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- 저자 : 최진규 (검색결과 607 건)
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섬진강 수계 추령천 유역의 총질소 및 총인의 유출부하 특성
최진규,손재권,구자웅,윤광식,김영주,Choi Jin-Kyu,Son Jae-Gwon,Koo Ja-Woong,Yoon Kwang-Sik,Kim Young-Joo 한국관개배수위원회 2002 한국관개배수논문집 Vol.9 No.2
To provide the basic information for the water quality improvement of the Seomjin River Basin, the water qualities of the Churyeong-cheon watershed were investigated from May in 1999 to September in 2002. Annual total runoff at the Churyeong-cheon watersh
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최진규,Hien Thu Pham,정현담 한국물리학회 2015 Current Applied Physics Vol.15 No.8
In order to pioneer the electron transport properties of silicon (Si) quantum dot-molecule hybrid polymers, we investigate the electron transport properties of the benzene molecule in silicon (Si) semiconductor electrodes, based on nonequilibrium Green's function (NEGF) method coupled with density functional theory (DFT), in comparison with conventional gold (Au) metal electrodes, with three different anchoring linker groups: thiol for dithiol-benzene (DTB), methylene for dimethyl-benzene (DMB), and direct bonding for benzene (Ph). It is interestingly found that, due to band gap nature of the Si semiconductor electrodes, the molecular junctions with the Si electrodes show no current up to the bias voltage of around 0.8 V. In addition, the DTB molecular junctions in the Si semiconductor electrodes connected with SieS bond show higher conducting properties than other DMB and Ph molecular junctions directly coupled to the electrodes with the SieC bonds (DMB < Ph < DTB). The electron transport properties of the molecules in the two different electrodes are analyzed on the basis of the understanding transmission spectra, projected density of states (PDOS), and molecular orbitals. We believe that the use of thiol linker may open new possibility in the molecular electronics with the Si semiconductor electrodes and the Si QD-molecule hybrid polymers concept.
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2P-736 Performance Comparison of the Middle Layers of the Four Layers Attachment type Heat Blocker
최진규,장상목,양수철,김종민,박경희,이원희 한국공업화학회 2017 한국공업화학회 연구논문 초록집 Vol.2017 No.1
표피층, 다공성막 층, 알루미나 원단, 매시층의 4층 구조 부착형 열차폐제에서 알루미나 원단과 매시층 결합막과 다공성막 층의 성능을 비교 검토하였다. 그리고 이들 결과를 이용하여 표피층, 다공성막 층, 알루미나 원단, 매시층의 4층 구조 부착형 열차폐제를 제작하여 60, 90, 100°C에서 열차폐 성능을 테스트하였다. 본 시제품의 사양은 열투과도는 20% 미만 (최대허용치 30% 미만)으로, 발열체와 주위온도를 측정하여 그 온도차를 ±5°C (최대허용 온도 ±8°C)로 규정하였다. 실험은 50 ㎝ × 50 ㎝의 4층 구조 시편을 제작하여 스팟 열화상 온도계 FLIR Systems을 이용하여 측정하였다. 자체 제작한 샘플 시험 거치대에 시편을 고정하여 실내 온도 이퀄라이저로 주변 온도를 30°C로 조절하면서 30 sec. 간격으로 측정 FLIR thermal picturefh 부터 온도를 측정하여 분석하였다.
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최진규,이명연,심상은 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
Polyurethane (PU) has excellent elasticity as organic material. However, the limitation of thermal insulation of PU is obvious for the nature of material. On the other hands, the silica aerogel present low thermal conductivity. Because it attributes superb insulation to high porosity, large surface area by meso pores of silica networks. Silica aerogel is brittle for weak mechanical strength while the insulation property is worthy of notice. The inherent fragility of networks of silica aerogel was reinforced by the cross-linking of polymer chains. PU act such as shock absorber to cover mechanical defect of composite when there is external impact. This synthesis was followed by ambient pressure drying. The research analyzed about the thermal conductivity and mechanical properties of inorganic/organic hybrid composite. <sup>**</sup> This work was supported by grant(10080492) from Korea Evaluation Institute of Industrial Technology under Ministry of Trade, Industry and Energy(MOTIE), Republic of Korea.
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