Gestational trophoblastic disease is a spectrum of placental disorders ranging from benign molar pregnancies to the neoplastic conditions such as invasive mole and choriocarcinoma. These patients are identified early due to markedly elevated hCG levels and characteristic ultrasound findings. Uterine evacuation is the recommended treatment, while chemotherapy can be reserved for patients with re...

Abstract The flat plate specimens of nickel-based single-crystal superalloy with 14 film cooling holes, which made by different drilling techniques, were used to study the high-cycle fatigue (HCF) properties at 980°C in an ambient atmosphere. At same time, electrical discharge machining (EDM) a single hole also HCF under temperatures. and fracture micrographs analyzed scanning electron microsco...

As the primary choice for aero-engine turbine blades, creep resistance is an important mechanical property developing third-generation single crystal Ni-based superalloys. The behavior of superalloy in [001] orientation was studied at 980 °C under a series stress levels, accompanied with scanning electron microscope (SEM) and transmission (TEM) observation to investigate microstructure deformat...

Temporal difference learning is one of the oldest and most used techniques in reinforcement learning to estimate value functions. Many modifications and extension of the classical TD methods have been proposed. Recent examples are TDC and GTD(2) ([Sutton et al., 2009b]), the first approaches that are as fast as classical TD and have proven convergence for linear function approximation in onand ...

In this paper the TMF crack initiation behaviour of the single-crystal nickel-base superalloy MD2 is investigated and modelled. TMF tests were performed in both IP and OP for varying mechanical strain ranges in the [001] crystallographic direction until TMF crack initiation was obtained. A crystal plasticity-creep model was used in conjunction with a critical-plane approach, to evaluate the num...

Gestational trophoblastic disease (GTD) is a condition that develops from abnormal proliferation of placental trophoblasts. A rare division GTD partial mole with co-existing live fetus-a also referred to as “sad fetus syndrome” We report case 24-year-old, primigravida 26 weeks gestational age single intrauterine gestation coexisting molar pregnancy who had spontaneous preterm delivery at 27 wee...

In this study, we describe the specific features of near-field distribution a uniformly illuminated aperture. An analytical method based on physical optics in time domain is used to calculate field intensity. The primitive impulse response function makes it possible antenna. difference amplitudes fields during observation point shift along X and Y coordinate axes can reach up 13% their maximum ...

Residual stresses in TiN coatings deposited by a reactive ion process on Haynes 188 superalloy, for potential application in jet engines, were determined over the temperature range from 30–800 °C, using high temperature X-ray diffraction. In the as-coated condition the TiN films have a pronounced [111] orientation texture and a compressive room temperature stress of -10.5 GPa. After heating for...

It is well-known that the harsh operational conditions of turbine blades lead to a gradual change in the microstructure of underlying Ni-based superalloy of blades. According to this, a rejuvenation process should be conducted on turbine blades superalloys to recover their microstructures. The first and main step of rejuvenation process is the determination of appropriate solution condition in ...