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스크린도어용 다이렉트 드라이브 모터 성능개선을 위한 자기식 센서의 고조파 저감 연구
김연수(Yun-Soo Kim),이주(Ju Lee) 대한전기학회 2015 전기학회논문지 Vol.64 No.11
This paper presents the 3-dimensional electromagnetic field analysis method and correction of sensor distortion that is used by a motor speed sensor. The magnetic sensors are being expanded due to lower price than the other speed sensors such as resolver and encoder. Magnetic sensor generates sine and cosine waves when the motor rotates. However, the sine and cosine signals are distorted due to magnetic noise, which makes the angle error of the sensor, generated near by the Hall element. This paper defines an optimal design variables by using the Taguchi method to minimize output distortion of the magnetic sensor and permanent magnet. To enhance reliability of the magnetic position sensor from sensitivity error, assembly amplitude mismatch and the electrical angle, 3-Dimensional electromagnetic finite element method and correction algorithm errors were performed in due of the magnetic sensor in order to improve the quality of the initial production model.
간암 환자에서 혈청 CA19 - 9 측정의 임상적 의의
김연수(Yun Soo Kim),심재정,서동진(Dong Jin Suh) 대한내과학회 1989 대한내과학회지 Vol.37 No.5
N/A To evaluate the clinical significance of CA19-9 in patients with metastasis in the liver, the serum CA19-9 level was determined in 25patients with primary liver cancer, 24 with metastatic liver cancer and 17 with benign gastrointestinal diseases. The results were as follows: 1) Serum CA19-9 was elevated in 169. of primary liver cancer and 71% of metastatic liver cancer. 2) The serum level of CA19-9 in metastatic liver cancer was significantly higher than that in primary liver cancer. 3) In primary liver cancer, elevation of serum CA19-9 was noted in 2 of 10cases with high serum AFP (500ng/ ml), and in 2 of 11 cases with low serum AFP (100ng/ml). 4) In metastatic liver cancer, elevation of serum CA19 -9 was noted not only in 12 of 13cases with high CEA, but also in 5 of II with normal CEA levels. It is suggested that CA19-9 is a more sensitive tumor marker than CEA in metastatic liver cancer, and can be a useul screening test to differentiate primary and metastatic liver cancer.
반복적으로 혈청 α - Fetoprotein 의 심한 상승을 보인 간경변증환자
김연수(Yun Soo Kim),강숙경(Sook Kyung Kang),서동진(Dong Jin Suh) 대한소화기학회 1988 대한소화기학회지 Vol.20 No.2
The serum concentration of AFP can be rnildly elevated in non-neoplastic liver disease, and it reflects the regeneration after hepatocellular necrosis. The authors report a 48 year old male with HBeAg-positive liver cirrhosis who showed markd elevation of serum AFP recurrently. During 2 years follow-up, recurrent elevation of AFP occurred 3 times with coincident exacerbation of serum ALT and reappearance of HBeAg. AFP was elevated to 3113, 1370 and 104 ng/ml respectively. No evidence of tumor was found by ultrasonography, CT scan and celiac angiography, and biopsy of the liver revealed micronodular cirrhosis.
김연수(Yun Soo Kim),서동진(Dong Jin Suh) 대한소화기학회 1994 대한소화기학회지 Vol.26 No.6
N/A Hepatocyte growth factor(HGF) is the single most potent in vitro mitogen for hepatocytes yet described. Increased levels of HGF in the rat following partial hepatectomy or carbon tet- rachloride induced liver damage strongly suggest that it plays a key role in liver regeneration. Serum levels of human hepatocyte growth factor(hHGF) were reported to be markedly in- creased in patients with fulminant hepatic failure(FHF) in relation to grade of hepatic coma, and also slightly increased in acute and chronic liver diseases. In this study, we intended to identify the difference of serum hHGF levels in various liver diseases and their changes during the clinical courses. Serum hHGF levels was measured by enzyme linked immunosorbent assay in 14 patients with FHF, 23 with acute viral hepatitis (AVH), 18 with chronic active hepatitis(CAH), 19 with liver cirrhosis(LC) and 32 with hepat,ocellular carcinoma(HCC). The mean value of serum hHGF was highest in cases with FHF, which was 5.6+3.8(S.D.) ng/ml. The hHGF level greater than 1.0 ng/ml was found in 100% of FHF, 9% of AVH, 6% of CAH, 21% of LC and 13% of HCC. Although statistically not significant, serum hHGF