With improved B 0 homogeneity along with satisfactory gradient performance at high magnetic fields, snapshot gradient-recalled echo-planar imaging (GRE-EPI) would perform at long echo times (TEs) on the order of T2*, which intrinsically allows obtaining strongly T2*-weighted images with embedded substantial anatomical details in ultrashort time. The aim of this study was to investigate the feas...

Buried water and gas pipe systems form part of critical infrastructure providing essential services to the community. In many global population centres including in Australia, this vital infrastructure has been installed several decades ago, and dealing with frequent pipe failures become a major problem. There are clear evidences that pipe failures significantly depend on pipe strains induced b...

This paper determines most common model of in-pipe robots to derive its degree of freedom in order to compare with the necessary degree of freedom required for a system to move inside pipelines freely in order to derive analytical reason for losing control of in-pipe robots at branched pipe. DOF of most common mechanism in in-pipe robots can be calculated by considering the robot as a parallel ...

As oil and natural gas production continue to go deeper into the ocean, flexible riser, as a connection surface of marine channel, will confront greater problems in its practical application. Composite materials are being considered replace steel unbonded pipe order successfully meet lightweight high-strength criteria ultra-deep-water production. The carbon-fiber-reinforced material substitutes...

Bacterial GreA and GreB promote transcription elongation by stimulating an endogenous, endonucleolytic transcript cleavage activity of the RNA polymerase. The structure of Escherichia coli core RNA polymerase bound to GreB was determined by cryo-electron microscopy and image processing of helical crystals to a nominal resolution of 15 A, allowing fitting of high-resolution RNA polymerase and Gr...

— 11 is well-known that thefamily of context-free languages is a full principal AFL. It thus contains a largestfûll sub-AFL, denoted Nge, consisting ofthe languages which are notfull generators. One ofthe major problems (still unsolved) is to know whether this AFL is principal or not. The main resuit in this direction states that Ngestrictly contains thefamily Gre ofthe Greibach languages ( — t...

Materials and Methods: This retrospective study was approved by the institutional review board. Thirty-eight patients (24 male, 14 female; mean age, 33 years 6 16 [standard deviation]) with intracranial calcifications and/or hemorrhages diagnosed on the basis of computed tomography (CT), MR imaging (interval between examinations, 1.78 days 6 1.31), and clinical information were selected. GRE an...

PURPOSE The purpose of this work was to determine the optimal imaging parameters for minimization of metallic susceptibility artifacts during gradient echo (GRE) imaging. METHOD We performed GRE imaging of titanium screws in a nickel-doped agarose gel phantom, systematically varying several parameters to characterize and quantify susceptibility artifacts. RESULTS The greatest reduction in a...

A module for generation of referring expressions (GRE) derives descriptions that identify specified entities in context. In the implemented system I describe here for specifying simple cases of GRE by example, system-builders pair entities with descriptions of them that would be satisfactory for a system to use in context. Automatic methods then construct a suitable knowledge base and context s...

In response to environmental signals, kinases phosphorylate numerous proteins, including RNA-binding proteins such as the AU-rich element (ARE) binding proteins, and the GU-rich element (GRE) binding proteins. Posttranslational modifications of these proteins lead to a significant changes in the abundance of target mRNAs, and affect gene expression during cellular activation, proliferation, and...