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유용진(Yoo, Yong-Jin),이상수(Lee, Sang-Soo),송하영(Song, Ha-Young) 대한건축학회 2014 大韓建築學會論文集 : 構造系 Vol.30 No.5
Recently, the enviroment problem is serious due to the global warming phenomenon because of the greenhouse gas exhaustion. And it is the situation where the severity of the destruction of environment because of the indiscriminate picking of the,that is the raw material of the cement, limestone and aggregate and exhaustion of resource are emphasized. In addition, thus the cement reduction amount of use and substitute material research is the urgent actual condition with the gas emission, which here it is generated in conducting compression molding in the building stone manufacturing process performance degradation phenomenon and fire resistance, and problem of the durability. The ratio of the waste resources (the waste glass and waste porcelain) about the total volume select as 50, 60, 70, 80 (%) etc. and try to look into the characteristic of the artificial stone according to it at this research. and the subject for examination according to it is the flexural strength, compressive strength, specific gravity (density), water absorption, rate of aggergate on the surface etc. It was considered in the exterior material standard criteria to be reasonable. And. It was exposed to be the most superior in case of the waste Porcelain mixing ratio 70%, waste glass mixing ratio 70%, and waste glass + waste Porcelain 80%.
라만 분광법을 이용한 지질생산 미세조류 Scenedesmus obliquus 성장 평가
유용진(Yong Jin Yoo),이건우(Geon Woo Lee),백동현(Dong Hyun Baek),김진우(Jin-Woo Kim),김호섭(Ho Seob Kim) 한국산학기술학회 2020 한국산학기술학회논문지 Vol.21 No.5
최근 3세대 바이오매스라고 알려진 미세조류를 이용하여 생산되는 바이오디젤은 기존의 교통수단에 사용되는 화석연료를 대체할 수 있는 유일한 재생에너지로 알려져 있다. 미세조류 중에서도 Scenedesmus obliquus 는 다른 미세조류 대비 성장이 빠르고 건조세포무게 대비 지질을 40-50 % 축적이 가능하여 바이오디젤 생산에 있어 야외 및 대규모 재배에 적합한 지질생산 우수 종으로 알려져 있다. 미세조류를 이용한 바이오디젤 생산을 위해서는 높은 바이오매스 생산량 확보가 선행되어야 하며 배양공정의 제어를 위해 효과적인 세포 질량 측정 및 분석이 필요하다. 본 연구는 S. obliquus 를 75일 동안 배양하며 흡광도, 현미경 이미지, 라만 분광법 등으로 미세조류의 성장 변화를 측정하고, 측정된 값들에 대한 상관관계를 관찰하였다. 배양 60일과 배양 75일 기간에, 흡광도의 변화량이 3 % 미만인 반면, 현미경으로 관찰한 미세조류의 숫자는 3배 이상 증가하였다. 또한, 라만 분광법으로 측정된 결과에서는 β-카로틴에 해당하는 997 cm<SUP>-1</SUP>, 1148 cm<SUP>-1</SUP>, 1515 cm<SUP>-1</SUP>의 강한 피크값이 측정되었으며, 배양 기간 동안 β-카로틴의 피크값은 초기보다 3배 이상 증가하는 것이 관찰되었다. 따라서 라만 분광법을 이용하면 미세조류 배양에서 세포 내 성장 물질과 성장 정도를 알아내어 높은 바이오매스를 생산할 수 있을 것이다. Biodiesel produced using microorganisms, which are recognized as the third-generation biomass, is among the various known renewable energy sources that can replace fossil fuels used in conventional transportation. Scenedesmus obliquus has been identified as an excellent species for biodiesel production, as it grows faster and can accumulate up to 40-50 percent of the dry cell weight. Enhancing production using S. obliquus requires measuring the cell mass for controlling the cultivation process. In the current study, S. obliquus was cultured for 75 days, and growth changes of the microalgae were measured by absorbance, microscopic imaging, and Raman spectroscopy. Between days 60 to 75 of culture, the change in absorbance was observed to be less than 3%, whereas the number of microalgae observed microscopically was more than three times higher. Moreover, the Raman spectroscopy results showed three strong peak values of β-carotene at 997 cm<SUP>-1</SUP>, 1148 cm<SUP>-1</SUP>, and 1515 cm<SUP>-1</SUP>, with peak values of β-carotene showing greater than 3-fold increase during the culture period. Therefore, we predict that application of Raman spectroscopy will help in identifying the growth elements and growth degree in microalgae culture during increased biomass production.
