Equivalent Circuit Analysis of Induction Motors Considering Magnetic Saturation for Automotive Applications

Su‑Jin Lee,김성일,Pil‑Wan Han,김창업 대한전기학회 2020 Journal of Electrical Engineering & Technology Vol.15 No.4

This paper deals with the characteristics analysis of 3-phase induction motors for electric power steering applications by combining fnite element analysis with an equivalent circuit model. Induction motors for automobiles have high magnetic saturation due to size limitations. Accordingly, to improve the accuracy of the equivalent circuit analysis, it is necessary to consider the magnetizing reactance according to the magnetizing current. An equivalent circuit analysis method that takes into account the magnetic saturation of 3-phase induction motors is proposed and verifed through a test.

PLD 박막의 물리적 성질

한용진,조봉균,정재훈,이수빈,박해윤,이태기,채희백,홍진수 순천향대학교 기초과학연구소 1998 순천향자연과학연구 논문집 Vol.4 No.2

Thin amorphous carbon films were deposited by a Q-switched Nd;YAG 532nm with beam power density of ?? on the high purity graphite (99.7%). The pressure of vacuum chamber was ?? Torr. In order to estimate the quality of the Pulsed Laser Deposition films one of the most important optical properties, bandgap energy, was characterized by transmission and reflection in the range of the visible, and an optical direct bandgap energy of 2.45eV and indirect bandgap energy 0.36eV were obtained. Surface morphology of amorphous film was investigated by AFM (Atomic Force Microscopy). Its surface roughness is 70nm. Comparing our results with the published values in the literature we have confidence that our films show the good quality for optical properties.

會計分野에 있어 專門家시스템의 硏究開發動向 및 發展展望

韓振洙,朴廂圭 동국대학교 경영대학원 1992 經營論叢-東國大學校 經營大學院 Vol.16 No.-

뉴 밀레니엄시대 호텔경영의 발전방안

한진수 慶熙大學校 觀光産業情報硏究院 1999 觀光産業情報論集 Vol.1 No.-

The purpose of this study is to overview how to change hotel industry by new millennium circumstance. It was overview by 7 trend of hotel industry 1) technology 2) circumstance 3) hotel global 4) customer 5) emerging of new hotel & service 6) hotel management strategy 7) hotel marketing Millennium era will be technological advances, consumed pattern change, information by cyber generation, increasing knowledge management, and hotel operation change by computer which is express check-in and express check-out, guaranteed room service and in-room fax and modem connections. Those in the hotel industry who can offer services faster and more conveniently without diminishing quality. Moreover, The growing popularity of strategic alliances, partnership marketing, and co-branding efforts is further evidence of travel marketers' pursuit to lower transaction costs by lowering marketing costs.

초등학교 자녀의 구강보건에 관한 학부모의 인식 및 행동

한수진,문혁수,정재연,김영경,이병진,김은경,정혜련 韓國學校保健學會 2001 韓國學校保健學會誌 Vol.14 No.1

The purpose of this study was to collect basic data for the development of oral health education program of parents and to encourage their actual interest and participation in school oral health program. The authors surveyed parents' awareness and behaviors about the oral health of their children. The subjects in this study were 193 parents of elementary school children in Seoul. The collected data were analyzed, the obtained results were as follows: 1. Thirty-five percent of the parents investigated paid a regular visit to a dental clinic. The must common tooth brushing time among them was after dinner, the second was after breakfast, and this was followed by before bedtime and before breakfast. 2. Ninety-four percent of the parents responded that prevention is necessary, 92.2% had a plan to visit a dental clinic to prevent dental caries, and 60.1% experienced receiving pit and fissure sealants. Ninety-seven percent responded that they did check their children's dental caries. 54.9% chocked their children's oral status after tooth brushing. The parents who visit a dental clinic on a regular basis were more likely to check their children's teeth after tooth brushing than those who don't(P<0.05). 3. Eighty eight percent of respondents wanted to keep the fluoride mouth rinse program. 4. It is recommended that an oral health education program be developed for parents to visit dental clinics on a regular basis, to educate as to the right tooth brushing time, and to check out their children's oral status after tooth blushing.

