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유대현,최문기,오승환,권대근,전인철,손도경,박성원,Yoo, Dae-Hyun,Choi, Moon-Ki,Oh, Seung-Hwan,Kwon, Dae-Keun,Jun, In-Chul,Son, Do-Kyoung,Park, Sung-Won 대한악안면성형재건외과학회 2010 Maxillofacial Plastic Reconstructive Surgery Vol.32 No.6
Pilomatricoma or calcifying epithelioma is a benign tumor of hair follicle origin. Pilomatricoma presents a slowly enlarged and asymptomatic mass that located dermal or subdermal area. It showed mostly on face and upper limb and head and neck represents 50% of all case. And it developed almostly in the first 2 decade of life. Histologically, encapsulated mass composed of solid small basophilic cells and eosinophilic ghost cells. Surgical excision is the treatment choice and rarely recurs. The purpose of this article is to represent of pilomatricoma on subauricular region that treated with mass excision and local transpositional flap. Althrough the presurgical diagnosis of pilomatricoma may be difficult, clinicians must keep in mind the differential of head and neck masses that located subdermal layers.
방사선과 폐수산자원을 이용한 하수 농축슬러지 처리에 관한 연구
유대현,이재광,이면주,강호,Yoo Dae-Hyun,Lee Jae-Kwang,Lee Myun-Joo,Kang Ho 한국자원리싸이클링학회 2004 資源 리싸이클링 Vol.13 No.4
본 연구는 하수처리장에서 발생되는 농축슬러지의 처리방법에 대해 진행하였다. 방사선을 15 kGy 조사하였을 때 농축슬러지에 존재하는 일반세균 및 대장균을 99% 이상 제거, 유기물 분해등 소화조에서 일어나는 공정을 대체 할 수 있다. 폐수산자원인 불가사리를 가공하여 제조한 물리개량제를 첨가하여 응집공정의 효율을 높이고 아울러 함수율 10% 이상의 저감효과를 얻을 수 있다. This study was focused on the treatment of thickened sewage sludge. General bacteria and E. coli were disinfected over 99% and organic compounds were decomposed after irradiation. It was suggested that this process can be an alternative for digestion Process. The moisture content in sludge was decreased over 10% (w/w) and the coagulation of sludge particles was enhanced by irradiation at the dose of 15 kGy and addition of sea waste resource (star-fish) as a dewatering aid.
백서의 대망을 혈관경으로 이식하여 생성시킨 이차적 도서형 피판
유대현,탁관철,유재덕,Lew, Dae-Hyun,Tark, Kwan-Chul,Lew, Jae-Duk 대한미세수술학회 1996 Archives of reconstructive microsurgery Vol.5 No.1
The omental pedicle based on right gastroepiploic vessels is designed new experimental model for prefabrication(revasculirization) of skin flaps in rats. A $2.5{\times}4cm$ pack of omentum with right gastroepiploic vessels was transferred under a bipediceld panniculocutaneous flap which is $2.5{\times}8cm$ size. At day 7, all four margin was divided and the flap was rasied as an secondary island flap connected only by its vascular pedicle, then the composite flap sutured back in place. The flap perfusion was examined by dermofluorometry and flap survival area was measured at day 12. The Secondary island flap demonstrated a dye fluorescence index(DFI%) of $31.38{\pm}12.33$ and survival rate $80.47{\pm}9.61$ The survival rate was increased when DFI% and contact surface between vascular carrier and skin flap was increased. An india ink injection and histologic examination provided visual evidence of revasculization. The omental pedicle is a promising and safe model for revasculirization of other tissues.
