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김계준(Kye Jun Kim),박경란(Kyung Ran Park),이종영(Jong Young Lee),김희연(Hie Yeon Kim),성기준(Ki Joon Sung),추성실(Sung Sil Chu) 대한방사선종양학회 1992 Radiation Oncology Journal Vol.10 No.1
수술중 방사선치료를 환자에 적용하기에 앞서 본원이 보유하고 있는 LID를 이용한 전자선의선량분포 특성을 연구하였다. 이러한 선량 특성에 대한 자료는 적절한 Cone의 모향이나 크기, 에너지를 결정하게하며 빠르고 정확한 계산을 위하여 필요하다. 따라서, 본 저자들은 3-Dimensional Water Phantom Dosimetry System를 이용하여 Cone의 크기, Cone의 모양, 보상필터 사용 유무에 따라 Cone의 출력인자, 조직표면선량, 선축상 최대치 지점, 90%의 깊이, 대칭도와 편평도, SSD 보상인자, 선량분포 등을 측정하여 다음과 같은 결과를 얻었다. 1) Cone의 출력인자는 Cone 모양에 따라 각각 측정하였으며 Cone의 크기와 에너지가 작을수록 급격하게 감소하는 결과를 보였다. 2) 보상 필터의 하나인 Flattening Filter를 사용한 결과 표면 선량이 6MeV, 9MeV, 12MeV에 대하여 각각 85.3%, 89.2%, 93.4%였고, 이 보상 필터를 사용하므로 선량률과 beam의 투과율은 감소하지만 치료부위에 따라 beam의 모양을 변형시키며 특히, 표면선량을 90%나 그 이상으로 증가시킬수 있었다. 3) 3차에 걸친 beam의 collimation과 보상 필터를 결합하여 사용한 결과 매우 좋은 beam의 균일성과 편평도 뿐만아니라 90% 등선량곡선 넓이가 커지는 결과를 보였다. 4) 치료를 위하여 중요한 간격인 SSD 100cm에서 SSD 110cm까지의 출력인자는 측정치와 계산치가 Cone의 크기와 모양, 에너지에 따라 1~3%의 차이를 보였다. We have studied the dosimetric properties of electron beam using Lyon intraoperative device for intraoperative radiation therapy. The dosimetry data had compiled in such a way that a quick and correct decision regarding the cone shape, energy, and accurate calculations could be made. Using 3 dimensional water phantom, we have got the following data: cone output ratios. surface dose. dmax, d90 flatness, symmetry, beam profiles, isodose curve. and SSD correction factors, The cone output ratios were measured with straight and bevelled cone. respectively. As the cone size and the energy were reduced, the cone output ratios decreased rapidly. With the flattening filter. the surface dose increased by electron beam to 85.3%, 89.2%, and 93.4%. for 6 MeV. 9 MeV, and 12 MeV. respectively. It is important to increase the surface dose to 90% or more. Inspite of diminishing dose rate and beam penetration. this flattening filter increases the treatment volume significantly. With the combination of the three levels Collimation and the flattening filter. we achieved good homogeneity of the beam and better flatness and the diameter of the 90% isodose curve was increased. It is important to increase the area that is included in the 90% isodose level. The value of measured no calculated SSD correction factors did not agree over the clinically important range from 100 cm to 110 cm.
혈중지질에 대한 진피추출물의 유효성 평가를 위한 인체적용시험: 무작위배정, 이중맹검
이진상 ( Jin Sang Lee ),도은주 ( Eun Ju Do ),곽민아 ( Min A Kwak ),박현진 ( Hyun Jin Park ),하일도 ( Il Do Ha ),성기준 ( Ki Jun Sung ),김미려 ( Mi Ryeo Kim ) 대한본초학회 2011 大韓本草學會誌 Vol.26 No.1
Objectives:This study was performed to evaluate the efficacy of extract from Citri Pericarpium (CP) on lipid-lowering effect in semi-healthy subjects with increased serum levels of total cholesterol and triglyceride. Methods: A experimental group (n=45) and placebo group (n=46) were randomly established based on the plasma lipid profiles (triglyceride, total cholesterol etc.) in the semi-healthy subjects, then all subjects randomly took experimental or placebo capsules, which contain 1,200 mg of CP or the same dose of soluble starch per day with regular meals for 8 weeks by double-blind method. Results: One-hundred forty (140) subjects were screened, then 91 subjects enrolled in the study. No serious adverse events were reported for trial period. The CP treatment showed statistically significant decrease in serum levels of triglyceride both at 4-weeks (p<0.01) and at 8-weeks (p=0.0001). Futhermore, there was significant difference in the triglyceride levels between CP-treated and placebo group. The CP-treated but not placebo group, experienced decrease in serum levels of total cholesterol at 8-weeks. Then there was no significant difference in the total cholesterol levels between the two groups. In addition, statistically significant difference of AST, ALT, γ-GT serum levels wasn``t shown before and after trial in two groups. Conclusion: These results demonstrate that CP can significantly suppress the elevated triglyceride but not total cholesterol level. Therefore, CP may play a role in the improvement of blood lipid levels, as an effective functional food.
