We investigate the gas mass function of clusters of galaxies to measure the density fluctuation spectrum on cluster scales. The baryon abundance confined in rich clusters is computed from the gas mass function and compared with the mean baryon density in the universe which is predicted by the Big Bang Nucleosynthesis. This baryon fraction and the slope of the gas mass function put constraints o...

Effect of temperature on hydrodynamics of bubbling gas-solid fluidized beds was investigated.  Experiments were carried out in the range of 25-600 ºC and different superficial gas velocities in the range of 0.17-0.78 m/s with sand particles. Time-position trajectory of particles was obtained by radioactive particle tracking technique. These data were used for determination of mean velocitie...

We present results from a study of molecular gas and dust in the vicinity of the Herbig Haro object HH2. Emission from the sub-mm continuum, 12 CO and HCO + was mapped with angular resolutions ranging from 14 ′′ to 5 ′′ (or 0.01 pc at the distance of HH2). The continuum shows an extended dust clump of mass 3.8M ⊙ and temperature 22K, located downstream of the bright optical HH knots. However, a...

The ambipolar electrostatic potential rising along the magnetic field line from grounded wall to centre in linear gas dynamic trap, rules available suppression of axial heat and particle losses. In this paper, visible range optical diagnostic is described using Doppler shift plasma emission lines for measurements accelerating drop. We used room temperature hydrogen jet puffed directly on sight ...

in this paper, genetic algorithms (gas) are employed to control simultaneous linear systems in both state and output feedback. first, the similarity transformation is applied to obtain parameterized controllers. this requires solution of a system of equations and also some non-linear inequalities. gas are used to solve these equations and inequalities. therefore, the paper presents an analytica...