밀레니엄을 맞이하는 1990년대 패션과 메이크업의 경향

韓明淑,金秀珍 服飾文化學會 1999 服飾文化硏究 Vol.7 No.6

This paper analyzes the trend of fashion and make-up in 1990s and their relevancy to each other. Based on the chronological analysis, we propose a new category for the fashion and make-up trend in 1990s, which is 1) traditonal ecology period(1990~1994), 2) versatile trial or decadent period(1995~1997), and 3) soft landing period based on the minimal neo-ecology and romanticism(1998~2000). Between 1990 and 1994, there was no differntiation in seasons. It appeared that spring/summer and fall/winter trend have had no big differences. At the beginning in 1990s, it was basically based on ecology concept that emphasizes the natural image. However after 1995, seasonal differences in trend are appeared and there were various make-up designs. The trends of spring/summer in 1996 could be named as color revolution period that emphasized the unique and individual expression of each person. In 1997, black, pastel, and brown colors were the result of reinterpreting the classic and sexy images of 1960s to natural and modernistic image of 1997. Purple color started to be introduced to us. In 1998, pastel tone, pink, and purple color expresses the glamorous look based on the romantic feminism, S/S of 1999 is mainly represented by minimalism, and avant garde. For fall/winter trends, brown color lines make-up comes to mix with romantic image and developed into wine, orange, neon colors in 1995 and 1996. These colors were the symbol of property and sentiment. Gold make-up emphasizing the eye area was the tendency of that period. In 1997, the fear of coming end of century was expressed as decadent image. At that time, ethnic and romantic image appeared with vivid color lines, gold, red and violet. In 1998, romanticism was popular again with modernism and ethnic mood. It expressed the romantic elegant image. The trend has retunred to the ecology mood again in 1999. This ecology is somewhat different from the previous ecology. It adds a sofistaiced feeling and sportic fashion. To express natural and sportic image, they choose pink blush. In coming 2000 as a new millennium, the yellow color will be main the stream to express vision, dream, and happiness in both fashion and make-up as an accent color. The minimal design and minimal tools will be used for the design and make-up, respectively. In addition, the fusion concept will dominate the fashion and make-up industry in the globalized and boundariless age. Through this paper, we hope that make-up can be accepted as a part of total fashion in its relationship with other elements such as shoes, clothes and accessory and that it can be considered as a independent art that has direct influence on people and industry.

도시 쉼터 노숙자의 정신장애 유병율과 삶의 질

한오수,홍진표,하지혜,이철,김창윤,이동우,박종익 大韓神經精神醫學會 2001 신경정신의학 Vol.40 No.5

연구목적 : 외환위기 이후에 급증한 노숙자 문제는 경제적인 상황의 호전에도 불구하고 만성화하는 경향을 보이고 있다. 쉼터의 노숙자를 대상으로 정신질환의 유병율과 삶의 질에 대한 조사를 시행하였다. 방 법 : 2000년 3월에 서울의 대표적인 쉼터에 거주하는 노숙자220명을 대상으로 인구학적 자료에 대한 설문조사를 한 뒤 Structured Clinical for DSM-Ⅳ(SCID-I)을 이용하여 AxisⅠ의 주요 정신질환을 진단하였다. 또 SmithKline Beecham Quality of Life Scale(SBQOL)를 사용하여 삶의 질정도를 평가하였다. 결 과 : DSM-Ⅳ AxisⅠ의 정신질환 중 기분장애, 정신병적 장애, 물질 사용 장애에 대한 진단 평가 결과 상기정신질환의 전체 평생 유병율은 73.6%, 현재 유병율은 59.1%이었다. 알코올 의존과 남용의 평생 유병율은 59.5%로 가장 높았고, 기분장애와 장애가 각각 39.5%, 3.6%이었다. 삶의 질은 노숙의 기간이나 실직 기간과 유의한 관계가 없었고, 자신이 지각한 건강상태, 자살과거력, 우울장애 유무와 통계적으로 유의하게 상관관계가 있었다(p<0.01). 결 론 : 노숙자에서 정신질환 중 알코올 장애의 유병율이 가장 높았으며, 우울장애가 있는 경우에 삶의 질이 저하되는 것으로 나타났다. Objectives : Homeless people surged after financial crisis tend to be chronic despite late economic recovery. So we tried to estimate prevalence of mental illness and quality of life of the homeless population living in shelter. Method : The study subjects were 220 homeless peoples who stayed at a shelter in Seoul around March 2000. Questionnaires on sociodemographic data were administered to the subjects, and then diagnoses of major DSM-Ⅳ Axis I mental disorders were made using Structured Clinical Interview for DSM-Ⅳ Axis I Disorders(SCID). And quality of life(QOL) was evaluated by SmithKline Beecham Quality of Life(SBQOL). Results : The lifetime prevalence of major DSM-Ⅳ mental disorders(mood disorders, psychotic disorder, and substance use disorder) of 220 homeless people was 73.6%, and current prevalence was 59.1%. The lifetime prevalence of alcohol dependence and abuse was highest, 59.5% and those of mood disorder and psychotic disorder were 39.5%, 3.6% respectively. Quality of life was not significantly correlated with duration of homelessness and unemploy-ment but marital status, self perceive health status, suicidal attempt history were significant factors. The quality of life in the people with mood disorders were estimated to be lower than those with any other diseases(p<0.01). Conclusion : Alcoholism was the most prevalent mental disorder in homeless people and mood disorder was negatively related to the quality of life scale.

