• International Journal of Aeronautical and Space Sciences
• /
• 제14권1호
• /
• pp.91-98
• /
• 2013

The rigorous requirements of modern spacecraft missions necessitate a precise attitude determination strategy. This paper mainly researches that, based on three space-borne attitude sensors: 3-axis rate gyros, 3-antenna GPS receiver and star-sensor. To obtain global attitude estimation after an information fusion process, a feedback-involved Federated Kalman Filter (FKF), consisting of two subsystem Kalman filters (Gyros/GPS and Gyros/Star-sensor), is established. In these filters, the state equation is implemented according to the spacecraft's kinematic attitude model, while the residual error models of GPS and star-sensor observed attitude are utilized, to establish two observation equations, respectively. Taking the sensors' different update rates into account, these two subsystem filters are conducted under a variable step size state prediction method. To improve the fault tolerant capacity of the attitude determination system, this paper designs malfunction warning factors, based on the principle of ${\chi}^2$ residual verification. Mathematical simulation indicates that the information fusion strategy overwhelms the disadvantages of each sensor, acquiring global attitude estimation with precision at a 2-arcsecs level. Although a subsystem encounters malfunction, FKF still reaches precise and stable accuracy. In this process, malfunction warning factors advice malfunctions correctly and effectively.

• 한국초등과학교육학회지:초등과학교육
• /
• 제31권4호
• /
• pp.436-449
• /
• 2012

This study aimed to investigate primary students' science-related attitudes through the literature review. Ninety-four papers published in domestic science education journals, since 1990, were collected and were followed by content analysis. In this study, science-related attitude was conceptualized as attitude toward science, scientist, science-related occupations, and school science, which is composed of cognitive, affective and behavioral domains. Based on the conceptualization, the instruments used for measuring students' attitudes were analyzed. The analysis of definition of science-related attitude in the articles showed different foci on cognitive, affective and behavioral domains. To suggest the effective instruction for enhancing students' science-related attitudes, this study identified students' attitude with gender, grade, residence and achievement level. The result showed that male, urban, higher-grade and better performed students had more positive attitude than female, rural, lower-grade and less performed students. As for the factors in science-related attitude, I categorized the factors into personal, environmental and pedagogical aspects, and found that psychological elements in all domains were most influential to students' change of science-related attitudes. It is interesting to note that students showed dichotomous views about experiment and that task-oriented instruction failed to enhance students' attitude. Based on the research findings, this study suggests effective instruction for improving students' attitudes and future research for science education.

• 한국생활과학회지
• /
• 제24권3호
• /
• pp.327-339
• /
• 2015

The purpose of this study was to investigate the relationship of family resilience, gratitude, and child-rearing attitude and to identify predicting factors of family resilience among mothers of young children. A correlative research design was be used for this study with self-administered questionnaires. The subjects were 248 mothers of young children from kindergarten located in Jeonnam and Gwangju provinces in Korea. Data were collected between May to June, 2013. Descriptive statistics, Pearson's correlation coefficient, and multiple regressions with PASW Statistics 18 (SPSS 18.0) program were used for data analysis. The major findings are summarized as follows: (1) Family resilience was closely related to gratitude and four types of child-rearing attitudes. Gratitude was closely related to four types of child-rearing attitudes. And rejective attitude had significantly negative relations family resilience and gratitude. (2) The significant factors affecting family resilience were mother's education level, gratitude, affective attitude, rejective attitude, autonomous attitude and controlling attitude which explained 63% of the variance. The results indicate that gratitude and child-rearing attitude were significant factors associated with family resilience among mothers of young children. In order to increase the family resilience among mothers of young children, family programs that deal with both gratitude and child-rearing attitude should be designed.

