• International Journal of Aeronautical and Space Sciences
• /
• v.11 no.4
• /
• pp.303-312
• /
• 2010

This paper introduces the upper stage attitude control system of KSLV-I, which is the first space launch vehicle in Korea. The KSLV-I upper stage attitude control system consists of two electro-hydraulic actuators and a reaction control system using cold nitrogen gas. A proportional, derivative, and integral controller is designed for the electro-hydraulic thrust vectoring system, and Schmidt trigger ON/OFF controllers are designed for the reaction control system. Each attitude controller is designed to have enough stability margins. The stability and performance of KSLV-I upper stage attitude control system is verified via hardware in the loop tests. Hardware in the loop tests are accomplished for perturbed flight conditions as well as nominal flight condition. The test results show that the attitude control loop of KSLV-I upper stage is very stable and the attitude controllers perform well for all flight conditions. Attitude controllers designed in this paper have been successfully applied to the first flight of KSLV-I on August 25, 2009. The flight test results show that all attitude controllers of the KSLV-I upper stage performed well and satisfied the accuracy specifications even during abnormal flight conditions.

• Journal of the Korean Dietetic Association
• /
• v.4 no.1
• /
• pp.76-87
• /
• 1998

The purpose of this study was to examine the nutrition knowledge and attitude of the elderly for developing nutrition education program. The nutrition knowledge test was consisted of nutrition, nutrients, weight control, food safety, and shopping tips by developing the table of specifications. The nutrition attitude test was comprised of seventeen questions for invention, self-efficacy, control, and outcome expectation. A total of 140 elderly living at home responded to both nutrition knowledge and attitude test. According to the results of nutrition knowledge test, the mean was 13.3 at the maximum 18 points and 51.4% respondents got more than 14 points. Significant differences were found with age (p<0.05, $x^2$=21.46), charge of income (p<0.05, $x^2$=8.86) and monthly expenses(p<0.05, $x^2$=22.95). The results of nutrition attitude test showed that the mean value of 40.89 points at the maximum 51 points and 58.6% of respondents rated more than 40.89 points. In exploring the relationship between the demographic variables(sex, age, educational level, and monthly expenses) and for attitude concepts, a significant correlation was found. Correlation among the knowledge for nutrition, nutrients, and the attitudes for nutrition was significant(p<0.05).

• Korean Journal of Child Studies
• /
• v.25 no.3
• /
• pp.115-126
• /
• 2004

The purpose of this study was to examine the effects of Korean traditional music education for young children on the development of musical attitude and rhythmic sense of young children. The subjects were 42 four or five-year-old children enrolled in two classes of a public kindergarten. Half were in the experimental and half were in the control group. Instruments were "Music Interest Test for Young Children" (Kim, 2000), "Musical Attitude Rating Scale for Young Children" (Ahn & Han, 1999) and "Primary Measures of Music Audiation" (Gordon, 1986). The procedure included pre-test, treatments and post-test paradigm. Experimental group had Korean traditional music activities three times per week, including listening, appreciation, singing, playing traditional instruments and creative movement. The control group was merely provided with materials related to the Korean traditional music. Data was analyzed by t-test. Results indicated significant differences in music attitude and rhythmic sense between the experimental group and the control group.

• Journal of Science Education
• /
• v.38 no.3
• /
• pp.657-669
• /
• 2014

The purpose of this research is to investigate the effect of students' storytelling on the science learning motivation and science related attitude in elementary science class. We had developed storytelling materials for 11 class hours on the 'Heat transfer and our life' unit based on the analysis of the 4th grade-science curriculum. The research sample was 22 4th graders who were belonged to one of the classes at an elementary school in Gwangju. The test of students' science learning motivation and science related attitude were administered before and after the storytelling treatment, and the difference was checked by the paired t-test using SPSS program. Students' perceptions on the storytelling were also investigated. The conclusions of this research are as follows. First, the students' storytelling tend to have somewhat positive influence on learning motivation. The each mean of post-test in the domain of attention, confidence and satisfaction was significantly higher than that of pre-test. Second, students' storytelling have a positive influence on scientific attitude. Although the means of post-test were higher than those of pre-test in both science subject attitude and scientific attitude domain, a statistically significant difference was found only in the scientific attitude domain. For future researches, the development of more story-materials or strategies for effective storytelling is needed.

