치환기 특성에 따른 아민흡수제와 CO₂의 반응특성 평가

심재구,이정현,정진규,곽노상,Shim, Jae-Goo,Lee, Junghyun,Jung, Jin-Kyu,Kwak, No-Sang 한국전력공사 2020 KEPCO Journal on electric power and energy Vol.6 No.3

The reaction of carbon dioxide with the amine-based absorbents which have various substituents in the molecule was described. In the case of MEA which is a representative primary amine, the absorption reaction was proceeded very fast while the regeneration reaction was took place slowly due to the strong bond strength between the absorbent and carbon dioxide. The more substituents on N atom of the absorbent, the slower the absorption reaction between carbon dioxide and the absorbent, which in turn causes faster the regeneration rate from the reaction intermediate, carbamate.

Sodium Glycinate 수용액의 CO₂흡수특성 및 반응 메커니즘 해석

심재구(Jae Goo Shim),김준한(Jun Han Kim),장경룡(Kyung Ryong Jang) 大韓環境工學會 2008 대한환경공학회지 Vol.30 No.4

고효율 습식 아민 CO2 흡수제(KoSol-4)를 적용한 Test bed 성능시험

심재구 ( Jae Goo Shim ),이지현 ( Ji Hyun Lee ),곽노상 ( No Sang Kwak ),이인영 ( In Young Lee ),장경룡 ( Kyung Ryoung Jang ),장세규 ( Se Gyu Jang ),이경자 ( Kyung Ja Lee ),한광수 ( Gwang Su Han ),오동훈 ( Dong Hun Oh ) 한국화학공학회 2013 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.51 No.2

Test bed studies with highly efficient amine CO2 solvent (KoSol-4) developed by KEPCO research institute were performed. For the first time in Korea, evaluation of post-combustion CO2 capture technology to capture 2 ton CO2/day from a slipstream of the flue gas from a coal-fired power station was performed. Also the analysis of solvent regeneration energy was conducted to suggest the reliable performance data of the KoSol-4 solvent. For this purpose, we have tested 5 campaigns changing the operating conditions of the solvent flow rate and the stripper pressure. The overall results of these campaigns showed that the CO2 removal rate met the technical guideline (CO2 removal rate: 90%) suggested by IEA-GHG and that the regeneration energy of the KoSol-4 showed about 3.0~3.2 GJ/tCO2 which was, compared to that of the commercial solvent MEA (Monoethanolamine), about 25% reduction of regeneration energy. Based on these results, we could confirm the good performance of the KoSol-4 solvent and the CO2 capture process developed by KEPCO research institute. And also it was expected that the cost of CO2 avoided could be reduced drastically if the KoSol-4 is applied to the commercial scale CO2 capture plant.

수용액상 니트로스아민의 UV 광분해에서 pH 영향

심재구 ( Jae-goo Shim ),아프잘아킬 ( Afzal Aqeel ),최보미 ( Bo-mi Choi ),이정현 ( Jung-hyun Lee ),곽노상 ( No-sang Kwak ),임호진 ( Ho-jin Lim ) 한국물환경학회(구 한국수질보전학회) 2016 한국물환경학회지 Vol.32 No.4

N-nitrosamines are a class of carcinogenic chemicals that can pose significant hazards to the human life. Ultraviolet (UV) light irradiation is considered as one of the effective methods to reduce N-nitrosamines in the aqueous phase. This study aimed to investigate the pH influence on UV photodegradation of N-nitrosamines (i.e., N-nitrosodibutylamine (NDBA) and N-nitrosopyrrolidine (NPYR)) closely related to water treatment. Photodegradation rate constants of NDBA and NPYR remained between 3.26×10-2 L/W-min to 5.08×10-3 L/W-min and 1.14×10-2 L/W-min to 2.80×10-3 L/W-min at pH2-10, respectively. This study also focused on the formation of oxidized products (i.e., primarily NO2- and NO3-). Under slightly acidic and eutral conditions, NO2- formation was more prevalent than NO3- formation, while under strong acidic conditions, NO3- was more prevalent. There was no significant change in total organic carbon (TOC) and total nitrogen (TN), suggesting negligible loss of N-nitrosamines and degradation products from the system. NDBA was easily photodegraded than NPYR. This study also demonstrated that a lower pH is a favorable condition for photolytic degradation of N-nitrosamines in water.