신경 회로망 벡터 양자화를 이용한 움직임 탐색 영역의 예측
유대현,김재창,Ryu, Dae-Hyun,Kim, Jae-Chang 대한전자공학회 1996 전자공학회논문지-B Vol.b33 No.1
본 논문에서는 동영상 압축의 핵심 기술인 움직임 벡터 추정에 있어서 신경 회로망을 이용한 벡터 양자화에 의해 탐색 영역을 예측하는 방법을 제안한다. 훈련영상을 입력으로 하여 전역 탐색법 등에 의하여 구해진 움직임 벡터를 이용하여 움직임 벡터 코드 북을 생성하고 이를 예측 탐색 점으로 이용한다. 움직임 벡터 코드 북을 생성하기 위해서 병렬 처리 특성과 다양한 학습 알고리즘을 갖는 신경 회로망을 이용하였다. 제안된 방법은 움직임 벡터들의 높은 공간적 상관성을 이용하게 되고 결과적으로 적은 탐색 점으로 움직임 벡터를 추정할 수 있으므로 계산량을 줄일 수 있을 뿐 아니라 움직임 벡터를 표현하기 위해 소요되는 비트 수도 크게 줄일 수 있다. 모의 실험을 통하여 제안된 방식이 기존의 고속 블록 매칭 알고리즘보다 우수함을 보였다. This paper presents a new search region prediction method using vector quantization for the motion estimation. We find motion vectors using the full search BMA from two successive frame images first. Then the motion vectors are used for training a codebook. The trained codebook is the predicted search region. We used the unsupervised neural network for VQ encoding and codebook design. A major advantage of formulating VQ as neural networks is that the large number of adaptive training algorithm that are used for neural networks can be applied to VQ. The proposed method reduces the computation and reduce the bits required to represent the motion vectors because of the smaller search points. The computer simulation results show the increased PSNR as compared with the other block matching algorithms.
유대현,박지훈,이용훈,이장훈,강선홍,Yu, Dae-Hyun,Park, Jihoon,Lee, Yong-Hoon,Lee, Jang-Hown,Kang, Seon-Hong 대한상하수도학회 2014 상하수도학회지 Vol.28 No.3
The residents' odor complaint is steadily increasing by odor causing from sewage system. A current drainage facilities and septic tank are included in the individual sewerage according to Sewerage Act. However, definitions and legal standards of drainage tank are insufficient. In addition, specifications and maintenance standards related to structure and size are not established. In this research, effect of drainage tank in individual sewage facilities on the odor occurrence was studied and the concentrations of $H_2S$ and composite odor were measured. From the measurements, the concentration of $H_2S$ and composite odor were 1 ppm ~ 5 ppm and 1.04 OU ~ 4.05 OU, respectively, before pump operation. Also, the concentration of $H_2S$ and composite odor were 5 ppm ~ 33 ppm and 5.10 OU ~ 35.04 OU, respectively, after pump operation. The concentration of SS in the effluent from drainage tank was ranged from 840 mg/L to 1,980 mg/L. These high concentration of SS seemed to be the major source of foul smell when high concentrated suspended solids in the public sewerage system were decomposed and then emitted. In this research, correlation coefficient ($R^2$) between $H_2S$ and composite odor before and after pumping were 0.925 and 0.918, respectively.
다발성 폐결절로 나타난 Behcet 씨병의 폐동맥염 1 예
유대현(Dae Hyun Yoo),정성수(Sung Soo Jung),최영춘(Young Chun Choi),이진(Jin Lee),안종훈(Jong Hoon Ahn),김성윤(Seong Yoon Kim),박성수(Sung Soo Park),이정희(Jung Hee Lee) 대한내과학회 1989 대한내과학회지 Vol.36 No.5
N/A Behcet's disease is known as a multisystemic disease caused by nonspecific vasculitis of obscure origin. Among the systemic manifestations, pulmonary involvement is know to be very rare and only a few cases have been documented. The most important features of pulmonary lesions in Behcet's disease are the fleeting nature of the pulmonary infiltrate and recurrent hemoptysis, which is often massive and fatal. We report a case of Behcet's disease manifested as multiple pulmonary nodules which was caused by pulmonary infarction as a result of pulmonary arteritis.
대학운동선수의 라이프스타일이 진로결정수준과 진로준비행동에 미치는 영향
유대현(Dae Hyun Yoo),여인성(In Sung Yeo),안병욱(Byoung Wook Ahn) 한국사회체육학회 2011 한국사회체육학회지 Vol.0 No.46
The purpose of this study was to examine the relationship among the life-style, career decision level, career preparation behavior for collegiate that helps the career decision and career preparation for collegiate athletes after graduating school and provides the basic actual proof data for creating program of career decisional preparation to coach. The subject of this study was selected using the convenience sampling method from chosen athletes population attending at the collegiate in Seoul and Kyoung-gi province. Of all those 500 respondents, 91 samples were deleted. At the result, a total of 409 samples was used for the data analysis. Through this process, the results were as follows: First, completism was negative influence to direction consultation. Second, style-pursuit was positive influence to direction conversation. Last, career decision level was positive influence to finding direction and direction consultation.