• Journal of Korean Ophthalmic Optics Society
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• v.14 no.4
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• pp.83-87
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• 2009

Purpose: This study was performed to detect various chemicals such as metal elements and volatile organic compounds which contained in mascara and we analyzed 5 sorts of mascaras frequently used by people. Methods: We purchased five sorts of mascaras commercially available and analyzed for detecting metal elements and volatile organic ingredients. Results: We found somewhat high concentration of aluminum and manganese and several organic compounds in some samples. Conclusions: The results suggest that mascara has metal elements and organic compounds which can influence to eye.

• 한국정보디스플레이학회:학술대회논문집
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• 2007.08a
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• pp.721-723
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• 2007

Commercial conductive metal inks are available, but metals used in these have unsuitable work function for efficient OLED device performance. Metals with low work function tend to oxidize easily, which makes it challenging to develop low work function metal inks. In this research we describe printed low work function Al cathode.

• Journal of Korean Ophthalmic Optics Society
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• v.1 no.1
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• pp.115-118
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• 1996

The study on the cytotoxicities of heavy metals, metal-metal and metal-chelator combinations was carried out to evaluate the cytotoxic effect of those on mouse L929 fibroblasts. The colorimetric assays (NR and MTT) were conveniently carried out in 96-well microtiter plates. The rank order was Cd > Zn Ni > Cr(III) for the heavy metals tested. Examination of the effect of metal-metal interaction on cytotoxicity showed a moderate reduction of cadmium toxicity by zinc. The colorimetric assays were also effectively used to investigate the effect of the chelators, ethylenediamine tetra acetic acid (EDTA) and chitosan. Reduction of heavy metal toxixity by chelator was efficient.

• Bulletin of the Korean Chemical Society
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• v.25 no.6
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• pp.934-936
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• 2004

• Proceedings of the Optical Society of Korea Conference
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• 2009.02a
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• pp.179-180
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• 2009

• Journal of Korean Ophthalmic Optics Society
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• v.8 no.1
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• pp.47-52
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• 2003

The metallurgical and mechanical experiments of Titanium frame were conducted to investigate the optimum brazing and the improved brazed joints by filler metals has been developed by using other filler metals at brazing process. The filler metal is used in form of a metallic glass. The optimum brazing conditions were obtained from microstructural observation of brazed joints chemical analysis by means of X-ray micro-analysis and heating method.

• Korean Journal of Optics and Photonics
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• v.18 no.3
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• pp.226-231
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• 2007

In this paper, we analyze the characteristics of various curved waveguides composed of double metal strips using finite difference method (FDM). Our investigation reveals that the bending loss of the double metal strip waveguide can be improved with less degradation of the straight waveguide's propagation loss compared to the single metal strip structure. Optimization of the double metal strip waveguide structure has been conducted considering bending and propagation losses.

• Journal of Magnetics
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• v.8 no.1
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• pp.45-49
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• 2003

We present a brief review of recent experimental and theoretical results on new magneto-optical phenomena in magnetic granular metal-insulator alloys with tunnel-type magnetoresistance, focusing on magnetorefractive effect and cubic nonlinear magneto-optics.

• Journal of Korean Ophthalmic Optics Society
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• v.12 no.1
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• pp.17-22
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• 2007

Metal-doped $TiO_2$ thin films were prepared on soda-lime-silica glass substrates by using a spin coating-pyrolysis process. As-deposited films were prefired at $500^{\circ}C$ or 10 min in air. Five-coated films were finally annealed at $600^{\circ}C$ for 30 min in air. High resolution X-ray diffraction, field emission scanning electron microscope and UV spectrophotometer were used to analyze film's property. The largest red shift in optical energy gap is obtained in the Fe-doped $TiO_2$ film.

• Publications of The Korean Astronomical Society
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• v.22 no.3
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• pp.55-61
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• 2007

The KASINICS (Korea Astronomy and Space science Institute Near Infrared Camera System) is a ground-based near-infrared (NIR) imaging instrument. KASINICS has offner relay optics to reduce unwanted infrared light. For the offner optics, we adopted an ultra precision machining process which is installed at KBSI (Korea Basics Science research Institute). Since the offner relay optics is made of aluminum 6061 metal material, we did several tests to reach the specification. We found that a 0.497mm radius nose bite and 220m/min machining speed are best tool and condition to make this offner optics with the precision machine. In this paper, we report the technical method of ultra precision machining and results of the KASINICS offner optics.