정류방식에 따른 장치의 정확도와 출력 파형의 비교

이인자,Lee, In Ja 대한방사선과학회 2018 방사선기술과학 Vol.41 No.6

This study examined the following: accuracy of the exposure conditions in the inverter device and three-phase device; output waveform over the exposure conditions; and average and standard deviation of the output waveform. After assessing whether the dose corresponding to the theoretical dose was presented, the following conclusions were obtained: 1. The accuracy of the tube voltage(kVp) and tube current(mA) exposure time(sec) was within the tolerable level prescribed in Korea's Safety Management Standards. In the error, Inverter device was large the tube voltage and exposure time, the three-phase device was large the tube current. 2. In terms of the output waveform of the exposure conditions and the average and standard deviation of the output waveform, the higher tube voltage and larger tube current resulted in greater standard deviation in pulsation. Moreover, the standard deviation of pulsation was shown to be greater in the inverter device than the three-phase device; there was also greater standard deviation in the inverter device considering the exposure time. 3. Regarding the exposure conditions over the output dose, all linearity showed the coefficient of variation which had an allowable limit of error within 0.05. Although the output dose ratio for the inverter device was 1.00~1.10 times no difference that of the three-phase device, there was almost no difference in dose ratio between the tube currents.

Effects of SDS and Temperature on the Structural Changes of Bacteriorhodopsin

이인자,임형식,박동곤,김건,Lee In-Ja,Lim Hyung-Sik,Park Dong-Gon,Kim Keon Korean Chemical Society 1989 Bulletin of the Korean Chemical Society Vol.10 No.1

Effects of SDS and temperature on the conformational changes of bacteriorhodopsin were studied using a, b, c bands of bacteriorhodopsin. In the SDS denaturation, bacteriorhodopsin in purple membrane was more labile than bacteriorhodopsin reconstituted into PC vesicles. These rather interesting results may be understood by effective SDS concentration in lipid layer.

비광화학적인 홀의 생성에 대한 속도론적 모델 : 유사 3-준위계

이인자,Lee, In-Ja 대한화학회 1995 대한화학회지 Vol.39 No.10

Weak burn intensity limit에서 홀의 깊이를 계산하는 기존의 이론을 임의의 burn 세기에서도 계산할수 있도록 NPHB kinetic에 관한 유사 3-준위계를 이용하여 확장하였다, 이 모델은 같은 burn fluence에 대하여 burn 세기가 클 때는 다른 홀의 깊이를 burn 세기가 약한 경우에는 같은 홀의 깊이를 나타내었다. 이 모델을 이용하여 계산된 홀 성장곡선들과 기존의 oxzaine720/glycerol와 tetracene/MTHF glass의 실험 데이타를 비교하였다. The theory previously proposed to simulate hole depth in the weak burn intensity limit is extended to examine the hole depth at arbitrary burn intensity using 3-level system model. The hole spectrum simulated using constant fluence gives different hole depth for strong burn intensity while it gives same hole depth for weak burn intensity region. The calculated hole growth curves are compared with published experimental data for oxazine720 in glycerol and tetracene in MTHF glass.

펩티드-물 상호작용. 1-페닐-2-아세트아미도 3-부탄온의 용해도에 대한 압력과 온도의 영향

이인자,강상욱,신두순,김건,In-Ja Lee,Sang-Wook Kang,Doo-Soon Shin,Keon Kim 대한화학회 1982 대한화학회지 Vol.26 No.5

수용액 속에서 1-페닐-2-아세트아미도-3-부탄온의 용해도를 20, 30, 40$^{\circ}$C 에서 또 1kg/$cm^2$에서 4500 kg/$cm^2$까지의 압력에서 측정하였다. 압력이 커질수록 용해도는 감소한다. 이러한 용해도 변화는 디케토피페라진과 아주 비슷하다. 디케토피페라진이 펩타이드 결합의 모델 화합물이라는 점과 1-페닐-2-아세토아미도-3-부탄온이 한개의 펩타이드 결합과 상당히 큰 소수성 작용기를 가졌다는 점을 고려할 때 이와 같은 용해도 변화는 예상 밖이다. 부피 변화와 열용량 변화에 대한 값은 이상하다고 할 정도는 아니었다. The solubilities of 1-phenyl-2-acetamido-3-butanone were measured in $H_2O$ at 20, 30 and 40$^{\circ}$C at pressure from 1 to 4500 kg/$cm^2$. Pressure going up to 4500 kg/$cm^2$, the solubility in $H_2O$decreases consistantly as that of diketopiperazine does. As diketopiperazine is a model compound of peptide bond and 1-phenyl-2-acetamido-3-butanone has only one peptide bond and a pretty large hydrophobic group, the solubility behavior is quite surprising. Volume change and heat capacity change data are reasonable.

