Flangeless Esser PET Phantom 영상 자동 분석 프로그램의 유용성 평가

남궁창경,남기표,김경식,김정선,임기천,신상기,조시만,동경래,NamGung, Chang-Kyeong,Nam, Ki-Pyo,Kim, Kyeong-Sik,Kim, Jeong-Seon,Lim, Ki-Cheon,Shin, Sang-Ki,Cho, Shee-Man,Dong, Kyung-Rae 대한핵의학기술학회 2009 핵의학 기술 Vol.13 No.1

Purpose: ACR (American College of Radiology) offers variable parameters to PET/CT quality control by using ACR Phantom. ACR Phantom was made to evaluate parameters which are uniformity, attenuation, scatter, contrast and resolution. Manual analysis method wasn't good for the use of QC because values of parameter were changed as it may user and it takes long time to analysis. Ki-Chun Lim, a nuclear scientist in AMC, developed program that automatically analysis values of parameter by using ACR Phantom to overcome above problems. In this study, we evaluated automatic analysis program's usability, through the comparing SUV of each method, reproducibility of SUV when repeated analysis and the time required. Materials and Methods: Using Flangeless Esser PET Phantom, the ideal ratio of 4 : 1 hot cylinder and BKG but it actually showed a ratio of 3.89 to 1 hot cylinder and BKG. SIEMENS Biograph True Point 40 was used in this study. We obtained images using ACR phantom at Fusion WB PET Scan condition (2 min/bed) and 120 kV, 100 mAs CT condition. Using True X method, 3 iterations, 14 subsets, Gaussian filter, FWHM 4 mm and Zoom Factor 1.0, $168{\times}168$ image size. We obtained Max. & Min. SUV and SUV Mean values at Cylinder (8, 12, 16, 25 mm, Air, Bone, Water, BKG) by automatic program and obtained SUV by manual method. After that, we compared manual and automatic method. we estimate the time required from opened the image data to final work sheet was completed. Results: Automatic program always showed same result and same the time required. At 8, 12, 16 and 25 m cylinder, manual method showed 6.69, 3.46, 2.59, 1.24 CV values. The larger cylinder size became, the smaller CV became. In manual method, bone, air, water's CV were over 9.9 except BKG (2.32). Obtained CV of Mean SUV showed BKG was low (0.85) and bone was high (7.52). The time required was 45 second, 882 second respectably. Conclusions: As a result of difference automatic method and manual method, automatic method showed always same result, manual method showed that the smaller hot cylinders became, the lager CV became. Hot cylinders mean region size, the smaller hot cylinder size becomes we had some trouble in doing ROI poison setting. And it means increase in variation of SUV. The Study showed the time required of automatic method was shorten then manual method.

월슨씨병에서 나타난 안검개방실행증 1예

박기종,권오영,최낙천,김남곤,김태유,임병훈 대한신경과학회 1997 대한신경과학회지 Vol.15 No.5

Jogging 및 Rope Skipping 운동이 여고생의 심폐 지구력에 미치는 영향

李基天 인하대학교 스포츠과학연구소 2000 論文集 Vol.12 No.-

This paper attempted to compare and analyze two groups-a comparison group and an experimental group, which are considered to improve the cardio-respiratory and aerobic exercise through the jogging and the rope-shipping. It also tried to find out how often and differently such exercises can affect the circulatory-respiratory abilities at the beginning or the finishing stage of a eight-week exercising period. For its convenience, twenty-four students from H Girls' High School were chosen. They were divided into two groups such as an experimental and a comparison group.(experimental group: eight students for jogging, and rope-skipping respectively. Comparison group : eight students). Using 'Tread Mill', the result was analyzed and some conclusions were made as follows ; 1.As for the variations concerning the aerobic cardio-respiratory, three groups showed expected difference(5%) as shown in table 4 statistically, when the average of pulse rate, maximum pulse rate, normal quantity of intaken oxygen and, maximum quantity of intaken oxygen, maximum carbon dioxide, and the hour of labor were sampled and analyzed, while the three groups showed little difference in the quantity of the breath ventilation, the quantity of the carbon dioxide, when they were relaxed. 2.As for the non-aerobic reverse value, the three groups showed the expected difference as shown in the table 5. But they showed no oxygen and the absolute value of breath-ventilation. 3.As for the pulse change at the time of restoration, there was a five-percent difference as shown in table 6, when the result of the estimate were sampled and analyzed directly after two minutes' exercise in jogging group-comparison group and rope-skipping group, comparison group, while there was little difference between the tow experimental groups, such as the jogging groups and rope-skipping groups. 4.As for the change of the lactic acid density concerning jogging and, rope-skipping, in comparison group, there appeared to be five percent difference as shown in table 7, when the average pulse rates among the three groups were estimated, whereas there was little difference between the jogging group and rope-skipping group directly before or after the given exercise.

