섬유상 배후내장재의 구조적 특성이 흡음성능에 미치는 영향

오경화,윤재희,Oh, Kyung-Wha,Yoon, Jae-Hee 한국섬유공학회 2005 한국섬유공학회지 Vol.42 No.6

In this study, the effects of the thickness, fiber diameter, and solidity of rear acoustic absorbents on sound absorption coefficient were investigated. Polyester $100\%$ nonwovens (needlepunching) consisting of different fiber fineness were selected for rear acoustic absorbents. The capacity of sound absorption was measured by the two-micro-phone impedence measurement tube (KS F 2814), and sound absorption coefficient was calculated. Air permeability (ASTM D 737) was measured to estimate the structural characteristics of acoustic absorbents. It was found that the amount of sound absorption by rear acoustic absorbents increased throughout the whole frequency range with increasing thickness and solidity, and with decreasing fiber diameter, which results from the reduction of air permeability. Based on the results of this study, it is expected that efficient sound absorption capacity through the whole frequency range can be achieved by applying various combination of rear acoustic absorbents to the interior of buildings.

초다공성 에어로겔 함유 섬유상 복합체의 흡음특성에 관한 연구

오경화,최해운,Oh, Kyung-Wha,Choi, Hae-Woon 한국섬유공학회 2009 한국섬유공학회지 Vol.46 No.1

Experimental results on the acoustic properties of aerogel/fiber composite materials and polyester 100% nonwovens are presented. The effects of the thickness, combination, and solidity of acoustic absorbents on the sound absorption coefficient were investigated. The capacity of sound absorption was measured by ISO 10534-1:1966. At a thickness of aerogel/fiber composite materials of 18 mm the coefficient of sound absorption reaches values of more than 70% for 630 Hz. With increasing thickness of the aerogel/fiber composite materials, the maximum value moves towards lower frequencies. The polyester 100% nonwovens exhibit high coefficient of sound absorption in the high frequency range with increasing thickness and solidity. Multilayered stacks(combinations of aerogel/fiber composite materials and polyester 100% nonwovens) can take advantage of high attenuation in both low and high frequency ranges. The experimental determination of the characteristic attenuation for each acoustic absorbent allows us to determine the acoustical characteristics of multilayered stack and could lead to an optimization of the number of layers and of the thickness of each layer for a given combination.

Effects of Silicone Softeners on the Performance of the In-Situ Polymerization and Crosslinking Treated Cotton Fabrics

오경화,Oh, Kyung-Wha The Korean Fiber Society 1996 한국섬유공학회지 Vol.33 No.9

The effects of mixed acid catalyst and silicone softeners on the in-situ polymerization and crosslinking (IPC) treatment of cotton fabrics were studied.4 mixture of magnesium chlo-ride and citric acid was used to catalyze the crosslinking reaction of cellulose with N-mothy-lolacrylamide, and the performance properties of treated fabrics were evaluated as compared with those treated with zinc nitrate, a classical DP catalyst. Three types of silicone softeners including aminofunctional polydimethylsiloxane, reactive polydimethylsiloxane of high viscosity, and hydroxy-end blocked reactive polydimethylsiloxane of low viscosity were each applied to the fabrics pre-treated with NMA by two step steam fixation process. The results indicate that the highly active mixed catalyst facilitates low temperature curing, which is beneficial when silicone sorttener is applied to NMA finished fabrics, providing better DP performance with a higher retention of mechanical properties. In conjunction with IPC treatment with NMA, silicone softeners significantly improve tear strength and abrasion resistance and wrinkle recovery angle. Thereby, 20% reduction in the amount of resin application may be achieved for satisfactory levels of DP performance when silicone softeners are used.

소비자 조사와 착의 실험을 통한 온도감응형 기능성 의류개발을 위한 기초연구

상정선 ( Jeong-seon Sang ),정경화 ( Kyunghwa Chung ),박주현 ( Juhyun Park ),오경화 ( Kyung Wha Oh ) 한국의류산업학회 2017 한국의류산업학회지 Vol.19 No.1

In this research, consumer awareness investigation and wearing test were carried out for obtaining useful data on the development of thermo-sensitive functional clothing material. A survey involved 216 people in Seoul and Kyeonggi- do, and 200 questionnaires data were analyzed by descriptive statistics and frequency using SPSS 17.0. Four healthy men in twenties were participated for wearing test. Subjects in normal loungewear were exposed to temperature change from the initial temperature 30oC down to 5oC for an hour in a climate chamber. The environmental temperature, surface temperature of garment and skin were measured. As a result, most of respondents have all season clothing products such as underwear, hosiery, and jogging suit for loungewear. Also, thermo regulator y functional clothes are frequently used as underwear and sweat shirt. The consumer awareness investigation on thermo regulatory functional clothing showed that the most important key buying factor is quick climate temperature response, easy maintenance, design and cost, in that order. Surface temperature of garment went down with the cooling down of environmental temperature. The lower environmental temperature, the greater temperature difference by body part showed. Skin temperature change by environmental temperature showed similar tendency of garment surface temperature. In comparison between garment surface and body skin, temperature difference became larger under the lower environmental temperature.

