• Title/Summary/Keyword: Institute of science & technology

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Coherent X-ray Diffraction Imaging with Single-pulse Table-top Soft X-ray Laser

  • Kang, Hyon-Chol;Kim, H.T.;Lee, S.K.;Kim, C.M.;Choi, I.W.;Yu, T.J.;Sung, J.H.;Hafz, N.;Jeong, T.M.;Kang, S.W.;Jin, Y.Y.;Noh, Y.C.;Ko, D.K.;Kim, S.S.;Marathe, S.;Kim, S.N.;Kim, C.;Noh, D.Y.;Lee, J.
    • Proceedings of the Optical Society of Korea Conference
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    • 2008.02a
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    • pp.429-430
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    • 2008
  • We demonstrate coherent x-ray diffraction imaging using table-top x-ray laser at a wavelength of 13.9nm driven by 10-Hz ti:Sapphire laser system at the Advanced Photonics Research Institute in Korea. Since the flux of x-ray photons reaches as high as $10^9$ photons/pulse in a $20{\times}20{\mu}m^2$ field of view, we measured a ingle-pulse diffraction pattern of a micrometer-scale object with high dynamic range of diffraction intensities and successfully reconstructed to the image using phase retrieval algorithm with an oversampling ratio of 1:6. the imaging resolution is $^{\sim}150$ nm, while that is much improved by stacking the many diffraction patterns. This demonstration can be extended to the biological sample with the diffraction limited resolution.

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Protein Tyrosine Phosphatase 1B Inhibitors: Heterocyclic Carboxylic Acids

  • Cho, Sung-Yun;Ahn, Jin-Hee;Ha, Jae-Du;Kang, Seung-Kyu;Baek, Ji-Yoen;Han, Sang-Sub;Shin, Eun-Young;Kim, Sung-Soo;Kim, Kwang-Rok;Cheon, Hyae-Gyeong;Choi, Joong-Kwon
    • Bulletin of the Korean Chemical Society
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    • v.24 no.10
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    • pp.1455-1464
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    • 2003
  • Several series of compounds (benzoic acids, pyrazolecarboxylic acids, phenoxyacetic acids, and quinolinoxyacetic acids) were prepared and evaluated for their inhibitory activity against PTP-1B. Several compounds showed submicromolar inhibitory activity.

Thermal Spray of Nanostructured Materials

  • Hwang, S.Y.;Kim, J.H.;Kim, H.J.;Seong, B.G.;Jun, H.W.;Lee, H.W.;Seok, H.K.;Lee, C.;Yang, H.;Baik, K.H.
    • Proceedings of the Korean Powder Metallurgy Institute Conference
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    • 2006.09a
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    • pp.55-55
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    • 2006
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Current driven nanosecond skyrmion dynamics

  • Song, Kyung Mee;Woo, Seonghoon;Han, Hee-Seung;Jung, Min Seung;Im, Mi-Young;Lee, Ki-Suk;Song, Kun Soo;Kim, Jae-Sung;Fischer, Peter;Hong, Jung Il;Choi, Jun Woo;Min, Byeong-Chul;Koo, Hyun Cheol;Chang, Joonyeon
    • Proceedings of the Korean Magnestics Society Conference
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    • 2016.11a
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    • pp.204-204
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    • 2016
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