방사선과 학생의 스마트 학습법 적용이 자기 주도적 학습능력, 학업적 자기 효능감, 학습 만족도에 미치는 영향

심재구(Jae-Goo Shim)김연민(Yon-Min Kim),박수진(Soo-Jin Park) 대한방사선과학회(구 대한방사선기술학회) 2016 방사선기술과학 Vol.39 No.4

본 연구는 보건 계열 방사선과 학생들을 대상으로 스마트러닝 강의에 대한 학습법을 진행한 후에 스마트러닝 강의에 대한 설문조사를 토대로 학생들에게 학습효능감 및 학습만족도의 관계를 실증적으로 분석하여 학습 성과 향상을 위한 시사점을 제시하고 실질적인 교육을 활성화할 수 있는 방안을 모색하고자 한다. 2016년 3월부터 6월 까지 총 120명을 설문하여 응답자 수 102명(남자: 65명 여: 37명)의 설문지가 회수되었다. 자료 수집방법은 자가 보고형 질문지 방식으로 진행하였으며, 자기주도적 학습능력은 5점 만점에 평균 3.46±0.50, 학업적 자기효능감은 6점 만점에 평균 3.60±0.89, 학습만족도는 5점 만점에 평균 3.62±0.62으로 나타났다. 자기주도적 학습능력은 학업 적 자기효능감(r=0.639, p<0.01)과 학습만족도(r=0.435, p<0.01)와 통계적으로 유의한 상관관계가 있는 것으로 나 타났다. 그리고 학업적 자기효능감은 학습만족도와 통계적으로 유의한 상관관계가 있는 것으로 나타났다(r=0.513, p<0.01). 스마트러닝을 통한 학습법을 진행하는 경우 자기주도적 학습능력, 학업적 자기 효능감, 학습 만족도에서 유의한 결과를 보여 주고 있으며, 스마트러닝을 통한 학습법의 인식과 필요성에 대해 긍정적인 반응이 나타났으며, 스마트러닝 학습법을 통한 학습만족도와 학업적 자기효능감의 유의한 상관관계를 통해 방사선과에서도 쌍방향 커 뮤니케이션을 통한 강의법의 적용이 필요하다고 사료된다. The purpose of this was to study and analyze smart learning the self directed learning, self efficacy, learning satisfaction about department of radiology in a college. For this study total students 102 in 3 classes were surveyed at the end of semester. The research data was analyzed using SPSS also self directed learning ,self learning efficacy, learning satisfaction analyzed t-test, ANOVA and Pearson’s correlation coefficient results were followings. First, Men is more higher than women in a self learning efficacy, self directed learning, learning satisfaction. Second, in a learning satisfaction smart learning ever heard in a first time group more satisfaction. Third, during the smart learning classes a students appeared a positive response. As a results, learning satisfaction will increase a learning when learners need a ability of self control planning and learning motivation by themselves in voluntarily and actively. Suggest to change a paradigm in a radiology classes so we have to improve a teaching skills this solution recommend is two way communication. In conclusion, smart learning applied for classes of college is meaningful as a new teaching, which can be change gradually learning satisfaction by teaching methods.