첫 입원치료 받은 정신분열병 환자들의 삶의 질 추적 연구

한오수,이철,최지욱,홍진표,김창윤 大韓神經精神醫學會 1997 신경정신의학 Vol.36 No.6

울산의대 서울중앙병원 정신과에서 첫 입원 치료를 받고 퇴원하여 2년 혹은 5년이 경과한 정신분열병과 기타 정신병 108명 중 최종 73명(응답을 66%)을 대상으로 Heinrichs등이 고안한 삶의 질 척도(Quality of Life Scale)를 사용하여 현재의 삶의 질을 평가하여 다음과 같은 결과를 얻었다. 첫째, 삶의 질 측면 4가지 측면인 대인관계, 직업적 역할, 정신내적 요소, 및 일상적인 물건 및 행동 모두에서 삶의 질이 전반적으로 저하되어 있음을 관찰할 수 있었다. 대인 관계 영역 중 가족 구성원과의 인적 관계 항목은 다른 항목에 비해 상대적으로 만족도가 높았다. 둘째, 정신분열병군의 삶의 질은 기타 정신병군에 비해 대부분의 삶의 질 항목에서 유의하게 낮은 것으로 나타났다. 셋째, 2년 경과군과 5년 경과군 사이 삶의 질은 유의한 차이를 보이지 않았다. 발병 초기 삶의 질 저하가 상당기간 유지됨을 시사하였다. 넷째. 퇴원 후 삶의 질에 영향을 미치는 변인으로는 첫 입원 치료 기간이 유의한 역상관관계를 보였으며 또한 다변량 회귀 분석에 있어서도 같은 결과를 보였다. 이는 초기 치료에 대한 반응 정도가 부분적으로는 향후 삶의 질을 예측할 수 있음을 시사한다. 기타 첫 입원 당시의 연령, 교육 수준. 사회경제적 수준, 첫 입원하기까지의 이환 기간, 첫 입원 당시 Global Assessment of Functioning 입원 치료시 약물용량 등은 삶의 질과 유의한 상관관계를 보이지 않았다. Objectives : One object of this study is to provide a descriptive level of qua1ity of life(QOL) in a group of the first admired schizophrenic patients through interviews being performed after two or five yeah of fo11ow-up, and comparing them with patients in psychotic disorders other than schizophrenia. Another object is to identify clinical variables on the first admission which correlate to QOL factors, after two or five years of fo11ow up. Methods : A total of 73 subjects of the first admitted patients with schizophrenia(n=57) and psychotic disorders other than schizophrenia(other psychotic disorders group, n= 16) were selected. A Quality of Life Scale(QLS) measuring 21 items of life variables was used. Demographic and psychiatric data were obtained through medical records and psychiatric interviews. Results : Schizophrenia group(n=57) showed moderate decrease(mean 3.7 of 6) in all aspect of quality of life. However, the schizophrenia group displayed a relatively high score in relations with household members(mean=5.2) only among 21 QOL items. Comparison to other psychotic disorders group(n= 16), schizophrenia group showed a significant decrease in almost all aspects of QOL. No significant difference was obtained between the 2 year(n=27) and the 5year(n= 30) group. Duration of the first admission showed a significant correlation with current quality of life in the schizophrenic group. Conclusions : The significantly decreased score of quality of life suggests the need for careful observation and therapeutic concern for the early stage of schizophrenia. The schizophrenic group's relatively high score in relations with household members in this period may provide the importance of rehabilitation to improve their quality of life. Duration of the first admission may be a useful predictor of their subsequent quality of life.

Self-Leveling재의 최적 결합재비 산정을 위한 기초적 연구

김진만,조성현,조헌영,한기석,서정목 공주대학교 방재연구센터 1998 공주대학교 방재연구센터 논문집 Vol.2 No.-

Self-leveling material is the floor finishing material that is able to make surface level by itself, it can go on a next construction in a short time. Self-leveling materials are composed of various binders and chemical additions, and it is difficult to catch suitable mixing proportion of composion materials. This study is to investigate and analyze consistency and strength properties of according to component ratio of main materials and we endeavor to get suitable mixing propertion of binders by experimental design and statistical analysis. The results of this study are showed that suitable mixing proportions of binders are OPC(Ordinary Portland Cement) 70~80%, AC(Alumina Cement) 5~10%, AG)Anhydrous Gypsum) 5~20%.

창던지기 동작에 대한 운동학적 분석

장서진,남청웅,김한수 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.14 No.4

This study was conducted to investigate the technical structure of the javelin throwing and to improve the training and coaching. The subjects of this study were six male javelin throwers participated in the 81th national sports competition. The actual javelin event was taken by video camera. The analyzing factors were throwing angle, throwing velocity, throwing height, time, moving displacement of COG, segmental velocity and angle, rotating angle of the trunk. The conclusions were as follows. 1. It was showned that throng height was 85.6±3.9 and javelin was released to adquative degree, Among the athlets, S3 who had the best record was released the javelin with the fastelocity, but throw the javelin with the less releasing degree. 2. the longer distance the athletes record, the shorter time they had. the shorter time the athletes throw javelin, the longer distance they throw javelin. 3. It was showned that the displacement of the C.O.G of the vertical movement was small in phase 1 and large in phase 2, throwing movement. 4. It was showned that the velocity of the upper segment was faster in distal segment, and then athlets who had the best record was fast in upperarm and forearm but trunk.