• 한국항공우주학회지
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• 제36권12호
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• pp.1216-1221
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• 2008

본 논문에서 고려된 저궤도 위성은 고정형 태양 전지판을 가지기 때문에 낮구간(daylight) 동안에 태양전지판이 태양지향(sun-pointing) 자세를 유지하고, 관측 임무 수행을 위해 태양 전지판 방향과 반대방향에 위치한 탑재체가 지구지향(nadir-pointing)이 되도록 자세를 변경한다. 이 때 낮기간의 대부분을 차지하는 태양지향 자세에서는 위성 패널(panel)로 입사하는 외부 열환경 요인이 지구 복사열과 알비도(Albedo)이기 때문에, 비교적 안정적인 열환경 조건을 가지고 있다. 이에 반하여, 관측 임무를 수행하는 궤도 10% 정도의 지구지향 자세에서는 위성의 열환경 조건에 가장 지배적인 영향을 주는 태양광이 위성 패널에 영향을 준다. 비록 위성이 비교적 짧은 시간 동안에 지구 지향의 자세를 유지하지만, 이러한 열한경 조건의 변화 때문에 위성의 열설계에서 지구지향의 임무 자세에 따른 열적 영향에 대한 검토가 필요하다. 본 연구에서는 열해석 모델에 관측 임무 구간 동안의 지구지향 자세를 반영한 열해석 결과를 통하여 그 영향을 알아보았다.

• 한국치위생학회지
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• 제13권3호
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• pp.439-448
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• 2013

Objectives : The objective of this study is to investigate the work value factors and the professional attitude factors of dental hygienists and provide basic data for dental hygiene curricula. Methods : A total of 329 dental hygiene students in 4 universities completed the questionnaire which consisted of 15 questions for the work value factors and 10 questions for the professional attitude factors. Correlation between the work value factors and the professional attitude factors was analyzed. Results : The "students with no clinical practice experience (4.34 points)" were seen to be statistically significant (p= .013) in the work value factors, as compared to the "students with clinical practice experience (4.19 points)". In accordance with the grade level (p= .000), conformity in aptitude (p= .022), satisfaction level for the major (p= .000), desired duration of career (p= .009), and presence of recommendation for dental hygiene department (p= .000), the professional attitude factors had statistically significant differences. The higher the scores of the work value factors of dental hygiene students, the higher the scores of the professional attitude factors appeared, there by showing a positive (+) correlation (r= .367). Conclusions : For the cultivation of work value factors and professional attitude factors for dental hygiene students, it is necessary to improve the educational system that reflects the operation of a counseling and mentoring by the utilization of structured personality type testing tools and an improvement of interpersonal relationships.

• 한국항공우주학회지
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• 제30권3호
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• pp.46-56
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• 2002

본 논문에서는 플라즈마 펄스 추력기(PPT)를 사용한 우주 비행체의 자세 제어 가용성을 연구하였다. 전형적인 기체 추진 시스템에 비해 PPT는 높은 임펄스 특성을 갖고 있어 궤도나 자세 제어에 필요한 추진제의 질량을 적게 소모한다. PPT는 상대적으로 긴 작동 시간과 장착의 간편성 때문에 장기 작동을 요구하는 임무에 많이 적용되리라 기대된다. 소형 위성 시스템의 자세 제어를 위한 PPT의 적용 가능성을 실제 임무를 통하여 연구하였다. 고전적인 비례 미분 제어기와 퍼지 제어기를 적용해 보았고 점 더 유연한 임무 성능을 위해 연료 절감형 퍼지 제어기를 제안하였다.

• 한국식생활문화학회지
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• 제10권5호
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• pp.475-483
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• 1995

This study was undertaken to determine factors associated with infant feeding practices among highly educated Korean mothers living in Texas, USA and local populations. In both groups, infant's birth order, maternal age, prenatal education, husband's attitude, mother's attitude and infant's taking a bottle to bed were not associated with infant's feeding patterns significantly. However, there was a significant difference in initiating time for introduction of supplementary foods between Koreans and Americans. Thus Korean mothers introduced supplementary foods earlier than American counterparts. Furthermore the infant's feeding method among all participants affected the time for introducing supplementary foods significantly. Though attitude of Korean mothers toward breastfeeding was slightly more positive than that of American mothers, the prevalence of exclusive breastfeeding in Koreans was much lower than that in Americans. It might be suggested that effective nutrition education program for Korean subjects should be developed to practice breastfeeding from positive attitude and knowledge. It might be also suggested that participation of prenatal nutrition education involving fathers should be encouraged for promotion of rates of initiation and duration of exclusive breastfeeding of mothers.

