Let R be a commutative ring with identity and M an R-module. In this paper, we associate a graph to M, sayΓ(RM), such that when M=R, Γ(RM) coincide with the zero-divisor graph of R. Many well-known results by D.F. Anderson and P.S. Livingston have been generalized for Γ(RM). We Will show that Γ(RM) is connected withdiam Γ(RM)≤ 3 and if Γ(RM) contains a cycle, then Γ(RM)≤4. We will also show tha...

The merger of two or more galaxies can enhance the inflow material from galactic scales into close environments Active Galactic Nuclei (AGN), obscuring and feeding supermassive black hole (SMBH). Both recent simulations observations AGN in mergers have confirmed that are related to strong nuclear obscuration. However, it is still unclear how obscuration evolves last phases process. We study a s...

Polymerization characteristics of 4 types of ethyl methacrylate (EMA)-based resin, composed of EMA and EMA/methyl methacrylate (MMA) copolymers and initiated by tributylborane (TBB), were studied from the aspects of long term changes of residual monomer (RM) and molecular weight (Mw). The resins were polymerized at room temperature for 30 min, stored at 37 degrees C for 24 hr, 1 and 4 weeks and...

BACKGROUND Mechanical ventilation (MV) may induce lung injury. AIMS To assess and evaluate the role of different mechanical ventilation strategies on ventilator-induced lung injury (VILI) in comparison to a strategy which includes recruitment manoeuvre (RM). STUDY DESIGN Randomized animal experiment. METHODS Thirty male Sprague-Dawley rats were anaesthetised, tracheostomised and divided i...

We investigate the contribution of extended radio sources such as Centaurus A, and Galactic supernova remnants (SNRs) to our ability detect statistical $21\,\rm{cm}$ signal from Epoch Reionisation (EoR) with Murchison Widefield Array (MWA). These are typically ignored because they in highly attenuated parts MWA primary beam, however aggregate these have apparent flux densities $10\,\rm{Jy}$ on ...

The search for extraterrestrial intelligence (SETI) has been conducted nearly 60 years. A Dyson Sphere, a spherical structure that surrounds star and transports its radiative energy outward as an source advanced civilisation, is one of the main targets SETI. In this study, we discuss whether building Sphere around black hole effective. We consider six sources: (i) cosmic microwave background, (...