• 한국가정과학회지
• /
• 제9권3호
• /
• pp.23-36
• /
• 2006

The present study purposed to examine how the knowledge, consciousness and attitude affect life resources use of the subjects, first-year middle school students and their mothers, and ultimately, to provide basic materials for maximizing the effect of the education consciousness and attitude on environment-friendly life resource management in everyday living. The followings are the results of the analysis of the collected data. First, in the aspects of analysis of valiance in the general home environment factors of this research, there were some significance according to fathers and mothers' educational level, fathers' job, the type of a house about students and mothers' life resources use. Second, knowledge about middle school students' life resources use had negative correlations with attitude. But consciousness had positive correlations with attitude. Knowledge about their mothers' life resources use had negative correlations with attitude, but consciousness had positive correlations with attitude. The results of mothers were similar to those of middle school students. Mothers' consciousness and attitude had positive correlations with middle school students' consciousness and attitude.

• 한국초등과학교육학회지:초등과학교육
• /
• 제30권4호
• /
• pp.459-467
• /
• 2011

The purpose of this study is to find out the level of science teaching efficacy belief in the elementary school teachers and to find out the students' science process skills and scientific attitudes according to the level of the teacher's science teaching efficacy belief. After measuring science teaching efficacy belief of 109 teachers from nine elementary schools, three teachers who received the high score and three teachers who received the low score were selected from each 5th and 6th grade. Science process skills and scientific attitudes of 331 students who were in the selected 12 teachers' classes were measured. The results of this study were as follows; First, there were significant differences on the elementary school teachers' science teaching efficacy belief according to teacher's gender and career. The men's average score was clearly higher than women's average score on personal science teaching efficacy in science teaching efficacy belief according to teacher's gender. There was a obvious difference between the group of more than six-year less than ten-year and the group of more than fifteen-year less than twenty-year, the group of more than twenty-year on science teaching outcome expectancy in science teaching efficacy belief according to teacher's career. Second, there was not a evident difference on the elementary school students' science process skill according to the level of the elementary school teachers' science teaching efficacy. Third, there was a distinct difference on the elementary school students' scientific attitude according to the elementary school teachers' science teaching efficacy. There was a significant difference on the openness and the endurance in each scientific attitude. The level of science teaching efficacy belief in the elementary school teachers had few effects on the elementary school students' science process skill, on the other hand the level of science teaching efficacy belief in the elementary school teachers had an positive effect on the elementary school students' scientific attitude.

• Journal of Korean Biological Nursing Science
• /
• 제20권4호
• /
• pp.252-260
• /
• 2018

Purpose: This study aimed to investigate the relationships between the level of knowledge, attitude and compliance of preventive behaviors of the Middle East respiratory syndrome (MERS) among nursing students. Methods: The study sample consisted of 219 nursing students. Through the use of a structured questionnaire, data collection was conducted from June 1st to June 30th 2015. The descriptive statistics, independent t-tests and Pearson's correlation coefficient were employed to analyze the data. Results: The score of the MERS-related knowledge was 9.15 out of 13. The participants had a positive attitude toward the MERS. The level of MERS-related knowledge was high in the case of temporary school closure or break in clinical practice because of the clinical training in hospitals that MERS occurred (t= 2.42, p= .016). The compliance level of the preventive behavior for MERS was high in female students (t= -2.11, p= .036), in the case of temporary school closure or break in clinical practice due to the clinical training in hospitals that MERS occurred (t = 3.29, p= .001), and in students that had MERS-related education for prevention (t = 2.80, p= .006). The MERS-related knowledge was positively correlated with the level of compliance for preventive behavior (r= .18, p= .009). Conclusion: To prevent MERS infection in nursing students, the level of knowledge on MERS should be enhanced so that they can practice preventive behaviors against it. Additionally, the MERS infection control education should include etiology and treatment products based on the MERS response guideline issued by the Centers for Korea Disease Control and Prevention.

