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권성옥,오병성,금채 충남대학교 기초과학연구소 1997 忠南科學硏究誌 Vol.24 No.2
A high power excimer laser was developed as a light source for the decontamination of polluted metal surface. In this paper, the electrical parameter and gas mixing ratio were investigated for attainment of 150 W excimer laser. Our high power laser system was constructed with a steamline gas flow loop and magnetic pulse compression circuit using the saturable magnetic core. We have obtained average power of 150 W with XeCl laser gas. The output pulse energy and efficiency are 1.7 J/pulse, 1.7%, respectely.
국내 가정간편식의 시장 규모, 구매 및 섭취 실태 분석의 문제점
권성옥,최인주,주유정,윤지현 대한지역사회영양학회 2022 대한지역사회영양학회지 Vol.27 No.6
Objectives: This study examined the problems encountered when analyzing the market size, purchase, and consumption of HMR (home meal replacements) in the Republic of Korea. Methods: The macro data relevant to the market size and purchase status of HMR were critically summarized. The micro data retrieved from the 2019 & 2020 Korea National Health and Nutrition Examination Survey (KNHANES) were analyzed to understand the consumption of HMR. Results: The Korea Agro-Fisheries & Food Trade Corporation and the Ministry of Food and Drug Administration reported the market size of HMR, whereas the Korean Rural Economic Institute and the Rural Development Administration reported the purchase expense and frequencies of HMR. Since the values on the market size and purchase status were calculated or surveyed using different scopes of HMR, there have been reliability issues for the data presented. Additionally, lack of consensus on the use of Korean terms corresponding to HMR was found to be a problem. To examine the consumption of HMR, analysis of the food intake data from KNHANES presented results with very low validity due to the inappropriate survey and coding scheme not reflecting the inclusion of new food types. Conclusions: Several problematic discrepancies were encountered in the statistics on HMR. The fundamental cause of these problems was the absence of agreement on the scope of HMR and the Korean terms corresponding to it. Considering the increasing importance of HMR in Korean diets, urgent cooperative efforts are required between the government and academia to derive an agreed Korean term and establish the scope of HMR.
권성옥(Seong-Ok Kweon) 한국컴퓨터정보학회 2018 韓國컴퓨터情報學會論文誌 Vol.23 No.6
This study examined the work - family relationship of married women in the digital age centered on avoidance of childbirth. Married women "s age, education level, family members living together, work - family affects the avoidance of childbirth. Also, it is analyzed that similar childbirth avoidance phenomenon occurs in the result of the number of future children. Based on the results of the research, it can be suggested that the support of the family living together, the stable employment of married women, and the family-friendly incentive system will have a positive effect on childbirth.
권성옥(Seong Ohk Kwon),하동윤(Dong Yoon Ha),이희정(Hee Jeong Lee),김선기(Seon Ki Kim),서동수(Dong Soo Suh),장동수(Dong Soo Chang) 대한CT영상기술학회 2005 대한CT영상기술학회지 Vol.7 No.1
Purpose In this study, In order to decrease of exposure rate and attain better image quality for protect pediatric patients. We investigated to find the optimal exposure factors for pediatric patients in computed tomography. Materials and methods : We performed this study to assesment exposure rates from using the pencil type Ionization chamber. We are using the 16 channel multi detector computed tomography(16-MDCT) on General Electric Lightspeed ultra 16. In this Experimental phantom made of each brain and abdomen types to 5kg, 5~10kg, 10~20kg, 20~40kg, 40~60kg, more 60kg etc(Standard of korea child growth 표). Results The results obtained were as followed : 1) Optimal Exposure factor of brain Phantom is : 100kVp~120kVp, 160mA~200mA(Weighting steps) 2) Optimal Exposure factor for Abdomen Phantom is : 80kVp~100kVp, 60mA~180mA(Weighting steps) 3) Measured Exposure rates : 10%~180%,(using the adult Exposure factor) 4) Measured Exposure rates : -30%~110%,(decease of one steps Exposure factor) 5) Abdomen Phantom Exposure rates is more than brain Phantom caused of beam hardening artifact in brain. Conclusion From the results of these studies, It is suggested that which are using the optimal exposure factor to decrease exposure rate and attain better image quality for protect pediatric patients. We are need to standard official certification in order to avoid of radiation hazard.
