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구명완(Myoung Wan Koo),이우원(Woo Won Lee),임계영(Kye Young Lim) 전력전자학회 2008 전력전자학술대회 논문집 Vol.- No.-
The Former High Efficiency Inverter(the power restoration process) system process has advantage which is the energy reduction rather than the Former Inverter(the resistence damping process), However, under repair and remodeling, the power facilities capacity is not easy to increase that the former High Efficiency Inverter needs to increase the Power Facilities Capacity of 20~30% than the Inverter(the resistence damping process) so Therefore we are going to suggest the system which is not going to make an increase the power facilities capacity and is applicable the High Efficiency Inverter.
구명완(Myoung Wan Koo) 한국어학회 2001 한국어학 Vol.13 No.-
In this paper, we present the definition of speech recognition technology and its application services currently working over telephone network. And some research issues especially related to Korean are also shown among basic problems of speech recognition technology. The current statue of the speech recognition technology which will eventually change our future life style is still in the early stage. We show three kinds of services developed by Korea Telecom such as voice dialing, railroad information and name dialing services. And we also describe some research issues obtained throughout our services.
구명완,Koo, Myoung-Wan 한국음향학회 2021 韓國音響學會誌 Vol.40 No.5
We propose a speech recognition system based on conformer. Conformer is known to be convolution-augmented transformer, which combines transfer model for capturing global information with Convolution Neural Network (CNN) for exploiting local feature effectively. The baseline system is developed to be a transfer-based speech recognition using Long Short-Term Memory (LSTM)-based language model. The proposed system is a system which uses conformer instead of transformer with transformer-based language model. When Electronics and Telecommunications Research Institute (ETRI) speech corpus in AI-Hub is used for our evaluation, the proposed system yields 5.7 % of Character Error Rate (CER) while the baseline system results in 11.8 % of CER. Even though speech corpus is extended into other domain of AI-hub such as NHNdiguest speech corpus, the proposed system makes a robust performance for two domains. Throughout those experiments, we can prove a validation of the proposed system.
김완섭,이혜경,이문성,심찬섭,김영민,조영덕,김재한,송상훈,오명진,황헌규,문철,문종호,서기현,허경렬,구동억 대한소화기내시경학회 1999 Clinical Endoscopy Vol.19 No.6
Cavernous transformation of the portal vein is a rare condition probably arising secondary to extrahepatic portal vein thrombosis or obstruction with recannalization and/or collateral veins formation to bypass the obstruction. It is believed that cavernous transformation of the portal vein is caused by a variety of diseases associated with periportal collateral development and hepatopedal flow. It is known that portal vein occlusion, which is the actual cause of cavernous transformation, has a wide variety of etiologies, such as congenital abnormalities, omphalitis, pancreatitis, various carcinoma, and liver cirrhosis. In most cases, the revealing symptom is upper gastrointestinal bleeding. Rarely, however, diagnosis is made from obstructive jaundice. Extensive collateral veins due to portal vein occlusion may compress and narrow the biliary tract. A 39-year-old man was admitted due to jaundice and abdominal discomfort for 1 month. He was confirmed to have obstructive jaundice due to collateral vessels of cavernous transformation of the portal vein. We report a case of obstructive jaundice caused by cavernous transformation of the portal vein.