• Title/Summary/Keyword: Chosun

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Deep Neck Space Infection Caused by Keratocystic Odontogenic Tumor

  • Oh, Ji-Su;Kim, Su-Gwan;You, Jae-Seek;Min, Hong-Gi;Kim, Ji-Won;Kim, Eun-Sik;Kim, Cheol-Man;Lim, Kyung-Seop
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.36 no.2
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    • pp.73-77
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    • 2014
  • Keratocystic odontogenic tumor (KCOT) is a benign cystic intraosseous tumor of odontogenic origin. An infection of a KCOT is not common because KCOT is a benign developmental neoplasm. Moreover, a severe deep neck space infection with compromised airway caused by infected KCOT is rare. This report presents a 60-year-old male patient with a severe deep neck space infection related to an infected KCOT due to cortical bone perforation and rupture of the exudate. Treatment of the deep neck space infection and KCOT are reported.

Aggregation-induced photoluminescence enhancement of polymetalloles by energy migration (에너지 전달을 이용한 Polymetalloles의 응집에 의해 유도되는 광발광성의 증가)

  • Kwon, Hyung-Jun;Jung, Dae-Hyuk;Song, Jin-Woo;Jang, Seung-Hyun;Kim, Bum-Seok;Kwon, Yong-Hee;Cho, Sung-Dong;Sohn, Hong-Lae
    • Journal of Sensor Science and Technology
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    • v.15 no.5
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    • pp.303-308
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    • 2006
  • Aggregation-induced emissions of polymetalloles have been investigated since they are very attractive in their possible optoelectronic applications such as P-LED's and Sensors. Size of nanoparticulates was measured by using scanning electron micrograph and was about 200-300 nm. Phenylmethylpolysilane (PMPS) and polymetalloles emit the light at 360 nm and 520 nm, respectively. However, the aggregates of polymetallole containing PMPS exhibit an enhanced emission band at 520 nm, indicating that the energy transfer occurs from PMPS to polymetalloles in aggregates. Emission intensity of PMPS/polymetallole nanoparticulates at 520 nm increases depending on the aliquot of PMPS.

The Electrical Properties of $Ag_2Se$ Single Crystal ($Ag_2Se$ 단결정의 전기적 특성)

  • Kim, N.O.;Min, W.H.;Kim, B.C.;Chun, H.C.;Kim, H.G.;Shin, S.D.;Jang, S.N.;Lee, K.S.
    • Proceedings of the KIEE Conference
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    • 2003.07e
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    • pp.124-126
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    • 2003
  • The results of investigations of $Ag_2Se$ single crystal is presented. $Ag_2Se$ crystal was grown by the Bridgman method. The $Ag_2Se$ single crystal was an orthorhombic structure with lattice constance a=4.1686 $\AA$, b=9.0425 $\AA$, c=8.0065 $\AA$. Hall effect shows a n-type conductivity in the $Ag_2Se$ single crystal. The electrical resistivity values was $1.25{\times}10^3ohm^{-1}cm^{-1}$ and electron mobility was $-5.48{\times}10^3cm^2/V{\cdot}sec$ at room temperature(RT).

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Design and Fabrication of Light-guiding Plate for a Photobioreactor by Using Sunlight and Linear Fresnel Lens (태양광과 선형 프레넬 렌즈를 이용한 광생물반응기용 도광판 설계 및 제작)

  • Kim, Hun;Shin, Seong Seon;Hwang, Min Yong;Lim, Hyon Chol;Kim, Gwang Ho;Kim, Jong Tye;Jeong, Sang Hwa;Park, Jong Rak
    • Journal of the Korean Society for Precision Engineering
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    • v.30 no.2
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    • pp.143-147
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    • 2013
  • We present results of the optical design and fabrication of a light-guiding plate (LGP) for a photobioreactor by using sunlight and a linear Fresnel lens. LGP patterns were designed by optical simulations with an illumination design tool, LightTools, and fabricated by using a computerized numerical control machine. Optical characteristics of average deviation of illuminance distribution and light throughput efficiency were measured and compared with simulation results.