The study aims to analyze the mixed characteristics of knit fashion design as demonstrated in Sacai's collection, which promotes hybrid and mesh-up fusion and proposes various knit design ideas. Standards for categorizing mixed phenomena of Sacai’s knit design were established through a review of literature and data analysis. The study’s data collection period was from 2012 to 2021, and a total of 174 items were analyzed. The following are the results. First is the fusion of traditional knit and contemporary styles expressed through de-constructive design; traditional knit styles are combined with contemporary styles through color, material, and knitting structure mixtures, such as mixing Northern European Aran, Fair Isle, Nordic, and Ropy knit. Second, the Sakai knit design combines male and female styles by mixing materials and details. A deconstructed knit cardigan was matched with androcentric pin-striped shirts worn over layered shirring skirts embellished with chiffon and lace. Third, everyday street fashion style is blended with a formal, elegant fashion style. For example, the front view has a typical everyday appearance, whereas the back view contains florid and decorated details. The style is expressed as a 360-degrees appellation, with one thing in the front and another in the back. Sacai’s distinctive expressional characteristics include a mixed and de-constructive style characterized by unexpected design.

A two-phase flow in mini-channels is consist with various flow regimes (such as bubble slug, annular, churn flow) according to gas and liquid phase flow rates. A previous researches revealed that in a case of slug flow in hydrophobic mini-channels, gas and liquid phase are perfectly separated by interfaces and triple contact line. In this study, the single dry slug flow experiments in circular mini-channel (D = 1.018 mm) are conducted to observe interfacial break-up phenomena in high capillary number range (Ca < 0.02). The slug is consist with D.I. water or D.I. water-ethanol binary mixtures (5% and 10%, mole fraction). On the base of previous researches, we calculate the pressure drop at moving triple contact line. In an addition, a single dry slug flow is visualized by using high-speed camera. Through the experiment, three regimes of pressure drop are observed; steady, loss, separation. As a result, criteria between steady and loss regimes is closely related to capillary number, and criteria between loss and separation regimes is related to surface tension.

Gasohol, which is combined solution of gasoline and ethanol, is difficult to apply to the field, because it usually brings phase separation by mingling of water. We investigated phase separation by adding different concentrations of "Ethanol", anhydrous and fermentative, to "Gasolines", gasoline, gasoline base and naphtha, Placing ethanol itself open to the air, the concentrations of water are increased in length of time. The phase separation temperatures of the gasolines-ethanol solutions have dropped in the following order : gasoline, gasoline base and naphtha. When adding water to the solutions of gasolines and anhydrous ethanol, the temperatures of phase separation is higher when the concentration of water increases more. Thus, it is obvious that the water is sensitive in phase separation.

본 연구에서는 나노기술을 이용하여 에너지 감쇄 기능을 활용한 내진용 감쇄기 개발에 대한 연구를 하였다. 구조물에 사용되는 기존의 유체 감쇄기를 대체하는 무기재료를 이용한 새로운 감쇄기에 대한 기초적 연구를 하였다. 완충역할을 하는 입자로는 미로구조를 가지는 실리카겔을 사용하였으며, 입자에 관련한 작동 유체로는 물을 사용하여 그 효과를 검증하였다. 콜로이드 감쇄기를 구현하기 위해서는 형성된 실리카 겔 입자의 표면을 유기 실리콘 매질을 이용한 소수화 코팅 처리를 하였다. 콜로이드 감쇄기의 이력곡선은 서로 다른 소수화 코팅 처리가 된 입자의 혼합과 소수화 처리시의 분자간 거리에 의해서 조절이 가능함을 알 수 있었다. 콜로이드 감쇄기의 에너지 소산양은 상이한 소수화 처리 정도와 서로 코팅처리량이 서로 다른 재료를 혼합함으로써 제어 할 수 있음을 확인하였다. 기존의 유압 감쇄기에서는 나타나지 않는 이러한 특징은 콜로이드 감쇄기가 충격 흡수 장치로 사용 가능하다는 사실을 입증한다.

We carried out this subject to observe photoisomerization using 1,2-dioleoyl-sn- glycero-3-phosphocholine(DOPC) mixed with fatty acid containing azobenzene group which has reversible to cis-trans by light irradiation. Spreading solutions for the LB films were prepared in chloroform(5.0×10-5mol/L).We investigated the photoisomerization and property of the organic ultra thin film of fatty acid containing azobenzene was prepared on the hydrophilic ITO(idium tin oxide) glass plate by LB method. As a result, the absorption spectra of 8A5H and DOPC of mixture LB films was induced to photoisomerization by alternating irradiation of ultraviolet and visible light, because the condensation of pure azobenzene monolayers was loosened by the introduction of phospholipid into the monolayers, and the molecular high aggregation in pure azobenzene monolayers is also weakened by the introduction of phospholipid. We found that it was reversibly induced to cis-trans photoisomerization in several solvents and mixture LB films.

증기투과를 이용한 휘발성유기물(volatile organic compounds, VOCs)/N2 혼합물의 분리에서 농도분극현상이 투과거동에 미치는 영향을 연구하였다. 막 재료는 VOCs와 친화력이 큰 poly(dimethylsiloxane)(PDMS) 막을 사용하였으며, VOCs는 염소화탄화수소류 중에 탄소수와 치환된 염소수를 고려하여 CH2Cl2, CHCl3, C2H4Cl2, C2H3Cl3 를 사용하였다. Feed의 유속, 투과온도, VOCs의 농도 등의 변화에 따른 투과거동의 변화를 관찰하였다. 유속이 감소함에 따라 막의 투과분리성능의 감소가 관찰되었으며, 응축성이 큰 VOCs일수록, VOCs의 농도가 높을수록 또는 투과 온도가 낮을수록 감소 폭이 큰 경향을 보였다. 이와 같은 투과거동의 변화는 농도분극현상에 의한 것으로, 유속이 감소함에 따라 경계층 내의 물질전달계수가 감소하여 농도분극현상이 증가하기 때문에 나타나는 투과거동의 변화로 해석하였다. 결과적으로 VOCs/기체 혼합물의 증기투과를 통한 분리 시 농도분극현상이 크지 않을 것이라는 일반적인 생각과는 달리 고무상 막을 통한 증기투과에서는 농도분극현상에 의한 막 성능의 감소가 크게 나타났다.

We carried out this subject to observe photoisomerization using 8A5H and phospholipid(DLPC) containing azobenzene group which has reversible to cis-trans by light irradiation. We investigated the photoisomerization and property of the monolayer film on quartz substrate prepared by the mixture of 8A5H and phospholipid deposited using Langmuir-Blodgett(LB) method. It was found that the absorption spectrum of the 8A5H and phospholipid LB monolayer was induced to photoisomerization by alternate light irradiation. And the absorbance of both the solution of mixtures of 8A5H-phospholipid and LB film was reversibly changed by the acid-base exposure and alternate temperatures.