사회복지관 사회복지사의 소명의식이 직무열의에 미치는 영향에 관한 연구
권성옥(Seong-Ok Kweon) 한국컴퓨터정보학회 2016 韓國컴퓨터情報學會論文誌 Vol.21 No.9
This study is aimed to examine the relationship between calling and job engagement of social workers working at social welfare centers. To this end, the study conducted a self-administered survey of social workers working at social welfare centers in Gwangju Metropolitan City, analysing 154 questionnaires. It was found that the calling of social workers has a significant positive effect on their vitality, dedication and commitment. Based on these, this study discusses its implications and suggests policy implications that can enhance the calling of social workers so as to help them raise their job engagement levels.
권성옥(Seong-Ok Kweon) 한국컴퓨터정보학회 2017 韓國컴퓨터情報學會論文誌 Vol.22 No.1
This study is aimed to examine the effects of juvenile delinquents’ self-esteem on their sociality. To this end, the study conducted a survey of 549 secondary and tertiary students (534 males and 15 females) in delinquent reformatories in four major cities such as Seoul, Busan, Daegu and Daejeon. The result showed that the self-esteem of juvenile delinquents has a significant positive effect on with leadership, autonomy and reliability. Moreover, their self-esteem at home also has a significant positive effect on autonomy. Based on these findings, the study presents implications and suggestions for future studies.
Dual Source CT와 Multi Detector CT에서 Coronary 검사의 방사선량 분석
권성옥(Seong Ohk Kwon),하동윤(Dong Yoon Ha),최준호(Joon Ho Choi),이상우(Sang Woo Lee),서동수(Dong Soo Suh) 대한CT영상기술학회 2007 대한CT영상기술학회지 Vol.9 No.1
Purpose This study compared an exposure dose of DSCT with MDCT in cardiac CT and we analyzed how much the radiation dose increased or decreased. Materials and Methods For an experiment, CT device for the human body was used by 16 channel MDCT(Multi Detecter CT) manufactured by siemens and DSCT(Dual Source CT) called by SIEMENS Somatom Definition CT. It is available for supplying two source with each different kVp and mAs, processing and gathering the data at the same time. we used ECG Simulator(Marquette Electronics. USA) for examining a change of Heart Rate. An experiment method compares CTDIvol and CTDIDLP of DSCT with MDCT and is to measure. it was performed by using ECG Simulator in DSCT Coronary study, giving Heart Rate with a variety of numerical value, such as 50bpm, 55bpm, 60bpm, 65bpm, 70bpm, 75bpm, 80bpm, 85bpm, 90bpm, 95bpm, 100bpm, 105bpm, 110bpm, according to high or low of each heart rate, comparing and measuring CTDIvol and CTDIDLP, we can know whether there is some differences. Results 1. The Coronary study protocol of MDCT is 120kVp, 600mAs, Rotation time 0.37sec, Scan Time 18~20sec. CTDIvol and CTDIDLP measured each 46.80mGy, 936mGy. The Coronary study protocol of DSCT is 120kVp, 300mAs, Rotation time 0.33sec, Scan Time 8~10sec. CTDIvol and CTDIDLP measured each 47.45mGy, 427.05mGy. As a result, CTDIDLP was reduced about 55% in DSCT compared with Multi Detecter CT though CTDIvol is similar. 2. Heat rate of Coronary Study used ECG Simulator in DSCT is 50bpm, 55bpm, 60bpm, 65bpm, 70bpm, 75bpm, 80bpm, 85bpm, 90bpm, 95bpm, 100bpm, 105bpm, 110bpm. according to high or low of each heart rate, CTDIvol is measured to 60.81mGy in 50bpm and 29.llmGy in 110bpm. 3. CTDIvol and CTDIDLP of MDCT used Coronary study protocol is measured to 46.80mGy and 936mGy. measured CTDIvol of DSCT is 29.11~60.81mGy in 50bpm ~110bpm heart rate and CTDIDLP is measured to 261.99~547.29mGy. Conclusion The Dual Source CT is increased 29.9%~0.1% of CTDIvol in 50bpm ~ 110bpm compared with the Multi Detecter CT. And the CTDIvol in 70bpm ~ 110bpm was reduced by 9%~37.8. In the Single Source the Table speed came to be late as a heart rate increase. On the other hand, The Table speed of DSCT did fast according to the increase of the Heart Rate and The Scan time is reduced. When heart rate is slow, CTDIDLP of Dual Source CT is reduced by 41.6 % compared with Multi Detecter CT and When heart rate is fast, CTDim.P of Dual Source CT is reduced by 72.1% compared with Multi Detecter CT.