The Newman-Penrose-Perjes formalism is applied to Sasakian 3-manifolds and the local form of the metric and contact structure is presented. The local moduli space can be parameterised by a single function of two variables and it is shown that, given any smooth function of two variables, there exists locally a Sasakian structure with scalar curvature equal to this function. The case where the sc...

In this paper 1 we propose a combination of PLA decomposition and unidirectional error detecting techniques which permits concurrent testing for all single faults in a circuit (both in the decomposed modules and on the interconnection lines), for a lower area overhead cost than is normally associated with unidirectional error detecting codes.

the genus conophorus meigen, 1803 (diptera: bombyliidae: conophorini) was studied in the north and northwestern parts of iran. three species of the genus conophorus were identified; two of them are recorded for the first time from iran, namely: c. pseudaduncus paramonov, 1929 and c. rjabovi paramonov, 1929, in addition to c. glaucescens (loew, 1863), which was previously recorded in iran. morph...

The idea that technological revolutions can explain major swings in stock market value is occupying an increasingly prominent role in the literature on the economics of financial markets. Both the 1990s and the 1920s stock market runups have been linked to the arrival of new technologies and the accumulation of intangible capital by firms (Robert Hall 2001; Bart Hobijn and Boyan Jovanovic 2001;...

Rev Bras Cir Cardiovasc | Braz J Cardiovasc Surg rofessor Adib Domingos Jatene, indelible mark of pioneering spirit, honesty, wisdom and accurate surgical technique, left this life on the 14th of November. It saddened the entire Brazilian nation, impoverished without his striking and distinguished presence, always dedicated to healing the heart of ill patients and Brazil’s flaws. It especially ...

p. v . . . . The office of physical science is to discover those properties and relations of things in virtue of which they are capable of being used as instrumentalities; physical science makes claim to disclose not the inner nature of things but only those connections of things with one another that determine outcomes and hence can be used as means. The intrinsic nature of events is revealed ...

The Reproducibility Project: Cancer Biology seeks to address growing concerns about reproducibility in scientific research by conducting replications of 50 papers in the field of cancer biology published between 2010 and 2012. This Registered Report describes the proposed replication plan of key experiments from "Melanoma genome sequencing reveals frequent PREX2 mutations" by Berger and colleag...

We employ techniques from the theory of disintegration of measures to study the Lifting Problem for commuting n-tuples of subnormal weighted shifts. We obtain a new necessary condition for the existence of a lifting, and generate new pathology associated with bringing together the Berger measures associated to each individual weighted shift. For subnormal 2-variable weighted shifts, we then fin...