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만성 B 형 간염에서 인터페론과 라미뷰딘의 단독치료와 병합치료의 효과 비교
장재식(Jae Sik Jang),김성욱(Sung Wook Kim),정소연(So Yeon Jung),김남일(Nam Il Kim),이구(Goo Lee),서정일(Jeong Ill Suh),양창헌(Chang Heon Yang),이창우(Chang Woo Lee),남경수(Kyung Soo Nam),김철호(Cheorl Ho Kim) 대한내과학회 2001 대한내과학회지 Vol.60 No.4
Background: Alpha-interferon achieves HBeAg seroconversion in about 30 to 40% of patients with chronic hepatitis B, and recently discovered lamivudine, an oral nucleoside analogue, inhibits hepatitis B virus replication and reduces hepatic necroinflammation in patients with chronic hepatitis B effectively. In this study, we compared the efficacy and safety of alpha-interferon, lamivudine and their combination regimen. Methods: Fourty chronic hepatitis B patients, who were diagnosed through HBV DNA, HbeAg positivity, alanine aminotransferase elevation, and liver biopsy were enrolled in this study. Twelve patients were treated with 500 MU of alpha-interferon subcutaneously 3 times a week for 6 months, 9 patients were treated with 150 mg of lamivudine and alpha-interferon, and 19 patients were treated with 150 lamivudine daily for 6 months. Results: After treatment, all of the three groups showed rapid decline in HBV DNA level, but lamivudine group showed more clearance of HBV DNA than interferon group (alpha-interferon: 75%, combination group: 89%, lamivudine group: 100%, respectively) (p=0.04). HBeAg seroconversion rate was 25% for interferon group, 11% for combination group, 26% for lamivudine group, showing no difference between three groups (p =0.705). Mean serum ALT level and rate of ALT normalization during therapy showed no differnece (83% for interferon group, 78% for combination group, 84% for lamivudine group). Conclusion: It is suggested that the efficacy of combination interferon/lamivudine therapy appears disappointing and further study should be done for appropriate combination or monotherapy of lamivudine for patients with chronic hepatitis B.(Korean J Med 60:342- 348, 2001)
장재식(Jae Sik Chang),김은이(Eun Yi Kim),장상수(Sang Su Jang),김항준(Hang Joon Kim) 한국정보과학회 2005 한국정보과학회 학술발표논문집 Vol.32 No.1
본 논문은 손 모양 인식을 이용한 비전 기반의 보행 로봇 제어 시스템을 제안한다. 손의 모양을 인식하기 위해서 움직이는 카메라 영상으로부터 정확한 손의 경계선을 추출하고 추적하는 일이 선행 되어야 한다. 따라서 본 논문에서는 민 시프트 방법을 사용한 활성 윤곽선 모델 기반의 추적 방법을 제안한다. 제안된 시스템은 손 추출기, 손 추적기, 손 모양 인식기 그리고 로봇 제어기, 4개의 모듈로 구성 된다. 손 추출기는 영상에서 미리 정의된 손의 모양을 가지는 피부색 영역을 추출한다. 추출된 손의 추적은 활성 윤관선 모델과 민 시프트 방법을 사용하여 실행된다. 그 후 Hue moments를 사용하여 추적된 손의 모양을 인식한다. 제안된 방법을 평가하기 위해서 본 논문에서는 2족 보행 로봇 KHR-1에 제안된 방법을 적용 한다.
마이크로핀 관의 기하학적 형상변화에 대한 열전달 특성 (I) - 응축 열전달 -
곽경민,장재식,배철호,정모,Kwak, Kyung-Min,Jang, Jae-Sik,Bae, Chul-Ho,Jung, Mo 대한설비공학회 1999 설비공학 논문집 Vol.11 No.6
To examine the enhancement mechanism of condensing heat transfer through microfin tube, the condensation experiments with refrigerant HCFC 22 are performed using 4 and 6 kinds of microfin tubes with outer diameter of 9.52mm and 7.0mm, respectively. Used microfin tubes have different shape and number of fins with each other The main heat transfer enhancement mechanism is known to be the enlargement of heat transfer area and turbulence promotion. Together with these main factors, we can find other enhancement factors by the experimental data, which are the overflow of the refrigerant over the microfin and microfin arrangement. The overflow of the refrigerant over the microfin can be analyzed by the geometric shape of the microfin. Microfin tubes having a shape which can give much overflow over the microfin show large condensing heat transfer coefficients. The effect of microfin arrangement is related to the heat transfer resistance of liquid film of refrigerant. The condensing heat transfer coefficients are high for the microfin tube with even distribution of liquid film.
