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- 저자 : Bin Lee (검색결과 8,752 건)
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A Development of Assessment Model for Maintenance of Type R Fire Alarm System in the Building
Lee,Su-Kyung,Yoo,Sang-Bin,Nam,Yang-Won 한국화재소방학회 1997 한국화재소방학회 학술대회 논문집 Vol.1997 No.-
Type R fire alarm is required intelligent buildings and height buildings which was based on automatic system. But in Korea, maintenance of fire alarm system is very poor. In this study, we developed assessment model for the type R fire alarm system which was assessed by using 96 checklist items. The assessment model was tested through the actual 4 buildings with type R fire alarm system. It is shown that present model can be applied for the assessment of all buildings through the examination of the suitability of assessment model by actual assessment. Also, it was made easily fire manager to carry out checklist for type R fire alarm system in buildings.
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全永鎬,李彬娜,林凞燮 弘益大學校 科學技術硏究所 2005 科學技術硏究論文集 Vol.16 No.-
Brand asset management to build powerful brand asset is needed to have more powerful comparative advantage. In this study, critical factors of the structure of brand asset are considered. For this purpose, the relationships between the brand asset and the structure of brand asset are evaluated. And measurement of the competitive power of the specific brand at the point of clients by describing the systematic measuring methodology of the brand asset and its applications is studied. And then, the model that can be used to solve and improve the general realities and level of brand management is proposed. For this, we recognized the strategic importance of brand asset and the brand asset management with previous studies. And we improved the model that showed that the increasing of brand competitive power makes purchasing intention and the brand loyalty increase at the point of clients by pointing out the limit of previous studies. With this improved model, we investigated the brand competitive power on digital electric home appliances about images, sounds, and communications. To test this model statistically, the structural equation model that is most popular in the latest is used. By using the result of this study, companies will be able to measure of their own and the other's brand competitive power and understand the method of benchmarking and the improvements. Moreover, the government will be able to draw up the plan and the system that support to secure the brand competitive power and bring up the global brand that have international competitive power.
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색상 측정 기기를 이용한 복합레진 적층 수복과 단일 수복의 색상 비교 분석
송영상,김자현,이빈나,장지현,장훈상,황윤찬,오원만,황인남 大韓齒科保存學會 2012 Restorative Dentistry & Endodontics Vol.37 No.2
Objectives: This study analyzed the difference in color caused by different thickness in enamel layer of composite resins when applied with single and layering placement technique, and evaluated if the results agreed with the shade guide from the manufacturers to verify reliability of the color matching process of the manufacturers. Materials and Methods: For single composite resin samples, 6 mm diameter and 4 mm thickness cylindrical samples were fabricated using Ceram-X mono (DENTSPLY DeTrey) and CIE L*a*b* values were measured with spectrophotometer. Same process was done for layering compositie resin samples, making 3 dentinal shade samples, 4 mm thickness, for each shade using Ceram-X duo (DENTSPLY DeTrey) and enamel shade resins were layered in 2 mm thickness and CIE L*a*b* values were measured. These samples were ground to 0.2 mm thickness each time, and CIE L*a*b* values were measured to 1 mm thickness of enamel shade resin. Results: Color difference (△E*) between single and layering composite resin was 1.37 minimum and 10.53 maximum when layering thicknesses were between 1 mm and 2 mm and 6 out of 10 same shade groups suggested by manufacturer showed remarkable color difference at anythickness (△E* > 3.3). Conclusion: When using Ceram-X mono and duo for composite resin restoration, following the manufacturer's instructions for chossing the shade is not appropriate, and more accurate information for Ceram-X duo is needed on the variation and expression of the shades depending on the thickness of the enamel. (Restor Dent Endod 2012;37(2):84-89)
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대사공학에 의해 개발된 코리네박테리움 글루타미컴에 의한 4-히드록시벤질 알코올 생산
김부연 ( Bu-yeon Kim ),정혜빈 ( Hye-bin Jung ji-yeong Lee ),이지영 ( Lenny Ferrer ),페러레니 ( Henry Syukur Purwanto ),푸완토헨리슈쿠르 ( Jin-ho Lee1 ),이진호 한국미생물생명공학회 2020 한국미생물·생명공학회지 Vol.48 No.4
4-Hydroxybenzyl alcohol (4-HB alcohol) is one of the major active components of Gastrodia elata Blume, with beneficial effects on neurological disorders such as headache, convulsive behavior, and dizziness. Here, we developed a metabolically engineered Corynebacterium glutamicum strain able to produce 4-HB alcohol from 4-hydroxybenzoate (4-HBA). First, the strain APS963 was obtained from the APS809 strain via the insertion of aroK from Methanocaldococcus jannaschii into the NCgl2922-deleted locus. As carboxylic acid reductase from Nocardia iowensis catalyzes the reduction of 4HBA to 4-hydroxybenzaldehyde (4-HB aldehyde), we then introduced a codon-optimized car gene into the genome of APS963, generating the GAS177 strain. Then, we deleted creG coding for a putative short-chain dehydrogenase and inserted ubiCpr encoding a product-resistant chorismate-pyruvate lyase into the pcaHG-deleted locus. The resulting engineered GAS355 strain accumulated 2.3 g/l 4-HB alcohol with 0.32 g/l 4-HBA and 0.3 g/l 4-HB aldehyde as byproducts from 8% glucose after 48 h of culture.
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Variation of Floating Potential in the Topside Ionosphere Observed by STSAT-1
Junhyun Lee,Ensang Lee,Jaejin Lee,Khan-Hyuk Kim,Jongho Seon,Dong-Hun Lee,Ho Jin,Eung-Hyun Kim,Hyun-Jin Jeon,Seong-Bin Lim,Taeyoun Kim,Jaewoong Jang,Kyung-Duk Jang,Kwangsun Ryu 한국우주과학회 2014 Journal of Astronomy and Space Sciences Vol.31 No.4
In this study, we investigated the effect of space plasmas on the floating potential variation of a low-altitude, polar-orbiting satellite using the Langmuir Probe (LP) measurement onboard the STSAT-1 spacecraft. We focused on small potential drops, for which the estimation of plasma density and temperature from LP is available. The floating potential varied according to the variations of plasma density and temperature, similar to the previously reported observations. Most of the potential drops occurred around the nightside auroral region. However, unlike the previous studies where large potential drops were observed with the precipitation of auroral electrons, the potential drops occurred before or after the precipitation of auroral electrons. Statistical analysis shows that the potential drops have good correlation with the temperature increase of cold electrons, which suggests the small potential drops be mainly controlled by the cold ionospheric plasmas.
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