Triglyceride의 洗滌性에 關한 硏究 : 基質의 影響 Correlating the substrates

鄭惠嫄 한국의류학회 1984 한국의류학회지 Vol.8 No.1

The effects of Temperature on the removal of triglyceride were studied with soaps having various chain lengths of alkyl group. Cellophane, polyester film and alkali-treated polyester film were soiled with tripalmitin, tagged with C^14, and detergency was evaluated by analysing the tripalmitine on the fabric before and after washing by means of liquid scintillation counting. The results were as following: 1) Triglyceride was completely removed from cellophane in distilled water without surfactant at any temperature, because of the hydrophillic nature of cellulose. The detergency of triglyceride from polyester film fully depended on the state of tripalmitin. The detergency of alkali treated polyester film was better than that of untreated polyester film at lower temperature due to increased hydrophilicity, but worse at higher temperature due to the diffusion of molten tripalmitin into the grooves, formed by alkali treatment. 2) The detergency from polyester film was increased with elevating temperature and after reaching some optimum detergencies, the detergencies were rather decreased with increasing temperature. The temperatures of optimum detergency were shifted to higher with increasing chain length of alkyl group. 3) When the soiled film was baked at 60℃ and 70℃ for 20 min, the detergency vs. temperature was much the same as the case of without-baking. These results indicate that the detergency of triglyceride was largely correlated with the suspending power of surfactants at low temperature and with state of soil and hydrophilicity of substrates with elevating temperature.

[연극(3)] 반항과 탈출의 두 연극

정혜원 현대미학사 2002 공연과 리뷰 Vol.38 No.-

[연극(2)] 도발적인 내용, 도발적인 실험

정혜원 현대미학사 2003 공연과 리뷰 Vol.43 No.-

비순수 위계적 자료 분석을 위한 교차분류 다층모형과 다중소속 다층모형의 비교

정혜원 한국교육평가학회 2017 교육평가연구 Vol.30 No.4

This simulation study was designed to compare the cross-classified versus multiple membership multilevel models to properly model non-pure hierarchical data. More specifically the simulated conditions were considered as follows: intraclass correlation (0.15, 0.25), non-pure hierarchical data rate (20%, 40%), level-two sample size (30, 50, 100) and level-one sample size (10, 30, 50). Differences were investigated in regard to the relative biases of parameter estimates and correct identified rates using model fit between cross-classified versus multiple membership multilevel models under the variety of manipulated conditions. The results supported the selection of multiple membership multilevel model over cross-classified multilevel model to handle non-pure hierarchical data in the conditions with higher intraclass correlation, higher non-pure hierarchical data rate, and larger number of level-two and level-one sample size. 본 모의실험연구는 비순수 위계적 자료를 적절하게 반영할 수 있도록 개발된 교차분류 다층모형과 다중소속 다층모형을 소개하고, 두 모형을 비교하기 위해 수행되었다. 구체적으로, 본 연구는 급내상관계수(0.15, 0.25), 비순수 위계적 자료 비율(20%, 40%), 2-수준 표본수 (30, 50, 100)와 1-수준 표본수(10, 30, 50)의 조건들을 고려한 모의자료를 생성하여 교차분류 다층모형과 다중소속 다층모형을 적용하였을 경우 모수추정치의 상대편의성과 모형적합도를 이용한 적합선택비율을 비교하였다. 모의실험결과 급내상관계수, 비순수 위계적 자료 비율, 1-수준과 2-수준 표본수가 클수록 교차분류 다층모형보다 다중소속 다층모형을 선택하여 적용하는 것이 더 적합한 것으로 나타났다.

[연극(3)] ‘경계’에서 행해진 창조와 실험의 연극들

정혜원 현대미학사 2002 공연과 리뷰 Vol.39 No.-

경찰병원에 이명, 난청을 주소로 내원한 현역 경찰관의 청각학적 고찰

정혜원,주준범,조주은,김종양 대한이비인후과학회 부산,울산,경남 지부회 2012 임상이비인후과 Vol.23 No.1

There is a lack of data about police officers’s hearing thresholds in Korea. We evaluate audiometric study in police officers who visit national police hospital to complain of tinnitus or hearing disturbance. Materials and Methods:We undertook a retrospective study using review of medical records. We divided 3 groups to age (I : 31-40, II : 41-50, III : 51-59), determined the thresholds of hearing according to frequency and site in each group. Results:The hearing was significantly worse in left side than right side at 6 kHz in group III (p<0.05). All groups showed the hearing threshold was below 30 dB at 125 Hz, 250 Hz, 500 Hz, 1k Hz, 2k Hz, and above 35 dB at 4, 6, 8 kHz at both side. The hearing threshold was increasing according to age. The hearing threshold was significantly worse at all the frequencies in group III than group I (p<0.05). Conclusion:Police officers who visit national police hospital to complain of tinnitus or hearing disturbance had both high frequencies hearing loss and tinnitus. Hearing loss was worse according to age-related acoustic trauma. Further research and prevention of hearing loss should be needed. 이명과 난청을 주소로 내원한 현역 경찰관들은 양측고주파수 영역의 난청과 이명을 가지고 있으며, 청력 역치는 나이가 들수록 증가하였다. 난청과 이명의 주요 원인일 수 있는 음향외상에 대한 예방과 연구가 필요하다.

