Cosmological models predict that galaxies forming in the early Universe experience a chaotic phase of gas accretion and star formation, followed by ejection due to feedback processes. Galaxy bulges may assemble later via mergers or internal evolution. Here we present submillimeter observations (with spatial resolution 700 parsecs) ALESS 073.1, starburst galaxy at redshift z~5, when was 1.2 bill...

The performance of an externally pressurized gas journal bearing lubricated with R134a vapor used in oil-free refrigeration centrifugal compressor is calculated by solving Reynold equations the finite difference method (CFD). load capacity, stiffness and mass flow rate refrigerant under conditions various operational parameters are obtained compared that air bearings. In addition, influences av...

Motor-spindles are belong to a special class of complex dynamic systems natural and natural-anthropogenic origin, which can be realized both translational rotational motion, represent variety developing species. Such used in metalworking complexes, lathes, milling, drilling, grinding, multi-purpose other machines. In modern designs spindle units rolling bearings, hydrostatic, hydrodynamic, gas-...

Abstract To analyze the trajectory deflection of a noncircular cross-section projectile penetrating into multiple metal targets, numerical simulations with different impact velocities, tip height and charge geometry are conducted. The simulation model is established using finite element software LS-DYNA verified based on experiment carried out by single-stage light gas gun. results show that ve...