• Journal of Korean Elementary Science Education
• /
• v.23 no.1
• /
• pp.1-7
• /
• 2004

The purpose of this study is to analyze elementary school students' personality, scientific attitude and to find the correlation between elementary school students' personality and scientific attitude. To determine this, the distribution of sixth graders' personality and scientific attitude was examined and correlation between the lower categories of each one was analyzed. The test tools and the subject were decided through the two preliminary examination, personality test and scientific attitude test were investigated appling to a total of 354 sixth-grade students at eight elementary schools in this study. The test results were analyzed with averages, standard deviations, correlations, ANOVA using SPSS/PC/sup +/. The major results of analysis are as follows. First, the distribution of scientific attitude proved that the average of boys' curiosity was higher than that of girls' curiosity, but girls' average was higher than boys' average in criticalness property, cooperation property, preparation property, continuation property and patience property. The distribution of upper group and lower group in personality properties revealed that the ratio of upper group was higher than that of lower group in activity property, social property, but the ratio of lower group was higher than that of upper group in responsibility and reflective property. Second, the socio-populational variables affecting 6th graders' personality' and science attitude were a sex, a sibling order. The cognition variables affecting 6th graders' personality and science attitude were preference, extent of usability to practical life and interest of science. Third, analyzing the correlation between lower categories of personality and lower categories of science attitude revealed that activity property of personality rather highly correlated to willingness property, critical property at .399(p<.01), .351(p<.01) respectively. and that consideration property of personality highly correlated to curiosity, critical property at .451 (p<.01), .415(p<.01) respectively.

• Journal of the Korea Fashion and Costume Design Association
• /
• v.15 no.2
• /
• pp.43-56
• /
• 2013

The purpose of this study was to investigate adolescents' body esteem and clothing behaviors according to the sociocultural attitude toward appearance. The subjects were 750 adolescents in Daejeon and Chungnam province. The research method was a survey methodology and the measuring instruments consisted of sociocultural attitude toward appearance, body esteem, clothing behaviors, and subjects' demographics attributions. The data were analyzed by Cronbach's ${\alpha}$, factor analysis, cluster analysis, t test, $x^2$ test, ANOVA and Duncan's multiple range test, using SPSS program. The results were as follows. First, 2 dimensions(internalization and awareness) were emerged on the sociocultural attitude toward appearance, and adolescents were divided into 4 groups (unreceptive group, awareness group, internalized group, and receptive group) by the sociocultural attitude toward appearance. Second, there are some differences in adolescents' body esteem according to the sociocultural attitude toward appearance. Receptive group had the lower level on body esteem than unreceptive group. Third, there are significant differences in adolescents' clothing behaviors according to the sociocultural attitude toward appearance. Receptive group had the highest psychological dependency of clothing, clothing interest, clothing individuality, and clothing conformity among 4 groups.

• Journal of Nutrition and Health
• /
• v.28 no.2
• /
• pp.152-161
• /
• 1995

The purpose of this study was to provide a baseline assessment and relationship of nutrition attitude and food habit among mothers of middle school students. Eighteen questions were developed to test nutrition attitude and food habit test was used to reflect dietary behavior. The questionnare was mailed to a representative sample of nationwide middle schools, and was asked to be answered by mothers of one class' students. Usable questionnares were recieved from 4,694 participants of 99 schools. The mean score of nutrition attitude was 65.9 out of minimum possible score 18 and maximum 90. Nutrition attitude was weaker in the areas of control and self-efficacy than in intention and outcome-expectation. The mean score of food habit was 38.6 out of minimum possible score 12 and maximum 60. Food habit was weaker in the areas of protein, vitamins & minerals and dietary fiber than in the other areas. Nutrition attitude and food habit scores were lower among rural, manually working, lower educated and low-income mothers. There was a significant correlation between nutrition attitude and food habit(r=0.37, p<0.001).

