• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2006년도 추계학술대회 논문집
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• pp.361-362
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• 2006

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2007년도 Proceedings of ISRS 2007
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• pp.325-328
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• 2007

We discuss the Normalized Difference Vegetation Index (NDVI) of the forest canopy and floor separately based on airborne spectral reflectance measurements and simultaneous airborne land surface images acquired around Yakutsk, Siberia in 2000. The aerial land surface images were visually classified into four forest types: no-green canopy and snow floor (Type-1), green canopy and snow floor (Type-2), no-green canopy and no-snow floor (Type-3), and green canopy and no-snow floor (Type-4). The mean NDVI was calculated for these four types. Although Type-2 had green canopy, the NDVI was rather small (0.17) because of high reflection from the snow cover on the floor. Type-3, which had no green canopy, indicated considerably large NDVI (0.45) due to the greenness of the floor. Type-4 had the largest NDVI (0.75) because of the greenness of both the canopy and floor. These results reveal that the NDVI depends considerably on forest floor greenness and snow cover in addition to canopy greenness.

• 복식
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• 제56권5호
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• pp.59-74
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• 2006

The purpose of this study is to investigate the skin type of $20{\sim}30’s$ women that use skin type test paper of cosmetic companies and usual using condition for the cosmetics. The result is as follows; The research target is $20{\sim}30’s$ woman in Seoul area, around capital city area and Geonra province, we surveyed the difference among the group, after dividing the groups with job, monthly income. As the result of research on the usual using cosmetics and cleansing products, $20{\sim}30’s$ woman mostly have toilet water, lotion and foam type cleansing product and use them. As the result of consciousness of skin type combination skin type is 46.1%, dry skin type is 23%, oily skin type is 15%, sensitive skin type is 9%, normal skin type is 7%. To compare results of skin type test paper of cosmetics companies with consciousness of skin type, result of skin type test paper of cosmetics companies was different consciousness of skin type. The result of skin type test paper of B company is same as consciousness of skin type is 31.2% and this result among cosmetics companies was appeared high ratio. Among the results from 3 companies, the rate that all result for 1 person's skin type are accord, is just 8%. 2 companies among them have matching rate of 42%. Most of all, each results of skin type test paper of cosmetics companies was appeared difference. This result show the problem of objectivity about skin type test paper of cosmetics companies that they using it.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1991년도 하계학술대회 논문집
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• pp.277-280
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• 1991

We have developed 154kV OF cable accessories from 1987. 4 to 1990. 10 by doing assembly design, investing equipment, manufacturing inspecting parts, type testing in labortary, in our company, in KEPCO. The one of those accessories. Oil Stop Joint, has been developed by using Shield Metal Embeded Type Epoxy Unit. This is More reliable than old type.

• 대한약학회:학술대회논문집
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• 대한약학회 2002년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.2
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• pp.373.3-374
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• 2002

Alismatis Rhizoma is originated from the rhizome of Alisma plantago-aquatica L. var. orientale Samuelson or A. canaliculatum A. Br. et Bouche (Alismataceae). Prostane-type triterpenes, guaiane-type sesquiterpenes, and kaurane-type diterpenes have been reported as the main canstituents from these plants. Four prostane-type triterpenes. alisol B 23-acetate (1). alisol C 23-acetate (2), alisol B (3). and alisol A 24-actate (4). were isolated from the EtOAc-soluble fraction of this dried rhizome. (omitted)

• Journal of Microbiology and Biotechnology
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• 제6권1호
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• pp.68-69
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• 1996

The isoprenoid quinone composition of Leclercia adecarboxylata KCTC $1036^T$ was determined by using high-performance liquid chromatography. L. adecarboxylata KCTC $1036^T$ are characterized by their production of both ubiquinone-7, ubiquinone-8 and menaquinone-8 as major quinones. It is clear that the analysis of isoprenoid quinone profiles provides a new criterion of great promise for identifying Leclercia strains.

