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3원색 분산염료를 이용한 PET 섬유의 Black 염색
김혜림,장혜경,이정진,Kim, Hae-Rim,Jang, Hae-Kyoung,Lee, Jung-Jin 한국섬유공학회 2008 한국섬유공학회지 Vol.45 No.6
In black dyeing of PET fabric, high concentrations of disperse dyes of three primary color are generally required, which leads low exhaustion level of dyes and discharge of unfixed dye into dyehouse effluent. In this study, the effect of combination ratio of dye concentration, liquor ratio, and dyeing pH on dyeing and color property of black dyed PET fabric was investigated. From the results, high K/S values and low lightness $(L^*)$ of PET fabric could be obtained with relatively small amount (1%owf) of yellow dye on condition that red and blue dye were used in high concentration. The dyeing results of red dye were consistent with those of yellow dye while blue dye did not follow the trend. Use of small amount of blue dye and large amount of yellow and red dyes resulted in PET fabric of grayish red color instead of black. Dyeing and color property of black dyed PET fabric were found to be dependent upon dyeing pH while not on liquor ratio.
DETECT를 이용한 소표본 평가 자료의 차원 구조 규명
김혜림(Hae Rim Kim) 한국교육평가학회 2006 교육평가연구 Vol.19 No.3
교육 평가 자료의 차원 구조 분석 도구 DETECT는 두 문항 사이의 조건부 공분산에 기초하여 개발되었으며, 차원이 다른 문항들의 군집 형태를 고려한다. DETECT는 자료에 존재하는 다차원성의 정도를 수치로 추정하고, 내재된 차원의 개수를 알아내며, 문항들을 차원이 같은 군집으로 묶는다. 또한 DETECT는 이분 (binary) 문향 자료는 물론 다분 (polytomously scored) 문항에도 적용되도록 확장되었다. 그러나 선행된 DETECT에 대한 연구는 대표본 자료에 국한되어 실제 평가 환경에서 만나는 비교적 작은 규모의 자료에 적용하기에 한계가 있었다. 따라서 본 연구는 소표본 자료의 차원 분석의 기준이 될 수 있는 준거를 마련하는 데 목적을 둔다. 즉, 문항수도 크지 않고 평가 학생수도 충분하지 않은 경우에 적용시킬 수 있는 기준을 탐색하고자 한다. 모의실험과 실제 자료 분석 결과 20 문항 이하의 작은 규모의 평가일 때 평가 대상 학생수가 200명 정도이면 DETECT를 이용하여 신뢰할 만한 결과를 얻을 수 있는 것으로 나타났다. 그리고 정확한 군집을 복원하는 비율도 매우 크게 나타나 DETECT의 좋은 성능을 보여준다. 또한 소표본에서도 DETECT 값에 따라 자료의 다차원 정도를 대표본의 경우와 거의 같은 기준으로 판단할 수 있음을 밝혔다. 그러나 무엇보다 DETECT만이 갖는 차별성이라면 다차원성의 정도를 수치화할 수 있다는 점일 것이다. 만일 현장에서 크고 작은 규모의 평가 자료를 다루는 경우 DETECT를 활용한다면 보다 심도있는 자료 분석이 될 것이라 판단된다. Multidimensionality detecting procedure DETECT, based on conditional covariances between items, is using item clustering distinctive dimensionally. It numerates the amount of multidimensionality in the data, finds the number of dimensions of the data, and classifies items according to their dimension. Although DETECT has been developed for the binary items, it is extended to deal with polytomous item data. Simulation study using DETECT, however, has been performed only for the large sample data, which is moderate length test with large number of examinees. It necessitates to have a benchmark for the both small number of items and small number of examinees case when we employ DETECT for the dimensionality assessment. Simulation study shows that for a test having less than 20 items 200 examinees supply enough information on obtaining reliable results. Moreover the recovery rates of correct item clusters are high. On top of other findings, it is very promising that DETECT still summarizes well degrees of lack of unidimensionality in the data. The same categories on magnitude of DETECT are useful to reveal the amount of multidimensionality as in the large sample data cases. Real data study also provides very meaningful results, making DETECT a strong dimensionality assessment tool for the test data analysis.
