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제 1형 신경섬유종증 환자에서 발생한 위장관 간질종양 1예
원경준,이준,변유미,조민근,한경택,김원,홍란,임성철,김경종,김영대,박찬국,김만우 朝鮮大學校 附設 醫學硏究所 2007 The Medical Journal of Chosun University Vol.32 No.2
Gastrointestinal stromal tumor (GIST) is the most common non-epithelial neoplasm arising in the gastrointestinal tract, but this tumor is rarely seen in association with type l neurofibromatosis (NFl) Generally, the majority of GISTs are isolated neoplasm and they are sporadically found in the stomach, but the GISTs in NFl patients are usually multiple and usually found in the small intestine. We report a case of multiple GISTs in the jejunum of a 63-year-old woman diagnosed as NFl accompanied by complication of gastrointestinal bleeding, In this case, Patient had multiple cafe-au lait spots and neurofibroma on skin and had freckling on axilla and groin, and then, we made a diagnosis of NFl. Gastrointestinal bleeding is controlled by resection of multiple GISTs. Generally, only 3-5% of all gastrointestinal bleeding comes from the small bowel. Causes of small intestinal bleeding are angiodysplasia, neoplasm, NSAIDs induced ulcer etc. but, If patients have NFl accompanied by complication of gastrointestinal bleeding, GISTs on small bowel must be considered.
웨이브렛 계수의 공간적 유사성을 이용한 비디오 영상 압축
문종현,방만원 木浦大學校 應用科學硏究院 2001 應用科學硏究誌 Vol.1 No.-
This paper presents a wavelet-based compression and decompression algorithm using spatial similarities of video sequences. The simulation results show that the proposed algorithm provides high compression ratio with proper image quality. It also outperforms the previous Hilton's algorithm in an image quality, compression ratio and running time, leading to compression ratio less than 0.2bpp, PSNR of 32 dB and running time of 10ms for a standard video image.
박종현,박순영,방만원 木浦大學校 工業技術硏究所 1999 工業技術硏究誌 Vol.9 No.-
In this paper, we propose an efficient content-based image retrieval method using the color and wavelet based pattern features. The pattern features are extracted from the invariant moments of the high-pass band image through spatial-frequency analysis of wavelet transform and color features are extracted from color histograms of the global image. The proposed image retrieval method is called a pattern and color feature based query(PCBQ). Forward PCBQ and backward PCBQ perform similarity matching of cascade form using the pattern and color features. The first step matching is carried out to find the candidate images which are most similar to the query image using the pattern or color features. The second step matching is executed using the feature vectors for the accurate retrieval from the candidate images of the first step. Weighted PCBQ performs weighted similarity matching of parallel form using the pattern and color features. The experimental results show that the proposed retrieval systems yield more improved retrieval accuracy than the previous methods.
장종표,방만원,방상원 木浦大學校 情報産業硏究所 1996 情報産業硏究誌 Vol.4 No.-
객체 지향 방법은 많은 장점을 가지고 있지만, 지금까지 발전시켜온 전통적인 방법을 버릴수 없다든지, 객체 지향 기법의 전문가가 많지 않기 때문에 성공의 보장도 확실하지 않는 이유들 때문에 시스템 개발에 쉽게 수용 하지 못하고 있다. 구조적 분석 방법을 객체 지향방법으로 변환하려는 노력이 많아지고 있지만 정형화된 방법은 없다. 본 논문에서는 전통적인 구조적 분석 모델로부터 객체 지향 모델로의 변환방법을 검토하고 구조적 분석 모델, 즉 자료흐름도,자료사전,개체관계도 모델로부터 객체지향의 대표적 모델인 OMT의 객체모델로의 사상에 대한 새로운 방법을 제안한다.
韓國産 잎벌亞目(벌目)에 대한 系統分類學的 硏究 Ⅳ. 즐잎벌亞科에 대한 走査電子顯微鏡的 硏究
柳聖萬,崔元煐,李鍾郁 嶺南大學校 基礎科學硏究所 1993 基礎科學硏究 Vol.13 No.-
As a result of this study the Korean Selandriinae consist of 16 species, 7 genera including 4 newly recorded species, Strongylogaster macula, Aneugmenus temporalis, A japonicus and A. coronatus, from Korea.
편측 협응훈련에 의한 운동신경망의 재조직 및 교차훈련의 효과
박지원,김종만,서정환,김연희 한국전문물리치료학회 2002 한국전문물리치료학회지 Vol.9 No.3
We report the reorganization of motor network resulted from intensive unilateral coordination training and the effect of cross education on the untrained side in patient with traumatic brain injury using functional magnetic resonance imaging (fMRI). A 22 year-old male patient who had suffered from diffuse axonal injury for 58 months showed coordination deficit in the left hand at initial examination. Intensive motor training including complex finger movements and coordination activities using a metronome was introduced to the patient 4 hours per day for a week. FMRI was performed on a 3T ISOL Forte scanner. All functional images were analyzed using SPM-99 software. Hand function was improved after training not only in the trained lefr hand, but also in the untrained right hand. There was no activation in the right primary motor area (M1) during left hand movement before training whereas robust activation of left M1 was demonstrated by the right hand movement. Profuse activation of bilateral prefrontal lobes was seen during both hand movements before training. After training of left hand, right M1 became prominently activated during the left hand motion. The activation of bilateral prefrontal lobes disappeared after training not only for the left hand movement but also for the right, which clearly demonstrated the effect of cross education. This case report demonstrated the learning-dependent reorganization of the M1 and the effect of cross education.
네트워크 지연시간을 고려한 CAN 기반 피드백 제어시스템의 응답특성 분석
전종만,김대원 明知大學校 産業技術硏究所 2002 産業技術硏究所論文集 Vol.21 No.-
The paper analyzes the response characteristics of the system when considering the message delay time for a message transfer in a CAN-based control system. The message delay time is composed of a computation delay time and a communication delay time. The application layer of CAN communication is modeled in order to analyze two kinds of delay time mathematically and the communication delay is re-defined under the limited conditions. The CAN-based feedback control system is proposed as a target system that is the machining system with three axes. The response delay characteristics of the proposed system is analyzed through simulation and is improved by the compensation using the PID tuning method to meet the design specification of the system.
성인형 당뇨병 환자에서 피부생검을 이용한 표피하 모세혈관 기저막 두께의 변화에 관한 연구
김원학,오금탁,김만우,장경식,채종구,조건국 朝鮮大學校 附設 醫學硏究所 1987 The Medical Journal of Chosun University Vol.12 No.1
Thickening and proliferation of capillary basement membrane is a generalized phenomenon in diabetes mellitus and has been described in many organs including heart, kidney, pancreas, retina etc. While such changes are specific, it is difficult to obtain specimens from those organs. We took the specimens from the medial surface of the thing of 33 diabetics and 4 healthy persons as controls by means of punch biopsy. The measurement carried out by normogram and electron microscopic technique. HbA_(1c) values were also measured simultaneously. 1. The HbA_(1c) values are higher in diabetics than in control group (p<0.01). 2. The subepidermal capillary basement membrane thickness of the diabetics : 30% of the 5 th decade population, 53.9% of the 6 rh decade population and 83.3% of the 7th decade population showed more rhan 3,000 A. Whereas all the controls showed below 3,000 A. 3. The subepidermal capillary basement membrane thickness did nor increase significantly with the duration of the disease. 4. In cases of high subepidermal capillary basement membrane thickness, HbA_(1c) showed significant increase. (p<0.01).