• 한국영양학회:학술대회논문집
• /
• 한국영양학회 1994년도 춘계심포지움 및 발표논문 초록
• /
• pp.56-56
• /
• 1994

• 한국산업보건학회지
• /
• 제9권1호
• /
• pp.41-55
• /
• 1999

In order to evaluate the effects of knowledge, attitude and practice on noise-induced hearing loss or hearing threshold level, questionnaire survey was performed and hearing thresholds of 1 kHz and 4 kHz were measured on 1,040 subjects with workers exposed to noise, safety and health officers. industrial hygienists, analysts rind office workers. The results were as follows ; 1. The following 6 factors were obtained by factor analysis and factor rotation of 30 questionnaire of knowledge, attitude and practice about noise; knowledge of noise (F1), concern of hearing protective devices (F2), concern of noise induced hearing loss (F3), concern of noise level and hearing impairment (F4), concern of noise in workplace (F5) and recognition of noised-induced hearing loss (F6). 56.1% of variance was explained by 6 factors. 2. Significant variables influencing knowledge, attitude and practice about noise were education level and age in F1, personal protective devices (PPE) and education level in F2, age and education level in F3, education level, age and sex in F4, PPE, education level, age and work duration in F5, and work duration and PPE in F6. 3. Hearing thresholds of 4 kHz were significantly higher in workers exposed to noise than that of in the other subjects and tended to be higher in industrial hygienists, safety and health officers and analysts than that of the office workers. 4. Significant variables influencing hearing thresholds of 1 kHz were age, education level, F5 and F6 in workers exposed to noise, and F1 in industrial hygienists. 5. Significant variables influencing hearing thresholds of 4 kHz were age, F6, sex, work duration, F1, F5, F2 and F3 in workers exposed to noise, F1 and age in safety and health officers, and F6, sex and F4 in industrial hygienists. With the above results, it suggested that workers exposed to noise be needed the education of knowledge, attitude and practice about noise in hearing conservation program for the prevention of noise induced hearing loss. Also, it suggested that health managers in workplace be needed countermeasures to prevent hearing loss although they are intermittently exposed to noise.

• 한국생활과학회지
• /
• 제20권2호
• /
• pp.439-448
• /
• 2011

The purpose of this study was to investigate the influence of knowledge level on the perceptions and attitudes toward BSE(Bovine Spongiform Encephalopathy) and American beef. A survey was conducted with university students in a metropolitan area. Out of 590 questionnaires distributed, 481 were analyzed(81.5% response rate). The data was analyzed using SPSS windows(ver. 14.0). In evaluation of the BSE-related knowledge level, the average correct answer rate was 42.6%(the lowest 21.0% ~ the highest 64.9%). There were significant differences in perception and attitude based on the BSE-related knowledge level. In three groups of knowledge levels(top, middle, bottom), the bottom level group tended to be more concerned regarding the origin of beef than the top and middle level groups. Moreover, as the level of knowledge increased, people tended to consider American beef safe. In their attitude toward the government's move to re-import American beef, the top level group tended to think positively. On the other hand, the top level group had negative attitudes toward the media coverage of American beef. As the level of knowledge decreased, the rate of menu selectivity was higher. This research suggests that people need to be educated in BSE-related knowledge. Through the education of BSE-related knowledge, people will gain a more correct understanding and attitude towards American beef, which will help livestock and food service industries grow.

• 대한지구과학교육학회지
• /
• 제7권1호
• /
• pp.91-98
• /
• 2014

The purpose of this study is to compare scientific attitude and degree of satisfaction for school science lessons between science-gifted and general elementary school students. The results of analysis are as follows : 1. Scientific attitude of both groups appeared to be above average and especially science-gifted students demonstrated higher level of scientific attitude in all area. The characteristics of science-gifted tenacity, high motivation, and creativity are demonstrated in their scientific attitudes. 2. Degree of satisfaction about school science lesson for both groups was above average while science-gifted students showed higher degree of satisfaction than general students. 3. Correlation of scientific attitude and science lessons between science-gifted and general students were relatively low. Scientific attitude of science-gifted students are more dependent on other variables than those of science lessons.