소장 질환이 의심되는 환자에서 캡슐내시경과 CT 소견의 비교

이성수,홍성숙,김정훈,김연수,김진오,권석범,박성태,장윤우,최득린,권귀향 순천향의학연구소 2007 Journal of Soonchunhyang Medical Science Vol.13 No.1

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구조적 설계문제 최적화를 위한 혼합유전알고리즘

윤영수,이상용 한국경영과학회 1998 한국경영과학회지 Vol.23 No.3

Genetic algorithms(GAs) are suited for solving structural design problems, since they handle the design variables efficiently. This ability of GAs considers them as a good choice for optimization problems. Nevertheless, there are many situations that the conventional genetic algorithms do not perform particularly well, and so various methods of hybridization have been proposed. Thus, this paper develops a hybrid genetic algorithm(HGA) to incorporate a local convergence method and precision search method around optimum in the genetic algorithms. In case study, it is showed that HGA is able consistently to provide efficient, fine quality solutions and provide a significant capability for solving structural design problems.

전격성 경과를 취한 만성 호산구성 폐렴 환자 1예

윤호상,진춘조,유광하,이상엽,이수인,정상만,김선두,이순제,이길도,전혜정 건국대학교 의과학연구소 2000 건국의과학학술지 Vol.10 No.-

Chronic eosinophilic pneumonia(CEP) is a rare disease of unknown etiology characterized by chronic infiltration of the lung with eosinophils. It presents with profound systemic symptoms comprising fever, night sweats, weight loss, dyspnea and blood eosinophilia with nonsegmental air-space consolidation confined to the outer third of the lung, the "photographic negative of pulmonary edema". Histopathologic features of chronic eosinophilic pneumonia are intraalveolar and interstitial infiltrations with eosinophils, histiocytes, giant cells, scattered lymphocytes and plasma cells. Glucocorticoid therapy cause prompt resolution of symptoms as well as disappearans of blood eosinophils, elevated serum Ig E levels and the roentgenographic lesions. Infrequent radiographic findings include nodular infiltrates, consolidations, cavitations, atelectasis and pleural effusions. Deaths from CEP although rare, have been reported, but the majorities of CEP have benign courses and do not need a therapy with ventilator. We report a case of chronic eosinophilic pneumonia, which had a sudden course associated with diffuse pneumonic consolidations on the both lung and bilateral pleural effusion.

작업장 누적소음 노출과 혈압과의 관련성

이상윤, 김재용*, 임형준, 윤기정, 최홍렬*, 고상백**, 강대희, 조수헌 대한산업의학회 2001 대한직업환경의학회지 Vol.13 No.2

목적 : 작업장에서의 누적소음노출값과 혈압의 변화 사이의 관계를 관찰하기 위한 단면 연구를 시행하였다. 방법 : 소음발생 제조업체의 남성근로자 중 건강진단 자료, 설문지 자료, 인사기록이 모두 갖추어진 852명을 연구대상으로 하였다. 작업장 소음측정값은 34개 지점에서 측정된 작업환경 측정 보고서 값을 사용하였고, 혈압은 건강진단시 측정한 수축기 혈압과 이완기 혈압 각각의 평균을 이용하였다. 가능한 교란변수들을 건강진단시 설문조사를 통하여 조사하였다. 근로자의 근무기간과 근무했던 작업부서의 소음노출값을 이용하여 누적소음노출값을 추정하였고, 이에 따라 전체 연구대상 근로자를 저소음노출군, 중등도소음노출군, 고소음노출군, 과다소음노출군으로 구분하였다. 누적소음노출값으로 구분한 소음노출군 사이에 평균 수축기 혈압 및 이완기 혈압의 차이가 있는 지를 나이, 비만도지수, 혈중 콜레스테롤값, 고혈압의 가족력, 흡연력, 음주력 등의 가능한 교란변수들의 영향을 통제한 상태에서 비교하였다. 결과 : 가능한 교란변수들을 보정한 상태에서 저소음노출군에서 과다소음노출군으로 갈수록 수축기 혈압 및 이완기 혈압의 증가가 있는지를 관찰하기 위해 일반선형모델을 이용하여 분석하였을 때, 수축기 혈압 및 이완기 혈압 모두 소음노출군이 혈압 변화의 유의한 설명변수였고, 수축기 혈압 및 이완기 혈압 모두 저소음노출군에 비해 과다소음노출군이 각각 2.1 mmHg, 2.7 mmHg 만큼 높았다. 결론 : 이는 만성적으로 누적된 고소음에의 노출로 인하여 혈압 상승의 가능성이 있음을 시사한다. Objectives : The association of workplace cumulative noise exposure and blood pressure was investigated in this study using cross-sectional design. Methods : The study population comprised 852 manufacturing male workers of whom occupational health examination data, questionnaire and personnel records were available. Workplace ambient noise monitoring data was used for calculating individual cumulative noise exposure level. Mean of each systolic and diastolic blood pressure of occupational health examination data was used for individual systolic and diastolic blood pressure level. Possible confounding variables including family history of hypertension, smoking habit, alcohol drinking habit were collected by questionnaire. On the basis of job location and duration of work at the location, a cumulatlve time-weighted average noise level was calculated for each workers. According to this cumulative noise exposure level, each study subject was categorized as low noise exposure group, moderate noise exposure group, high noise exposure group, very high noise exposure group. Among noise exposure groups, mean of systolic and diastolic blood pressure was compared after adjusting possible confounding variables such as age, body mass index, serum cholesterol level, family history of hypertension, smoking history, alcohol drinking habit. Results : After adjusting possible confounding variables, noise exposure group was signnificant explanatory variables for both systolic and diastolic blood pressure, and mean of both systolic and diastolic blood pressure of very high exposure group was higher than that of low exposure group. Conclusions : These findings suggested that the high cumulative noise exposure might elevate the blood pressure.

