Stellar winds are an important aspect of our understanding of the evolution of massive stars and their input into the interstellar medium. Here we present solutions for the velocity field and mass-loss rates for stellar outflows as well as for the case of mass accretion through the use of the so-called Lambert W-function. For the case of a radiation-driven wind, the velocity field is obtained a...

We study energy dissipation and heating by supersonic MHD turbulence in molecular clouds using Athena, a new higher-order Godunov code. We analyze the dependence of the saturation amplitude, energy dissipation characteristics, power spectra, sonic scaling, and indicators of intermittency in the turbulence on factors such as the magnetic field strength, driving scale, energy injection rate, and ...

Four spatially resolved near-UV raster scans across the chromospheric disk of α Ori, obtained with the Space Telescope Imaging Spectrograph on the Hubble Space Telescope reveal mean chromospheric infall from 1998 January to 1998 April, which reversed to upflow in deeper layers between 1998 September and 1999 March. In 1998 September we detect systematic reversals in the component maxima of four...

We present non-LTE calculations for an expanding red giant’s atmosphere ionized from the outside by the radiation of a nearby hot radiation source. We show that the hydrogen emission lines emerge from a narrow transition zone where hydrogen changes from ionized to neutral. In this region the Balmer lines are optically thick, and their profiles crucially depend on the magnitude of optical thickn...

Some typical problems solved by the combination and the complementary use of different investigation techniques such as boroscopy, radar and sonic tests, flat-jack and sonic tests, sonic and radar tomography and others will be presented. Résumé On présente quelques problèmes typiques concernant bâtiments historiques, résolus par l’usage de techniques d'enquête complémentaires, telles que la bor...

In this poster, we describe the design and research phase of a project that aims to create conditions for heightened sonic perception through a mobile phone based software application. The initial design concept is that of an aural architecture for sonic socio-cultural exchange where sonic realities of the everyday are improvised live in a non-linear mode. The design approach adopted is collabo...

Квазигидродинамическая система была предложена Шеретовым Ю.В. в 1993 году. Известные точные решения этой системы подавляющем большинстве случаев удовлетворяют либо уравнениям Навье-Стокса, Эйлера. В настоящей работе описан новый класс точных решений квазигидродинамической системы, которые не ни Соответствующие Навье-Стокса получаются из построенных предельным переходом при $c_s\to +\infty$, где...

Abstract Nacelle lidars with different number of beams, scanning configurations and focus distances are simulated for characterizing the inflow turbulence. Lidar measurements within 100 turbulence wind fields described by Mann model. The reference turbine has a rotor diameter 52 m. We assume homogeneous frozen over lidar area. lidar-derived Reynolds stresses computed from least-square procedure...

Sonic hedgehog promotes proliferation of developing cerebellar granule cells. As sonic hedgehog is expressed in the cerebellum throughout life it is not clear why proliferation occurs only in the early postnatal period and only in the external granule cell layer. We asked whether heparan sulfate proteoglycans might regulate sonic hedgehog-induced proliferation and thereby contribute to the spec...

Microencapsulation is a process in which solid, liquid or gas components are covered with a septum.The present study has focused on the effect of stirring to produce ferric saccharide capsules withalginate coating applying the coacervation method so that we can obtain the best capsules forfortification of hydrated and dehydrated food products. At first, three methods, including stirrer,ultra-so...