• Transactions of the Korean Society for Noise and Vibration Engineering
• /
• v.11 no.8
• /
• pp.338-348
• /
• 2001

A hybrid self-hearing motor, which Is a functional combination of general permanent magnet (PM) motor and hybrid active magnetic bearing(AMB), was proposed a few years ago. In this paper the hybrid self-bearing motor is modified to a disk type, in which one of two magnetic hearings was substituted for a thin yoke to make the system more compact. An outer rotors in this self-hearing motor is actively controlled only in two radial directions while the ocher motions are passively salable owing to the disk-type structure. Main advantages of the proposed self-hearing motor are simple control mechanism, low power consumption and smart structure. Mathematical model for the magnetic force Is built wish consideration of the radial displacement of the rotor. The model helps us not only to design a levitation controller but also to expect the system performance. Some experimental results show good capability and feasibility of the Proposed self-bearing motor.

• The Korean Journal of Elementary Counseling
• /
• v.6 no.1
• /
• pp.247-268
• /
• 2007

This thesis aims to examine the influences of self-regulatory group counseling on self-regulation and school life satisfaction of the higher grade students in Elementary school. To achieve this aim, the following research questions were posed: First, What kind of influence does the self-regulatory group counseling have on the self- regulation of the higher grade students in Elementary school. Second, What kind of influence does the self-regulatory group counseling have on school life satisfaction scale of the higher grade students in Elementary school. In order to verify these research questions, the self-regulation test and school life satisfaction scale were conducted to both the experimental group and control group in pre-test, next, self-regulatory group counseling was practiced to the experimental group. And finally, a post-test was given to both the experimental group and control group. For this study, 200 students from 6th-grader of S Elementary school located in Incheon were given the self-regulation test and chosen 50 students who received low marks. Then, 50 students were researched into the school life satisfaction scale and chosen 16 students who got average-below score again. It was two matching groups through consideration of their score of the school life satisfaction scale, 8 students were arranged to the experimental group and the rest to the control group. The Self-Regulatory Group Counseling program developed by Eun Hyuck-gi(1999). The program was based on the following three programs: "The development. of the Cognitive-Behavioral Counseling therapy and their reports" by Kim HyeSuk(1996), Group counseling" by Brigman and Early(1991) and the study on the improving program in human relation" by Park KyeongAe(1998). The Self-Regulatory Group Counseling program activity was conducted during 6 weeks. Each session was 60 minutes and it continued for 8 sessions. The data collected to find out a difference in self-regulation and the degree of school life satisfaction between the experimental and control groups were processed by means of SPSSWIN program, and the post-test between both the groups were comparatively analyzed through t-test, a mean difference test. The following conclusions were drawn from the results of this study. First, the self-regulatory group counseling program has obvious effect of improving the self-regulation of the higher grade students in Elementary school. Second, the self-regulatory group counseling program has obvious effect of improving the school life satisfaction of the higher grade students in Elementary school. Particularly, this study shows statistical significance in cognitive facts of the self-regulation and the degrees of satisfaction with general school life, teacher, friend and facilities. Since the self-regulatory group counseling program has positive effects on self-regulation and satisfaction with their school life, It is required to utilize the structured self-regulatory group counseling program in school more widely to help students.

• Journal of Korean Academy of Fundamentals of Nursing
• /
• v.6 no.1
• /
• pp.114-129
• /
• 1999

The purpose of this study was to use phenomenological perspectives to identify the meaning and structure of the exercise experiences in patients with low back pain. The participants were 20 patients who live in one city. The patients were asked to describe their exercise experiences. With permission of the subjects, the interviews were recorded and transcribed. Colaizzi's method was used for the phenomenological analysis. The investigator analysed the data to identify and categorize themes and basic structural elements. The process of the exercise experiences in patients with low back pain has three proposed phases pre-exercise phase, exercise phase, post-exercise phase. 150 formulating meanings, 54 themes, 20 theme clusters were identified. The interview data were organized by theme clusters into 9 categories : 'difficulties with activities of Daily Living', 'Psychological Distress', 'Support', 'Effectiveness after Exercise', 'Confidence of Healing', 'Importance of Exercise', 'Exorcise Self-Efficacy', 'Control', and 'Barrier'. Since the importance of exercise and exercise self-efficacy were identified as significant factors in this study, it may be important to plan nursing interventions to assist clients to realize the exercise self-efficacy and importance of exercise. Also, continuous support from health professionals, family, and experienced persons are needed. Further strategies for reducing barriers should be devised.

