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 roller with a curvature of 5 to 7 mm. For the to...

Free-radical polymerization of styrene conducted in a spinning disc reactor (SDR) results significant increases conversion one pass, equivalent to few seconds residence time, with little change the number average and weight molecular weights polydispersity compared SDR feed pre-polymerized batch reactor. Results our experimental studies are presented this paper rationale, based on simulation st...

ABSTRACT We report spectral analysis of the persistent black hole X-ray binary, 4U 1957+115, using AstroSat, Swift, and NuSTAR observations carried out between 2016 2019. Modelling with a disc emission, thermal Comptonization, blurred reflection components revealed that source was in high-soft state flux ∼87 per cent total high-energy photon index ∼2.6. There is an evidence either inner radius ...

Thermal reverberation in accretion discs of active galactic nuclei is thought to be the reason continuum UV/optical time lags seen these sources. Recently, we studied thermal a standard Novikov-Thorne disc illuminated by an X-ray point-like source, and derived analytic prescription for as function wavelength. In this work, use fit time-lags spectra seven Seyferts, that have been intensively mon...

We report on X-ray flares that were observed from the active galactic nucleus I Zwicky 1 (I Zw 1) in 2020 January by NuSTAR and XMM-Newton observatories. The spectrum is well-described a model comprised of continuum emission corona its reflection accretion disc around rapidly spinning (a > 0.94) black hole. In order to broadband spectrum, it necessary account for variation ionisation across dis...

We study the half-light radius versus black hole mass as well luminosity relations in active galactic nuclei (AGN) when disc is illuminated by X-ray corona. used KYNSED, a recently developed spectral model for studying broadband energy distribution AGN. considered non-illuminated Novikov-Thorne discs and based on temperature radial profile. also case where profile modified colour-correction fac...

The development of micro-power generators for centrifugal microfluidic discs enhances the platform as a green point-of-care diagnostic system and eliminates the need for attaching external peripherals to the disc. In this work, we present micro-power generators that harvest energy from the disc's rotational movement to power biomedical applications on the disc. To implement these ideas, we deve...