질산화수 주입 방법에 따른 혐기성필터 거동 고찰

임승주,이윤진,Lim, Seung-Joo,Lee, Yoon-Jin 한국환경보건학회 2007 한국환경보건학회지 Vol.33 No.1

Characteristics of the upflow anaerobic filter process have been studied with six other conditions. When nitrate was mixed with influent in the bottom of the reactor, removal efficiencies of TBOD and TCOD were lower than those of TBOD and TCOD when nitrate was injected to the side of the reactor. In addition, when nitrate was injected to the side of the reactor the concentration of volatile acids of effluent was not high and ORP of effluent was lower than the mixture when nitrate was mingled with influent. It means that the bottom of the anaerobic filter played an important role in making volatile acids, methane production, and denitrification. Moreover, percentage of methane in the gas increased in accordance with increasing nitrate injection. It was because there were a lot of methane producing microorganisms which would rather use hydrogen than acetate. This reactor condition gets unstable due to provide nitrate. Therefore, higher hydrogen Pressure, shorter generation time, and lower standard Gibb's free energy gave great portion of methane of gas.

2-pyeidine 폴리스티렌 공중합체의 감마선 분해 내성 연구

임승주(Seung Joo Lim),권희정(Hui-Jeong Kwon) 대한환경공학회 2021 대한환경공학회 학술발표논문집 Vol.2021 No.11

「사티어 의사소통 교육」에 참여한 간호대학생들의 의사소통과 인간관계 변화 경험

임승주(Lim, Seung Joo),박은영(Park, Eun Young) 한국간호교육학회 2013 한국간호교육학회지 Vol.19 No.1

Purpose: This study was to deduce the changes of communication style and relationship patterns via self-analysis after Satir communication education for undergraduate nursing students. Methods: Thirty seven students participated in this study. The age of participants was 20 ~ 22 years and all of them were female students. Before the first semester and after the last class in 2011, we collected an evaluation from students of how their own communication style and relationship patterns changed. Using qualitative content analysis method, the data were analyzed. Results: After qualitative contents analysis, five change-related themes and 16 experience-related subjects emerged. Five themes were from self-contentment to discreet, from behavior of speaking and listening to understanding, from agreement to empathy, from your fault to my fault, and from feeling emotion to expressing emotion. Conclusion: From the results of this study, we found the essential points of changes for communication and relation ship experiences after Satir communication education and self-reflection could reinforce change in undergraduate nursing students experiences.

급수관내 염소 주입이 미생물의 증식과 부식에 미치는 영향

김태현,이윤진,임승주,Kim, Tae-Hyun,Lee, Yoon-Jin,Lim, Seung-Joo 한국환경보건학회 2006 한국환경보건학회지 Vol.32 No.5

This research was conducted using a model home plumbing system composed of copper, stainless steel, galvanized iron, carbon steel, and PVC (polyvinyl chloride) pipe. The number of bacteria present in stainless steel pipe and PVC was higher than other pipes. High turbidity and zinc release were found in galvanized iron pipe material and detected during the first 6 months. Conversely, there was a decrease in turbidity and zinc release after 6 months resulting in levels similar to other pipes. Copper concentration decreased as operation times increased. In this experiment, the number of bacteria detected in biofilm for a copper pipe continued to increase. Pipe material influenced bacterial numbers in biofilm and water. This showed that elevated chlorine could not control bacterial growth in biofilm for galvanized iron and stainless steel systems. It also suggested that the dosing of chlorine might not be available for all kinds of pipes. Therefore, another complementary method should be introduced to manage biofilm effectively in water distribution systems.

양식장 배출수중의 항생제 내성균 분포 및 전자빔 살균처리

장은희(Eun Hee Jang),임승주(Seung Joo Lim),김탁현(Tak Hyun Kim) 大韓環境工學會 2011 대한환경공학회지 Vol.33 No.7

