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Case Report : A Case of Myopericytoma on the Lower Leg
( Jun Oh Paek ),( Ho Song Kang ),( Kwang Yeoll Yeo ),( Hee Joon Yu ),( Joung Soo Kim ) 대한피부과학회 2011 Annals of Dermatology Vol.23 No.2
Myopericytoma (MP) is a benign tumor composed of cells that show apparent differentiation towards putative perivascular myoid cells called myopericytes. It arises most commonly in the dermis or subcutaneous tissue of the extremities in adults. The most common presentation is a well-circumscribed, slow-growing painless firm mass. A 45-year-old woman presented with a 2-year history of a painless, slowly growing 0.9×0.7 cm sized firm mass in the subcutaneous tissue of the posterior side of the right lower leg. We presumed this lesion to be an epidermal cyst, pilomatricoma or calcinosis cutis and performed an excisional biopsy. The histologic examination showed that it was composed of spindle-shaped myoid-appearing cells in a concentric arrangement, intimately associated with thin-walled vascular channels. Lesional spindle cells were diffusely positive for smooth muscle actin and were negative for CD34, desmin and S100 protein. From these findings, we diagnosed this lesion as a myopericytoma. (Ann Dermatol 23(2) 201∼204, 2011)
백준오 ( Jun Oh Paek ),이정우 ( Jung Woo Lee ),박경태 ( Kyoung Tae Par ),유희준 ( Hee Joon Yu ),김정수 ( Jung Soo Kim ) 대한피부과학회 2011 대한피부과학회지 Vol.49 No.5
Neutrophilic dermatosis of the dorsal hands (NDDH) is a recently described skin disorder regarded as a localized variant of acute febrile neutrophilic dermatosis (Sweet syndrome). The lesions of NDDH are characterized by erythematous plaques, pustules, and hemorrhagic bullae on the dorsal surface of the hands. Herein, we report a case of NDDH in a 52-year-old man with concomitant involvement of the ankle. The patient presented with well-demarcated erythematous papules, patches, and plaques on the dorsum of the hands as well as erythematous papules on the left ankle for 3 days. The lesions responded rapidly to systemic corticosteroid therapy. (Korean J Dermatol 2011;49(5):487∼490)
Thermally Stable Photo-Crosslinking Polymers Bearing Cinnamate Groups for Liquid Crystal Alignment
Sung, Oh Hyun,Cho, Seung Hyun,Kim, Whan Gun,Song, Ki Gook,Paek, Sang Hyon,Lee, Jun Young Wiley - VCH Verlag GmbH & Co. KGaA 2007 Macromolecular Symposia Vol.249 No.-
<P>Optically ansiotropic photo-crosslinking polymers were synthesized through reaction between different kinds of epoxy resins and cinnamic acids. Optical anisotropy of the polymer film exposed to linearly polarized UV light (LPUVL) was confirmed from the polarized UV-Visible spectra. The polymer films irradiated by LPUVL showed anisotropic absorbance in the polarized UV-Visible spectra, while the polymer irradiated by unpolarized UV exhibited isotropic absorbance. It was also confirmed that the polymer film exposed to LPUVL could align liquid crystals (LC). LC cell fabricated using the polymer films irradiated by LPUVL showed the anisotropic polar diagram, implying that the polymer films may be applied as the photoalignment layer for LC display.</P>
Case Reports : Achalasia treated by pneumatic dilatation in second trimester pregnancy
( Yu Chin Paek ),( Yoon Kyung Oh ),( Jung Ho Shin ),( Min Jeong Oh ),( Jun Yong Hur ) 대한산부인과학회 2010 Journal of Womens Medicine Vol.3 No.3
Achalasia is a rare motor disorder that is frequently associated with poor fetal outcomes and serious maternal complications due to severe malnutrition. Symptoms of achalasia include dysphagia, regurgitation, weight loss, nausea and vomiting. These symptoms may be mistaken for hyperemesis gravidarum in early pregnancy. We report a case of a 37-year-old pregnant woman who was treated conservatively as hyperemesis gravidarum at first, but later was diagnosed as achalasia with persistent symptoms and was treated by pneumatic dilatation. If symptoms of emesis persist after the first half of pregnancy, clinicians should suspect a possibility of achalasia. Pneumatic dilatation is currently the main treatment for achalasia in pregnancy because of lower risk, lower cost and good efficacy.
김현준 ( Hyun-jun Kim ),조명현 ( Myung-hyun Cho ),장지원 ( Ji-won-chang ),오현영 ( Hyun-young Oh ),백윤흥 ( Yun-heung Paek ) 한국정보처리학회 2020 한국정보처리학회 학술대회논문집 Vol.27 No.1
본 논문에서는 시스템이 비정상적인 상태에 진입하였는지를 판단하여 공격에 대한 탐지를 효율적으로 수행할 수 있는 하드웨어 기반 보안 모니터링 기술에 대해 소개한다. 먼저 이벤트 기반으로 커널을 보호하는 모니터링 기법들에 대해 알아볼 것이다. 최종적으로 다양한 이벤트를 유연하게 모니터링할 수 있는 기법을 살펴보고, 이를 바탕으로 보안 하드웨어 모니터링 기법의 향후 연구방향을 모색하고자 한다.