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현장 냄새의 5가지 특성 모니터링이 가능한 모바일 냄새 앱 구성 요소 개발
최호윤,김지연,윤종훈,김만구 한국냄새환경학회 2021 실내환경 및 냄새 학회지 Vol.20 No.2
The degree and intensity of unpleasant and disgusting odors perceived through a person's sense of smell can vary depending on personal or social and cultural characteristics. In addition, it is not effective to manage odors solely on the basis of concentration levels because odors can be combined according to temperature, humidity, and frequency, so that they can be recognized differently even if the same person smells the same substance. The mobile odor application was developed to enable real time monitoring of odor characteristics reflecting the actual condition of the field. Accordingly, the Green Future Foundation, a civic group, conducted an environmental campaign to record and share the information of odors in school zone using the first version of the application. The real time monitoring of field odor was able to improve the problems of the current standard methods for the examination and assessment of odors. However, with regard to the first version of the application, the process and results of odor recording through odor measurement applied the direct olfactory method and were less relevant. Therefore, it was difficult to organize data due to duplicate selection. For that reason, this study was conducted to overcome the problems of the first version of the mobile application and to effectively and accurately reflect odors and personal characteristics. This odor application that has been developed is able to monitor and assess odors based on 5 features: classification, character, strength level, hedonic tone, and acceptability.
NaBH4를 이용한 암모니아 보란 수소 저장 소재 합성 공정 개발
최호윤,박성진,정성진,백종민,송한덕,김종수,이건종,김영래 한국수소및신에너지학회 2014 한국수소 및 신에너지학회논문집 Vol.25 No.5
Ammonia borane (NH3BH3), as a source material for energy generation and hydrogen storage, hasattracted growing interest due to its high hydrogen content. We have investigated the synthesis of ammonia boranefrom sodium borohydride (NaBH4) and ammonium chloride (NH4Cl) utilizing a low-temperature process. Fromour results, we obtained a maximum synthetic yield of 98.2% of ammonia borane complex. The diammoniatediborane (DADB) was detected in about 5~10mol% with in the solid ammonia borane by solid-state 11B-NMRanalysis. The synthesized solid ammonia borane products were studied to characterize hydrogen release uponthermal dehydrogenation.
크립톤 등 레어 가스 내 불순물 정제 및 양산화 기술 개발
최승현,최호윤,김가해,김민선,서봉수,박규홍,이수출,김재창 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.1
반도체 3D NAND 공정에서 10nm미만의 기술과 Vertical 고집적화를 구현하기 위해 Kr 및 Xe과 같은 rare gas의 고순도 사용이 폭발적으로 증가하고 있다. Kr의 경우 공기 중 함유량이 1.1ppm에 불과하고, ASU플랜트를 통해서만 대기 중 포집이 가능한 탓에 가격이 높고, 반도체 공정의 지속적인 발전으로 rare gas의 가격은 더욱 더 상승하고 있는 상황이다. ASU로 포집 된 rare gas는 저순도 상태로, 반도체 공정에서 사용하기 위해선 고순도 정제가 필요하다. Crude rare gas를 반도체 공정 수준의 고순도로 높이고, 경제성을 위해 N<sub>2</sub>, O<sub>2</sub>, CO<sub>2</sub>, H<sub>2</sub>O만을 선택적으로 정제하고자 한다. Kr 기술을 바탕으로, 특성이 유사한 다른 rare gas도 같은 방법을 적용할 수 있을 것으로 기대 된다. 본 연구로 rare gas 내 불순물 정제 및 양산화하여 고순도의 결과물을 얻어내고, 수입 물질의 무기화에 대응하기 위해, 고순도 가스 정제 기술의 국산화 방법을 연구하고 제시하고자 한다. <sup>**</sup> 본 사업은 중소벤처기업부에서 지원하는 중소기업기술정보진흥원의 재원으로 수행된 2018년도 구매조건부 신제품개발사업 해외수요처 사업의 연구수행으로 인한 결과물임(S2655715).
현장 올펙토메터를 이용한 서울시 학교주변 냄새의 공기희석배수 측정
김지연,최호윤,윤종훈,김만구 한국냄새환경학회 2021 실내환경 및 냄새 학회지 Vol.20 No.2
This study investigated the odor dilution rate at 15 locations around three schools in Seoul using an onsite olfactometer. In addition, odor intensity, odor quality, and hedonic tone by direct sensory method were measured along with measurement of the field odor dilution rate, and instrument analysis using odor sensor array and TD-GC was also measured. Onsite olfactometer measurements show that only one of the three schools measured odors exceeding the strict emission acceptance standard of 10 at three points. The average odor intensity at each point measured by the direct sensory method of five persons was in the range of 2.7 to 0.3. The difference in the number of odor dilution rates around schools in Seoul could be related to the level of income by region. The odor environment around each school was judged to be well managed in areas with higher income levels, indicating a lower odor dilution rate. The correlation coeffcient between the odor intensity measured by the direct sensory method and the onsite olfactometer was 0.79, indicating high correlation. The correlation coefficient of sensor array and TD-GC toward the odor intensity was -0.28 and 0.02, respectively. This suggests that a method based on a person's sense of smell should be introduced when measuring low-level odor dilution rates in non-industrial areas, such as school zones.