Park's 벡터 패턴의 왜곡률을 이용한 고정자 권선 고장 자동진단

宋明現(Myung-Hyun Song),朴奎南(Kyu-Nam Park),韓東奇(Dong-Gi Han),梁哲午(Chul-Oh Yang) 대한전기학회 2008 전기학회논문지 P Vol.57 No.2

In this paper, an auto-diagnosis method of the stator winding fault for small induction motor is suggested. 3-phase stator currents are sampled, filtered, and transformed with Park's vector transformation. After then Park's vector patterns are obtained. To detect the stator winding fault automatically, a distortion ratio is newly defined and compared with the one of healthy motor, and the threshold levels of distortion ratio are suggested. The 2-turn, 4-tum, 8-turn winding fault are tested with no load, 25%, 50%, 75%, and 100% rated load. The distortion ratio of the Park's vector patterns are increased as the increase of the faulted turns. but are same as the increase of the load.

주요 우울병 환자에서 Sertraline의 항우울 효과에 대한 임상적 연구

한오수,박종익,이철,이성동,박인호 울산대학교 의과대학 1994 울산의대학술지 Vol.3 No.1

As the psychopharmacological tool in the treatment of major depression, traditionally Tricyclic antidepressants has been used. But recently SSRIs(Selective Serotonin Reuptake Inhibitor) are introduced. They have the characteristics in that serotonin concentration would be elevated when receptors blocked by SSRIs, and they have less anticholinergic, antihistaminergic, antiadrenergic effect. We evaluated the antidepressive effect, side-effect and physiological effect of Sertraline in 20 Koreans, who were diagnosed as the ,ajor depression in DSM-Ⅲ-R criteria. Dosage was 50 mg, and total duration was 4 or 6 weeks. We have the result that the depressive symptoms were improved in terms of H.D.S(Hamilton Depression Scale) and B.D.I.(Beck Depression Inventory) including C.G.I.(Clinical Global Impression). Significant improvement was noticed after 2 weeks, and this effect was sustained in 4-6 weeks. side-effect was appeared, which were mainly gastrointestinal troubles including dyspepsia. anorexia, nausea, abdominal pain. But it was not the extent of stopping of the study. The physiological changes were not occurred. Generally we concluded that Sertraline has the antidepressant effect.

圓光醫大 附屬 第2病院 神經精神科 患者에 對한 統計的 考察(Ⅱ)

박민철,장광철,김상원,김한주,유미경,김훈,유용진,김현정,박남진,오상우,이귀행,노승호,백영석 圓光大學校 醫科大學 神經精神科學敎室 1992 圓光精神醫學 Vol.8 No.1