• 한국의류학회지
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• 제32권9호
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• pp.1387-1396
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• 2008

The objective of this study was to identify differences between internet fashion shoppers and non-shoppers in their fashion shopping orientation and attitude toward internet shopping site service. Also behavior of internet shoppers and non-shoppers was compared by gender. Twelve hundred and ninety two responses were obtained from an online survey. 20 items were used to measure shopping orientation and 13 items to measure attitude toward internet shopping site service, which were modified from previous studies. Some demographics and internet familiarity were asked. Factor analysis, t-test, chi-square test, and regression were conducted. Factor analysis produced five fashion shopping orientation factors such as fashion oriented, shopping oriented, brand oriented, personality oriented, and value oriented. Attitude toward internet shopping site service were classified into three factors, at-site service, after purchasing service, and product information. Internet fashion shoppers and non-shoppers were significantly different in most items of shopping orientation and attitude toward internet site service. Internet shoppers were likely to be fashion oriented, to enjoy shopping, to pursue brandname and personality, and to concern price more than non-shoppers were. Internet shoppers also had more favorable attitude toward product information and at-site service. Also, shoppers were more familiar than non-shoppers to the internet in terms of duration of web-browsing. Ratio of men and women differed significantly for shopper vs. non-shopper groups. Female shoppers were likely to be more fashion, shopping. and value oriented but to have less favorable attitude for after purchasing service than male shoppers.

• Journal of Nutrition and Health
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• 제25권2호
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• pp.162-178
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• 1992

This study evaluated the effectiveness of affected-based program in changing the nutrition attitudes and behavior of a group of low-income housewives in a urban area near industrial complex. using pre- post- and one month retention test measures of nutrition attitudes knowledge and nutrition behavior. The sample consisted of treatment group(n=58) and control group(n=68, 66 or 61) The treatment group participated in a four-week nutrition course of eight hours offered by faculty members of department of Food and Nutition in Han Nam University. At the conclusion of the program the respondents had improved nutrition attitudes increa-sed nutrition knowledge and improved dietary diversity and dietary quality scores. Nutrition attitude scores rose significnatly from the pretest to post-test for the treatment group only However this improvement was not maintained one month after education. Nutrition know-ledge score of the treatment group increased significnatly from the pretest to posttest and pretest to retention test. Nutrition behavior was measured by food practice dietary diversity and dietary quality scores, The mean food practice score dietary diversity and dietary quality scores were signifi-cantly increased from pretest to posttest for the treatment group. Only dietary diversity scores was maintained from posttest for the retention test for the treatment group. There was a good correlation between nutrition knowlege and attitude scores at the pretest. However no significant corrlation was found between nutrition knowledge and attitude scores at the posttest. At the pretest nutrition knowledge or attitude and behavior were not correlated bu there were significant correations between nutrition knowledge or attitude and behavior at the posttest. It was concluded that a four-week nutrition education program of eight hours duration for the target people can lead to ac hange in dietary behaviors as well as nutrition knowledge and attitude.

• 모자간호학회지
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• 제2권1호
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• pp.55-69
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• 1992

This study was planned and carried out 1) to identify the general menstrual characteristics, 2) to understand perimenstrual discomfort, menstrual attitude, and sex role acceptance, 3) to investigate the correlation between perimenstrual discomfort, menstrual attitude, sex role acceptance in order to provide basic information about menstruation. The subjects of this study were 313 college women and they were asked to check Menstrual Discomfort questionnaire, Menstrual Attitude Questionnaire, and Role Acceptance Scale. Data were gathered from April 1 to June 24, 1992. The results were as follows : 1) The mean age of the subjects was 19, and the mean age of monarch was 13.6 ranged from 11 to 19. The distribution of menstrual cycle showed a wide variation and the mean cycle was 29.7 days. The duration of menstrual cycle was between 2-8 days, and in 65.8% the amount of menstrual fluid was within normal limit. 2) The frequencies of perimenstrual discomfort was 56.9% when asked to check it on 5 point scale. 3) All scores of perimenstrual discomfort were higher on premenstrual period than intermenstrual period, and higher on menstrual period than premenstrual period. They were statistically significant. 4) In general, the college women perceived menstruation as natural, somewhat bothersome, and not very debilitating or predictable, although they did not deny that menstruation had some effects. 5) The correlation between perimenstrual discomfort and menstrual attitude was significant. 6) The correlation between perimenstrual discomfort and sex role acceptance was significant. 7) The correlation between menstrual attitude and sex role acceptance was significant.