리졸버를 이용한 2축 김발 시스템의 공간 안정화 루프 설계에 대한 연구
강호균(Ho-Gyun Kang),성기준(Ki-Jun Seong),김성운(Sung-Un Kim),여보연(Bo-Yeoun Yeou) 대한전기학회 2007 대한전기학회 학술대회 논문집 Vol.2007 No.10
항공기, 차량, 유도탄 등과 같은 동적인 플랫폼에서 표적을 추적하기 위해서 시선을 안정화하는 외부의 추적 루프와 내부의 안정화 루프 (또는 속도 루프)가 있고, 또한 표적을 추적하기 전 표적을 지향하고 포착하기 위해 김발을 동체에 대해 일정한 각도로 유지하기 위한 위치 루프도 가지고 있다. 일반적으로 안정화 루프는 각속도를 휴정하기 위한 검출기로 자이로를 사용하고, 위치 루프는 김발각을 제어하기 위한 위치 검출기를 사용한다. 그러나 안정화 루프에 사용되는 자이로는 루프 성능을 최적으로 하기 위해서 고성능/고가의 자이로가 사용되는 단점이 있다. 따라서 본 논문에서는 위치 루프에 사용되는 위치 센서인 리졸버를 사용하여 고성능/고가의 자이로 센서 없이 안정화 루프를 설계하였고, 리졸버를 사용하여 설계된 안정화 루프가 동적인 플랫폼에 사용필 수 있는지 시뮬레이션 결과와 실험 결과를 통해 분석하였다.
비점오염관리를 위한 강우유출수 처리습지의 성능평가방법 개발
김영윤 ( Young Ryun Kim ),김상단 ( Sang Dan Kim ),이석모 ( Suk Mo Lee ),성기준 ( Ki Jun Sung ),송교욱 ( Kyo Ook Song ),손민호 ( Min Ho Son ) 한국물환경학회 2013 한국물환경학회지 Vol.29 No.3
The performance of the stormwater wetlands can be significantly influenced by antecedent stormwater in storage at the commencement of a stormevent. As inflows are intermittent and stochastic in nature, the evaluation of the treatment efficiency of a stormwater wetland should be considered by runoff capture and water treatment characteristics during interevent periods. In this study, analytical probabilistic model is applied to identity runoff capture rate and treatment efficiency of the stormwater wetland. To achieve this, continuous rainfall data recorded in Busan for 31 years has been analyzed to derive the runoff capture rate, and 1st order kinetic decay constants (kv, 1/d) are calculated from regression analysis to identify pollutants removal during interevent periods. The results show that about 60.9% of annual average runoff is captured through the stormwater wetland. The annual average treatment efficiencies of SS, BOD, COD, TN and TP is about 11.4, 8.9, 9.8, 4.3 and 9.6%, respectively. The analytical model has been compared with the numerical model and it shows that analytical model is valid. Performance evaluation methods developed in this study has the advantages of considering characteristics of rainfall-runoff, facility type and pollutant removal.
이명섭(Myeong Seob Lee),김응조(Eung Jo Kim),홍인수(In Soo Hong),성기준(Ki Jun Sung),박현주(Hyun Ju Park) 대한핵의학회 1992 핵의학 분자영상 Vol.26 No.1
N/A Miliary Tuberculosis is an illness produced by acute dissemination of tubercle bacilli via the blood stream. In chest roentgenogram, a diffuse miliary infiltrates are usually seen, but normal or suspicious ground glass pattern also can be seen in early manifestation. Ten patients of miliary tuberculosis who underwent whole-body 67Ga-citrate scintigraphy were evaluated retrospectively to study usefulness of Ga-scan for early diagnosis of miliary Tbc and evaluation of disease activity. All of ten patients demonstrated significantly diffuse bilateral pulmonary uptakes on 48 hours image. All of three patients of ground-glass pattern in chest roentgemogram also demonstrated increased uptakes. In the statistical analysis, the severity of chest roentgenographic findings showed positive correlation with the activity on Ga-scan. These results suggest that Gallium scan is useful for diagnosis of early miliary tuberculosis and for evaluation of disease activity on follow-up examination of miliary tuberculosis of lung.
Thermal Distribution in a Phantom Using 8MHz RF capacitive Type hyperthermia
이종영(Jong Young Lee),박경란(Kyung Ran Park),김계준(Kye Jun Kim),성기준(Ki Joon Sung) 대한방사선종양학회 1991 Radiation Oncology Journal Vol.9 No.2
8MHz 고주파 유전형 가열장치로 모형을 가열할 때에 전극의 크기와 모형의 두께에 따른 온도 분포를 알아보기 위하여 다양한 크기의 전극과 다양한 두께의 모형을 조합하여 실험하였다. 전극은 10, 15, 20, 25, 그리고 30cm 크기를 사용하였고 모형은 10, 15, 20, 25, 그리고 30cm 두께를 사용하였다. 모형의 두께가 25cm이상일 경우에는 전극의 크기가 모형의 두께보다 크거나 혹은 같을때에 중심부에 균일한 온도 분포를 얻을 수 있었으나, 무형의 두께가 20cm이하일 경우에는 전극의 크기가 모형의 두께와 같을 때는 균일한 온도 분포를 얻을 수 없었고 전극의 크기가 모형의 두께보다 클 때만 균일한 온도 분포를 얻을 수 있었다. 크기가 다른 한쌍의 전극을 사용하여 가열시에는 작은 전극 쪽으로 가열 부분이 집중되었고 그 현상은 전극크기의 차가 클 수록 심하였다. To evaluate the temperature distribution according to the size of the electorde and the thickness of the phantom using 8MHz radiofrequency capacitive heating device, various sized electrodoes and phantoms were used in combination. The radii of the electrodes are 10, 15, 20, 25, and 30cm and the thickness of cylindrical phantoms with diameter 30cm were 10, 15, 20, 25, 30, and 35cm. When the thickness of the phantom was 25cm or 30cm, homogenous heating was achieved by using the electrode which diameter was equal to or greater than the thickness of the phantom. When the thickness of the phantom was 20cm or less. homogenous heating was not achieved by using the electrode which diameter was equal to the thickness of the phantom, but achieved by the larger diameter of the electorode. When the sizes of paird electrodes were not equal, the smaller electrode side was preferentially heated.