• 제목/요약/키워드: basic materials

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대학도서관 구성요소의 역할 및 그 실태분석 (An analytic study of components of university libraries)

  • 전재봉
    • 한국도서관정보학회지
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    • 제16권
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    • pp.1-32
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    • 1989
  • The purpose of the study is to provide the basic information for the improvement of university libraries in future. To acquire the basic information, the equipments and facilities, materials, personnels and budget elements of university are analyzed. The results of this study can be summarized as follows: 1. University outhorities primary concerned the establishment of universities rather than university libraries. 2. University libraries do not secure the facilities, materials and personnels sufficiently. 3. The realities of university libraries in Korea are very poor condition.

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Impedance Spectroscopy of ${\pi}$-Conjugated Organic Materials

  • Kim, Seong-Hyun;Chu, Hye-Yong;Zyung, Taeh-Young;Yang, Yong-Suk
    • ETRI Journal
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    • 제26권2호
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    • pp.161-166
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    • 2004
  • AC electrical properties of organic light-emitting diodes with poly(2-methoxy-5-(2'-ethyl-hexyloxy)-1,4-phenylenevinylene) (MEH-PPV), poly[2,5-bia(dimethyloctylsilyl)-1,4-phenylenevinylene] (BDMOS-PPV), and tris-(8-hydroxyquinolate)-aluminum $(AlQ_3)$ as light-emitting materials are studied. The frequency-dependent real and imaginary parts of impedance were fitted using an equivalent circuit. We found that the conduction mechanism is a space-charge limited current with exponential trap distribution.

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Spin Seebeck Effect in $SiO_2$/[Py/Pt-strips]

  • Kim, Sang-Il;Park, Seung-Young;Min, Byoung-Chul;Jo, Young-Hun;Lee, Kyung-Jin;Shin, Kyung-Ho
    • 한국자기학회:학술대회 개요집
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    • 한국자기학회 2011년도 자성 및 자성재료 국제학술대회
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    • pp.72-73
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    • 2011
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A Model Study toward the Synthesis of Xestoquinone and Halenaquinone

  • Ahn, Chan-Mug;Woo, Ho-Bum
    • 대한약학회:학술대회논문집
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    • 대한약학회 2003년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.1
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    • pp.240.2-240.2
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    • 2003
  • A strategy for synthesis of the furan-fused tetracyclic core of xestoquinone and halenaquinone was explored through a model study. Methyl 8-oxo-4-methyl-4-phenyl-2,7-nonadiynoate was prepared from hydratroponitrile and 3-butyn-1-ol as starting materials. The intramolecular cycloaddition of this intermediate as a key step will be involved.

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