본 연구는 1986년 7월 11일부터 1991년 7월 10일까지 원광의대 부속 제2병원 신경정신과에서 의래 및 입원치료를 받았던 6,072명의 환자를 대상으로 병원 역학조사를 실시하고 그 결과를 1차조사 (박민철 등1986)와 비교했다. 1.전체 환자 중 남자가 54.4%로 여자보다 많았고, 이리와 이리 인접지역이 84.0%로 대부분의 지역을 나타났다. 의료보장상태는 보험환자가 57.1%, 의료보호환자21.8%, 일반환자 21.1%였으며 연령별로는 20대 24.6%, 30대 22.8%로 20대 30대가 절반정도를 차지했다. 2.외래환자에서는 신경중성장애가 46.0%로 가장 많고 정동장애, 경련성장애 순이며, 입원환자에서는 정신분열증이 30.5%로 가장 많고 기질성정신장애, 정동장애의 순이었다. 3.남자는 신경증성쟝애(23.4%), 정신분열증, 기질성정신장애 순이고 여자는 신경증성장애(39.9%), 정동장애, 정신분열증의 순이었다. 남자가 여자보다 많은 진단은 알코올정신장애(94.6%), 기질성정신장애, 소아정신장애 순이고, 여자가 남자보다 많은 진단은 정동장애(64.5%), 신경증성장애였다. 4.진단별 연령분포에서 신경증성장에는 30대(25.3%), 20대, 40대 순이고, 정신분열증은 20대(40.5%), 30대, 40대 순이며, 정동장애는 20대, 30대, 50대 순이나 비교적 비슷한 융이었다. 5.진단별 발병연령에서 신경증성장에는 20대, 30대가 절반이고,정신분열증은 20대(51.3%), 10대, 30대 순이며 정동장애는 20대(30.7%), 30대, 50대 순이었다. 진단별 평균 발병연령은 신경증성장애 32.7세, 정동장애 36.1세, 정신분열증 23.6세였다. 6.진단별 이병기간은 2년이상이 신경증성장에 28.3%, 정신분열증 68.5% 정동장애 43.9%인데 전체적으로 41.0%였다. 진단별 평균 이병기간은 정신분열증 73.2개월, 정동장애 45.5개월, 신경증성장애 29.5개월이었다. We examined epidemiologic study of 6,072 patients who visited Wonkwang Neuropsychiatric hospital since July 11 of 1986 until July 10 of 1991 and compared this results with previous study(Park et al 1986). The study revealed as follows:1. Of total patients males visited this hosptial more than females as 57.1%, Most of them(84.0%) resided Iri and neighbouring Iri. In the point of insurance, insured patients, medicaid patients and uninsured patients were 57.1%, 21.8% and 21.1% respectively. On the distribution of age, the twenties, the thirties were 24.6%, 22.8% respectively and twenties and thirties were about half of total patients. 2. Of outpatients neurotic disorder was the most as 46.0%, secondly mood disorder and thirdly convulsive disorder, but of inpatients schizophrenia was the most as 30.5%, secondly organic mental disorder and thirdly mood disorder. 3. Of males neurotic disorder was the most as 23.4%, secondly schizophrenia, and thirdly organic mental disorder, but of females neurotic disorder was the most as 39.9%, secondly mood disorder and thirdly schizophrenia. alcoholic mental disorder(94.6%), organic mental disorder, child mental disorder were mostly found in males,but mood disorder(64.5%) and neurotic disorder were mostly found in females. 4. On the distribution of age neurotic disorder was found the most in the thirties(25.3%), next in the twenties and in the forties, and schizophrenia was found the most in the twenties(40.5%), next in the thirties and in the forties, but mood disorder was found the most in the twenties, next in the thirties and in the forties but revealed similar rates relatively. 5. On the distribution of age of onset neurotic disorder developed nearly half during the twrnties and the thirties, schizophrenia developed mostly during the twenties (51.3%), secondly the teens and thirdly the thirties, but mood disorder developed firstly the twenties(30.7%), secondly the thirties and thirdly the fifties. on the average age of onset of illness neurotic disorder, mood disorder and schizophrenia were 32.7 years, 36.1 years and 23.6 years respectively. 6. On the duration of illness more than two years was 28.3% in neurotic disorder, 68.5% in schizophrenia and 3.9% in mood disorder and on the average duration of illness schizophrenia, mood disorder and neurotic disorder were 73.2 months, 45.5 months and 29.5 months respectively.

남자 노인에서 족관절 족저 굴곡근 신장운동이Functional Reach에 미치는 효과

권오윤,한명석,박동식 大韓再活醫學會 1999 Annals of Rehabilitation Medicine Vol.23 No.3

A STUDY ON THE EXPLOSION SAFETY ASSESSMENT OF HYDROCARBON REFRIGERANT REFRIGERATOR

Oh,Kyu-Hyung,Kim,Min-Kyu,Chu,Euy-Sung,Lim,Byung-Han,Kim,Man-Hoe,Park,Yoon-Ser 한국화재소방학회 1997 한국화재소방학회 학술대회 논문집 Vol.1997 No.-

This paper discribes an experimental explosion risk assessment study on refrigerators containing flammable hydrocarbon refrigerant. A refrigerator used in this study is a larder fridge type, 215 liter in volume. The hydrocarbon refrigerant used in the refrigerator is iso-butane(C<TEX>$_4$</TEX>H<TEX>$_{10}$</TEX>). For the explosion safety assessment of the refrigerator, temperature of compressor, cooling air circulation fan motor, defrost heater and inner lamp were measured during the operation. And to confirm the ignitablity of flammable gas by the electric spark of the switches of the refrigerator, ON-OFF test of all switches were conducted with compulsorily near the stoichiometric concentration atmosphere of iso-butane-air mixture. As the result of experiment above mentioned and another experiment for the explosion safety assessment, we can conclude that explosion hazard in connection with the use of hydrocarbon refrigerant was few.w.

