A: Convolutional neural networks (CNNs) have found applications in many image processing tasks, such as feature extraction, image classification, and object recognition. It has also been shown that the inverse of CNNs, so-called deconvolutional neural networks, can be used for inverse problems such as plasma tomography. In essence, plasma tomography consists in reconstructing the 2D plasma profile on a poloidal cross-section of a fusion device, based on line-integrated measurements from multiple radiation detectors. Since the reconstruction process is computationally intensive, a deconvolutional neural network trained to produce the same results will yield a significant computational speedup, at the expense of a small error which can be assessed using different metrics. In this work, we discuss the design principles behind such networks, including the use of multiple layers, how they can be stacked, and how their dimensions can be tuned according to the number of detectors and the desired tomographic resolution for a given fusion device. We describe the application of such networks at JET and COMPASS, where at JET we use the bolometer system, and at COMPASS we use the soft X-ray diagnostic based on photodiode arrays. K : Computerized Tomography (CT) and Computed Radiography (CR); Plasma diagnostics -interferometry, spectroscopy and imaging 1Corresponding author. 2See the author list of Overview of the JET preparation for Deuterium-Tritium Operation by E. Joffrin et al. in Nucl.
Management of an anticipated difficult airway in Hurler syndrome. Hurler syndrome is a subtype of Mucopolysaccharidosis (MPS) type 1. Mucopolysaccharidosis (lysosomal storage diseases) are a group of inherited disorders caused by deficiency of specific lysosomal enzyme required for a normal degradation of glycosaminoglycons (GAGs). Administration of general anaesthesia in patients who have congenital syndromes such as Hurler's is often a challenge because of progressive airway, craniofacial and skeletal abnormalities that may make both the ventilation and intubation difficult. We encountered difficult mask ventilation and endotracheal intubation was not possible and finally ventilated with laryngeal mask airway in a known case of Hurler syndrome posted for umbilical hernia repair.
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