Ti:Sr0.6Ba0.4Nb2O6 결정의 성장과 광학 특성

이수천, 임기수, 이재봉 忠北大學校部設基礎科學硏究所 1999 自然科學硏究 Vol.13 No.-

-본문참고-

경피적 겸자 정복 및 골수강내 금속핀 고정을 이용한 쇄골 골절의 치료

홍기도,하성식,정남식,심재천,김경호 대한골절학회 2004 대한골절학회지 Vol.17 No.4

목적 : 경피적 겸자 정복 및 골수강내 금속판 고정술을 이용한 쇄골 간부 골절의 치료에 대해 유용성을 규명해 보고자 하였다. 대상 및 방법 : 2002년 1월부터 2003년 7월까지 본원에서 쇄골 간부 골절 환자 중 신경 및 혈관 손상이 없었고, 골절의 분쇄상이 비교적 적었던 총 16례를 대상으로 겸자를 이용한 경피적 정복 후에 골수강에 금속판을 삽입하여 고정하였다. 술 후 유합 정도 및 결과를 임상적, 방사선학적으로 분석하였다. 결과 : 방사선학적으로 골유합을 보인 경우가 총 15례였으며, 술 후 평균 9.1주에 유합 소견을 관찰하였다, 임상적으로 강 등의 기준에 따라 구분한 결과, 우수 이상이 14례로 나타났다. 1례에서 1주 만에 K-강선의 내측전위로 골절부위가 재전위되어 관혈적 정복 및 금속판 내 고정을 시행한 이외에 다른 주요 합병증은 없었다. 결론 : 저자들의 방법은 수술시간이 짧고 간단하며, 연부조직의 추가적 손상이 적어 골유합율이 높고, 수술 반흔을 남기지 않아 수술적 적응을 신중히 고려한다면 쇄골 간부 골절의 치료법의 하나로 유용할 것으로 사료된다. Purpose: To investigate the utility of surgical treatment of clavicle shan fracture using a percutaneous towel clip reduction and intramedullary fixation. Materials and Methods : This study was conducted for total 16 case of patients who had no neurovascular injury and a few comminuted bone fragment among patients with clavicle shaft fracture from January 2002 to July 2003. The method of operation was percutaneous towel clip reduction and intramedullary fixation. The clinical and radiological results were evaluated. Results : Radiologically, 15 cases showed bone unions and the avenge time was 9.1 weeks. According to Kang's criteria clinically, there were 14 cases which were more than an excellence. One case substituted open reduction and nailing fixation due to a medial migration of K-wire and re-displacement of fracture even in 1 week. However, there wasn't any other major complication. Conclusion : Due to its having no additional injury to soft tissues, no scar formations, and its short operation time, percutaneous towel clip reduction and intramedullary fixation will be very useful as one of the treatments of clavicular shaft fracture if it follows correct surgical indications.