보문 : 초다공성 에어로젤 함유 섬유상 복합체를 이용한 신발 안창소재에 관한 연구

오경화 ( Kyung Wha Oh ),박순자 ( Soon Ja Park ) 한국의류학회 2009 한국의류학회지 Vol.33 No.5

사회적 지지가 청소년의 자기관리, 외모만족도 및 유행의사선도력에 미치는 영향

오경화 ( Kyung Wha Oh ),김현숙 ( Hyun Sook Kim ) 대한가정학회 2011 Human Ecology Research(HER) Vol.49 No.10

When adolescents undergo the period of transition, they need to promote self-confidence from social support by parents, teachers or friends. It was believed that boosting subjective perception on their main areas of interest such as academic performance, appearance and fashion will result in happiness. The main purpose of this study was to investigate the influence of social support including family support, teacher support and friend support on self management, appearance satisfaction and fashion opinion leadership. A total of 412 questionnaires from the middle and high school students living in or near Seoul were collected and analyzed. The results indicated that teacher support and family support had a positive effect on self-management and family support had a positive effect on appearance satisfaction. Furthermore, friend support had a positive effect on fashion opinion leadership. In conclusion, implications for promoting self-confidence related to self-management, appearance satisfaction and fashion opinion leadership with the help of social support are suggested.

지적장애학생을 위한 과학교육 관련 집단 중재연구 분석

오경화 ( Oh¸ Kyung-wha ),방명애 ( Bang¸ Myong-ye ) 한국지적장애교육학회(구 한국정신지체아교육학회) 2020 지적장애연구 Vol.22 No.4

본 연구의 목적은 지적장애학생을 위한 과학교육 관련 집단 중재연구를 분석하는 것이다. 이를 위해 2010년부터 2019년까지 국내 지적장애학생을 위한 과학교육 관련 집단 중재연구 18편의 일반적 특성(연구대상, 중재특성, 연구설계)과 중재방법 및 중재결과를 분석하고, CEC(Council for Exceptional Children, 2014)가 제안한 증거기반 중재 실제의 질적 지표에 기초하여 질적 수준을 분석하였다. 연구 결과는 다음과 같다. 첫째, 연구 대상수는 초등학생(44.4%)이 고등학생(33.3%)과 중학생(22.2%)보다 많았다. 연구환경은 특수학급(44.4%)이 특수학교(27.8%)와 통합학급(27.8%)보다 많았다. 집단중재의 연구설계 유형별로는 사전-사후검사 통제집단설계(83.3%)가 단일집단 사전-사후검사설계(11.1%)와 사후검사 통제집단설계(5.6%) 보다 많았다. 둘째, 독립변인 요소로는 STEAM(Science, Technology, Engineering, Arts, Mathematics: 과학, 기술, 공학, 인문과 예술, 수학) 중재 전략(38.9%)이 가장 많았다. 증거기반 중재 실제의 질적 지표에 기초하여 분석한 결과 사회적 타당도(27.8%)와 관찰자간 신뢰도(11.1%)가 낮게 나타났다. 셋째, 종속변인 요소로는 과학적 태도(72.7%)가 과학적 지식(61.1%)과 과학적 탐구 능력(33.3%)보다 많았다. 넷째, 특수교육 분야의 증거기반 실제를 위한 질적 지표에 따라 집단 중재연구를 분석한 결과, 중재충실도(44.4%)에 대한 질적 지표가 낮게 나타났다. 이와 같은 연구결과를 바탕으로 지적장애학생을 위한 과학교육 관련 집단 중재연구에 대한 논의를 하고, 지적장애학생의 과학교육을 위한 시사점과 후속 연구를 위한 제언을 제시하였다. The purpose of this study was to analyze group intervention studies related to science education for students with intellectual disabilities based on the quality indicators of evidence-based practices. Eighteen group intervention studies related to science education for students with intellectual disabilities published from 2010 to 2019 were analyzed using the quality indicators of evidence-based practices developed by the Council for Exceptional Children(2014). The research findings were as follows. First, the most widely selected study subjects were elementary school students with intellectual disabilities and the most widely selected research environment was a special class. A pretest-posttest control group design was more widely used than one-group pretest posttest design and posttest only control group design. Second, STEAM (Science, Technology, Engineering, Arts, Mathematics) intervention strategies were the most widely implemented as an independent variable. Third, a scientific attitude was more widely used than scientific knowledge and scientific inquiry ability as a dependent variable. Fourth, the quality indicators of evidence-based practices such as social validity, inter-observer reliability, and fidelity of intervention were not entirely fulfilled. Educational implications and suggestions for future studies were discussed.

다문화 가정 청소년의 한국문화수용성과 학교생활적응에 관한 연구

오경화 ( Kyung Wha Oh ) 대한가정학회 2011 Human Ecology Research(HER) Vol.49 No.9

The effect of an adolescent`s being in a multicultural family, including the psychological, cultural, and situational characteristics of this experience, in terms of how it impacts acceptance of Korean culture, social competence, and educational adaptation was investigated. 120 multicultural family adolescents who were enrolled in Seouland Gyeonggi-do middle and high schools were surveyed. The results were analyzed by the PASW Statistics v18 program. Firstly, it was found that the psychological, cultural, and situational characteristics of multicultural family adolescents were significantly affected by family`s general economic level and their mother`s occupation and nationality. Secondly, multicultural family adolescents with higher self-perception, good accommodation of crosscultural attitudes in Korean culture and more relationships with Koreans tended to adapt to Korean culture more easily. Thirdly, multicultural family adolescents who adapted to Korean culture more easily could also adapt to school life well, and those who had better interpersonal relations and more advanced problem-solving skills had better relationships with school friends.

폴리아닐린 / 나일론 6 복합직물의 전기 전도도 향상 연구

오경화(Kyung Wha Oh),성재환(Jae Hwan Seong),김성훈(Seong Hun Kim) 한국고분자학회 2000 폴리머 Vol.24 No.5

보문 : 글리옥살을 이용한 마직물의 무포름알데히드 방추제공 (제1보) -촉매의 영향-

오경화 ( Kyung Wha Oh ),홍경화 ( Kyung Hwa Hong ) 한국의류학회 1998 한국의류학회지 Vol.22 No.8