methods. We compare our model calculations to spectral irradiance observations taken with SORCE/SIM, SoHO/VIRGO and UARS/SUSIM. The calculations assume LTE and are based on the SATIRE (Spectral And Total Irradiance REconstruction)...

− The results of a comparison in differential pressure between CEM-Spain and CENAM-Mexico are presented here. The comparison was performed in 2008. A high accuracy digital manometer was used for the comparison. The manometer had good behaviour during the period of the comparison, having a small drift which had no effect in the comparison. The results of the measurements showed very good agreeme...