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이병국,맹광호,이광묵 최신의학사 1975 最新醫學 Vol.18 No.2
An Environmental and santiary survey was carried out on 585 houses and 36 wells in Gunseo Area, Okcheon-Gun, Choongbook Province. As a survey on sanitary environments of houses, number of rooms they were using, artificial lightening method, house heating method and sanitary measures in the kitchen were checked. Sanitary environments of drinking water sources were also investigated. Other tested items with water samples were hardness, pH, and chloride ion, and the results were summarized as follows: 1. 38.1 % of all subjected households were using 2 rooms and 29.4%, 3 rooms. 97.0% of all households were lightening their houses with oil lantern and those who were using elec tric lights were 1.7%. Those who were using coal briquett for their house heating were 12 households (2.0%). 7.4% of all households did not have any cupboard in their kitchens and those who were using dry wiping cloth were only 30.3% among all subjected housholds. 2. Main drinking water source was well (78.3%) and the pump was next (15.0%). 33.3% of all drinking water sources were beeing used by more than 6 househods. 96.1% of all drinking sourees (except pumps) were not covered and the drainage was bad in 30.0% of all drinking sources. 3. 47.0% of all households were disposing sewage unsanitarily and most of the rubbishes (93.2%) were beeing used for a compost. 4. 1% of the households were throw them away around their houses. Excrements were beeing used for fertilizer among 97.9% of all households. 4. The average hardness of 36 sampled well water was 188 ppm and the hardness of 7 samples(19.5 %) were over 300 ppm. 5. The average pH of 36 well surveyed were 6.48. Two samples were below 5.5 and 4 were over 7.1. 6. The average chloride ion of all samples were 75.2 ppm. The chloide ion of 4 samples were over 150 pPm, the international standard for drinking water.
에어로졸 데포지션에 의한 이트리아 필름의 미세구조와 특성
이병국,박동수,윤운하,류정호,한병동,최종진,Lee, Byung-Kuk,Park, Dong-Soo,Yoon, Woon-Ha,Ryu, Jung-Ho,Hahn, Byung-Dong,Choi, Jong-Jin 한국세라믹학회 2009 한국세라믹학회지 Vol.46 No.5
Dense crack-free yttria film with 10 $\mu m$ thickness was prepared on aluminum by aerosol deposition. X-ray diffraction pattern on the film showed that it contained the same crystalline phase as the raw powder. Transmission electron microscopy revealed a nanostructured yttria film with grains smaller than 100 nm. Tensile adhesion strength between the film and aluminum substrate was 57.8 $\pm$ 6.3MPa. According to the etching test with $CF_4-O_2$ plasma, the etching rate of the yttria film was 1/100 that of quartz, 1/10 that of sintered alumina and comparable to that of sintered yttria.
이병국 미래융합통섭학회 2022 현대사회와 안전문화 Vol.5 No.3
연구목적 본 연구는 4차 산업혁명시대 리츠 동향분석을 통해 활성화 방안을 도출하는데 주된 목적이 있다. 연구방법 이 연구는 2021년 3월 1일~ 5월 31일까지 금융기관에 근무하는 금융전문가 12인을 중심으로 심층면접 및 콘텐츠분석을 통해 이루어졌다. 분석된 결과는 텍스트마이닝 분석을 통해 데이터 시각화 하였다. 결과 본 연구의 결과는 다음과 같다. 첫째, 리츠투자에 대한 전망은 은퇴세대의 투자수요, 안정적인 배당선호, 투자활성화 정책으로 밝은 전망이 도출되었다. 둘째, 4차 산업혁명시대 유망 리츠분야로는 4차 산업혁명 인프라 투자(데이터센터, 물류센터, 통신인프라)가 도출되었다. 셋째, 4차 산업혁명 리츠 투자시 최우선 고려사항은 기초자산, 안정적인 배당, 매각차익 및 배분문제가 도출되었다. 넷째, 4차 산업혁명 리츠 투자활성화를 위한 국가정책으로는 세제혜택, 후순위채 인수가 도출되었다. 결론 세제지원 등 정부의 활성화 정책, 투자자들의 리츠자산 이해도 증진, 자본시장의 발전을 통해 4차 산업혁명 리츠를 활성화할 수 있다.