16 Bit Microprocessor를 이용한 유도전동기의 최적제어에 관한 연구

徐基永,金兌孝,權純杰,申千雨 慶南大學校 附設 工業技術硏究所 1989 硏究論文集 Vol.7 No.-

本 論文은 16 bit one-chip 마이크로프로세서를 이용하여 正弦波 變調 最適 PWM 制御方式을 채택한 인버어터에 관한 연구이다. 3相 誘導電動機의 可變速 運轉에서 스위칭시에 발생되는 損失의 증가 및 效率 저하의 원인이 되는 高周波成分과 이를 除去하기 위한 알고리즘을 해석하고,이 알고리즘을 실현하기 위해 制御用 16 bit one-chip 마이크로프로세서로 구성되는 hardware시스템을 設計함으로써 종래의 마이크로프로세서로 실현 불가능했던 on-line 계산 및 real-time 실현을 가능하게 하였다.이 시스템을 最適으로 制御하고 計算하기 위한 software를 개발하고,아울러 외부 시스템과 RS-232C로 통신할 수 있는 기능을 첨부하여 host computer에서 remote control이 가능하게 함으로써 MAP(manufacture automation protocol)에 대처할 수 있게 하였다. hardware 및 software의 設計에 따라 제작된 시스템의 高주波 制御效果를 확인하기 위한 實驗에서 現在 産業界에서 사용되고 있는 우수한 성능을 가진 것으로 알려진 特定모델을 선정하여 이와 比較 檢討하였다. 그 結果 인버어터의 基本波成分과 각 高調波成分의 스펙트럼이 出力周波數에 따라 다소의 차이가 있었으나, 測定 周波數의 전체범위에서 比較된 특정모델보다 우수한 特性을 얻을 수 있었다. This paper describes an inverter adopting an optimal sinusoidal waveform modulation PWM control method using 16 bit one-chip microprocessor. In variable speed operation of three-phase induction motor, a large number of harmonic components are included in switching waveform and cause decrement of efficiency. We analyzed some properties of each harmonic component and an algorithm for elimination of harmonics. In order to implement the algorithm, we designed a hardware system composed of special purpose 16 bit one-chip microprocessor. But it has been impossible to get a real-time computation. We compared and examined the effect of harmonics between the designed inverter and the commercial inverter. It was found that the designed inverter had more excellent suppression of harmonics than the selected commercial inverter over a range of all measured frequencies.

회수수 안정화제를 사용한 콘크리트의 공학적 특성에 관한 연구

김기정,金光華,이문환,이세현,한천구 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2

In this study is investigated the engineering properties of concrete using stabilizing agent of recycling water in order to suggest a practical use of recycling water. According to the results. as stabilizing agent is added. fluidity and air content varies slightly with W/C, but does not make a big difference. Bleeding is reduced by adding stabilizing agent, and so it decreases by about 40% at the adding ratio of 0.15%. When stabilizing agent is not added, compressive strength decreases in comparison with plain concrete, but increases by adding stabilizing agent, so it is largest at adding ratio of 0.30%(W/C 30%) and 0.15%(W/C 40, 50%). Length change by drying shrinkage is larger than plain concrete in the case of no adding of stabilizing agent, but decreases by the use of stabilizing agent. Therefore, it is thought that when stabilizing agent is added to recycling water, quality deterioration of concrete is prevented, moreover, quality of concrete can be improved.

태풍 Vera 통과시 남해에서의 파랑추정

전기천,강시환,박광순,김상익 경남대학교 환경문제연구소 1990 환경연구 Vol.12 No.-

최근 한반도를 통과했던 태풍 중 그 규모가 커서 海上에서 발생된 颱風波浪에 의해 특히 남해안 지역에 큰 재해를 준 1986년 태풍 Vera(8613)호 통과시에 南海의 거문도와 거제도 海上에서 동시에 태풍파랑을 관측하였다. 관측된 태풍파랑의 재현을 위하여 유럽의 북해를 대상으로 최근 연구개발된 Hybrid Parametric Wave Model(HYPA)을 적용하여 Vera 통과시의 파랑분포를 수치적으로 계산하였으며, 그 계산결과를 관측치와 비교하였다. 또한 태풍파랑의 추정에 주로 사용되어온 Wilson모델의 결과와도 비교하여으며, HYPA모델의 결과가 Wilson모델에 비해 훨씬 관측된 파랑자료에 근접함을 보였다. 따라서 본 연구를 통해서 한반도 근해상에서 발생되는 태풍파랑의 예측과 추정에 있어 HYPA모델에 매우 정확함을 보여주었다. During the passage of Typhoon Vera(8613) which causes the heavy natural disasters, especially, on the southern coast of Korea, waves were simultaneously measured at two different locations of the South Sea, that is, near to the Geomun and the Geoje Islands. In order to reproduce the measured typhoen-waves, Hybrid Parameteric Wave Model(HYPA) which has been developed for the North Sea was adopted to calculate numerically the waves generated by the Typhoon Vera. The model results were jilter-compared with the measured waves, and also with the results of Wilson model which has been widely used for the hindcast of typhoon-waves. HYPA's results show in the closer ageement with the measured waves than those of Wilson's. Based on these comparisons, HYPA model can be used for more accurate forecast and hindcast of typhoon-waves in Korean Seas.

