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열처리 온도가 Poly(trimethylene terephthalate)(PTT) 섬유의 역학적 성질과 미세구조에 미치는 효과
정경희 ( Kyung Hui Jeong ),이언필 ( Eon Pil Lee ),이재호 ( Jae Ho Lee ) 한국의류산업학회 2013 한국의류산업학회지 Vol.15 No.6
Polytrimethylene terephthalate(PTT) offers several advantageous properties such as good tensile strength, uniformity, stiffness, toughness, UV stability, resilience, stain resistance, outstanding elastic recovery, and dyeability. The effects of annealing temperature on physical properties and the structure of PTT filaments and yarn were investigated by measuring wide-angle X-ray diffraction (WAXD), density, optical birefringence, dynamic visco elasticity, and tensile testing. The intensity of maximum tan δ decreased and the temperature of maximum tan δ shifted to a higher temperature as the annealing temperature of filaments increased; however, it shifted to a lower temperature when the annealing temperature exceeded 130oC. In addition, crystallinity, density and D-spacing of (010) crystal face increased as the annealing temperature increased. Optical birefringence and specific stress were almost constant up to 100oC and then decreased above 130oC. The shrinkage of PTT filament is 0 in boiling water when annealed above 130oC; consequently, the use of annealed fiber above 130oC can remove thermal instability when dyeing PTT fiber. In the case of yarns, the thermal stability and physical properties of yarns showed the best effect when the ply number is less than 5, twist number is less than 400tpm, and the annealing time is 20minutes.
마음읽기 중재가 자폐범주성장애 아동의 이야기 회상 산출에 미치는 효과
이산희(San-Hui Lee),서경희(Kyung-Hee Sehr),정한진(Han-Jin Jeong),유진(Jin Yu),이효진(Hyo-Jin Lee) 한국의료정보교육협회 2018 보건의료생명과학논문지 Vol.6 No.2
본 논문에서는 마음읽기 중재가 ASD 아동의 이야기 회상산출 능력에 미치는 효과를 알아보고자 하였다. 연구는 행동간 중다 기초선 설계로 이루어졌으며 기초선 1회기, 중재 8회기, 중재철회 1회기로 진행되었다. 연구 결과, 마음읽기 중재를 사용하였을 때 대상아동의 이야기 회상산출 능력이 증가되었다. 이를 통해 마음읽기 중재가 ASD 아동의 이야기 회상산출에 긍정적인 효과가 있음을 확인할 수 있었다. The purpose of this study was to investigate the effect of mind reading intervention on the recall of ASD children. This study was designed as a single case study (A-B-A). As a result of the study, when the mind reading intervention was used, the ability of the target child to recall the story was increased. This suggests that the mind reading intervention has a positive effect on the story recall of ASD children.