We investigate solutions of new massive gravity with two commuting Killing vectors, one of which is null, with a special emphasis on black hole solutions. Besides extreme BTZ black holes and, for a special value of the coupling constant, massless null warped black holes, we also obtain for a critical coupling a family of massive “log” black holes. These are asymptotic to the extreme BTZ black h...

A TBHP-mediated dehydrogenative cross-oxidative-coupling approach has been developed for the synthesis of N-arylbenzamides from methylarenes and acetanilides. This cross-coupling method is free of transition metal catalysts and ligands, and no extra organic solvents are required, which make it an useful and attractive strategy for the straightforward construction of C-N bonds. Besides, this con...

An efficient and general Fe(OTf)3-mediated oxidative coupling method was developed for the synthesis of doubly or triply linked porphyrin dimers. Besides the central metal and peripheral substituent, regioselectivity of the oxidative coupling was found to be closely relevant to the onset oxidation potential of the porphyrin substrate, and the reactant with higher E(onset(ox)) tends to generate ...

In this paper, we consider a leader-following consensus problem of a group of autonomous agents with time-varying coupling delays. Two different cases of coupling topologies are investigated. At first, a necessary and sufficient condition is proved in the case when the interconnection topology is fixed and directed. Then a sufficient condition is proposed in the case when the coupling topology ...

We investigate solutions of new massive gravity with two commuting Killing vectors, one of which is null, with a special emphasis on black hole solutions. Besides extreme BTZ black holes and, for a special value of the coupling constant, massless null warped black holes, we also obtain for a critical coupling a family of massive “log” black holes. These are asymptotic to the extreme BTZ black h...

An expanded set of sites, a more differentiated references and linguistic diversification have been discussed as needed changes in urban studies. The critiques the limitations studies, terms both scholarship scholars, offer important concrete responses to expanding scope field. Yet this tremendous special issue on ‘Comparative Methods for Global Urban Studies’ with 10 papers cutting across rang...

The development of silicon photonics provides a method implementing high reliability and precision for new micro-nano optical functional devices system-on-chips. asymmetric Fano resonance phenomenon caused by the mutual coupling resonant cavities is extensively studied. spectrum has an sharp slope near wavelength. wavelength range tuning transmission from zero to one much narrow in lineshape, t...