• 전기의세계
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• v.42 no.12
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• pp.24-33
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• 1993

1. LSHM은 제어성, 효율, 힘/중량면에서 매우 우수하고, LIM은 제어성과 신뢰성면, LSHM에 비하여 기술의 단순성에 의한 가공비와 유지보수비가 저렴한 측면에서 유리하다. 2. 효율면에서는 LHSM이 LIM이 보다 유리하지만 리니어모우터의 재작비와 특랙의 제작면에서는 LSRM이 유리하고, 리니어모우터의 자체중량이나, 트랙의 필요한 철의 중량면에서는 LIM이 유리하다. 3. LIM에비해 LSHM이 추진/부상이 동시에 발생할 수 있도록 수직력이 크게 발생하며, 효율과 역율이 매우좋다. 4. 가장 선두로 개발하고 있는 독일과 일본의 기술개발 연혁을 검토해 보면 공통점은 초기에는 유도형 LIM으로 시작하였다가 나중에는 동기형인 LIM으로 추진시스템으로 전환하였다.

• Journal of Korean Classical Literature and Education
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• no.37
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• pp.47-73
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• 2018

This thesis aims to find out the purpose of recording . I tried to understand the reason that the compiler of included this song in the record of King Yuri. The result of tracking the intention of the compiler in this thesis is as follows. I think that was chosen as a symbol of King Yuri's character, especially connected with his inner side. By introducing a hobby that contained the inner side of King Yuri, the compiler implied that his failures and mistakes in subsequent governments stem from human limitations that did not adequately refine his qualities. I think that the compiler who showed the character of King Yuri through only one short song also showed the highest level of enjoying poetry. The enjoyment of literature is a pleasure in understanding the life of someone through literature and bring it back into their lives. In this respect, by pursuing the intend of the compiler, we will be close to the value of the song, .

• Journal of the Korean Ceramic Society
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• v.38 no.7
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• pp.628-633
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• 2001

전자 패키징에 적용 가능한 저융점 유리 중에서 납성분이 포함되어 있지 않는 Bi계 유리의 연구를 행하였다. 기판과의 일체화를 위한 유리의 응용으로, 소자와의 반응 억제와 열응력 완화를 위해 유리의 저융점화 및 열팽창계수를 제어하였다. 본 연구에서 제조된 Bi계 유리는 DTA와 TMA의 열분석을 통해 5$50^{\circ}C$ 부근에서 연화점이 있고, 열팽창계수는 7.52~12.09$\times$$10^{-6}$/$^{\circ}C$의 범위였으며, 비유전율은 9~13이었다. 본 연구의 납성분을 포함되어 있지 않는 유리조성은 우수한 내산성을 나타내었다.

• 비료회보
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• s.443
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• pp.32-48
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• 1994

• 전기의세계
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• v.39 no.11
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• pp.45-51
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• 1990

원자력발전이 화석연료를 연소하는 화력발전에 비하여 유리한 점은 연료비가 저렴하며, 핵연료 주기를 국산화함으로서 에너지 해외 의존도를 줄일 수 있다는 점이므로 국가 차원의 체계적인 핵연료 주기 기술자립계획의 수립과 적극적인 추진이 요구된다.

• Journal of Conservation Science
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• v.27 no.3
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• pp.243-250
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• 2011

Seven glass beads from Bupwha-ri site, Yeongdong dated Joseon dynasty were analyzed with SEM/EDS and X-ray diffraction methods. Six samples were classified to potash glass system($K_2O-CaO-SiO_2$) with HCA(High CaO and $Al_2O_3$) and high concentration of MgO suggested raw materials to plant ashes. Especially one sample from tomb no. 8 was highly different concentration of $K_2O$ and MgO with others. It was shown that they were different sources of raw materials. Mostly coloring agents of potash glasses were owing to Fe and Cu. One sample was found to lead glass system(PbO-$SiO_2$) with 12% PbO. The content of PbO was differentiated with other lead glasses since we analyzed so far. It needs more study for compositions of lead glasses with regions and ages.

• The Journal of the Korea Contents Association
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• v.18 no.2
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• pp.290-300
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• 2018

The point of discovering a new technique using colored glass and clay is to improve the existing inconveniences, which is compatible with the mutual physical property of ceramics clay and glass. It is easy to express the decoration of colored glass in vertical ceramics, but the aesthetic expression is limited due to the rust flowing down on horizontal ceramics. So the point is the discovery of a new expressive method that do not melt down in vertical objects. A new technique is to crush finely and dilute the colored glass using clay, and brushing it to the wall. Additionally, inlaid technique and paste brush technique were applied to further enhance aesthetic end. The plastic method is oxidation and reduction, and the coloration was different due to the plasticity method. Particularly, partial cutting of engraved color glass leads to forming gray-line soft gradation. This effect will be good to apply to production of work and industrial ceramics.

• Applied Chemistry for Engineering
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• v.29 no.1
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• pp.112-116
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• 2018

In this study, the mixing characteristics of water glass and additives (Si, alkali metal), which are one of the main raw materials of silicate based binder used in the production of molds during casting process, were examined. Molecular structures of water glass, additives and mixtures were analyzed FT-IR and viscosity measurements and their correlation were compared. The addition of Si source to the water glass accelerated the Si networking in the material and increased the viscosity. When the alkali metal was added, the viscosity of the water glass decreased by suppressing the Si networking of the water glass. Viscosities of the water glass and lithium silicate (LS) mixtures increased when the content of LS was less than 20 wt% and gradually decreased when the content was more than 20 wt%. By adding KOH to the water glass, the viscosity could be lowered and it could be used effectively to mix with colloidal silica (CS) or potassium methyl siliconate (PMS).

• Proceedings of the International Microelectronics And Packaging Society Conference
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• 2001.11a
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• pp.189-194
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• 2001

PDP(Plasma Display Panel)의 투명 유전체에 적용 가능한 저융점 유리 중에서 납성분이 포함 되어 있지 않는 Bi계 유리의 연구를 행하였다. 기판과의 일체화를 위한 유리의 응용으로, 소자와의 반응 억제와 열응력 완화를 위해 유리의 저융점화 및 열팽창 계수를 제어하였다. 본 연구에서 제조된 Bi계 유리는 DTA와 TMA의 열분석을 통해 50$0^{\circ}C$부근에서 연화점이 있고, 7.31~10.02$\times$$10^{-6}$$^{\circ}C$, 비유전을 11.1~13.3, 광투과도가 80%이상으로 PDP 투명유전체에 적용 가능한 Bi계 유리를 얻을 수 있었다.

• Applied Chemistry for Engineering
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• v.20 no.3
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• pp.266-272
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• 2009

Physical and chemical properties of waste LCD glass were investigated to test the feasibility of feed materials for the production of foamed glass. For this study, chemical analysis, thermal analysis, rheological consideration with the viscosity change under high temperature and thermal expansion coefficient were carried out and the trial production of foamed glass as; in spherical and block type also attempted. All results showed waste LCD glass would be a good feed material for the production of foamed glass and foaming technology of LCD glass would be an effective recycling alternative.