• The Korean Journal of Elementary Counseling
• /
• v.5 no.1
• /
• pp.185-204
• /
• 2006

The object of this study is to inspect how much influence the play-based assertive training program has on the self-expression and learning attitude of elementary students. To perform this study, I set up two subjects of research. First, does the play-based assertive training program have influence on the self-expression improvement of elementary students? Second, does the play-based assertive training program have influence on the attitude of elementary students? I established 28 students in the third grade of K elementary school in Gongju City as experiment group for this research. In experiment group, 1 peformed play-based assertive training program in the class of discretion and extra-curricula activity twice a week and maintained the program for 6 weeks. By the standard of 12 times of performances, I put pre-test and post-test into operation. The major consequences revealed through above processes are followed: First, as the consequence of analyses of differences between pre-test and post-test about self-expression of experiment group adapted by play-using assertion training program, the level of self-expression was advanced meaningfully. Second, as the consequences of analyses of differences between pre-test and post-test about learning-attitude of experiment group adapted by play-based assertive training program, the level of learning-attitude was advanced meaningfully. Among 8 sub-fields of learning attitude, the field of superiority, accomplishment motives, concentration, self-study show statistically meaningful difference s respectively. The conclusion drawn from above consequences is that the play-based assertive training program is very effective in developing students' self-expression and attitude for learning.

• Journal of Korean Elementary Science Education
• /
• v.20 no.2
• /
• pp.281-291
• /
• 2001

The purpose of this study was to identify the effect of mind map activity on scientific attitude and science achievement in elementary school science. The subjects of this study were fifth-grade students selected from two classes in elementary school located in Seoul. The subjects were classified into two groups: One group is composed of thirty-eight students(experimental group) who were participated in mind map activity, and the other is composed of thirty-five students(control group) who were participated in traditional teaching situation. Pretest showed that there were no significant differences between experimental and control group in scientific attitude and science achievement. The results were as follows: First, the experimental group showed a significant improvement in the post-test science achievement compared to the control group. Second, the experimental group showed insignificant improvement in the post-test scientific attitude compared to the control group. Third, female students and mid-ranking group showed a significant improvement in the post-test science achievement. Fourth, in sex and academic ranking, experimental group did not show significant difference in the post-test scientific attitude. In conclusion, mind map activity was more effective than traditional teaching situation on science achievement. But mind map activity was less uneffective than traditional teaching situation on scientific attitude.

• Hwankyungkyoyuk
• /
• v.21 no.2
• /
• pp.11-24
• /
• 2008

This research verifies the effect on environmental attitude and knowledge accomplishment by t-test as producing and running programs regarding global warming which is raised as a representative environmental issue subject to 6th grade-elementary students. For this, environmental education programs about global warming for elementary students are developed and applied 15 times by reconstituting classes based on the contents regarding global warming from the text books revised as of 7th course of study. The result is as below. First, some part of contents from social study and science of 6th grade elementary curriculum of 7th course of study was able to be reconstituted to 15 education programs. Secondly, the programs about global warming improved students' environmental attitude Application of the programs about global warming showed significant difference(p<.05) on building environmental attitude as it proved those are effective on both area of recognition level and practice level. The method used on the test had .866's Cronbach alpha modulus value therefore, it obtained reliability. Thirdly, the programs regarding global warming improved students' knowledge accomplishment. As a result of test for knowledge accomplishment which was executed with same method for attitude test, the application of the programs about global warming showed significant difference(p<.05) on improving students' knowledge accomplishment on the global warming therefore, it resulted that the application of the program is effective on knowledge acquirement.