At low flow rate operation, Francis turbines feature a cavitating vortex rope in the draft tube resulting from the swirling flow of the runner outlet. The unsteady pressure field related to the precession of the vortex rope induces plane wave propagating in the entire hydraulic system. The frequency of the vortex rope precession being comprised between 0.2 and 0.4 times the turbine rotational s...

[1] Simultaneous observations obtained by the Solwind coronagraph and Faraday rotation of the Helios radio frequency carrier signal in 1979 showed that CMEs produce characteristic ‘W’ or sigmoid transients in Faraday rotation observations similar to those observed by Pioneer 6 and 9 in 1968 and 1970. We demonstrate that a relaxed flux-rope model is capable of reproducing these observations. Thr...

WALLACE, ROBERT B., and ALTMAN, JOSEPH (1969). Behavioral Eflects of Neonatal Irradiation of the Cerebellum. I I . Quantitative Studies in Young-adult and Adult Rats. DEVELOPMENTAL PSYCHOBIOLOGY, Z(4): 26e-272. Young adult and adult rats whose cerebellum was focally irradiated with a variable number of daily doses of 200 r X-ray during infancy were tested for spontaneous locomotion, in activity...

The solar active region NOAA 12887 produced a strong X1.0 flare on 2021 October 28, which exhibits X-shaped ribbons and circle-shaped erupting filament. To understand the eruption process with these characteristics, we conducted data-constrained magnetohydrodynamics simulation using nonlinear force-free field of about an hour before as initial condition. Our reproduces filament observed in Ha i...