• English Language & Literature Teaching
• /
• v.12 no.3
• /
• pp.187-210
• /
• 2006

This study aims to investigate the effects of the implementation of self-directed learning through the homepage between the teacher and the students for English reading classes. The study focuses on the questions of whether the self-directed learning through the homepage, compared to the teacher-centered learning, would enable a significantly positive change in the students' achievements and of what their responses to this new learning method are. 72 students were grouped into an experimental and a control group, and then each group was subdivided into three levels (high, medium, low) of proficiency. Findings demonstrate that the experimental group showed statistically more significant increases in their scores of reading proficiency test than the control group. For the question of students' responses to the learning experience, the three groups within the experimental group responded to a questionnaire survey with regard to the positive attitude of learning, the effectiveness of self-directed learning and its learning materials, and usability of the homepage. In general, the experimental group considered the experience satisfactory, although the degree of positive responses varied according to the proficiency level of the group. This suggests the importance and effectiveness of self-directed learning using the computer and internet as a supplementary learning tool.

• Journal of Korean Academy of Fundamentals of Nursing
• /
• v.11 no.1
• /
• pp.59-66
• /
• 2004

Purpose: The purpose of this study was to investigate the relationship between eating disorder, self-esteem and depression in college women. Method: Participants were 282 college women. Data were collected between Nov. 1st and 30th, 2003, and provide basic data on eating disorder levels in college women and basic data for health control programs. The instrument was a questionnaire consisting of 8 items on general characteristics and weight control, 24 on eating disorders, 10 on self-esteem and 10 on depression. Analysis of the data was done using numbers, percentages, means and standard deviations, t-test and Pearson correlation coefficients. SPSS WIN 10.0 was used in data analysis. Result: The greatest difference for eating disorders was between the group with normal body weight and the group with low body weight (t=-6.94, p=.000). There was a high positive correlation between Body Mass Index and eating disorder (r=.383, p<.01), between eating disorder and depression (r=.161, p<.01). There was a high negative correlation between eating disorder and self-esteem (r=-.196, p<.01), and between self-esteem and depression (r=-.537, p<.01). Conclusion: These results indicate that college women need more education and counseling on dietary concerns. Also, systematic efforts to establish a more health conscious social standard for beauty should be taken. Further empirical and experimental studies are required to investigate factors influencing attitudes towards eating held by college women and to determine variables which affect various specific dimensions of these attitudes.

• Research in Community and Public Health Nursing
• /
• v.15 no.3
• /
• pp.397-407
• /
• 2004

Purpose: In Korea, as the number of hypertensive worker grows, identifying the level of health promoting life style practice and related factors in hypertensive workers is becoming more and more important. Method: The subjects of this study were 195 hypertensive male workers in Korea. The data was collected during 3 months ranging from August 2003 to October 2003. The data was analyzed by descriptive statistics. t-test, ANOVA. Pearson's correlation coefficient and stepwise multiple regression by SAS 8.1 program. Results: It was found that there were significant differences between age, religion, medication, perceived health status, perceived benefits, internal health locus of control, powerful other health locus of control and health promoting life style practice. The most significant factor affecting the health promoting life style practice was internal health locus of control. The combination of internal health locus of control, specific self-efficacy, powerful other health locus of control, general self-efficacy accounted for 51.0% of the health promoting life style practice. Conclusion: The level of health promoting life style practice was very low, so it is urgent to manage and care for hypertensive male workers continuously and systemically with occupational health nurses. Based on the above results, cognitive perceptual characteristics should be considered when developing health education programs for hypertensive workers.

• 제어로봇시스템학회:학술대회논문집
• /
• 2005.06a
• /
• pp.1039-1043
• /
• 2005

Despite the many significant advances made in robot architecture, the basic approaches are deliberative and reactive methods. They are quite different in recognizing outer environment and inner operating mechanism. For this reason, they have almost opposite characteristics. Later, researchers integrate these two approaches into hybrid architecture. In such architecture, Reactive module also called low-level motion control module have advantage in real-time reacting and sensing outer environment; Deliberative module also called high-level task planning module is good at planning task using world knowledge, reasoning and intelligent computing. This paper presents a framework of the integrated planning and control for mobile robot navigation. Unlike the existing hybrid architecture, it learns topological map from the world map by using MST (Minimum Spanning Tree)-based SOFM (Self-Organizing Feature Map) algorithm. High-level planning module plans simple tasks to low-level control module and low-level control module feedbacks the environment information to high-level planning module. This method allows for a tight integration between high-level and low-level modules, which provide real-time performance and strong adaptability and reactivity to outer environment and its unforeseen changes. This proposed framework is verified by simulation.

