Zobrazeno 1 - 10
of 59
pro vyhledávání: '"Michael S. Stix"'
Publikováno v:
Astronomy & Astrophysics. 459:935-944
Aims. The latitude and depth dependences of Reynolds stresses are obtained from numerical simulations of a solar-type convection zone where the star is assumed to rotate with a uniform angular velocity. Methods. A two-dimensional model, using a cylin
Publikováno v:
Proceedings of the International Astronomical Union. 2:437-442
We study convective overshooting by means of local 3D convection calculations. Using a mixing length model of the solar convection zone (CZ) as a guide, we determine the Coriolis number (Co), which is the inverse of the Rossby number, to be of the or
Autor:
Y. D. Zhugzhda, Michael S. Stix
Publikováno v:
Astronomy & Astrophysics. 418:305-312
We investigate the modulation of acoustic wave modes by convection. We consider a cavity that encloses a layer of convection rolls. The stratification due to gravity is taken into account. For the acoustic oscillation we use a harmonic expansion for
Autor:
Michael S. Stix
Publikováno v:
Astronomy & Astrophysics. 415:751-754
This note deals with magnetohydrodynamic body waves in a magnetic cylinder. It is shown that the solution obtained by the thin-tube expansion is, term by term, identical to the Taylor expansion of the exact solution. Each level of approximation adds
Autor:
M. Roth, Michael S. Stix
Publikováno v:
Astronomy & Astrophysics. 405:779-786
We investigate the effects of a large-scale time-dependent flow in the solar convection zone on the solar p -mode oscillations. The theory of time-dependent perturbations is applied, and we concentrate on flow fields that can be described by a single
Autor:
Michael S. Stix
Publikováno v:
Solar Physics. 212:3-6
It is pointed out that the time scale of energy transport in the Sun is the Kelvin–Helmholtz time scale, of order 3×107 years, roughly 100 times longer than the photon-diffusion time estimated by Mitalas and Sills (1992). The difference correspond
Publikováno v:
Astronomy & Astrophysics. 393:305-319
We study the polarization of spectral lines in the penumbra by integrating the radiative transfer equation of polarized light for a three-dimensional model atmosphere of a sunspot. In this model, the Evershed flow is confined to magnetic flux tubes w
Publikováno v:
Anesthesia & Analgesia. 94:1036-1039
IMPLICATIONS Esophageal insufflation can occur simultaneously with venting from the drain tube during positive pressure ventilation with the ProSeal laryngeal mask airway.
Publikováno v:
Astronomy & Astrophysics. 381:L77-L80
The net circular polarization, N , is used as a measure for the asymmetry of Stokes- V profiles: $N\equiv\int V(\lambda)\,{\rm d} \lambda$, integrated over an absorption line. Exemplary for Fe I 630.2 nm and Fe I 1564.8 nm, we synthesize penumbral V
Publikováno v:
Canadian Journal of Anesthesia/Journal canadien d'anesthésie. 48:795-799
Purpose To present a stepwise training method, first critiquing laryngeal mask (LM) insertion difficulty and malpositioning, then learning how to exchange an endotracheal tube (ETT) for a LM during emergence from anesthesia.