韓國人의 食餌障碍의 疫學 및 性格特性

韓五洙,柳希姃,金昌潤,李哲,閔秉根,朴仁鎬 서울醫大 1990 精神醫學 Vol.15 No.4

DO,BOD농도 예측을 위한 인공신경망 이론의 적용

박성천,이한민,오창렬 동신대학교 환경연구소 2000 환경연구 Vol.5 No.1

최근 하천에서의 BOD, DO 해석뿐만 아니라 질소, 인 등의 영향을 고려한 부영양화 해석, 시간변동성을 고려한 비정상 수질해석, 2차원 및 다차원 수질해석, 수질에 대한 불확실도 해석 등 다양한 수질모의가 사회적으로 요구되고 있는 시점이다. 그러나, 수질 농도의 예측은 비선형적이고, 시변성이며 공간적으로 분포되어 있는 많은 어려움을 수반하고 있다. 본 연구는 영산강 유역의 중류부 대표지점이며 동시에 수질관리 대상지점인 나주지점을 선정하여 비선형적인 수질의 농도의 변화에 대한 모형을 개발하였다. 그 방법으로는 수계 내의 물리적ㆍ화학적ㆍ생물학적 반응 과정을 나타내지 않으면서 시행착오방법(trial and error method)으로 적절한 입력변수를 선택하여 인공신경 망의 역 전파학습알고리즘을 이용하여 DO와 BOD 수질농도에 대한 비선형 모형을 개발하였다. 그 결과 수질항목간의 상관계수는 0.850를 상회하고 있으며, 검증과정에서의 상관계수는 DO, BOD 각각 0.870, 0.887로 나타났다. 이는 수질보전정책 수립을 위한 기초 자료뿐만 아니라 하천의 치수 및 이수, 하천환경에 관련된 계획의 수립과 그에 따르는 운영 및 관리에 효율성을 더할 수 있을 것이라 판단된다. Resently various water quality simulations such as BOD, DO analysis at river, eutrophication analysis considering the effect of N, P, nonsteady water quality analysis considering time variation, two dimensional or multi dimensional water quality analysis, and uncertainty analysis of water quality etc. are needed by society. But the prediction of water quality concentration is difficult because of nonlinear, nonsteadiness, and spacial distribution. This research developed the model for nonlinear change of water quality density selecting Naju district, the representative district of Youngsan river and also the target district for water-purity. This model selected suitable input variable by trial and error method not showing physical, chemical, and biological reaction in river system and developed the nonlinear model for water quality concentration of DO and BOD using Back-propagation of artificial neural network. The correlation coefficient of each water quality item exceed 0.850 and DO is 0.870, BOD is 0.887. Conclusively this result will add to not only the basic data to establish the policy of water quality preservation but also the efficiency of the management following the establishment of the river environmental plan.