• The korean journal of orthodontics
• /
• v.49 no.1
• /
• pp.21-31
• /
• 2019

Objective: This study was performed to explore the effect of different bracket, archwire, and ligature combinations on resistance to sliding (RS) and rotational control in first-order angulation. Methods: Three types of brackets (multi-level low friction [MLF], self-ligating, and conventional brackets) coupled with four nickel-titanium archwires (0.012, 0.014, 0.016, and 0.018-inch diameter) and two stainless steel ligatures (0.20 and 0.25 mm) were tested in different first-order angulations ($0^{\circ}$, $2^{\circ}$, $4^{\circ}$, $6^{\circ}$, $8^{\circ}$, $10^{\circ}$, $15^{\circ}$, $20^{\circ}$) by using an Instron universal mechanical machine in the dry state at room temperature. RS value was evaluated and compared by one-way ANOVA. Results: Under the same angulation, the RS values showed the following order: conventional brackets > MLF brackets > self-ligating brackets. The RS was the highest for conventional brackets and showed a tendency to increase. The RS for MLF brackets coupled with thinner archwires and ligatures showed a similar tendency as the RS for the self-ligating bracket. In contrast, the RS for MLF brackets coupled with thicker archwires and ligatures increased like that for conventional brackets. MLF brackets showed the greatest range of critical contact angles in first-order angulation. Conclusions: The RS in first-order angulation is influenced by bracket design, archwire, and ligature dimension. In comparison with self-ligating and conventional brackets, MLF brackets could express low friction and rotational control with their greater range of critical contact angles.

• Journal of The Korean Society of Integrative Medicine
• /
• v.6 no.2
• /
• pp.59-68
• /
• 2018

Purpose : In this research, I tried to examine the effect of handwork activities through group activities on self-esteem and sympathy index. Method : In this research, for men and women enrolled in K university, we explain sufficiently the purpose and method of research and randomly assign to 20 training group and 20 control group for those who agreed with experiment we divided handwork activities twice a week from november 18, 2016 to December 6, six times in total for 30 minutes. Results : Compared with self-esteem among groups, group training exercises showed higher interpersonal relationships than control group, and self-accepted items and self-efficacy items decreased. empathy comparison that group fits according to arbitration period compared with group control training group, group of training exercise high emotional sympathy items and social skills items appear high, cognitive sympathy items are low. Conclusion : From the results of this study, it turned out that the activities of handwork by group improved interpersonal relationships, emotional sympathy and social skills. In light of the results of these studies, it can be considered that better results can be obtained when applied to children and young people who are forming self-esteem and cognitive sympathy. In future research, further studies based on age, sex and further research corresponding to each situation, student's self esteem and a broader material for developing program necessary for cognitive sympathy can be obtained.

• Journal of Engineering Education Research
• /
• v.16 no.1
• /
• pp.54-63
• /
• 2013

This study aims to investigate relationships among self-directed learning readiness [SDLR], prerequisite mathematics test score and achievement level in college mathematics. For this purpose, the adjusted SDLRS (self-directed learning readiness scale) of Guglielmino's model, the score of mathematics diagnostic assesment and first semester college mathematics score among 424 freshmen students of engineering department of D university in 2011 were used and analyzed. Research results are as follows: Firstly, freshmen of engineering department had average level of SDLR, though they showed relative low level of self-direction, passion and time control ability. Secondly, considering SDLR with the mathematics diagnostic assesment score (3 groups: high, middle, low), there were no statistically significant differences. Thirdly, concerning SDLR according to the achievement level in college mathematics, a group which acquired good achievement showed higher level of SDLR compared with middle or lowachievement group. Differences among three groups were statistically significant. Lastly, there were affirmative relationships between SDLR, mathematics diagnostic assesment score and achievement in college mathematics. Furthermore, mathematics diagnostic assesment score and achievement level in college mathematics were found to be the most closely related. Based on the results, we suggest strategies to elevate SDLR of engineering department students and improve their achievement in college mathematics.