스마트 학습법이 보건 계열 학생들에게 성취목표지향성 및 학업적 자기 효능감이 미치는 효과

심재구(Jae-Goo Shim),박수진(Soo-Jin Park) 한국방사선학회 2017 한국방사선학회 논문지 Vol.11 No.4

스마트 학습법을 적용한 학생과 적용하지 않은 학생들을 대상으로 자기주도적 학습능력 및 학업적 자기 효능감이 효과적으로 적용되었는지 알아보고 향 후 보건 계열 방사선과 전공과목에 스마트 학습법을 적용한 효과에 대해 논의 및 향 후 발전적인 방향에 대해 제언하고자 한다. 2016년 3월부터 6월까지 한 학기동안 스마트 학습법으로 강의를 받은 학생과 스마트 학습법을 적용하지 않은 학생 두 분류로 나누었고 자료 수집방법은 자가 보고형 질문지 방식으로 진행하였다. 스마트 학습법으로 강의를 받은 교육군이 비교육군에 비해 자기주도 학습능력를 검정한 결과, 5점 만점에 교육군이 3.46점, 비교육군이 2.63점으로 통계적으로 유의한 차이가 있는 것으로 나타났고(t=9.721, p=.000), 성취목표지향성을 검정한 결과, 교육군이 3.12점, 비교육군이 2.92점으로 통계적으로 유의한 차이가 있는 것으로 나타났다(t=4.544, p=.000). 위의 결과로 스마트학습법이 자기주도학습, 학업적 자기효능감 및 학습 만족도에 대해 긍정적인 영향을 보여줬으며, 향후 보건 계열 학과에서도 교수자는 학습자와 쌍방향 커뮤니케이션을 통해 강의의 질적 향상을 위해 학습 변화가 필요하다. The purpose of this was to study and analyze smart learning the self directed learning, self efficacy, learning satisfaction about department of radiology in a college. For this study total students 74 in 2classes were surveyed at the end of semester. Compared to use smartphones one group and not use smartphones one group for study in a class. The research data was analyzed using SPSS also self directed learning ,self learning efficacy, learning satisfaction analyzed t-test, general character was analyzed two group(one : Used smart learning other : not Used smart learning) χ2-test. First, Used smart learning group is more higher than not Used smart learning group in a self learning efficacy, self directed learning, learning satisfaction. Second, during the smart learning classes a students appeared a positive response. Suggest to change a paradigm in a radiology classes so we have to improve a teaching skills this solution recommend is two way communication. In conclusion, smart learning applied for classes of college is meaningful as a new teaching, which can be change gradually learning satisfaction by teaching methods.

방사선종양학과 방사선사의 직무 만족에 관한 조사 연구

심재구(Jae-Goo Shim),정홍량(Hong-Ryang Jung),유인규(In-Kyu You) 한국콘텐츠학회 2012 한국콘텐츠학회논문지 Vol.12 No.8

본 연구는 서울, 경기 지역의 의료 기관에 종사하는 방사선 종양학과 방사선사 211명을 대상으로 직무 스트레스가 조직 효과성에 미치는 영향의 요인별 신뢰도를 분석하였으며, 조직문화와 셀프 리더쉽의 각각의 유형을 분류하기 위해 요인분석을 시행한 결과는 다음과 같다. 직무몰입과 조직 만족도는 성별, 연령에 차이는 없었으나 근무 년 수가 1년 미만과 15년 이상인 경우 유의한 차이를 보였고, 직책이 높을수록 조직 몰입도와 조직 만족도가 높게 나타났다. 각 파트별 근무에 따른 조직 몰입 및 근무 만족도에 대해서는 유의한 차이가 나타나지 않았다. 방사선 종양학과의 직무 특수성간 상관관계를 분석한 결과 직무만족(r=0.601, p<0.001), 조직몰입(r=0.522, p<0.001), 스트레스(r=0.605, p<0.001), 조직문화의 위계지향 (r=-0.182, p=0.008), 조직문화의 혁신지향 (r=0.212, p<0.002), 조직문화의 관계지향 (r=0.453, p<0.001), 셀프리더십의 자부심 (r=0.387, p<0.001), 셀프리더십의 리허설과 자기관찰(r=0.242, p<0.001), 셀프리더십의 자기목표설정(r=0.249, p<0.001), 셀프리더십의 자기보상 (r=0.341, p<0.001) 항목들은 모두 유의한 상관 관계를 보이고 있다. 본 연구의 결과를 통해 향 후 방사선 종양학과 방사선사의 직무 만족도 조사를 통해 효율적인 인력 및 조직 관리 방안을 마련하는데 도움이 될 것으로 사료된다. This study Seoul, Kyonggi area hospital and data were collected from 211 people in radiation therapy technologist. The collected data were analyzed by using SPSS 17 version, For verification of the differences among groups, coefficient of Pearson was executed. It was composed of social demogrphic characteristics, Job stress and the impact the organization effectiveness and reliability analysis of factors. Organization culture and self leadership of each of the types to classify the results of conducted analysis factors are as follows: And the difference in the gender, age, and satisfaction with the Organization. Organization commitment and working in accordance with each part working experience is different. Radiation therapy duties analysis results of correlation between the uniqueness. Job satisfaction(p<0.001), organization commitment(p<0.001), stress(p<0.001), organization culture, gastric-oriented(p=0.008), organization culture and innovation-oriented(p<0.002), organization culture, relationship - oriented (p<0.001). The research shows that job satisfaction of radiation therapy technologist determined the work environment. Therefore more improvements must be made for radiation therapy technologist to be more in their job satisfaction.

