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Clustering Wear Particle Using Computer Vision and Self-Organizing Maps
Marcos Alessandro C. Ramos,Bruno Cesar C. Leme,Luis Fernando de Almeida,Francisco Carlos P. Bizarria,Walter P. Bizarria 제어로봇시스템학회 2017 제어로봇시스템학회 국제학술대회 논문집 Vol.2017 No.10
This work presents the implementation of a method for classification of wear particle contaminant present in industrial oil by using image processing and neural networks. It is based on morphological data obtained from a computer vision system and employs Self-Organizing Maps to classify particles’ features intro different wear debris groups. The dataset used for training the neural network and further validation of the results was gathered using reports provided by a specialist company in wear particle analysis. The objective is to develop a system feasible for most industries to turn the process of particle classification more autonomous and faster. The results demonstrate that our proposed system could classify particles considering their shape in a reliable and autonomous way.
Marcello Picchio,Annalisa Romina Di Filippo,Martina Spaziani,Simone Orelli,Riccardo Bellagamba,Giuliano Guttoriello,Alessandro De Cesare,Erasmo Spaziani 대한갑상선-내분비외과학회 2021 The Koreran journal of Endocrine Surgery Vol.21 No.3
Purpose: The study aims to determine whether postoperative infusion of betamethasone reduces the risk of symptomatic hypocalcaemia (SHC) and other complications after total thyroidectomy. Methods: We compared a group of patients receiving betamethasone (beta group) postoperatively to a group without any perioperative glucocorticoid infusion (no beta group). Plasma levels of parathyroid hormone, total calcium, and C-reactive protein (CRP) were measured pre- and postoperatively. Complications were recorded within a 30-day follow-up. Postoperative SHC was the primary outcome. Results: In the beta group and the no beta group, 54 patients and 47 patients were included, respectively. In the beta group, the incidence of SHC (4 pts vs. 14 pts in the no beta group; P=0.003) was reduced. In the beta group, serum calcium levels were higher on postoperative day 1 (8.6 mg/dL vs. 8.2 mg/dL in the no beta group; P=0.001) and day 2 (8.7 mg/dL vs. 8.1 mg/dL in the no beta group; P<0.000). In the beta group, serum C-reactive protein levels were lower postoperatively. In a univariate analysis, American Society of Anaesthesiology score > I (odds ratio [OR], 0.19; P=0.002), no betamethasone treatment (OR, 0.19; P=0.006), and parathyroid glands remaining in situ (PGRIS) score <3 (OR, 6.00; P=0.005) were related to postoperative SHC; in a multivariate analysis, betamethasone treatment (OR, 0.09; P=0.007) and PGRIS score <3 (OR, 8.41; P=0.045) were related to postoperative SHC. No difference was observed in postoperative complications. Conclusion: Postoperative use of betamethasone reduces the incidence of SHC after thyroid surgery without affecting other complications.