• Journal of the Korea Institute of Information and Communication Engineering
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• v.11 no.7
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• pp.1260-1266
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• 2007

The information and communication technology under developing from was time of broadcast and communication Convergence. There is iCOD with representative service of broadcast and communication Convergence. This the superhigh speed Internet about under using is the service which provides information service, the video contents and broadcasting and others with TV. But this service when it searches broadcasting information of different Channel, again must analyze the stream of broadcasting there is a problem point. This thesis hereupon iCOD broadcasting services it searched efficiently from the terminal and in order the fact that it selects from iCOD broadcasting streams SI information about under extracting SD&S base iPG XML documents it created and it transmits with the distant mote cast the method which and it planned it embodied.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.40 no.4
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• pp.321-330
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• 2014

Ultraviolet B (UVB) is a primary environmental factor that induces adverse effects on skin such as photoaging, skin burn and cancer. UVB also increases the expression of $11{\beta}$-hydroxysteroid dehydrogenase type 1 ($11{\beta}-HSD1$), which converts inactive cortisone to active cortisol in response to a variety of stressors in target tissues. Thus, we have screened new herbal extracts that suppress $11{\beta}-HSD1$ expression induced by UVB in human dermal fibroblasts. We also investigated whether Trapa japonica (TJ) extract and its fractions inhibit UVB-induced photoaging in Hs68 cells and 3D skin model. Results showed that TJ extract inhibited the increase of $11{\beta}-HSD1$ expression in UVB-exposed Hs68 cells significantly. TJ extract and its fractions not only inhibited $11{\beta}-HSD1$ expression, but also suppressed the increase of matrix metalloproteinases (MMP-1, 3, 9) and proinflammatory cytokines (IL-6, 8) in UVB-irritated Hs68 cells. TJ extract also inhibited MMP-1 expression in UVB-irritated 3D skin model. In addition, TJ extract recovered UVB-induced decreases of epidermal thickness and PCNA-positive cells in 3D skin model. Taken together, these results suggest that TJ extract and its fractions inhibit UVB-induced skin photoaging by interfering with $11{\beta}-HSD1$ and MMPs.

• Bulletin of the Korean Chemical Society
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• v.26 no.11
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• pp.1829-1832
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• 2005

• Proceedings of the Korean Information Science Society Conference
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• 2007.10a
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• pp.90-91
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• 2007

• Korean Journal Plant Pathology
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• v.11 no.4
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• pp.318-323
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• 1995

The effect of AF-toxin I produced by the strawberry pathotype of Alternaria alternata on the protein synthesis of susceptible strawberry protoplasts was examined by using the radiolabeled amino acids. The incorporation of the radiolabeled amino acids into newly synthesized proteins in the strawberry protoplasts was stimulated by the toxin treatment at relatively low concentrations (2.2$\times$10-11 to 2.2$\times$10-9 M), but not at higher concentrations (2.2$\times$10-8 to 2.2$\times$10-6 M). An one-dimensional SDS-polyacrylamide gel electrophoresis revealed no detectable differences in the proteins synthesized in both the toxintreated and untreated protoplasts. The susceptible strawberry protoplasts were treated with AF-toxin I and stained with Fluostain I to detect the extracellular polysaccharides. The toxin treatment induced the accumulation of extracellular polysccharides in a dose-dependent manner. These results indicate a transient activation of cellular metabolism in the susceptible cells by the toxin exposure.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.22 no.11
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• pp.974-979
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• 2009

We studied solution-processed single-layered phosphorescent organic light-emitting diodes (PHOLEDs), doped with ionic salt and treated with simultaneous electrical and thermal annealing. Because the simultaneous annealing causes the accumulation of salt ions at the electrode surfaces, the energy levels of the organic molecules are bent by the electric fields due to the adsorbed ions, i.e., the simultaneous annealing can induce the proper formation of an ionic p-i-n structure. As a result, an ionic p-i-n PHOLED with a peak luminescence of over ${\sim}35,000\;cd/m^2$ and efficiency of 27 cd/A was achieved through increased and balanced carrier-injections.

• Journal of Power Electronics
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• v.8 no.1
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• pp.1-9
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• 2008

This paper presents the design and analysis of a new input AC current wave shaping AC-DC converter for cost effective harmonic mitigation under varying loads. The proposed converter consists of a delta-polygon connected autotransformer based twelve-pulse AC-DC converter and a small rating passive shunt filter tuned at $11^{th}$ harmonic frequency. The proposed AC-DC converter eliminates the most dominant $5^{th},\;7^{th}$ and $11^{th}$ harmonics and reduces higher order harmonics; thereby, resulting in an improved power quality at AC mains. Moreover, the design of the autotransformer is modified to make it suitable for retrofit applications, where presently a 6-pulse diode bridge rectifier is used. To validate the proposed approach, various power quality indices are presented under varying loads. Experimental results obtained on the developed converter are given to validate the model and design of the proposed converter.

• Archives of Pharmacal Research
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• v.17 no.1
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• pp.1-4
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• 1994

From the stems of Solanum lyratum Thunb.(Solanaceae), two sesquiterpenoids together with two 5$\alpha$, 8$alpha-epidioxy sterols have been isolated and identified as atractylenolide I, dehydrocarissone, engosterol peroxide, 9, 11-dehydroergosterol peroxide. These compounds never previously isolated from this genus.

• The Journal of the Acoustical Society of Korea
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• v.11 no.6
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• pp.15-22
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• 1992

i.i.d 신호의고차 모멘트와 스펙트럼의 성질에 대하여 4차까지 고찰하였으며 이의 결과를 이용하 여 2차 Volterra 급수로 표시되고, i.i.d. 입력 신호를 갖는 시불변 비선형 시스테므이 파라메타들을 추정 하는 알고리즘을 시간 영역과 주파수 영역에서 각각 제안하였다. 비록 2차 Volterra 급수가 i.i.d. 입력 신호에 대하여 orthogonal 모델이 아닐지라도 입력 신호의 각종 시간지연에 대한 모멘트나 역행렬의 계 산등이 요구되지 않으며 선형 전달함수와 2차 전달함수를 추정할 수 있는 알고리즘이 존재하는 것을 보 았다.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.8 no.6
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• pp.112-120
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• 2009

Both security enhancement in wireless and fast access for mobility are required to employ wireless LAN in ITS (Intelligent Transportation Systems). However, for the case of employing IEEE 802.11i security standard, it is known that the user authentication procedure of IEEE 802.1x and 4-way handshake procedure for stronger security enforcement may not be suitable for ITS due to its large delay. In this paper, we propose fast authentication method to resolve the above authentication delay problem, and verify its performance via simulation analysis.