비엔나 검사총집의 임상적용을 위한 한국표준화 연구(II):서울 성인군에 대한 Standard Progressive Matrices 검사

한오수,유희정,김창윤,박인호,이철 大韓神經精神醫學會 1996 신경정신의학 Vol.35 No.1

본 연구에서는 서울 거주 중산층에 속하는 20대 남녀 대학생 96명, 20대 일반성인 111명 및 30대 일반성인 88명을 대상으로 하여 SPM 검사의 표준화 연구를 실시하였다. 재검사 신뢰도는 0.72였고 내적일치도 계수인 Cronbach alpha 신뢰도계수는 .79였다. SPM검사와 Wechsler지능검사와의 상관은 .30이었다. 이에 따라 본 연구결과 SPM 검사의 신뢰도 및 타당도가 통계적으로 유의하였다. 본 연구에서 남녀간의 성별차이가 없었음은 물론 기존의 외국에서 이루어진 전산화된 검사결과와 비교할 때 두드러진 문화적 차이도 나타나지 않았다. 20대와 30대간의 유의한 차이는 연령증가에 따른 지능저하의 결과로 해석된다. 문항반응이론에 기초하여 SPM 검사를 구성하는 문항을 분석한 결과, 쉬운 문항수가 많은 편이었으나 전반적으로 문항의 난이도, 변별력 및 추측도가 비교적 적절하였다. 본 연구결과, SPM 검사가 비언어적인 지능을 측정할 수 있는 문화적, 교육적 및 성차에 별로 영향을 받지 않는 유용한 검사임이 입증되었다. 앞으로 진행될 연구에서는 지필검사를 통해 전 연령층으로 확장된 규준을 작성하여 정상인의 지능평가와 동시에 정신지체, 뇌기능장애를 비롯한 다양한 환자집단은 물론 학교, 산업장면에서도 활용토록하며 신경심리학적 평가도구로도 임상에서 유용하게 활용해야 할 것이다. This study was aimed to standardize the standard progressive matrices(SPM) test in the PC/S Vienna test system. The SPM test was administered to 295 adults in Seoul, comprised of 96 university students, 111 adults of twenties and 88 adults of thirties. The test-retest reliability of the SPM with an interval of 2 weeks was found to be .72. The internal consistency reliability of SPM as computed by Cronbach alpha was .79. product moment correlation between the full KWIS score and SPM was .30. The reliability and validity coefficients of the test were statistically significant. No significant sex differences were observed in this study. And no significant cross-cultural differences were noted when comparing the computerized SPM results studied by Luxemburg and the results of this study. But significant age differences were found between twenties and thirties. The results suggested that increasing in age might be a key factor in lowering of intellectual functions to adults. According to the item analysis based on the item response theory, the results showed that the SPM consists of many easy items, but the average 'item difficulty', average 'item discriminaion' and average 'guessing' were in the moderate level. Conclusionally, the SPM test may provide a culture-free, verbal-free promising tool for the measurement of nonverbal intelligence in a Korean context. Future study will be extending to range of sampling to include all aged normal group, mental retardation, other patient groups and industrial setting. In the future, SPM will be used to neuropsychological test in clinical settings.

金屬薄膜導波管을 利用한 I/O Mode Filter

박한규,오한솔,김명수 연세대학교 산업기술연구소 1981 논문집 Vol.13 No.2

代表的인 3종류의 金屬薄膜導波管의 TEo-Mode와 TMo-Mode의 특성을 Computer Simulation에 의하여 비교 고찰하였다. 非對稱型平板薄膜導波管으로된 금속박막도파관은 TEo-Mode Filtering이 不可能하였다. 對稱型平板薄膜導波管으로된 금속박막도파관에서는 Film층과 그 외의 층과 굴절율 차이가 0.02 이하가 되면 TEo-Mode Filtering이 가능하며 TMo-Mode 의 損失이 10dB/cm이하가 되어 Mode Filter로서 使用可能함이 밝혀졌다. The typical three kinds of the Metal-Clad waveguides have been chosen, and the characteristics of TEo-Mode and TMo-Mode in them are investigated and compared with each other by computer simulation. TEo-Mode filtering has been impossible in the Metal-Clad waveguide made of the symmetric thin film slab waveguide. In the Metal-Clad waveguide made of the symmetric thin film slab waveguide, if the refraction index difference between the film layer and the other layers is below 0.02, it has made TEo-Mode filtering possible and has had TMo-Mode loss below 10dB/㎝. Therefore it has been improved that it can be used practically as a Mode Filter.

마우스에서 인삼 사포닌이 AST,ALT 활성도에 미치는 영향

박정오,최한영 서울保健大學 1993 論文集 Vol.13 No.1

It was attempted in the experiment to abserve the effects of ginseng saponin on AST, ALT and the biosynthesis of protein in liver extract of mice. The following results were obtained ; It was realized that the activities of AST(20~44%)and ALT(91~140%)were increased of 7 to 13 percent. Therefore, it was concluded from the above results that the ginseng saponin stimulated metabolism of amino acid and protein in the human body.