위의 유암종과 선종의 병발 1례

장재식,강혁주,이중현,서영범,윤병구,김용섭,이구,서정일,양창헌,이창우,김정란,윤환중 東國大學校醫學硏究所 2000 東國醫學 Vol.7 No.-

유암종은 전신에 퍼져 잇는 장크롬친화성 세포에서 기원하는데 위의 유암종은 비교적 드문 질환으로 모든 유암종의 1.9~2.2%에 해당하며 위에 발생하는 종양의 1% 미만에서 보고되고 있다. 유암종은 일반적으로 증상이 비특이적이고 면역조직화학검사에 의해서 진단되기 때문에 과거에는 드물게 발견되었으나 최근 내시경 기기 및 술기의 발전과 검사 빈도의 증가 및 면역조직화학검사의 발달로 진단율이 증가 추세에 있으며, 드물지만 유암종에서 선암과 공존하는 예들이 보고되고 있다. 저자들은 심와부 동통을 주소로 내원한 70세 남자 환자의 상부위장관내시경 검사에서 위체상부의 대만곡에서 0.4×0.4 cm 크기의 중간 함몰을 가진 Yamada 1형의 용종과 함께 전정부의 전벽에서 0.8×0.5 cm 크기의 융기된 점막 소견을 보여 조직학적으로 각각 위유암종 및 위선종임을 확진한 후 내시경적 용종 절제술로 치료한 1예를 경험하였기에 문헌고찰과 함께 보고하는 바이다. Carcinoid tumors are arisen from enterochromaffin cells, which are scattered throughout the body. These tumors are composed of variable numbers of cells that contain endocrine granules in their cytoplasm, which can be identified by immunohistochemistry and electron microscopy. Gastric carcinoid tumors are relatively rare tumor, the reported incidence being 1.9~2.2% of all carcinoid tumors and less than 1% of all gastric tumors. Sometimes, composite carcinoid tumors and adenocarcinoma is reported. We experienced a case of the coincidence of carcinoid tumor and adenoma at the other site of the stomach in a 70 year old male patient. Gastrofiberscope showed 0.4×0.4 cm sized Yamada type I polyp with central depression on the greater curvature of the proximal body and 0.8×0.5 cm sized focal slightly elevated mucosa on the anterior wall of the antrum. The endoscopic biopsy specimens revealed carcinoid tumor and tubular adenoma with moderate atypism, respectively. The carcinoid tumor and adenoma were removed by endoscopic polypectomy. According to the follow-up gastrofiberoscopy after 7 month later, both lesions were nearly normal mucosa except whitish atrophic change after polypectomy.

환경보고서의 유용성에 대한 이용자의 인식에 관한 설문조사연구

장지인,김장환,정혜정 대한경영학회 2003 大韓經營學會誌 Vol.16 No.7

This study will develop the way of working out the more useful environmental report based on the result of the survey which was carried out in the companies currently publishing the report(publisher) and stakeholder(report user). At present, the number of domestic company which publishers the environmental report is quite few, however, its number will be expected to reach high in near future in the light of its importance. In the survey of usefulness of those environmental reports, 24 out of 25 report publishers and 18 out of 22 report users answered "useful". However, both of publishers and users pointed out the various points at issue of their points of views when they wrote and used the reports. First of all, the publishers usually make out the environmental reports based on the guideline out of the Ministry of Environment which is official recognized standard to help the publishers the consistency of the report and easiness of making out. However, the publishers also indicate controversial points of impeding the publisher's creativity due to its too much generalization. The users of those environmental reports present the problems of the impossibility of making comparison between entities due to the difficulties of the substance of the report, credibility of its objectivity and confidence, and lack of unified formation of report. The result of this survey is expected to be good reference for the development of the environmental report.

진화알고리즘과 퍼지시스템을 이용한 단기부하예측 시스템개발에 관한 연구

張右晳,李性穆,姜渙一 명지대학교 산업기술연구소 2006 産業技術硏究所論文集 Vol.25 No.-

This paper proposes a time series prediction method for the nonllinear system using the fuzzy system and the evolutionay strategy and the genetic algorithm. At first, we obtain the optimal fuzzy membership function using the evolutionary strategy or genetic algorithm. With the optimal fuzzy rules and its input differences, a better time prediction series system may be obtained. We obtain a good result for the time prediction of the short term electric load. In addition we implement the graphic user interface for the proposed algorithms.