육상양식장에서 항생제에 대한 내성을 가진 균을 분리하여 다양한 항생제에 대한 내성특성을 확인하고, 전자빔의 조사에 따른 내성균의 항생제 내성 특성변화와 살균효능에 관한 연구를 수행하였다. 메기, 송어, 뱀장어, 미꾸라지양식장의 배출수에서 분리된 균주 중 Aeromonas sp., Citrobacter sp., Bacillus sp., Marinobacter sp., Pantoea sp., Pseudomonas sp., Enterobacter sp.가 다제내성균으로 확인되었다. 양식장 배출수에서 분리한 균주 중 한가지의 항생제 내성을 가지고 있는 균은 41.7%이며, 2가지 이상의 항생제 내성을 가지고 있는 균은 58.3%로 나타났다. Quantitative Structure Analysis Relationship(QSAR) model에 의한 평가는 실험값과 매우 유사하여 독성 평가의 간접적인 지표로 이용될 수 있음을 알 수 있었다. 항생제 내성균에 대해 전자빔을 조사한 결과 1 kGy 이내의 선량에서 살균효율이 99.9%로 강한 살균력을 확인할 수 있었다. Antibiotic resistant microbes were isolated in catfish, trout, eel and loach aquaculture effluent. The distribution of antibiotic resistant microbes in aquaculture effluent and the disinfection efficiency of antibiotic resistant microbes by electron beam irradiation were investigated. It was shown that the multi-drug resistant bacteria were Aeromonas sp., Citrobacter sp., Bacillus sp., Marinobacter sp., Pantoea sp., Pseudomonas sp. and Enterobacter sp. in aquaculture effluent. 41.7% of total strains showed the resistance against one antibiotic agent, and 58.3% of total strains showed the resistance against more than two antibiotics. It was evidently shown that the toxicity and physicochemical properties of antibiotics can be estimated using Quantitative Structure Analysis Relationship (QSAR). Electron beam irradiation was very effective for the disinfection of antibiotic resistant bacteria from aquaculture effluent, in which the disinfection efficiency was approximately 99.9% with electron beam of 1 kGy.

감마선 조사에 의한 이온교환수지의 열화 및 방사성 핵종 침출 특성

최왕규(Wang Kyu Choi),임승주(Seung Joo Lim) 대한환경공학회 2022 대한환경공학회지 Vol.44 No.10

목적 : 원자력발전소에서 사용되고 있는 이온교환수지에 대하여 감마선 노출에 의한 방사성 핵종 및 유기착화제의 침출 가능성에 대하여 연구하였다. 방법 : 원자력발전소에서 가장 널리 사용되고 있는 양이온교환수지(IRN 77) 및 음이온교환수지(IRN78)를 구입하고 흡착 핵종 및 유기착화제를 모사하기 위해 감마선 핵종인 코발트 이온 및 EDTA를 흡착시켰다. 이온교환수지에 흡착된 코발트 핵종의 영향을 알아보기 위해 코발트 선원을 이용하여 감마선 조사선량 0, 300, 500, 700 kGy에 대한 이온교환수지의 열적 특성 변화와 이온교환수지에 흡착된 코발트 및 유기착화제의 침출 여부를 실험하였다. 결과 및 토의 : 이온교환수지에 감마선을 조사하는 경우 흡착기인 술폰기 및 4차 암모늄기가 분해되어 이온교환수지 흡착기에 흡착된 핵종 및 유기착화제의 침출 가능성이 있음을 알 수 있었다. 이온교환수지의 감마선 손상은 양이온교환수지에 비해 음이온교환수지에서 더 심각하게 발생하였다. 양이온교환수지의 경우 침출된 코발트 이온 및 유기물의 농도가 미미하였으나, 음이온교환수지의 경우 감마선 손상에 의해 고농도의 코발트 이온 및 유기물 농도가 검출되었다. 한편 양이온교환수지와 음이온교환수지가 혼합된 혼성이온교환수지를 사용한 경우, 양이온교환수지 및 음이온교환수지를 각각 사용한 경우에 비해 코발트 이온 및 유기물의 침출 농도가 저감되었다. 따라서 방사성 폐기물 처리시설에 양이온교환수지와 음이온교환수지를 혼합하여 보관하게 되면 핵종의 침출 가능성을 낮추어 보다 안전한 처분 방안이 될 수 있음을 알 수 있었다. 결론 : 이온교환수지에 감마선이 조사되면 이온교환수지가 열화되어 방사성 핵종 및 유기착화제가 침출될 가능성이 있으나, 양이온교환수지 및 음이온교환수지를 혼합하여 사용하여는 경우 침출 농도가 저감되어 이온교환수지의 처분 안정성이 향상되었다. Objectives : The objectives of this study were to investigate gamma radiation induced degradation and leaching behavior of nuclide and/or organic complexing agent adsorbed ion exchange resin. Methods : Cation exchange resin (IRN 77) and anion exchange resin (IRN 78) widely used in nuclear power plants were purchased. Cobalt ion and EDTA were used to represent nuclide and organic complexing agent adsorbed to ion exchange resins. Cation and anion exchange resin adsorbed cobalt ion and/or EDTA were radiated by 60Co nuclide. The radiation dose rate was 10 kGy/hr and total doses were 0, 300, 500, and 700 kGy. Results and Discussion : The sulfone and quaternary ammonium functional groups of gamma radiated ion exchange resin were degraded, indicating nuclide/organic complexing agent would be leached from ion exchange resin. It was shown that degradation of anion exchange resin was worse than that of cation exchange resin. While the high concentrations of cobalt ion and organic matter were observed in leachate from anion exchange resin, those in leachate from cation exchange resin were very low. For mixed cation and anion exchange resin, the leaching behavior of mixed resin was improved. This shows that disposal in the form of a mixed ion exchange resin was evaluated as a safer method than that of a cation or anion exchange resin alone. Conclusion : The adsorbed nuclide and organic complexing agent were leached from ion exchange resin by gamma irradiation. The leaching behavior of cation and anion exchange resin was improved by using mixed ion exchange resin.

