Poly(ether ether ketone)(PEEK)를 황산을 사용하여 설폰화시킨 후 폴리설폰과 다양한 조성으로 혼합하여 블렌드 고분자 전해질 막을 제조하였고 조성의 변화에 따른 메탄을 투과도, 수소이온전도도, 그리고 이온교환용량의 변화를 측정하였다. 폴리설폰의 경우 이온전도도는 낮은 반면에 메탄올에 대한 저항은 우수하였다. 그러나, 설폰화된 PEEK의 양이 증가함에 따라 메탄을 투과도와 수소이온전도도가 함께 증가하였다. 이온전도도와 메탄을 투과도의 비로부터 폴리설폰의 양이 20%일 때 가장 좋은 선택성을 가지는 것을 알 수 있었다.

Durable softening water-repellenting agent such as PODCW, PDDCW and PEDCW were prepared by blending cationized compound such as poly(octadecyl methacrylate-co-2-diethylaminoethyl methacrylate)[PODC], poly(2-dodecyl methacrylate-co-2-diethyl-aminoethyl methacrylate)[PDDC] and poly(2-ethylhexyl methacrylate-co-2-diethyl-aminoethyl methacrylate)[PEDC], and cationized compound of fatty carbamide, of which synthetic methods were reported in the previous paper, waxes, and emulsifiers. The results of physical tests of the P/C blended fabrics treated with PODCW, PDDCW and PEDCW with and without textile finishing resin, showed a remarkable improvement of the physical properties. The prepared water-repellenting agents, PODCW-6 and PDDCW-1, were treated on P/C blended fabrics with and without resin. For any cases, there are a little changes between initial water repellency and repellency after 3 times washing of the fabrics. Therefore, the water-repellenting agents proved to be a durable agents, and initial water 100+ and 90+ point, respectively.

To prepare a durable softening water repellent, quaternized octadecyl methacrylate-2-diethyl-aminoethyl methacrylate as a mother resin and quaternized 1, 3-dioctadecyl-2, 7-dioxy-6, 8-di(2-hydroxyethyl)-1, 3, 6, 8-tetraazacyclodecane which increase the softening effect and the hydrostatic pressure blended with waxes and their emulsifier in various proportions to give water repellent PADWC. As the results of the measurement of water repellency, washable, tear strength and crease recovery to polyestercotton(P/C) blended fabrics treated with PADWC only or addition of textile finishing resin, the physical properties were increased. There was no significant lowering effect in water repellency when PADWC was treated the antistatic agent by the one-bath method, and the effect of water repellency by the adding the catalyst was studied. PADWC was confirmed as durable water repellent with the results of making little difference of water repellency as ±5 point after and before washing.

The blended oil was prepared from cottonseed oil and palm olien. The oxidative stability of blended oil after the addition of natural tocopherol and soybean lecithin during heating was investigated and the effects of lecithin were evaluated. The result obtained were as follows: 1. When the concentration of palm olein in blended oil during heating was increased, the oxidative stability was improved. 2. By both addition of natural tocopherol and soybean lecithin during heating in blended oil, induction period was considerably increased and residual ratio of tocopherol was high. 3. The oxidative stability of potato chips prepared from blended oil was higher in the prsence of lecithin than in the absence of it.

In order to understand and explain the spary combustion, it was necessary to understand the disintegration mechanisms of liquid jet. To understand the disintegration mechanisms of liquid jet, the disintegration phenomena and uniform droplet production regions of testing liquid jet was investigated by means of longitudinally vibration capillary nozzle, which was injected the testing liquids. The testing liquids were light oil and light oil and light oil blended with 25wt% fish oil (File fish oil, Sardine fish oil, Alaska pollac oil) The results can be summarized as follows: 1. The uniform droplet phenomena have been changed according to the frequency of capillary tube, the jet velocity and physical properties of testing oils. 2. Within the region of uniform droplet, Reynold number was increased as Weber number increases. 3. The lower limit of wave length in which uniform droplet was produced 0.8d which was lower than Rayleigh wave length 4. The light oil blended with file fish oil which has lower viscosity and surface tension had the widest uniform droplet production region on the frequency and velocity among testing oils. But light oil blended with sardine fish oil were similar with light oil in the uniform production region.

In the preparation of acrylic water repellent(EDLWC). quaternized 2-diethylarrunoethylmethacrylate-stearylmethacrylate copolymer (DSACC) and quaternized 1-Iaurovlbis(aminoethyl)-2-dodecylimidazoline(LDDIC) were selected as a basic resin and the improving agent such as softening effect and hydrostatic pressure of the water repellent. EDLWC was prepared by blending waxes and emulsifier for waxes with various ratio to DSACC and LDDIC. As the results of the measurement of water repellency, washable, tear strength and crease recovery to polyester-cotton(P/C) blended fabrics treated with EDLWC only or addition of textile finishing resin, the physical properties were increased. Sodium acetate was the most effective catalyst in the water repellency among the various kinds of catalyst. and the reasonable concentration of the catalyst was 1. 4 wt%. EDLWC was confirmed as durable water repellent with the results of making little difference of water repellency as ±5 point after and before washing. The reaction mechanism between P/C blended fabrics and EDLWC in the presence of catalyst was proposed. And also, the longitudinal view of the P/C blended fabrics treated with water repellent was observed with scanning electron microscope.