방사선과 학생을 위한 가상현실 교육콘텐츠 개발 및 적용을 통한 학습효과 분석

심재구(Shim Jae-Goo),권순무(Kwon Soon-Moo) 대한방사선과학회(구 대한방사선기술학회) 2020 방사선기술과학 Vol.43 No.6

This study developed radiation therapy contents based on virtual reality technology and applied them to radiation students. A survey was conducted to analyze the relationship between learning effects and learning satisfaction to students who used virtual reality education videos to analyze their learning performance. 71 students radiology department were classified into two groups one that experienced virtual reality and the other that did not experienced virtual reality. We surveyed between the two groups analyzed self-directed learning, self-learning efficacy and learning satisfaction. As a result, the comparison between the two groups showed no difference between self-directed learning and self-learning efficacy. But the learning satisfaction was significant from 2.64±0.83 to 3.20±0.88 in the problem solving process for groups applying virtual reality contents. Therefore, learning satisfaction has improved experienced group virtual reality content and the materials for virtual reality education can be applied more efficiently in non-face-to-face lectures.

국내 포집기술 확보 현황 및 대용량 실증계획

심재구(Jae Goo Shim),곽노상(No-Sang Kwak),이지현(Ji Hyun Lee),이인영(In Young Lee),이동욱(Dong Woog Lee),장경룡(Kyung Ryong Jang) 대한지질학회 2015 대한지질학회 학술대회 Vol.2015 No.10

방사선치료 시 체질량지수와 직장암 환자의 자세 오차 분석

심재구(Jae-Goo Shim),정홍량(Hong-Ryang Jung),서정민(Jung-Min Seo),박병석(Byong-Suk Park),장준영(Joon-Young Jang),임청환(Cheong-Hwan Lim) 한국콘텐츠학회 2013 한국콘텐츠학회논문지 Vol.13 No.10

직장암 환자 방사선 치료 시 체질량지수와 belly board 사용 유?무에 따른 자세 오차 연구를 위해 2012년 1월부터 2013년 3월까지 114명을 대상으로 후향적 연구를 실시하였다. 환자의 평균 나이는 58세(29-83세), 평균 체질량 지수는 23.35 kg/m2(16.55-31.15kg/m2), belly board를 사용한 환자는 31명, 사용하지 않은 환자는 83명이었으며, 치료 확인 촬영 영상 AP&LAT(전, 후측) 총 527장의 X, Y, Z축에 대한 각각의 평균 및 표준 편차는 1.66±1.55mm, 1.64±1.56mm, 1.99±1.75mm의 값으로 나타났다. 체질량지수 24이상을 기준으로 하였을 경우 24미만일 경우보다 Z축에서 2mm이상의 오차 발생 위험도가 4.8배 높게 나타났고 (p<0.001), belly board를 사용하지 않은 경우 체질량 지수가 24이상인 경우 Z축에서 2mm이상의 오차 발생 위험도가 3.6배 높게 나타났다(p<0.011). 직장암 환자의 방사선 치료 시 장루를 착용한 경우에만 Belly Board사용 뿐 만 아니라 체질량 지수가 높은 환자에게도 적용한다면 자세 오차를 줄이는데 효과적일 것이라 사료된다. To study the positioning error according to the use of belly board and body mass index (BMI) for rectal cancer radiotherapy, a retrospective study was conducted on 114 patients from January 2012 to March 2013. The median age of the patients was 58 (29-83 years), mean BMI was 23.35 kg/m2 (16.55-31.15kg/m2), 31 patients used belly board and 83 did not use belly board. There were a total of 527 AP & LAT images of treatment (EPID), and the mean and standard deviation of each X, Y, Z axis were 1.66±1.55mm, 1.64±1.56mm, and 1.99±1.75mm, respectively. Based on the BMI of 24 or higher, error occurrence risk of higher or equal to 2mm on Z axis was 4.8 times higher compared to BMI of 24 or lower (p<0.001), and when BMI was 24 or higher in case the belly board was not used, the error occurrence risk of higher or equal to 2mm on the z-axis was 3.6 times higher (p<0.011). Radiation therapy for rectal cancer patients, using Belly Board for both the ones wearing fistula and with high BMI may be effective in decreasing the positioning errors.