• Journal of The Korean Astronomical Society
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• v.33 no.3
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• pp.143-149
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• 2000

We present the results of near-IR band (JHK) photometric study for the old open cluster To 2. Combined with existing optical data, our IR photometry is used to derive the reddening E(B- V)=0.24$\pm$0.12 and the distance (m-M)o=14.6$\pm$0.42. Comparison with theoretical isochrones suggests the age and metallicity of To 2 are log t$\~$9.3 and [Fe/H]$\~$-0.3, respectively.

• Electronics and Telecommunications Trends
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• v.20 no.6 s.96
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• pp.132-143
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• 2005

BcN 비즈니스 환경은 언제, 어디서나, 누구에게도 편리하고 안전하며, 쉽고 개인화된차세대 통신서비스를 제공해 준다. BcN 서비스 모델은 기존 망 서비스를 심리스(seamless)하게 수용하고 통합망 인프라 상에서 통합형 응용서비스를 제공하며, 고객니즈형 멀티미디어 서비스, 표준 프로토콜/개방형 API 기반 다양한 서비스 환경을 제공해야 한다. 본 고에서는 국내외 통신사업자들의 BcN 서비스를 음성. 데이터 통합서비스, 유무선 통합 서비스, 통신. 방송 융합 서비스 등을 중심으로 분석하고자 한다.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2006.10a
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• pp.143-144
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• 2006

• Electronics and Telecommunications Trends
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• v.22 no.3 s.105
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• pp.136-143
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• 2007

인터넷의 확산과 웹 2.0 환경의 도래에 따라, 사용자가 관리해야 하는 디지털 형태의ID 정보가 기하 급수적으로 증가하고 있다. 이것은 사용자의 ID 관리 부담, 동일한 패스워드의 반복적인 사용으로 인한 보안성 저하, ID 정보의 유출에 의한 사용자 프라이버시 침해 문제 등을 발생시키고 있다. 따라서 사용자를 인증하고, 사용자의 ID 정보를 관리해주는 ID 관리 시스템이 매우 중요해지고 있다. 본 고에서는 인터넷 규모의 온라인 서비스를 대상으로 사용자를 인증하고 사용자의 ID 정보를 관리하는 대표적인 ID관리 시스템인 SAML, CardSpace, Open ID를 살펴 보고, 이들 시스템의 특징을 비교 분석한다.

• Journal of applied mathematics & informatics
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• v.11 no.1_2
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• pp.143-154
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• 2003

Analytical solutions for the viscous Cahn-Hilliard equation are considered. Existence and uniqueness of the solution are shown. The exponential decay of the solution in H$^2$-norm, which is an improvement of the result in Elliott and Zheng[5]. We also compare the early stages of evolution of the viscous Cahn-Hilliard equation with that of the Cahn-Hilliard equation, which has been given as an open question in Novick-Cohen[8].

• 한국전산유체공학회:학술대회논문집
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• 2003.08a
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• pp.139-143
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• 2003

In this study the numerical analyses on cavity flow in supersonic flow field are conducted. According to the length-to-depth ratio of cavity, the shear layer is changed, consequently influencing on vortex structure inside the cavity. Especially in case the fluid flow outside cavity impinges inside the cavity, the oscillation of the cavity flow is identified. Another result is that though the cavity flow shows the unsteadiness, characteristics of cavity flow can be represented by pressure coefficients converged.

• YAKHAK HOEJI
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• v.22 no.2
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• pp.83-86
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• 1978

A colorless sublime needles (A), $C_{10}H_{10}O_{4}$, mp$142~143\circ$ was isolated from the fresh flowers of Chrysanthemun sinense Sabine in 0.16% yield. Its ir, nmr and mass spectral data suggested that it may have an aromatic methylester structure. Hydrolysis of this substane with 10% sodium hydroxide solution yielded terephthalic acid and methanol. This substance was confirmed as dimethyl terephthalate by comparison of ir and nmr spectra, and TLC and GC behaviors of an authentic sample which was prepared from terephthalic acid by methylation. This is the first report that dimethly terephthalate was isolated in the Composite plants.

• Journal of the Korean institute of surface engineering
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• v.26 no.3
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• pp.143-148
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• 1993

Composition and microstructures of Silver-Tin alloy deposits from a pyrophosphate bath were studied under the D.C. electrolysis conditions. Cathode current efficiency and throwing power of alloy deposits de-creased with increasing current density. Tin content of Ag-Sn alloy deposits decreased noticeably with the cur-rent density and with decreasing pH. The preferred orientation of the deposits tended to change in sequence of (110)longrightarrow(111)longrightarrow(100) texture with increasing the cathode overpotential. The surface structure of alloy deposits showed the smooth surface structure with fine crystallites.

• 대한예방의학회:학술대회논문집
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• 2000.10a
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• pp.143-144
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• 2000

• Animal Systematics, Evolution and Diversity
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• v.22 no.2
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• pp.139-143
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• 2006

From the result of this study for the materials collected in Mt. Changbai-shan, six species of the family Noctuidae, Pangrapta marmorata Staudinger, P. griseola Staudinger, Ctenostola sparganoides (Bang-Haas), Cucullia amota Alpheraky, Xestia albonigra (Kononenko), and X. speciosa $(H\ddot{u}bner)$, are reported for the first time from China.