NASA's Transiting Exoplanet Survey Satellite (TESS) mission is expected to discover hundreds of planets via single transits first identified in their light curves. Determining the orbital period these transit candidates typically requires a significant amount follow-up work observe second or measure radial velocity orbit. In Yao et al. (2019), we developed simulations that demonstrated ability ...

In this paper, we investigate the notions of X ⊥ -projective, id="M2"> -injective, and id="M3"> -flat modules give some characterizations these modules, where id="M4"> is a class left modules. We prove that all id="M5"> -projective Kaplansky. Further, if id="M6"...

In this article, we study a recently proposed method for improving empirical security of steganography in JPEG images which the sender starts with an additive embedding scheme symmetrical costs ± 1 changes and then decreases cost one these based on image obtained by applying deblocking (JPEG dequantization) algorithm to cover JPEG. This approach provides rather significant gains at negligi...

Let $R$ be a commutative Noetherian ring. We prove that  over a local ring $R$ every finitely generated $R$-module $M$ of finite Gorenstein projective dimension has a Gorenstein projective cover$varphi:C rightarrow M$ such that $C$ is finitely generated and the projective dimension of $Kervarphi$ is finite and $varphi$ is surjective.

acetylene dose due to the high supply of hydrogen. Moreover, methane should not be formed, since there should not be any dissociation of acetylene on the surface. Figure 11 shows the result of an experiment in which the surface was precovered with a monolayer of hydrogen. The first dose of acetylene (0.2 X 1015 molecules of C2H2 cm-2) leads to an enormous increase in the hydrogen pressure and t...