in this paper, we investigate various kinds of extensions of twin-good rings. moreover, we prove that every element of an abelian neat ring r is twin-good if and only if r has no factor ring isomorphic to z2  or z3. the main result of [24] states some conditions that any right self-injective ring r is twin-good. we extend this result to any regular baer ring r by proving that every element of a...

Fast and robust detection of a small target in an infrared image is one the key techniques search track systems. The top-hat transformation important technology field detection. Many algorithms have been proposed to improve by modifying different structural elements. However, these methods can cause high false alarm rate under conditions dim targets, low signal-to-noise, complex background. To ...

The X-linked inhibitor of apoptosis protein (XIAP) contains three N-terminal BIR domains that mediate anti-apoptosis and one C-terminal RING finger domain whose function(s) are not fully defined. Here we show that the RING domain of XIAP strongly inhibits the expression of p63α, a known tumor suppressor. XIAP knockdown in urothelial cells or RING deletion in knockin mice markedly upregulates p6...

We analyze the impact of China's massive urban-transformation process on productivity spillovers for east-coast electrical apparatus sector by combining sub-prefecture-level population census data in 2000 and 2010 with detailed firm-level from 1999 to 2007. At sub-prefecture level, we identify three types regions (metro-core, metro-ring, non-metro) develop urban transformation measures (moderni...

In this paper, we propose a new variant of the NTRU public key cryptosystem − the MaTRU cryptosystem. MaTRU works under the same general principles as the NTRU cryptosystem, except that it operates in a different ring with a different linear transformation for encryption and decryption. In particular, it operates in the ring of k by k matrices of polynomials in R = Z[X]/(X−1), whereas NTRU oper...

A Pd(II)/Brønsted acid catalyzed migratory ring expansion for the synthesis of indene derivatives possessing a stereogenic spirocyclic carbon center was developed. This transformation is believed to mechanistically proceed via enantioselective allylic C-H activation with concomitant semipinacol ring expansion to the nascent π-allylpalladium species. Enantioselectivities as high as 98% ee were a...

In this paper we consider the Moutard transformation [9] which is a twodimensional version of the well-known Darboux transformation. We give an algebraic interpretation of the Moutard transformation as a conjugation in an appropriate ring and the corresponding version of the algebro-geometric formalism for two-dimensional Schrödinger operators. An application to some problems of the spectral th...