학교 대면 수업 재개와 2차 감염자 분석 : 몬테카를로 기법 적용을 중심으로

조상섭(Sang-Sup Cho),채동우(Dong-Woo Chae),임승주(Seung-Joo Lim) 한국데이타베이스학회 2021 Journal of information technology applications & m Vol.28 No.1

In this study, we estimated the number of secondary COVID-19 infections caused by students with potential transmission potential home. When the existing Monte Carlo method was applied to Korean data, the average number of household members of the second COVID-19 infected was predicted. The summary of this study is as follows. First, in general, the number of secondary infections by students returning home from school is greatly influenced by the virus infection rate of each student group they contact while returning home from school. Korea-based empirical research on this is needed. Second, the number of secondary infections by Korean students was relatively lower than that of previous studies. This can be interpreted as being due to the domestic furniture structure. Third, unlike previous studies that assumed the distribution of secondary infected individuals as normal distribution, assuming a negative binomial distribution, the number of secondary infected individuals was sensitively changed according to the estimated parameters. Interpretation of this result shows that the number of secondary infections may vary depending on the time of decision making, the target region, and the target student group. Finally, according to the results of this analysis, a proposal was made to support education policy decisions.

방사선 조사 하이드로겔을 이용한 고농도 축사폐수 전처리 및 비료의 적용

김준영 ( Jun Young Kim ),곽희성 ( Hee Sung Kwak ),임승주 ( Seung Joo Lim ),임윤묵 ( Youn Mook Lim ),신인환 ( In Hwan Shin ),김탁현 ( Tak Hyun Kim ) 한국물환경학회 2014 한국물환경학회·대한상하수도학회 공동 춘계학술발표회 Vol.2014 No.-

자아존중감, 질병에 대한 귀인유형, 우울의 관계 : 비정신과 입원환자를 대상으로

이숙,임승주 이화여자대학교 간호과학연구소 1993 Health & Nursing Vol.5 No.-

The attributional model of depression which was proposed as an alternative model of Beck's cognitive triad and Seligman's learnded helplessness model of depression lately. It was hypothesized that, in the attributional model of depression, depressives compaired to nondepressives attribute negative life events (faliure) to internal, uncontrollable, persistent and global cause. Clinicians generally agreed that depression tends to be associated with low self-esteems. And the model of self-esteem maintenance was hypoghesized that the circular relationship of self-esteem, attrbutional style of the disease and depression. This study has attempted to identify the relationship of the self-esteem, attributinal style of the disease and depression in non-psychiatric inpatients at the EWHA hospital. Data collection was done from May 1st to August 5th, 1993, by means of questionare and interview. The instrument for this study were Rosenberg's Self -esteem scale, Zung's Self-Rating Depression scale and Attributional rating scale by Yon Kim. Analysis of data was done by use of frequency, Mean, Standard deviation, ANOVA, Pearson Correlation Coeficient. The Result of this study can be summarized as follows 1. "The lower level of self-esteem, the more internal attributional style of the disease." was accepted (r=-.124, p=.040). 2. "The lower level of self-esteem, the less controllable attributional style of the disease." was accepted (r=-.171, p=.008). 3. "The lower level of self-esteem, the more persistent, global attributinal style of the disease." was rejected (r=.004, p=.474 r=-.070, p=.162). 4. "The lower the level of self-esteem, the higer the level of depression." was accepted (r=-.254, p=.000). 5. "The more internal, uncontrollable, persistent and global attributional style of the disease, the higher the level of depression." was rejected. 6. Analysis of factors influencing self-esteem were Gender, Religion and Admission unit (p<.05). 7. Analysis of factors influencing depression were Duration of education (p<.05). 8. Analysis of factors influencing attributional style of the disease in 1) location were Duration of education, Admission unit (p<.05). 2) Control was Age(p<.05). 3) Persistency were Growth place, Duration of admission and Ⅳ state (p<.05). In conclusion, it was found that the lower level of self-esteem related to ~-the depressive attributional style, and then the internal attributional style related to the depression. A conclusion of this study is that an important nursing intervention. to help diminish depression, is to assess the level of self-esteem, attributional style of the disease and promote the self-esteem according to attributional style of the disease.