The storage stability of Instant Ramyon by industrially prepared with palm, beef tallow and blended rapeseed oils for frying oil was studied. The products was stored under fluorescent light at 60℃ with illumination of 9,000 lux. Changes of peroxide value, total carbonyl value, and absorbance at 232 nm of lipids extracted from Ramyon were investigated during storage. The storage stability of Ramyon prepared with oils containing TBHQ had better than that prepared with a mixture of BHA and BHT. The Ramyon prepared with 4 part of rapeseed oil to 6 part of tallow containing 0.02% BHA/BHT showed higher storage stability than that prepared with palm oil alone but showed lower stability than that prepared with tallow alone both under the same condition of antioxidant treatment.

A preliminary investigation was performed to evaluate the possibility of partially replacing palm oil and beef tallow by rapeseed oil for frying oils of instant Ramyon manufacturing. The AOM stability of rapeseed oil was inferior than of palm oil, but was comparable to that of beef tallow. When rapeseed oil was blended with palm oil or beef tallow, the AOM stability of the blended oil was improved. As far as AOM stability is concerned, best results were obtained with a blending ratio of 3 part of rapeseed oil to 7 part of palm oil and a ratio of 4 part of rapeseed oil to 6 part of beef tallow. These blended rapesee oils was retarded the formation of conjugated dienes and polymers during heating. The antioxidative effects on the stabilities of AOM and thermal in blended rapeseed oils showed that TBHQ was superior to tocopherols and a mixture of BHA and BHT was inferior.

국산 소형어선용 예연소실식 디이젤기관에 혼합연료유(정유+중유)를 사용할 경우 혼합연료유의 성질, 연소특성 및 기관성능에 관하여 실험한 결과를 요약하면 다음과 같다. 1) 혼합연료유의 혼합비율(중량비율)이 증가함에 따라 비중은 선형적으로 증가하였고, 점도-온도 곡선은 Walther-ASTM 식과 일치하였으며, 착화성지수인 CCAI의 값은 기울기 1.0에 가까운 직선으로 증가하였다. 2) 동일운전조건에서 착화지연은 CCAI의 값이 810(혼합비율 60%)까지는 미소하게 증가하였으나, 그 이상의 값에서는 현저하게 증가하였다. 따라서, 혼합연료유의 착화성을 나타내는 CCAI의 값은 810 이상에서 적용하는 것이 타당하다. 3) 연소최고압력은 혼합비율 40%까지 증가하다가 감소하였으며, 그을음농도는 60%부터 현저하게 증가하였으므로, 본 실험에서 무그을음 연료비절감의 안전운전 혼합비율은 50%가 적당하다

】본 연구는 혼합형 학습 환경에서 하브루타를 활용한 한국어 수업 모형을 제시하고 이를 적용한 교수 학습 방안을 모색하는데 그 목적이 있다. 하브루타 이론을 토대로 학문 목적 유학생을 위한 ‘논쟁 중심 하브루 타 수업’을 모형을 설계하고 온라인-오프라인 학습 환경에서 수업을 적용 하였다. 학습자의 인터뷰를 통해 ’의사소통 말하기 능력 향상‘, ’사고력 확 장‘, ’자기 주도적 학습‘, ’활발한 상호작용‘ 효과를 확인할 수 있었다. 학문 목적 한국어 학습자를 위한 하브루타 수업 모형을 제시하여 혼합형 학습 환경에서 활발한 상호작용을 유도할 수 있는 수업 모형을 제시했다는 점에 서 의의가 있다.

With the rapid development of society and the wide application of information network technology, we have entered the era of new media, and more and more schools have opened the course of "New Media Marketing", trying to better fit the new media with the marketing profession in order to meet the needs of a diversified society and cultivate high-quality talents. This article lists the teaching examples of online plus offline plus practice during the COVID-19 epidemic, and examines the current situation, the main problems faced and the solutions of the blended teaching practice of the New Media Marketing Course in the context of the actual situation of university teaching.

이 연구는 코로나19로 인해 급속히 도입된 온라인 수업을 경험한 교사를 대상으로 향후 초‧중등 교육에 미래 교육 방법으로 안착될 블렌디드 러닝에서 요구되는 교사 역량을 탐색하고, 전통적인 대면 수업에서 블렌디드 러닝으로의 전환을 위해 필요한 제도적 지원에 대한 요구를 탐색하고자 하였다. 이를 위해 두 차례의 설문 조사(개방형, 척도형), 문헌 조사, 해외 사례 조사를 실시하였다. 문헌 및 설문 조사 결과, 블렌디드 러닝을 위해 교사는 교육과정에 대한 이해와 재구성 역량, 디지털 리터러시 역량과 테크놀로지를 수업에 의미 있게 통합하고 활용하는 역량, 온라인 수업 시 활동 데이터를 통해 학생을 진단하고 모니터링 하는 역량, 온‧오프라인 수업에서의 학습활동 정보를 활 용한 학생별 맞춤형 지도‧지원 역량 등이 필요한 것으로 나타났다. 이와 더불어 해외 사례의 시사점과 문헌 조사, 그리고 설문 조사 결과를 통해 블렌디드 러닝으로의 전환을 위해 요구되는 정책적 지원 방안으로 교사의 새로운 역할 수행과 전문성 개발을 위한 교사 역량 제고, 교사의 온라인 수업 지원을 위한 학교와 교육청 수준의 물적‧인적 인프라 구축, 취약 계층 가정의 온라인 교육 격차 해소를 위한 단계적 지원 체제 구축, 블렌디드 러닝 방식을 적용한 수업 및 평가 전략 수립을 제안 하였다.