background: detection of women at risk for dystocia will allow physicians to make preparations and treatment decisions that can minimize maternal and neonatal morbidity. we aimed to determine the risk factors for dystocia in nulliparous women. methods: this case series enrolled 447 nulliparous women who presented with a single pregnancy in the vertex presentation and gestational age of 38-42 we...

Accurate large-scale regional wave height prediction is important for the safety of ocean sailing. A multi-step model (ConvGRU-RMWP) based on ConvGRU designed two problems difficult spatial feature resolution and low accuracy in navigation prediction. For prediction, a multi-input multi-output strategy used, direction period are used as exogenous variables, which combined with historical data t...

Sand-moving winds blowing from a constant direction in an area of high sand availability form transverse dunes, which have a fixed profile in the direction orthogonal to the wind. Here we show, by means of a linear stability analysis, that transverse dunes are intrinsically unstable. Any along-axis perturbation on a transverse dune amplify in the course of dune migration due to the combined eff...

Detection of fault segments is an essential step for tracking main transverse faults. General observations from field studies as well as attitude measurements can give an overall understanding of the lengths of the segments, but these are not always sufficient to accurately identify and characterize them. In this study, we analyze P–T dihedra variations based on their eigenvalues to detect faul...