In recent years, low Earth orbit (LEO) satellites have been frequently discussed for their benefits in positioning and navigation services as an augmentation to the global satellite systems (GNSSs). Similar concept based on ranging GNSS satellites, precise of single-receiver users needs high-accuracy orbits clocks LEO a pre-condition. For real-time users, high prediction accuracies these at dif...

In coded aperture imaging the attainable quality of the reconstructed images strongly depends on the choice of the aperture pattern. Optimum mask patterns can be designed from binary arrays with constant sidelobes of their periodic autocorrelation function, the so{called URAs. However, URAs exist for a restricted number of aperture sizes and open fractions only. Using a mismatched lter decoding...

The structure of a Nova protein K homology (KH) domain recognizing single-stranded RNA has been determined at 2.4 A resolution. Mammalian Nova antigens (1 and 2) constitute an important family of regulators of RNA metabolism in neurons, first identified using sera from cancer patients with the autoimmune disorder paraneoplastic opsoclonus-myoclonus ataxia (POMA). The structure of the third KH d...

The 4.4 kb EcoRI fragment of the 25 kb extrachromosomal ribosomal DNA circle of Entamoeba histolytica (1,2) contains a stretch of tandem Dral repeats (2). We have demonstrated autonomously replicating sequence (ARS) activity in this 4.4 kb EcoRI fragment by cloning it in the yeast shuttle vector, YIP5, which lacks an ARS. The resulting construct (pYHM-d) could transform ura3 his5 Saccharomyces ...

We constructed strains of Saccharomyces cerevisiae that contained two different mutant alleles of either the leu2 gene or the ura3 gene. These repeated genes were located on chromosomes V and XII and the two leu2- alleles were located on chromosomes III and XII. Genetic interactions between the two mutant copies of a gene were detected by the generation of either Leu+ or Ura+ revertants. Both s...

Atualmente, a Unidade de Resposta Audível (URA) é o principal meio comunicação entre empresas e clientes. O cliente pode realizar ligações para prestadora serviços através da discagem direta gratuita fim obter informações ou até mesmo automações como por exemplo: fazer informe pagamento no atendimento eletrônico sem necessidade do humano. Para melhorar performance desse formato será apresentada...

BackgroundOptimal management for ischemic mitral regurgitation (IMR) is controversial. Current evidence supports replacement over repair due to improved durability however the latter often involves undersizing with a complete ring and does not include edge-to-edge approximation.Methods ResultsThis single-center retrospective study of patients undergoing surgery at time revascularization moderat...

The core requirement of massive Machine-Type Communication (mMTC) is to support reliable and fast access for an enormous number machine-type devices (MTDs). In many practical applications, the base station (BS) only concerns list received messages instead source information, introducing emerging concept unsourced random (URA). Although some multiple-input multiple-output (MIMO) URA schemes have...