다목적 계획법을 활용한 김해와 부산지역 절화생산 농가의 영업계획 수립에 관한 연구

채수천,차재호,손기철 건국대학교 생명과학연구원 1994 생명과학지 Vol.1 No.-

본 연구는 절화 생산농가의 경영실태를 파악하고 경영진단을 위한 제 지표를 작성하고 주어진 가용 자원조건하에서 농가 gross margin의 극대화와 농번기 고용노동의 극소화를 동시에 얻을 수 있는 영농 계획수립 대안을 제시해 보고자 다목적 계획법(Multiobjective Programming)분석을 시도하였다. 본 연구의 기초가 되는 자료의 조사는 부산, 김해지역의 18개 절화 전업농가를 대상으로 하였으며, 그 결과를 요약하면 다음과 같다. 1) 조사농가의 호당 평균 경지면적은 1,550평이었으며 그중 75.7%는 임대경지로서 매우 영세하였고 호당 자가 노동력은 2.4인이였으며 고용 노동력은 1.7인이었다. 2) 재배현황은 Carmation, 장미, 안개초, Gerbera, 국화, Gladiolus, Iris, 금어초, Freesia 등의 9작목에 21개의 작부형태였다. 3) 작목별 노동 투하시간은 장미가 1,578시간으로 가장 많았으며, 글라디올러스 Ⅲ가 296시간으로 가장 적었다. 이익계수는 장미가 7,748천원으로 가장 높았고 다음은 Carnation, 안개초의 순이었다. 4) 다목적 계획 수립 기법을 이용한 이익의 극대화와 농번기 노동력의 최소화를 동시에 만족시켜주는 해결책으로는 위험을 선호하는 형(A, E 대안), 위험을 기피하는 형 (B대안), 중립적인 형(D대안)의 4가지 형태의 대안으로 나타났다. This case study is to investigate a real management condition of cut flower production farm houses and then to make indices for economic analysis, and on the basis of that, to generate a few possible alternatives for farmer's decision-making from problems involving conflicting goals which were related to maximize total gross margin and to minimize labour requirements in labour peak season such as April by multiobjective programming using NISE method. 18 farms located in Kimhae and Pusan area were selected as sample farms and surveyed for analysis. The results were as follows; Average farm area per farm house surveyed was 1,550 pyeong and 75.7% of area was leased, and self labour power and employment labour power per farm house was 2.4 and 1.7 persons, respectively. 9 crops such as carnation, rose, gypsophila, gerbera, chrysanthemum, gladiolus, iris, snapdragon and freesia were presently cultivated as 21 cropping patterns. Labour requirement was the largest for rose by 1,578 hours, and benefit coefficient was the largest for rose by 7,748 thousand won per 100 pyeong and followed by carnation and gypsophila. The alternatives of possible policies for cut flower production were found to be A and B as aggressive policies and C as a moderate policy, finally B as a conservative policy.

2-Cinnamoyl thiophene의 가수분해 반응메카니즘

권기성,맹주양,박천규 충남대학교 1985 忠南科學硏究誌 Vol.12 No.2

The rate constants for the hydrolysis of 2-cinnamoylthiophene were determined by UV spectrophotometry in 50% methanol-water at 29℃ and a rate equation which can be applied over wide pH range was obtained. From this equation, we may conclude the following: above pH12, the over-all rate is only dependent on the concentration of hydroxide ion and below pH 10, the reaction is initiated by the attack of water molecule on the activated carbon-carbon double bond. In the range of pH from 10 to 12, these two reactions occur competitively.