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김창욱,조성원,이충웅,Kim, Chang-Wook,Cho, Seong-Won,Lee, Choong-Woong 대한전자공학회 1994 전자공학회논문지-B Vol.b31 No.11
This paper deals with fast competitive learning using classified learning rates. The basic idea of the proposed method is to assign a classified learning rate to each weight vector. The weight vector associated with an output node is updated using its own learning rate. Each learning rate is changed only when its corresponding output node wins the competition, and the learning rates of the losing nodes are not changed. The experimental results obtained with image vector quantization show that the proposed method learns more rapidly and yields better quality that conventional competitive learning. 본 논문은 분류된 학습률을 이용한 고속 경쟁 학습에 대한 연구이다. 이연구의 기본 개념은 각 출력 노우드의 연결강도 벡터에 분류된 학습률을 할당하는 것이다. 출력 노우드의 각 연결강도 벡터는 자기 자신의 학습률에 의하여 갱신된다. 각 학습률은 관련되는 출력 노우드가 경쟁에서 승리할 때에만 변화되며, 승리하지 못한 노우드들의 학습률은 변화되지 않는다. 영상 벡터 양자화에 대하여 실험한 결과는 제안한 방법이 기존 경쟁 학습 방법에 비하여 더 빠르게 학습되고 더 좋은 화질을 갖게 됨을 보였다.
김창욱,신문석,김병천,이규석,송준영 ( Chang Wook Kim,Moon Seok Shin,Byung Chun Kim,Kyu Suk Lee,Jun Young Song ) 대한피부과학회 1997 대한피부과학회지 Vol.35 No.6
Epidermodysplasia verruciformis(EV) is a rare, sometimes familial disorder characterized by chronic infection with EV-specific HPV types. It manifests itself as numerous flat warts, red and brownish macules, and pityrias:s versicolor-like lesions. Immunodeficient staies such as AIDS renal transplantation, Hodgkins dis ase, and systemic lupus erythematosus, have been associated with EV. We report a case of a 42-year old female with EV, with lesions on the chest, shoulders, and back, For about the past 2, years, she had been treated with prednisolone for systemic lupus erythematosus. Histopathological findings revealed loose basket-weave-like hyperkeratosis and there were clear large cells arranged in nests in the granular and spinous layers. Their nuclei were shrunken and pyknotic, and the clear cytoplasm was dotted with dispersed keratohyaline granules of different sizes anr shapes. Electron microscopic findings showed aggregates of many viral particles in the nuclei of displastic epidermal keratinocytes. Pan papilloma virus monoclonal Antibody positive nuclei were;hown by immunoperoxidase staining. She has been treated with CO, laser and Tretinoin(0.1% ) oin ment. The patient is being monitored for any signs of recurrence for a period of 5months (Korean J Dermatol 1997;35(6): 1203-1207)
김창욱(Chang-wook Kim) 한국자료분석학회 2020 Journal of the Korean Data Analysis Society Vol.22 No.5
골프 스윙 시 잘못된 라이로 임팩트하게 되면 볼의 구질을 포함한 골프 샷 데이터에 영향을 미치는지 알아보고 올바른 라이에 대한 중요성을 인식시키는데 그 목적이 있으며, 임팩트 시 라이보드에서 어떤 라이형태를 가지고 있는지 확인하고 트랙맨을 통해 샷 분석을 실시하였다. 정확한 라이를 측정하기 위해 클럽 솔(sole)에 라이 마킹 테이프를 붙이고 클럽페이스에도 임팩트마킹테이프를 부착하였다. 라이는 토우가 들리는 경우, 힐이 들리는 경우, 올바른 라이의 경우, 3가지의 라이형태에 따른 샷 데이터를 측정하였다. 아마추어 골퍼의 라이변화에 따른 샷 변화에 대한 연구의 결과는 라이의 변화에 따라 어택앵글, 클럽패스, 볼의 비행방향, 스매시 펙터에서 유의한 차이가 있는 것으로 나타났다. 정확하지 못한 라이는 볼의 비행방향과 볼의 구질 변화에 많은 영향을 미치는 것으로 나타났지만 올바른 라이를 가졌더라도 자신의 스윙에 맞게 설정되지 않는다면 올바른 샷을 만들 수 없음을 알 수 있었다. 본 연구에서의 결론은 아마추어의 잘못된 구질은 라이의 영향보다는 다른 스윙에 대한 원인이 더 많이 영향을 미치는 것으로 나타났다. It aims to find out influence on golf shot data including ball quality when impact is made with wrong lie and to have awareness on the importance of correct lie. To measure precise lie, lie marking tape is put on club sole, and impact marking tape is also put on the club face. According to 3 lie forms cases of T(toe touched), H(heel touch) and C(center touch), shot data were measured. Study result on shot change by lie change of amateur golfer showed significant differences in attack angle, club path, ball flying direction and smash factor according to the change of lie. An inaccurate lie has a great influence on the direction of flight of the ball and changes in the pitch of the ball. However, even if you have the right lie, you can see that you cannot make the right shot if it doesn t fit your swing.
만성 B형간염의 항바이러스 치료에서 구제요법으로서 테노포비어 단독치료의 가능성
김창욱 ( Chang Wook Kim ) 대한소화기학회 2015 대한소화기학회지 Vol.65 No.1
Efficacy of Tenofovir-based Rescue Therapy for Patients with Drug-resistant Chronic Hepatitis B (Korean J Gastroenterol
김창욱 ( Chang Wook Kim ) 대한내과학회 2008 대한내과학회지 Vol.75 No.1
Hepatic encephalopathy, one of the major complications of cirrhosis, is a neuropsychiatric syndrome caused by accumulation of toxins in the central nervous system following dysfunction in liver detoxification. Various manifestations makes it difficulty to diagnose and categorize hepatic encephalopathy. For the consistency in diagnosis and staging of hepatic encephalopathy, standardized nomenclature regarding forms of hepatic encephalopathy was proposed recently. Due to the poor understanding of pathophysiology, effective prevention or treatment options are limited. Based on the theory that intestinal-derived ammonia plays major role in the development of hepatic encephalopathy, therapeutic approaches are directed at reducing intestinal bacterial production of ammonia and facilitating its elimination. Non-absorbable disaccharides, antibiotics such as rifaximin and L-ornithine-L-aspartate are main therapies for hepatic encephalopathy. Alternative therapies such as benzodiazepine receptor antagonists, branched-chain amino acids, sodium benzoate and acarbose have limited data supporting their use. Precipitating factors must be looked into carefully and corrected immediately because most patients are usually present with precipitating factors. Hepatic encephalopathy without precipitating factors shows poor prognosis and could be candidate of liver transplantation. (Korean J Med 75:27-36, 2008)