• 한국산학기술학회논문지
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• 제14권11호
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• pp.5785-5791
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• 2013

본 연구는 노인전문병원 간호사의 노인에 대한 지식, 태도 및 간호실천과의 관계를 확인하고 간호실천에 미치는 영향요인을 파악하기 위하여 시도되었다. 자료수집은 2013년 3월 17일부터 4월 20일까지 D시와 K도 노인전문병원 간호사 188명을 대상으로 하였다. 연구도구는 노인에 대한 지식, 태도 및 간호실천을 이용하였다. 자료분석은 SPSS와 Amos 프로그램을 이용하여 빈도분석, 평균과 표준편차, t-test, One-way ANOVA, Pearson's correlation coefficients, multiple regression analysis, 최대우도법을 이용해 분석하였다. 대상자의 노인에 대한 지식은 1점 만점에 0.49점, 태도는 7점 만점에 3.72점, 간호실천은 4점 만점에 3.54점으로 나타났다. 대상자의 연령, 총 임상경력, 최근 노인관련 교육 경험, 노인과 동거 경험에서 간호실천 차이가 있었다. 대상자의 노인에 대한 지식, 태도 및 간호실천은 정적 상관관계가 있었다. 노인간호 실천에 영향을 미치는 요인은 노인에 대한 지식, 태도, 최근 노인관련 교육 경험으로 나타났다.

• 지역사회간호학회지
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• 제16권1호
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• pp.59-67
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• 2005

This study was to investigate knowledge, attitude and the preventive behaviour of noise of workers exposed to harmful noise and to provide primary data for noise-exposed workers' hearing conservation and the prevention of noise induced hearing loss. Method: The subjects were 104 workers who participated voluntarily in the questionnaire. The instrument used in this study was knowledge, attitude and practice on noise-induced hearing loss tool by Rhee & Yi (1996). The data were collected from August to September, 2002 with a self-administered questionnaire. Data were analyzed by SPSS 10.0 win program for finding frequency, percentage, mean, standard deviation, t-test, and ANOVA. Results: The average age of workers was 35.9 and the current average year of working at the noise place was $5{\sim}$10 years. In the group of previous noise-exposed workers, they showed significant difference in preventive behaviors (t=4.087, p=.048). In the group of current noise-exposed workers, they showed significant difference in recognition and attitude of noise(F=4.707, p=.004). Also, the duration of wearing ear protection equipment(t=2.383, p=.019), the feeling of wearing ear protection equipment(F=3.602, p=.031) and comfortable sense of wearing ear protection (F=3.919, p=.023) was significant in the preventive behaviour of noise. Conclusion: Considering the results above, we can recognize that there are close relations among the knowledge, attitude and the preventive behaviour of noise. Therefore, it is necessary to develop education - programs for noise-exposed workers' better understanding of noise and preventive behaviors

• ETRI Journal
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• 제27권2호
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• pp.172-180
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• 2005

Image resampling according to epipolar geometry is an important prerequisite for a variety of photogrammetric tasks. Established procedures for resampling frame images according to epipolar geometry are not suitable for scenes captured by line cameras. In this paper, the mathematical model describing epipolar lines in scenes captured by line cameras moving with constant velocity and attitude is established and analyzed. The choice of this trajectory is motivated by the fact that many line cameras can be assumed to follow such a flight path during the short duration of a scene capture (especially when considering space-borne imaging platforms). Experimental results from synthetic along-track and across-track stereo-scenes are presented. For these scenes, the deviations of the resulting epipolar lines from straightness, as the camera's angular field of view decreases, are quantified and presented.