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RISS 인기검색어
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- 저자 : 백성호(Sung Ho Baek) (검색결과 6 건)
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백성호(Sung Ho Baek),김낙인(Nack In Kim),허충림(Choong Rim Haw) 대한피부과학회 1994 大韓皮膚科學會誌 Vol.32 No.2
Background : Livedo vasculitis shows variable clinical and histopathologic features according to its courses. There are also some discrepancies in histopathologic findings between the authors. Objective : Our purpose is to clarify the clinical and istopathologic feat tures of livedo vasculitis. Methods : We reviewed the clinical and histopathologic features in cluding direct immunofluorescence study and response to treigtment in eight patients with livedo vasalitis. Results : The ratio of males to females was 1:3 with female predusm nance. Age of onset was predominant, in young to middle-age, ranging from 19 to 64 years old. In seven patients skin lesions were aggravated during the summe, and in one patient during the winer. All patients had purpuric or telangiectatic lesions on the lower extremities. Painful ulcers developed in seven patients and some of the ulcers healed with whitish atrophic scars. Five patients had preceeding livedo reticularis. One patient had Raynauds phenomenoin and the other patients did not show alinormal findings related to the systemic diseases. Histopathologically, in two patients fibrinoid materi.il was deposited in the vessel walls mildly, and in six patients obviously with partial to complete obst,r iction of blood vessels. Extravasation of RBCs and thrombus formation were found clearly in seven patients, but in one patient these findings were observed in a mild degree. Endothelial swellings were obserrved in all patients. Perivascular infiltrations of mononuclear cells were also observed in all patients in various degrees. But only two patients with secondary bacterial infection showed neutrophil infilt ations or nuclear dusts. So, histopathologic findings are corripatible with lymphocytic vasculitis. The locations of predominantly affected vessels were variable. Direct immunofluorescence studies were done in six patients. Four of these patients showed positive findings. At least 4 months were needed for the complete healing of the skin lesions. Conclusion : Livedo vasculitis is chronic vasculit is aggravated in mostly summer. Most of the initial purpuric lesions progress to ulcers which is healed with whitish atrophic scars. Histopathoiogic findings suggest livedo vasculitis is a sort of lymphocytic vasculitis. (Kor J Dermatol 1994; 32(2): 245-252)
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Diphenylhydantoin에 의해 야기된 것으로 사료되는 낙엽상 천포창
백성호(Sung Ho Baek),심우영(Woo Young Sim),허충림(Choong Rim Haw) 대한피부과학회 1994 대한피부과학회지 Vol.32 No.4
Ae opposed to most other drug eruptions, drug-induced pemphigus may not develop for at least several months following the initiation of therapy with the offending agent. Unlike sporadically occuring pemphigus, the clinical and hietopathologic patterns of drug-induced pemphigus are most often those of pemphigus foliaceus. We report a case of diphenylhydantoin-induced pemphigus occuring in 30-year-old male with epilepsy. A few coinsized erythematous scaly patches developed on his fae, chest, snd left wrist, and two flaccid bullae on erythemstous base developed on his abdomen after three years snd nine months of therapy with diphenylhydantcin. Histopathologicslly, a biopsy specimin taken from a bullous lesion revealed that bulla is formed just beneath the granular layer and aeaitholytic cells are seen within the bulla. Direct and indirect irnmunofluorescence studies showed regitive findings. Administration of diphenylhydantoin was discontinued and he was treated with systemi and topical corticoeteroid. After 4 weeks, the skin lesions were healed with postinflammatory hysroigmentation and no new lesions were developed thereafter. (Kor J Dermatol 1994; 32(4): 724-728)
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배대성(Dae Sung Bae),김민수(Min Soo Kim),이순걸(Soon Geul Lee),조희제(Hui Je Cho),백성호(Sung Ho Baek),조기훈(Ki Hoon Cho) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11
Recently, industrial design requires the validation of multi-body dynamics, non-linear FE analysis, and test etc. However, the conventional DSA based approaches cannot be used in these disciplinary. Since a design problem related to the multibody dynamics and non-linear FE analysis is very complicated, their design sensitivity analysis process can be very tedious and difficult to find an optimized design within a limited time. So this represents that analytical design sensitivity is impossible in these areas. This is a sequential approximate optimization based on the meta-models such as Kriging and RSM etc. Since the sampling points for the meta model come from a D.O.E technique which has been very effective for a test field, its performance is very powerful. It generates the approximate objective function and solves the optimization problem using the ALM method. Then, a new design is given to analysis module. These processes are repeated until finding a tolerable design optimization. In this paper, a numerical example is introduced and it is optimized with the proposed algorithms.
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응용 및 융합 기술 : RF를 이용한 도로 가로등 원격제어시스템에 관한 연구
이광희 ( Kwang Hee Lee ),이성엽 ( Sung Yeob Lee ),백성호 ( Sung Ho Baek ),박재문 ( Jae Mun Park ),고봉진 ( Bong Jin Ko ) 한국항행학회 2014 韓國航行學會論文誌 Vol.18 No.5
본 논문에서는 RF시스템을 이용하여 도로 가로등의 자기제어와 수동제어에 대한 알고리즘과 제어시스템을 제안하였다. 자기제어 알고리즘에는 그룹제어와 개별제어가 있다. 그룹제어의 경우, 도로 가로등에 설치된 시스템의 물체감지센서를 통해 차량이 감지되면 RF신호를 송신하여 그룹별로 도로 가로등이 점등되며, 개별제어의 경우 도로의 갓길에 주차된 차량이나 사람을 도로 가로등이 인식하면 개별적으로 점등된다. 또한, 관리자가 RF신호와 각종센서를 통해 도로 가로등의 상태와 주변 환경도 점검 할 수 있는 수동제어 알고리즘도 있다. 따라서, 제안된 시스템을 통해 무의미하게 소모되는 에너지를 절감할 수 있으며, 도로 가로등의 유지 관리에 있어서도 편의성을 제공한다. This paper suggests the control system and algorithm for auto and manual control of the streetlightusing RF system. There are two control system in this auto control algorithm. One is group control, the other individual control. In case of group control, if a car is detected by the object detecting sensor of the system installed on the streetlight, it will turn on thelight per group by transmitting the RF signal. The streetlight turns on separately when it detects people or a car parked on the shoulder in accordance with the individual control. Also, there is manual control algorithm that manager can check surrounding environment and condition of the streetlight by RF signal and various sensors. So, not only the proposed system reduce meaningless energy consumption, but also it offers convenience regarding maintenance and control of the streetlight.
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