선교 목적 한국어 교재개발과 이주민 선교의 적용: 『세계관 한글공부』의 외국인 유학생 전도 활용을 중심으로

정혜원 한국선교신학회 2020 선교신학 Vol.57 No.-

오늘날 해외 선교지와 국내 이주민 선교 현장에서 한국어 학습자가 급격하게 증가하고 있다. 이주민 선교는 유형별로 선교전략을 달리하여 접근해야 한다. 국내 외국인 유학생들은 초기 정착과정에서 한국어 공부에 대한 필요가 크다. 한국어 공부는 선교의 좋은 접촉점이 되지만 큰 수요에 비해 선교를 위한 한국어 교재개발과 공급이 매우 절실한 상황이다. 선교목적 한국어 교재개발은 학습자인 외국인 유학생, 한국 인 교사, 성경과 일반 내용을 융합한 텍스트와 유학생들의 삶과 학업 현장의 상황을 고려해야 한다. 이를 토대로 한국의 유학생 전도용 한국어 공부 교재로 개발한 본 연구자의 졸고 『세계관 한글공부』 교재를 분석했다. 한국 유학생인 학습자 상황, 세계관 연구방법과 한국어 교육을 접목한 특징, 내용과 구성을 중심으로 교재를 분석하고, 유학생 선교현장에서 교재를 활용한 선교적 적용 및 활용 방안을 제시하였다. Today, the number of Korean language learners is increasing rapidly. Migrant mission should be approached differently depending on the type of migrants. Since there is a great need for studying Korean language in the early settlement process of foreign students in Korea, studying Korean language is a good point of contact for mission. However, compared to the high demand, there is no supplement of Korean textbooks for mission purpose. Korean language textbook development for mission purpose should consider foreign students as learners, Korean teachers, text of biblical and general contents, and the context of foreign students. Based on this, I analyzed 『Learning Korean with worldviews』 as Korean language textbook for evangelism and present an evangelism plan by using it for foreign students.

효소세제에 첨가한 과탄산나트륨이 세척효과에 미치는 영향

정혜원,유지혜,방종호 한국의류학회 2002 한국의류학회지 Vol.26 No.7

Changes in laundering habits and the efficacy claims made for oxygen bleach added to detergents necessitate a deeper investigation into the testing of the washing efficacy of detergents and washing process. The effect of the addition of a sodium percarbonate and bleach activator TAED to an enzyme containing detergent on the soil removal and antimicrobial properties were investigated with the measuring of residual H_2O_2. The addition of sodium percarbonates to enzyme containing detergent lowered the soil removal of EMPA 116 cloth. But sodium percarbonates had greater effects on that of colored stained cloths such as EMPA 115 and artificially soiled with wine and red pepper while they were presoaked at 20℃ or higher for 30 minutes or longer. Most of hydrogen peroxide was remained after washing. Over 99.9% of Staphylococcus aureus on the cotton cloth was removed in every washing solutions, but the cloth washed with eazyme containing detergent or detegent with oxygen bleach didn't show the antimicrobial property.

A Comparison of Three Bayesian Point Estimates for Cross-Classified Multiple Membership Growth Curve Modeling

정혜원,전현정,박소영 한국교육학회 2021 敎育學硏究 Vol.59 No.7

This simulation study evaluated parameter recovery in cross-classified multiple membership growth curve modeling under a variety of manipulated conditions, including prior distributions (inverse Wishart and uniform distributions), number of measurement occasions (3, 5), number of groups (30, 50, 100), average group size (20, 40), and non-pure hierarchical data rates (20%, 40%). Three Bayesian point estimates were compared: the posterior mean, the posterior median, and the posterior mode. With the inverse Wishart prior, the posterior mean estimates for the between-school variances in the intercept and slope were substantially overestimated with 50 groups or less, while the posterior mode estimates were substantially underestimated. The posterior median estimates were substantially biased with 30 groups or less. With the uniform prior, the posterior mean, posterior median, and posterior mode estimates of the between-school variances in the intercept and slope were substantially overestimated. In general, with the inverse Wishart prior, the Markov chain Monte Carlo (MCMC) posterior median is recommended for cross-classified multiple membership growth curve modeling, except under certain conditions. With the uniform prior, the MCMC mode is recommended for estimating cross-classified multiple membership growth curve modeling rather than the MCMC posterior mean or posterior median.

친수화처리 PET 직물에서 지용성오염의 제거

정혜원,S. Kay Obendorf 한국의류학회 1992 한국의류학회지 Vol.16 No.1

The influences of hydrophilic treatment of the PET fabric on soiling and detergency of triolein were studied. The amounts of residual triolein were determined by radiotracer analysis, and distributions of the unsaturated oils on the fabric were evaluated by backscattered electron images. The removal of triolein was increased when the PET fabrics were treated. SRP pretreatment was more effective on the oily soil removal than the of addition of SRP in the detergent. The oily soil of triolein only was packed between the fibers, but mixed soil was distributed around the fibers. When the mixed soil was used, detergent solution could penetrate the continuous interfiber capillaries, this would be one of the reasons that mixed soil was removed more extensively.