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권아영(Kwon, Ah-Young),엥 리번듯(Eng Lybundith),김창혁(Kim, Changhyuk) 대한건축학회 2023 대한건축학회논문집 Vol.39 No.10
This study aims to predict how reinforced concrete beams perform under shear stress using Artificial Neural Networks (ANN) and numerical crack data. The shear crack data from reinforced concrete beam specimens through finite element analysis were obtained. Afterward, K-clustering to create an input dataset for the ANN analysis was used. The training and testing of a multi-layer perceptron regression model involved the use of samples that had been analyzed using the Finite Element Method (FEM). The evaluation of the ANN model’s performance considered the Mean Absolute Error (MAE), Adjusted R squared, Coefficient of Correlation, and Coefficient of Variation (CV).
증례 : 호흡기 ; 작은 폐 결절로 우연하게 발견된 폐의 태반양 변형 1예
김학수 ( Hak Su Kim ),이지현 ( Ji Hyun Lee ),정혜철 ( Hye Cheol Jeong ),김정현 ( Jung Hyun Kim ),박수형 ( Su Hyung Park ),권아영 ( Ah Young Kwon ),김은경 ( Eun Kyung Kim ) 대한내과학회 2016 대한내과학회지 Vol.90 No.2
Pulmonary placental transmogrification (PT) is a rare lung disease that takes on the histologic appearance of placental chorionic villi. We herein report a case of PT in a 66-year-old woman who presented with a single nodule on chest radiography performed during a routine health examination. She had no complaints of any symptoms. Chest radiography showed a focal ill-defined nodular opacity in the right lower lobe; chest computed tomography revealed a 17-mm lobulated, focal irregular mass with fissural retraction in the right lower lobe, suggestive of lung cancer. Pathology of a percutaneous needle aspiration biopsy revealed papillary structures resembling placental villi. These were lined by cytotrophoblast-like cells and syncytiotrophoblasts. This characteristic pathologic finding led to a diagnosis of PT. PT of the lung is found mainly in bullous or cystic lesions. However, this patient presented with a single nodule on chest radiography. (Korean J Med 2016;90:144-147)