• Title/Summary/Keyword: Research center

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Influence of vacuum annealing on the secondary electron emission coefficient(${\gamma}$) from a MgO protective layer

  • Jeoung, J.M.;Leem, J.Y.;Cho, T.S.;Choi, M.C.;Ahn, J.C.;Kim, J.G.;Kim, Y.G.;Cho, D.S.;Kim, S.S.;Kim, T.Y.;Choi, S.H.;Chong, M.W.;Ko, J.J.;Kim, D.I.;Lee, C.W.;Kang, S.O.;Cho, G.S.;Choi, E.H.
    • 한국정보디스플레이학회:학술대회논문집
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    • 2000.01a
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    • pp.113-114
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    • 2000
  • The secondary electron emission coefficient(${\gamma}$) of vacuum annealed MgO films has been investigated by ${\gamma}-focused$ ion beam(${\gamma}-FIB$) system. The vacuum annealed MgO films have been found to have higher ${\gamma}$ values from 0.053 up to 0.121 than those for as-deposited MgO films from 0.026 up to 0.062 for $Ne^+$ ion energies ranged from 50eV to 200eV. Also it is found that ${\gamma}$ for air hold of vacuum annealed MgO layers for 24-hours is similar to that for vacuum annealed MgO films without any air-hold.

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Novel K/Ka Bandpass Filters using LIGA Micromachined Process

  • Park, K. Y.;Park, J. Y.;Choi, H. K.;Lee, J.C.;Lee, B.;Kim, J. H.;Kim, N. Y.;Park, J. Y.;Kim, G. H.;Kim, D. W.;Bu, J. U.;Chung, K. W.
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.11 no.6
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    • pp.969-975
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    • 2000
  • New class of three dimensional (3-D) micromachined microwave planar filters at K and Ka-band are presented using LIGA micro-machined process. The K-and Ka-band filters show wide bandpass characteristics of~36% and ~39% with the insertion loss 1.26dB at 19.11GHz and 1.7dB at GHz, respectively. These filters can be applicable in high power MMIC of MIMIC.

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A 90-day repeated-dose oral toxicity study on Flos lonicerae extract in Fischer 344/N rats (금은화(Flos lonicerae) 추출물의 Fischer 344/N 랫드를 이용한 90일간 반복 경구투여 독성시험)

  • Han, Zhong-Ze;Zhang, Hu-Song;Kang, Sang-Chul;Gil, Ki-Hyun;Kong, Kwang-Han;Kim, Do-Hyung;Ahn, Tae-Hwan;Bae, Jin-Sook;Go, Hyeon-Kyu;Han, Myoung-Kyu;Kim, Hak-Soo;Heo, Hyun-Suk;Park, Eun-Mi;Song, Si-Whan;Kim, Kap-Ho;Park, Chan-Koo;Lee, Hyun-Kul
    • Korean Journal of Veterinary Research
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    • v.48 no.4
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    • pp.401-411
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    • 2008
  • This study was performed to evaluate repeated-dose oral toxicities of Flos lonicerae extract in Fischer 344/n rats. Flos lonicerae was administered orally to rats at dose levels of 0, 37, 111, 333, 1,000 and 2,000 mg/kg/day. Each group consisted of 10 rats of each gender. The Flos lonicerae extract was given once a day, 5 times a week, for 90 day repeatedly. This study was conducted in accordance with the Protocol of Korea National Toxicology Program and The Standards of Toxicity Study for Medicinal Products. In the present study, there were no toxicologically significant changes in mortality, clinical signs, body weight gains, ophthalmoscopy, urine analysis, hematology, serum biochemistry, necropsy findings, organ weights, histopathology, estrus cycle and sperm examination of all animals treated with Flos lonicerae extract. These results suggest that the oral no observed adverse-effect level of the test item, Flos lonicerae extract, in rats is higher than 2,000 mg/kg/day in both genders. The target organs were not established.

Introduction of the Korea BioData Station (K-BDS) for sharing biological data

  • Byungwook Lee;Seungwoo Hwang;Pan-Gyu Kim;Gunwhan Ko;Kiwon Jang;Sangok Kim;Jong-Hwan Kim;Jongbum Jeon;Hyerin Kim;Jaeeun Jung;Byoung-Ha Yoon;Iksu Byeon;Insu Jang;Wangho Song;Jinhyuk Choi;Seon-Young Kim
    • Genomics & Informatics
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    • v.21 no.1
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    • pp.12.1-12.8
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    • 2023
  • A wave of new technologies has created opportunities for the cost-effective generation of high-throughput profiles of biological systems, foreshadowing a "data-driven science" era. The large variety of data available from biological research is also a rich resource that can be used for innovative endeavors. However, we are facing considerable challenges in big data deposition, integration, and translation due to the complexity of biological data and its production at unprecedented exponential rates. To address these problems, in 2020, the Korean government officially announced a national strategy to collect and manage the biological data produced through national R&D fund allocations and provide the collected data to researchers. To this end, the Korea Bioinformation Center (KOBIC) developed a new biological data repository, the Korea BioData Station (K-BDS), for sharing data from individual researchers and research programs to create a data-driven biological study environment. The K-BDS is dedicated to providing free open access to a suite of featured data resources in support of worldwide activities in both academia and industry.