Aging Effect on the Thermal Bleaching Reaction of Photomerocyanine Form of Spironaphthooxazine Doped in Polystyrene Film

이인자,Lee, In Ja Korean Chemical Society 2001 Bulletin of the Korean Chemical Society Vol.22 No.2

논문편 - 의생활 분야 : 여성의 직업과 의상흥미 영역간의 상관성 연구

이인자,간문자 ( In Ja Lee,Moon Ja Kan ) 대한가정학회 1981 Human Ecology Research(HER) Vol.19 No.4

의상흥미의 국제간 비교 연구 - 한국, 일본, 대만 여대생을 중심으로 -

이인자,Lee, In-Ja 한국복식학회 1989 服飾 Vol.13 No.-

수원시 소재의 한 대학 내 환경방사선량 측정 분석

이인자(In-Ja Lee),정유진(Yu-Jin Jeong),김청경(Chung-kyung Kim),김희솔(Hee-Sol Kim),윤현민(Hyeo-Min Yoon),박다정(Da-Jeong Park),고요한(Yo-Han Ko) 대한방사선과학회 2014 방사선기술과학 Vol.37 No.3

경기도 수원시에 있는 한 대학의 두 건물(오래된 건물과 새 건물)의 실내외(지하, 옥상)에서 2013년 4월 첫 주부터~ 2014년 3월 말 주 까지 1년간 1주일에 2회씩 환경방사선량을 측정한 결과 다음과 같은 결론을 얻었다. 1. 두 건물의 환경방사선량은 0.169727μSv/hr이었고, 가장 작게 측정된 값은 0.076μSv/hr이었고, 가장 높게 측정된 값은 0.300μSv/hr이었다. 2. 오래된 건물의 환경방사선량이 0.176374μSv/hr, 새 건물이 0.163053 μSv/hr로 오래된 건물에서 더 높게 측정되었다. 3. 1년 중 가장 낮게 환경방사선량이 측정된 달은 11월로 평균 0.152844 μSv/hr이고, 가장 높게 측정된 달 은 5월로 평균 0.197222μSv/hr이다. 4. 측정 장소 비교에서 실내의 환경방사선량은 0.164649μSv/hr, 실외는 0.174779 μSv/hr로 실외에서 높게 측정되었다. 5. 계절별로 가장 낮게 측정된 환경방사선량은 겨울로 0.157788μSv/hr이고, 가장 높게 측정된 계절은 봄 0.183846 μSv/hr이며, 봄, 여름, 가을, 겨울 순으로 적게 측정되었다. The amount of environmental radiation was measured in the indoor(basement) and outdoor(rooftop) of the two buildings of the University (the old building and the new building) in Suwon City, Gyeonggi Province. Measuring the environmental radiation dose from the first week of April 2013 to last week of March 2014, Twice a week, one year. The measured results were as follows. 1. The average annual environmental radiation of the two buildings were 0.169727μSv/hr. The lowest val-ue was 0.0760μSv/hr whereas the highest value was 0.3000μSv/hr. 2. The amount of environmental radiation dose was 0.176373999μSv/hr in the old building and the amount of environmental radiation dose was 0.163052885μSv/hr in the new building. The old building environmental radiation dose was higher then the new building. 3. The month of the lowest amount of environmental radiation dose in a year was November resulting in 0.152844μSv/hr whereas May was found the month of the highest amount of environmental radiation dose showing with 0.197222μSv/hr. 4. The amount of environmental radiation dose in the indoor(basement) was 0.164649μSv/hr and the amount of environmental radiation dose of the outdoor(rooftop) was 0.174779μSv/hr. And the out-door(rooftop) was higher than the indoor(basement). 5. Depending on seasonal, the lowest amount of environmental radiation dose was in winter with 0.1632μ Sv/hr while spring was the season with the highest amount of environmental radiation dose with 0.183846μSv/hr. The measured amount was high in the order of spring, summer, autumn, and winter.

성인의 연령, 체질량지수 및 생활습관과 골밀도의 관계

박성옥(Soung-Ock Park),이인자(In-Ja Lee),신귀순(Gwi-Soon Shin) 대한방사선과학회(구 대한방사선기술학회) 2008 방사선기술과학 Vol.31 No.4

