RESUMO
The second Venus flyby of the BepiColombo mission offer a unique opportunity to make a complete tour of one of the few gas-dynamics dominated interaction regions between the supersonic solar wind and a Solar System object. The spacecraft pass through the full Venusian magnetosheath following the plasma streamlines, and cross the subsolar stagnation region during very stable solar wind conditions as observed upstream by the neighboring Solar Orbiter mission. These rare multipoint synergistic observations and stable conditions experimentally confirm what was previously predicted for the barely-explored stagnation region close to solar minimum. Here, we show that this region has a large extend, up to an altitude of 1900 km, and the estimated low energy transfer near the subsolar point confirm that the atmosphere of Venus, despite being non-magnetized and less conductive due to lower ultraviolet flux at solar minimum, is capable of withstanding the solar wind under low dynamic pressure.
RESUMO
This study was designed to determine criteria of normality of peri-ungual capillaroscopy of the toes. The equipment used was a Leitz microscope fitted with a 150 W cold light lighting system. The study involved a population of 84 healthy individuals. Intra-judge and inter-judge concordance tests were carried out, indicating results to be reliable. Capillaroscopy of the hand (reference norms) and capillaroscopy of the feet (with the subject sitting with the legs hanging) were carried out in each case. Examination of the feet was perfectly possible in only 87% of cases. Results showed that the majority of criteria of normality of peri-ungual capillaroscopy of the hand were also found in the foot, whilst others were different (number of capillary loops per millimetre which was on average less, the number of minor dystrophic forms which could be very great, the length of capillary loops which were slightly shorter and background colour which was paler). Finally, certain were not found (peri-capillary haziness more frequent because of physiological oedema and frequent irregularity in the distribution of capillary loops). No major dystrophy was seen and traumatic hemorrhages were no more frequent in the foot than in the hand.