Let G be a (p,q) graph and A be a group. We denote the order of an element $a in A $ by $o(a).$  Let $ f:V(G)rightarrow A$ be a function. For each edge $uv$ assign the label 1 if $(o(f(u)),o(f(v)))=1 $or $0$ otherwise. $f$ is called a group A Cordial labeling if $|v_f(a)-v_f(b)| leq 1$ and $|e_f(0)- e_f(1)|leq 1$, where $v_f(x)$ and $e_f(n)$ respectively denote the number of vertices labelled w...

We report results of a search for an isotropic gravitational-wave background (GWB) using data from Advanced LIGO's and Virgo's third observing run (O3) combined with upper limits the earlier O1 O2 runs. Unlike in previous runs advanced detector era, we include Virgo GWB. The are consistent uncorrelated noise, therefore place on strength find that dimensionless energy density $\Omega_{\rm GW}\le...

Absorption measurement is an exceptionally versatile tool for many applications in science and engineering. For absorption measurements using laser beams of light, the sensitivity theoretically limited by shot noise due to fundamental Poisson distribution photon number radiation. In practice, shot-noise limit can only be achieved when all other sources are eliminated. \textcolor{black}{Here, we...

A theoretical framework has been developed for the study of the nonlinear gravitational (g-) mode of a line-tied flux tube near marginal stability. The theory is based on an expansion using two small parameters, ∼ |ξ|/Leq 1, and n−1 ∼ k‖/k⊥ 1, with ξ denoting the plasma displacement, Leq the characteristic equilibrium scale, k‖ and k⊥ the dominant wavenumber of perturbation parallel and perpend...

This collective case study documented university choral students’ (N = 4) hearing doses, acquired through Etymotic Personal Noise Dosimeters (ER200D), as they rehearsed and performed a program of opera choruses during five time periods in three venues. Acquisition periods included one choir only rehearsal, two choir-orchestra-soloist rehearsals, and two public performances with choirorchestra-s...

This study estimates the equivalent continuous sound pressure level (Leq) during peak daily periods (‘rush hour’) along New Klang Valley Expressway (NKVE) in Shah Alam, Malaysia, using a land use regression (LUR) model based on machine learning, statistical regression, and geographical information systems (GIS). The research utilises two types of soft computing methods including learning (i.e.,...

We propose a $B-L$ model combined with the $S_4\times Z_3\times Z_4$ discrete symmetry which successfully explains recent $3+1$ sterile - active neutrino data. The smallness of mass is obtained through type-I seesaw mechanism. active-active and sterile-active mixing angles are predicted to be consistent constraints in $0.3401\, (0.3402) \leq \sin^2\theta_{12}\leq 0.3415\, (0.3416), \, 0.456\, (...

Noise-induced hearing loss (NIHL) is caused by cumulative occupational and non-occupational noise exposure. The National Institute for Occupational Safety Health (NIOSH) developed exposure recommendations (85 dBA 8-hour time-weighted average) in 1972. Fifty years later, the NIOSH recommended limit (REL) needs to be revised downwards. In its calculations, assumed that workers have quiet when not...

Airguns used in seismic surveys are among the most prevalent and powerful anthropogenic noise sources in marine habitats. They are designed to produce most energy below 100 Hz, but the pulses have also been reported to contain medium-to-high frequency components with the potential to affect small marine mammals, which have their best hearing sensitivity at higher frequencies. In shallow water e...