한국건강관리협회에 내원한 환자 중 설문에 응해준 268명(여성 136명, 남성 132명)의 연령, 체질량지수(BMI) 및 생활습관과 골밀도(BMD)의 관계를 연구하였다. 골밀도는 이중에너지 X선 흡수계측기를 이용하여 요추(lumbar spine)와 대퇴경부(femoral neck)에서 측정하였다. 그 결과 다음과 같은 결론을 얻었다. 여성의 평균키는 155.8±6.0 cm, 평균체중은 56.8±7.9 kg, 평균체질량지수는 23.4±3.1 kg/m2으로 나타났으며, 남성의 평균키는 169.1±6.0 cm, 평균체중은 69.0±9.5 kg, 평균체질량지수는 24.1±2.7 kg/m2이었다. 연령이 증가할수록 골밀도가 감소되었으며, 연령과 골밀도는 매우 유의한 관련성을 보였다(p < 0.01). 그러나 여성의 골밀도는 50대 이후에 급격히 감소되는데 비해, 남성의 골밀도는 연령의 증가와 더불어 점진적으로 감소되었다. 그리고 남녀 모두 요추의 골밀도가 대퇴경부의 골밀도보다 낮았다. 체질량지수가 증가 할수록 골밀도가 대체로 높아졌으며, 특히 50대에서는 뚜렷하게 높아졌다. 그러나 이들의 관계는 통계적으로 유의하지 않았다. 골밀도 범주의 분포를 보면, 여성은 40대까지는 정상이 대부분이었으나, 50대에서는 정상과 골감소증의 비율이 비슷하였으며 60대 이상에서는 골다공증이 많았다. 그러나 남성은 70대를 제외한 모든 연령층에서 대부분 정상의 골밀도 범주에 속했다. 커피나 탄산음료는 골밀도에 영향을 주지 않았으나, 음주는 영향을 주었다. 음주집단이 비음주집단보다 골밀도가 높았으며, 유의한 관련성(p < 0.05)을 보였다. 또한 흡연과 운동은 골밀도와 유의한 상관관계를 나타내지 않았다. We studied the change of bone mineral density (BMD) by age, body mass index (BMI), coffee, carbonated drink, alcohol, smoking, and exercise in adults who checked in health center. The number of study subjects was total 268 persons (women of 136 persons and men of 132 persons). The BMD was determined in lumbar spine and femoral neck by dual energy x-ray absorptiometry. And we got some results as below : 1. In women, mean body height was 155.8±6.0 cm, mean body weight was 56.8±7.9 kg, and mean BMI was 23.4±3.1 kg/m2. In men, mean body height was 169.1±6.0 cm, mean body weight was 69.0±9.5 kg, and mean BMI was 24.1±2.7 kg/m2. 2. BMD decreased as age increased, and the age was the most determinant factor for BMD (p < 0.01). Women's BMD decreased rapidly in the groups aged ≥ 50 s, while men's BMD decreased gradually with age. In addition, for both sex, lower BMD was measured in lumbar spine than in femoral neck. 3. BMD increased in high BMI, and BMD with BMI increased distinctly in the group aged 50 s. But their relationship was not significant. 4. In view of the distribution by three BMD categories, women's BMD was mostly normal in the groups aged ≤ 40 s, but the rate of osteopenia and osteoporosis was similar in the group aged 50 s, and the rate of osteoporosis was the highest in the groups aged 60 s and 70 s. Men's BMD was mostly normal through all groups except the group aged 70 s. 5. Coffee and carbonated drink were not influenced in BMD. But alcohol-drinking group showed higher BMD than non-drinking group, and alcohol was statistically significant determinant for BMD (p < 0.05). Smoking and exercise were not statistically significant determinant of BMD.

흉부X선 간접촬영의 촬영조건과 화질에 관한 조사연구

김학성(Hark Sung Kim),이인자(In Ja Lee),김성수(Sung Soo Kim),허 준(Joon Huh) 대한방사선과학회(구 대한방사선기술학회) 2003 방사선기술과학 Vol.26 No.4

수도권에 소재하는 의료기관 44개 곳에서 시행하는 흉부X선 간접촬영에서 사용한 간접촬영 필름의 크기에 따라 촬영조건, 화상의 물리적 평가 및 시각적 평가, 조사선량 등을 조사한 결과 아직도 대부분 저관전압 촬영을 하고 있어 적절한 촬영조건 개선이 필요하며, 화상평가 비교에서 물리적 평가에서는 비슷한 결과를 보였으나 시각적 평가에서는 100㎜ 필름을 사용한 경우가 70㎜ 필름을 사용한 경우보다 대체적으로 우수한 것으로 나타났고, 흉부표면에 조사되는 선량은 70㎜ 필름을 사용한 경우가 100㎜ 필름을 사용한 경우보다 3배 이상의 피폭이 더 되고 있어 환자의 피폭선량 경감과 화질개선에 있어서 필름 선택의 중요성을 재삼 인식시켜 주었다. chest Indirect radiography were taken at 44 medical facilities in Seoul area. The results were as follows : 1. The average tube voltage was 98.2 kVp in case of 100 mm film and 91.3 kVp in case of 70 mm film. 2. The average tube current was 18.1 mAs in case of 100 mm film and 42.5 mAs in case of 70 mm film. 3. In the physical evaluation of chest Indirect radiographs, the density in case of 100 mm film was similar to that in case of 70 mm film. 4. In the visual evaluation of chest Indirect radiographs, the score of identification in case of 1OO mm film was higher than that in case of 70 mm film. 5. The average dose of radiation into the skin was 1.38 mGy in case of 100 mm film and 4.59 mGy in case of 70 mm film. In conclusion, the image quality of chests was excellent and the dose of radiation into the skin decreased in case of 100 mm film.