NAC-5의 Sensitizer로서의 정량적 감광특성 연구

윤세훈,오성상,이의수 한국공업화학회 2003 응용화학 Vol.7 No.1

NAC-5(Naphthoquinone-1,2-diazide sulfonyl chloride), as an additive,was applied to enhance the photosensitive rate in composing a positive type of photoresist with naphthoquinone diazide derivative. Quantitative unit of energy absorotion of NAC-5 based on molar weight using 365 nm optical pattern generator was measured to estimate the availability as a role of photoinitiator or an improvement agent for photochemical reaction. Comparing with the ester compound of NAC-5 with THBP(trihydroxybenzophenone) the rate of energy absorption of NAC-5 in the given range of UV light exposure was greater then that of THBP-ester of naphthoquinone diazide. Conclusively, NAC-5 was regarded as superior in photosensitivity.

골반통증을 동반한 폐쇄신경 기원의 퇴행성 신경초종

이상욱,김두상,조현득,이창호,전윤수,이남규 순천향의학연구소 2007 Journal of Soonchunhyang Medical Science Vol.13 No.1

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방광 크롬친화세포종과 동반된 배뇨후 벼락두통

하윤석,강성진,허소영,이지현,김민정,김종국,김광수 고신대학교 의과대학 2009 고신대학교 의과대학 학술지 Vol.24 No.1

Thunderclap headache is a hyperacute, severe headache that is so named because the pain strikes suddenly and severely, and is sometimes a sign of a medical emergency. We report a case of pheochromocytoma in the urinary bladder in a 48-year-old woman who presented with recurrent thunderclap headache after voiding and exercise. So we think thunderclap headache during or immediately after micturition may be an important diagnostic clue of bladder pheochromocytoma.

주택임대차분쟁조정위원회의 도입과 운영방안 연구

尹惠楨,張成洙 서울大學校 環境大學院 2001 環境論叢 Vol.39 No.-

고혈압 환자들의 건강행태

김석범,강복수,윤성호,황정희,이경수 韓國保健敎育.健康增進學會 2000 보건교육건강증진학회지 Vol.17 No.1

This study was conducted to examine health behaviors in hypertensive patients and the factors that would affect these healthy life-styles, and to provide basic data for effective and continuous hypertension control in private medical facilities. Among those patients diagnosed as hypertension who had visited the Department of Internal Medicine of Yeungnam University Hospital during the two month period from August 2 to September 30, 1999, the present study included 222 patients who were in more than one month after the initial diagnosis of hypertension and those who had hypertension for less than 10 years. Using a structured questionnaire, the present study was conducted by a self-administered survey method, and the obtained data were analyzed with t-test, χ2-test and one-way analysis of variance using the SPSS statistical program. The scores on knowledge related to hypertension were higher as the education level of a patient was higher(p〈0.05). As for occupation, those who performed office or management jobs showed higher scores than those who were into manufacturing jobs, and as for economic status, although those patients who were in middle class showed highest scores, however, no statistical significance was observed. The scores of knowledge on hypertension was higher when the family history hypertension was present(p〈0.05). The scores of health-related behaviors were higher with higher education level and higher economic status, higher in those with family history of hypertension, and higher in those with office or management jobs than those who had manufacturing jobs(p〈0.05). Blood pressure measurement on regular basis was performed most frequently in those who were between 50∼59 years old with 83.3% and was least frequent in those who were older than 70 years old with 50%(p〈0.05). The frequency of regular blood pressure measurement was higher with higher education level, higher economic status, higher in those with family history of hypertension, and the highest in those with management position with 93.5%, however, on statistical significance was observed. Changes in health-relaxed behaviors after hypertension diagnosis were higher with higher education level, higher economic status, and in those patients performed office or management work. In particular, diet change was observed in female and higher economic status and smoking cessation was observed in 60∼69 years old. Housewives and office workers or managers have taken exercise more regularly and those who had management jobs and had high scores on knowledge related to hypertension would participate health education program more actively. Thus, for improving health-related behaviors for continuous management of hypertension, changes in health-related behaviors can be followed through conduction health education to improve understanding of knowledge related to hypertension as the method of helping to improve changes in health life-styles in those with little education and those in low economic status.

강관 보강된 전단벽 경계부재의 전단성능에 관한 실험연구

성수용,윤현도,정수영,장민수 忠南大學校 産業技術硏究所 1999 산업기술연구논문집 Vol.14 No.1

The purpose of this study is to investigate the begavior of concrete filled square stee ltubular boundary elements subjected to cyclic shearing force and constant axial force. Six boundary elements, with a/D=1.0,were tested to determine their maximum shear force and compare primary curve, energy absorption capacity and stiffness degradation. As a result, in the both high and normal strength concrete boundary elements, the larger the wall breadth to wall thickness ratio(D/t) of the steel tube,the more prominent the decrease in structural performance due to cyclic loading. In the boundary element with D/t=25, the crushing of tube concrete were accompanied by considerable lateral displacement,while in the boundary element with D/t more than 39, the lacal bucking of steel tube and the crushing concrete were accompanied by considerable axial shortening.