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Vibration Diagnostic System for Steam Turbine Generators Using Fuzzy Interence (퍼지추론을 이용한 스팀 터빈 발전기의 진동 진단 시스템)

  • 남경모;홍성욱;김성동
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1997.04a
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    • pp.677-682
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    • 1997
  • Vibration diagnosis of steam turbine generator is essential for safe operation. For a fast few decades, several data base systems for diagnosis of steam turbine generators have been developed and proved useful. However, there still remains a problem in using data base systems such that they require an expert engineer who has a deep insight or knowledg into the system. Moreover,such data base systems can not give any information if the input is not completely fit with data base. This paper presents an effective method for vibration diagnosis of steam turbine generators using fuzzy inference. The proposed method includes also a strategy to overcome the drawback of data base system such that one cannot obtain any information when the input is insufficient or not exact. A computer program is written to realize the entire procedure for the diagnosis. Three realistic problems are dealt with to show the effectiveness of the proposed method.

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Knowledge Extraction of Highway Retaining Structure Selection: Characteristics of Knowledge Database

  • Song, Chang Young;Ryoo, Boong Yeol;Lee, Soo Gon
    • Architectural research
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    • v.4 no.1
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    • pp.45-52
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    • 2002
  • Selection procedures of earth retention systems are increasingly complex and directly related to the serviceability of the retaining structure selection systems since significant changes in earth retention technology motivates the review of design, and selection processes of earth retaining structures. Collection and classification of retaining structure selection knowledge are key issues because two expert groups, geotechnical and structural engineers, are mainly involved in the retaining structure selection. The course of natural tendency of expert knowledge are investigated considering the decision factors. The decision factors for selecting retaining structures are divided into four categories: application of the structure, and spatial, behavior, and economic constraints.

A Study on Process-Related Design Knowledge Management for an Auto Lever Indicator (오토 레버 인디케이터부의 프로세스 연결 설계 지식 관리에 관한 연구)

  • 김석도;김태수;이수홍;고희병
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2002.10a
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    • pp.925-928
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    • 2002
  • It is well blown that the product development time in manufacturing industry is critical. A new methodology for a product design knowledge management is required to reduce design errors and to optimize a design process. In this paper, Process-Related design knowledge management and Document Template are introduced to provide a design process to prevent previous design errors and a solution for the desist errors. Also the Document Template is more convenient interface in integrating the design knowledge into a system.

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Analysis of factors affecting the scaling experience of patients visiting the dental prophylaxis practice lab (치면세마 실습 대상자의 스케일링 경험에 영향을 미치는 요인분석)

  • Yun, Hyun-Kyung;Choi, Gyu-Yil
    • Journal of Korean society of Dental Hygiene
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    • v.13 no.6
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    • pp.961-967
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    • 2013
  • Objectives : The purpose of this study is to establish the regular scaling checkup service and to improve oral health care on the basis of knowledge, attitude, and belief by Dental Prophylaxis Practice Lab in A university. Methods : Subjects were 324 patients who visited Dental Prophylaxis Practice Lab in A university for the preventive removal of tartar from April to June 8, 2012. Data were analyzed using SPSS version 18.0 through the frequency analysis, chi-test, and logistics regression analysis. Results : In relation to scaling experience by age, 65.3% had experienced scaling checkup and those between 20 to 29 (34.7%) did not receive the scaling therapy. Smokers tended to have received more scaling experience than nonsmokers. Second, the number of untreated dental caries and missing teeth due to dental caries were important because the variables of oral health condition affected the scaling experience. Conclusions : It is necessary to increase the scaling experience and regular dental checkup by providing the education to improve dental clinics visit based on the knowledge and belief towards the scaling.

A study on job requirements and qualifications for catalogers in academic libraries (대학도서관 목록사서의 역할 및 자격요건에 관한 연구)

  • 정연경
    • Journal of the Korean Society for information Management
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    • v.14 no.2
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    • pp.143-163
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    • 1997
  • The purpose of this study is to find changing trends in roles and qualifications of catalogers by comparing and analyzing job advertisements from 1990 to 1997 and to suggest a direction of cataloging education based upon the trends. During the past years, the development of the information technology has influenced upon the duties of the catalogers and the requirements of the positions. Based upon the knowledg of traditional tools for classifying and cataloging, increasing needs for computer skills, networks, supervisiory skills, managerial skills, communication skills, research activities, and ability to adapt the changing environment were required for the catalogers. If s time to prepare a new cataloging education that produce excellent catalogers for the future.