Environmentally Friendly Dyeing of PTT with Temporarily Solubilized Azo Diseperse Dyes
장혜경,김혜림,이정진,Jang, Hae-Kyoung,Kim, Hae-Rim,Lee, Jung-Jin The Korean Fiber Society 2008 한국섬유공학회지 Vol.45 No.4
Temporarily solubilized azo disperse dyes containing ${\beta}$-sulfatoethylsulfonyl group were applied to PTT fabric and feasibility of dispersant-free dyeing was investigated. The color yields of the dyes on PTT fabric were found to be dependent on dye bath pH while not much on dyeing temperature. The optimum results were obtained at pH 5-6 and $110^{\circ}C-120^{\circ}C$. The dyes showed good build-up properties on PTT fabric. Washfastness were fair to moderate and lightfastness were somewhat poor. The COD levels of the dyeing effluent from the temporarily solubilized disperse dye were much smaller than those from commercial disperse dyes.
박효남(Hyo-Nam Park),김혜림(Hae-Rim Kim),최성호(Seong-Ho Choi) 한국응용과학기술학회 (구.한국유화학회) 2021 한국응용과학기술학회지 Vol.38 No.6
본 연구에서는 가교제인 붕산과 아크릴 수지 바인더에 삼인산(3 인산), 피트산(6 인산) 또는 폴리인산암모늄(10 인산)을 혼합하여 인계 난연 코팅액을 제조하였다. 제조된 인계 난연 코팅액을 부직포에 각각 코팅하여 높은 난연 효과를 얻었다. 이렇게 제조된 난연성 부직포를 연기밀도기준시험(ASTM E662), 산소한계지수기준시험(ISO E622), 수직연소기준시험(UL 94)을 이용하여 평가하였다. 그들의 난연 효과는 phosphate 그룹의 수에 의해 영향을 받았으며, 천연 또는 합성 바인더 수지에 관계없이 그 효과는 ammonium polyphosphate > phytic acid > triphosphate의 순서로 나타났다. 천연 탄화수소 화합물도 바인더 수지의 난연성을 결정하기 위해 조사되었다. 그 결과 천연 탄화수소 바인더 수지가 난연성 부직포 제조에 사용될 수 있음을 보여주었다. In this study, we prepared phosphorous flame-retarding coating solutions by mixing triphosphate (3 phosphonate), phytic acid (6 phosphonate), or ammonium polyphosphate (10 phosphonate) with boric acid as a crosslinking agent and acryl resin binder. Prepared phosphorous flame-retarding coating solutions were coated onto non-woven fabrics, respectively, to obtain high flame-retarding effects. These prepared flame-retardant non-woven fabrics were evaluated using smoke density standard test (ASTM E662), limit oxygen index standard test (ISO E622), and vertical burning standard test (UL 94). Their flame-retarding effects were affected by the number of phosphonate groups. Regardless of natural or synthetic binder resins, their effects showed the following order: ammonium polyphosphate > phytic acid > triphosphate. Natural hydrocarbon compounds were also examined to determine the possible retardancy of binder resins. Results showed that natural hydrocarbon binder resins could be used for preparing fire-retardant nonwoven fabrics.
다문화가정 아동과 일반가정 아동의 구어 문장 비교 연구
김의수 ( Ui Su Kim ),김혜림 ( Hae Rim Kim ) 우리어문학회 2012 우리어문연구 Vol.42 No.-
In this paper, I compared sentences spoken by elementary school students of multi-cultural families and general families from syntactic point of view. The results from first grade students show that they have similar level of syntactic complexity and diversity. However, as the grade progresses, the gaps between the two groups become wider; that is, the score of syntactic complexity of general family children is 1.6 times higher than that of multi-cultural family children. In the fifth grade the score widens to more than 2.5 times. Lexical analysis as well as syntactic diversity shows similar patterns to the result of syntactic complexity analysis. Fifth graders from multi-cultural families have lower scores compared to first graders from general families from syntactic and lexical point of view. This indicates serious language development delays of children from multi-cultural families in elementary schools and a need to address this problem urgently.