• Title/Summary/Keyword: Il Woo Lee

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Intraventricular Hemorrhage Caused by Lateral Ventricular Meningioma: A Case Report

  • Eun Ja Lee;Kyu Ho Choi;Si Won Kang;Il Woo Lee
    • Korean Journal of Radiology
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    • v.2 no.2
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    • pp.105-107
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    • 2001

  • Meningiomas causing intracranial hemorrhage are rare, and hemorrhage from a lateral ventricular meningioma seems to be even rarer. We report a case of trigonal meningioma in a 43-year-old woman who presented with intraventricular hemorrhage, and describe the CT, MRI and angiographic findings.

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Studying of the Effects of Atractylodes Japonica Extract on Th1/Th2 Cell-derived Cytokines (창출(蒼朮)이 천식 관련 Th1/Th2 세포 분비 cytokine에 미치는 영향)

  • Lee, Jeong-Woo;Rhee, Hyung-Koo;Jung, Hee-Jae
    • The Journal of Internal Korean Medicine
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    • v.28 no.4
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    • pp.681-693
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    • 2007

  • Background and Objective : Atractylodes japonica (AJ) is a commonly-used herbal medicine in Asian countries such as Korea, China and Japan. The present study was designated to evaluate the direct effects of AJ on helper T cell activities and on Th1/Th2 lineage development in vitro. Materials and Methods : Spleen cells from 8-week BALB/c mice were cultured in CR extracts containing medium without activation for 24 hours and with activation for 48 hours. CD4+ T cells were isolated and analyzed for mRNA expression levels of INF-$\gamma$, IL-4, T-bet and GATA-3 by RT-PCR and secretion cytokines levels of INF-$\gamma$, IL-2, IL-4, IL-5 and IL-10 by ELISA. Results : The results demonstrated that AJ had no mitogenic effects on unstimulated CD4+ T cells, but augmented CD4+T-cell proliferation upon activation with anti-CD3/anti-CD28 antibodies in a dose-dependent manner. AJ treatment significantly increased CD4+ T cell population and IFN-$\gamma$ expression was significantly enhanced, while IL-4 expression significantly decreased. In addition, in vitro Th1/Th2 polarization experiments revealed that AJ enhanced IFN-$\gamma$ secretion in Th1 cells, but reduced the IL-4 in Th2 cells in dose-dependent manner. Conclusion : These results suggest that AJ treatment could be a desirable alternative therapy for the prevention or correction of Th2 dominant pathological disorders, such as allergy and asthma.

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Applying Security Algorithms using Authentication Against Cyber Attacks in DAS Communication Network (배전자동화 시스템 통신망에 대한 사이버 공격에 대해 인증의 기법을 이용한 보안 알고리즘 적용방안)

  • Lim, Il-Hyung;Choi, Myeon-Song;Lee, Seung-Jae;Lim, Seong-Il;Lee, Sung-Woo;Ha, Bok-Nam;Hong, Sug-Won
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.57 no.3
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    • pp.327-335
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    • 2008

  • As communication is becoming increasingly prevalent and especially communication architecture is more relying on the open standard communication protocols, the security issues become major concerns. In this paper we consider possible cyber attacks in the applications based on the current distribution communication architecture, and then derive the security goals. Next we propose how the security algorithms can be adapted to achieve these security goals. We intend to adapt the most efficient ways of secure message exchange, taking the resource-constrained FRTUs into account Finally we show some experiments to validate the protocols.

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