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Reliability Analysis of Solar Radiation Resources Data in Korea (국내 태양에너지 자원 데이터의 신뢰성 분석)

  • Jo, Dok-Ki;Yun, Chang-Yeol;Kim, Kwang-Deuk;Kang, Young-Heack
    • 한국태양에너지학회:학술대회논문집
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    • 2011.04a
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    • pp.63-67
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    • 2011
  • KnowledgThe Korea Institute of Energy Research(KIER) has begun collecting horizontal global insolation data since May, 1982 at different locations. Because of a poor reliability of existing data, KIER's new data will be extensively used by the solar system users as well as by research institutes. But the quality of solar insolation data is not always good. This reports on an attempt to identify systematic error in such data using clear-day analysis for data rehabilitation. Clear-day analysis is successful in uncovering solar insolation data of questionable quality. It is not proven that rehabilitation process can improve the quality of data for daily or monthly means, but it is suggested that the method can be used to improve the quality of data for monthly means of several years for use in many applications of solar energy plarming. Earlier studies finding a maximum ETR of about 0.80 are confirmed.

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AIDS Related Knowledge and Attitudes Among School Nurses in Chonbuk Province (전북지역 양호교사의 AIDS 관련 지식과 태도 조사연구)

  • 정영숙;문영희
    • Korean Journal of Health Education and Promotion
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    • v.11 no.2
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    • pp.33-47
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    • 1994
  • AIDS preventional efforts need to be guided by well trained health care personnel especially by school nurses for the adolescents. This study was designed to get basic data about AIDS educational program development for school nurses. The objectives of this study were to 1) identify AIDS knowledg of school nurses 2) identify AIDS attitudes of school nurses and 3) identify association between AIDS knowledge and sociodemographic characteristics. Data were collected from 173 subjects in Chonbuk province. Self-reporting questionnaire were administered during the period from 1st of June to 30th of June, 1994. AIDS related knowledge was measured by using 44 questions on cause(3 items), testing(3 items), mode of transmission(15 items), clinical manifestations(5 items), treatment(3 items), prevention(5 items), complication(4 items), infection control(3 items) and Using resources(3 items). AIDS related attitudes were measured by five point Likert scales using 13 questions on perceived threats from AIDS crisis (4 items), perceived severity to AIDS(2 items), perceived needs about psychosocial care for HIV infected patients(3 items) and perceived educational needs of AIDS(4 items). The collected data were analyzed by SPSS/PC/sup +/, using percentages, Mean and S.D. descriptive purpose and t-test or F for comparing the variables. The major findings were as follows: 1. Respondents ranged in knowledge of AIDS between 0 and 44 with the 33.79 mean score. Percentage of correctly answered respondents to each categories - mode of transmission : 87.0% - clinical manifestation : 85.0% - cause : 82.5% - prevention : 81.5% - treatment : 76.1% - infection control : 72.8% - testing of HIV infection 71.8% - using community resourses : 50.9% - complication : 45.8% 2. The respondents' attitudes of AIDS The majority(70%) showed higher perceived threat The majority(91.3%) showed higher perceived severity to AIDS crisis As a whole, perceived needs about psychosocial care for HIV infected patients negative The majority (over 96.5%) showed highly perceived educational needs of AIDS. 3. The relationship between AIDS knowledge and each of those general character. AIDS knowledge shows significant difference with age(F=3.50, p<.016), years of professional experience(F=4.14, p<.007) and received lecture about AIDS(F=4.54, p<.000). There was no significant difference between AIDS knowledge and job satisfaction.

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The Sexual Problem Behavior of the Primary School Students in a Region (일 지역 초등학생의 성문제 행동)

  • Kim, Hyeon-Ok;Park, Gwang-Sug;Jeon, Mi-Suk
    • Child Health Nursing Research
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    • v.13 no.4
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    • pp.486-494
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    • 2007
  • Purpose: This study was executed to investigate the route of the sexual knowledge acquisition and the sexual problem behavior of primary school students in a region. Method: The subjects of this research who were primary school 5, 6 grade students of 990 people were chosen at random in big cities, small towns and rural areas in Jeonbuk province. Result: The route of the sexual knowledge acquisition was through taking lesson & teacher in the school(40.6%), the peer group or senior member(26.1%), internet(15.3%), parents(10.0%), and multimedia(8.0%). The domain of the sexual problem behavior showed sexual impulse 3.8%, sexual violence 3.7%, masturbation 2.7%, voyeur 1.8%, prostitution 0.8%, transvestism 0.5%, exhibitionism 0.1%. The sexual problem behavior experienced by 5.0% or more of the subjects showed the experience of another person's compulsory touching on their body, the embrace desire and the kiss desire with opposite sexual friend. And the biggest sexual problem behavior of the subjects was sexual violence and sexual impulse to opposite sexual friend. The experience rate of the 6 grade was higher than that of the 5 grade (p<.05) and the male students' experience rate of another person's compulsory touching on their body showed higher than that of the female students(p<.05). Conclusion: The author through these findings suggests that systematic programs and curriculum should be developed for sexual problem behavior prevention.