• 대기
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• 제29권4호
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• pp.463-480
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• 2019

This study classified heavy rain types from K-means clustering for the hourly relationship between rainfall intensity and cloud top height over the Korean peninsula, and then examined their statistical characteristics for the period of June~August 2013~2018. Total rainfall amount of warm-type events was 2.65 times larger than that of the cold-type, whereas the lightning frequency divided by total rainfall for the warm-type was only 46% of the cold-type. Typical cold-type cases exhibited high cloud top height around 16 km, large reflectivity in the upper layer, and frequent lightning flashes under convectively unstable condition. Phenomenally, the cold-type cases corresponded to cloud cluster or multi-cell thunderstorms. However, two warm-type cases related to Changma and typhoon were characterized by heavy rainfall due to long duration, relatively low cloud top height and upper-level reflectivity, and the absence of lightning under the convectively neutral and extremely humid conditions. This study further confirmed that the forecast skill of rainfall could be improved by applying correction factor with the overestimation for cold-type and underestimation for warm-type cases in the Local Data Assimilation and Prediction System (LDAPS) operational model (e.g., BIAS score was improved by 5%).

• 전기학회논문지
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• 제62권11호
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• pp.1633-1639
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• 2013

In a section of AC electric railway, a phase between the sections is different although voltage levels supplied from substations are the same. Therefore, section insulators have been installed to electrically divide between the sections. Two differenet types of section insulator, namely an overlap type and insulator type, are used. In Korean high-speed lines, overlap type section insulator has been adopted. And, insulator type is used in conventional line. The overlap type has the advantage of having no speed limit, but has the disadvantage of requiring long section length. However, the insulator type has the advantage of section length, but also has the disadvantage of having speed limit. In Korean conventional line, an insulator type one relies on the import and there is some problem with wear. In this study, we developed the insulator type section insulator which adopts Teflon tube insulation material. The Teflon material has advantage of the excellent electrical characteristics and wear-resistance characteristics for a longer expected life than that made of existing FRP. In order to compare wear characteristics between the materials, wear tests with reciprocal wear tester are performed. And dynamic behavior tests between the insulators and pantograph are also performed for showing its better dynamic characteristics.

• Journal of Microbiology and Biotechnology
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• 제28권11호
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• pp.1908-1915
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• 2018

Upon viral infection, the host cell recognizes the invasion through a number of pattern recognition receptors. Melanoma differentiation associated gene 5 (MDA5) and retinoic acid-inducible gene-I (RIG-I) recognize RNA molecules derived from invading viruses, activating down-stream signaling cascades, culminating in the induction of the type I interferon. On the other hand, viruses have evolved to evade type I interferon-mediated inhibition. Hepatitis E virus has been shown to encode a few antagonists of type I interferon and it is not surprising that viruses encode multiple mechanisms of viral evasion. In the present study, we demonstrated that HEV PCP strongly down-regulates MDA5-mediated activation of interferon ${\beta}$ induction in a dose-dependent manner. Interestingly, MDA5 protein expression was almost completely abolished. In addition, polyinosinic polycytidylic acid (poly(I:C))- and Sendai virus-mediated activation of type I interferon responses were similarly abrogated in the presence of HEV PCP. Furthermore, HEV PCP down-regulates several molecules that play critical roles in the induction of type I IFN expression. Taken together, these data collectively suggest that HEV-encoded PCP is a strong antagonist of type I interferon.

• 비파괴검사학회지
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• 제28권2호
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• pp.151-156
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• 2008

반도체나 디스플레이 제조 등 진공공정의 리크검출에는 질량분석기형(mass spectrometer type) 헬륨 리크검출기(leak detector)가 사용되고 있다. 이 기기를 이용해서 안정된 측정값을 얻기 위해서는 장치 내부에 내장된 투과형(permeation type) 표준리크(standard leak)를 이용해서 자주 spectrometer를 교정해야 한다. 본 연구에서 질량분석기형 리크검출기의 비교교정 장치의 개발과 교정방법에 대한 연구결과를 언급하였다. 따라서 이 기술을 이용하면 질량분석기형 리크검출기를 구비하고 있는 현장에서도 표준리크의 비교교정이 가능하게 된다.