We investigate the nucleosynthesis of heavy elements in the winds ejected by accretion discs formed in neutron star mergers. We compute the element formation in disc outflows from hypermassive neutron star (HMNS) remnants of variable lifetime, including the effect of angular momentum transport in the disc evolution. We employ long-term axisymmetric hydrodynamic disc simulations to model the eje...

ABSTRACT We report on the Insight-HXMT observations of new black hole X-ray binary MAXI J1820+070 during its 2018 outburst. Detailed spectral analysis via continuum fitting method shows an evolution inferred spin high soft sate. Moreover, hardness ratio, non-thermal luminosity and reflection fraction also undergo evolution, exactly coincident to period when transition takes place. The unphysica...

We present numerical simulations of misaligned discs around a spinning black hole covering range parameters. Previous have shown that are strongly warped by forced precession -- in this case the Lense-Thirring effect from can break apart into discrete or rings behave quasi-independently for short timescales. With we here, confirm thin and highly inclined more susceptible to disc tearing than th...

Regarding the importance of ring spinning method among spinning systems, great potentials exist for research about on the improvement of the quality and properties of ring spun yarn. This study aims to improve yarn quality by changing the shape and dimensions of spinning triangle through forming a groove in the middle zone of the front darfting &#10roller with a curvature of 5 to 7 mm. For the ...

Metal spinning as a kind of manufacturing process has capability to shape hollow components. In present work shear spinning process is used to formplates into conical shapes. Moreover, the aim of this research is to demonstrate the impact of the process parameters (i.e. feeding rate and spindle speed) on wall thickness. This approachwas done by experimental and finite elements method. The resul...

The burst mode of accretion in massive star formation is a scenario linking the initial gravitational collapse parent pre-stellar cores to properties their gravitationally unstable discs and accretion-driven bursts. In this study, we present series high-resolution 3D radiation-hydrodynamics numerical simulations for young stars formed out collapsing 100 Mo molecular spinning with several values...