Synthesis of 1,1′-Bis(1-Hydro-2,3,4,5-Tetraphenyl-1-Silacyclopentadienyl) [Ph4C4Si(H)-(H)SiC4Ph4] from Silole Dianion {[SiC4Ph4]2 2[Na+]}; Oxidative Coupling of Silole Dianion {[SiC4Ph4]2 2[Na+]} via Silolyl Anion Radical [HSiC4Ph4] [Na+] by Anhydrous H

홍장환 배재대학교 자연과학연구소 2019 自然科學論文集 Vol.30 No.1

Reaction of silole dianion {[SiC4Ph4]2[Na+] (1) with anhydrous hydrogen chloride (HCl) gas in THF at -78°C provides 1,1′‐bisbis(1‐hydro‐2,3,4,5‐tetraphenyl-1‐silacyclopentadienyl) [Ph4C4Si(H)‐(H)SiC4Ph4] (2). It is suggested that a reaction of the silole dianion (1) with hydrogen chloride immediately gives 1‐hydro‐silole anion {[H‐SiC4Ph4]‐•[Na+]} (3), oxidation of which by an additional hydrogen chloride provides the dihydrobissilole (2) via 1‐hydro‐silole radical {[H‐SiC4Ph4]•} (4).

퍼지시스템과 진화알고리즘 기반 지역부하예측 시스템개발

張右晳,指眩旻,姜渙一 명지대학교 산업기술연구소 2006 産業技術硏究所論文集 Vol.25 No.-

This paper proposes a time series prediction method for the nonlinear system using the fuzzy system and the evolutionay strategy and the genetic algorithm. At first, we obtain the optimal fuzzy membership function using the evolutionary strategy or genetic algorithm. With the optimal fuzzy rules and its input differences, a better time prediction series system may be obtained. We obtain a good result for the time prediction of the regional electric load. In addition we implement the graphic user interface for the proposed algorithms.

사진 현상용 확대기에서의 색보정 연구

이장원,백중환 한국항공대학교 1999 論文集 Vol.37 No.-

비디오 모니터를 이용한 사진현상용 확대기에서 디바이스간의 색보정 과정은 필수적이다. 본 논문에서는 표준 컬러 패치 필름을 인화한 은염 사진의 색과 필름을 반전시켜 비디오 모니터에 출력한 영상의 색의 두 색 공간을 정합 시키기 위한 색보정 알고리즘으로 최소자승오차법(Least Squares Error Method)을 이용한 1차와 2차 Curve Fitting 방식, 다항회귀(Polynomial Rrgression)를 통한 방식을 각각 적용하여 결과를 비교하였다. 적용한 색보정 알고리즘들 모두 약 50%까지 오차값을 감소시킬 수 있었다. 특히 적용한 방식들 중에서 최소자승오차법을 이용한 First-order Curve Fitting방식은 계산이 간단하고 오차값을 26.791까지 감소시켰다. Color correction proessing is essential in enlarger for photograph development using video monitor. In this paper, we appling First-order and Second-order curve fitting algorithm using least squares error method and polynomial regression method for color space matching photograph color developed from a standard color patch film with positive film image color in video monitor, then compare each results. All of the applied color correction algorithms, reduce the error value up to 50%. Especially the First-order curve fitting algorithm, least squares error method has a simple calculation, and reduces the error value up to 26.791.

필드버스의 성능측정에 대한 연구

박장환 한경대학교 2003 論文集 Vol.35 No.-

The evaluation of performance for fieldbus system is analysed in this paper. Generally the evaluation of performance exist both mathematical analyses of the model and the method of benchmarking for fieldbus system. In this paper method of benchmarking-analyses is proposed and the important parameter such as cycle time for profibus was tested in benchmarking-experiment.

<경제표>의 현대적 형식과 중농학파의 역할

박장환 경북대학교 경제경영연구소 2006 經商論集 Vol.33 No.1

윤곽검출용 CMOS 시각칩의 수평억제기능에 대한 해석

김정환,박대식,박종호,김경문,공재성,신장규,이민호 경북대학교 센서기술연구소 2002 센서技術學術大會論文集 Vol.13 No.1

排便 造影術에서의 正常値 및 非正常値의 分析

兪長壽,金相煥 대구산업정보대학 1998 논문집 Vol.12 No.2

This study was done to analysis of normal finding factors and abnormal finding factors of defecography by using fluoroscopy. The defecographic results were screened for the anorectal angle and perineal descent at rest, squeezing and during straing. Changes of rectal configuration and rectal canal width during straining were reviewed. Rectocele, rectal intussusception, and incontinence were observated. Contrast media of this study to make be very similar stool and before examination operators should explain methods of defecography to patient. Normal anorectal angle was measured to be 90˚, 80˚, 130˚ at rest, during squeezing, and straining respectively. In the spastic pelvic floor syndrome, increase of anorectal angle less than 10 degrees from rest to straining was observed. Incontinent patients had a large anorectal angle (mean 128˚)at rest. 7.8cm of perineal descent was found in descending perineal syndrome in comparison to 4.0cm in normal. Normal anal canal width was measured 1.4cm during straining but anal canal width in incontinenct patient was measured 1.2cm at rest. The anorectal angle was valuable in evaluation of spastic pelvic floor syndrome and fecal incontinence. In the cases of the rectoceles, anteroceles, and rectal prolaps, defecography is helpful in preoperative evaluation of rectal wall change and postoperative follow up.