라돈가스 저감을 위한 흡착재를 사용한 친환경 모르타르의 특성
오서명(O, Seo-Myeong),유용진(Yoo, Yong-Jin),이상수(Lee, Sang-Soo) 대한건축학회 2015 大韓建築學會論文集 : 構造系 Vol.31 No.7
The radon is the element of the radioactive series as the environmental pollutant existing everywhere with the nature and living space. In case of the radon more than the medical standard was drunk with the gaseous substance naturally generated in the space in which the person lives or breathing by causing the respiratory disease, including the fatal lung cancer, it is known. As to the Radon gas, is reported and that great deal of radon is mainly emitted to the room from the soil, subsurface water, and construction material particularly the what is relatively high thing including the granite gypsum board, yellow soil, and etc. is generated. In addition, it showed that concentration of the Radon gas was high in the house built with the concrete and the concentration which is higher in the house in which the mortar is used as the outer wall finish was detected and the construction material choice became the important factor reducing the Radon gas generation. By applying the adsorbent in which the adsorption performance and purification performance is excellent to the moat tar, this research tries to study the application plan of the environment-friendly mortar in order to reduce the problem including the inner climate polution, harmful material and Radon gas exhaustion, and etc.
감정표현불능증(Alexithymia), 신체적 호소, 정서 및 어휘의 관계
전현태,이귀행,김재현,김한주,유용진,소광,Jeon, Hyun-Tae,Lee, Kuy-Haeng,Kim, Jae-Hyun,Kim, Han-Joo,Yoo, Yong-Jin,So, Kwang 한국정신신체의학회 2000 정신신체의학 Vol.8 No.1
Objectives : This study aimed to examine a correlation between the somatic complaints, emotion, vocabulary and alexithymia as a component of personality in normal persons. Methods : 204 subjects were collected by age-based systematic sampling from the 662 persons without confirmed medical illness. We used the Korean version of 20-item Toronto Alexithymia Scale(TAS-20K) to measure alexithymia. The somatic complaints were checked by the list of somatic symptoms on the diagnostic criteria of somatization disorder and major depressive episode in DSM-IV. The vocabulary was evaluated by the total number of associating-words from the spontaneous association of word and the secondary association to given words. The anxiety and depression were evaluated using 5-point self-report scale. Results : 1) The degree of alexithymia was significantly correlated with the somatic complaints, anxiety, depression. 2) The somatic complaints were significantly correlated with the anxiety and depression. 3) The number of associating-words showed negative correlation with the age. 4) The degree of alexithymia was not correlated with the number of associating-words. Conclusion : The more degree of alexithymia increased, the more somatic complaints appeared. There was a significant correlation between the degree of alexithymia, anxiety and depression. But the degree of alexithymia was not correlated with the amount of vocabulary. 연구목적 : 본 연구는 정상 성인에서 성격의 일반적인 특정으로서의 감정표현불능증과 신체적 호소, 정서상태 및 어휘와의 상관관계를 알아봄으로써 감정표현불능증에 대한 이해를 넓히고자 하였다. 방법 : 신체적 질환을 가지고 있지 않은 정상 성인에서 한국판 20항목 Toronto 감정표현불능증 척도(TAS-20K), 신체적 호소, 연상한 단어의 수, 우울과 불안을 정도를 측정하여 그 결과들간의 상관관계를 알아 보았다. 총 662명을 평가한 후 체계적 표본추출 방법을 이용하여 다시 204명을 선택하였다. 결과 : 1) 감정표현불능증의 정도는 신체적 호소, 불안, 우울의 정도와 유의한 상관관계를 보였다. 2) 신체적 호소는 불안, 우울의 정도와 유의한 상관관계를 보였다. 3) 연상한 단어의 수는 나이와 부적 상관관계를 보였다. 4) 강정표현불능증의 정도는 연상한 단어의 수와 유의한 상관관계를 보이지 않았다. 결론 : 감정표현불능증의 정도가 심할수록 신체적 호소는 더 많으며 이는 불안, 우울의 정도와 연관되어 있었으나 어휘의 양과는 유의한 관계를 발견할 수 없었다.