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시멘트 종류별 콘크리트의 적산온도에 의한 강도예측에 관한 연구
장종호,나철성,김재환,김용로,길배수,남재현,김무한 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2
The purpose of this study is to exhibit fundamental data which can apply to quality and process management of structure concrete using special cement in the construction field investigating strength prediction by maturity method of concrete according to cement types. The activation energy value was derived from the experimental study that experimental factors were selected as W/C ratio of 45%, the kinds of cements of 3 levels of O.P.C, H.B.C, H.S.C and curing temperature of 3 levels of 5℃, 20℃, 35℃. Also, after investigating relationship between compression strength and equivalent ages of concrete according to cement types, the strength prediction was investigated by maturity method. As the above of results, differences between the prediction strength by strength prediction equation and the actual measurement strength were lower, therefore it is considered that the strength prediction by maturity method is possible not only concrete using normal portland cement but also concrete using special cement.
공간벡터 PWM의 과변조 영역에서 출력전압 선형화에 관한 연구
배장호,김연충,원충연 成均館大學校 科學技術硏究所 1999 論文集 Vol.50 No.1
This paper proposes a linearization technique for the space vector modulation method, which increases the linear control range of inverter up to the 6-step inverter. This method is based on fourier series expansion of the desired output voltage of the inverter to calculate the compensation angle in continuous switching mode and holding angle in discontinuous switching including the 6-step mode respectively. The numerical data of these angles which are used for compensation of fundamental voltage in overmodulation range. Therefore, it is possible to obtain the linear control and the maximized utilization of PWM inverter output voltage.
金彰昊,金日培 동아대학교 환경문제연구소 1991 硏究報告 Vol.14 No.1
Column that Packed with Montz Packings regularly and dumped Packing with Pall ring, Hiflow ring and Hackette have been represented high efliciency in Vacuum rectification and absorption. The new correlating of these relationships based on the numerous results has been developed for process calculation and design. The results of laboratory or experimental pilot plant can be adopted dircetly for scale-up.
분만 후 심한 저혈당이 동반된 림프구성 뇌하수체염 1예의 경과 관찰
손장명,고승현,안유배,주강,이정록,양성은,송기호,손호영,전정수 대한내분비학회 2003 Endocrinology and metabolism Vol.18 No.3
저자들은 출산 후 발생한 심한 저혈당을 주소로 내원한 31세 여자 환자에서 뇌 자기공명영상검사에서 뇌하수체종괴가 관찰되고 복합 뇌하수체 기능검사 결과전반적인 뇌하수체 기능저하증의 소견을 보여 림프구성 뇌하수체염을 진단하고, 호르몬 보충요법만으로 경과를 관찰하여 호전된 예를 경험하였기에 문헌 고찰과 함께 보고하는 바이다. Lymphocytic hypophysitis, an inflammatory disease of the pituitary gland that is often associated with pregnancy, is caused by autoimmune destruction of the pituitary gland evidenced by diffuse inflammatory cell infiltration of the pituitary gland and some kinds of detectable autoantibodies. We report a case of lymphocytic hypophysitis in a 31-year-old woman presenting with severe hypoglycemia and hyponatremia after delivery. Hormonal study revealed panhypopituitarism and magnetic resonance imaging with enhancement showed the bulging contour of the right side pituitary gland with an ill-defined mass-like lesion and nodular thickening of the stalk The patient's symptoms and biochemical data improved greatly with replacement of L-thyroxine and glucocorticoid. Partial recovery of panhypopituitarism was also seen. The follow-up tests revealed dramatic resolution of the pituitary lesion (J Kor SOC Endocrinol 1 8 : 3 25 -33 1, 2003).
만성정신질환자의 욕구에 대한 수요자(환자)와 공급자(치료자) 측면의 비교 연구
안강호,이종국,한은선,김명식,김장배,손봉희 대한생물치료정신의학회 2000 생물치료정신의학 Vol.6 No.1
Objectives : We performed this study to assess the needs of the chronically mentally ill(CMI) from the perspectives of the consumers(patients) and the providers(therapists) and to compare the differences between them. We also aimed to find met needs and unmet needs and then to determine the priority of the mental health services for the CMI. Methods : 165 patients and 19 therapists were examined with need assessment tool which had been developed by authors. Through statistical analysis, we evaluated the degree of problem, the degree of intervention, the relative degree of problem, and the degree of demand in each areas of needs, and compared the differences between patient group and therapist group. After then met needs and unmet needs from the perspectives of each group were revealed. Results : 1) There were differences in the assessment of needs between patients and therapists. 2) The more problem areas assessed by patients were finances, mental health, occupation, and leisure life in order of higher ranks. While occupation, leisure life, mental health, and finances were assessed as highly ranked problem areas by the therapist group. 3) Patients perceived that they were given more helps from others in the areas of mental health, physical health, accommodation, and relation to family than other areas. From the perspective of therapists, the areas of needs such as mental health, basic knowledge, occupation, and interpersonal retation were highly ranked intervention areas. 4) The demands for daily living skill, occupation, finances, accommodation were ranked highly by patient group. Highly demanded needs assessed by therapist group were mental health, occupation, interpersonal relation, and basic knowledge. 5) Unmet needs assessed by patient group were occupation, finances, and accommodation, while by therapist group, occupation. Conclusions : The needs of the CMI were assessed and identified by the consumers(patients) and providers(therapists) with the same tool. The differences between two groups were revealed. The most important unmet need of the CMI was occupation. These results can be used to plan the priority of mental health services and policies.
전호석,김준수,문영배,이재장 江原大學校 産業技術硏究所 2001 産業技術硏究 Vol.21 No.A
The separation of rare earths minerals is verb difficult because of their similar chemical properties. The rare earth minerals are used as the mixed rare earth minerals or the misch metal without separation to each element. However, the high purity rare earths are recently produced commercially to each element so they there are used as the materials for high tech. Based on the characterization results for the raw minerals, we have developed a combined process containing gravity seperation, magnetic severation and flotation. The result obtained from this study is monazite concentration of TREO grade 69.11% and Recovery 56.02%.