마이크로핀 관의 기하학적 형상면화에 대한 열전달 특성(II) -증발 열전달-
곽경민,장재식,배철호,정모,Kwak, Kyung-Min,Jang, Jae-Sik,Bae, Chul-Ho,Jung, Mo 대한설비공학회 1999 설비공학 논문집 Vol.11 No.6
The evaporating heat transfer experiments with refrigerant HCFC 22 are performed for performance evaluation using 4 and 6 kinds of microfin tubes with outer diameter of 9.52mm and 7.0mm, respectively. Used microfin tubes have different shape and number of fins with each other, The experimental results are represented with effects of quality, mass flux and EPR. The evaporating heat transfer characteristics are represented by the existence of not only heat transfer area and turbulence promotion effect but also additional other enhancement mechanism, which are the overflow of the refrigerant over the microfin and microfin arrangement. Microfin tubes having a shape which can give much overflow over the microfin show large evaporating heat transfer coefficients. The effect of refrigerant overflow is much severe in evaporation than condensation. The effect of microfin arrangement is related to overflow effect of the refrigerant over the microfin.
편평상피세포암과 동반된 소세포폐암에서 발생한 항이뇨호르몬 분비이상 증후군 ( SIADH ) 1 예
윤병구(Byung Gu Yoon),장재식(Jae Sik Jang),유석동(Seok Dong Yoo),구정태(Jung Tae Gu),이영실(Young Sil Lee),이창화(Chang Hwa Lee),천우정(Woo Jung Chun),정희철(Hee Churl Jung),강혁주(Hyeock Joo Kang),서영범(Young Beom Suh),이창우(Chang 대한내과학회 2001 대한내과학회지 Vol.61 No.5
Syndrome of inappropriate antidiuretic hormone secretion (SIADH) is the term applied to arginine vasopressin (AVP) excess associated with hyponatremia without edema in the absence of physiologic or pharmacologic stimuli to AVP secretion. SIADH is associated with various conditions such as malignant tumors, infection, central nervous system disorders, and different pharmacological agents. The patient was 73-year-old female. She was admitted to the hospit al because of persistent cough, dizziness, gener al weakness and confusion. On admission, her serum osmolality was 253 mOsm/kg, urine osmolality was 416 mOm/ kg, and urine Na concentration was 159 mEq/ L. Her Chest X- ray and CT scan of lung showed about 4×3.5 cm sized mass at posterior basal segment of left lower lobe of the lung, and CT-guided percutaneous needle aspiration revealed small round cell with clusters of malignant squamous cells. She was treated by salt restriction, hypertonic saline infusion and demeclocycline. We planned chemotherapy for advanced combined lung cancer, but she was discharged because of poor general condition and associated pneumonia without cancer chemotherapy. We report a r are case of SIADH in small cell cancer of lung combined with squamous cell cancer of lung.(Korean J Med 61:562-566, 2001)
병원역량이 경영성과에 미치는 영향에 관한 탐색적 연구 - 서비스지향성과 고객지향성의 매개효과 검증을 중심으로 -
윤종록 ( Jong-rok Yoon ),장재식 ( Jae-sik Jang ) KNU기업경영연구소 2010 기업경영리뷰 Vol.1 No.2
Medical environment of rapid change and intensified competition among medical institutions according to the hospital, the hospital management strategies to increase internal capacity and service orientation, organizational structure, which focuses on competency based management is focused on achieving results. Therefore, the relationship between Competencies and organizational performance is important to convert organizational structure with service-oriented and customer-oriented organization for service providers rather than mechanical, organic organizational structures. The company's employees and customers to meet the direct service companies, especially service representative can be called human touch in health care is emphasized. In this study, in such relationships to enhance business performance management strategy to the hospital's internal capabilities of the hospital are performed in terms of organizational service orientation, and would appear in terms of employees, property, employees and the impact on customer orientation Medical management of variables affecting the performance of what will be discussed. The results of hospitals overall business strategy, direction and challenges sought, as well as corporate policies and marketing strategies to contribute to, and even medical facilities for a rapidly changing environment, change and uncertainty about the competitive advantages the achievement is expected to appear.