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The Convergence Study on Dental treatment of related to the Major of University students (대학생의 전공계열이 치과진료에 미치는 융합적 연구)

  • Kim, Min-A;Jang, Hyun-Jung;Lee, Yeon-Kyoung
    • Journal of the Korea Convergence Society
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    • v.10 no.1
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    • pp.87-94
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    • 2019
  • This study aims to the effects for researching on dental treatment of related to the major of University students. Regarding the study results, female students took 4.63 times(health-related major) and 2.56 times(health-unrelated major) more than male students for dental treatments. On the other hand if they think their gum health is subjectively good enough they relatively took only 0.92 times(health-related) and 0.39 times(health-unrelated) than students who do not. Depending on the major the result of the dental treatment are different. Based on this study the dental treatment of convergence oral health education program for student of health-unrelated major shall be developed. Through this it is will have to be well-organized and correct oral knowledg that shoud be acquire appropriate dental treatments.

A Study on Primigravida's Antenatal Self-Care Behavior and Maternal Knowledge (초임부의 산전 자가간호 행위와 모성관련 지식에 관한 연구)

  • Park, Mi-Sook;Kim, Hae-Won
    • Women's Health Nursing
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    • v.6 no.1
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    • pp.153-165
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    • 2000
  • The antenatal self-care, one of antenatal management, was almost done by a pregnant woman herself. But It's especially difficult for primigravidas to cope with the change of being pregnant, and they also had insufficient knowledge of pregnancy, The purpose of this study was to serve as a basis for antenatal management, by grasping how much primigravidas performed antenatal self-care, how much they had maternity-related knowledge, and what factors affected those two factors. The subjects of this study were the primigravidas, selected from among visitors to a general hospital and a hospital for obstetrics and gynecology located in the city of K. A questionnaire survey was carried out over them from July 16 to August 19, 1998, to collect data. The test instrument used in this study for antenatal self-care behavior was one that modified the measurement instrument employed in studies by Kim Hae Won(1996), Lee Mi La(1984), and Yoon Young Mi(1994). Another one for maternity-related knowledge was Kim, Hae Won(1996)'s instrument. The collected data were statistically analyzed by SAS PC+. Frequency and percentage were calculated to find out the primigravidas' general characteristics, and the mean and standard deviation, rank were estimated to determine the degrees of antenatal self-care behavior and maternity-related knowledge, t-test and ANOVA were carried out to identify the general characteristic that affected antenatal self-care and maternity-related knowledge. and the relationship of antenatal self-care behavior to maternity-related knowledge was tested by Pearson correlation coefficient. The findings of this study were as follows; First, the age of the subjects ranged from 18 to 37, and their mean age was 26.43. Their mean gestational period was 24.87 weeks. 45% of the subjects were in the third-term pregnancy. Second, their total mean score in antenatal self-care behavior ranged from 94, the highest, to 36, the lowest. Its average score was 63.81(SD 9.98). The total mean score in maternity-related knowledge ranged from 20, the highest, to 1, the lowest, and its average score was 10.91(SD 4.59, 54.55 percent). Third, the general characteristics that gave impact on the primigravidas' antenatal self-care behavior were age, educational background, gestational period, experience of natural miscarriage, and experience of infertility test. A higher score in antenatal self-care behavior was gained by the primigravida group who had better educational background(F=3.29, p=.02), who was in the late stage of pregnancy(F=4.31, p=.01), who experienced a natural miscarriage(t=2.06, p=.04), and who went through a infertility test(t=-2.19, p=.04). Fourth, the general characteristics that had an influence on maternity-related knowledge were identified as the religion, the term of marriage, and the gestational period. A higher score in maternity-related knowledge was got by the primigravida group who had a religion(t=-2.02, p=.04), and who was in the late stage of pregnancy(F=5.77, p=.003). The term of marriage also made a significant difference(F=3.46, p=.02). Fifth, the relationship of the total mean score between antenatal self-care behavior and maternity-related knowledge was found to be at r=.37(p=.0001). In this study, an attempt was made to affirm the subjects' characteristics, the degree of their antenatal self-care behavior, and the extent of their maternity-related knowledge, to confirm what characteristics affected significantly primigravida's antenatal self-care behavior and maternity-related knowledge, and to verify that there was a relationship between the two variables. The meaning of this study might be backed up by the fact that its findings would serve as a basis for primigravida's efficient antenatal management in the future.

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