had direct correlation with billirubin levels. Among 5 patients with FHF whose serum hHGF levels were serially checked, progressive increase of hHGF was observed in 3 patients who died. On the contrary, serum hHGF progressively decreased in the survivors. There was no significant change of hHGF between active and convalescent state in AVH and CAH. Serum hHGF levels were elevated slightly after transarterial chemoemboli- zation in patients with HCC. It it suggested that highest elevation of hHGF is characteristic of FHF and serial measurement of hHGF level can be useful to predict the outcome of FHF. (Korean J Gastroenterol 1994; 26: 931-936)
김연수(Yun Soo Kim),서동진(Dong Jin Suh) 대한소화기학회 1993 대한소화기학회지 Vol.25 No.5
N/A Although interferon-a (IFK-a) has been used for the treatment of chronic hepatitis C, its effectiveness is often limited Ribavirin, a nucleoside analog agent with a broad spectrum of antiviral activity, has been reported to decrease serum ALT levels in chronic hepatitis C patients. Ribavirin (600 mg/day) was given to 34 patients with type C chronic liver diseases (20 chronihepatitis, 14 cirrhosis) for 3 months (19 patients) and 6 rnonths (15 patients), respectively. The efficacy was evaluated by measuring serum alanine aminotransferase (ALT) levels. Serum ALT levels gradually decreased in both groups after administration cf ribavirin, but statistical significance could not be observed. After treatment, decrease of serum ALT more than 50% of pretreatment level was found in 32% in 3 months group and in 20% in 6 months group. 3 to 6 rnonths after cessation of ribavirin therapy, sustained normal ALT was observed in 15% among 26 patients. No significant side effect was found during ribavirin therapy. It is suggested that although ribavirin decreases serurn ALT levels in chronic HCV-related liver disease, it is not effective in controlling disease activity as a single agent.
Legal Review of Unfair Competition Issues in the Recent Video Game Litigations
김연수(Yun Soo KIM) 한국컴퓨터게임학회 2021 한국컴퓨터게임학회논문지 Vol.34 No.2
과거 2015년 이전 게임소송 분쟁들은 게임물을 보호하기 위하여 지식재산권의 보호를 모색하는데 주로 쟁점이 있었다. 게임 내 이미지, 캐릭터 등과 같이 게임 속 창작물은 저작권법에 의한 보호를 받을 수도 있다. 게임 내 로고, 심볼 혹은 표장은 상표권에 의한 보호를 받을 수도 있다. 그러나 게임의 명칭, 게임 규칙, 아이템 기능 등과 같은 그 외의 게임요소들은 단독으로는 저작권이나 상표권 보호를 받기가 어려웠다. 최근, 게임 지적재산권 및 게임 사업 운영 관련 소송 과정에서 부정경쟁방지법 위반의 쟁점이 함께 제기되는 경우가 발생하고 있다. 본고는 가장 최근인 2019년부터 2021년 5월까지 선고된 한국, 미국, 일본 게임 판례 중 부정경쟁방지법 쟁점을 다룬 사례들을 살펴본다. 최근 사례에 등장한 부정경쟁행위 유형은 크게 타인의 성과물을 무단 사용하고 경제적 이익을 해하는 일, 타인의 상품 혹은 그와 유사한 것의 표시를 자신의 영업에 사용하는 것이다. 관련 분쟁이 독점거래 규제법 위반으로 확장되는 경우도 있다. 부정경쟁방지법에 의한 보호는 전통적인 지식재산법에 의하여 보호하기 어려운 영역도 포섭이 가능하다. 그러나 보호범위가 확장될수록, 이는 한편으로 게임 개발자들이 새로운 게임을 제작할 경우에 타 게임의 창작물 혹은 게임 회사의 성과물을 침해할 수 있는 위험이 증가함을 의미하기 때문에 주의할 필요가 있다. Previously, the parties of the old video game litigations that alleged before 2015 in Korea seem to focus on seeking intellectual property rights to protect the works of games. Some creations in the game (i.e. images, game characters, etc.) might be protected by copyright law. The logo, symbol, or trademark of the game would be entitled to the Trademark rights. But the other features of the game, such as the title, game rule, and item functions, etc., were hard to be protected under neither laws above. Recently, violation of unfair competition is alleged with the other infringement claims in the lawsuits related to the game IP and businesses. This paper explores the very recent video game cases published between 2019 to May 2021 from the Courts of South Korea, the USA, and Japan. The types of violation of unfair competition prevention laws in such cases could be categorized as the defendant s activity of using achievements of other persons without their permission and harming their economic benefit or using the indication of other goods of it for one s own business. And sometimes, the case could become more serious turning into antitrust litigation. Protection under Unfair Competition Prevention Act could variously cover the issues that traditional IP laws cannot cover. But as the protection gets broader, the concern of game developers not to infringe other game s creation or game company s achievements also gets bigger when establishing a new game or a business.